Title : Long-term nicotine treatment differentially regulates striatal alpha6alpha4beta2* and alpha6(nonalpha4)beta2* nAChR expression and function.

Pub. Date : 2008 Sep

PMID : 18583454






11 Functional Relationships(s)
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1 Long-term nicotine treatment differentially regulates striatal alpha6alpha4beta2* and alpha6(nonalpha4)beta2* nAChR expression and function. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
2 Nicotine treatment has long been associated with alterations in alpha4beta2(*) nicotinic acetylcholine receptor (nAChR) expression that modify dopaminergic function. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
3 Nicotine treatment has long been associated with alterations in alpha4beta2(*) nicotinic acetylcholine receptor (nAChR) expression that modify dopaminergic function. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
4 However, the influence of long-term nicotine treatment on the alpha6beta2(*) nAChR, a subtype specifically localized on dopaminergic neurons, is less clear. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
5 Here we used voltammetry, as well as receptor binding studies, to identify the effects of nicotine on striatal alpha6beta2(*) nAChR function and expression. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
6 In contrast, in nicotine-treated rats, alpha6beta2(*) nAChR blockade elicited a similar pattern of dopamine release with nonburst and burst firing. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
7 (125)I-alpha-CtxMII competition studies in striatum of knockout mice showed that nicotine treatment decreased the alpha6alpha4beta2(*) subtype but increased the alpha6(nonalpha4)beta2(*) nAChR population. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
8 These data indicate that alpha6beta2(*) nAChR-evoked dopamine release in nicotine-treated rats is mediated by the alpha6(nonalpha4)beta2(*) nAChR subtype and suggest that the alpha6alpha4beta2(*) nAChR and/or alpha4beta2(*) nAChR contribute to the differential effect of higher frequency stimulation on dopamine release under control conditions. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
9 These data indicate that alpha6beta2(*) nAChR-evoked dopamine release in nicotine-treated rats is mediated by the alpha6(nonalpha4)beta2(*) nAChR subtype and suggest that the alpha6alpha4beta2(*) nAChR and/or alpha4beta2(*) nAChR contribute to the differential effect of higher frequency stimulation on dopamine release under control conditions. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
10 These data indicate that alpha6beta2(*) nAChR-evoked dopamine release in nicotine-treated rats is mediated by the alpha6(nonalpha4)beta2(*) nAChR subtype and suggest that the alpha6alpha4beta2(*) nAChR and/or alpha4beta2(*) nAChR contribute to the differential effect of higher frequency stimulation on dopamine release under control conditions. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus
11 These data indicate that alpha6beta2(*) nAChR-evoked dopamine release in nicotine-treated rats is mediated by the alpha6(nonalpha4)beta2(*) nAChR subtype and suggest that the alpha6alpha4beta2(*) nAChR and/or alpha4beta2(*) nAChR contribute to the differential effect of higher frequency stimulation on dopamine release under control conditions. Nicotine cholinergic receptor nicotinic alpha 2 subunit Rattus norvegicus