摘要
目的研究三七叶的三七皂苷(Arasaponins of Panaxnotoginsengleaves,APnL)对大鼠吗啡依赖及纳络酮催促戒断症状的抑制作用,以及对大鼠海马神经元内游离钙离子浓度([Ca2+]i)的影响,进一步探讨APnL抑制吗啡戒断症状的作用机制。方法应用剂量递增法皮下注射盐酸吗啡建立吗啡躯体依赖模型,腹腔注射纳络酮建立催促戒断模型。在使用吗啡的同时,采用(50、100和200mg/kg)3种剂量的APnL进行灌胃。第6天上午8∶00末次注射吗啡50mg/kg,观察各组催促戒断症状及体重减轻情况;1h后急性分离海马神经元,并采用流式细胞技术检测了APnL对吗啡依赖大鼠海马神经元[Ca2+]i的浓度。结果剂量递增法慢性吗啡处理5d后经ip NAL催促戒断后,与吗啡组相比可明显地诱发大鼠体重减轻和跳跃次数的发生(P<0.01)。②3种不同剂量APnL均可抑制大鼠戒断后体重减轻和跳跃的发生。③APnL可以有效地抑制纳络酮催促戒断所引起的大鼠海马神经元[Ca2+]i浓度的降低,200mg/kg剂量组作用最佳(P<0.01)。结论APnL可以缓解纳络酮催促戒断诱导的吗啡成瘾大鼠戒断症状的发生,同时可以抑制纳络酮催促戒断所引起的大鼠海马神经元[Ca2+]i浓度的降低。
Objective To study the effects of ara saponins of Panax notoginseng leaves（APnL） on inhibiting naloxone - precipitated morphine withdrawal symptoms in morphine dependent rats, rat,s and on intracellular calciumions in hippecampus of morphine withdrawal rats. Methods The models of morphine physical dependent rats and withdrawal syndrome were developed by subcutaneous injection of morphine in gradually increasing doses and intraperitoneal injection of naloxone, respectively. The rats were treated with APnL given intragastrically in vari- ous doses at the same time when they developed naloxone - precipitated morphine withdrawal symptoms. On day 6,50 mg/kg morphine was in- jected at 8：00, Withdrawal syndrome was precipitated by intraperitoneal injection of naloxone （5 mg/kg）, The withdrawal syndrome and body weight loss were observed.After 1 hour,the hippocampal neurons were prepared from acutely isolated hippocampus The contents of [ Ca2＋ ]i of different groups were measured by flow cytometry. Results （1）Naloxone was intraperitoneally injected,5 days after chronic treatment with escalating doses of morphine. The body weight loss and number of jumping of morphine withdrawn rats were increased compared with morphine group （ P 〈 0.01）. （2）Three doses of ApnL decreased the body weight loss and number of jumping.
（3） APnL downregulated contents of [ Ca2＋ ]i in hippocampus in naloxone - precipitated withdrawal rats. 200 mg/kg was the best dose. Conclusion APnL significantly relieve the naloxone - precipitated withdrawal syndrome in morphine dependent rats and inhibit contents of [ Ca2＋ ]i in hippocampus of naloxone - precipitated withdrawal rats.
出处
《武警医学》
CAS
2008年第4期306-308,共3页
Medical Journal of the Chinese People's Armed Police Force
基金
武警部队科研资助课题(WKH2005-4)
关键词
三七皂苷
吗啡依赖
纳络酮催促戒断
[CA2+]I
Arasaponins Panax notoginseng leaves Morphine dependence Naloxone- precipitated withdrawal Calcium ions
