Mechanism research of alleviating rat liver ischemia-reperfusion injury by Astilbin / 国际外科学杂志

ABSTRACT

Objective To explore the protective effect of astilbin in hepatic ischemia-reperfusion injury (HIRI).Methods SD rats were divided into Sham group (control group),HIRI group (ischemia-reperfusion group),astilbe (low dose group,middle dose group,high dose group),and estabilished the model of rat HIRI.After liver were reperfused with blood (in 4 h,8 h,16 h),collecting the specimens of blood and liver tissues.Detection of serum alanine aminotransferase (ALT),aspertate aminotransferase (AST);Then observed the changes of liver cell microstructure;Western blot analysised the expression of HMGB1,TLR4,NF-kB,TNF-α in liver tissue.Results The serum ALT levels of Sham group in 4 h,8 h,16 h were (58.11 ±4.81) U/L,(57.12 ± 5.33) U/L,(57.63 ±4.54) U/L,the serum ALT levels of HIRI group in 4 h,8 h,16 h were (540.38 ± 21.41) U/L,(831.21 ± 20.11) U/L,(191.95 ± 15.35) U/L.Compared with Sham group,the serum ALT levels of HIRI group were significantly increased(P ＜ 0.01).Compared with HIRI group,The serum ALT levels of three dose groups in 4 h,8 h,16 h were significantly declined,including high dose group lower the most obvious (The serum ALT levels of high dose group in 4 h,8 h,16 h were (223.75 ± 10.53) U/L,(412.14 ±23.59) U/L,(205.25 ± 15.48) U/L (P ＜0.01).The results of light microscope indicated that drug groups significantly reduce the liver cell damage.The results of Western blot displayed that High dose group of HMGB1,TLR4 protein expression in 4 h,8 h,16 h drop significantly than HIRI group(P ＜0.05).High dose group of NFkB,TNF-α protein expression in postoperative 8 h,16 h decrease significantly than HIRI group (P ＜ 0.05),but in postoperative 8 h,there was no statistically significant difference compared with group HIRI (P＞0.05).Conclusion Astilbe pretreatment can reduce HIRI and its mechanism may be associated with downregulating the axis of HMGB1/TLR4/NF-kB/TNF-α,proceed to the next inhibiting the inflammatory response.