围手术期肠内免疫营养对肝硬化肝切除大鼠肝再生的影响

目的：探讨围手术期内使用肠内免疫营养支持对肝硬化肝切除大鼠肝再生功能的影响。方法：48只肝硬化大鼠随机均分为两组。A组为标准肠内营养组，B组为肠内免疫营养组。依标本采集时间的先后， A, B组再各分为4个亚组。两组大鼠用等热量肠内营养剂喂养8d 后行68％肝切除术，术后再喂养至取标本时间。分别于术前、术后1, 4和8d 取相应亚组大鼠肝组织标本，检测肝细胞有丝分裂指数(MI)和增殖细胞核抗原(PCNA)阳性细胞数。结果：两组大鼠肝切除术后残肝表现出一定的再生能力。B组肝细胞MI和PCNA阳性细胞计数在术后4d 和8d 显著高于A组(P<0.05)。结论：围手术期肠内免疫营养支持较之标准肠内营养支持更能增强肝硬化肝切除大鼠残肝再生能力，使肝再生在术后较长时间内保持高水平。

The effect of perioperative enteral immunonutrition on liver regeneration function in cirrhotic rats with partial hepatectomy

Objective To evaluate the effect of perioperative enteral immunotrition(IMPACT) on liver regeneration in cirrhotic rats with hepatectomy. Methods Forty-eight cirrhotic rats were randomly divided into two groups: Group A, perioperative standard enteral nutrition group(n=24), receiving standard enteral nutrient NUTRISON during hepatectomy. Group B, perioperative enteral immunonutrition group(n=24), receiving enteral immunonutrient IMPACT after hepatectomy. According to the different time of taking specimens, each group was separated into four subgroups, each subgroup had six rats. The rats in the two groups received equal daily nutritional supplement intragastrically, which was 690kJ/kg per day. Before the 68% hepatectomy, the rats were fed with enteral nutrient for 8 days, and after operation were fed until the day of taking specimens. On the day before hepatectomy and 1st, 4th and 8th postoperative day(POD), MI (mitotic index) of liver cell and PCNA (proliferating cell nuclear antigen) labeling index of hepatocyte were determined. Results MI increased significantly in both group on 4th and 8th postoperative day(P<0.05), with the maximal value on 4th day after hepatectomy. The values of MI in B3 and B4 subgroups were significantly higher than those in A3 and A4 subgroups(P<0.05). PCNA labeling index increased significantly in both groups on 1st, 4th and 8th day(P<0.05), with the maximal value on 1st day after hepatectomy. The values of PCNA labeling index in B3 and B4 subgroups were significantly higher than those in A3 and A4 subgroups(P<0.05). Conclusions Compared with perioperative standard enteral nutrition, perioperative enteral immunonutrition can enhance the regeneration capacity of the remnant liver and maintain a high ability of regeneration for a longer time after resection of cirrhotic liver of rats.