国产13C-美沙西丁呼气试验对小鼠急性肝损伤的评价

目的 建立一套简单易操作并在小鼠活体上进行的~(13)C呼气试验检测系统,并探讨国产~(13)C-美沙西丁呼气试验(~(13)C-MBT)对小鼠急性肝损伤的诊断价值.方法 ~(13)C-美沙西丁经扑热息痛甲烷化合成标记.采用四氯化碳(CCl_4)腹腔注射制作小鼠急性肝损伤模型,造模后饲养1个月复制小鼠急性肝损伤恢复模型,行肝脏病理组织学检查和肝功能血液生化学指标检测,于多个时间点采集活体小鼠~(13)C-美沙西丁灌胃后呼出的气体,以红外线能谱仪(IRIS)检测并绘制呼气峰值(DOB)曲线.结果 正常对照组小鼠于灌胃给药后6-8 min时呼气~(13)C达到峰值(51.9±2.04),随后缓慢下降至本底值;模型组于灌胃给药后16 min左右达到峰值(26.37±5.74),随后亦缓慢下降至本底值.两组间差异有统计学意义(P<0.05).当急性肝损伤恢复模型组和对照组小鼠在相同条件下饲养1个月后,重复~(13)C-美沙西丁呼气检测后两组DOB峰值及达峰时间差异无统计学意义(P>0.05).结论 ~(13)C-MBT可在小鼠活体状态下准确、方便地采集和检测呼出气体的~(13)CO_2变化,并正确评估其肝功能的损伤和恢复情况.

Evaluation of mouse acute liver damage by breath test with domestically synthesized 13C-methacetin

Objective To establish a convenient ~(13)C-breath test system in live mice,and investigate the value of ~(13)C-methacetin breath test(~(13)C-MBT) in the diagnosis of acute liver damage of mice with domestically synthesized ~(13)C-methacetin. Methods Domestically synthesized ~(13)C-methacetin was prepared from acamol by methylation.Abdominal injection of CCl_4 was adopted to duplicate acute liver damage of mice,then the mice were housed under normal laboratory condition for a whole month to gain recovery,whi...