alexa Early aging and age-related pathologies in mice deficient in BMAL1, the core componentof the circadian clock.
Molecular Biology

Molecular Biology

Journal of Cytology & Histology

Author(s): Kondratov RV, Kondratova AA, Gorbacheva VY, Vykhovanets OV, Antoch MP

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Abstract Mice deficient in the circadian transcription factor BMAL1 (brain and muscle ARNT-like protein) have impaired circadian behavior and demonstrate loss of rhythmicity in the expression of target genes. Here we report that Bmal1(-/-) mice have reduced lifespans and display various symptoms of premature aging including sarcopenia, cataracts, less subcutaneous fat, organ shrinkage, and others. The early aging phenotype correlates with increased levels of reactive oxygen species in some tissues of the Bmal1(-/- )animals. These findings, together with data on CLOCK/BMAL1-dependent control of stress responses, may provide a mechanistic explanation for the early onset of age-related pathologies in the absence of BMAL1.
This article was published in Genes Dev and referenced in Journal of Cytology & Histology

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