Mechanisms underlying metabolic and neural defects in zebrafish and human multiple Acyl-CoA dehydrogenase deficiency (MADD)

Yuanquan Song, Mary A. Selak, Corey T. Watson, Christopher Coutts, Paul C. Scherer, Jessica A. Panzer, Sarah Gibbs, Marion O. Scott, Gregory Willer, Ronald G. Gregg, Declan W. Ali, Michael J. Bennett, Rita J. Balice-Gordon

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

In humans, mutations in electron transfer flavoprotein (ETF) or electron transfer flavoprotein dehydrogenase (ETFDH) lead to MADD/glutaric aciduria type II, an autosomal recessively inherited disorder characterized by a broad spectrum of devastating neurological, systemic and metabolic symptoms. We show that a zebrafish mutant in ETFDH, xavier, and fibroblast cells from MADD patients demonstrate similar mitochondrial and metabolic abnormalities, including reduced oxidative phosphorylation, increased aerobic glycolysis, and upregulation of the PPARG-ERK pathway. This metabolic dysfunction is associated with aberrant neural proliferation in xav, in addition to other neural phenotypes and paralysis. Strikingly, a PPARG antagonist attenuates aberrant neural proliferation and alleviates paralysis in xav, while PPARG agonists increase neural proliferation in wild type embryos. These results show that mitochondrial dysfunction, leading to an increase in aerobic glycolysis, affects neurogenesis through the PPARG-ERK pathway, a potential target for therapeutic intervention.

Original languageEnglish
Article numbere8329
JournalPLoS ONE
Volume4
Issue number12
DOIs
StatePublished - 2009
Externally publishedYes

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