Systemic hematopoietic and tissue microenvironment

The systemic hematopoietic and tissue microenvironment is a specialized physiological niche, primarily located within the bone marrow, that governs the life cycle of blood cells (Nature Reviews Cancer, 2016). It consists of a highly organized architecture of hematopoietic stem cells (HSCs), stromal cells (such as mesenchymal stem cells and osteoblasts), vascular components, and a complex extracellular matrix (Cell Stem Cell, 2017). This environment integrates local signals and systemic factors, such as hormones and cytokines, to regulate hematopoiesis in response to the body's needs (Blood Journal, 2016). Dysregulation of this microenvironment is a hallmark of various hematologic malignancies and inflammatory disorders, where the niche can become corrupted to support the survival and chemoresistance of malignant clones (PubMed, PMID: 27648458). Therapeutic interventions often target specific interactions within this environment, such as the CXCL12-CXCR4 axis, to mobilize stem cells for transplantation or to sensitize cancer cells to treatment (PubChem, Plerixafor). Understanding the interplay between systemic signals and the local tissue niche is crucial for developing regenerative medicines and more effective oncology therapies (NIH, National Cancer Institute).

Other names

Bone marrow microenvironmentHematopoietic stem cell nicheHSC nicheHematopoietic system

Modulation of the hematopoietic niche to influence cell trafficking, proliferation, and differentiation.