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Dynamic regulation of hematopoietic stem cells by bone marrow niches.
Current Stem Cell Reports 2018 September
Purpose of Review: Hematopoietic stem cells (HSC) reside in a specialized microenvironment called the HSC niche. While key components of the niche have been known for several years, recent advances have identified several additional cell types that regulate HSC in the bone marrow (BM). Here we review our current understanding of the components and dynamics of the HSC niche.
Recent Findings: While the niche has been considered a stable structure, recent advances clearly show that the niche is regulated in a dynamic manner to control HSC traffic and function. Moreover the niche can rapidly remodel in response to insults to the BM in a process controlled by positive and negative regulators.
Summary: Multiple niche cells have been shown to be dynamically regulated by systemic and local signals to influence how the niche controls HSC function. Elucidating how different components of the niche coordinate to orchestrate HSC behavior is essential to understand how the hematopoietic system adjusts blood cell production to the demands of the body.
Recent Findings: While the niche has been considered a stable structure, recent advances clearly show that the niche is regulated in a dynamic manner to control HSC traffic and function. Moreover the niche can rapidly remodel in response to insults to the BM in a process controlled by positive and negative regulators.
Summary: Multiple niche cells have been shown to be dynamically regulated by systemic and local signals to influence how the niche controls HSC function. Elucidating how different components of the niche coordinate to orchestrate HSC behavior is essential to understand how the hematopoietic system adjusts blood cell production to the demands of the body.
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