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BMAL1-dependent regulation of the mTOR signaling pathway delays aging

Rohini V Khapre1, Anna A Kondratova, Sonal Patel

  • 1Center for Gene Regulation in Health and Diseases, BGES, Cleveland State University, Cleveland, OH.

Aging
|February 1, 2014
PubMed

Insights

The circadian clock

Area of Science:

  • Chronobiology
  • Molecular Biology
  • Aging Research

Background:

  • The circadian clock regulates physiological processes, but its role in aging is not fully understood.
  • BMAL1, a core circadian clock component, is crucial for lifespan and preventing premature aging.
  • Molecular mechanisms linking the circadian clock to aging remain largely unknown.

Purpose of the Study:

  • To investigate the molecular mechanisms by which the circadian clock influences aging.
  • To determine the role of BMAL1 in regulating aging pathways.
  • To explore the connection between BMAL1, mTORC1 signaling, and lifespan.

Main Methods:

  • Assessing mTORC1 activity in BMAL1-deficient mice and cell cultures.
  • Utilizing BMAL1 knockout (Bmal1-/-) mouse models.
  • Administering the mTORC1 inhibitor rapamycin to Bmal1-/- mice.

Main Results:

  • BMAL1 deficiency leads to increased mammalian Target of Rapamycin Complex 1 (mTORC1) signaling.
  • Increased mTOR signaling correlates with accelerated aging phenotypes.
  • Rapamycin treatment extended the lifespan of Bmal1-/- mice by 50%.

Conclusions:

  • BMAL1 acts as a negative regulator of mTORC1 signaling.
  • The circadian clock, via BMAL1, modulates mTOR pathway activity.
  • This BMAL1-dependent regulation of mTOR is vital for controlling aging and metabolism.

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