In vivo activation of midbrain dopamine neurons via sensitized, high-affinity alpha 6 nicotinic acetylcholine receptors.
In vivo activation of midbrain dopamine neurons via sensitized, high-affinity alpha 6 nicotinic acetylcholine receptors.
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DOI:
10.1016/j.neuron.2008.09.009
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发表时间:
2008-10-09
期刊:
影响因子:
16.2
通讯作者:
Lester HA
中科院分区:
文献类型:
--
作者:
Drenan RM;Grady SR;Whiteaker P;McClure-Begley T;McKinney S;Miwa JM;Bupp S;Heintz N;McIntosh JM;Bencherif M;Marks MJ;Lester HA
α6-containing (α6*) nicotinic ACh receptors (nAChRs) are selectively expressed in dopamine (DA) neurons and participate in cholinergic transmission. We generated and studied mice with gain-of-function α6* nAChRs, which isolate and amplify cholinergic control of DA transmission. In contrast to gene knockouts or pharmacological blockers, which show necessity, we show that activating α6* nAChRs and DA neurons is sufficient to cause locomotor hyperactivity. α6L9’S mice are hyperactive in their home cage and fail to habituate to a novel environment. Selective activation of α6* nAChRs with low doses of nicotine, by stimulating DA but not GABA neurons, exaggerates these phenotypes and produces a hyperdopaminergic state in vivo. Experiments with additional nicotinic drugs show that altering agonist efficacy at α6* provides fine-tuning of DA release and locomotor responses. α6*-specific agonists or antagonists may, by targeting endogenous cholinergic mechanisms, provide a new method for manipulating DA transmission in Parkinson’s disease, nicotine dependence, or attention deficit hyperactivity disorder.
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影响因子:
3.6
作者:
Gotti, C;Moretti, M;Whiteaker, P
通讯作者:
Whiteaker, P
DOI:
10.1124/jpet.301.2.651
发表时间:
2002-05-01
影响因子:
3.5
作者:
Grady, SR;Murphy, KL;Collins, AC
通讯作者:
Collins, AC
影响因子:
3.6
作者:
Drenan, Ryan M.;Nashmi, Raad;Lester, Henry A.
通讯作者:
Lester, Henry A.
DOI:
10.1073/pnas.041582598
发表时间:
2001-02-27
影响因子:
11.1
作者:
Labarca, C;Schwarz, J;Lester, HA
通讯作者:
Lester, HA
影响因子:
5.3
作者:
Champtiaux, N;Han, ZY;Changeux, JP
通讯作者:
Changeux, JP