Cellular senescence in the cancer microenvironment.

The article focuses on the complex role of cellular senescence—a state of permanent cell cycle arrest—in cancer progression and therapy. It highlights how senescent cells, particularly senescent cancer-associated fibroblasts (CAFs) within the tumor microenvironment, influence cancer development through the secretion of senescence-associated secretory phenotype (SASP) factors that can both suppress and promote tumor growth. The emerging field of senotherapeutics, which includes senolytics that selectively eliminate senescent cells and senomorphics that modulate SASP, shows promise as a novel cancer treatment strategy, with several agents such as ABT-263 undergoing clinical trials. However, the relationship between cellular senescence and cancer is heterogeneous and varies by cancer type, necessitating further research to clarify mechanisms and optimize therapeutic approaches.