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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
CD150 high Bone Marrow Tregs Maintain Hematopoietic Stem Cell Quiescence and Immune Privilege via Adenosine
Cell Stem Cell, Volume 22, No. 3, Year 2018
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Description
A crucial player in immune regulation, FoxP3 + regulatory T cells (Tregs) are drawing attention for their heterogeneity and noncanonical functions. Here, we describe a Treg subpopulation that controls hematopoietic stem cell (HSC) quiescence and engraftment. These Tregs highly expressed an HSC marker, CD150, and localized within the HSC niche in the bone marrow (BM). Specific reduction of BM Tregs achieved by conditional deletion of CXCR4 in Tregs increased HSC numbers in the BM. Adenosine generated via the CD39 cell surface ectoenzyme on niche Tregs protected HSCs from oxidative stress and maintained HSC quiescence. In transplantation settings, niche Tregs prevented allogeneic (allo-) HSC rejection through adenosine and facilitated allo-HSC engraftment. Furthermore, transfer of niche Tregs promoted allo-HSC engraftment to a much greater extent than transfer of other Tregs. These results identify a unique niche-associated Treg subset and adenosine as regulators of HSC quiescence, abundance, and engraftment, further highlighting their therapeutic utility. Hirata et al. identify a regulatory T cell (Treg) population that localizes in the hematopoietic stem cell (HSC) niche with high-level expression of CD150, an HSC marker. These niche-associated Tregs maintain HSC quiescence and immune privilege through adenosine. Furthermore, transfer of niche Tregs significantly improves allogeneic HSC engraftment. © 2018 Elsevier Inc.
Authors & Co-Authors
Robson, Simon Christopher
United States, Boston
Beth Israel Deaconess Medical Center
Frenette, Paul Sylvain
United States, New York
Albert Einstein College of Medicine of Yeshiva University
Statistics
Citations: 156
Authors: 2
Affiliations: 4
Identifiers
Doi:
10.1016/j.stem.2018.01.017
ISSN:
19345909
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study