目的观察丹参提取物对小鼠吗啡身体依赖性的影响。方法反复sc吗啡建立小鼠吗啡身体依赖模型,以ip纳洛酮诱发其戒断症状。分别在建立吗啡依赖模型同时或建立后ip给予不同剂量的丹参提取物,观察长期预防性给药和急性给药对小鼠纳洛酮催促后戒断反应症状的影响,并且观察丹参提取物自身潜在的身体依赖性。结果和吗啡模型组相比,丹参提取物长期预防性给药(100~200 m g/kg),小鼠跳跃数减少(P<0.05),预防性给药(200 m g/kg)组体重下降也显著改善(P<0.05);急性给药(500 m g/kg)能明显减少吗啡依赖小鼠的跳跃数(P<0.05),急性给药(200~500 m g/kg)能一定程度改善体重的下降,但无统计学意义;丹参提取物长期给药不存在自身的身体依赖性。结论丹参提取物在一定程度上抑制小鼠吗啡身体依赖的形成,可以缓解吗啡依赖小鼠的戒断症状,且自身无潜在身体依赖性。

Objective To investigate the effect of Salvia miltiorrhiza extracts on morphine physical dependence in mice. Methods The physical dependence model was induced by repeated sc morphine daily in mice and then withdrawal symptom was induced by ip naloxone. Different doses of S. miltiorrhiza extracts were administrated by ip during or after the induction phase of morphine dependence, and effects of S. miltiorrhiza extracts both by preventive and acute administration on naloxone-precipiated withdrawal symptom in mice were investigated. The potential physical dependence of S. miltiorrhiza extracts was studied. Results Compared to morphine model group, preventive administration of S. miltiorrhiza extracts (100—200 mg/kg) could reduce the number of naloxone-induced withdrawal jumps (P0.05), and preventive administration of S. miltiorrhiza extracts (200 mg/kg) could significantly attenuate the weight loss of mice (P0.05); acute administration of S. miltiorrhiza extracts (500 mg/kg) could reduce the number of naloxone-induced withdrawal jumps, but only the dose (500 mg/kg) had statistical significance (P0.05). Acute administration of S. miltiorrhiza extracts (200—500 mg/kg) could attenuate the weight loss to a certain extent, but all had no statistical significance. Long-term administration of S. miltiorrhiza extracts had no potential of its own physical dependence. Conclusion S. miltiorrhiza extracts can inhibit the form of morphine physical dependence and relieve withdrawal symptom in morphine dependent mice, and has no potential of physical dependence.

福建省自然科学基金资助项目(C0410026)