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.
复制标题
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
中科院分区:
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
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.
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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
影响因子:
3.6
作者:
Roseboom,PH;Gnegy,ME
通讯作者:
Gnegy,ME
影响因子:
17.7
作者:
Volkow, ND;Chang, L;Pappas, N
通讯作者:
Pappas, N
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
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