Hematopoietic stem cell lineage specification.

Abstract:

PURPOSE OF REVIEW:Hematopoietic stem cells (HSCs) possess two fundamental characteristics, the capacity for self-renewal and the sustained production of all blood cell lineages. The fine balance between HSC expansion and lineage specification is dynamically regulated by the interplay between external and internal stimuli. This review introduces recent advances in the roles played by the stem cell niche, regulatory transcriptional networks, and metabolic pathways in governing HSC self-renewal, commitment, and lineage differentiation. We will further focus on discoveries made by studying hematopoiesis at single-cell resolution. RECENT FINDINGS:HSCs require the support of an interactive milieu with their physical position within the perivascular niche dynamically regulating HSC behavior. In these microenvironments, transcription factor networks and nutrient-mediated regulation of energy resources, signaling pathways, and epigenetic status govern HSC quiescence and differentiation. Once HSCs begin their lineage specification, single-cell analyses show that they do not become oligopotent but rather, differentiate directly into committed unipotent progenitors. SUMMARY:The diversity of transcriptional networks and metabolic pathways in HSCs and their downstream progeny allows a high level of plasticity in blood differentiation. The intricate interactions between these pathways, within the perivascular niche, broaden the specification of HSCs in pathological and stressed conditions.

journal_name

Curr Opin Hematol

authors

Pouzolles M,Oburoglu L,Taylor N,Zimmermann VS

doi

10.1097/MOH.0000000000000260

subject

Has Abstract

pub_date

2016-07-01 00:00:00

pages

311-7

issue

4

eissn

1065-6251

issn

1531-7048

journal_volume

23

pub_type

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