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Find video protocols related to scientific articles indexed in Pubmed.
Performance of diatomite/iron oxide modified nonwoven membrane used in membrane bioreactor process for wastewater reclamation.
Water Sci. Technol.
PUBLISHED: 08-08-2014
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This study describes an approach for surface modification of a nonwoven membrane by diatomite/iron oxide to examine its filterability. Analysis results showed that nonwoven hydrophilicity is enhanced. Static contact angle decreases dramatically from 122.66° to 39.33°. Scanning electron micrograph images show that diatomite/iron oxide is attached on nonwoven fiber. X-ray diffraction analysis further proves that the compound is mostly magnetite. Fourier transformed infrared spectra results reveal that two new absorption peaks might be attributed to Si-O and Fe-O, respectively. Modified and original membranes were used in double nonwoven membrane bioreactors (MBRs) for synthetic wastewater treatment. High critical flux, long filtration time, slow trans-membrane pressure rise and stable sludge volume index confirmed the advantages of modified nonwoven. Comparing with original nonwoven, similar effluent qualities are achieved, meeting the requirements for wastewater reclamation.
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Identification of microRNAs in six solanaceous plants and their potential link with phosphate and mycorrhizal signalings.
J Integr Plant Biol
PUBLISHED: 05-14-2014
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To date, only a limited number of solanaceous miRNAs have been deposited in the miRNA database. Here, genome-wide bioinformatic identification of miRNAs was performed in six solanaceous plants (potato, tomato, tobacco, eggplant, pepper, and petunia). A total of 2,239 miRNAs were identified following a range of criteria, of which 982 were from potato, 496 from tomato, 655 from tobacco, 46 from eggplant, 45 were from pepper, and 15 from petunia. The sizes of miRNA families and miRNA precursor length differ in all the species. Accordingly, 620 targets were predicted, which could be functionally classified as transcription factors, metabolic enzymes, RNA and protein processing proteins, and other proteins for plant growth and development. We also showed evidence for miRNA clusters and sense and antisense miRNAs. Additionally, five Pi starvation- and one arbuscular mycorrhiza (AM)-related cis-elements were found widely distributed in the putative promoter regions of the miRNA genes. Selected miRNAs were classified into three groups based on the presence or absence of P1BS and MYCS cis-elements, and their expression in response to Pi starvation and AM symbiosis was validated by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). These results show that conserved miRNAs exist in solanaceous species and they might play pivotal roles in plant growth, development, and stress responses.
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Deuterohemin-AlaHisLys mitigates the symptoms of rats with non-insulin dependent diabetes mellitus by scavenging reactive oxygen species and activating the PI3-K/AKT signal transduction pathway.
Chem. Biol. Interact.
PUBLISHED: 04-10-2014
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Damage to pancreatic ?-cells plays an important role in the development of type 2 diabetes, and oxidative stress is a likely contributor. In the present study, we investigated the effect of deuterohemin-AlaHisLys (DhHP-3), a microperoxidase-11 mimic, on rats with non-insulin dependent diabetes mellitus and examined the action mechanisms of DhHP-3. The induced hyperglycemia, glucose intolerance, and insulin resistance in diabetic rats were associated with increased oxidative stress and damage to pancreatic islets. DhHP-3 (3mg/kg) ameliorated hyperglycemia and insulin resistance, protected pancreas islet, decreased the content of malondialdehyde, and increased the activity of superoxide dismutase in plasma and pancreatic tissue by reducing ROS levels. Furthermore, DhHP-3 stimulated the proliferation of INS-1 cells and inhibited apoptosis by activating the phosphatidylinositol 3-kinase/protein kinase B (PI3-K/AKT) signaling pathway. Our results demonstrated for the first time that DhHP-3 decreased blood glucose level in rats with non-insulin dependent diabetes mellitus, scavenged reactive oxygen species, activated the PI3-K/AKT signaling pathway, and protected pancreatic ?-cells against apoptosis.
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Red yeast rice repairs kidney damage and reduces inflammatory transcription factors in rat models of hyperlipidemia.
Exp Ther Med
PUBLISHED: 03-04-2014
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Xuezhikang (XZK), an extract of red yeast rice, has been widely used for the management of hyperlipidemia and coronary heart disease (CHD); however, the effects of XZK treatment on kidney injury have not yet been fully identified. The aim of the current study was to evaluate the effects of XZK on the kidneys and investigate the related mechanisms in a rat model of hyperlipidemia. Thus, the effect on inflammatory transcription factors and kidney damage was investigated with in vitro and in vivo experiments on hyperlipidemic rats following XZK treatment. The results revealed that the plasma levels of total cholesterol (TC), triglycerides (TG) and low-density lipoprotein-cholesterol (LDL-C) were significantly decreased, while the levels of high-density lipoprotein-cholesterol (HDL-C) were significantly upregulated in the XZK treatment group, as compared with those in the hyperlipidemia group (P<0.05). In addition, the results demonstrated that XZK was able to repair the kidney damage caused by hyperlipidemia. Furthermore, the expression levels of the inflammatory transcription factors, tumor necrosis factor-? and interleukin-6, were shown to be reduced in the XZK group when compared with the hyperlipidemia group. In summary, XZK reduces kidney injury, downregulates the levels of TG, TC and LDL-C, as well as the expression levels of inflammatory transcription factors, and upregulates HDL-C. These results further the understanding of the molecular pathogenic mechanisms underlying hyperlipidemia and aid the development of XZK as an effective therapeutic agent for hyperlipidemia.
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Postconditioning ameliorates mitochondrial DNA damage and deletion after renal ischemic injury.
Nephrol. Dial. Transplant.
PUBLISHED: 09-10-2013
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Reactive oxygen species (ROS) play a major role in causing injury in ischemia-reperfusion (I/R). Mitochondrial DNA (mtDNA) is particularly vulnerable to oxidative damage. We propose that increased mitochondrial ROS production is likely to damage mtDNA, causing further injury to mitochondria, and postconditioning (POC) may ameliorate kidney I/R injury by mitigating mitochondrial damage.
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HMGB1 combining with tumor-associated macrophages enhanced lymphangiogenesis in human epithelial ovarian cancer.
Tumour Biol.
PUBLISHED: 08-22-2013
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Within tumor microenvironment, high-mobility group box protein 1 (HMGB1) and tumor-associated macrophages (TAMs) are able to influence ovarian cancer development and progression via facilitating tumor lymphatic metastasis. However, little is known about the association between HMGB1 and TAMs on lymphangiogenesis in epithelial ovarian cancer (EOC). To investigate the effect of HMGB1 and TAMs on lymphangiogenesis in EOC, immunohistochemistry was performed to determine the expressions of HMGB1, TAMs, and lymphatic vessel density (LVD) in a total of 108 ovarian tissue specimens. Then, the relationships between HMGB1 or TAMs and LVD were assessed by correlation test. In our in vitro study, TAMs were isolated from ascites of EOC patients. Effects of HMGB1, TAMs, and HMGB1 combining with TAMs on lymphatic endothelial cell (LEC) proliferation, migration, and the capillary-like tube formation were measured. Results showed that the expression of HMGB1 and the number of TAMs infiltration were overexpressed in malignant ovarian tumors compared with that in normal ovarian and were closely associated with lymph node metastasis. Positive correlations existed between HMGB1 expression or TAMs count and LVD determination. In an in vitro study, data demonstrated that either HMGB1 or TAMs could facilitate lymphangiogenesis by inducing LEC proliferation, migration, and capillary-like tube formation. Meanwhile, HMGB1 combining with TAMs may augment the pro-lymphangiogenic property. Our data suggest that either HMGB1 or TAMs could facilitate lymphangiogenesis, while HMGB1 coculture with TAMs may strengthen the pro-lymphangiogenic potential, which may serve as a therapeutic target for ovarian cancer.
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Understanding the drug resistance mechanism of hepatitis C virus NS3/4A to ITMN-191 due to R155K, A156V, D168A/E mutations: a computational study.
Biochim. Biophys. Acta
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ITMN-191 (RG7227, Danoprevir), as a potential inhibitor of the NS3/4A protease of hepatitis C virus, has been in phase 2 clinical trial. Unfortunately, several ITMN-191 resistance mutants including R155K, A156V, and D168A/E have been identified.
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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.

How does it work?

We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

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.