Decreased striatal dopamine D1 receptor-stimulated adenylyl cyclase activity in human methamphetamine users.

Decreased striatal dopamine D1 receptor-stimulated adenylyl cyclase activity in human methamphetamine users.
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人类冰毒使用者纹状体多巴胺 D1 受体刺激的腺苷酸环化酶活性降低。

DOI:
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发表时间:
2003
影响因子:
17.7
通讯作者:
S. Kish
S. Kish
中科院分区:
医学1区
文献类型:
--
作者:
J. Tong;B. Ross;G. Schmunk;F. Peretti;K. Kalasinsky;Y. Furukawa;L. Ang;Sally S. Aiken;Dennis J. Wickham;S. Kish

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目的 有人认为,与反复接触多巴胺能精神兴奋剂药物相关的一些行为变化可能是由多巴胺受体活性的变化来解释的,包括多巴胺D(1)受体,它通过刺激性G蛋白与效应酶腺苷酸环化酶相连。为了确定人类甲基苯丙胺使用者的多巴胺D(1)受体功能是否会改变,作者测量了长期使用该药物的人类大脑中多巴胺刺激的腺苷酸环化酶活性。 方法 在16名最近和长期使用过该药物的甲基苯丙胺使用者的死后脑组织中测定了多巴胺和鸟苷酰亚氨基二磷酸(以评估G蛋白和腺苷酸环化酶偶联)刺激的腺苷酸环化酶活性(即,至少1年)以及21名匹配的对照受试者。 结果 多巴胺刺激腺苷酸环化酶活性的最大程度降低25%-30%,见于甲基苯丙胺使用者的纹状体(中脑核、尾状核和壳核)。未发现基础或鸟苷酰亚氨基二磷酸刺激的酶活性的变化。 结论 这些数据表明,多巴胺受体的功能与腺苷酸环化酶是部分脱敏在人类甲基苯丙胺用户的纹状体。多巴胺D(1)受体功能下降可能是已知的(药物戒断综合征)或预期的(药物耐受性)人类甲基苯丙胺暴露的后果的一部分。
OBJECTIVE It has been assumed that some behavioral changes associated with repeated exposure to dopaminergic psychostimulant drugs might be explained by changes in activity of dopamine receptors, including the dopamine D(1) receptor, which is linked by a stimulatory G protein to the effector enzyme adenylyl cyclase. To establish whether dopamine D(1) receptor function might be altered in human methamphetamine users, the authors measured dopamine-stimulated adenylyl cyclase activity in the brain of chronic human users of the drug. METHOD Adenylyl cyclase activity stimulated by dopamine and by guanylyl-imidodiphosphate (to assess G protein and adenylyl cyclase coupling) was determined in the postmortem brain tissue of 16 methamphetamine users who had used the drug both recently and chronically (i.e., at least 1 year) as well as 21 matched comparison subjects. RESULTS A 25%-30% decrease in the maximal extent of dopamine stimulation of adenylyl cyclase activity was seen in the striatum (nucleus accumbens, caudate, and putamen) of the methamphetamine users. No changes were found in basal or guanylyl-imidodiphosphate-stimulated enzyme activity. CONCLUSIONS These data suggest that dopamine receptor function linked to adenylyl cyclase is partially desensitized in the striatum of human methamphetamine users. Decreased dopamine D(1) receptor function might underlie part of the known (drug withdrawal syndrome) or expected (drug tolerance) consequences of methamphetamine exposure in humans.
DOI: --
发表时间: 1999-10
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
N. Volkow;N. Volkow;Gene-Jack Wang;J. Fowler;J. Logan;S. Gatley;C. Wong;R. Hitzemann;N. Pappas
通讯作者: N. Volkow;N. Volkow;Gene-Jack Wang;J. Fowler;J. Logan;S. Gatley;C. Wong;R. Hitzemann;N. Pappas
急性体内苯丙胺产生多巴胺受体偶联腺苷酸环化酶活性的同源脱敏作用,并减少激动剂与 D1 位点的结合。
DOI: --
发表时间: 1989
影响因子: 3.6
作者:
Roseboom,PH;Gnegy,ME
通讯作者: Gnegy,ME
DOI: 10.1176/appi.ajp.158.12.2015
发表时间: 2001-12-01
影响因子: 17.7
作者:
Volkow, ND;Chang, L;Pappas, N
通讯作者: Pappas, N
急性安非他明给药后大鼠纹状体多巴胺刺激的腺苷酸环化酶脱敏。
DOI: --
发表时间: 1986
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Barnett,JV;Kuczenski,R
通讯作者: Kuczenski,R
重复给予安非他明会改变大鼠纹状体中 D1 刺激的腺苷酸环化酶活性与钙调蛋白之间的相互作用。
DOI: --
发表时间: 1990
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Roseboom,PH;Hewlett,GH;Gnegy,ME
通讯作者: Gnegy,ME