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Paillusson, Sébastien; Clairembault, Thomas; Biraud, Mandy; Neunlist, Michel; Derkinderen, Pascal
Journal of neurochemistry, 20/May , Letnik: 125, Številka: 4Journal Article
There is growing evidence supporting a role of extracellular alpha‐synuclein in the spreading of Parkinson's disease (PD) pathology. Recent pathological studies have raised the possibility that the enteric nervous system (ENS) is one of the initial sites of alpha‐synuclein pathology in PD. We therefore undertook this survey to determine whether alpha‐synuclein can be secreted by enteric neurons. Alpha‐synuclein secretion was assessed by immunoblot analysis of the culture medium from primary culture of ENS. We show that alpha‐synuclein is physiologically secreted by enteric neurons via a conventional, endoplasmic reticulum/Golgi‐dependent exocytosis, in a neuronal activity‐regulated manner. Our study is the first to evidence that enteric neurons are capable of secreting alpha‐synuclein, thereby providing new insights into the role of the ENS in the pathophysiology of PD. Current evidence suggests that extracellular alpha‐synuclein is critically involved in the spread of Parkinson's disease. As the enteric nervous system is affected early in Parkinson's disease, we undertook this research to investigate whether enteric neurons are capable of secreting alpha‐synuclein. Using primary culture of enteric nervous system, we show that alpha‐synuclein is physiologically secreted by enteric neurons in an activity‐regulated manner. Our results reinforce the assumption that the enteric nervous system might be implicated in the pathophysiology of Parkinson's disease. Read the Editorial Highlight for this article on doi: 10.1111/jnc.12191.
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