Clearing senescent niche cells limits clonal haematopoiesis in mice
Mutant blood cells induced stromal senescence, while depleting senescent non-haematopoietic cells reduced clonal burden and delayed progression to myeloid neoplasia in mice.
Cancer Research
In mouse models and primary human samples, researchers investigated how mutant haematopoietic stem and progenitor cells (HSPCs) interact with the bone marrow microenvironment during clonal haematopoiesis. Mutant haematopoietic cells induced senescence in mesenchymal stromal cells through contact-independent, cytokine-mediated signalling involving TNF-α, IL-6, and STAT3. These senescent mesenchymal stromal cells then preferentially supported mutant HSPCs over wild-type cells. Furthermore, genetic or pharmacological depletion of senescent non-haematopoietic cells reduced clonal haematopoiesis burden in mice. This depletion also delayed progression towards myeloid neoplasia. The study reports that mutant cells actively remodel the premalignant niche to favor their own expansion.
Why it matters
The findings link stromal cell senescence to the expansion of mutant blood lineages, highlighting niche remodelling as a relevant mechanism in age-associated clonal haematopoiesis. Targeting senescent cells in the bone marrow microenvironment may offer a potential strategy for early disease intervention.
Caveats
Therapeutic depletion of senescent non-haematopoietic cells and its effect on disease progression were evaluated only in mouse models. The findings do not yet show whether similar niche clearance approaches would safely alter clonal haematopoiesis in human patients.
- Senolytics
- STAT3
- Cellular senescence
- Clonal hematopoiesis of indeterminate potential
- Myeloid neoplasia
- Mice
The paper
Getting comfortable: clonal haematopoiesis creates a senescent niche for expansion
University of Cambridge Cambridge United Kingdom
Cancer Research · 5 Oct 2026
