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Updated: Jun 23, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

The regulation of INK4/ARF in cancer and aging

William Y Kim1, Norman E Sharpless

  • 1Department of Medicine, The University of North Carolina School of Medicine, Chapel Hill, 27599, USA.

Cell
|October 24, 2006
PubMed

Insights

Loss of the INK4a/ARF/INK4b locus is common in cancer. Its products, p16(INK4a), ARF, and p15(INK4b), are crucial for tumor suppression and influence aging.

Area of Science:

  • Oncology
  • Genetics
  • Aging Research

Background:

  • The INK4a/ARF/INK4b locus on chromosome 9p21 is frequently lost in human cancers.
  • The locus encodes three key tumor suppressors: p15(INK4b), p16(INK4a), and ARF.
  • These proteins have independent and significant roles in preventing tumor development.

Purpose of the Study:

  • To discuss the regulation and functions of p16(INK4a), ARF, and p15(INK4b).
  • To explore their roles in both cancer development and the aging process.

Main Methods:

  • Literature review and synthesis of existing research data.
  • Analysis of genetic alterations and protein expression patterns.

Main Results:

  • Loss of the INK4a/ARF/INK4b locus is a prevalent cytogenetic abnormality in cancer.
  • p16(INK4a) expression is linked to age-dependent reductions in stem cell and progenitor proliferation.
  • The tumor suppressors p15(INK4b), p16(INK4a), and ARF exhibit distinct regulatory mechanisms and functional impacts.

Conclusions:

  • The INK4a/ARF/INK4b locus products are critical for tumor suppression.
  • Dysregulation of this locus contributes to cancer.
  • p16(INK4a) plays a role in aging by affecting cellular proliferation capacity.

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