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Angebault, Claire; Guichet, Pierre-Olivier; Talmat-Amar, Yasmina; Charif, Majida; Gerber, Sylvie; Fares-Taie, Lucas; Gueguen, Naig; Halloy, François; Moore, David; Amati-Bonneau, Patrizia; Manes, Gael; Hebrard, Maxime; Bocquet, Béatrice; Quiles, Mélanie; Piro-Mégy, Camille; Teigell, Marisa; Delettre, Cécile; Rossel, Mireille; Meunier, Isabelle; Preising, Markus; Lorenz, Birgit; Carelli, Valerio; Chinnery, Patrick F.; Yu-Wai-Man, Patrick; Kaplan, Josseline; Roubertie, Agathe; Barakat, Abdelhamid; Bonneau, Dominique; Reynier, Pascal; Rozet, Jean-Michel; Bomont, Pascale; Hamel, Christian P.; Lenaers, Guy
American journal of human genetics, 11/2015, Letnik: 97, Številka: 5Journal Article
Autosomal-recessive optic neuropathies are rare blinding conditions related to retinal ganglion cell (RGC) and optic-nerve degeneration, for which only mutations in TMEM126A and ACO2 are known. In four families with early-onset recessive optic neuropathy, we identified mutations in RTN4IP1, which encodes a mitochondrial ubiquinol oxydo-reductase. RTN4IP1 is a partner of RTN4 (also known as NOGO), and its ortholog Rad8 in C. elegans is involved in UV light response. Analysis of fibroblasts from affected individuals with a RTN4IP1 mutation showed loss of the altered protein, a deficit of mitochondrial respiratory complex I and IV activities, and increased susceptibility to UV light. Silencing of RTN4IP1 altered the number and morphogenesis of mouse RGC dendrites in vitro and the eye size, neuro-retinal development, and swimming behavior in zebrafish in vivo. Altogether, these data point to a pathophysiological mechanism responsible for RGC early degeneration and optic neuropathy and linking RTN4IP1 functions to mitochondrial physiology, response to UV light, and dendrite growth during eye maturation.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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