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Find video protocols related to scientific articles indexed in Pubmed.
Next-generation sequencing of nine atrial fibrillation candidate genes identified novel de novo mutations in patients with extreme trait of atrial fibrillation.
J. Med. Genet.
PUBLISHED: 11-14-2014
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Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia. Genome-wide association studies (GWAS) have identified common variants in nine genomic regions associated with AF (KCNN3, PRRX1, PITX2, WNT8A, CAV1, C9orf3, SYNE2, HCN4 and ZFHX3 genes); however, the genetic variability of these risk variants does not explain the entire genetic susceptibility to AF. Rare variants missed by GWAS may also contribute to genetic risk of AF.
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Evaluation of the Contribution of Cyclooxygenase 2 Genotypes to Breast Cancer in Taiwan.
Anticancer Res.
PUBLISHED: 11-05-2014
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Overexpression of cyclooxygenase 2 (COX-2) has been suggested to be associated with breast carcinogenesis. The aim of the present study was to evaluate the contribution of genotypic polymorphisms in COX-2 to breast cancer risk of Taiwanese females. In total, 1,232 breast cancer patients and 1,232 healthy controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) methodology. Six polymorphic variants of COX-2, including G-1195A (rs689466), G-765C (rs20417), T8473C (rs5275), intron 1 (rs2745557), intron 5 (rs16825748) and intron 6 (rs2066826) were examined. The results showed that the GC genotype of COX-2, G-765C was associated with a lower risk compared to the wild-type GG genotype (odds ratio(OR)=0.66, 95% confidence interval(CI)=0.53-0.83, p=0.0005). The C allele of COX-2 G-765C was significantly more frequently found in controls than in cancer patients (p=0.0006). In addition, the OR of the GG/AG+AA, GC/GG and GC/AG+AA at G-765C/Intron 1 combined genotypes compared to wild-type GG/GG genotype were 0.79 (95%CI=0.66-0.96; p=0.0166), 0.61 (95%CI=0.48-0.78; p=0.0001), and 0.71 (95%CI=0.36-1.37; p=0.3040), respectively. As for the combination of G-765C and intron 6, the OR of the GG/AG+AA, GC/GG and GC/AG+AA combined genotypes compared with wild-type GG/GG reference genotype were 0.79 (95%CI=0.62-1.01; p=0.0561), 0.63 (95%CI=0.50-0.81; p=0.0003), and 0.68 (95%CI=0.38-1.21; p=0.1897), respectively. Our results indicate that the C allele of COX-2, G-765C was associated with a decreased risk of breast cancer in Taiwan, and could serve as an early detection and predictive marker for breast cancer risk.
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A Preliminary Examination of Aerobic Exercise Effects on Resting EEG in Children With ADHD.
J Atten Disord
PUBLISHED: 11-01-2014
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This study attempted to determine whether the effects of physical exercise were reflected in the resting electroencephalographic (EEG) pattern of ADHD children.
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Induction of Pi Form of Glutathione S-Transferase by Carnosic Acid Is Mediated through PI3K/Akt/NF-?B Pathway and Protects against Neurotoxicity.
Chem. Res. Toxicol.
PUBLISHED: 10-13-2014
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Carnosic acid (CA), a diterpene found in the rosemary (Rosmarinus officinalis), has been reported to have a neuroprotective effect. Glutathione S-transferase (GST) P (GSTP) is a phase II detoxifying enzyme that provides a neuroprotective effect. The aim of this study was to explore whether the neuroprotective effect of CA is via an upregulation of GSTP expression and the possible signaling pathways involved. SH-SY5Y cells were pretreated with 1 ?M CA followed by treatment with 100 ?M 6-hydroxydopamine (6-OHDA). Both immunoblotting and enzyme activity results show that CA also induced protein expression and enzyme activity of GSTP. Moreover, CA significantly increased the phosphorylation of phosphatidylinositol 3-kinase (PI3K)/Akt, the nuclear translocation of p65, but not mitogen-activated protein kinases (p < 0.05). Pretreatment with LY294002 (a PI3K/Akt inhibitor) suppressed the CA-induced phosphorylation of I?B kinase (IKK) and I?B?, p65 nuclear translocation, and nuclear factor-kappa B (NF-?B)-DNA binding activity as well as GSTP protein expression. Furthermore, CA attenuated 6-OHDA-induced caspase 3 activation, and cell death was reversed by GSTP siRNA or LY294002 treatment. Additionally, male Wistar rats with lesions induced by 6-OHDA treatment in the right striatum responded to treatment with CA, which significantly reversed the reduction in GSTP protein expression that resulted from lesioning. We suggest that CA prevents 6-OHDA-induced apoptosis through an increase in GSTP expression via activation of the PI3K/Akt/NF-?B pathway. Therefore, CA may be a promising candidate for use in the prevention of Parkinson's disease.
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The role of functional polymorphisms of cyclooxygenase 2 in renal cell carcinoma.
Anticancer Res.
PUBLISHED: 10-03-2014
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Renal cell carcinoma (RCC) accounts for about 3% of all cancer-related mortalities worldwide and the risk factors for the development of RCC have not yet been fully elucidated. Mounting evidence shows that overexpression of cyclo-oxygenase 2 (COX2) is commonly found in malignant tumors, including RCC. However, the contribution of genotypic variations of COX2 to RCC has not been studied. We hypothesized that variants of the COX2 gene are associated with risk of susceptibility to RCC in Taiwan. In this hospital-based case-control study, 92 patients with RCC and 580 age- and gender-matched cancer-free controls were recruited and the associations of COX2 A-1195G, G-765C, T+8473C, intron 1, intron 5, and intron 6 polymorphisms with RCC risk were examined in this Taiwanese population. The results showed that compared to the wild-type GG genotype, the CG genotype for COX2 G-765C was significantly associated with a lower risk of RCC (odds ratio=0.34, 95% confidence interval=0.15-0.80, p=0.0082). For other polymorphic sites, no obvious associations were found. There was also an obvious association of COX2 G765C genotype with reduced RCC risk among those without family cancer history (p=0.0331). These evidence indicated that COX2 G-765C genotype involved in the etiology of RCC and may serve as a novel genetic marker for susceptibility of RCC.
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Novel triarylamine-based polybenzoxazines with a donor-acceptor system for polymeric memory devices.
Chem. Commun. (Camb.)
PUBLISHED: 09-26-2014
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Novel polybenzoxazines consisting of electron-donating triphenylamine derivatives and electron-withdrawing 4,4'-diphenyl sulfone moieties were successfully prepared by the thermally induced ring-opening reaction of the corresponding PB precursors and utilized for memory devices.
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Association of caveolin-1 genotypes with renal cell carcinoma risk in taiwan.
Chin J Physiol
PUBLISHED: 09-24-2014
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The alteration of caveolin-1 (Cav-1) during carcinogenesis is of great interest and its over-expression in the tumor cell cytoplasm can predict a poor prognosis of renal cell carcinoma (RCC). However, whether the over-expression in RCC is associated with inherited polymorphism is not clear. In this hospital-based case-control study, the association of Cav-1 genotypes with RCC risk in a central Taiwanese population was investigated. Ninety-two patients with RCC and five hundred and eighty of age/gender-matched healthy controls were recruited and genotyped for six polymorphic sites at Cav-1, C521A (rs1997623), G14713A (rs3807987), G21985A (rs12672038), T28608A (rs3757733), T29107A (rs7804372), and G32124A (rs3807992). The results showed that there were statistically different distributions of the genotypic (P = 0.0170 and 0.0011) and allelic (P = 0.0033 and 0.0352) frequencies for the Cav-1 G14713A and T29107A polymorphisms among RCC patients and control subjects, respectively. As for the haplotype analysis, subjects carrying "GG/AT or GG/AA" at Cav-1 G14713A/T29107A showed a 2.06-fold increased odds ratio of RCC compared to those with GG/TT, while those of any other combinations were of unaltered odds ratios. In conclusion, this is the first report providing evidence showing that Cav-1 genotype is associated with RCC. The results showed that the G allele of the Cav-1 G14713A and the A allele of the Cav-1 T29107A are risky genetic factors for RCC susceptibility and the combinative GG/AT or GG/AA haplotype at Cav-1 G14713A/T29107A can serve as one of the RCC predictors for Taiwanese.
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The significant association of CCND1 genotypes with gastric cancer in Taiwan.
Anticancer Res.
PUBLISHED: 09-10-2014
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Gastric cancer is one of the most common malignant tumors worldwide. Due to the complex initiation and intricate progression mechanisms, early detection and effective treatment of gastric cancer are both difficult to achieve. The genetic polymorphisms encoding critical protein cyclin D1 (CCND1) to regulate cell cycle transition from G1 phase to S phase may determine the susceptibility of individuals to gastric cancer. The study aimed to examine the contribution of CCND1 genotypes to gastric cancer risk in Taiwan.
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Effects of interleukin-10 polymorphisms and smoking on the risk of gastric cancer in Taiwan.
In Vivo
PUBLISHED: 09-06-2014
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Gastric cancer is the second cause of death from cancer worldwide and its prevalence and mortality rates are still very high in developed countries. Interleukin-10 (IL10) is a pleiotropic cytokine produced by macrophages which can suppress and stimulate the immune response in tumorigenesis signaling. However, the contribution of IL10 genomic variants to gastric cancer is still largely unknown. In the present study, we aimed at investigating the role of IL10 genotypes in gastric cancer risk. The promoter single nucleotide polymorphisms on IL10, A-1082G (rs1800896), T-819C (rs3021097) and A-592C (rs1800872), were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method among 716 Taiwanese people (358 patients gastric cancer and 358 cancer-free controls). The results showed that there was a significant difference between the patient and control groups in the genotypic frequency distribution of IL10 A-1082G genotypes (p=0.0004). In addition, those carrying the G allele were found to have a higher risk for gastric cancer compared with those with the A allele (p=3.19×10(-5)). Furthermore, personal cigarrete smoking habits enhanced the gastric cancer risk for those IL10 A-1082G AG and GG carriers. In conclusion, AG and GG genotype at IL10 A-1082G, together with smoking, synergistically contribute to individual susceptibility for gastric cancer in Taiwan.
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Incidence trends of human papillomavirus-related head and neck cancer in Taiwan, 1995-2009.
Int. J. Cancer
PUBLISHED: 08-12-2014
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Recent studies suggested that human papillomavirus (HPV) is an emerging risk factor of head and neck cancer (HNC), particularly for oropharyngeal cancer. Studies from the West showed a rising trend of HPV-related HNC despite a decrease of the overall HNC incidence. In contrast, the overall HNC incidence in Taiwan has continued to rise. It is not clear whether the incidence trends of HPV-related HNC in Taiwan have a similar pattern to those from countries with an overall decreasing incidence of HNC. The current study examined the incidence trends of HPV-related and HPV-unrelated HNC in Taiwan using data from the Taiwan Cancer Registry. Our results showed that the incidence trends of HPV-related and HPV-unrelated HNC in Taiwan both rose during 1995-2009. The incidence of HPV-related HNC (1.3 per 100,000 in 1995 to 3.3 in 2009, annual percentage change (APC) = 6.9, P < 0.0001) rose more rapidly than the incidence of HPV-unrelated HNC (10.4 per 100,000 in 1995 to 21.7 in 2009, APC=5.0, P < 0.0001). The rising trend of HPV-related HNC was particularly prominent for HNC occurring in tonsil (APC = 8.2, P < 0.0001), in men (APC = 7.5, P < 0.0001), and in those aged between 40 and 50 years (APC = 8.5, P < 0.0001). Although the overall incidence of HNC in Taiwan has continued to increase, the most rapid rise is in the HPV-related HNC. This suggests that similar to the Western world, HPV-related HNC is becoming an important public health issue in Taiwan. This article is protected by copyright. All rights reserved.
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Disease-Targeted Sequencing of Ion Channel Genes identifies de novo mutations in Patients with Non-Familial Brugada Syndrome.
Sci Rep
PUBLISHED: 08-07-2014
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Brugada syndrome (BrS) is one of the ion channelopathies associated with sudden cardiac death (SCD). The most common BrS-associated gene (SCN5A) only accounts for approximately 20-25% of BrS patients. This study aims to identify novel mutations across human ion channels in non-familial BrS patients without SCN5A variants through disease-targeted sequencing. We performed disease-targeted multi-gene sequencing across 133 human ion channel genes and 12 reported BrS-associated genes in 15 unrelated, non-familial BrS patients without SCN5A variants. Candidate variants were validated by mass spectrometry and Sanger sequencing. Five de novo mutations were identified in four genes (SCNN1A, KCNJ16, KCNB2, and KCNT1) in three BrS patients (20%). Two of the three patients presented SCD and one had syncope. Interestingly, the two patients presented with SCD had compound mutations (SCNN1A:Arg350Gln and KCNB2:Glu522Lys; SCNN1A:Arg597* and KCNJ16:Ser261Gly). Importantly, two SCNN1A mutations were identified from different families. The KCNT1:Arg1106Gln mutation was identified in a patient with syncope. Bioinformatics algorithms predicted severe functional interruptions in these four mutation loci, suggesting their pivotal roles in BrS. This study identified four novel BrS-associated genes and indicated the effectiveness of this disease-targeted sequencing across ion channel genes for non-familial BrS patients without SCN5A variants.
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Urinary neutrophil gelatinase-associated lipocalin and clinical outcomes in chronic kidney disease patients.
Clin. Chem. Lab. Med.
PUBLISHED: 08-07-2014
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Abstract Background: Tubulointerstitial damage is a final common pathway of most renal diseases. Whether urinary neutrophil gelatinase-associated lipocalin (uNGAL), a biomarker for renal tubular damage, is of prognostic value for clinical outcomes in chronic kidney disease (CKD) patients has not been well investigated. Methods: The uNGAL and proteinuria levels were measured among a cohort of 473 advanced CKD patients of various etiologies recruited during 2002-2009. Results: The estimated glomerular filtration rate (eGFR) was 32.3±22.0 mL/min/1.73 m2 with a urine protein-to-creatinine ratio (UPCR) 680 (255-1248) mg/g and 132 (27.9%) participants had diabetes. The baseline uNGAL level was significantly associated with male gender, eGFR, UPCR, and hemoglobin. The hazard ratio (HR) of the highest uNGAL tertile for end-stage renal disease (ESRD) was 3.44 (95% CI 1.47-8.06, p=0.004). With the adjustment of urine creatinine and urine protein, HR of the highest urine NGAL-to-creatinine ratio (UNCR) tertile and the highest urine NGAL-to-protein ratio (UNPR) tertile was 3.06 (95% CI 1.19-7.90, p=0.02) and 2.10 (95% CI 1.13-3.89, p=0.02), respectively. UNPR increased the prediction of survival model for ESRD. HR of the highest UNCR tertile and UNPR tertile for cardiovascular (CV) events was 2.21 (95% CI 0.81-5.98, p=0.08) and 2.79 (95% CI 1.25-6.26, p=0.01), respectively. None of these were associated with all-cause mortality. Conclusions: Elevated uNGAL in CKD patients is associated with risks for ESRD and probably CV events. UNPR could improve the prediction for ESRD.
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Executive function and endocrinological responses to acute resistance exercise.
Front Behav Neurosci
PUBLISHED: 08-01-2014
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First, to explore the effects of acute resistance exercise (RE, i.e., using exercise machines to contract and stretch muscles) on behavioral and electrophysiological performance when performing a cognitive task involving executive functioning in young male adults; Second, to investigate the potential biochemical mechanisms of such facilitative effects using two neurotrophic factors [i.e., growth hormone (GH) and insulin-like growth factor-1 (IGF-1)] and the cortisol levels elicited by such an exercise intervention mode with two different exercise intensities. Sixty young male adults were recruited and randomly assigned to a high-intensity (HI) exercise group, moderate-intensity (MI) exercise group, and non-exercise-intervention (NEI) group. Blood samples were taken, and the behavioral and electrophysiological indices were simultaneously measured when individuals performed a Go/No-Go task combined with the Erikson Flanker paradigm at baseline and after either an acute bout of 30 min of moderate- or high-intensity RE or a control period. The results showed that the acute RE could not only benefit the subjects' behavioral (i.e., RTs and accuracy) performance, as found in previous studies, but also increase the P3 amplitude. Although the serum GH and IGF-1 levels were significantly increased via moderate or high intensity RE in both the MI and HI groups, the increased serum levels of neurotrophic factors were significantly decreased about 20 min after exercise. In addition, such changes were not correlated with the changes in cognitive (i.e., behavioral and electrophysiological) performance. In contrast, the serum levels of cortisol in the HI and MI groups were significantly lower after acute RE, and the changes in cortisol levels were significantly associated with the changes in electrophysiological (i.e., P3 amplitude) performance. The findings suggest the beneficial effects of acute RE on executive functioning could be due to changes in arousal, possibly modulated by the serum cortisol levels.
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Evaluation of the contribution of methylenetetrahydrofolate reductase genotypes to Taiwan breast cancer.
Anticancer Res.
PUBLISHED: 07-31-2014
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The aim of the present study was to evaluate the effects of the genotypic polymorphisms in methylenetetrahydrofolate reductase (MTHFR) and its interaction with early-onset breast cancer risk in Taiwan. Two well-known polymorphic variants of MTHFR, C677T (rs1801133) and A1298C (rs1801131), were analyzed and their joint effects with individual age- and estrogen-related factors on breast cancer risk were discussed. In total, 1,232 patients with breast cancer and 1,232 healthy controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The MTHFR C677T genotype, but not the A1298C, was differently distributed between cancer and control groups. The T allele of MTHFR C677T was significantly more frequently found in controls than in patients with cancer. In addition, females carrying MTHFR C677T CT or TT genotypes had a higher odds ratio of 1.21 (95% confidence interval=1.03-1.42, p=1.85E-5) for breast cancer, especially before the age of 45.4 years (odds ratio=1.51 and 95% confidence interval=1.20-1.90). Our results indicate that MTHFR C677T T allele was associated with increased risk of breast cancer in Taiwan, especially in cases who were 45.4 old or younger and with earlier menarche age (<12.2 years).
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Variability in Estimated Glomerular Filtration Rate by Area under the Curve Predicts Renal Outcomes in Chronic Kidney Disease.
ScientificWorldJournal
PUBLISHED: 07-16-2014
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Greater variability in renal function is associated with mortality in patients with chronic kidney disease (CKD). However, few studies have demonstrated the predictive value of renal function variability in relation to renal outcomes. This study investigates the predictive ability of different methods of determining estimated glomerular filtration rate (eGFR) variability for progression to renal replacement therapy (RRT) in CKD patients. This was a prospective observational study, which enrolled 1,862 CKD patients. The renal end point was defined as commencement of RRT. The variability in eGFR was measured by the area under the eGFR curve (AUC)%. A significant improvement in model prediction was based on the -2 log likelihood ratio statistic. During a median 28.7-month follow-up, there were 564 (30.3%) patients receiving RRT. In an adjusted Cox model, a smaller initial eGFR AUC%_12M (P < 0.001), a smaller peak eGFR AUC%_12M (P < 0.001), and a larger negative eGFR slope_12M (P < 0.001) were associated with a higher risk of renal end point. Two calculated formulas: initial eGFR AUC%_12M and eGFR slope_12M were the best predictors. Our results demonstrate that the greater eGFR variability by AUC% is associated with the higher risk of progression to RRT.
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Significant association of Interleukin-10 genotypes and oral cancer susceptibility in Taiwan.
Anticancer Res.
PUBLISHED: 07-02-2014
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Interleukin-10 (IL10) is an immunosuppressive cytokine which may facilitate carcinogenesis by down-regulating interferon-gamma production and supporting tumor escape from the immune response. Polymorphisms within the promoter of IL10 gene may not only contribute to differential IL10 expression levels among individuals but also to oral cancer susceptibility. In this hospital-based study, the association of IL10 A-1082G (rs1800896), T-819C (rs3021097), and A-592C (rs1800872) polymorphisms with oral cancer risk were examined. A total of 788 cases with oral cancer risk and 956 controls were genotypes and analyzed by polymerase chain reaction and restriction fragment length polymorphism. The results showed that there were significant differential distributions among oral cancer cases and controls in the genotypic (p=6.29×10(-11)) and allelic (p=2.80×10(-13)) frequencies of IL10 A-1082G. Individuals who carried the AG or GG genotype for IL10 A-1082G had a 1.90- and 3.27-fold higher risk, respectively, of developing nasopharyngeal carcinoma compared to those who carried AA genotype (95% confidence interval=1.51-2.39 and 1.95-5.47). None of the other two polymorphisms investigated appear to affect cancer risk. In gene-lifestyle interaction analysis, we provide first evidence showing of an obvious joint effect of IL10 A-1082G genotype with individual smoking and areca chewing habits on nasopharyngeal carcinoma risk. The AG and GG genotypes of IL10 A-1082G, together with smoking and areca chewing habits, synergistically contribute to individual susceptibility for oral cancer.
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Contribution of DNA double-strand break repair gene XRCC3 genotypes to oral cancer susceptibility in Taiwan.
Anticancer Res.
PUBLISHED: 06-13-2014
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The DNA repair gene X-ray repair cross complementing protein 3 (XRCC3) is thought to play a major role in double-strand break repair and in maintaining genomic stability. Very possibly, defective double-strand break repair of cells can lead to carcinogenesis. Therefore, a case-control study was performed to reveal the contribution of XRCC3 genotypes to individual oral cancer susceptibility. In this hospital-based research, the association of XRCC3 rs1799794, rs45603942, rs861530, rs3212057, rs1799796, rs861539, rs28903081 genotypes with oral cancer risk in a Taiwanese population was investigated. In total, 788 patients with oral cancer and 956 age- and gender-matched healthy controls were genotyped. The results showed that there was significant differential distribution among oral cancer and controls in the genotypic (p=0.001428) and allelic (p=0.0013) frequencies of XRCC3 rs861539. As for the other polymorphisms, there was no difference between case and control groups. In gene-lifestyle interaction analysis, we have provided the first evidence showing that there is an obvious joint effect of XRCC3 rs861539 genotype with individual areca chewing habits on oral cancer risk. In conclusion, the T allele of XRCC3 rs861539, which has an interaction with areca chewing habit in oral carcinogenesis, may be an early marker for oral cancer in Taiwanese.
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Dose-response Relationship between Exercise Duration and Cognition.
Med Sci Sports Exerc
PUBLISHED: 05-30-2014
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The study aimed to provide evidence-based recommendations for the prescription of a single session of exercise to improve cognitive performance. In particular, the purpose was to determine the dose-response relationship between exercise duration and cognitive performance for a moderate intensity session of aerobic exercise.
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A novel caveolin-1 biomarker for clinical outcome of sarcopenia.
In Vivo
PUBLISHED: 05-13-2014
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Sarcopenia, defined by the European Working Group on Sarcopenia in Older People as leading to significantly decreased muscle mass and function, contributes to increased risk of adverse health outcomes among older people. Caveolin-1 (CAV1) is a main structural protein playing a regulatory role in signaling pathways and muscle normality. However, the role of CAV1 in the development of sarcopenia is largely unknown. In this study, we aimed to investigate the contribution of CAV1 genotype to sarcopenia in a Taiwanese population. We enrolled 175 patients with sarcopenia (56 pre-sarcopenia, 63 sarcopenia and 56 severe sarcopenia) and 327 age- and gender-matched controls in this community-based case control study. The associations of six single nucleotide polymorphisms of the CAV1 gene at C521A (rs1997623), G14713A (rs3807987), G21985A (12672038), T28608A (rs3757733), T29107A (rs7804372), and G32124A (rs3807992) with sarcopenia risk were evaluated. After grouping the sarcopenia patients together, the results showed that there was a significant differential distribution among the cases and controls in their CAV1 G14713A genotype (p=0.0235), and those carrying the AG and AA genotypes had 1.65- and 1.78-fold higher odds ratios for sarcopenia compared to those with the GG genotype (95% confidence interval=1.09-2.49 and 0.96-3.31, respectively). Furthermore, the carriers with CAV1 G14713A AG or AA genotype had a higher risk for sarcopenia and severe sarcopenia, but not pre-sarcopenia, compared to those with the GG genotype. Our findings suggest that Cav1 may play a critical role in the etiology of sarcopenia, and the A allele of Cav1 G14713A may serve as an early marker for detection of sarcopenia and severe sarcopenia.
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Association of caveolin-1 genotypes with gastric cancer in Taiwan.
Anticancer Res.
PUBLISHED: 04-30-2014
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Gastric cancer is one of the leading causes of tumor-related death worldwide, for which the prevalence and mortality rates are very high in developed countries. Caveolin-1 (Cav-1) is the main protein in the caveolin family and plays a role in tumorigenesis signaling. The contribution of CAV1 genetic variants to gastric cancer is still largely unknown. In the present study, we aimed to investigate the role of CAV1 genotypes in gastric cancer risk. We recruited 358 gastric patients and 358 cancer-free controls for CAV1 genotyping analysis. Six single-nucleotide polymorphisms (SNPs) of CAV1, C521A (rs1997623), G14713A (rs3807987), G21985A (12672038), T28608A (rs3757733), T29107A (rs7804372), and G32124A (rs3807992), were genotyped by the polymerase chain reaction-restriction fragment length polymorphism method. There was a significant difference between the gastric cancer and control groups in the genotypic frequency distribution of the CAV1 G14713A genotypes (p=1.24*10(-5)), with those carrying the A allele having a higher risk for gastric cancer compared to those with the GG genotype (p=0.0001). Our findings suggested that CAV1 genotype may determine the individual susceptibility to gastric cancer, and that the CAV1 G14713A genotype may serve as a novel biomarker for early detection and prediction of gastric cancer.
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Clinical characteristics of patients with congenital long QT syndrome and bigenic mutations.
Chin. Med. J.
PUBLISHED: 04-26-2014
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Congenital long QT syndrome (LQTS) is an ion channelopathy associated with genetic mutations. It is well known that most LQTS patients (91%) have a single mutation. The purpose of this study was to investigate the clinical characteristics of congenital LQTS patients with bigenic mutations in Taiwan, China.
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Renin-angiotensin system gene polymorphisms predict the risk of stroke in patients with atrial fibrillation: a 10-year prospective follow-up study.
Heart Rhythm
PUBLISHED: 04-13-2014
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Little evidence is available regarding the impact of genetic polymorphisms on the risk of stroke in patients with atrial fibrillation (AF). Angiotensin II plays a pathophysiologic role in prothrombotic atrial endocardial remodeling.
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Systolic blood pressure and outcomes in stage 3-4 chronic kidney disease patients: evidence from a taiwanese cohort.
Am. J. Hypertens.
PUBLISHED: 04-11-2014
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Systolic blood pressure (SBP) goal for chronic kidney disease (CKD) patients is ?140mm Hg. However, the SBP target provides no suggested lower limit, and some studies indicate that a lower SBP target may be harmful. We aimed to investigate the J-shaped relationship between SBP and clinical outcomes in CKD patients and the factors that modify this relationship.
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Clinical learning environment measurement for medical trainees at transitions: relations with socio-cultural factors and mental distress.
BMC Med Educ
PUBLISHED: 04-02-2014
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Measuring clinical learning environment is crucial for the quality improvement of medical education, especially for medical trainees at transition stages. Medical education in Taiwan is shaped by multiple socio-cultural influences. The aims of this study were to construct an instrument for measuring clinical learning environment in alignment with the local socio-cultural factors and medical training settings, and further investigate the relationship between the quality of the clinical learning environment and the status of mental distress among medical trainees.
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The mechanisms of carnosic acid attenuates tumor necrosis factor-?-mediated inflammation and insulin resistance in 3T3-L1 adipocytes.
Mol Nutr Food Res
PUBLISHED: 03-27-2014
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Insulin resistance has been linked to a low-grade chronic inflammatory response. Carnosic acid (CA), which is found in rosemary, has been reported to have antioxidant, anti-inflammation, and anti-adipogenic properties. Here, we examined the effects of CA on inflammation and insulin resistance in 3T3-L1 adipocytes treated with tumor necrosis factor-? (TNF-?).
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Functional connectivity between parietal cortex and the cardiac autonomic system in uremics.
Kaohsiung J. Med. Sci.
PUBLISHED: 03-04-2014
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Although the central autonomic network (CAN) has been well researched in animal models, the CAN in humans is still unclear, especially for cardiovascular control. This study aimed to investigate which areas of the cerebral cortices are associated with the peripheral cardiac autonomic control involved in the CAN in uremic patients with autonomic dysfunction and normal controls. The central and peripheral autonomic network in 19 uremic patients with significant autonomic dysfunction and 24 age- and sex-matched controls [mean age ± standard deviation (SD), 55.16 ± 10.45 years and 55.42 ± 5.42 years, respectively] were evaluated by simultaneous spectral analysis of electroencephalography (EEG) and electrocardiography recording (ECG), along with serial autonomic tests [autonomic questionnaire and orthostatic blood pressure (BP) change]. Only frequency-domain heart rate variability (f-HRV) during the deep-breathing stage could differentiate the two groups. Although there is no significant difference in f-HRV during the quiet-breathing stage, different patterns of central oscillation and their correlation with peripheral cardiac autonomic indices could be found for the two groups. Although the power of specific EEG bands under electrode T3 and T6 correlated significantly with the power of peripheral HRV indices in the control group, those under electrodes P3 and Pz had significant correlations in the uremic group suggesting a role of functional connectivity between them. In addition, sympathetic activity is correlated with slow wave EEG (theta/delta) power whereas parasympathetic activity is correlated with fast wave EEG (beta) power. In conclusion, there is functional connectivity between the parietal cortex and the peripheral cardiac autonomic system (PAN) in uremics and the pattern of central autonomic connectivity differs between uremic patients with autonomic dysfunction and normal controls.
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Clinical teachers' perspectives on cultural competence in medical education.
Med Educ
PUBLISHED: 02-18-2014
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Globalisation and migration have inevitably shaped the objectives and content of medical education worldwide. Medical educators have responded to the consequent cultural diversity by advocating that future doctors should be culturally competent in caring for patients. As frontline clinical teachers play a key role in interpreting curriculum innovations and implementing both explicit and hidden curricula, this study investigated clinical teachers' attitudes towards cultural competence training in terms of curriculum design, educational effectiveness and barriers to implementation.
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The epidemiology of gastrointestinal stromal tumors in Taiwan, 1998-2008: a nation-wide cancer registry-based study.
BMC Cancer
PUBLISHED: 02-12-2014
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To investigate the incidence of gastrointestinal stromal tumors (GISTs) in Taiwan and the impact of imatinib on the overall survival (OS) of GIST patients.
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Impact of acute aerobic exercise and cardiorespiratory fitness on visuospatial attention performance and serum BDNF levels.
Psychoneuroendocrinology
PUBLISHED: 02-06-2014
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The purpose of the current study was to explore various behavioral and neuroelectric indices after acute aerobic exercise in young adults with different cardiorespiratory fitness levels when performing a cognitive task, and also to gain a mechanistic understanding of the effects of such exercise using the brain-derived neurotrophic factor (BDNF) biochemical index. Sixty young adults were separated into one non-exercise-intervention and two exercise intervention (EI) (i.e., EIH: higher-fit and EIL: lower-fit) groups according to their maximal oxygen consumption. The participants' cognitive performances (i.e., behavioral and neuroelectric indices via an endogenous visuospatial attention task test) and serum BDNF levels were measured at baseline and after either an acute bout of 30min of moderate intensity aerobic exercise or a control period. Analyses of the results revealed that although acute aerobic exercise decreased reaction times (RTs) and increased the central Contingent Negative Variation (CNV) area in both EI groups, only the EIH group showed larger P3 amplitude and increased frontal CNV area after acute exercise. Elevated BDNF levels were shown after acute exercise for both EI groups, but this was not significantly correlated with changes in behavioral and neuroelectric performances for either group. These results suggest that both EI groups could gain response-related (i.e., RT and central CNV) benefits following a bout of moderate acute aerobic exercise. However, only higher-fit individuals could obtain particular cognition-process-related efficiency with regard to attentional resource allocation (i.e., P3 amplitude) and cognitive preparation processes (i.e., frontal CNV) after acute exercise, implying that the mechanisms underlying the effects of such exercise on neural functioning may be fitness dependent. However, the facilitating effects found in this work could not be attributed to the transient change in BDNF levels after acute exercise.
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Connective tissue growth factor and cardiac diastolic dysfunction: human data from the Taiwan diastolic heart failure registry and molecular basis by cellular and animal models.
Eur. J. Heart Fail.
PUBLISHED: 01-28-2014
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Connective tissue growth factor (CTGF) is an emerging marker for tissue fibrosis. We investigated the association between CTGF and cardiac diastolic function using cellular and animal models and clinical human data.
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Prognostic factors of heart failure with preserved ejection fraction: a 12-year prospective cohort follow-up study.
Int. J. Cardiol.
PUBLISHED: 01-21-2014
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Although heart failure with preserved ejection fraction (HFpEF) is a clinically important issue, the factors that affect its prognosis are still unclear. The aim of this study was to establish prognostic factors and develop a severity scale for the disease based on a long-term follow-up cohort of HFpEF patients.
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Simultaneous production of fatty acid methyl esters and diglycerides by four recombinant Candida rugosa lipase's isozymes.
Food Chem
PUBLISHED: 01-14-2014
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In this study, the catalytic efficiency of four recombinant CRL (Candida rugosa lipase) isozymes (LIP1-LIP4) towards the production of fatty acid methyl ester (FAME) was compared and evaluated as an alternative green method for industrial applications. The results indicated that the recombinant C. rugosa LIP1 enzyme exhibited the highest catalytic efficiency for FAME production compared to the recombinant C. rugosa LIP2-LIP4 enzymes. The optimal conditions were as follows: pH 7.0, methanol/soybean oil molar ratio: 3/1, enzyme amount: 2U (1.6 ?L), reaction temperature: 20°C, 22 h of reaction time, and 3 times of methanol addition (1 mol/6h), and resulted in 61.5 ± 1.5 wt.% of FAME conversion. The reaction product contained also 10 wt.% of DAG with a ratio of 1,3-DAG to 1,2-DAG of approximately 4:6, and can be potentially used in industrial applications as a food emulsifier.
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Anti-anxiety drugs use and cardiovascular outcomes in patients with myocardial infarction: a national wide assessment.
Atherosclerosis
PUBLISHED: 01-13-2014
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Anti-anxiety medication in patients with anxiety may lessen the stress and thereby lower their risk for myocardial infarction (MI). The aim of current study is to examine an association between the use of anti-anxiety medication and long-term mortality risk in patients following MI.
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Continuation of statin therapy and a decreased risk of atrial fibrillation/flutter in patients with and without chronic kidney disease.
Atherosclerosis
PUBLISHED: 01-10-2014
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To contain cost, Taiwan's previous National Health Insurance Reimbursement Policy requested that physicians discontinue their patients' statin therapy once the serum cholesterol had reached appropriate levels. This allowed us to evaluate the association between statin continuation and the occurrence of atrial fibrillation/flutter and whether it was modified by chronic kidney disease (CKD) status.
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Utilizing multiple in silico analyses to identify putative causal SCN5A variants in Brugada syndrome.
Sci Rep
PUBLISHED: 01-03-2014
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Brugada syndrome (BrS) is an inheritable sudden cardiac death disease mainly caused by SCN5A mutations. Traditional approaches can be costly and time-consuming if all candidate variants need to be validated through in vitro studies. Therefore, we developed a new approach by combining multiple in silico analyses to predict functional and structural changes of candidate SCN5A variants in BrS before conducting in vitro studies. Five SCN5A non-synonymous variants (1651G>A, 1776C>G, 1673A>G, 3269C>T and 3578G>A) were identified in 14 BrS patients using direct DNA sequencing. Several bioinformatics algorithms were applied and predicted that 1651G>A (A551T) and 1776C>G (N592K) were high-risk SCN5A variants (odds ratio 59.59 and 23.93). The results were validated by Mass spectrometry and in vitro electrophysiological assays. We concluded that integrating sequence-based information and secondary protein structures elements may help select highly potential variants in BrS before conducting time-consuming electrophysiological studies and two novel SCN5A mutations were validated.
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Association of angiopoietin-2 with renal outcome in chronic kidney disease.
PLoS ONE
PUBLISHED: 01-01-2014
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The pathophysiological mechanisms of renal function progression in chronic kidney disease (CKD) have still not been completely explored. In addition to well-known traditional risk factors, non-traditional risk factors, such as endothelial dysfunction, have gradually attracted physicians' attention. Angiopoietin-2 (Ang-2) impairs endothelial function through preventing angiopoietin-1 from binding to Tie2 receptor. Whether Ang-2 is associated with renal function progression in CKD is unknown.
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Association of relatives of hemodialysis patients with metabolic syndrome, albuminuria and Framingham Risk Score.
PLoS ONE
PUBLISHED: 01-01-2014
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Metabolic syndrome (MetS), albuminuria, and the Framingham Risk Score (FRS) are significant predictors for cardiovascular disease (CVD). However, the relationship and clinical significance of these CVD predictors in individuals with a family history of end-stage renal disease (ESRD) are unclear. We investigated the association of relatives of hemodialysis (HD) patients with MetS, albuminuria, and the FRS.
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Associations of Cyclooxygenase 2 Polymorphic Genotypes with Bladder Cancer Risk in Taiwan.
Anticancer Res.
PUBLISHED: 12-11-2013
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Aim: Bladder cancer is the sixth most common cancer worldwide and its incidence is particularly high in southwestern Taiwan. However, the genetic contribution to its etiology is not well-understood. The aim of this study is to evaluate the association of cyclooxygenase 2 (Cox-2) polymorphic genotypes with Taiwan bladder cancer patients.
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Significant association of caveolin-1 (CAV1) genotypes with upper urothelial tract cancer.
Anticancer Res.
PUBLISHED: 11-14-2013
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Upper urothelial tract cancer is unusually of high incidence in Taiwan and it is valuable to study the specificity of this disease in Taiwan and compare the corresponding findings with those of Western countries. In the literature, it has been reported that single nucleotide variation of caveolin-1 gene (CAV1) plays an important role in risk of several types of cancer, such as hepatoma, leukemia, nasopharyngeal carcinoma, oral, breast, bladder and prostate cancer, but we are not aware of any reports on upper urothelial tract cancer. The aim of this study was to evaluate the association of six polymorphic genotypes of CAV1 with upper urothelial tract cancer within a Taiwanese population.
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Effects of Cardiorespiratory Fitness Enhancement on Deficits in Visuospatial Working Memory in Children with Developmental Coordination Disorder: A Cognitive Electrophysiological Study.
Arch Clin Neuropsychol
PUBLISHED: 10-29-2013
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The present study aimed to explore the effectiveness of chronic aerobic exercise intervention on the behavioral and neuroelectric performances of children with developmental coordination disorder (DCD) when carrying out a visuospatial working memory (VSWM) task. Twenty typically developing children and 40 children with DCD, equally divided into DCD-training and DCD nontraining groups, performed the cognitive task with concomitant event-related potential recording before and after 16 weeks of endurance training. Results indicated that the children with DCD displayed VSWM deficits with regard to behavioral performance (i.e., slower reaction time and low accuracy rate) and the neuroelectric indices (i.e., smaller P3 and pSW amplitudes) during the retrieval-process phase as reported in previous studies. However, after the exercise intervention, DCD-training group showed significantly higher accuracy rates and enhanced P3 amplitudes during the encoding and retrieval-process phases, compared with their pre-training performances. These findings suggest that increased cardiorespiratory fitness could effectively improve the performance of the VSWM task in children with DCD, by enabling the allocation of greater working memory resources related to encoding and retrieval.
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Inactivation of Myosin binding protein C homolog in zebrafish as a model for human cardiac hypertrophy and diastolic dysfunction.
J Am Heart Assoc
PUBLISHED: 09-20-2013
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Sudden cardiac death due to malignant ventricular arrhythmia is a devastating manifestation of cardiac hypertrophy. Sarcomere protein myosin binding protein C is functionally related to cardiac diastolic function and hypertrophy. Zebrafish is a better model to study human electrophysiology and arrhythmia than rodents because of the electrophysiological characteristics similar to those of humans.
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Effects of ataxia telangiectasia mutated (ATM) genotypes and smoking habits on lung cancer risk in Taiwan.
Anticancer Res.
PUBLISHED: 09-12-2013
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The study aimed to evaluate the association and interaction of ataxia telangiectasia mutated (ATM) genetic polymorphisms with lung cancer risk in Taiwan, where lung cancer is the primary cause of cancer-related death.
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Additive effect of the metabolic syndrome score to the conventional CHADS2 score for the thromboembolic risk stratification of patients with atrial fibrillation.
Heart Rhythm
PUBLISHED: 09-03-2013
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The CHA2DS2-VASC scoring scheme may not be better than the CHADS2 scoring scheme in predicting thromboembolic risk for patients with atrial fibrillation (AF) in Asians. Metabolic syndrome is associated with an increased risk of thrombosis.
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The Joint Effect of hOGG1 Genotype and Smoking Habit on Endometriosis in Taiwan.
Chin J Physiol
PUBLISHED: 08-31-2013
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This study has two aims: [1] to evaluate the association between hOGG1 genotypic polymorphism and endometriosis risk, and [2] to investigate the joint effects of hOGG1 genotype and smoking habit on endometriosis susceptibility in Taiwan. For this purpose, the well-known polymorphic variants of hOGG1, codon 326, was genotyped and analyzed of its association with the risk of endometriosis. In total, 153 patients with endometriosis and 636 non-endometriosis healthy controls were recruited and genotyped. The methodology for genotyping is polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Pearsons Chi-square test was performed to compare the distributions of the genotypes between case and control groups. The results showed that the hOGG1 codon 326 genotypes were not differently distributed between the endometriosis and non-endometriosis control groups in both genotypic (P = 0.6212) and allelic (P = 0.4006) frequency analysis. We have further analyzed the genotypic-smoking joint effects on endometriosis risk and found an obvious interaction between hOGG1 codon 326 genotypes and smoking status. The hOGG1 codon 326 genotypes were increased in endometriosis risk only in the smoker groups (P = 0.0061), but not in the non-chewer group (P = 0.0648). Our results provide the evidence that the hOGG1 codon 326 genotype may have a joint effect with smoking on the development of endometriosis.
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Dyslipoproteinemia and impairment of renal function in diabetic kidney disease: an analysis of animal studies, observational studies, and clinical trials.
Rev Diabet Stud
PUBLISHED: 08-10-2013
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Dyslipoproteinemia is highly prevalent in diabetes, chronic kidney disease, and diabetic kidney disease (DKD). Both diabetes and chronic kidney disease (CKD) are associated with hypertriglyceridemia, lower high-density lipoprotein, and higher small, dense low-density lipoprotein. A number of observational studies have reported that dyslipidemia may be associated with albuminuria, renal function impairment, and end-stage renal disease (ESRD) in the general population, and especially in CKD and DKD patients. Diabetic glomerulopathy and the related albuminuria are the main manifestations of DKD. Numerous animal studies support the finding that glomerular atherosclerosis is the main mechanism of glomerulosclerosis in CKD and DKD. Some randomized, controlled trials suggest the use of statins for the prevention of albuminuria and renal function impairment in CKD and DKD patients. However, a large clinical study, the Study of Heart and Renal Protection (SHARP), does not support that statins could reduce ESRD in CKD. In this article, we analyze the complex association of dyslipoproteinemia with DKD and deduce its relevance from animal studies, observational studies, and clinical trials. We show that special subgroups could benefit from the statin treatment.
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Association of interleukin-10 (IL10) promoter genotypes with nasopharyngeal carcinoma risk in Taiwan.
Anticancer Res.
PUBLISHED: 07-31-2013
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Nasopharyngeal carcinoma (NPC) is a multifactorial type of cancer, and cytokines driving the immune response seem to be disturbed in patients with NPC. Interleukin-10 (IL10) is an immunosuppressive cytokine which may facilitate carcinogenesis by down-regulating interferon-gamma production and supporting tumor escape from the immune response. We propose that differential expression levels of IL10 among individuals due to polymorphisms within the promoter of IL-10 gene, may be associated with NPC susceptibility. Therefore, the current study aimed at investigating the association of IL10 promoter genotypes with NPC and examining the interaction among the IL10 genotype and individual smoking habit in NPC susceptibility in Taiwan. A total of 698 native Taiwanese consisting of 176 cases and 522 controls were enrolled in this hospital-based study, and three single-nucleotide polymorphism sites at promoter regions of IL10, A-1082G (rs1800896), T-819C (rs3021097), and A-592C (rs1800872) were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and their interaction with smoking habit for NPC risk were evaluated. There were significantly different distributions of genotypic (p=0.0004) and allelic (p=0.0222) frequencies of IL10 A-1082G among NPC and controls. Individuals who carried AG or GG genotypes for IL10 A-1082G had a 1.91- and 3.26-fold higher risk of developing NPC compared to those who carried the AA genotype (95% confidence interval=1.28-2.85 and 1.35-7.85), respectively. None of the other polymorphisms investigated appeared to affect NPC risk. In gene-lifestyle interaction analysis, we have provided the first evidence ever to show that there is an obvious joint effect of IL10 A-1082G genotype with individual smoking habit on NPC risk. The results support the concept that interleukins may play a role in NPC development and that IL10 A-1082G, which is closely related to its protein expression, maybe a useful biomarker for NPC progression.
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Association of metabolic syndrome and albuminuria with cardiovascular risk in occupational drivers.
Int J Mol Sci
PUBLISHED: 07-29-2013
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Metabolic syndrome (MetS) and albuminuria increase cardiovascular risk. However, in occupational drivers, the clinical significance of albuminuria and its association with MetS remain unclear. We investigated the prevalence of MetS, albuminuria and cardiovascular risk, and its associated risk factors in occupational drivers;
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The contribution of DNA apurinic/apyrimidinic endonuclease genotype and smoking habit to Taiwan lung cancer risk.
Anticancer Res.
PUBLISHED: 06-11-2013
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To evaluate the association and interaction of genotypic polymorphism the gene for DNA-apurinic/apyrimidinic endonuclease (APEX1) with personal smoking habit and lung cancer risk in Taiwan, the polymorphic variants of APEX1, Asp(148)Glu (rs1130409), were analyzed in association with lung cancer risk, and their joint effect with personal smoking habits on lung cancer susceptibility was discussed. In this hospital-based case-control study, 358 patients with lung cancer and 716 cancer-free controls, frequency-matched by age and sex, were recruited and genotyped by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP). The results showed that the percentages of TT, TG and GG APEX1 Asp(148)Glu genotypes were not significantly different at 43.0%, 41.1% and 15.9% in the lung cancer patient group and 39.9%, 46.1% and 14.0% in non-cancer control group, respectively. We further analyzed the genetic-lifestyle effects on lung cancer risk and found the contribution of APEX1 Asp(148)Glu genotypes to lung cancer susceptibility was neither enhanced in the cigarette smokers nor in the non-smokers (p=0.3550 and 0.8019, respectively). Our results provide evidence that the non-synonymous polymorphism of APEX1 Asp(148)Glu may not be directly associated with lung cancer risk, nor enhance the effects of smoking habit on lung cancer development.
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Indigofera suffruticosa Mill extracts up-regulate the expression of the ? class of glutathione S-transferase and NAD(P)H: quinone oxidoreductase 1 in rat Clone 9 liver cells.
Food Chem. Toxicol.
PUBLISHED: 05-06-2013
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Because induction of phase II detoxification enzyme is important for chemoprevention, we study the effects of Indigofera suffruticosa Mill, a medicinal herb, on the expression of ? class of glutathione S-transferase (GSTP) and NAD(P)H: quinone oxidoreductase 1 (NQO1) in rat Clone 9 liver cells. Both water and ethanolic extracts of I. suffruticosa significantly increased the expression and enzyme activities of GSTP and NQO1. I. suffruticosa extracts up-regulated GSTP promoter activity and the binding affinity of nuclear factor erythroid 2-related factor 2 (Nrf2) with the GSTP enhancer I oligonucleotide. Moreover, I. suffruticosa extracts increased nuclear Nrf2 accumulation as well as ARE transcriptional activity. The level of phospho-ERK was augmented by I. suffruticosa extracts, and the ERK inhibitor PD98059 abolished the I. suffruticosa extract-induced ERK activation and GSTP and NQO-1 expression. Moreover, I. suffruticosa extracts, especially the ethanolic extract increased the glutathione level in mouse liver and red blood cells as well as Clone 9 liver cells. The efficacy of I. suffruticosa extracts in induction of phase II detoxification enzymes and glutathione content implies that I. suffruticosa could be considered as a potential chemopreventive agent.
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Association of Fluid Overload With Kidney Disease Progression in Advanced CKD: A Prospective Cohort Study.
Am. J. Kidney Dis.
PUBLISHED: 03-13-2013
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Fluid overload is a common phenomenon in patients in a late stage of chronic kidney disease (CKD). However, little is known about whether fluid overload is related to kidney disease progression in patients with CKD. Accordingly, the aim of the study was to assess the association of the severity of fluid status and kidney disease progression in an advanced CKD cohort.
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Anti-atherosclerotic potential of gossypetin via inhibiting LDL oxidation and foam cell formation.
Toxicol. Appl. Pharmacol.
PUBLISHED: 02-26-2013
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Gossypetin, a flavone originally isolated from Hibiscus species, has been shown to possess antioxidant, antimicrobial, and antimutagenic activities. Here, we investigated the mechanism(s) underlying the anti-atherosclerotic potential of gossypetin. 1,1-Diphenyl-2-picrylhydrazyl (DPPH) scavenging activity assay showed that the addition of >50?M of gossypetin could scavenge over 50% of DPPH radicals. The inhibitory effects of gossypetin on the lipid and protein oxidation of LDL were defined by thiobarbituric acid reactive substance (TBARS) assay, the relative electrophoretic mobility (REM) of oxidized LDL (ox-LDL), and fragmentation of apoB in the Cu(2+)-induced oxidation of LDL. Gossypetin showed potential in reducing ox-LDL-induced foam cell formation and intracellular lipid accumulation, and uptake ability of macrophages under non-cytotoxic concentrations. Molecular data showed that these influences of gossypetin might be mediated via peroxisome proliferator-activated receptor ? (PPAR?)/liver-X receptor ? (LXR?)/ATP-binding cassette transporter A1 (ABCA1) and PPAR?/scavenger receptor CD36 pathways, as demonstrated by the transfection of PPAR? siRNA or PPAR? expression vector. Our data implied that gossypetin regulated the PPAR signals, which in turn led to stimulation of cholesterol removal from macrophages and delay atherosclerosis. These results suggested that gossypetin potentially could be developed as an anti-atherosclerotic agent.
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Impacts of mitral E/e on myocardial contractile motion and synchronicity in heart failure patients with reduced ejection fraction: An exercise-echocardiography study.
Clin Cardiol
PUBLISHED: 02-20-2013
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The association between diastolic abnormality and postexercise contractile decompensation is uncertain in heart failure (HF) patients with reduced left ventricular ejection fraction (LVEF).
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Genetic variation-optimized treatment benefit of angiotensin-converting enzyme inhibitors in patients with stable coronary artery disease: a 12-year follow-up study.
Pharmacogenet. Genomics
PUBLISHED: 02-15-2013
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The objective of this study was to examine the relationship between renin-angiotensin system genotypes and the pharmacogenetics of angiotensin-converting enzyme (ACE) inhibitors in Chinese patients with coronary artery disease (CAD).
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The contribution of caveolin-1 genotype and phenotype to hepatocellular carcinoma.
Anticancer Res.
PUBLISHED: 02-09-2013
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Hepatocellular carcinoma (HCC) is one of the most common types of malignant tumors worldwide, for which the prevalence and mortality rates are very high in Taiwan. Caveolin-1 (CAV-1) is a main structural protein of caveolae and plays a regulatory role in signaling pathways and tumorigenesis. High expression of Cav-1 in mouse HCC is positively correlated with higher cell invasive capacity, but the contribution of CAV-1 genetic variants during HCC progression is still largely unknown. In this study, we investigated the contribution of CAV-1 variant to the risk of HCC from the analyses of DNA, RNA and proteins.
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The contribution of XRCC6/Ku70 to hepatocellular carcinoma in Taiwan.
Anticancer Res.
PUBLISHED: 02-09-2013
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Hepatocellular carcinoma (HCC) is a neoplasm for which the prevalence and mortality rates are very high in Taiwan. The DNA non-homologous end-joining repair gene XRCC6/Ku70 plays an important role in the repair of DNA double-strand breaks (DSBs) induced by both exogenous and endogenous DNA-damaging agents. Defects in overall DSB repair capacity can lead to genomic instability and carcinogenesis. In this study, we investigated the contribution of variant XRCC6 in relation to the risk of HCC, from the levels of DNA, RNA and protein.
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Osthole Improves Spatial Memory Deficits in Rats via Hippocampal ? 1-Adrenergic and D 1 /D 2 Receptors.
Evid Based Complement Alternat Med
PUBLISHED: 01-29-2013
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The present study evaluated the effect of osthole, an active ingredient isolated from Cnidium monnieri L. Cusson, on spatial memory deficits caused by central neurotoxins using the Morris water maze in rats. The involvement of catecholaminergic receptors on the memory-enhancing effect of osthole in rat hippocampus was further investigated by intrahippocampal injection of catecholaminergic receptor antagonists. Intracisternal injection of osthole (10? ? g/brain) improved the spatial performance and working memory impairments caused by the catecholaminergic neurotoxin 6-hydroxydopamine. No significant differences in swimming speeds were observed among sham, neurotoxin-induced, and osthole-treated groups. Intracisternal osthole injection also attenuated the spatial performance and working memory impairments caused by the ? 1 receptor antagonist phenoxybenzamine, the D1 receptor antagonist SCH 23390, and the D2 receptor antagonist sulpiride. Therefore, we demonstrated that the effect of osthole on improving spatial memory deficits may be related to the activation of hippocampal ? 1 and D1/D2 receptors.
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Isothiocyanates protect against oxidized LDL-induced endothelial dysfunction by upregulating Nrf2-dependent antioxidation and suppressing NF?B activation.
Mol Nutr Food Res
PUBLISHED: 01-21-2013
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Oxidative stress plays a pivotal role in the pathophysiology of cardiovascular diseases. Oxidized low-density lipoprotein (oxLDL) is a key contributor to atherogenesis through multiple mechanisms. In this study, we investigated the protection by three structurally related isothiocyanates, i.e., sulforaphane (SFN), benzyl isothiocyanate (BITC), and phenethyl isocyanate (PEITC), against oxLDL-induced leukocyte adhesion to vascular endothelium and the mechanism involved.
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Soluble ST2 as a biomarker for detecting stable heart failure with a normal ejection fraction in hypertensive patients.
J. Card. Fail.
PUBLISHED: 01-20-2013
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We investigated the measurement of soluble ST2 (sST2) in stable heart failure (HF) with a normal ejection fraction (HFNEF) in hypertensive patients.
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Is fluid overload more important than diabetes in renal progression in late chronic kidney disease?
PLoS ONE
PUBLISHED: 01-01-2013
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Fluid overload is one of the major presentations in patients with late stage chronic kidney disease (CKD). Diabetes is the leading cause of renal failure, and progression of diabetic nephropathy has been associated with changes in extracellular fluid volume. The aim of the study was to assess the association of fluid overload and diabetes in commencing dialysis and rapid renal function decline (the slope of estimated glomerular filtration rate (eGFR) less than -3 ml/min per 1.73 m(2)/y) in 472 patients with stages 4-5 CKD. Fluid status was determined by bioimpedance spectroscopy method, Body Composition Monitor. The study population was further classified into four groups according to the median of relative hydration status (?HS =fluid overload/extracellular water) and the presence or absence of diabetes. The median level of relative hydration status was 7%. Among all patients, 207(43.9 %) were diabetic. 71 (15.0%) subjects had commencing dialysis, and 187 (39.6%) subjects presented rapid renal function decline during a median 17.3-month follow-up. Patients with fluid overload had a significantly increased risk for commencing dialysis and renal function decline independent of the presence or absence of diabetes. No significantly increased risk for renal progression was found between diabetes and non-diabetes in late CKD without fluid overload. In conclusion, fluid overload has a higher predictive value of an elevated risk for renal progression than diabetes in late CKD.
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Medical risk factors associated with cholangiocarcinoma in taiwan: a population-based case-control study.
PLoS ONE
PUBLISHED: 01-01-2013
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Cholangiocarcinoma, including intra- and extrahepatic cholangiocarcinoma, is a rare but highly lethal cancer. Despite effort in finding the risk factors of cholangiocarcinoma, the causes of most cholangiocarcinoma remain unknown. This study utilized a population-based case-control design using data from the National Health Insurance Research Database (NHIRD) of Taiwan to assess the medical conditions associated with cholangiocarcinoma.
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Hypokalemia, its contributing factors and renal outcomes in patients with chronic kidney disease.
PLoS ONE
PUBLISHED: 01-01-2013
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In the chronic kidney disease (CKD) population, the impact of serum potassium (sK) on renal outcomes has been controversial. Moreover, the reasons for the potential prognostic value of hypokalemia have not been elucidated.
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The epidemiology of neuroendocrine tumors in Taiwan: a nation-wide cancer registry-based study.
PLoS ONE
PUBLISHED: 01-01-2013
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The epidemiology of neuroendocrine tumors (NETs) is not well illustrated, particularly for Asian countries.
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Effect of resistance-exercise training on cognitive function in healthy older adults: a review.
J Aging Phys Act
PUBLISHED: 12-20-2011
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Several studies have demonstrated that exercise helps reduce or prevent cognitive deterioration among older adults, and recent studies have further examined the effects of resistance-exercise training on cognition. The purpose of this review was to examine the role of resistance-exercise training on cognition in healthy older adults. Specifically, it describes the definition, health benefits, and the design of resistance-exercise training. The authors also review the research related to resistance exercises and cognition and found that this exercise modality may enhance specific cognitive performances. Next, they examine the potential mechanisms underlying resistance exercise and cognitive enhancement. Finally, they consider potential therapeutics and recommendations for further research on resistance-exercise training and cognition in older adults.
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Baby oil therapy for uremic pruritus in haemodialysis patients.
J Clin Nurs
PUBLISHED: 11-17-2011
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The purpose of this study was to investigate the effectiveness of chilled/un-chilled baby oil therapy for treating uremic pruritus in haemodialysis patients.
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Carnosic acid induces the NAD(P)H: quinone oxidoreductase 1 expression in rat clone 9 cells through the p38/nuclear factor erythroid-2 related factor 2 pathway.
J. Nutr.
PUBLISHED: 10-26-2011
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The anticarcinogenic effect of rosemary has been partly attributed to the modulation of the activity and expression of phase II detoxification enzymes. Here we compared the effects of phenolic diterpenes from rosemary on the expression of NAD(P)H: quinone oxidoreductase 1 (NQO1) in rat Clone 9 liver cells. Cells were treated with 1-20 ?mol/L of carnosic acid (CA) or carnosol (CS) for 24 h. Both CA and CS dose dependently increased NQO1 enzyme activity and protein expression, and the induction potency of CA was stronger than that of CS. The increase in NQO1 enzyme activity in cells treated with 10 ?mol/L CA and CS was 4.1- and 1.9-fold, respectively (P < 0.05). RT-PCR showed that CA and CS induced NQO1 mRNA in a dose-dependent manner. Furthermore, CA dose dependently induced transcription of nuclear factor erythroid-2 related factor 2 (Nrf2) and antioxidant response element (ARE)-luciferase reporter activity. Silencing of Nrf2 expression alleviated NQO1 protein expression and ARE-luciferase activity by CA. Moreover, the phosphorylation of p38 was mainly stimulated in the presence of CA. Pretreatment with SB203580 or silencing of p38 expression inhibited Nrf2 activation and NQO1 induction. These results suggest that the increased NQO1 expression by CA is likely related to the p38-Nrf2 pathway and help to clarify the possible molecular mechanism of action of rosemary phenolic compounds in drug metabolism and cancer prevention.
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Inhibition of TNF-?-Induced Inflammation by andrographolide via down-regulation of the PI3K/Akt signaling pathway.
J. Nat. Prod.
PUBLISHED: 10-25-2011
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Andrographolide (1), an active constituent of Andrographis paniculata, decreased tumor necrosis factor-? (TNF-?)-induced intercellular adhesion molecule-1 (ICAM-1) expression and adhesion of HL-60 cells onto human umbilical vein endothelial cells (HUVEC), which are associated with inflammatory diseases. Moreover, 1 abolished TNF-?-induced Akt phosphorylation. Transfection of an activated Akt1 cDNA vector increased Akt phosphorylation and ICAM-1 expression like TNF-?. In addition, 1 and LY294002 blocked TNF-?-induced I?B-? degradation and nuclear p65 protein accumulation, as well as the DNA-binding activity of NF-?B. Compound 1 exhibits anti-inflammatory properties through the inhibition of TNF-?-induced ICAM-1 expression. The anti-inflammatory activity of 1 may be associated with the inhibition of the PI3K/Akt pathway and downstream target NF-?B activation in HUVEC cells.
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Earthworms repair H2O2-induced oxidative DNA adducts without removing UV-induced pyrimidine dimers.
In Vivo
PUBLISHED: 10-25-2011
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Ultraviolet (UV) radiation is a natural insult to various organisms. Earthworms, although possessing similar biomolecules to those in mammalian skin, do not suffer from skin cancer nor any other types of cancer as humans do. However, little is known about the molecular mechanism of the earthworms tolerance to UV. In this study, we evaluated the genotoxicity of UV and the capacity of earthworm cell to repair UV-induced damage. The T4 UV endonuclease UV-incorporated comet assay was used to examine the excision and rejoining steps of UV-induced pyrimidine dimer. Earthworm testis cells were treated with a combination of 5 mM hydroxyurea plus 50 ?M cytosine-?-D-arabinofuranoside for 6 h to block DNA rejoining capacity and to investigate excision dynamics. Compared with H(2)O(2)-induced oxidative repair capacity, the excision step of repair of UV-induced lesions in earthworm testis cells was significantly lower. After 6-h treatment of 5 mM hydroxyurea plus 50 ?M cytosine-?-D-arabinofuranoside, the medium was totally replaced with fresh medium and cells were allowed to rejoin the accumulated DNA strand breaks. We found that the capacity for rejoining UV-induced breaks was also significantly lower than that for the H(2)O(2)-induced breaks. Our results strongly suggest that earthworms seem to be efficient at repairing H(2)O(2)-induced oxidative DNA adducts, but not so capable of removing UV-induced pyrimidine dimers from their genome.
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Significant association of rs13376333 in KCNN3 on chromosome 1q21 with atrial fibrillation in a Taiwanese population.
Circ. J.
PUBLISHED: 10-22-2011
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A recent study in individuals of European ancestry demonstrated a significant association of the single nucleotide polymorphism (SNP) rs13376333 in potassium intermediate/small conductance calcium-activated channel, subfamily N, member 3 (KCNN3) on chromosome 1q21 with lone atrial fibrillation (AF), indicating a common genetic basis for AF. The aim of the present study was to investigate whether this association between SNP rs13376333 and AF also exists in Taiwanese subjects.
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Association of Alpha B-Crystallin (CRYAB) genotypes with breast cancer susceptibility in Taiwan.
Cancer Genomics Proteomics
PUBLISHED: 10-08-2011
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Alpha B-Crystallin (CRYAB) is purported to be a metastasis suppressor protein, and lack or lower CRYAB expression is a prognostic biomarker for several types of cancer, such as that of the prostate and head and neck. However, the association of genomic variation of CRYAB and breast cancer is not well studied. The aim of this study was to evaluate the association of polymorphic genotypes of CRYAB with breast cancer within a Taiwanese population.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.