Proteomic analysis and functional characterization of mouse brain mitochondria during aging reveal alterations in energy metabolism

Kelly L. Stauch, Phillip R. Purnell, Lance M. Villeneuve, Howard S Fox

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Mitochondria are the main cellular source of reactive oxygen species and are recognized as key players in several age-associated disorders and neurodegeneration. Their dysfunction has also been linked to cellular aging. Additionally, mechanisms leading to the preservation of mitochondrial function promote longevity. In this study we investigated the proteomic and functional alterations in brain mitochondria isolated from mature (5 months old), old (12 months old), and aged (24 months old) mice as determinants of normal "healthy" aging. Here the global changes concomitant with aging in the mitochondrial proteome of mouse brain analyzed by quantitative mass-spectrometry based super-SILAC identified differentially expressed proteins involved in several metabolic pathways including glycolysis, the tricarboxylic acid cycle, and oxidative phosphorylation. Despite these changes, the bioenergetic function of these mitochondria was preserved. Overall, this data indicates that proteomic changes during aging may compensate for functional defects aiding in preservation of mitochondrial function. The mass spectrometry proteomics data have been deposited to the ProteomeXchange Consortium with the data set identifier PXD001370 (http://proteomecentral.proteomexchange.org/dataset/PXD001370).

Original languageEnglish (US)
Pages (from-to)1574-1586
Number of pages13
JournalProteomics
Volume15
Issue number9
DOIs
StatePublished - May 1 2015

Keywords

  • Aging
  • Bioenergetics
  • Brain mitochondria
  • Quantitative proteomics

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

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