Objective:To study the effect of estrogen on anovulatory dysfunctional uterine bleeding(ADUB).Methods:Primary endometrial epithelial cells of Hainan Lizu female was cultured and hydrolylic activity of gelalinase was d...Objective:To study the effect of estrogen on anovulatory dysfunctional uterine bleeding(ADUB).Methods:Primary endometrial epithelial cells of Hainan Lizu female was cultured and hydrolylic activity of gelalinase was determined by gelatin zymography analysis.Cellular mRNA and protein synthesis was blocked respectively to determine whether the increased expression of MMP-2/9 was induced by estrogen.The expression of VEGF was blocked by siRNA.After treatment with various factors.MMP-9,VEGF,total Erk and phosphorylated Erk expression in primary uterine epithelial cells was detected by Western blotting analysis.Cell MMP-2/9mRNA levels was measured by real-time RT-PCR.Results:The activity and expression of MMP2/9 was inereased in the endometrium of patients with ADUB.Estrogen could up-regulate the expression of VEGF and activate Erk 1/2-Elk1 signal path.After interference by siRNA,ERK1/2 pathway was blocked in cells,and the expression of MMP-2/9 was down-regulated.ERK1/2 specific blocker U0126 blocked ERK phosphorylation,and it could down-regulate the expression of MMP-2/9.Conclusions:The results showed that the estrogen can increase the expression of VEGF,and thus activate ERK1/2 pathway to induce MMP-2/9 expression.展开更多
Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammat...Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammation attributed primarily to infection by oral anaerobe, P. gingivalis. In this study, we explored the role of Rac1 and mitogen-activated protein kinases (MAPKs) in the processes of MMP-9 release in sublingual salivary gland cells exposed to P. gingivalis key endotoxin, cell wall lipopolysaccharide (LPS). We demonstrate that the LPS-elicited induction in the acinar cell MMP-9 release is associated with MAPK, ERK and p38 activation, and occurs with the involvement of Rac1 and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>). Further, we reveal that the LPS-induced MMP-9 release involves ERK-mediated phosphorylation of cPLA<sub>2</sub> on Ser<sup>505</sup> that is essential for its membrane translocation with Rac1, and that this process requires p38 activation. Moreover, we show that phosphorylation and membrane localization of p38 with Rac1-GTP play a pivotal role in cPLA<sub>2</sub>-dependent induction in MMP-9 release. Thus collectively, our findings infer that P. gingivalis LPS-induced up-regulation in the acinar cell MMP-9 release requires ERK-dependent recruitment of cPLA<sub>2</sub> to the membrane localized Rac1/p38 complex.展开更多
目的:探究六味地黄苷糖(LW-AFC)通过调控ERK/MMP-9信号通路对高糖诱导的胎盘滋养层细胞增殖侵袭作用机制研究。方法:将在ATCC细胞库购买胎盘滋养层细胞分为空白对照组(空白组):胎盘滋养层细胞正常培养,不做任何处理;高糖诱导组(诱导组)...目的:探究六味地黄苷糖(LW-AFC)通过调控ERK/MMP-9信号通路对高糖诱导的胎盘滋养层细胞增殖侵袭作用机制研究。方法:将在ATCC细胞库购买胎盘滋养层细胞分为空白对照组(空白组):胎盘滋养层细胞正常培养,不做任何处理;高糖诱导组(诱导组):采用高糖诱导的方式制作高糖胎盘滋养层细胞模型;六味地黄苷糖组(苷糖组):在高糖诱导胎盘滋养层细胞模型完成后给予LW-AFC培养。通过MTT法检测胎盘滋养层细胞增殖率,Western blot法检测胎盘滋养层细胞中ERK/MMP-9的蛋白含量,Transwell小室实验检测胎盘滋养层细胞侵袭情况,qRT-PCR法检测胎盘滋养层细胞中ERK/MMP-9mRNA的表达含量,克隆法检测胎盘滋养层细胞迁移情况的差异性,探究LW-AFC对高糖诱导的胎盘滋养层细胞增殖侵袭及ERK/MMP-9通路表达的影响。结果:随着时间的推移,诱导组胎盘滋养层细胞的增殖率降低,与诱导组比较,苷糖组细胞增殖率显著升高(P<0.05)。苷糖组与诱导组比较,苷糖组滋养层细胞侵袭能力显著高于诱导组细胞(P<0.05)。诱导组、苷糖组与空白组比较,空白组细胞克隆数量显著较多(P<0.05);苷糖组与诱导组比较,诱导组胎盘滋养层细胞克隆数量显著低于苷糖组(P<0.05)。诱导组胎盘滋养层细胞中ERK/MMP-9蛋白表达、ERK/MMP-9 mRNA表达量最高,空白组胎盘滋养层细胞蛋白表达、mRNA表达量低于苷糖组、诱导组(P<0.05),苷糖组与诱导组比较,苷糖组胎盘滋养层细胞ERK/MMP-9蛋白表达、ERK/MMP-9 m RNA表达量显著低于诱导组(P<0.05)。结论:LW-AFC能够提升高糖诱导的胎盘滋养层细胞的增殖速率,增加细胞迁移、侵袭的数量,LW-AFC的作用机制可能与下调ERK/MMP-9通路表达含量有关,这一试验结果可逐步应用于临床妊娠糖尿病患者的治疗中。展开更多
基金supported by Natural Science Foundation of Hainan Province(No.812148)
文摘Objective:To study the effect of estrogen on anovulatory dysfunctional uterine bleeding(ADUB).Methods:Primary endometrial epithelial cells of Hainan Lizu female was cultured and hydrolylic activity of gelalinase was determined by gelatin zymography analysis.Cellular mRNA and protein synthesis was blocked respectively to determine whether the increased expression of MMP-2/9 was induced by estrogen.The expression of VEGF was blocked by siRNA.After treatment with various factors.MMP-9,VEGF,total Erk and phosphorylated Erk expression in primary uterine epithelial cells was detected by Western blotting analysis.Cell MMP-2/9mRNA levels was measured by real-time RT-PCR.Results:The activity and expression of MMP2/9 was inereased in the endometrium of patients with ADUB.Estrogen could up-regulate the expression of VEGF and activate Erk 1/2-Elk1 signal path.After interference by siRNA,ERK1/2 pathway was blocked in cells,and the expression of MMP-2/9 was down-regulated.ERK1/2 specific blocker U0126 blocked ERK phosphorylation,and it could down-regulate the expression of MMP-2/9.Conclusions:The results showed that the estrogen can increase the expression of VEGF,and thus activate ERK1/2 pathway to induce MMP-2/9 expression.
文摘Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammation attributed primarily to infection by oral anaerobe, P. gingivalis. In this study, we explored the role of Rac1 and mitogen-activated protein kinases (MAPKs) in the processes of MMP-9 release in sublingual salivary gland cells exposed to P. gingivalis key endotoxin, cell wall lipopolysaccharide (LPS). We demonstrate that the LPS-elicited induction in the acinar cell MMP-9 release is associated with MAPK, ERK and p38 activation, and occurs with the involvement of Rac1 and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>). Further, we reveal that the LPS-induced MMP-9 release involves ERK-mediated phosphorylation of cPLA<sub>2</sub> on Ser<sup>505</sup> that is essential for its membrane translocation with Rac1, and that this process requires p38 activation. Moreover, we show that phosphorylation and membrane localization of p38 with Rac1-GTP play a pivotal role in cPLA<sub>2</sub>-dependent induction in MMP-9 release. Thus collectively, our findings infer that P. gingivalis LPS-induced up-regulation in the acinar cell MMP-9 release requires ERK-dependent recruitment of cPLA<sub>2</sub> to the membrane localized Rac1/p38 complex.
文摘目的:探究六味地黄苷糖(LW-AFC)通过调控ERK/MMP-9信号通路对高糖诱导的胎盘滋养层细胞增殖侵袭作用机制研究。方法:将在ATCC细胞库购买胎盘滋养层细胞分为空白对照组(空白组):胎盘滋养层细胞正常培养,不做任何处理;高糖诱导组(诱导组):采用高糖诱导的方式制作高糖胎盘滋养层细胞模型;六味地黄苷糖组(苷糖组):在高糖诱导胎盘滋养层细胞模型完成后给予LW-AFC培养。通过MTT法检测胎盘滋养层细胞增殖率,Western blot法检测胎盘滋养层细胞中ERK/MMP-9的蛋白含量,Transwell小室实验检测胎盘滋养层细胞侵袭情况,qRT-PCR法检测胎盘滋养层细胞中ERK/MMP-9mRNA的表达含量,克隆法检测胎盘滋养层细胞迁移情况的差异性,探究LW-AFC对高糖诱导的胎盘滋养层细胞增殖侵袭及ERK/MMP-9通路表达的影响。结果:随着时间的推移,诱导组胎盘滋养层细胞的增殖率降低,与诱导组比较,苷糖组细胞增殖率显著升高(P<0.05)。苷糖组与诱导组比较,苷糖组滋养层细胞侵袭能力显著高于诱导组细胞(P<0.05)。诱导组、苷糖组与空白组比较,空白组细胞克隆数量显著较多(P<0.05);苷糖组与诱导组比较,诱导组胎盘滋养层细胞克隆数量显著低于苷糖组(P<0.05)。诱导组胎盘滋养层细胞中ERK/MMP-9蛋白表达、ERK/MMP-9 mRNA表达量最高,空白组胎盘滋养层细胞蛋白表达、mRNA表达量低于苷糖组、诱导组(P<0.05),苷糖组与诱导组比较,苷糖组胎盘滋养层细胞ERK/MMP-9蛋白表达、ERK/MMP-9 m RNA表达量显著低于诱导组(P<0.05)。结论:LW-AFC能够提升高糖诱导的胎盘滋养层细胞的增殖速率,增加细胞迁移、侵袭的数量,LW-AFC的作用机制可能与下调ERK/MMP-9通路表达含量有关,这一试验结果可逐步应用于临床妊娠糖尿病患者的治疗中。
