Related Experiment Video

Updated: Jun 23, 2025

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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PA200-Mediated Proteasomal Protein Degradation and Regulation of Cellular Senescence

Pei Wen1, Yan Sun1, Tian-Xia Jiang2

  • 1State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China.

International Journal of Molecular Sciences
|June 19, 2024
PubMed

Insights

Cellular senescence involves decreased proteasome activity, linked to the protein PA200 (PSME4). This study reviews PA200

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Biochemistry

Background:

  • Cellular senescence is linked to DNA damage, epigenetic changes, and cancer.
  • The proteasome activator PA200 (PSME4) facilitates histone degradation.
  • PA200's role in histone regulation is crucial for transcription, DNA repair, and spermatogenesis.

Purpose of the Study:

  • To summarize research on PA200's association with cellular senescence.
  • To discuss PA200 as a potential therapeutic target for age-related diseases.

Main Methods:

  • Literature review of recent studies on PA200 and senescence.
  • Analysis of PA200's function in histone degradation pathways.

Main Results:

  • PA200 deficiency contributes to reduced proteasome activity during senescence.
  • PA200's function in histone degradation is implicated in senescence.
  • Loss of PA200 or its yeast homolog Blm10 significantly decreases proteasome activity in senescent cells.

Conclusions:

  • PA200 plays a critical role in cellular senescence.
  • PA200 represents a promising therapeutic target for age-related diseases.
Keywords:
Blm10PA200PSME4agingproteasomeprotein degradationsenescence

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