R-OH 葡萄糖醛酸
- 格式:ppt
- 大小:1.22 MB
- 文档页数:100
葡萄糖醛酸转移酶(UGTs) 诱导羧酸药物代谢激活的研究进展谢彤, 梁艳, 郝海平, 谢林, 王广基*(中国药科大学药物代谢动力学重点实验室, 江苏南京210009)摘要: 含羧酸基团的药物可以通过葡萄糖醛酸转移酶的代谢转化, 形成亲电子活性的酰基葡萄糖醛酸苷活性中间代谢产物, 然后经过一系列的非酶或酶反应形成蛋白加合物或DNA加合物。
加合物的形成是含羧酸基团药物形成特异质反应和基因毒性的主要因素。
本文以该类药物的代谢激活为例, 阐述了酰基葡萄糖醛酸苷的化学活性、致毒机制、分布特征以及产生的毒性反应, 并探讨了研究现状和前景。
关键词: 羧酸药物; 葡萄糖醛酸转移酶; 酰基葡萄糖醛酸苷; 代谢激活中图分类号: R969 文献标识码:A 文章编号: 0513-4870 (2009) 11-1193-07Advances in study of metabolic activation of carboxyl-acidcontaining drugs by UGTsXIE Tong, LIANG Y an, HAO Hai-ping, XIE Lin, WANG Guang-ji* (Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing 210009, China)Abstract: The metabolic transformation of the drugs containing carboxylic acid groups can lead to the formation of acyl glucuronide metabolites through catalysis by glucuronosyltransferase, and produce pro-acyl glucuronide intermediate metabolites with electronic activity. Then, protein or DNA adducts appeared after a series of non-enzyme or enzyme reactions. These adducts would change the protein activity and potentially lead to idiosyncratic and genotoxicity. In this paper, we discussed the chemical activity, drug-induced mechanisms, distribution and toxicity resulting from this metabolic activation for these drugs, and stated the status and prospects of research in this field.Key words: carboxyl-acid containing drug; uridine diphosphoglucuronosyl transferase; acyl glucuronide; metabolic activation肝脏是药物生物转化的主要场所, 许多药物经肝脏代谢酶生物转化后, 水溶性增加、毒性降低, 从而易于排出体外, 但一些药物在体内经生物转化产生了活性的中间代谢物, 这些活性代谢物会激活原癌基因、改变体内的信号转导通路或与相应的组织蛋白、DNA结合形成加合物从而诱发癌症、造成肝肾损伤等。