A groundbreaking study published in Nature Cell Biology reveals that predetermined (predecessor) cells in the bone marrow can accelerate the aging of the surrounding tissue, creating an environment that helps mutated cells proliferate. Researchers focused on clonal hematopoiesis — a condition where individual blood stem cells accumulate mutations and start dominating blood cell production. Previously, it was thought that such cells simply outcompeted healthy ones. However, the new work showed that mutated cells actively alter the bone marrow microenvironment, inducing premature aging in mesenchymal stromal cells. These aged stromal cells stop functioning normally and secrete signaling molecules that disrupt the behavior of neighboring cells. The authors compared this process to a weed altering the soil to outcompete flowers. Experiments in mice demonstrated that removing the aged stromal cells significantly reduced the expansion of mutant clones and slowed the progression of blood disorders. This suggests a new avenue for cancer prevention: instead of targeting only the mutated cells, interventions that reverse the aged microenvironment might be effective. The authors also note that similar mechanisms could operate in other tissues (skin, intestines, esophagus) and other age-related diseases.
About the Author
