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AS160 controls eukaryotic cell cycle and proliferation by regulating the CDK inhibitor p21

Pianchou Gongpan1,2, Yanting Lu1,2, Fang Wang1,2

  • 1a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany , Chinese Academy of Sciences , Kunming , Yunnan , P.R. China.

Cell Cycle (Georgetown, Tex.)
|May 7, 2016
PubMed

Insights

AS160 (TBC1D4) regulates cell proliferation independently of glucose by controlling the cell cycle via p21. This study reveals a key mechanism for AS160 in cell cycle and proliferation.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • AS160 (TBC1D4) is involved in various biological processes.
  • Its precise role in regulating cell proliferation and its mechanism of action are not fully understood.

Purpose of the Study:

  • To elucidate the role and mechanism of AS160 in regulating eukaryotic cell proliferation.
  • To investigate the relationship between AS160, cell cycle, and the cyclin-dependent kinase inhibitor p21.

Main Methods:

  • AS160 knockdown and overexpression in fibroblasts and cancer cells.
  • Cell cycle analysis using flow cytometry.
  • Western blotting to assess p21 and AS160 expression levels.
  • p21 silencing experiments.

Main Results:

  • AS160 depletion inhibited cell proliferation and caused G1 phase cell cycle arrest in a glucose-independent manner.
  • AS160 silencing led to increased p21 expression.
  • AS160 overexpression decreased p21 levels and rescued cell cycle arrest.
  • p21 silencing rescued proliferation and cell cycle progression in AS160-depleted cells.

Conclusions:

  • AS160 regulates glucose-independent cell proliferation through p21-dependent cell cycle control.
  • This study reveals a novel molecular mechanism for AS160 in modulating cell cycle and proliferation with broad physiological relevance.
Keywords:
AS160/TBC1D4G1/Scell cyclecell proliferationp21

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