Hematopoietic Stem Cell Biology and Microenvironment Dynamics

Hematopoietic stem cells (HSCs) reside within the bone marrow in specialized niches that provide regulatory cues governing self-renewal, quiescence and lineage commitment. These niches comprise a dynamic cellular milieu of mesenchymal stromal cells, endothelial networks, neural elements and immune cells, each contributing extracellular matrix components, cytokines and metabolic signals. HSCs balance intrinsic transcriptional programmes and metabolic states with extrinsic niche factors to maintain blood cell production throughout life. Disruption of niche integrity or shifts in inflammatory tone can drive ageing-associated decline, skewed lineage output or malignant transformation. Advances in single-cell profiling, metabolic manipulation and in vivo imaging have begun to unravel the reciprocal interactions between HSCs and their microenvironment under homeostatic, stress and disease conditions. Insights into these relationships are critical for improving stem cell transplantation, gene therapy and strategies to rejuvenate aged haematopoiesis.

Research from Nature Portfolio

Recent efforts have achieved long-term multilineage engraftment of HSCs differentiated from human induced pluripotent stem cells by refining culture conditions that recapitulate key developmental signals, yielding CD34+ cells with functional potency comparable to cord blood grafts. A comprehensive single-cell transcriptional atlas of human haematopoietic progenitors has revealed previously unrecognised early branchpoints, identifying novel markers that refine the hierarchy of lineage specification and align closely with murine counterparts. Studies manipulating mitochondrial activity have demonstrated a causal link between metabolic state and HSC fate choice: reducing oxidative phosphorylation promotes self-renewal by triggering selective mitophagy, thereby offering a tool to expand functional HSCs ex vivo.

Hematopoietic Stem Cell Biology and Microenvironment Dynamics publication trend

The graph below shows the total number of articles in hematopoietic stem cell biology and microenvironment dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Hematopoietic stem cell (HSC): A multipotent cell capable of self-renewal and generating all blood cell lineages.

Bone marrow niche: The specialised microenvironment of cells and extracellular matrix that regulates HSC behaviour.

Engraftment: The process by which transplanted HSCs home to the bone marrow and establish long-term blood cell production.

Quiescence: A reversible state of cellular dormancy that preserves HSC function and longevity.

Single-cell transcriptomics: A technique for profiling gene expression at the level of individual cells to reveal cellular heterogeneity.

References

1. Long-term engrafting multilineage hematopoietic cells differentiated from human induced pluripotent stem cells. Nature Biotechnology (2024).
2. A comprehensive single cell transcriptional landscape of human hematopoietic progenitors. Nature Communications (2019).
3. Specification of haematopoietic stem cell fate via modulation of mitochondrial activity. Nature Communications (2016).
4. Combined Single-Cell Functional and Gene Expression Analysis Resolves Heterogeneity within Stem Cell Populations. Cell Stem Cell (2015).
5. Inflamm-Aging of Hematopoiesis, Hematopoietic Stem Cells, and the Bone Marrow Microenvironment. Frontiers in Immunology (2016).
6. Inhibition of Endosteal Vascular Niche Remodeling Rescues Hematopoietic Stem Cell Loss in AML. Cell Stem Cell (2017).