Abnormal hematopoiesis and hematopoietic stem cell niche

Keiyo Takubo, Takayuki Morikawa, Hiroshi Kobayashi
[Rinshō Ketsueki] the Japanese Journal of Clinical Hematology 2017, 58 (10): 1844-1850
During steady-state conditions, hematopoietic stem cells (HSCs) maintain a quiescent status in the cell cycle. Upon infection or inflammation, bone marrow HSCs begin proliferating and generating differentiated hematopoietic cells via multi-lineage differentiation and self-renewal; this effect is partially due to the alteration of their surrounding microenvironment or niche. In addition, recent studies have revealed that the bone marrow niche critically contributes to abnormal hematopoiesis, including leukemogenesis. In this review, we discuss the recent advances in our understanding of HSC/niche functions and the regulatory machineries employed during homeostasis, stress hematopoiesis, or disease conditions.


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