Hematopoietic stem cell microenvironment

The **hematopoietic stem cell microenvironment** refers to a complex and highly organized network of supportive cells, extracellular matrix components, and soluble factors within the bone marrow that regulate hematopoietic stem cell (HSC) fate and function[1][3][8]. This microenvironment, also known as the HSC niche, is composed of stromal cells (such as fibroblasts, macrophages, endothelial cells, adipocytes), accessory immune cells, structural extracellular matrix, and cytokines[2][7]. The interaction between these elements and HSCs governs processes including self-renewal, proliferation, differentiation, homing, and apoptosis of stem cells[6][8]. Dysregulation and disruption of the microenvironment are implicated in the development of hematological malignancies, bone marrow failure syndromes, and complications following hematopoietic stem cell transplantation[3][7][8]. Single-cell and imaging studies continue to expand understanding of its role in health and disease[8].

Other names

Hematopoietic microenvironmenthematopoietic stem cell nichebone marrow niche