miR-183表达失衡诱导子宫内膜细胞抵抗失巢凋亡的作用及分子机制研究
[Abstract]:Objective: to investigate the difference of miR-183 expression between eutopic and ectopic endometrial cells in patients with endometriosis (Endometriosis,EMT), explore the possible target genes of miR-183, and screen specific target genes for preliminary verification. To analyze the molecular mechanism of miR-183 and its target gene regulating endometrial cell apoptosis in order to reveal the pathogenesis of endometriosis. Methods: 1 the eutopic endometrium and ectopic endometrium of EMT patients and the endometrium without EMT were collected as control tissues. 2Morphology was studied by hematoxylin eosin staining (HE staining) in the experimental group (31 patients with eutopic endometrium and ectopic lesions of EMT) and in the control group (32 patients without endometriosis). TUNEL staining and mitochondrial reactive oxygen species (Ros) were used to detect the apoptosis of tissue samples and to compare the apoptotic index (apoptosis index,AI) between the two groups. 3The expression of miR-183 was detected by Real time PCR, and the difference between the two groups was analyzed. 4 the target gene of miR-183 was predicted by bioinformatics combined with three databases of TargetScans,miRanda,PicTar, and the target gene EGR1 was selected for preliminary verification. The expression of miR-183 target gene EGR1 was detected by Real time PCR method in two groups of samples. Results: the results of 1TUNEL staining showed that the AI of ectopic focus tissue cells in EMT group was lower than that in eutopic endometrium and control group (p0.05). There was no significant difference in AI between EMT group and control group (p0.05). 2 the results of reactive oxygen species in mitochondria: the fluorescence intensity of mitochondria in the ectopic lesion of EMT was lower than that in the eutopic endometrium of EMT and that in the control group (p0.05). The expression of 3miR-183 in ectopic lesions in EMT group was significantly lower than that in eutopic endometrium and control group (p0. 05). There was no significant difference in the expression of miR-183 between the eutopic endometrium of EMT patients and the control group (p0.05). 4the expression of target gene EGR1 in ectopic focus of EMT group was higher than that in eutopic endometrium of EMT group and control group (p0.05). There was no significant difference in the expression of target gene EGR1 between the eutopic endometrium of EMT group and the control group (p0.05). Conclusion: the expression of miR-183 in ectopic tissue cells of EMT patients was significantly down-regulated, while the expression of miR-183 in eutopic endometrial tissues was not significantly changed, and the expression of target gene EGR1 was significantly up-regulated in ectopic lesion tissue cells. These results suggest that the negative regulation of target gene EGR1 is weakened by the loss of nesting tissue cells, which leads to the up-regulation of EGR1 expression in EMT ectopic tissue cells, which in turn induces the ability of endometrial cells losing their nests to resist apoptosis. The endometrial cells were implanted in the pelvis and the corresponding lesions were formed, causing a series of clinical symptoms.
【学位授予单位】:广州医科大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:R711.71
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