何首乌炮制前后对大鼠肝脏的损伤比较及敏感指标筛选

比较何首乌生品和炮制品对大鼠肝脏损伤作用的差异。以生何首乌、制何首乌75%乙醇提取物按可比生药量(50 g·kg-1),连续灌胃给药6周,动态检测血清生化指标,6周后检查肝脏组织病理学改变,并采用主成分分析筛选何首乌肝损伤的敏感指标。实验结果显示生何首乌组大鼠血清ALT,AST,ALP,DBIL,TBIL显著性升高(P<0.05或0.01);IBIL,TBA显著性降低(P<0.05或0.01);制何何首乌组血清各项指标变化不明显。病理组织分析显示生何首乌组肝组织结构破坏明显,局部可见肝细胞坏死;制何首乌组可见肝脏组织基本正常,未见明显病变现象。该研究发现制何首乌对大鼠肝脏的损伤作用显著低于生何首乌,提示炮制能有效降低何首乌肝毒性;转氨酶等传统肝功能指标对生何首乌肝损伤作用不敏感,血清DBIL,TBIL含量可早期反映出何首乌引起的肝损伤,且作为临床合理用药监测的敏感指标。

Comparison of processed and crude Polygoni Multiflori Radix induced rat liver injury and screening for sensitive indicators

To investigate the difference of liver injury in rats gavaged with crude and processed Polygoni Multiflori Radix. The 75% ethanol extract of crude and processed Polygoni Multiflori Radix (50 g·kg^-1 crude medicine weight/body weight) were continuous oral administered to rats for 6 weeks. Serum biochemical indicators were dynamically detected, the change of liver histopathology was assessed 6 weeks later. Principal component analysis (PCA) was adopted to screen sensitive indicator of the liver damage induced by polygoni multiflori radix. Biochemical tests showed that the crude Polygoni Multiflori Radix group had significant increase of serum ALT, AST, ALP, DBIL and TBIL (P<0.01 or P<0.05) and significant decreases of serum IBIL and TBA (P<0.01 or P<0.05), while the processed Polygoni Multiflori Radix group showed no obvious changes, compared to the untreated normal group. Histopathologic analysis revealed that crude Polygoni Multiflori Radix group exhibited significant inflammatory cells infiltration in portal area around the blood vessels, tissue destruction and local necrosis of liver cells. There were not obvious pathological changes in processed Polygoni Multiflori Radix group. The results demonstrated that the injury effect of processed Polygoni Multiflori Radix on liver injury of rats was significantly lower than that of unprocessed, and that processing can effectively reduce the hepatotoxicity of Polygoni Multiflori Radix. Traditional transaminase liver function indicators were not sensitive for crude Polygoni Multiflori Radix induced liver damage. The serum content of DBIL and TBIL can reflect the liver damage induced by crude Polygoni Multiflori Radix early and can be sensitive indicators for clinical monitoring the usage of it.