Role of Gut Cryptopatches in Early Extrathymic Maturation of Intestinal Intraepithelial T Cells1
Role of Gut Cryptopatches in Early Extrathymic Maturation of Intestinal Intraepithelial T Cells1
复制标题
肠道隐斑在肠上皮内 T 细胞早期胸腺外成熟中的作用1
作者:
Takatoku Oida;Kenji Suzuki;M. Nanno;Y. Kanamori;H. Saito;E. Kubota;S. Kato;M. Itoh;S. Kaminogawa;H. Ishikawa
Lympho-hemopoietic progenitors residing in murine gut cryptopatches (CP) have been shown to generate intestinal intraepithelial T cells (IEL). To investigate the role of CP in progenitor maturation, we analyzed IEL in male mice with a truncated mutation of common cytokine receptor γ-chain (CRγ−/Y) in which CP were undetectable. IEL-expressing TCR-γδ (γδ-IEL) were absent, and a drastically reduced number of Thy-1highCD4+ and Thy-1highCD8αβ+ αβ-IEL were present in CRγ−/Y mice, whereas these αβ-IEL disappeared from athymic CRγ−/Y littermate mice. Athymic CRγ−/Y mice possessed a small TCR- and αEβ7 integrin-negative IEL population, characterized by the disappearance of the extrathymic CD8αα+ subset, that expressed pre-Tα, RAG-2, and TCR-Cβ but not CD3ε transcripts. These TCR− IEL from athymic CRγ−/Y mice did not undergo Dβ-Jβ and Vδ-Jδ joinings, despite normal rearrangements at the TCR-β and -δ loci in thymocytes from euthymic CRγ−/Y mice. In contrast, athymic severe combined immunodeficient mice in which CP developed normally possessed two major TCR−αEβ7+ CD8αα+ and CD8− IEL populations that expressed pre-Tα, RAG-2, TCR-Cβ, and CD3ε transcripts. These findings underscore the role of gut CP in the early extrathymic maturation of CD8αα+ IEL, including cell-surface expression of αEβ7 integrin, CD3ε gene transcription, and TCR gene rearrangements.
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DOI:
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发表时间:
1990
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Mosley,RL;Styre,D;Klein,JR
通讯作者:
Klein,JR
影响因子:
32.4
作者:
L. Puddington;S. Olson;L. Lefrançois
通讯作者:
L. Puddington;S. Olson;L. Lefrançois
DOI:
--
发表时间:
1997
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
LefrancoisL;Olson,S
通讯作者:
Olson,S
影响因子:
32.4
作者:
Lodolce, JP;Boone, DL;Ma, A
通讯作者:
Ma, A
DOI:
10.1159/000058720
发表时间:
1998
期刊:
Chemical immunology.
影响因子:
--
作者:
Klein,JR
通讯作者:
Klein,JR