AIM: To explore different roles of TGF-β (transforming growth factor beta) and bone morphogenetic proteins (BMPs)in hepatic stellate cell proliferation and trans-differentiation.METHODS: Hepatic stellate cells were i...AIM: To explore different roles of TGF-β (transforming growth factor beta) and bone morphogenetic proteins (BMPs)in hepatic stellate cell proliferation and trans-differentiation.METHODS: Hepatic stellate cells were isolated from male Sprague-Dawley rats. Sub-cultured hepatic stellate cells were employed for cell proliferation assay with WST-1 reagent and Western blot analysis with antibody against smooth muscle alpha actin (SMA).RESULTS: The results indicated that TGF-β1 significantly inhibited cell proliferation at concentration as low as 0.1 ng/ml, but both BMP-2 and BMP-4 did not affect cell proliferation at concentration as high as 10 ng/ml. The effect on hepatic stellate cell trans-differentiation was similar between TGFβ1 and BMPs. However, BMPs was more potent at transdifferentiation of hepatic stellate cells than TGF-β1. In addition, we observed that TGF-β1 transient reduced the abundance of SMA in hepatic stellate cells.CONCLUSION: TGF-β may be more important in regulation of hepatic stellate cell proliferation while BMPs may be the major cytokines regulating hepatic stellate cell transdifferentiation.展开更多
Objective： To observe the effect of moxibustion on the expressions of transforming growth factor-β （TGF-β） protein, and Smad4 protein and mRNA in rats with intestinal fibrosis in Crohn disease （CD）, and to disc...Objective： To observe the effect of moxibustion on the expressions of transforming growth factor-β （TGF-β） protein, and Smad4 protein and mRNA in rats with intestinal fibrosis in Crohn disease （CD）, and to discuss the action mechanism of acupuncture-moxibustion in treating intestinal fibrosis in CD from the perspective of TGF-β/Smads signal pathway. Methods： A CD intestinal fibrosis model was developed by using male SD rats of clean grade. The rats were randomized into a normal group, a model group, a mild moxibustion group, an electroacupuncture （EA） group, and a herb-partitioned moxibustion group. The rats in the normal and the model groups did not receive any interventions. Tianshu （ST 25） and Qihai （CV 6） were selected for the rats in the mild moxibustion group, the EA group, and the herb-partitioned moxibustion group. Mild moxibustion, EA, and herb-partitioned moxibustion were given respectively. After treatment, the expressions of TGF-β and Smad4 proteins in rat’s colon were detected by using immunohistochemistry （IHC）; the expression of Smad4 mRNA was determined by using fluorescence quantitative polymerase chain reaction （FQ-PCR）. Results： Compared with the normal group, the expressions of TGF-β protein, Smad4 protein and Smad4 mRNA significantly increased in the model group （P0.01）. Compared with the model group, the expressions of TGF-β protein, Smad4 protein, and Smad4 mRNA dropped markedly （P0.01 or P0.05） after treatments of mild moxibustion, EA, and herb-partitioned moxibustion. Conclusion： The expressions of TGF-β protein, Smad4 protein and Smad4 mRNA significantly increase in CD rats withintestinal fibrosis; while mild moxibustion, EA and herb-partitioned moxibustion at Tianshu （ST 25） and Qihai （CV 6） all can down-regulate the abnormal expressions.展开更多
文摘AIM: To explore different roles of TGF-β (transforming growth factor beta) and bone morphogenetic proteins (BMPs)in hepatic stellate cell proliferation and trans-differentiation.METHODS: Hepatic stellate cells were isolated from male Sprague-Dawley rats. Sub-cultured hepatic stellate cells were employed for cell proliferation assay with WST-1 reagent and Western blot analysis with antibody against smooth muscle alpha actin (SMA).RESULTS: The results indicated that TGF-β1 significantly inhibited cell proliferation at concentration as low as 0.1 ng/ml, but both BMP-2 and BMP-4 did not affect cell proliferation at concentration as high as 10 ng/ml. The effect on hepatic stellate cell trans-differentiation was similar between TGFβ1 and BMPs. However, BMPs was more potent at transdifferentiation of hepatic stellate cells than TGF-β1. In addition, we observed that TGF-β1 transient reduced the abundance of SMA in hepatic stellate cells.CONCLUSION: TGF-β may be more important in regulation of hepatic stellate cell proliferation while BMPs may be the major cytokines regulating hepatic stellate cell transdifferentiation.
基金supported by National Natural Science Foundation of China (30973785)National Basic Research Program of China (973 Program,2009CB522900)Shanghai Leading Academic Discipline Project
文摘Objective： To observe the effect of moxibustion on the expressions of transforming growth factor-β （TGF-β） protein, and Smad4 protein and mRNA in rats with intestinal fibrosis in Crohn disease （CD）, and to discuss the action mechanism of acupuncture-moxibustion in treating intestinal fibrosis in CD from the perspective of TGF-β/Smads signal pathway. Methods： A CD intestinal fibrosis model was developed by using male SD rats of clean grade. The rats were randomized into a normal group, a model group, a mild moxibustion group, an electroacupuncture （EA） group, and a herb-partitioned moxibustion group. The rats in the normal and the model groups did not receive any interventions. Tianshu （ST 25） and Qihai （CV 6） were selected for the rats in the mild moxibustion group, the EA group, and the herb-partitioned moxibustion group. Mild moxibustion, EA, and herb-partitioned moxibustion were given respectively. After treatment, the expressions of TGF-β and Smad4 proteins in rat’s colon were detected by using immunohistochemistry （IHC）; the expression of Smad4 mRNA was determined by using fluorescence quantitative polymerase chain reaction （FQ-PCR）. Results： Compared with the normal group, the expressions of TGF-β protein, Smad4 protein and Smad4 mRNA significantly increased in the model group （P0.01）. Compared with the model group, the expressions of TGF-β protein, Smad4 protein, and Smad4 mRNA dropped markedly （P0.01 or P0.05） after treatments of mild moxibustion, EA, and herb-partitioned moxibustion. Conclusion： The expressions of TGF-β protein, Smad4 protein and Smad4 mRNA significantly increase in CD rats withintestinal fibrosis; while mild moxibustion, EA and herb-partitioned moxibustion at Tianshu （ST 25） and Qihai （CV 6） all can down-regulate the abnormal expressions.
