کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8335753 | 1540282 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Green tea polysaccharide-conjugates protect human umbilical vein endothelial cells against impairments triggered by high glucose
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کلمات کلیدی
HUVEHPGPCFCSDMEMTFA3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide - 3- (4،5-dimethylthiazol-2-yl) -2،5-difenyltetrazolium bromideBSA - BSADulbecco's modified Eagle Medium - Eagle Medium اصلاح شده DulbeccoMTT - MTTbovine serum albumin - آلبومین سرم گاوTrifluoroacetic acid - اسید TrifluoroaceticHuman umbilical vein endothelial - اندوتلیال ورید انسانی انسانیDiabetes - بیماری قندROS scavenging - ریختن ROSfetal calf serum - سرم گوساله جنینVascular complications - عوارض عروقیGreen tea - چای سبزhigh glucose - گلوکز بالا یا قند بالا
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Hot-water extracts of low-grade green tea were precipitated with ethanol, deproteinized with trichloroacetic acid, neutralized with NaOH and fractionated by DEAE-cellulose DE-52 column chromatography to yield three (3) of unexplored polysaccharide-conjugate fractions termed gTPC1, gTPC2 and gTPC3. Monosaccharide and amino acid composition, contents of total neutral sugars, proteins and moistures, HPGPC distribution and Zeta potentials of gTPC1-3 were investigated. Exposure of human umbilical vein endothelial (HUVE) cells to high glucose (33 mM) for 12 h significantly decreased cell viability relative to normal glucose control (p < 0.001). As compared with cell injury group, gTPC1-3 at all of three dose levels (50, 150 and 300 μg/mL) were found to possess remarkably protective effects on HUVE cells against impairments induced by high glucose in a dose-dependent manner (p < 0.05, p < 0.001). To contribute toward our understanding of the cell-based protection mechanism of gTPC1-3, the latter were subjected to self-oxidation of 1,2,3-phentriol assay, and their scavenging effects were observed as 55.1%, 47.6% and 47.9% at the concentration of 300 μg/mL, respectively. On the basis of the fact that high glucose-induced endothelial dysfunction involves in the overproduction of reactive oxygen species (ROS) and contributes to the vascular complications in patients with diabetes, inhibitory effects of gTPC1-3 on high glucose-mediated HUVE cell loss are, at least in part, correlated with their potential scavenging potency of ROS. Taken together, gTPC1-3 could be developed as non-cytotoxic candidates of therapeutic agent for diabetic vascular complications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 49, Issue 1, 1 July 2011, Pages 50-54
Journal: International Journal of Biological Macromolecules - Volume 49, Issue 1, 1 July 2011, Pages 50-54
نویسندگان
Xiaoqiang Chen, Yuefei Wang, Yalin Wu, Baoyu Han, Yuejin Zhu, Xiaolin Tang, Qinglei Sun,