02/27/2026
New Research: A Clue to Anemia in SRSF2-Mutant MPN Patients
A study just published in Leukemia may explain why patients with both JAK2 and SRSF2 mutations often have lower red blood cell counts. The SRSF2 mutation causes a cellular pathway to get "stuck in overdrive," blocking the bone marrow from making red blood cells properly.
The promising finding: rapamycin, an already-approved drug, restored normal red blood cell production in lab and patient samples by shutting down that overactive pathway.
Still early-stage research, but a real step toward treating anemia in this patient subset.
Somatic mutations in RNA splicing regulators, including the serine/arginine-rich protein SRSF2, are frequently observed in myeloid malignancies. Using mouse models and primary human samples, we investigated the impact of SRSF2 mutations on erythropoiesis. We found reduced erythropoiesis in Srsf2P95H...