Preham, Olivier Yvon Giuseppe, Pinho, Flaviane Alves, Pinto, Ana Isabel orcid.org/0000-0002-9640-6333 et al. (5 more authors) (2018) CD4+ 1 T cells alter the stromal microenvironment and repress medullary erythropoiesis in murine visceral leishmaniasis. Frontiers in immunology. 2958. ISSN 1664-3224
Abstract
Human visceral leishmaniasis, a parasitic disease of major public health importance in developing countries, is characterized by variable degrees of severity of anemia, but the mechanisms underlying this change in peripheral blood have not been thoroughly explored. Here, we used an experimental model of visceral leishmaniasis in C57BL/6 mice to explore the basis of anemia following infection with Leishmania donovani. 28 days post infection,mice showed bone marrow dyserythropoiesis by myelogram, with a reduction of TER119+ CD71-/+ erythroblasts. Reduction of medullary erythropoiesis coincided with loss of CD169high bone marrow stromal macrophages and a reduction of CXCL12-expressing stromal cells. Although the spleen is a site of extramedullary erythropoiesis and erythrophagocytosis, splenectomy did not impact the extent of anemia or affect the repression of medullary hematopoiesis that was observed in infected mice. In contrast, these changes in bone marrow erythropoiesis were not evident in B6.Rag2 -/- mice, but could be fully reconstituted by adoptive transfer of IFNg-producing but not IFNg-deficient CD4+ T cells, mimicking the expansion of IFNg-producing CD4+ T cells that occurs during infection in wild type mice. Collectively, these data indicate that anemia during experimental murine visceral leishmaniasis can be driven by defects associated with the bone marrow erythropoietic niche, and that this represents a further example of CD4+ T cell-mediated immunopathology affecting hematopoietic competence.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Preham, Alves de Pinho, Pinto, Rani, Brown, Hitchcock, Goto and Kaye. |
Keywords: | bone marrow,erythropoiesis,leishmaniasis,macrophages,stromal cells |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Centre for Immunology and Infection (CII) (York) The University of York > Faculty of Sciences (York) > Biology (York) The University of York > Faculty of Sciences (York) > Hull York Medical School (York) |
Depositing User: | Pure (York) |
Date Deposited: | 03 Dec 2018 10:00 |
Last Modified: | 06 Jan 2025 00:13 |
Published Version: | https://doi.org/10.3389/fimmu.2018.02958 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.3389/fimmu.2018.02958 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:139480 |
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Licence: CC-BY 2.5