p(MGI:Chrna4)
First, age-related nAChR subunit expression decline was observed in both strains, and this was dominated by diminished alpha4 nAChR expression. Second, long-term (12 mo) oral nicotine failed to reduce the age-related decline in the number of neurons expressing alpha4 nAChR subunits, although the neurons that remained exhibited larger processes with more varicosities than age-matched controls (165, 396). Acute nicotine treatment (alpha6 wk of oral nicotine) of aged mice had no measurable influence on nAChR expression, neuronal viability, or dendritic complexity (e.g., Ref. 396) PubMed:19126755
First, age-related nAChR subunit expression decline was observed in both strains, and this was dominated by diminished alpha4 nAChR expression. Second, long-term (12 mo) oral nicotine failed to reduce the age-related decline in the number of neurons expressing alpha4 nAChR subunits, although the neurons that remained exhibited larger processes with more varicosities than age-matched controls (165, 396). Acute nicotine treatment (alpha6 wk of oral nicotine) of aged mice had no measurable influence on nAChR expression, neuronal viability, or dendritic complexity (e.g., Ref. 396) PubMed:19126755
Mouse strains, like humans, also exhibit a striking age-related decline in nAChR expression. For instance, in the hippocampus of aged CBA and B6 mice, expression of alpha4 and alpha7 nAChR subunits decreases with age (166). PubMed:19126755
Tg2576 mice expressing human Abeta show reduced [3H]cytisine binding (a label of nAChRs) in the cortex at 17 months after birth (Apelt et al., 2002). In contrast, however, levels of alpha7 or alpha4 subunits were unchanged in double-mutant Swedish APP/PS-1 mice as determined by radiolabeled cytosine (alpha4beta2) or alpha-bungarotoxin (alpha7) binding (Marutle et al., 2002). PubMed:19293145
Mouse strains, like humans, also exhibit a striking age-related decline in nAChR expression. For instance, in the hippocampus of aged CBA and B6 mice, expression of alpha4 and alpha7 nAChR subunits decreases with age (166). PubMed:19126755
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.