重组肝刺激因子对肝脏卵圆细胞增殖的作用

目的观察重组人肝刺激因子(hHSS)对肝脏卵圆细胞增殖的影响。方法分离大鼠肝卵圆细胞，加以培养，并进行细胞学鉴定。将重组的hHSS作用于肝脏卵圆细胞，以MTT法、流式细胞术观察其对卵圆细胞的增殖作用。结果实验分离的卵圆细胞同时表达肝细胞和胆管细胞特异性标志物。给予重组hHSS作用12～24h后，细胞增殖速度减缓，细胞DNA合成减弱，其作用的最有效浓度为240mg/L。结论重组hHSS能抑制卵圆细胞的增殖。

THE EFFECT OF RECOMBINANT HUMAN HEPATIC STIMULATOR SUBSTANCE ON GROWTH OF LIVER OVAL CELLS

Objective Hepatic stimulator substance(HSS)is newly defined as a growth mitogen to hepatocytes.This sutdy is aiming to investigate the effect of recombinant human hepatic stimulator substance(rhHSS) on growth of liver oval cells(OVCs). Methods OVCs were prepared from intoxicated rats with 3'-methyl-dimethylaminoazobenzene.After confirmation of OVC morphologically and histochemically,the cell cultures of OVC were exposed to various dosages of rhHSS for 12 and 24?h,respectively.The cellular proliferation was analyzed by MTT and flow cytometry. Results Administration of rhHSS(160-400 mg/L)inhibited the proliferation of OVC,as indicated by MTT and cell cycle analysis,the effect appeared non-dose dependent pattern.The peak of inhibition occurred at 240?mg/L.After incubation with 240?mg/L of HSS for 12 and 24?h,the percentages of S-phase were reduced 47.8% and 35.8% to those of the untreated cells.respectively.Conclusion rhHSS exhibits the inhibitory effect on growth of OVC.