Conserved nicotine-activated neuroprotective pathways involve mitochondrial stress.

Conserved nicotine-activated neuroprotective pathways involve mitochondrial stress.
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DOI:
10.1016/j.isci.2021.102140
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发表时间:
2021-03-19
期刊:
影响因子:
5.8
通讯作者:
Treinin M
Treinin M
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Nourse JB Jr;Harshefi G;Marom A;Karmi A;Cohen Ben-Ami H;Caldwell KA;Caldwell GA;Treinin M

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Tobacco smoking is a risk factor for several human diseases. Conversely, smoking also reduces the prevalence of Parkinson’s disease, whose hallmark is degeneration of substantia nigra dopaminergic neurons (DNs). We use C. elegans as a model to investigate whether tobacco-derived nicotine activates nicotinic acetylcholine receptors (nAChRs) to selectively protect DNs. Using this model, we demonstrate conserved functions of DN-expressed nAChRs. We find that DOP-2, a D3-receptor homolog; MCU-1, a mitochondrial calcium uniporter; PINK-1 (PTEN-induced kinase 1); and PDR-1 (Parkin) are required for nicotine-mediated protection of DNs. Together, our results support involvement of a calcium-modulated, mitochondrial stress-activated PINK1/Parkin-dependent pathway in nicotine-induced neuroprotection. This suggests that nicotine-selective protection of substantia nigra DNs is due to the confluence of two factors: first, their unique vulnerability to mitochondrial stress, which is mitigated by increased mitochondrial quality control due to PINK1 activation, and second, their specific expression of D3-receptors. Establishment of a C. elegans model for nicotine-induced neuroprotection Dopaminergic neuron-expressed nAChRs exhibit conserved functions Nicotine-induced nAChR- and D3R-dependent signaling is neuroprotective in vivo Nicotine-induced protection involves mediators of mitochondrial quality control Biological Sciences; Neuroscience; Molecular Neuroscience
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