Title : Nicotine prevents alpha-synuclein accumulation in mouse and human iPSC-derived dopaminergic neurons through activation of the dopamine D3- acetylcholine nicotinic receptor heteromer.

Pub. Date : 2019 Sep

PMID : 31051233






4 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 We recently found that in mouse dopaminergic neurons, the heteromer formed by the dopamine D3 receptor (D3R) and the beta2 subunit of acetylcholine nicotinic receptor (nAChR) exerts neurotrophic effects when activated by nicotine, leading to neurons with enlarged cell bodies and increased dendrite arborization. Nicotine cholinergic receptor, nicotinic, alpha polypeptide 7 Mus musculus
2 Beside this action, we now show that nicotine, by activating the D3R-nAChR heteromer, protects dopaminergic neurons against neuronal injury. Nicotine cholinergic receptor, nicotinic, alpha polypeptide 7 Mus musculus
3 In primary cultures of mouse dopaminergic neurons, in fact, the ability of nicotine to inhibit both the pathological accumulation of alpha-synuclein induced by glucose deprivation and the consequent morphological defects were strongly prevented by disrupting the D3R-nAChR heteromer with specific interfering TAT-peptides; the relevance of the phosphoinositide 3-kinase (PI3K) intracellular signaling in mediating nicotine prevention of alpha-synuclein aggregation has been also demonstrated. Nicotine cholinergic receptor, nicotinic, alpha polypeptide 7 Mus musculus
4 In this human cell model, nicotine exerts neuroprotective effects specifically acting through the D3R-nAChR complex thus indicating that this heteromer is a relevant molecular effector involved in the protection of human dopaminergic neurons. Nicotine cholinergic receptor, nicotinic, alpha polypeptide 7 Mus musculus