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Rapamycin slows aging in mice

John E Wilkinson1, Lisa Burmeister, Susan V Brooks

  • 1Unit for Laboratory Animal Medicine and Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA.

Aging Cell
|May 17, 2012
PubMed

Insights

Rapamycin extends lifespan in mice by slowing multiple aging aspects, not just preventing cancer. However, it also causes harmful side effects like testicular degeneration and cataracts.

Area of Science:

  • Gerontology and pharmacology
  • Molecular biology and aging research

Background:

  • Rapamycin is known to increase lifespan in mice.
  • Its precise mechanism, whether solely through anti-cancer effects or broader anti-aging properties, remains under investigation.

Purpose of the Study:

  • To investigate if rapamycin slows multiple aging processes in mice beyond its effects on neoplastic diseases.
  • To identify potential adverse effects of rapamycin treatment on aging-related changes.

Main Methods:

  • Treatment of mice with rapamycin starting at 9 months of age.
  • Assessment of age-dependent changes in various tissues (heart, liver, adrenal glands, endometrium, tendon) and spontaneous activity.
  • Evaluation of the incidence of neoplastic diseases, testicular degeneration, and cataracts.

Main Results:

  • Rapamycin treatment significantly slowed age-dependent changes in multiple organs and spontaneous activity.
  • These effects suggest rapamycin retards multiple aspects of aging in mice.
  • However, rapamycin treatment also led to a higher incidence of testicular degeneration and cataracts.

Conclusions:

  • Rapamycin demonstrates broad anti-aging effects in mice, impacting various physiological systems.
  • The drug's potential therapeutic benefits must be weighed against adverse effects.
  • Further research is needed to optimize rapamycin's timing, dosage, and tissue-specific actions for clinical application, particularly concerning inhibitors of TOR (target of rapamycin) action.

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