How does apoptosis protect the body from cancer cells?

Apoptosis is a vital biological mechanism of programmed cell death that protects the body by identifying and eliminating cells that have become threats to survival, including those that are damaged, mutant, or cancerous.1

When a cell sustains significant genetic damage, the body utilizes surveillance mechanisms—such as the p53 protein—to trigger a series of biochemical reactions that force the cell to self-destruct. This process ensures that cells with compromised DNA do not proliferate and pass on mutations. During apoptosis, the cell is dismantled in an orderly fashion, and its components are packaged into membrane-bound compartments to be safely removed by scavenger cells, preventing the release of harmful materials into surrounding tissues.21

However, cancer cells often survive by suppressing this pathway. They may achieve this by inactivating the p53 gene or by overexpressing anti-apoptotic proteins like BCL-2, which blocks the cell's suicide program. Restoring the body's ability to trigger apoptosis in these abnormal cells remains a primary goal in modern cancer research and therapeutic strategies.13