How Tumors Survive Radiation: Plastic Cells and Tolerant Niches Drive

Radiotherapy cures many patients, but relapses after treatment remain common—an outcome a new review in Molecular Cancer says may stem from a flawed framing of “radioresistance.” Led by Yi Zhang, Hongshuai Li, and Xingchen Peng at West China Hospital of Sichuan University, the authors argue radiation doesn’t just leave behind hardier cells. It reshapes surviving tumor cells and their microenvironment into “tolerant niches,” spatial refuges where residual disease can later reactivate. They detail DNA damage responses, then emphasize additional cellular plasticity, including persister-like states, cancer stem cell-like programs (e.g., CD44, aldehyde dehydrogenase), senescence-like survival, and hybrid EMT states.