糖基化終產(chǎn)物通過其受體激活NADPH氧化酶及其下游通路誘導(dǎo)L細(xì)胞的凋亡
[Abstract]:Aim: to investigate the role of advanced glycation end product (ages) and its receptor (rage) and its downstream signaling pathway in the apoptosis of intestinal L cells (GLUTag). Methods: the expression of rage mRNA and protein was detected by RT-PCR and Western blot after different concentrations of ages were treated on GLUTag cells for 24 h. Then the cells were divided into two groups: BSA control group (ages 200 渭 g / mL) and ages siRNA-rage group (ages apocynin). Apoptosis rate was detected by Annexin V-FITC / Pi, reactive oxygen species (Ros) level was detected by fluorescence probe, phosphorylation level of NADPH oxidase subunit p22 ~ (phox) p47 ~ (phox) and expression of Bcl-2P Bax protein were detected by Western blot. Results the expression of rage mRNA and protein in GLUTag cells was increased in a dose-dependent manner. Compared with the control group, the apoptosis rate of GLUTag cells was significantly increased, and the expression of p22 ~ (phox) oxidase subunit p22 ~ (phox) p47 ~ (phox) was increased, and the intracellular Ros level was increased. The expression of pro-apoptotic protein Bax was up-regulated, and the expression of anti-apoptotic protein Bcl-2 was down-regulated. AGEs siRNA-rage group significantly decreased the expression of p22 ~ (phox) oxidase subunit p22 ~ (phox) p47 ~ (phox), and the intracellular Ros level in AGEs apocynin group. The expression of pro-apoptotic protein Bax was down-regulated and the expression of anti-apoptotic protein Bcl-2 was up-regulated. Conclusion the expression of rage receptor was up-regulated, NADPH oxidase was activated, Ros production was increased and GLUTag apoptosis was induced by p53 / Bax pathway.
【作者單位】: 南方醫(yī)科大學(xué)珠江醫(yī)院內(nèi)分泌科;
【基金】:國家自然科學(xué)基金青年基金項(xiàng)目(編號(hào):81500623) 廣東省科技計(jì)劃項(xiàng)目(編號(hào):2014A020212489)
【分類號(hào)】:R587.1
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