RESUMO
Objective To explore the effect of 1-alpha,25-dihydroxy-cholecalcifero(1,25(OH)2D3)on liver fibrosis and its mechanism. Methods Degree of liver fibrosis was assessed through pathological detection and blood biochemical examination of liver function. Immunohistochemical assay was used to detect expressions of α-SMA,TGF-βand collagen I to observe activation level of hepatic stellate cells. Impact of 1,25(OH)2D3 on CD4+T cell differentiation was analyzed by flow cytometry,ELISA,and RT-PCR. Results 1,25(OH)2D3 improved the structure of the liver tissue and liver fibrosis. Expressions of collagen I ,TGF-βandα-SMA were significantly ele-vated in the liver tissue in rats with fibrosis(P 0.01);and ex-pressions of RORγt and T-bet decreased whereas GATA3 expression increased(P>0.01);as compared with those in the control group. Conclusions 1,25(OH)2D3 can alleviate the degree of liver tissue by lowering HSC activation and regulating Th cell differentiation.
RESUMO
Objective Through smdying the distribution of the Sappan acetic ether extract in transplanted heart of rats,to discuss selectivity of sappan in donor's hearts.Methods Improved Ono model was used to replicate the heart transplantation model of rats.Successfully operated rats were separated into 2 groups:a model group and a sappan group.Distributions of sappan in transplanted heart were observed by HPLC-FPC.Results One kind of original substance.of sappan was detected in transplanted heart sample,but not in un-transplanted hearts.Conclusion The substance of sappan may have selectivity in transplanted heart.