钙调磷酸酶-活化T细胞核因子(nuclear factor of activated T cells,NFAT)信号途径作为肌肉细胞内重要的生物信号转导途径,在肌肉细胞中起到调节枢纽的作用,与肌肉生长及肌纤维的类型有密切关系。而肌肉组织降解在动物肌肉嫩化过程中具...钙调磷酸酶-活化T细胞核因子(nuclear factor of activated T cells,NFAT)信号途径作为肌肉细胞内重要的生物信号转导途径,在肌肉细胞中起到调节枢纽的作用,与肌肉生长及肌纤维的类型有密切关系。而肌肉组织降解在动物肌肉嫩化过程中具有重要的意义。因此,钙调磷酸酶-NFAT信号途径可能与肌肉嫩化有密切关系,深入研究其调控肌肉组织降解的分子机制将有助于揭示肌肉嫩化的深刻机理。展开更多
p38丝裂原活化蛋白激酶(MAPK)信号途径是成肌细胞分化过程中重要的调节途径。p38 M APK蛋白在成肌细胞分化过程中受上游丝裂原活化蛋白激酶激酶3(M KK3)、丝裂原活化蛋白激酶激酶6(MKK6)的激活而活化其下游成肌分化蛋白(MyoD)、肌生成素...p38丝裂原活化蛋白激酶(MAPK)信号途径是成肌细胞分化过程中重要的调节途径。p38 M APK蛋白在成肌细胞分化过程中受上游丝裂原活化蛋白激酶激酶3(M KK3)、丝裂原活化蛋白激酶激酶6(MKK6)的激活而活化其下游成肌分化蛋白(MyoD)、肌生成素5(Myf5)、肌形成蛋白(myogenin)、肌肉调节因子4(MRF4)等肌肉调节因子。p38 MAPK信号途径的活化可以进一步增加骨骼肌纤维细胞蛋白含量,增加肌纤维长度和横截面直径,使骨骼肌纤维在数量不变的前提下质量大幅度提高,本文就p38 MAPK信号途径调节骨骼肌生长发育的机理进行综述。展开更多
Background Myocardial infarction results in tissue necrosis, leading to cell loss and ultimately to cardiac failure. Implantation of skeletal muscle satellite cells into the scar area may compensate for the cell loss ...Background Myocardial infarction results in tissue necrosis, leading to cell loss and ultimately to cardiac failure. Implantation of skeletal muscle satellite cells into the scar area may compensate for the cell loss and provides a new strategy for infarct therapy. Vascular endothelial growth factor （VEGF） is a promising reagent for inducing myocardial angiogenesis. Skeletal myoblast transplantation has been shown to improve cardiac function in chronic heart failure models by regenerating muscle. We hypothesized that VEGF expression and vascular regeneration increased in infarcted myocardium by skeletal muscle satellite cells, which can promote vascular producing and improve survival environment in infarcted myocardium. Methods The skeletal muscle satellite cells were implanted into the infarcted myocardium in a model through ligated left anterior artery in Louis Inbrad Strain rat. Specimens were got for identifying the expression of VEGF and the density of vascular by immunochemical method at two weeks after implantation. Results The proliferation and differentiation of the skeletal muscle satellite cell was very well. The expression of VEGF was higher in the implanted group （146.83±2.49） than that in the control group （134.26±6.84） （P〈0.05）. The vascular density in the implanted group （13,00± 1.51） was also higher than that in the control （10.68 ± 1.79） （P〈0.05）. Conclusion The implanted satellite cell could excrete growth factor that would induce angiogenesis and improve cell survival environment in infarcted myocardium.展开更多
文摘钙调磷酸酶-活化T细胞核因子(nuclear factor of activated T cells,NFAT)信号途径作为肌肉细胞内重要的生物信号转导途径,在肌肉细胞中起到调节枢纽的作用,与肌肉生长及肌纤维的类型有密切关系。而肌肉组织降解在动物肌肉嫩化过程中具有重要的意义。因此,钙调磷酸酶-NFAT信号途径可能与肌肉嫩化有密切关系,深入研究其调控肌肉组织降解的分子机制将有助于揭示肌肉嫩化的深刻机理。
基金This study was supported by a grant from the Natural Science Foundation of Hubei Province (No. 2004AB135).
文摘Background Myocardial infarction results in tissue necrosis, leading to cell loss and ultimately to cardiac failure. Implantation of skeletal muscle satellite cells into the scar area may compensate for the cell loss and provides a new strategy for infarct therapy. Vascular endothelial growth factor （VEGF） is a promising reagent for inducing myocardial angiogenesis. Skeletal myoblast transplantation has been shown to improve cardiac function in chronic heart failure models by regenerating muscle. We hypothesized that VEGF expression and vascular regeneration increased in infarcted myocardium by skeletal muscle satellite cells, which can promote vascular producing and improve survival environment in infarcted myocardium. Methods The skeletal muscle satellite cells were implanted into the infarcted myocardium in a model through ligated left anterior artery in Louis Inbrad Strain rat. Specimens were got for identifying the expression of VEGF and the density of vascular by immunochemical method at two weeks after implantation. Results The proliferation and differentiation of the skeletal muscle satellite cell was very well. The expression of VEGF was higher in the implanted group （146.83±2.49） than that in the control group （134.26±6.84） （P〈0.05）. The vascular density in the implanted group （13,00± 1.51） was also higher than that in the control （10.68 ± 1.79） （P〈0.05）. Conclusion The implanted satellite cell could excrete growth factor that would induce angiogenesis and improve cell survival environment in infarcted myocardium.
