Journal
FRONTIERS IN ONCOLOGY
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fonc.2022.912060
Keywords
megakaryocyte (MK); vascular niche; hematopoietic stem cell (HSC); myeloproliferative neoplasms; hematopoietic microenvironment
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Funding
- National Heart, Lung, and Blood Institute [NIH R01 HL134970, BX003947]
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Megakaryocytes are important components of the hematopoietic niche and play a crucial role in regulating hematopoietic stem cell function. Their interactions with vascular endothelial cells are key players in both normal and neoplastic hematopoiesis.
Megakaryocytes (MKs) are important components of the hematopoietic niche. Compared to the non-hematopoietic niche cells, MKs serving as part of the hematopoietic niche provides a mechanism for feedback regulation of hematopoietic stem cells (HSCs), in which HSC progeny (MKs) can modulate HSC adaptation to hematopoietic demands during both steady-state and stress hematopoiesis. MKs are often located adjacent to marrow sinusoids. Considering that most HSCs reside close to a marrow vascular sinusoid, as do MKs, the interactions between MKs and vascular endothelial cells are positioned to play important roles in modulating HSC function, and by extrapolation, might be dysregulated in various disease states. In this review, we discuss the interactions between MKs and the vascular niche in both normal and neoplastic hematopoiesis.
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