FTY720对免疫性肝损伤保护作用的研究

目的　应用免疫性肝损伤模型研究FTY72 0对肝脏的保护作用并对其作用机制进行初步探讨。方法　分别以BCG +LPS和ConA诱导两种免疫性肝损伤模型并通过测定血清中ALT和AST水平的变化检测FTY72 0对两种肝损伤的保护作用。以ELISA方法测定血清中细胞因子IFN γ及IL 4水平的变化并应用淋巴细胞增殖实验检测FTY72 0对淋巴细胞增殖能力的影响。结果　FTY72 0可以使两种肝损伤模型中升高的血清ALT和AST水平下降 ,并可以降低肝损伤时血清中IFN γ及IL 4的水平 ,实验还证明FTY72 0可以抑制淋巴细胞的增殖。结论　FTY72 0预防应用对免疫性肝损伤有保护作用 ,其保肝作用机制可能和抑制淋巴细胞的增殖 ,进一步抑制细胞因子的产生有关

Studies of protective effect of FTY720 on immunological liver injury

AIM This study was undertaken to investigate the protective effect against ConcanavalinA (ConA) or BCG+LPS induced liver injury in mice by FTY720 and possible mechanisms. METHODS The serum ALT and its AST level changes were measured in two kinds of immunological liver injury models. The serum IFN γ and IL 4 changes were determined by ELISA and tested the effect of FTY720 on lymphocyte proliferation. RESULTS FTY720 dose dependently reduced serum ALT, AST levels in ConA or BCG+LPS induced liver injury in mice. It was also found that FTY720 decreases serum IFN γ and IL 4 levels during liver injury. The results also proved that FTY720 was able to inhibit lymphocyte proliferation. CONCLUSION Pretreatment with FTY720 could protect the mice from immunological liver injury. The possible mechanisms of its action are related to inhibiting lymphocyte proliferation and cytokines production.