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Effects of Sex, Strain, and Energy Intake on Hallmarks of Aging in Mice.


ABSTRACT: Calorie restriction (CR) is the most robust non-genetic intervention to delay aging. However, there are a number of emerging experimental variables that alter CR responses. We investigated the role of sex, strain, and level of CR on health and survival in mice. CR did not always correlate with lifespan extension, although it consistently improved health across strains and sexes. Transcriptional and metabolomics changes driven by CR in liver indicated anaplerotic filling of the Krebs cycle together with fatty acid fueling of mitochondria. CR prevented age-associated decline in the liver proteostasis network while increasing mitochondrial number, preserving mitochondrial ultrastructure and function with age. Abrogation of mitochondrial function negated life-prolonging effects of CR in yeast and worms. Our data illustrate the complexity of CR in the context of aging, with a clear separation of outcomes related to health and survival, highlighting complexities of translation of CR into human interventions.

SUBMITTER: Mitchell SJ 

PROVIDER: S-EPMC4911707 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Effects of Sex, Strain, and Energy Intake on Hallmarks of Aging in Mice.

Mitchell Sarah J SJ   Madrigal-Matute Julio J   Scheibye-Knudsen Morten M   Fang Evandro E   Aon Miguel M   González-Reyes José A JA   Cortassa Sonia S   Kaushik Susmita S   Gonzalez-Freire Marta M   Patel Bindi B   Wahl Devin D   Ali Ahmed A   Calvo-Rubio Miguel M   Burón María I MI   Guiterrez Vincent V   Ward Theresa M TM   Palacios Hector H HH   Cai Huan H   Frederick David W DW   Hine Christopher C   Broeskamp Filomena F   Habering Lukas L   Dawson John J   Beasley T Mark TM   Wan Junxiang J   Ikeno Yuji Y   Hubbard Gene G   Becker Kevin G KG   Zhang Yongqing Y   Bohr Vilhelm A VA   Longo Dan L DL   Navas Placido P   Ferrucci Luigi L   Sinclair David A DA   Cohen Pinchas P   Egan Josephine M JM   Mitchell James R JR   Baur Joseph A JA   Allison David B DB   Anson R Michael RM   Villalba José M JM   Madeo Frank F   Cuervo Ana Maria AM   Pearson Kevin J KJ   Ingram Donald K DK   Bernier Michel M   de Cabo Rafael R  

Cell metabolism 20160601 6


Calorie restriction (CR) is the most robust non-genetic intervention to delay aging. However, there are a number of emerging experimental variables that alter CR responses. We investigated the role of sex, strain, and level of CR on health and survival in mice. CR did not always correlate with lifespan extension, although it consistently improved health across strains and sexes. Transcriptional and metabolomics changes driven by CR in liver indicated anaplerotic filling of the Krebs cycle togeth  ...[more]

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