Research identifies mechanism linking radiation response to tissue regeneration and tumor recurrence

Research from the Weizmann Institute of Science, published in Nature Communications, has identified a biological mechanism known as compensatory proliferation. This process involves cells that, instead of undergoing programmed cell death (apoptosis) following radiation, trigger a regrowth response that reconstructs damaged tissue.

While radiotherapy aims to destroy tumor cells by damaging their DNA through ionizing radiation, this regenerative mechanism may explain why certain tumors return with increased aggression after treatment. The study highlights the unexpected role of caspases—enzymes typically associated with cell destruction—in facilitating rapid tissue regeneration and regrowth in epithelial cells.