促肝细胞生长素、IFN及IL－2对成纤维细胞增殖和分泌作用

The Effects of PHGF、IFN and IL-2 on Function of Fibroblastes Proliferation and Secretion

本文探讨了促肝细胞生长素（ＰＨＧＦ）、重组干扰素ａ－２ｂ（ＩＦＮ）及白细胞介素２（ＩＬ─２）对体外培养成纤维细胞增殖的作用。结果表明，ＩＦＮ和ＩＬ─２可促进细胞的增殖和核分裂，发挥丝裂原作用。ＰＨＧＦ则抑制细胞增殖和核分裂，线粒体和粗面内质网变性，其培养上清羟脯氨酸（ＨＹＰ）水平降低。提示ＰＨＧＦ通过抑制成纤维细胞增殖和细胞产生ＨＹＰ的分泌作用，而发挥抗纤维化作用。Ｐ＜０．０１。讨论肝纤维化早期，细胞因子网络异常可导致肝纤维化的发生和发展〔２〕。据ＣｇａｊａＭＪ氏研究，ＩＦＮγ可减少胶原ｍＲＮＡ水平，抑制肝内纤维的产生〔３〕高春芳等报道，ＩＦＮ可促进体外培养肝细胞和Ｔ３细胞增殖，其机制不清〔４〕。ＩＬ─２是由Ｔ细胞产生的淋巴因子，在机体免疫调节中发挥重要作用。已有报道，慢性乙肝病人ＩＬ─１活性增强，与肝纤维化程度有关。其ＩＬ─２活性低下，与肝纤维化无相关性。〔５〕。本文结果表明，ＩＦＮ和ＩＬ─２单独作用于成纤维细胞，均促进细胞分裂，使其数量增多，核分裂明显增多，并使线粒体数量增多。线粒体的增生，可活跃细胞的生物氧化功能和蛋白质合成，促进其代谢和分化，从而发挥丝裂原的作用。ＨＹＰ是体内胶原纤维的主要成分，其含?

The effects of Hepatocyte growth promoting factors (PHGF)、recombinant human interferon α─2b(IFN) and interleukin 2 (IL-2)on fibroblasts proliferation and secretion hydroxyproline (HYP) were studied in this research. The investigation showd both IFN and IL-2enhanced number of cells and stimulated fission of nuclear. PHGF inhibited significant nuclear fission of fibroblastes and results in injury of mitodrion and endoplastic reticulum. The level of HYP in PHGF group is lower than this of controls.It is suggested that PHGF minght inhibite function of proliferation and secretion of fibroblastes and be a drug of anti─fibrosis.