Identification and Characterization of Thymic Epithelial Progenitor Cells

T cell differentiation and repertoire selection depend critically on several distinct thymic epithelial cell types, whose lineage relationships are unclear. We have investigated these relationships via functional analysis of the epithelial populations within the thymic primordium. Here, we show that...

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Bibliographic Details
Published in:Immunity (Cambridge, Mass.) Mass.), 2002-06, Vol.16 (6), p.803-814
Main Authors: Bennett, Andrea R., Farley, Alison, Blair, Natalie F., Gordon, Julie, Sharp, Linda, Blackburn, C.Clare
Format: Article
Language:English
Subjects:
Animals
Antibodies, Monoclonal
Biomarkers
CD4-Positive T-Lymphocytes - cytology
CD8-Positive T-Lymphocytes - cytology
Cell Differentiation
Epithelial Cells - cytology
Female
Flow Cytometry
Genotype & phenotype
Male
Medical research
Mice
Mice, Inbred C57BL
Mice, Inbred CBA
Mice, Nude
Phenotype
Rodents
Stem Cells - cytology
T-Lymphocytes - cytology
Thymus Gland - cytology
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Summary:T cell differentiation and repertoire selection depend critically on several distinct thymic epithelial cell types, whose lineage relationships are unclear. We have investigated these relationships via functional analysis of the epithelial populations within the thymic primordium. Here, we show that mAbs MTS20 and MTS24 identify a population of cells that, when purified and grafted ectopically, can differentiate into all known thymic epithelial cell types, attract lymphoid progenitors, and support CD4 + and CD8 + T cell development in nude mice. In contrast, other epithelial populations in the thymic primordium can fulfill none of these functions. These data establish that the MTS20 +24 + population is sufficient to generate a functional thymus in vivo and thus argue strongly that all thymic epithelial cell types derive from a common progenitor cell.
ISSN:1074-7613
1097-4180
DOI:10.1016/S1074-7613(02)00321-7