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Find video protocols related to scientific articles indexed in Pubmed.
[Risk factors associated with incisional surgical site infection in colorectal cancer surgery with primary anastomosis].
Zhonghua Wai Ke Za Zhi
PUBLISHED: 09-16-2014
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To investigate the incidence of surgical site infection (SSI) and risk factors in colorectal cancer surgery patients.
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[Functional analysis of Oct4 promoter in Xuhuai goat].
Yi Chuan
PUBLISHED: 08-22-2014
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The aim of this study was to determine the activity region of Oct4 (octamer-binding transcription factor 4) promoter in Xuhuai goat, and to investigate the effect of TSA (trichostatin A) and VPA(valproicacid) on Oct4 promoter activity. Specific PCR primers of Oct4 promoter including different lengths of fragments were designed by Primer 5.0, then were amplified and cloned into PGL3-Bacic luciferase reporter vector. All the reconstruction vectors were transfected into gEF, P19 and COS7 cells, respectively. After TSA and VPA treatment, the activity of dual-luciferase reporter gene in these three transfected cells was detected. In addition, the CMV promoter of pEGFP-N1 was replaced by the -1516?+30 bp fragment of Oct4 promoter, GFP fluorescence was used to detect the activity of Oct4 promoter. The results indicated that different fragments of Oct4 promoter showed different degrees of activity in gEF, P19 and COS7 cells, and the maximal activity region of Oct4 promoter was -1516?+30 bp, the basal activity region was -238?+30 bp. Positive regulatory domains existed in the region of -1516?-946 bp and -615?-96 bp, while negative regulatory domains existed in the region of -1936?-1516 bp and -946?-615 bp. The optimum induction concentration to enhance the activity of Oct4 promoter was 1 ?mol/L of TSA and 4 mmol/L of VPA. The GFP expression can be started by the fragment of -1516?+30 bp. This study provides an experimental basis for revealing the mechanism of expression and regulation of Oct4 in goat.
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MiR99a modulates MMP7 and MMP13 to regulate invasiveness of Kaposi's sarcoma.
Tumour Biol.
PUBLISHED: 07-19-2014
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Matrix metalloproteinases (MMPs) and microRNAs (miRNAs) are associated with Kaposi's sarcoma (KS) tumorigenesis. To date, the molecular basis underlying crosstalk of MMPs and miRNAs in KS remains unexplored. From the resected KS samples, we detected significant correlation of miRNA99a (miR99a), with MMP7 and MMP13, but not with MMP9. To define whether a causal link exists, we used a human KS line, SLK, to study the molecular basis of miR99a and activation of MMP7, MMP9, and MMP13. We found that overexpression of miR99a in SLK cells decreased MMP7 and MMP13, but not MMP9. Similarly, MiR99a inhibition in SLK cells activated MMP7 and MMP13, but did not affect expression of MMP9. These data suggest that MMP7 and MMP13 seem to be regulated by miR99a, while MMP9 seems to be regulated in a miR99a-independent manner. Inhibition of PI3k/Akt signaling pathway significantly abolished the effect of miR99a-knockdown on MMP7, but not MMP13 activation, while inhibition of ERK/MAPK signaling pathway significantly abolished the effect of miR99a-knockdown on MMP13, but not MMP7 activation. Taken together, our data suggest that miR99a inhibits MMP7 and MMP13 through PI3k/Akt and ERK/MAPK signaling pathway, respectively, in KS. Thus, miR99a, MMP7, and MMP13 appear to be promising therapeutic targets for preventing the metastasis of KS.
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Potential spermatogenesis recovery with bone marrow mesenchymal stem cells in an azoospermic rat model.
Int J Mol Sci
PUBLISHED: 06-15-2014
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Non-obstructive azoospermia is the most challenging type of male infertility. Stem cell based therapy provides the potential to enhance the recovery of spermatogenesis following cancer therapy. Bone marrow-derived mesenchymal stem cells (BMSCs) possess the potential to differentiate or trans-differentiate into multi-lineage cells, secrete paracrine factors to recruit the resident stem cells to participate in tissue regeneration, or fuse with the local cells in the affected region. In this study, we tested whether spermatogenically-induced BMSCs can restore spermatogenesis after administration of an anticancer drug. Allogeneic BMSCs were co-cultured in conditioned media derived from cultured testicular Sertoli cells in vitro, and then induced stem cells were transplanted into the seminiferous tubules of a busulfan-induced azoospermatic rat model for 8 weeks. The in vitro induced BMSCs exhibited specific spermatogonic gene and protein markers, and after implantation the donor cells survived and located at the basement membranes of the recipient seminiferous tubules, in accordance with what are considered the unique biological characteristics of spermatogenic stem cells. Molecular markers of spermatogonial stem cells and spermatogonia (Vasa, Stella, SMAD1, Dazl, GCNF, HSP90?, integrin?1, and c-kit) were expressed in the recipient testis tissue. No tumor mass, immune response, or inflammatory reaction developed. In conclusion, BMSCs might provide the potential to trans-differentiate into spermatogenic-like-cells, enhancing endogenous fertility recovery. The present study indicates that BMSCs might offer alternative treatment for the patients with azoospermatic infertility after cancer chemotherapy.
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Connexin 43 expression in Sprague-Dawley rat seminiferous epithelium after in utero exposure to flutamide.
Syst Biol Reprod Med
PUBLISHED: 05-27-2014
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This study explored the expression of connexin 43 (Cx43) in the testes of prepubertal Sprague-Dawley (SD) rats following in utero flutamide (Flu) exposure. Connexins constitute the major protein type in gap junctions. Connexin 43, the most prominent connexin family member expressed by testes, is localized at the base of seminiferous tubules in humans and rodents, and may be involved in fertility. Flutamide was injected subcutaneously into pregnant SD rats on gestational days 12-21 (25?mg/kg/day). Immunohistochemistry, Western blotting, and real-time PCR was used to investigate the distribution and the expression of Cx43 protein and mRNA in the testis on postnatal day 20 (PD20). Following Flu-exposure, Cx43 was observed between Sertoli cells in the seminiferous tubules. On PD20, no Cx43 protein was expressed by the spermatogonial cell layer of the seminiferous tubules in the controls, but was observed in the Flu-exposed group. Western blotting showed that Cx43 was expressed at significantly lower levels in Flu-exposed testes than controls on PD20 (p?
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[A prospective multicenter clinical trial of extralevator abdominoperineal excision for locally advanced low rectal cancer].
Zhonghua Wai Ke Za Zhi
PUBLISHED: 04-05-2014
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To demonstrate the feasibility of extralevator abdominoperineal excision (ELAPE) for locally advanced low cancer in China.
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Characterization of constitutive promoters for piggyBac transposon-mediated stable transgene expression in mesenchymal stem cells (MSCs).
PLoS ONE
PUBLISHED: 01-01-2014
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Multipotent mesenchymal stem cells (MSCs) can undergo self-renewal and give rise to multi-lineages under given differentiation cues. It is frequently desirable to achieve a stable and high level of transgene expression in MSCs in order to elucidate possible molecular mechanisms through which MSC self-renewal and lineage commitment are regulated. Retroviral or lentiviral vector-mediated gene expression in MSCs usually decreases over time. Here, we choose to use the piggyBac transposon system and conduct a systematic comparison of six commonly-used constitutive promoters for their abilities to drive RFP or firefly luciferase expression in somatic HEK-293 cells and MSC iMEF cells. The analyzed promoters include three viral promoters (CMV, CMV-IVS, and SV40), one housekeeping gene promoter (UbC), and two composite promoters of viral and housekeeping gene promoters (hEFH and CAG-hEFH). CMV-derived promoters are shown to drive the highest transgene expression in HEK-293 cells, which is however significantly reduced in MSCs. Conversely, the composite promoter hEFH exhibits the highest transgene expression in MSCs whereas its promoter activity is modest in HEK-293 cells. The reduced transgene expression driven by CMV promoters in MSCs may be at least in part caused by DNA methylation, or to a lesser extent histone deacetlyation. However, the hEFH promoter is not significantly affected by these epigenetic modifications. Taken together, our results demonstrate that the hEFH composite promoter may be an ideal promoter to drive long-term and high level transgene expression using the piggyBac transposon vector in progenitor cells such as MSCs.
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Peroxiredoxin I protein, a potential biomarker of hydronephrosis in fetal mice exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin.
J Pediatr Urol
PUBLISHED: 06-27-2013
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In previous studies, we established an animal model of human congenital hydronephrosis with exposure of developing mice to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), but the etiopathogenesis is not entirely clear. The present study was to identify the changes that may be involved in the etiology at the protein level.
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[Be based on the morphological and histological changes to study optimal dose of TCDD induced cleft palate in mice embryo].
Wei Sheng Yan Jiu
PUBLISHED: 05-10-2013
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To define the optimal 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD) dose based on the morphological and histological changes of fetal mice cleft palate induced by different TCDD doses.
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c-Jun N-terminal kinase is upregulated in patients with hypospadias.
Urology
PUBLISHED: 01-01-2013
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To investigate the expression of c-Jun N-terminal kinase (JNK) 1/2 in human hypospadiac tissue compared with that in normal penile tissue.
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Ultrasound microbubble-mediated delivery of the siRNAs targeting MDR1 reduces drug resistance of yolk sac carcinoma L2 cells.
J. Exp. Clin. Cancer Res.
PUBLISHED: 08-23-2011
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MDR1 gene encoding P-glycoprotein is an ATP-dependent drug efflux transporter and related to drug resistance of yolk sac carcinoma. Ultrasound microbubble-mediated delivery has been used as a novel and effective gene delivery method. We hypothesize that small interfering RNA (siRNA) targeting MDR1 gene (siMDR1) delivery with microbubble and ultrasound can down-regulate MDR1 expression and improve responsiveness to chemotherapeutic drugs for yolk sac carcinoma in vitro.
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Management of blunt renal trauma: an experience in 84 children.
Int Urol Nephrol
PUBLISHED: 04-05-2011
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The study aimed to investigate the method of management and diagnosis of pediatric blunt renal trauma, and determine whether all grades of hemodynamically stable injuries can be managed conservatively.
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The first case of renal lipoma in a child.
J. Pediatr. Surg.
PUBLISHED: 03-13-2011
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Lipoma of the kidney is a rare benign renal tumor that previously had been reported only in adults. We present a case of this tumor in a 2-year-old boy. Serial imaging studies revealed a tumor with high fat content arising from the right kidney. Radical nephrectomy was performed for tumor excision. Macroscopically, the tumor consisted of a yellow fatty mass, which was surrounded by a thin fibrous capsule. The tumor was about 600 g, and the kidney was compressed laterally by the tumor. Microscopically, the tumor consisted of large fat cells that did not express human melanoma black-45 (HMB-45). It was diagnosed as a renal lipoma. Postoperatively, there has been no recurrence of tumor in the 10 months since the surgical excision.
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Propofol induces neuronal apoptosis in infant rat brain under hypoxic conditions.
Brain Res. Bull.
PUBLISHED: 02-18-2011
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Propofol is currently one of the most widely used intravenous anesthetic. In the present study, we investigated the effects of propofol on neuropathogenesis in newborn rats under hypoxic conditions. Seven-day old SD rats were assigned into one of the six treatments: propofol+50% oxygen (propofol-oxygen, PO), propofol+room air (propofol-air, PA), propofol+18% oxygen (propofol-hypoxia, PH), control group: lipid emulsion solvent+50% oxygen (CO), lipid emulsion solvent+room air (CA), lipid emulsion solvent+18% oxygen (CH). The rats assigned to anesthesia or control groups received intraperitoneally (ip) propofol 50 mg/kg or identical volume of lipid emulsion solvent (5.0 ml/kg) for seven days. SaO(2) (%) and respiratory rate (RR) were monitored throughout the procedures. The rats were decapitated 24h after 7 days exposure. TUNEL staining, Nissl staining, ultrastructural changes and the expression of caspase-3 in the brain tissues were assessed. We found propofol-induced attenuation of respiration could produce lower oxygen concentrations in the blood (hypoxia) under air or mild hypoxia conditions. Interestingly, in the presence of oxygen completely rescued hypoxia to normal levels, suggesting that propofol-induced respiratory depression led to hypoxia only under air or mild hypoxic conditions (propofol/hypoxia). In addition, propofol indirectly induced apoptosis through hypoxia resulting from respiratory depression under air or hypoxic conditions, which was determined by elevated expression of caspase-3, increased TUNEL-positive cells, ultrastructural changes of neuronal cell death and loss of Nissl staining neuronal in infant SD rat brains. However, in propofol-oxygen group and all control groups, no significant apoptosis were observed. These findings indicated that propofol per se or hypoxia per se did not directly induce significant apoptosis. However, propofol-induced attenuation of respiration could produce lower oxygen concentrations in the blood under air or mild hypoxia conditions and thereby result in neuronal degeneration. So, it is important to supply with supplementary oxygen during propofol anesthesia.
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Role of nitric oxide synthase in bladder pathologic remodeling and dysfunction resulting from partial outlet obstruction.
Urology
PUBLISHED: 01-22-2011
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To investigate the relationship between nitric oxide synthase (NOS) and oxidative stress and pathologic remodeling in the partial obstructed bladder of a rat model.
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Dynamic effect of di-2-(ethylhexyl) phthalate on testicular toxicity: epigenetic changes and their impact on gene expression.
Int. J. Toxicol.
PUBLISHED: 03-26-2010
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This study investigated epigenetic (specifically, DNA methylation) changes and their impact on gene expression in testes induced by maternal exposure to Di-2-(ethylhexyl) phthalate (DEHP) in mice. Testicular dysgenesis syndrome was induced in fetuses and pups by maternal exposure to DEHP at 500 mg/kg/d, and testes were excised for analysis on gestation day (GD) 19 and postnatal days (PNDs) 3, 21, 56, and 90. High-performance liquid chromatography (HPLC) was performed to analyze DNA methylation status, and expression levels of the DNA methyltransferases were examined by quantitative real-time polymerase chain reaction (qPCR). Testis-specific gene, insulin-like hormone 3 (Insl3), and testosterone production were also detected. DEHP significantly increased DNA methylation levels on GD 19 and PND 3 (P < .05 and P < .05) but not on PNDs 21, 56, and 90. DEHP also significantly increased the expression of DNA methyltransferases. For DNA methyltransferase 1, the difference was not significant on PND 21, and DNA methyltransferase 3a and 3b returned to normal levels on PND 56. Fetal testes were a main target for DEHP as evidenced by a reduction in Insl3 expression and testosterone production. Effects of DEHP on Insl3 expression continued until PND 21. The DEHP-induced suppression of testosterone had not recovered on PND 56. Changes in DNA methylation may play an important role in abnormal testicular function caused by environmental factors such as maternal exposure to DEHP, which may be a mechanism of DEHP-mediated testicular toxicity.
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Uncommon pediatric painless scrotal masses: a puzzle of pediatricians and urologists.
Int Urol Nephrol
PUBLISHED: 01-06-2010
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A broad spectrum of scrotal pathologies, including tumors, malformations, and inflammation, can present as painless scrotal masses in the pediatric age groups. The aim of our single institutional retrospective study was to survey data regarding uncommon painless scrotal masses collected over the past 22 years in order to better diagnose and treat these pathologies.
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Dynamic epigenetic changes involved in testicular toxicity induced by di-2-(ethylhexyl) phthalate in mice.
Basic Clin. Pharmacol. Toxicol.
PUBLISHED: 11-11-2009
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The aim of this study was to analyse epigenetic (specifically, DNA methylation) change in testes induced by maternal exposure to di-2-(ethylhexyl) phthalate (DEHP) in mice. Testicular dysgenesis syndrome was induced in foetuses by maternal exposure to DEHP. High-performance liquid chromatography was performed to analyse DNA methylation status, and expression levels of the DNA methyltransferases were examined by quantitative real-time polymerase chain reaction and western blotting. DEHP significantly had more than 10% relative increase in the global DNA methylation and also increased DNA methyltransferases expression. Changes in DNA methylation may play an important role in abnormal testicular function caused by environmental factors such as maternal exposure to DEHP, which may be one possible mechanism of DEHP-mediated testicular toxicity.
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Dose-related effect by maternal exposure to di-(2-ethylhexyl) phthalate plasticizer on inducing hypospadiac male rats.
Environ. Toxicol. Pharmacol.
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The aim of this study was to evaluate dose-related effects on external genitalia of adult male offspring rats by maternal exposure to di-(2-ethylhexyl) phthalate (DEHP) plasticizer. Timed-pregnant rats were given DEHP by gastric intubation at doses of 0, 500, 750 or 1000mg/kg body weight/day from gestation day 12-19 to establish a hypospadiac rat model. The hypospadias was observed and the incidence in three DEHP dosage levels was 10.7%, 30.6% and 37.0%, respectively. With exposed dose increased, mild, moderate and severe hypospadiac rats were distinguished and an increased incidence of severe hypospadias was observed. The other reproductive lesions like reduced penile length and anogenital distance/body weight were observed. The results indicated the dose-related external genitalia teratogenic toxicity, and graded hypospadias on male offspring was resulted from high dosage DEHP maternal exposure.
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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.