한빛사논문
Mélissa Jasmin1,†, Eun Hee Ahn2,†, Merja H Voutilainen3,4,†, Joanna Fombonne1, Catherine Guix1, Tuulikki Viljakainen3,4, Seong Su Kang2, Li‐ying Yu3, Mart Saarma3, Patrick Mehlen*,‡,1 and Keqiang Ye*,‡,2
1Apoptosis, Cancer and Development Laboratory – Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052‐CNRS UMR5286, Centre Léon Bérard, Université de Lyon, Université de Lyon1, Lyon, France
2Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
3Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
4Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
†These authors contributed equally to this work
‡These authors contributed equally to this work as senior authors
*Corresponding author.
Abstract
The netrin‐1/DCC ligand/receptor pair has key roles in central nervous system (CNS) development, mediating axonal, and neuronal navigation. Although expression of netrin‐1 and DCC is maintained in the adult brain, little is known about their role in mature neurons. Notably, netrin‐1 is highly expressed in the adult substantia nigra, leading us to investigate a role of the netrin‐1/DCC pair in adult nigral neuron fate. Here, we show that silencing netrin‐1 in the adult substantia nigra of mice induces DCC cleavage and a significant loss of dopamine neurons, resulting in motor deficits. Because loss of adult dopamine neurons and motor impairments are features of Parkinson’s disease (PD), we studied the potential impact of netrin‐1 in different animal models of PD. We demonstrate that both overexpression of netrin‐1 and brain administration of recombinant netrin‐1 are neuroprotective and neurorestorative in mouse and rat models of PD. Of interest, we observed that netrin‐1 levels are significantly reduced in PD patient brain samples. These results highlight the key role of netrin‐1 in adult dopamine neuron fate, and the therapeutic potential of targeting netrin‐1 signaling in PD.
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