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The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
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mTOR Signaling and Cancer Progression03:03

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A radical role for TOR in longevity.

Dudley W Lamming1, David M Sabatini

  • 1Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA.

Cell Metabolism
|June 7, 2011
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Summary
This summary is machine-generated.

Reduced target of rapamycin (TOR) signaling extends yeast life span. This longevity is paradoxically achieved through increased production of reactive oxygen species, challenging previous assumptions.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Aging Research

Background:

  • Target of rapamycin (TOR) signaling is a key regulator of cell growth, metabolism, and aging across diverse organisms.
  • The precise molecular mechanisms by which TOR signaling influences lifespan remain incompletely understood.
  • Previous studies have primarily linked reduced TOR activity to beneficial effects on longevity, often associated with decreased metabolic activity.

Discussion:

  • This study investigates the role of TOR complex 1 (TORC1) activity in yeast lifespan regulation.
  • The findings reveal a counterintuitive mechanism where reduced TORC1 signaling promotes longevity.
  • This longevity is mediated by the generation of reactive oxygen species (ROS), typically considered harmful.

Key Insights:

  • Reduced TORC1 signaling in yeast leads to an extension of lifespan.
  • The pro-longevity effect is dependent on the production of reactive oxygen species (ROS).
  • This suggests a complex, context-dependent role for ROS in aging, where they can be beneficial under specific signaling conditions.

Outlook:

  • Further research is needed to elucidate the precise signaling pathways linking TORC1, ROS production, and lifespan extension.
  • Investigating whether similar paradoxical mechanisms operate in other organisms could provide new insights into aging.
  • Understanding this interplay may reveal novel therapeutic targets for age-related diseases.