NAD supplementation improves mitochondrial performance of cardiolipin mutants.

Cardiolipin (CL) deficiency causes mitochondrial dysfunction and aberrant metabolism that are associated in humans with the severe disease Barth syndrome (BTHS). Several metabolic abnormalities are observed in BTHS patients and model systems, including decreased oxidative phosphorylation, reduced tricarboxylic acid (TCA) cycle flux, and accumulated lactate and D-β-hydroxybutyrate, which strongly suggests that nicotinamide adenine dinucleotide (NAD) redox metabolism may be altered in CL-deficient cells. In this study, we identified abnormal NAD+ metabolism in multiple BTHS model systems and demonstrate that supplementation of NAD+ precursors such as nicotinamide mononucleotide (NMN) improves mitochondrial function. Improved mitochondrial function in the Drosophila model was associated with restored exercise endurance, which suggests a potential therapeutic benefit of NAD+ precursor supplementation in the management of BTHS patients. Copyright © 2022 Elsevier B.V. All rights reserved.

Citation

Jiajia Ji, Deena Damschroder, Denise Bessert, Pablo Lazcano, Robert Wessells, Christian A Reynolds, Miriam L Greenberg. NAD supplementation improves mitochondrial performance of cardiolipin mutants. Biochimica et biophysica acta. Molecular and cell biology of lipids. 2022 Apr;1867(4):159094

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PMID: 35051613

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