目的观察ROCK抑制剂Y-27632对体外缺血清培养的小鼠骨髓间充质干细胞凋亡的影响。方法原代分离培养小鼠骨髓单个核细胞,应用流式细胞术对细胞CD29、CD44、CD90、CD34表面标志进行检测。成骨、成脂肪、成软骨分化后分别进行茜素红、油红...目的观察ROCK抑制剂Y-27632对体外缺血清培养的小鼠骨髓间充质干细胞凋亡的影响。方法原代分离培养小鼠骨髓单个核细胞,应用流式细胞术对细胞CD29、CD44、CD90、CD34表面标志进行检测。成骨、成脂肪、成软骨分化后分别进行茜素红、油红O及甲苯胺蓝染色。将第3代细胞随机分为3组:对照组、模型组(无血清)、Y-27632组(无血清+10μmol/L Y-27632),分别于培养后24、48、72 h收集细胞进行流式细胞仪TUNEL法观察各组细胞凋亡率,培养后24 h Western blot法检测ROCK1及cleaved caspase 3表达。结果分离的骨髓单个核细胞CD29(+)、CD44(+)、CD90(+)、CD34(-),三系分化后茜素红染色(+),油红O染色(+),甲苯胺蓝染色(+)。Y-27632能明显降低由于缺血清培养导致的BMSCs的凋亡率(P<0.01),Y-27632能够明显降低ROCK及cleaved-caspase 3表达(P<0.01)。结论分离的骨髓单个核细胞就是骨髓间充质干细胞。Y-27632能够抑制由于缺血清培养导致的小鼠骨髓间充质干细胞的凋亡。展开更多
目的探讨Rho激酶抑制剂Y-27623对心肌缺血再灌注损伤(MIRI)中细胞凋亡的影响,以及对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)和凋亡相关蛋白表达水平的变化和意义.方法成年雄性SD大鼠60只,应用随机数字表法分为4组,...目的探讨Rho激酶抑制剂Y-27623对心肌缺血再灌注损伤(MIRI)中细胞凋亡的影响,以及对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)和凋亡相关蛋白表达水平的变化和意义.方法成年雄性SD大鼠60只,应用随机数字表法分为4组,每组15只:正常对照组(Sham组)、缺血再灌注组(ischemia-reperfusion,I/R组)、Dil组(Diltiazem,地尔硫卓组)和Y-27632组.Dil组每日给予地尔硫卓(10 mg/kg)灌胃,Y-27632组每日给予Y-27632(5 mg/kg),其余两组给予等体积清水.给药5天后Sham组只穿线,不结扎冠状动脉左前降支,I/R组、Dil组和Y-27632组均建立MIRI模型.TUNEL法检测各组心肌凋亡,计算心肌细胞凋亡指数(AI),western blotting法检测心肌组织中MAPK信号传导途径相关蛋白(p-JNK/ERK/P38)和凋亡相关蛋白(Bcl-2、Bax、Caspase-3和Caspase-9)的表达.结果相对于Sham组,I/R组AI明显增加(35.15±3.12比1.15±0.12,P<0.01),MAPK信号传导途径(p-JNK:0.792±0.071比0.344±0.055;p-ERK:0.809±0.087比0.273±0.055;p-P38:0.781±0.049比0.158±0.071)和心肌促凋亡相关蛋白(Bax:1.127±0.060比0.47±0.054;Caspase-3:0.843±0.092比0.289±0.068;Caspase-9:0.831±0.068比0.273±0.048)表达显著增加(P均<0.05),心肌抗凋亡蛋白Bcl-2表达显著减少(0.255±0.060比0.809±0.056,P<0.05);相对于I/R组,Y-27632治疗组AI明显下降(20.05±1.75比35.15±3.12,P<0.01),与Dil治疗组差异无统计学意义(20.05±1.75比22.12±2.01,P>0.05),Y-27632治疗组MAPK信号传导途径相关蛋白(p-JNK:0.443±0.027比0.792±0.344;p-ERK:0.284±0.038比0.809±0.087;p-P38:0.301±0.049比0.781±0.049)和Bax(0.807±0.072比1.127±0.060)、Caspase-3(0.329±0.040比0.843±0.092)和Caspase-9(0.454±0.048比0.831±0.068)表达均显著降低(P<0.05),Bcl-2表达显著增加(0.582±0.048比0.255±0.060,P<0.05),与Dil治疗组差异无统计学意义(p-JNK:0.443±0.027比0.552±0.044;p-ERK:0.284±0.038比0.273±0.049;p-P38:0.301±0.049比0.339±0.038;Bax:0.807±0.072比0.645±0.108;Caspase-3:0.329±0.040比0.378±0.096;Caspase-9:0.454±0.048比0.434±0.032;Bcl-2:0.582±0.048比0.614±0.06,P均>0.05).结论Y-27632通过抑制JNK/ERK/P38的磷酸化,抑制Bax、Caspase-3和Caspase-9的表达,加强Bcl-2的表达,减少心肌细胞的凋亡,从而减轻心肌缺血再灌注损伤.展开更多
Y-27632为嘧啶衍生物,是一种近年来合成的特异性Rho相关螺旋卷曲蛋白激酶(Rho associated coiled-coil forming protein kinase,R O C K)抑制剂,能通过调控R O C K介导的多种生物效应从而抑制肝纤维化的形成.研究发现,转化生长因子β1(t...Y-27632为嘧啶衍生物,是一种近年来合成的特异性Rho相关螺旋卷曲蛋白激酶(Rho associated coiled-coil forming protein kinase,R O C K)抑制剂,能通过调控R O C K介导的多种生物效应从而抑制肝纤维化的形成.研究发现,转化生长因子β1(transforming growth factorβ1,TGF-β1)/结缔组织生长因子(connective tissue growth factor,CTGF)通路参与肝纤维化的形成,TGF-β1诱导其下游效应分子CTGF表达,促使细胞外基质生成增多,导致肝纤维化.Y-27632具有抑制TGF-β1和CTGF表达的作用,本文从ROCK抑制剂Y-27632对TGF-β1/CTGF通路的影响来阐述Y-27632的抗纤维化作用,借此更深入的了解Y-27632的作用靶点,为肝纤维化的靶向治疗提供理论依据.展开更多
AIM: To investigate the interfering effect of Y-27632, a ROCK-I selective inhibitor, on the signal transduction pathway of transforming growth factor-β1 (TGF-β1) in ocular Tenon capsule fibroblasts (OTFS) in vitro ....AIM: To investigate the interfering effect of Y-27632, a ROCK-I selective inhibitor, on the signal transduction pathway of transforming growth factor-β1 (TGF-β1) in ocular Tenon capsule fibroblasts (OTFS) in vitro . METHODS: After OTFS from passages 4 to 6 in vitro were induced by TGF-β1 and then treated by Y-27632, the changes of the OTFS cell cycles were analyzed via flow cytometry, and the proteins expression of the α-smooth muscular actin (α-SMA), connective tissue growth factor (CTGF), collagen I were calculated by Western blot. After OTFS treated by the different concentrations of Y-27632, the expression levels of the α-SMA, CTGF and collagen I mRNA were assayed by RT-PCR.RESULTS: Y-27632 had no markedly effect on the OTFS cell cycles. After treated by TGF-β1, OTFS in G1 period significantly increased. The cell cycles distribution by both TGF-β1 and Y-27632 had no remarkable difference from that in control group. Y-27632 significantly inhibited the proteins expressions of both α-SMA and CTGF, while to some extent inhibited that of collagen I. TGF-β1 significantly promoted the proteins expressions of α-SMA, CTGF and collagen I. After OTFS treated by both TGF-β1 and Y-27632, of α-SMA, the protein expression was similar with that in control group (P=0.066>0.05), but the protein expression of CTGF or collagen I, respectively, was significantly different from that in control group (P=0.000<0.01). The differences of expressions of the α-SMA, CTGF and collagen I mRNA in 30, 150, 750μmol/L Y-27632 group were statistically significant, compared with those in control group, respectively (α-SMA, P=0.002, 0.000, 0.000; CTGF, P=0.014, 0.002, 0.001; collagen I, P=0.003, 0.002, 0.000).CONCLUSION: Blocking the Rho/ROCK signaling pathway by using of Y-27632 could inhibit the cellular proliferation and the expression of both CTGF and α-SMA whatever OTFS induced by TGF-β1 or not. Y-27632 suppressed the expression of collagen I mRNA without induction.展开更多
文摘目的观察ROCK抑制剂Y-27632对体外缺血清培养的小鼠骨髓间充质干细胞凋亡的影响。方法原代分离培养小鼠骨髓单个核细胞,应用流式细胞术对细胞CD29、CD44、CD90、CD34表面标志进行检测。成骨、成脂肪、成软骨分化后分别进行茜素红、油红O及甲苯胺蓝染色。将第3代细胞随机分为3组:对照组、模型组(无血清)、Y-27632组(无血清+10μmol/L Y-27632),分别于培养后24、48、72 h收集细胞进行流式细胞仪TUNEL法观察各组细胞凋亡率,培养后24 h Western blot法检测ROCK1及cleaved caspase 3表达。结果分离的骨髓单个核细胞CD29(+)、CD44(+)、CD90(+)、CD34(-),三系分化后茜素红染色(+),油红O染色(+),甲苯胺蓝染色(+)。Y-27632能明显降低由于缺血清培养导致的BMSCs的凋亡率(P<0.01),Y-27632能够明显降低ROCK及cleaved-caspase 3表达(P<0.01)。结论分离的骨髓单个核细胞就是骨髓间充质干细胞。Y-27632能够抑制由于缺血清培养导致的小鼠骨髓间充质干细胞的凋亡。
文摘Y-27632为嘧啶衍生物,是一种近年来合成的特异性Rho相关螺旋卷曲蛋白激酶(Rho associated coiled-coil forming protein kinase,R O C K)抑制剂,能通过调控R O C K介导的多种生物效应从而抑制肝纤维化的形成.研究发现,转化生长因子β1(transforming growth factorβ1,TGF-β1)/结缔组织生长因子(connective tissue growth factor,CTGF)通路参与肝纤维化的形成,TGF-β1诱导其下游效应分子CTGF表达,促使细胞外基质生成增多,导致肝纤维化.Y-27632具有抑制TGF-β1和CTGF表达的作用,本文从ROCK抑制剂Y-27632对TGF-β1/CTGF通路的影响来阐述Y-27632的抗纤维化作用,借此更深入的了解Y-27632的作用靶点,为肝纤维化的靶向治疗提供理论依据.
基金Shaanxi Province Science and Technology Gongguan Program, China (No.2011-K14-02-03)
文摘AIM: To investigate the interfering effect of Y-27632, a ROCK-I selective inhibitor, on the signal transduction pathway of transforming growth factor-β1 (TGF-β1) in ocular Tenon capsule fibroblasts (OTFS) in vitro . METHODS: After OTFS from passages 4 to 6 in vitro were induced by TGF-β1 and then treated by Y-27632, the changes of the OTFS cell cycles were analyzed via flow cytometry, and the proteins expression of the α-smooth muscular actin (α-SMA), connective tissue growth factor (CTGF), collagen I were calculated by Western blot. After OTFS treated by the different concentrations of Y-27632, the expression levels of the α-SMA, CTGF and collagen I mRNA were assayed by RT-PCR.RESULTS: Y-27632 had no markedly effect on the OTFS cell cycles. After treated by TGF-β1, OTFS in G1 period significantly increased. The cell cycles distribution by both TGF-β1 and Y-27632 had no remarkable difference from that in control group. Y-27632 significantly inhibited the proteins expressions of both α-SMA and CTGF, while to some extent inhibited that of collagen I. TGF-β1 significantly promoted the proteins expressions of α-SMA, CTGF and collagen I. After OTFS treated by both TGF-β1 and Y-27632, of α-SMA, the protein expression was similar with that in control group (P=0.066>0.05), but the protein expression of CTGF or collagen I, respectively, was significantly different from that in control group (P=0.000<0.01). The differences of expressions of the α-SMA, CTGF and collagen I mRNA in 30, 150, 750μmol/L Y-27632 group were statistically significant, compared with those in control group, respectively (α-SMA, P=0.002, 0.000, 0.000; CTGF, P=0.014, 0.002, 0.001; collagen I, P=0.003, 0.002, 0.000).CONCLUSION: Blocking the Rho/ROCK signaling pathway by using of Y-27632 could inhibit the cellular proliferation and the expression of both CTGF and α-SMA whatever OTFS induced by TGF-β1 or not. Y-27632 suppressed the expression of collagen I mRNA without induction.
