1558-Stromal Cell Senescence and Haematopoietic Fitness

This research examines how clonal haematopoiesis (CH), a pre-malignant state where mutated blood stem cells expand, alters the bone marrow microenvironment. Using mouse models and human samples, scientists discovered that mutant cells trigger cellular senescence specifically in mesenchymal stromal cells (MSCs) through the release of inflammatory cytokines like TNF-α and IL-6. This transformation of the surrounding niche is not just a byproduct of the mutations; it actively enhances the survival and fitness of the mutant cells over healthy ones. The study identifies this cellular crosstalk as a key driver in the progression from a non-malignant state to blood cancers. By either genetically or pharmacologically removing these senescent cells, researchers were able to reduce the dominance of the mutated clones. Consequently, targeting the microenvironment and disrupting these signaling pathways offers a promising new strategy for cancer prevention.References:Mistry J J, Young K A, Navarro Figueredo A, et al. Stromal cell senescence augments haematopoietic cell fitness in clonal haematopoiesis[J]. Nature Cell Biology, 2026: 1-15.前往小宇宙评论区与主播互动