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Involvement of CCR9...
Involvement of CCR9 at multiple stages of adult T lymphopoiesis.
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- Svensson Frej, Marcus (author)
- Lund University,Lunds universitet,Immunologi,Forskargrupper vid Lunds universitet,Immunology,Lund University Research Groups
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- Marsal, Jan (author)
- Lund University,Lunds universitet,Immunologi,Forskargrupper vid Lunds universitet,Immunology,Lund University Research Groups
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- Uronen-Hansson, Heli (author)
- Lund University,Lunds universitet,Immunologi,Forskargrupper vid Lunds universitet,Immunology,Lund University Research Groups
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- Cheng, Min (author)
- Lund University,Lunds universitet,Stamcellscentrum (SCC),Avdelningen för stamcellsforskning,Institutionen för laboratoriemedicin,Medicinska fakulteten,Stem Cell Center,Division of stem cell research,Department of Laboratory Medicine,Faculty of Medicine
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Jenkinson, William (author)
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- Cilio, Corrado (author)
- Lund University,Lunds universitet,Diabetes - immunovirologi,Forskargrupper vid Lunds universitet,Diabetes - Immunovirology,Lund University Research Groups
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- Jacobsen, Sten Eirik W (author)
- Lund University,Lunds universitet,Stamcellscentrum (SCC),Avdelningen för stamcellsforskning,Institutionen för laboratoriemedicin,Medicinska fakulteten,Stem Cell Center,Division of stem cell research,Department of Laboratory Medicine,Faculty of Medicine
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- Sitnicka Quinn, Ewa (author)
- Lund University,Lunds universitet,Stamcellscentrum (SCC),Avdelningen för stamcellsforskning,Institutionen för laboratoriemedicin,Medicinska fakulteten,Stem Cell Center,Division of stem cell research,Department of Laboratory Medicine,Faculty of Medicine
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Anderson, Graham (author)
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- Agace, William (author)
- Lund University,Lunds universitet,Immunologi,Forskargrupper vid Lunds universitet,Immunology,Lund University Research Groups
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(creator_code:org_t)
- 2007-10-02
- 2008
- English.
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In: Journal of Leukocyte Biology. - : Oxford University Press (OUP). - 1938-3673 .- 0741-5400. ; 83:1, s. 156-164
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http://dx.doi.org/10...
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https://jlb.onlineli...
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https://doi.org/10.1...
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Abstract
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- The chemokine CCL25 is constitutively expressed in the thymus, and its receptor CCR9 is expressed on subsets of developing thymocytes. Nevertheless, the function of CCL25/CCR9 in adult thymopoiesis remains unclear. Here, we demonstrate that purified CCR9–/– hematopoietic stem cells are deficient in their ability to generate all major thymocyte subsets including double-negative 1 (DN1) cells in competitive transfers. CCR9–/– bone marrow contained normal numbers of lineage– Sca-1+c-kit+, common lymphoid progenitors, and lymphoid-primed multipotent progenitors (LMPP), and CCR9–/– LMPP showed similar T cell potential as their wild-type (WT) counterparts when cultured on OP9–{delta}-like 1 stromal cells. In contrast, early thymic progenitor and DN2 thymocyte numbers were reduced in the thymus of adult CCR9–/– mice. In fetal thymic organ cultures (FTOC), CCR9–/– DN1 cells were as efficient as WT DN1 cells in generating double-positive (DP) thymocytes; however, under competitive FTOC, CCR9–/– DP cell numbers were reduced significantly. Similarly, following intrathymic injection into sublethally irradiated recipients, CCR9–/– DN cells were out-competed by WT DN cells in generating DP thymocytes. Finally, in competitive reaggregation thymic organ cultures, CCR9–/– preselection DP thymocytes were disadvantaged significantly in their ability to generate CD4 single-positive (SP) thymocytes, a finding that correlated with a reduced ability to form TCR-MHC-dependent conjugates with thymic epithelial cells. Together, these results highlight a role for CCR9 at several stages of adult thymopoiesis: in hematopoietic progenitor seeding of the thymus, in the DN-DP thymocyte transition, and in the generation of CD4 SP thymocytes.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
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- By the author/editor
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Svensson Frej, M ...
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Marsal, Jan
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Uronen-Hansson, ...
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Cheng, Min
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Jenkinson, Willi ...
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Cilio, Corrado
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Jacobsen, Sten E ...
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Sitnicka Quinn, ...
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Anderson, Graham
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Agace, William
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Cell and Molecul ...
- Articles in the publication
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Journal of Leuko ...
- By the university
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Lund University