Researchers Uncover How Leukemia Invades Lungs, Proposing New Treatments

Published in Nature Immunology, the research details how AML cells migrate from the bone marrow to the lungs, breaching alveolar walls to settle in connective tissue. Once there, these cells stimulate fibroblasts to produce excess collagen, creating scar-like fibrosis that physically obstructs oxygen exchange. This structural interference also alters the local immune environment, suppressing cancer-fighting lymphocytes while promoting myeloid cells that shield the tumor.

Beyond identifying the damage, the team mapped key molecular drivers, specifically the proteins galectin-9 and the interleukin-33 receptor. By blocking these pathways, researchers successfully halted cancer cell infiltration in experimental models. Clinical analysis further supported these findings: patients treated with prednisone during respiratory distress showed significant functional improvement within 12 hours. Experts now argue that this evidence moves steroid therapy from a reactive judgment call to a necessary clinical guideline for managing early AML complications.