Longevity & AgingHow Telomere Shortening Drives Clonal Hematopoiesis, Heart Disease, and Cancer
As cells divide over a lifetime, telomeres — the protective caps on chromosome ends — gradually shorten. When they become critically short, cells either stop dividing (senescence) or die. This creates a survival pressure that favors blood stem cells carrying certain mutations, a condition called clonal hematopoiesis. This review explains how that process connects three major age-related threats: cardiovascular disease, cancer, and biological aging itself. In the most dangerous scenarios, mutations in genes like p53 combine with critically short telomeres to reactivate telomerase — the enzyme that rebuilds telomeres — enabling cells to become immortal and malignant. The authors argue that telomere maintenance is a compelling therapeutic target that could address aging, heart disease, and cancer simultaneously.
