世界最新医学信息文摘(电子版)
世界最新醫學信息文摘(電子版)
세계최신의학신식문적(전자판)
World Latest Medicine Information
2014年
12期
125-128
,共4页
氧化应激%mtorc1信号通路%P70s6K%出生体重
氧化應激%mtorc1信號通路%P70s6K%齣生體重
양화응격%mtorc1신호통로%P70s6K%출생체중
oxidative stress%mtorc1 pathway%P70s6K%birth weight
目的:研究哺乳动物雷帕霉素靶蛋白( mammalian target of rapamycin,mtor)信号传导通路对出生体重的影响及其可能作用机制。方法按胎儿出生体重分三组,组1(出生体重<3000g),组2(3000g<出生体重<4000g),组3(出生体重>4000g),每组20例,各取胎盘组织,探讨tnf-α及H2o2与不同胎儿出生体重的相关性,再提取新鲜足月胎盘组织,分离提纯胎盘细胞,分为tnf-α处理组,H2o2处理组,雷帕霉素组,对照组,探讨tnf-α和H2o2与mtorc1信号转导通路的相关性。结果(1)与组2比,组3中tnf-α和H2o2表达量显著升高(P<0.05),而组1中两者下降明显(P<0.05);(2)在足月胎盘组织细胞中,与对照组相比,tnf-α和H2o2处理组中mtorc1蛋白的表达量明显升高(P<0.05),P70s6K的活性明显增强(P<0.05),且两者没有明显区别,而雷帕霉素能明显降低mtorc1蛋白的表达(P<0.05),抑制P70s6K的活性(P<0.05)。结论氧化应激可能通过胎盘活化mtorc1通路,激活P70s6K,进而参与胎儿出生体重的调节。
目的:研究哺乳動物雷帕黴素靶蛋白( mammalian target of rapamycin,mtor)信號傳導通路對齣生體重的影響及其可能作用機製。方法按胎兒齣生體重分三組,組1(齣生體重<3000g),組2(3000g<齣生體重<4000g),組3(齣生體重>4000g),每組20例,各取胎盤組織,探討tnf-α及H2o2與不同胎兒齣生體重的相關性,再提取新鮮足月胎盤組織,分離提純胎盤細胞,分為tnf-α處理組,H2o2處理組,雷帕黴素組,對照組,探討tnf-α和H2o2與mtorc1信號轉導通路的相關性。結果(1)與組2比,組3中tnf-α和H2o2錶達量顯著升高(P<0.05),而組1中兩者下降明顯(P<0.05);(2)在足月胎盤組織細胞中,與對照組相比,tnf-α和H2o2處理組中mtorc1蛋白的錶達量明顯升高(P<0.05),P70s6K的活性明顯增彊(P<0.05),且兩者沒有明顯區彆,而雷帕黴素能明顯降低mtorc1蛋白的錶達(P<0.05),抑製P70s6K的活性(P<0.05)。結論氧化應激可能通過胎盤活化mtorc1通路,激活P70s6K,進而參與胎兒齣生體重的調節。
목적:연구포유동물뢰파매소파단백( mammalian target of rapamycin,mtor)신호전도통로대출생체중적영향급기가능작용궤제。방법안태인출생체중분삼조,조1(출생체중<3000g),조2(3000g<출생체중<4000g),조3(출생체중>4000g),매조20례,각취태반조직,탐토tnf-α급H2o2여불동태인출생체중적상관성,재제취신선족월태반조직,분리제순태반세포,분위tnf-α처리조,H2o2처리조,뢰파매소조,대조조,탐토tnf-α화H2o2여mtorc1신호전도통로적상관성。결과(1)여조2비,조3중tnf-α화H2o2표체량현저승고(P<0.05),이조1중량자하강명현(P<0.05);(2)재족월태반조직세포중,여대조조상비,tnf-α화H2o2처리조중mtorc1단백적표체량명현승고(P<0.05),P70s6K적활성명현증강(P<0.05),차량자몰유명현구별,이뢰파매소능명현강저mtorc1단백적표체(P<0.05),억제P70s6K적활성(P<0.05)。결론양화응격가능통과태반활화mtorc1통로,격활P70s6K,진이삼여태인출생체중적조절。
To study the mammalian target of rapamycin (mammalian target of rapamycin, mTOR) pathway inlfuence on birth weight and its possible mechanism. Methods 60 patients were randomly divided into Group1(birth weight<3000g), group2(3000g<birth weight<4000g), group3(birth weight>4000g) according to the fetal birth weight, depicted the placental tissue to explore the relationship between TNF-αand H2o2 and birth weight, and then extracted from fresh term placental tissue , placental separation and purification of cells into TNF-α treated group, H2o2 treated group , rapamycin group, the control group to explore the relativity between TNF-αand H2o2 and mtorc1 pathway. Results (1)compared with group 2 , and H2o2 in TNF-αexpression of group3 were signiifcantly higher( P<0.05), but decreased signiifcantly in both group1( P<0.05);(2) In the term placental tissue cells , compared with the control group , mTORC1 protein expression levels were signiifcantly increased(P<0.05) in TNF-αand H2o2 treated group, the P70S6K activity signiifcantly increased(P<0.05), and no signiifcant difference between the two, rapamycin significantly reduced mtorc1 protein expression(P<0.05), and inhibit the activity of P70s6K(P<0.05). Conclusion oxidative stress may sensitize the placenta mtorc1 pathway, activate P70s6K, and thus participate in the regulation of birth weight.