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Rapalogs in cancer prevention: anti-aging or anticancer?

Mikhail V Blagosklonny1

  • 1Department of Cell Stress Biology; Roswell Park Cancer Institute; Buffalo, NY, USA. blagosklonny@oncotarget.com

Cancer Biology & Therapy
|November 16, 2012
PubMed

Insights

Calorie restriction and rapamycin slow aging and prevent cancer by targeting the MTOR pathway. Evidence suggests rapamycin

Area of Science:

  • Gerontology and Cancer Research
  • Cellular Aging and Carcinogenesis

Background:

  • Cancer is predominantly an age-related disease, with aging processes influencing carcinogenesis.
  • Calorie restriction (CR) is a well-established intervention that slows aging and reduces cancer incidence.
  • The mechanistic target of rapamycin (MTOR) pathway is implicated in aging and cancer development.

Purpose of the Study:

  • To investigate whether cancer prevention by rapamycin and CR is primarily due to direct anti-cancer effects or indirect aging deceleration.
  • To explore the role of MTOR pathway inhibition in mediating the anti-aging and anti-cancer effects of CR and rapamycin.

Main Methods:

  • Review of existing scientific literature on calorie restriction, rapamycin, MTOR signaling, cellular senescence, aging, and cancer.
  • Analysis of evidence supporting direct versus indirect mechanisms of cancer prevention.

Main Results:

  • Calorie restriction (CR) and rapamycin decelerate aging, partly by inhibiting the MTOR pathway.
  • Rapalogs, including rapamycin, have demonstrated efficacy in suppressing cellular senescence and delaying age-related diseases, including cancer.
  • Emerging evidence indicates that rapamycin's cancer-preventive effects are more likely mediated through the deceleration of the aging process rather than direct targeting of cancer cells.

Conclusions:

  • The anti-aging effects of calorie restriction and rapamycin, mediated via MTOR inhibition, are key to their cancer-preventive properties.
  • Rapamycin's role in cancer treatment may be linked to its ability to slow aging and suppress senescence.
  • Future research should focus on understanding the indirect, aging-related mechanisms of cancer prevention by rapamycin.

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