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Samadi Mitra Beigi Laleh Yadegari Fatemeh Ansari Alireza Madjid Majidzadeh-A Keivan Eskordi Maryam Farahmand Leila 《Genetica》2022,150(5):289-297
Genetica - Although predicting the effects of variants near intron-exon boundaries is relatively straightforward, predicting the functional Exon Splicing Enhancers (ESEs) and the possible effects... 相似文献
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Ale-Ebrahim Mahsa Rahmani Raziyeh Faryabi Kousar Mohammadifar Niloofar Mortazavi Pejman Karkhaneh Leyla 《Molecular biology reports》2022,49(5):3433-3443
Molecular Biology Reports - The effects of trans-chalcone on atherosclerosis and NAFLD have been investigated. However, the underlying molecular mechanisms of these effects are not completely... 相似文献
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Simplified method for the collection, storage, and comet assay analysis of DNA damage in whole blood
Al-Salmani K Abbas HH Schulpen S Karbaschi M Abdalla I Bowman KJ So KK Evans MD Jones GD Godschalk RW Cooke MS 《Free radical biology & medicine》2011,51(3):719-725
Single-cell gel electrophoresis (comet assay) is one of the most common methods used to measure oxidatively damaged DNA in peripheral blood mononuclear cells (PBMC), as a biomarker of oxidative stress in vivo. However, storage, extraction, and assay workup of blood samples are associated with a risk of artifactual formation of damage. Previous reports using this approach to study DNA damage in PBMC have, for the most part, required the isolation of PBMC before immediate analysis or freezing in cryopreservative. This is very time-consuming and a significant drain on human resources. Here, we report the successful storage of whole blood in ~ 250 μl volumes, at − 80 °C, without cryopreservative, for up to 1 month without artifactual formation of DNA damage. Furthermore, this blood is amenable for direct use in both the alkaline and the enzyme-modified comet assay, without the need for prior isolation of PBMC. In contrast, storage of larger volumes (e.g., 5 ml) of whole blood leads to an increase in damage with longer term storage even at − 80 °C, unless a cryopreservative is present. Our “small volume” approach may be suitable for archived blood samples, facilitating analysis of biobanks when prior isolation of PBMC has not been performed. 相似文献
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Hashemi M Hoseini H Yaghmaei P Moazeni-Roodi A Bahari A Hashemzehi N Shafieipour S 《DNA and cell biology》2011,30(8):569-575
Genetic and environmental factors are important for the development of nonalcoholic fatty liver disease (NAFLD). The aim of the present study was to examine the single nucleotide polymorphism (SNP) -129C/T (rs17883901) in glutamate-cysteine ligase catalytic subunit (GCLC) and SNPs I128T (rs3816873) and Q95H (rs61733139) in microsomal triglyceride transfer protein (MTTP) in NAFLD. Eighty-three patients with a diagnosis of NAFLD and 93 healthy subjects were included in the study. Tetra amplification refractory mutation system-polymerase chain reaction was designed to detect the SNPs. There were no significant differences in the polymorphism of -129C/T (rs17883901) of the GCLC gene among NAFLD and control groups (p?>?0.05). A significant difference was observed between NAFLD and control group regarding the SNP I128T (rs3816873) in the coding region of the MTTP gene (p?0.05). The CT genotype increased susceptibility to NAFLD (OR: 2.467; 95% CI: 1.253-4.854; p?=?0.008). No significant difference was found among the groups regarding the SNP in the coding region of MTTP gene Q95H (rs61733139). In conclusion, MTTP rs3816873 polymorphism might be a candidate to determine susceptibility to NAFLD. Larger studies are necessary to confirm these findings in various populations. 相似文献
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Liat Bahari Yuval Gilad Ilya Borovok Hamutal Kahel-Raifer Bareket Dassa Yakir Nataf Yuval Shoham Raphael Lamed Edward A. Bayer 《Journal of industrial microbiology & biotechnology》2011,38(7):825-832
The composition of the cellulase system in the cellulosome-producing bacterium, Clostridium thermocellum, has been reported to change in response to growth on different carbon sources. Recently, an extensive carbohydrate-sensing
mechanism, purported to regulate the activation of genes coding for polysaccharide-degrading enzymes, was suggested. In this
system, CBM modules, comprising extracellular components of RsgI-like anti-σ factors, were proposed to function as carbohydrate
sensors, through which a set of cellulose utilization genes are activated by the associated σI-like factors. An extracellular module of one of these RsgI-like proteins (Cthe_2119) was annotated as a family 10 glycoside
hydrolase, RsgI6-GH10, and a second putative anti-σ factor (Cthe_1471), related in sequence to Rsi24, was found to contain
a module that resembles a family 5 glycoside hydrolase (termed herein Rsi24C-GH5). The present study examines the relevance
of these two glycoside hydrolases as sensors in this signal-transmission system. The RsgI6-GH10 was found to bind xylan matrices
but exhibited low enzymatic activity on this substrate. In addition, this glycoside hydrolase module was shown to interact
with crystalline cellulose although no hydrolytic activity was detected on cellulosic substrates. Bioinformatic analysis of
the Rsi24C-GH5 showed a glutamate-to-glutamine substitution that would presumably preclude catalytic activity. Indeed, the
recombinant module was shown to bind to cellulose, but showed no hydrolytic activity. These observations suggest that these
two glycoside hydrolases underwent an evolutionary adaptation to function as polysaccharide binding agents rather than enzymatic
components and thus serve in the capacity of extracellular carbohydrate sensors. 相似文献
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Polymer films of sago starch/polyvinyl alcohol (PVA) were prepared by casting and cured under ultra violet (UV) radiation. Different blends were made varying the concentration of sago starch and PVA. Tensile strength (TS) and elongation at break (Eb) of the prepared films were studied. Films made up of sago starch and PVA with a ratio of 1:2 showed the highest TS and Eb. The physico-mechanical properties of prepared films were improved by grafting with acrylic monomers with the aid of UV radiation. A series of formulations was prepared with two monomers 2-ethyl 2-hydroxymethyl 1,3 methacrylate (EHMPTMA) and 2-ethylhexylacrylate (EHA) and a photoinitiator. Monomer concentration, soaking time and radiation dose were optimized in terms of grafting and mechanical properties. The highest TS was at 50% EHMPTMA and 48% EHA and 2% photo initiator at 5 min soaking time and recorded value was 6.58 MPa. The prepared films were further characterized with NMR spectroscopy and scanning electron microscope (SEM). 相似文献
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Amoli MM Amiri P Alborzi A Larijani B Saba S Tavakkoly-Bazzaz J 《Molecular biology reports》2012,39(9):8595-8599
To assess the expression of vascular endothelium growth factor (VEGF) mRNA in unstimulated peripheral blood mononuclear cells of patients with and without coronary artery disease (CAD). We also studied whether the functional VEGF -2,578C/A polymorphism may influence the level of VEGF mRNA expression in individuals undergoing coronary angiography because chest pain. We assessed 50 consecutive patients with angiographically confirmed CAD (CAD+). Also, 50 consecutive individuals with normal coronary studies were included in the study for comparison. VEGF mRNA expression was examined using quantitative real-time PCR and genotyping for VEGF -2,578C/A was performed using ARMS-PCR technique. VEGF mRNA expression was significantly decreased in CAD+ patients when compared to CAD- individuals (p = 0.01). The frequency of VEGF -2578 allele C and genotype CC was increased in CAD+ patients. In this regard, homozygosity for the CC genotype was more commonly observed in CAD+ (30 %) than in those without CAD disease (18 %). However, the difference was slightly out of the range of significance (p = 0.1). In addition, a trend for reduction in the expression of VEGF mRNA was observed when patients carrying the VEGF -2,578AA genotype were compared with those VEGF -2,578AC heterozygous or those homozygous for the VEGF -2,578CC genotype. VEGF gene expression is decreased in individuals with CAD+ disease. The VEGF -2,578C/A polymorphism may influences the expression of VEGF. 相似文献