ArticleJournal of clinical laboratory analysis2026
The Immunoregulatory and Hematopoietic Effects of Momelotinib in a Murine Bone Marrow Failure Model.
Article in Journal of clinical laboratory analysis, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundImmune-mediated bone marrow failure (AA) is characterized by T cell-mediated destruction of hematopoietic stem and progenitor cells (HSPCs). The JAK-STAT signaling pathway plays a crucial role in regulating immune responses, and JAK inhibitors have shown potential in treating immune-mediated disorders. This study investigates the effects of MMB, a JAK inhibitor, in a mouse model of immune-mediated bone marrow failure to evaluate its impact on hematopoiesis and immune cell function.
methodsIn this study, immune-mediated AA was induced in B6D2F1 female mice through irradiation and lymphocyte infusion. The mice were treated with MMB monotherapy at doses of 6.25 and 12.5 mg/kg for 14 days. Peripheral blood cell counts, bone marrow cell counts, plasma cytokine levels, T lymphocyte subsets, Fas/FasL expression, and hematopoietic stem and progenitor cell (HSPC) levels were analyzed to assess the effects of MMB treatment on immune function and hematopoiesis.
resultsMMB treatment exacerbated the reduction in peripheral blood cell counts in marrow failure mice and decreased bone marrow hematopoietic cell numbers. Concurrently, MMB also reduced cytokine levels. The treatment also led to a significant reduction in CD4
conclusionMMB treatment exacerbated peripheral blood cell reduction and impaired bone marrow hematopoiesis in the immune-mediated AA mouse model. Although MMB modulated T lymphocyte subsets, it did not significantly improve hematopoietic stem and progenitor cell function. These findings highlight the need for further research to explore the potential and limitations of JAK inhibitors like MMB in the treatment of immune-mediated bone marrow failure.
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