Related Experiment Video

Updated: Jul 14, 2026

Simultaneous Imaging and Flow-Cytometry-based Detection of Multiple Fluorescent Senescence Markers in Therapy-Induced Senescent Cancer Cells
08:56

Simultaneous Imaging and Flow-Cytometry-based Detection of Multiple Fluorescent Senescence Markers in Therapy-Induced Senescent Cancer Cells

Published on: July 12, 2022

IRF1 Inhibits Therapy-Induced Senescence of Glioblastoma Cells Through OAS2

Genli Ma1, Weiwei Huang1, Hangcong Yan1

  • 1School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, China.

Cells
|July 13, 2026
PubMed

Insights

Interferon regulatory factor-1 (IRF1) inhibits glioblastoma (GBM) cell senescence induced by temozolomide (TMZ) by upregulating OAS2. This discovery offers new therapeutic targets for improving GBM treatment outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Glioblastoma (GBM) is an aggressive brain tumor with poor prognosis and high recurrence rates.
  • Therapy-induced senescence (TIS) in GBM cells drives tumor progression and relapse.
  • The molecular mechanisms of temozolomide (TMZ)-induced senescence in GBM are not fully understood.

Purpose of the Study:

  • To investigate the role of interferon regulatory factor-1 (IRF1) in TMZ-induced senescence of GBM cells.
  • To elucidate the molecular pathway through which IRF1 influences GBM senescence.
  • To identify potential therapeutic targets for enhancing GBM treatment efficacy.

Main Methods:

  • Analyzing IRF1 and OAS2 expression in TMZ-induced senescent GBM cells.
  • Performing gene knockdown and overexpression experiments for IRF1 and OAS2.
  • Assessing senescence markers such as SA-β-gal activity and Lamin B1 expression.
  • Evaluating cell division and senescence-associated secretory phenotype (SASP).

Main Results:

  • IRF1 was found to be downregulated in TMZ-induced senescent GBM cells.
  • IRF1 knockdown promoted GBM cell senescence, while IRF1 overexpression partially reversed it.
  • IRF1 regulates the expression of 2',5'-oligoadenylate synthetase 2 (OAS2).
  • OAS2 was also downregulated in senescent GBM cells, and its knockdown induced senescence.

Conclusions:

  • IRF1 acts as an inhibitor of TMZ-induced GBM cell senescence.
  • The IRF1-OAS2 axis is a novel regulatory pathway involved in GBM senescence.
  • Targeting the IRF1-OAS2 pathway may offer a new therapeutic strategy for GBM treatment.
Keywords:
IRF1OAS2glioblastomasenescence

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