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Updated: Feb 21, 2026

SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs
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PARP inhibitors induce a senescence phenotype in non-small cell lung carcinoma cell lines

Camille Huart1, Manon Van den Abbeel1, Christoph Schifflers1

  • 1Biochemistry and Cellular Biology Research Unit (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur (UNamur), Belgium.

FEBS Open Bio
|February 20, 2026
PubMed

Insights

Talazoparib, a PARP1 inhibitor, potently induces senescence in lung cancer cells by activating PARP1. This finding is crucial for developing new senolytic drug combinations to improve cancer treatment efficacy.

Area of Science:

  • Oncology
  • Cell Biology
  • Cancer Therapeutics

Background:

  • Anticancer treatments can trigger DNA damage repair and therapy-induced senescence.
  • Senescent cells have dual roles, potentially promoting or inhibiting tumors.
  • Identifying senescence-inducing treatments is crucial for understanding treatment outcomes.

Purpose of the Study:

  • To identify which anticancer therapies induce senescence.
  • To investigate the role of PARP1 in Talazoparib-induced senescence.
  • To explore the potential of senolytic drugs in combination therapy.

Main Methods:

  • Screening of various PARP1 inhibitors for senescence induction in nonsmall cell lung carcinoma (NSCLC) cell lines.
  • Assessing senescence phenotype in the presence and absence of PARP1.
  • Evaluating the effect of combining Talazoparib with Navitoclax (ABT-263).

Main Results:

  • Talazoparib was identified as the most potent inducer of senescence among tested PARP1 inhibitors in NSCLC cells.
  • PARP1 is essential for Talazoparib-induced senescence.
  • PARP1 is also required for enhanced cell death when Navitoclax is added.

Conclusions:

  • Talazoparib effectively induces senescence in NSCLC cells via PARP1.
  • PARP1 is a key mediator of senescence induction by Talazoparib.
  • Targeting PARP1 and senescence pathways may offer new strategies for combination cancer therapy.
Keywords:
PARP inhibitorslung cancersenescencesenolytics

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