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机构地区:[1]无锡市精神卫生中心精神科,无锡214000 [2]昆明医科大学第一附属医院精神科 [3]中南大学湘雅二医院精神卫生研究所
出 处:《中华行为医学与脑科学杂志》2013年第6期481-483,共3页Chinese Journal of Behavioral Medicine and Brain Science
基 金:基金项目:国家自然科学基金重点项目(30870893)
摘 要:目的 观察成年期大鼠急性注射中低剂量地卓西平马来酸盐(MK-801)诱导的行为学变化,寻找塑造精神分裂症再认记忆缺陷模型适宜的药物剂量.方法 192只成年雄性大鼠以体质量按照分层随机化法分实验组和对照组,实验组给予不同剂量MK-801腹腔注射,对照组予生理盐水,独立进行旷场实验、前脉冲抑制(PPI)、新异物体识别实验.结果 1.给药后自发活动明显增加,表现出剂量依赖性的行为学效应,其中0.3 mg/kg组自发活动总距离[(127.04±32.35)m]在给药后显著高于对照组[(35.34±12.81)m,P<0.05].2.MK-801呈剂量依赖性地抑制了PPI的水平(P<0.01),0.1 mg/kg剂量组[(103.45±68.04)%]、0.3 mg/kg剂量组[(41.55±62.93)%]与盐水组[(200.39±30.97)%]比较差异有统计学意义(P<0.05).3.0.03 mg/kg剂量组分辨指数[(15.78±6.23)%]、0.1 mg/kg剂量组分辨指数[(22.42±3.85)%]显著低于盐水组[(39.42±3.86)%,P<0.05].结论 不同精神分裂症内表型需要选择恰当的MK-801剂量来模拟;0.03 mg/kg是模拟精神分裂症再认记忆缺陷模型相对适宜的剂量.Objective To observe the behavioral effects of acute administration of dizocilpine (MK-801) in rats,and to determine an appropriate doses of the drug to mimicking memory deficits of schizophrenia.Methods 192 rats were randomly divided into model groups and control group,and given different doses of MK-801 or saline.Locomotor activity,pre-pulse inhibition (PPI) test and novel object recognition test were studied respectively.Results The spontaneous activity increased in a dose-dependent manner after the treatment of MK-801.The total distances of locomotor activity in 0.3 mg/kg group((127.04 ± 32.35) m) exhibited a significant difference compared with control group((35.34 ± 12.81) m,P 〈 0.05).MK-801 decreased PPI in dose-dependent manner(P 〈 0.01).MK-801 0.1 mg/kg((103.45 ± 68.04) %) and 0.3 mg/kg ((41.55 ± 62.93) %) groups showed significant differences compared to control group ((200.39 ± 30.97) %) in PPI.The discrimination index of 0.03 mg/kg group((15.78 ± 6.23) %) and 0.1 mg/kg group((22.42 ± 3.85) %) were lower than that in control group((39.42 ±3.86)%,P〈0.05).Conclusion It is necessary for select right doses for model different endophenotypes of schizophrenia by MK-801.0.03 mg/kg of MK-801 is a relatively appropriate dosage to cause recognition memory damage.
分 类 号:R74[医药卫生—神经病学与精神病学] R9[医药卫生—临床医学]
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