Abstract
PINK1 is mutated in Parkinson's disease (PD), and mutations cause mitochondrial defects that include inefficient electron transport between complex I and ubiquinone. Neurodegeneration is also connected to changes in lipid homeostasis, but how these are related to PINK1-induced mitochondrial dysfunction is unknown. Based on an unbiased genetic screen, we found that partial genetic and pharmacological inhibition of fatty acid synthase (FASN) suppresses toxicity induced by PINK1 deficiency in flies, mouse cells, patient-derived fibroblasts, and induced pluripotent stem cell-derived dopaminergic neurons. Lower FASN activity in PINK1 mutants decreases palmitate levels and increases the levels of cardiolipin (CL), a mitochondrial inner membrane-specific lipid. Direct supplementation of CL to isolated mitochondria not only rescues the PINK1-induced complex I defects but also rescues the inefficient electron transfer between complex I and ubiquinone in specific mutants. Our data indicate that genetic or pharmacologic inhibition of FASN to increase CL levels bypasses the enzymatic defects at complex I in a PD model.
| Original language | English |
|---|---|
| Journal | Journal of Cell Biology |
| Volume | 216 |
| Issue number | 3 |
| Pages (from-to) | 1-14 |
| Number of pages | 14 |
| ISSN | 0021-9525 |
| DOIs | |
| Publication status | Published - 01.01.2017 |
Funding
We thank G. Marschner, F. Rudolph, R. Goodchild, H. Bellen, J. Park, J. Chung, and the Bloomington Drosophila Stock Center. Support was provided by a Fonds Wetenschappelijk Onderzoek and European Molecular Biology Organization stipend to M. Vos (ALTF 851-2014), a European Research Council Starting and Consolidator grant to P. Verstreken (ERC-2014-CoG-646671), Fonds Wetenschappelijk Onderzoek grants (G0D3417N, G0D3317N, G088515N, and G094915N), an Interuniversitaire Attractie Pool by Federaal Wetenschapsbeleid (P7/16), the Research Fund Katholieke Universiteit Leuven, a Methusalem grant from the Flemish government, the Hercules Foundation, Opening the Future, Deutsche Forschungsgemeinschaft (KL1134/11-1), and the Vlaams Instituut voor Biotechnologie. B. De Strooper is a paid consultant for and P. Verstreken receives research funding from Janssen Pharmaceuticals. C. Klein is the recipient of a career development award from the Hermann and Lilly Schilling Foundation.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
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SDG 10 Reduced Inequalities
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