Journal
FRONTIERS IN IMMUNOLOGY
Volume 7, Issue -, Pages 1-14Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2016.00184
Keywords
T cells; bone remodeling; hematopoiesis; B cells; osteoclast; osteoblast
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Funding
- Fundacao Carlos Chagas Litho de Amparo a Pesquisa do Estado do Rio de Janeiro [E_26/204.481/2014, E_26/112.898/2012]
- Conselho National de Desenvolvimento Cientifico e Tecnologico [483385/2013-1, 309755/2014-0]
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The majority of T cells present in the bone marrow (BM) represent an activated/memory phenotype and most of these, if not all, are circulating T cells. Their lodging in the BM keeps them activated, turning the BM microenvironment into a memory reservoir. This article will focus on how T cell activation in the BM results in both direct and indirect effects on the hematopoiesis. The hematopoietic stem cell niche will be presented, with its main components and organization, along with the role played by T lymphocytes in basal and pathologic conditions and their effect on the bone remodeling process. Also discussed herein will be how normal bone mass peak is achieved only in the presence of an intact adaptive immune system, with T and B cells playing critical roles in this process. Our main hypothesis is that the partnership between T cells and cells of the BM microenvironment orchestrates numerous processes regulating immunity, hematopoiesis, and bone remodeling.
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