Basal Ganglia
In the basal ganglia, for instance, dopaminergic transmission is ultimately regulated by the activity of specific nAChR subtypes in different neurons and neuronal compartments (Fig. 5). Thus evidence exists that in the VTA,alpha6- andalpha4-containing nAChRs are mainly located on dopaminergic nerve terminals, whereas alpha7 nAChRs are primarily expressed on the soma of dopaminergic neurons (Fig. 5). PubMed:19126755
AD involves loss of cholinergic cells not only in the cortex but also in subcortical nuclei. Up to 50% loss of neurons and of ChAT activity has been reported at autopsy in the locus ceruleus of brains from patients with AD compared with brains from subjects without AD, whereas no change was observed for adrenergic brainstem nuclei (Strong et al., 1991). PubMed:19293145
AD involves loss of cholinergic cells not only in the cortex but also in subcortical nuclei. Up to 50% loss of neurons and of ChAT activity has been reported at autopsy in the locus ceruleus of brains from patients with AD compared with brains from subjects without AD, whereas no change was observed for adrenergic brainstem nuclei (Strong et al., 1991). PubMed:19293145
Indeed, presynaptic effects of nAChRs in regulating dopamine release in basal ganglia and prefrontal cortex likely participate in nicotine’s addictive and cognitive effects, respectively (Jasinska et al., 2014) PubMed:28445721
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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.