Angebault 2018 Sci Signal

Angebault C, Fauconnier J, Patergnani S, Rieusset J, Danese A, Affortit CA, Jagodzinska J, Mégy C, Quiles M, Cazevieille C, Korchagina J, Bonnet-Wersinger D, Milea D, Hamel C, Pinton P, Thiry M, Lacampagne A, Delprat B, Delettre C (2018) ER-mitochondria cross-talk is regulated by the Ca2+ sensor NCS1 and is impaired in Wolfram syndrome. Sci Signal 11:eaaq1380.

» PMID: 30352948

Angebault C, Fauconnier J, Patergnani S, Rieusset J, Danese A, Affortit CA, Jagodzinska J, Megy C, Quiles M, Cazevieille C, Korchagina J, Bonnet-Wersinger D, Milea D, Hamel C, Pinton P, Thiry M, Lacampagne A, Delprat B, Delettre C (2018) Sci Signal

Abstract: Communication between the endoplasmic reticulum (ER) and mitochondria plays a pivotal role in Ca²⁺ signaling, energy metabolism, and cell survival. Dysfunction in this cross-talk leads to metabolic and neurodegenerative diseases. Wolfram syndrome is a fatal neurodegenerative disease caused by mutations in the ER-resident protein WFS1. Here, we showed that WFS1 formed a complex with neuronal calcium sensor 1 (NCS1) and inositol 1,4,5-trisphosphate receptor (IP₃R) to promote Ca²⁺ transfer between the ER and mitochondria. In addition, we found that NCS1 abundance was reduced in WFS1-null patient fibroblasts, which showed reduced ER-mitochondria interactions and Ca²⁺ exchange. Moreover, in WFS1-deficient cells, NCS1 overexpression not only restored ER-mitochondria interactions and Ca²⁺ transfer but also rescued mitochondrial dysfunction. Our results describe a key role of NCS1 in ER-mitochondria cross-talk, uncover a pathogenic mechanism for Wolfram syndrome, and potentially reveal insights into the pathogenesis of other neurodegenerative diseases.

• Bioblast editor: Plangger M • O2k-Network Lab: FR Montpellier Fauconnier J

Labels: MiParea: Respiration  Pathology: Neurodegenerative 

Organism: Human  Tissue;cell: Fibroblast  Preparation: Permeabilized cells  Enzyme: Complex I, Complex II;succinate dehydrogenase, Complex IV;cytochrome c oxidase 

Coupling state: LEAK, OXPHOS  Pathway: N, S, NS  HRR: Oxygraph-2k 

Labels, 2018-11