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NDUFS4: creation of a mouse model mimicking a Complex I disorder.

Research paper by Christopher A CA Ingraham, Lindsay S LS Burwell, Jolanta J Skalska, Paul S PS Brookes, Robert L RL Howell, Shey-Shing SS Sheu, Carl A CA Pinkert

Indexed on: 23 May '09Published on: 23 May '09Published in: Mitochondrion



Abstract

The Complex I NADH dehydrogenase-ubiquinone-FeS 4 (NDUFS4) subunit gene is involved in proper Complex I function such that the loss of NDUFS4 decreases Complex I activity resulting in mitochondrial disease. Therefore, a mouse model harboring a point mutation in the NDUFS4 gene was created. An embryonic lethal phenotype was observed in homozygous (NDUFS4(-/-)) mutant fetuses. Mitochondrial function was impaired in heterozygous animals based on oxygen consumption, and Complex I activity in NDUFS4 mouse mitochondria. Decreased Complex I activity with unaltered Complex II activity, along with an accumulation of lactate, were consistent with Complex I disorders in this mouse model.