RRC ID 69592
Author Sato K, Iwasaki S, Yoshino H.
Title Effects and Related Mechanisms of the Senolytic Agent ABT-263 on the Survival of Irradiated A549 and Ca9-22 Cancer Cells.
Journal Int J Mol Sci
Abstract Senolytic agents eliminate senescent cells and are expected to reduce senescent cell-mediated adverse effects in cancer therapy. However, the effects of senolytic agents on the survival of irradiated cancer cells remain unknown. Here, the effects of the senolytic agent ABT-263 on the survival of irradiated A549 and Ca9-22 cancer cells were investigated. ABT-263 was added to the culture medium after irradiation. SA-β-gal activity and cell size, which are hallmarks of cell senescence, were evaluated using a flow cytometer. The colony-forming assay and annexin V staining were performed to test cell survival. We first confirmed that radiation increased the proportion of cells with high SA-β-gal activity and that ABT-263 decreased it. Of note, ABT-263 decreased the survival of irradiated cancer cells and increased the proportion of radiation-induced annexin V+ cells. Furthermore, the caspase inhibitor suppressed the ABT-263-induced decrease in the survival of irradiated cells. Intriguingly, ABT-263 decreased the proportion of SA-β-gal low-activity/large cells in the irradiated A549 cells, which was recovered by the caspase inhibitor. Together, these findings suggest that populations maintaining the ability to proliferate existed among the irradiated cancer cells showing senescence-related features and that ABT-263 eliminated the population, which led to decreased survival of irradiated cancer cells.
Volume 22(24)
Published 2021-12-8
DOI 10.3390/ijms222413233
PII ijms222413233
PMID 34948029
PMC PMC8704639
MeSH A549 Cells Aniline Compounds / pharmacology* Cell Proliferation / drug effects Cell Proliferation / radiation effects Cell Size / drug effects Cell Size / radiation effects Cell Survival / drug effects Cell Survival / radiation effects Gene Expression Regulation, Neoplastic / drug effects Gene Expression Regulation, Neoplastic / radiation effects Humans Neoplasms / drug therapy Neoplasms / metabolism* Neoplasms / radiotherapy Senotherapeutics / pharmacology* Sulfonamides / pharmacology* Ultraviolet Rays / adverse effects beta-Galactosidase / metabolism*
IF 4.556
Human and Animal Cells Ca9-22(RCB1976)