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机体敏感性对药物毒性的影响

时间:2023-03-13 理论教育 版权反馈
【摘要】:除代谢因素对毒物的作用存在影响外,机体组织器官对毒物的敏感性也与毒物作用的结果有关。例如,给雄性小鼠腹腔注射丙戊酸钠按体重1 200mg/kg,发现在17:00注射时死亡率最高,09:00和01:00给药时死亡率最低。药动学研究未发现不同时间给药血浆和脑组织内丙戊酸浓度的变化。因此可以推断丙戊酸的毒性节律是由于中枢神经敏感性的变化所致。

除代谢因素对毒物的作用存在影响外,机体组织器官对毒物的敏感性也与毒物作用的结果有关。例如,给雄性小鼠腹腔注射丙戊酸钠按体重1 200mg/kg,发现在17:00注射时死亡率最高,09:00和01:00给药时死亡率最低。药动学研究未发现不同时间给药血浆和脑组织内丙戊酸浓度的变化。因此可以推断丙戊酸的毒性节律是由于中枢神经敏感性的变化所致。

(吴云明  汪建云)

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