Title : In vivo chronic nicotine exposure differentially and reversibly affects upregulation and stoichiometry of α4β2 nicotinic receptors in cortex and thalamus.

Pub. Date : 2016 Sep

PMID : 27157710






5 Functional Relationships(s)
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1 Studies with heterologous expression systems have shown that the alpha4beta2 nicotinic acetylcholine receptor (nAChR) subtype can exist in two stoichiometries (with two [(alpha4)2(beta2)3] or three [(alpha4)3(beta2)2] copies of the alpha subunit in the receptor pentamer) which have different pharmacological and functional properties and are differently regulated by chronic nicotine treatment. Nicotine hemoglobin, beta adult minor chain Mus musculus
2 For cortex exposure to chronic nicotine elicited an increase in receptor density measured by (3)H-epibatidine binding, an increase in the alpha4 and beta2 protein levels, and an increase in beta2/alpha4 subunit ratio, that indicates an increased proportion of receptors with the (alpha4)2(beta2)3 stoichiometry. Nicotine hemoglobin, beta adult minor chain Mus musculus
3 For cortex exposure to chronic nicotine elicited an increase in receptor density measured by (3)H-epibatidine binding, an increase in the alpha4 and beta2 protein levels, and an increase in beta2/alpha4 subunit ratio, that indicates an increased proportion of receptors with the (alpha4)2(beta2)3 stoichiometry. Nicotine hemoglobin, beta adult minor chain Mus musculus
4 For cortex exposure to chronic nicotine elicited an increase in receptor density measured by (3)H-epibatidine binding, an increase in the alpha4 and beta2 protein levels, and an increase in beta2/alpha4 subunit ratio, that indicates an increased proportion of receptors with the (alpha4)2(beta2)3 stoichiometry. Nicotine hemoglobin, beta adult minor chain Mus musculus
5 These data suggest that chronic nicotine exposure in vivo favors increased assembly of alpha4beta2 nAChR containing three beta2 subunits. Nicotine hemoglobin, beta adult minor chain Mus musculus