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Rapalogs and mTOR inhibitors as anti-aging therapeutics

Dudley W Lamming1, Lan Ye, David M Sabatini

  • 1Whitehead Institute for Biomedical Research, Department of Biology, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

The Journal of Clinical Investigation
|March 5, 2013
PubMed

Insights

Rapamycin shows promise for anti-aging in mammals by extending lifespan. However, its unclear mechanisms and side effects necessitate developing safer mTOR-targeting therapies like rapalogs.

Area of Science:

  • Gerontology and aging research
  • Pharmacology and drug discovery
  • Molecular biology and signaling pathways

Background:

  • Rapamycin, an inhibitor of mechanistic target of rapamycin (mTOR), is a leading candidate for anti-aging therapies.
  • It has demonstrated lifespan extension in genetically heterogeneous mice, a robust model for aging studies.
  • Despite its efficacy, the precise mechanisms of action and potential side effects in humans remain significant concerns.

Purpose of the Study:

  • To review the current evidence supporting rapamycin as an anti-aging therapeutic.
  • To discuss the limitations and side effects associated with rapamycin treatment.
  • To explore future directions in developing safer mTOR-targeting anti-aging strategies.

Main Methods:

  • Review of existing scientific literature on rapamycin and mTOR signaling.
  • Analysis of experimental data from mammalian aging studies, particularly in mice.
  • Evaluation of potential therapeutic strategies based on rapamycin analogs (rapalogs) and other mTOR pathway modulators.

Main Results:

  • Rapamycin consistently extends mean and maximum lifespan in long-lived, genetically heterogeneous mice.
  • The underlying molecular mechanisms responsible for rapamycin's life-extending effects are not fully elucidated.
  • Rapamycin is associated with a notable list of side effects, questioning its direct applicability in human anti-aging interventions.

Conclusions:

  • While rapamycin offers strong evidence for anti-aging effects in mammals, its clinical use is limited by safety concerns and unclear mechanisms.
  • Future anti-aging therapies should focus on developing rapalogs or alternative mTOR pathway inhibitors with improved safety profiles.
  • Targeting mTOR signaling remains a promising avenue for interventions aimed at promoting longevity and healthspan.

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