A dynamic niche provides Kit ligand in a stage-specific manner to the earliest thymocyte progenitors
Open accessAbstract
Thymic T cell development is initiated from bone-marrow-derived multi potent thymus-seeding progenitors. During the early stages of thymocyte differentiation, progenitors become T cell restricted. However, the cellular environments supporting these critical initial stages of T cell development within the thymic cortex are not known. Here we use the dependence of early, c-Kit-expressing thymic progenitors on Kit ligand (KitL) to show that CD4(-)CD8(-)c-Kit(+)CD25(-) DN1-stage progenitors associate with, and depend on, the membrane-bound form of KitL (mKitL) provided by a cortex-specific KitL-expressing vascular endothelial cell (VEC) population. In contrast, the subsequent CD4(-)CD8(-)c-Kit(+)CD25(+) DN2-stage progenitors associate selectively with cortical thymic epithelial cells (cTECs) and depend on cTEC-presented mKitL. These results show that the dynamic process of early thymic progenitor differentiation is paralleled by migration-dependent change to the supporting niche, and identify VECs as a thymic niche cell, with mKitL as a critical ligand.
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In postnatal mice, the entry point is thought to be formed by specialized endothelial cells at the cortical/medullary border of the thymus.
“In postnatal mice, the entry point is thought to be formed by specialized endothelial cells at the cortical/medullary border of the thymus (129).”
From Mechanisms of Action of Hematopoietic Transcription Factor PU.1 in Initiation of T-Cell Development (2019) · cites this paper as [129]
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Cites
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Mechanisms of Action of Hematopoietic Transcription Factor PU.1 in Initiation of T-Cell Development
Rothenberg, E. V., Hosokawa, H., & Ungerbäck, J. (2019) · Frontiers in Immunology · doi:10.3389/fimmu.2019.00228 · Cited by 99 · see citing works
“In postnatal mice, the entry point is thought to be formed by specialized endothelial cells at the cortical/medullary border of the thymus (129).”
Background
- Authors
- Buono, M., Facchini, R., Matsuoka, S., Thongjuea, S., Waithe, D., Luis, T. C., Giustacchini, A., Besmer, P., Mead, A. J., Jacobsen, S. E. W., & Nerlov, C.
- Affiliations
- University of Oxford (GB)
- Memorial Sloan Kettering Cancer Center (US)
- Corresponding author
- Jacobsen, Sten Eirik W.
- Nerlov, Claus
- ORCID
- Venue
- Nature Cell Biology
- Published
- 2016-01-18
- Volume
- 18
- Issue
- 2
- Pages
- 157-167
- ISSN
- 1465-7392 (ISSN-L)
- 1476-4679
- PMC
- PMC4972409
- OpenAlex
- W2272711685
- Cited by
- 79
- References
- 1
- Citations by year
- 2026: 2 · 2025: 8 · 2024: 11 · 2023: 10 · 2022: 9 · 2021: 6 · 2020: 8 · 2019: 5 · 2018: 8 · 2017: 7 · 2016: 5
- FWCI
- 5.05
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature Cell Biology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Cancer Research UK (A11814)
- Medical Research Council (MR/K01577X/1, MR/M00919X/1, MR/L006340/1)
- National Heart, Lung, and Blood Institute (R01HL055748)
- National Cancer Institute (R01CA102774, P30CA008748)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD038908)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
- Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Keywords
- T cell development, thymic niche, stem cell factor, CD117, vascular endothelial cells, cortical thymic epithelial cells, thymic cortex, T cell differentiation
- MeSH terms
- Animals, Cell Differentiation, Cell Movement, Cells, Cultured, Mice, Transgenic, Phenotype, Signal Transduction, Gene Expression Regulation, Developmental, Coculture Techniques, Cell Lineage, Stem Cell Factor, Paracrine Communication, Multipotent Stem Cells, Endothelial Cells, Stem Cell Niche, Thymocytes
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