小体积肝切除促进肝硬化大鼠模型肝脏再生及肝功能恢复的实验研究

目的 观察小体积肝切除对肝硬化大鼠模型肝脏再生及肝功能恢复的影响.方法 采用CCl4腹腔注射方法制备肝硬化大鼠模型,肝硬化大鼠模型实施20％肝切除(n=30),以肝硬化假手术组(n=30)和正常大鼠20％肝切除组(n=30)作对照.在肝硬化模型制备至20％肝切除术后3个月的过程中,采用苏木精-伊红染色观察肝脏形态结构的变化,定期检测模型肝功能、凝血功能,采用Western blot、Re-al-time PCR检测肝细胞生长因子和转化生长因子-β以及增殖细胞核抗原在肝细胞中的表达情况,并与对照组进行比较.结果 在肝硬化模型制备过程中,苏木精-伊红染色提示大鼠肝脏逐渐呈现肝纤维化、肝硬化样改变;与正常大鼠比较,肝硬化动物模型中转化生长因子-β基因、蛋白表达逐渐增强.在接受20％肝切除术后3个月,肝硬化模型肝功能及凝血功能均较术前有所改善,同时TGF-β表达水平显著低于作为对照的肝硬化假手术组(P＜0.05),而肝细胞生长因子和增殖细胞核抗原基因、蛋白表达水平显著高于作为对照的肝硬化假手术组(P＜0.05).结论 小体积肝切除有助于促进肝硬化大鼠模型肝脏再生及肝功能的恢复,这为进一步深入开展小体积肝切除防治肝硬化进展的相关研究提供了新思路.

Effects of limited hepatectomy on liver regeneration and function recovery of cirrhotic rat model

Objective To assess the effects of limited hepatectomy on liver regeneration and function recovery of cirrhotic animal model.Methods Cirrhotic rat models were first prepared by intraperitoneal injection of CCL4.After that,the cirrhotic animal models underwent 20％ hepatectomy (n =30).The cirrhotic animals that underwent sham operation (n =30) and normal animals that underwent 20％ hepatectomy (n =30) were used as control groups.From the time when cirrhotic models were prepared to 3 months after 20％ hepatectomy,the hepatic function,coagulation function were tested regularly.Western blotting and real-time PCR were carried out to test the protein and gene expression of TGF-β,HGF and PCNA.Results Hepatic fibrosis and cirrhosis were observed during the preparation of cirrhotic rat models by intraperitoneal injection of CCL4.The hepatic function and coagulation function of cirrhotic models were partly recovered 3 month after 20％ hepatectomy.The gene and protein expression levels of TGF-β in the liver of animal model get higher during the preparation of cirrhotic rat models.However,the gene and protein expression levels of TGF-β get lower in cirrhotic model undergoing 20％ hepatectomy,when compared with that in cirrhotic animals (sham operation) and normal animals (20％ hepatectomy).Furthermore,the gene and protein expression levels of HGF and PCNA get higher in cirrhotic model undergoing 20％ hepatectomy,when compared with that in cirrhotic animals (sham operation) and normal animals (20％ hepatectomy).Conclusions Experimental limited hepatectomy facilitates the liver regeneration and function recovery of cirrhotic animal model,which may provide a novel method for the prevention and treatment of cirrhosis using limited hepatectomy technique.