实验性肝纤维化中碱性成纤维细胞生长因子的免疫组化研究

目的研究实验性肝纤维化时碱性成纤维细胞生长因子（ｂＦＧＦ）在肝脏的表达．方法实验大鼠分肝硬变组（２４只）和正常对照组（８只），肝硬变组采用复合因子制作出肝硬变动物病理模型，通过免疫组化研究了ｂＦＧＦ在肝纤维化过程中的表达．同时还通过结蛋白（Ｄｅｓｍｉｎ，ＤＭ），ＥＤ１的免疫组化变化，反映肝纤维化过程中储脂细胞和肝枯否细胞增生情况．结果随着肝纤维化发展，ＤＭ，ＥＤ１和ｂＦＧＦ阳性细胞在肝窦，坏死区和纤维间隔逐渐增多，ｂＦＧＦ阳性细胞主要是在那些ＤＭ阳性细胞和ＥＤ１阳性细胞中表达，定量分析，各组均高于正常组，以６周组最高，ＥＤ１阳性细胞与ｂＦＧＦ和ＤＭ阳性细胞的变化成正相关关系（ｒ＝０９７７和ｒ＝０９８９，Ｐ＜００５），ｂＦＧＦ阳性细胞和ＤＭ阳性细胞的变化也成正相关关系（ｒ＝０９９７，Ｐ＜００５）．结论在肝纤维化发生时由于肝枯否细胞和储脂细胞的增生及二者表达ｂＦＧＦ增加，再通过ｂＦＧＦ的自分泌和旁分泌作用进一步造成储脂细胞的增生和ＥＣＭ的产生增加．

Immunohistochemical study on basic fibroblast growth factor in experimental liver fibrosis

AIM To investigate the expression of basic fibroblast growth factor (bFGF) in the experimental rat liver fibrosis. METHODS We studied the expression of bFGF by immunohistochemical methods in experimental rat liver fibrosis ( n =24) induced by CCl 4 and diebitio factors and normal rat livers ( n =8). Proliferation of Kupffer cells and lipocytes was also studied with antibodies of ED1 and DM by the same methods. RESULTS In liver fibrosis group, the number of ED1, DM and bFGF positive cells was increased progressively in sinusoids, necrosis area and fibrous septa, and both ED1 and DM positive cells expressed bFGF. Quantitative analysis showed that the number of bFGF, ED1 and DM positive cells of all groups of experimental liver fibrosis was much higher than that of control group, which peaked at the end of 6 weeks. The changes of the three components were positively correlated. CONCLUSION Liver fibrosis was related to the proliferation of both Kupffer cells and lipocytes and their expression of bFGF.