This disclosure demonstrates that blockade of TGFβ signaling after a hematopoietic stress (e.g., chemotherapy, transplantation, and infection) accelerates hematopoietic reconstitution and delays the return of cycling hematopoietic stem and progenitor cells (HSPCs) to quiescence. TGFβ blockade in these settings promotes multilineage hematopoietic regeneration by prolonging HSPC cycling and by promoting HSC self-renewal, and is useful for treating hematologic deficiencies caused various hematopoietic stresses.
