Endocrine Abstracts

Elongation factor, RNA polymerase II, 2 (ELL2) is an RNA Pol II elongation factor with functional properties similar to ELL that can interact with the prostate tumor suppressor ELL-associated factor 2 (EAF2). In murine models, deletion of Ell2 induced prostate intraepithelial neoplasia similar to that induced by deletion of Eaf2. Since ELL2 and EAF2 can functionally interact and appear to have similar function in regulating prostate homeostasis, we investigated the impact of c...

Background: Hyperglycemia and glucose intolerance are perhaps the most common pathophysiologies associated with diabetes. β-Arrestin 2, component of G-protein coupled receptor signaling, has been shown to be down-regulated in insulin resistant and type 2 diabetic mouse models. However, if this down-regulation also existed in diabetic humans, and the possible mechanisms of this differential expression in normal and type 2 diabetes were not clear.Meth...

Objective: To investigate the effect of grape procyanidins(GPC) on proliferation and apoptosis of normal pancreas beta cells and the oxygen injury cells. Method: The cultured pancreas beta cells(BRIN-BD11) were transferred to 12-well plates. Cells were divided into two groups: oxygen injury and no oxygen injury. (1) Oxygen injury cells were damaged by 100 micromoles per litre H2O2 after pretreatment of 50 milligrams per litre,100 milligrams per litre ...

Aim: This study was to investigate the protective effect of grape procyanidins on ethanol and carbon tetrachloride induced cell damages in MC3T3-E1 osteoblast-like cells.Methods: Normal MC3T3-E1 osteoblast-like cells and cells damaged by ethanol or carbon tetrachloride were incubated with different doses of grape procyanidins for 24 hours. Cell TNF alpha mRNA expression and apoptotic DNA fragmentation were subsequently determined using in situ hyb...

Aim: To determine if the endogenous estrogen 17beta-estradiol protected against oxidative stress-induced endothelial cell damage and the mechanism of this potential effect.Methods: Human umbilical vein endothelial cells were isolated and cultured in phenol red free media with 2% charcoal-stripped serum. The following were undertaken (1) Cells were exposed to 0.1 to 1 nM 17beta-estradiol immediately prior to 100 μM hydrogen peroxide added for 24 hour...

Background Somatostatin has various biological effects such as modulation of exocrine and endocrine secretions, proliferation and apoptosis. These effects have been shown to be mediated via G-protein linked receptors known as somatostatin receptors 1-5 (SST 1-5). It has been shown that SST 2 in particular can be modulated by estrogen. The phytoestrogen genistein acts through the estrogen receptor beta and has been shown to have opposing effects on cell proliferation at differe...

Objective: To study the protective effect of grape procyanidins on hydrogen peroxide induced oxidative damage in MC3T3-E1 osteoblast-like cells. Methods: Cultured MC3T3-E1 Osteoblast-like cells were treated with grape procyanidins and 125 micromole per litre hydrogen peroxide for six hours. The levels of apoptosis, mitochondrial transmembrane potential and proliferation were subsequently analyzed by flow cytometry and Bio-Red model 550 instrument. Results: The proliferation le...

SOM230 is one of the long-acting somatostatin analogues, which has been developed for the treatment of neuroendocrine tumours. Recently we found that SOM230 inhibits the proliferation of human umbilical vein endothelial cells (HUVECs). The aim of this study is to further investigate its antiproliferative effect using adult human aortic endothelial cells (HAECs) and human dermal microvessel endothelial cells (HDMECs). The expression of SSTRs and the potential mechanism were obs...

Mesenchymal stem cell (MSC), as a significant part of regenerative medicine, has been considered as a promising therapy in several diseases. Recently, the secretion effect of MSCs has been found to play a key role in the regulation of inflammatory. Here, we screened different peptides with high expression abundance by mass spectrometry from the supernatant of human umbilical cord MSCs. Also, we identified a peptide (AQTKRLVGDVLLATAFLSYSGP) named MSC-P2 derived from dynein axon...

Many evidences have shown that the beneficial effect of statins on the cardiovascular disease may be not only due to their cholesterol-lowering, but also may result from their non-lipid related effects, such as the improvement of endothelial function, the inhibition of smooth muscle proliferation, etc\. Here we investigated the effect of fluvastatin on H2O2-induced oxidative cell damage and the underlying mechanism in human umbilical vein endothelial cell...