天津医药
天津醫藥
천진의약
TIANJIN MEDICAL JOURNAL
2015年
1期
25-29
,共5页
陈艳霞%吴险峰%房向东%秦晓华%黄翀%涂卫平
陳豔霞%吳險峰%房嚮東%秦曉華%黃翀%塗衛平
진염하%오험봉%방향동%진효화%황충%도위평
红细胞生成素,重组%细胞增殖%细胞凋亡%rho相关激酶类%HK-2细胞%高糖%RhoA/ROCK信号通路
紅細胞生成素,重組%細胞增殖%細胞凋亡%rho相關激酶類%HK-2細胞%高糖%RhoA/ROCK信號通路
홍세포생성소,중조%세포증식%세포조망%rho상관격매류%HK-2세포%고당%RhoA/ROCK신호통로
erythropoietin,recombinant%cell proliferation%apoptosis%rho-associated kinases%HK-2 cells%high glu-cose%RhoA/ROCK signaling pathway
目的:探讨重组人红细胞生成素(rhEPO)对高糖诱导的正常人肾小管上皮(HK-2)细胞增殖及凋亡的影响及其可能机制。方法将体外培养的HK-2细胞按随机数字表法分为空白对照组、高糖诱导组(高糖终浓度为30 mmol/L)、甘露醇对照组(甘露醇浓度为24.5 mmol/L)、rhEPO对照组(rhEPO终浓度为20 U/mL)、不同浓度rhEPO干预组(高糖终浓度为30 mmol/L+rhEPO终浓度分别为5、10、20 U/mL)及Rho激酶抑制剂(Y27632)组(Y27632终浓度为30μmol/L+高糖终浓度为30 mmol/L),各组均刺激24 h。应用 RT-PCR 法检测各组 HK-2细胞 RhoA、ROCK1 mRNA的表达;MTT法测定细胞增殖,流式细胞技术分析细胞凋亡。结果高糖诱导组RhoA及ROCK1 mRNA表达较空白对照组显著升高(P<0.05),不同浓度rhEPO干预组RhoA mRNA及ROCK1 mRNA的表达较高糖诱导组显著减少(P<0.05),高糖诱导组及不同浓度rhEPO干预组RhoA mRNA与ROCK1 mRNA表达呈正相关。rhEPO可明显促进HK-2细胞增殖(P<0.05),而高糖可诱导正常人肾小管上皮细胞凋亡,加入不同浓度rhEPO或Y27632干预后,其凋亡明显受抑制(P<0.05),且在实验rhEPO浓度范围内,rhEPO促进增殖及抑制凋亡的作用呈现浓度依赖性。结论 rhEPO可促进高糖诱导的HK-2细胞增殖,抑制高糖诱导的HK-2细胞凋亡,其机制可能与阻断RhoA/ROCK信号通路有关。
目的:探討重組人紅細胞生成素(rhEPO)對高糖誘導的正常人腎小管上皮(HK-2)細胞增殖及凋亡的影響及其可能機製。方法將體外培養的HK-2細胞按隨機數字錶法分為空白對照組、高糖誘導組(高糖終濃度為30 mmol/L)、甘露醇對照組(甘露醇濃度為24.5 mmol/L)、rhEPO對照組(rhEPO終濃度為20 U/mL)、不同濃度rhEPO榦預組(高糖終濃度為30 mmol/L+rhEPO終濃度分彆為5、10、20 U/mL)及Rho激酶抑製劑(Y27632)組(Y27632終濃度為30μmol/L+高糖終濃度為30 mmol/L),各組均刺激24 h。應用 RT-PCR 法檢測各組 HK-2細胞 RhoA、ROCK1 mRNA的錶達;MTT法測定細胞增殖,流式細胞技術分析細胞凋亡。結果高糖誘導組RhoA及ROCK1 mRNA錶達較空白對照組顯著升高(P<0.05),不同濃度rhEPO榦預組RhoA mRNA及ROCK1 mRNA的錶達較高糖誘導組顯著減少(P<0.05),高糖誘導組及不同濃度rhEPO榦預組RhoA mRNA與ROCK1 mRNA錶達呈正相關。rhEPO可明顯促進HK-2細胞增殖(P<0.05),而高糖可誘導正常人腎小管上皮細胞凋亡,加入不同濃度rhEPO或Y27632榦預後,其凋亡明顯受抑製(P<0.05),且在實驗rhEPO濃度範圍內,rhEPO促進增殖及抑製凋亡的作用呈現濃度依賴性。結論 rhEPO可促進高糖誘導的HK-2細胞增殖,抑製高糖誘導的HK-2細胞凋亡,其機製可能與阻斷RhoA/ROCK信號通路有關。
목적:탐토중조인홍세포생성소(rhEPO)대고당유도적정상인신소관상피(HK-2)세포증식급조망적영향급기가능궤제。방법장체외배양적HK-2세포안수궤수자표법분위공백대조조、고당유도조(고당종농도위30 mmol/L)、감로순대조조(감로순농도위24.5 mmol/L)、rhEPO대조조(rhEPO종농도위20 U/mL)、불동농도rhEPO간예조(고당종농도위30 mmol/L+rhEPO종농도분별위5、10、20 U/mL)급Rho격매억제제(Y27632)조(Y27632종농도위30μmol/L+고당종농도위30 mmol/L),각조균자격24 h。응용 RT-PCR 법검측각조 HK-2세포 RhoA、ROCK1 mRNA적표체;MTT법측정세포증식,류식세포기술분석세포조망。결과고당유도조RhoA급ROCK1 mRNA표체교공백대조조현저승고(P<0.05),불동농도rhEPO간예조RhoA mRNA급ROCK1 mRNA적표체교고당유도조현저감소(P<0.05),고당유도조급불동농도rhEPO간예조RhoA mRNA여ROCK1 mRNA표체정정상관。rhEPO가명현촉진HK-2세포증식(P<0.05),이고당가유도정상인신소관상피세포조망,가입불동농도rhEPO혹Y27632간예후,기조망명현수억제(P<0.05),차재실험rhEPO농도범위내,rhEPO촉진증식급억제조망적작용정현농도의뢰성。결론 rhEPO가촉진고당유도적HK-2세포증식,억제고당유도적HK-2세포조망,기궤제가능여조단RhoA/ROCK신호통로유관。
Objective To study the effects of erythropoietin (rhEPO) in high glucose induced proliferation and apopto?sis of human kidney proximal tubular epithelial (HK-2) cells, and the possible mechanism thereof. Methods HK-2 cells cultured in vitro were divided into several groups randomly:blank control group, high glucose group, mannitol group, rhEPO control group, different concentrations of rhEPO treatment groups (5, 10, 20 U/mL) and Rho kinase group. The reverse tran?scription polymerase chain reaction (RT-PCR) was used to evaluate the mRNA levels of RhoA and ROCK after 24 hours. Tetrazolium salt method (MTT) was used to determine the cell proliferation. Cell apoptosis was detected by flow cytometry. Results Compared with blank control group the expression levels of RhoA and ROCK1 mRNA were significantly in?creased in high glucose group (P < 0.05). RhoA, ROCK1 mRNA expressions significantly decreased in rhEPO group than those of high glucose group (P<0.05). There was a positive correlation between the expression levels of RhoA mRNA and ROCK1 mRNA in high glucose group and rhEPO group. MTT method showed that rhEPO significantly promoted the prolifer?ation of HK-2 cells (P<0.05). Flow cytometry analysis showed that high glucose induced apoptosis in HK-2 cells, which was significantly inhibited in rhEPO group and Rho kinase group as compared to that of high glucose group in a concentra?tion dependent manner (P<0.05). Conclusion rhEPO can promote HK-2 cell proliferation and inhibit apoptosis, which may be related to RhoA/ROCK signaling pathway.