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Induction and Validation of Cellular Senescence in Primary Human Cells
08:18

Induction and Validation of Cellular Senescence in Primary Human Cells

Published on: June 20, 2018

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PIK3R3 inhibits cell senescence through p53/p21 signaling

Qianzhi Chen1,2, Xuling Sun1, Xuelai Luo1

  • 1Department of GI Cancer Research Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Cell Death & Disease
|September 25, 2020
PubMed

Insights

This study reveals that PIK3R3 protein inhibits cellular senescence in colorectal cancer by affecting the p53/p21 pathway. Inhibiting PIK3R3 may offer a new therapeutic strategy for cancer treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Cellular senescence is a critical process that halts cell cycle progression, eliminating potentially harmful cells.
  • Inducing tumor cell senescence presents a promising strategy for cancer therapy.
  • The role of specific proteins in regulating senescence, particularly in colorectal cancer, requires further elucidation.

Purpose of the Study:

  • To investigate the role of PIK3R3 in regulating cellular senescence in colorectal cancer.
  • To elucidate the molecular mechanism by which PIK3R3 influences the p53/p21 signaling pathway.
  • To assess the potential of targeting PIK3R3 as a therapeutic strategy for colorectal cancer.

Main Methods:

  • Investigated the effect of PIK3R3 on colorectal cancer cell senescence and proliferation.
  • Utilized molecular biology techniques to examine the interaction between PIK3R3 and p53.
  • Analyzed the impact of PIK3R3 on the binding of p53 to the p21 gene promoter.

Main Results:

  • PIK3R3 was found to inhibit cellular senescence in colorectal cancer cells, promoting their proliferation.
  • PIK3R3 directly binds to p53, hindering its association with the p21 gene promoter region.
  • This interaction consequently affects the transcriptional activity of the p21 gene, a key regulator of senescence.

Conclusions:

  • PIK3R3 plays a significant role in regulating p53 activity and inhibiting cellular senescence in colorectal cancer.
  • Targeting PIK3R3 presents a potential novel therapeutic approach for colorectal cancer treatment.
  • Further research into PIK3R3 inhibition could lead to effective anti-cancer therapies.

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