New gut associated lymphoid tissue “cryptopatches” breed murine intestinal intraepithelial T cell precursors

New gut associated lymphoid tissue “cryptopatches” breed murine intestinal intraepithelial T cell precursors
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新的肠道相关淋巴组织“隐斑”培育小鼠肠道上皮内 T 细胞前体

DOI:
10.1007/bf02790407
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发表时间:
1999
影响因子:
4.4
通讯作者:
Y. Kanamori
Y. Kanamori
中科院分区:
医学4区
文献类型:
--
作者:
H. Ishikawa;H. Saito;Kenji Suzuki;Takatoku Oida;Y. Kanamori

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许多携带TCR-α B或TCR-γδ的小鼠上皮内T细胞(IEL)已显示在肠粘膜中的某处发育而不穿过胸腺。然而,这些T细胞在哪里发育还不太清楚,迄今为止仍然是一个悬而未决的问题。为了研究这一问题,我们对小鼠胃肠道进行了免疫组织化学研究,并在小肠和大肠粘膜的隐窝区(除胃外)发现了许多微小的淋巴组织(约1,650个组织/肠),其中聚集了c-kit+ IL-7 R + Thy 1+淋巴造血祖细胞簇(cryptopatches)。从小肠分离的c-kit阳性(c-kit+)但谱系标志物阴性(Lin)的隐补丁细胞在体内转移或组织移植到2Gy照射的严重联合免疫缺陷小鼠中后产生TCR-α B和TCR-γδ IEL。相比之下,从派伊尔集合淋巴结和肠系膜淋巴结分离的细胞,属于相同的肠道免疫区室,但缺乏c-kit+Lin-细胞,未能做到这一点。这些结果与电子显微镜分析的结果相结合,提供了在cryptopatches中发展的局部肠道T细胞前体的直接证据。
Numerous mouse intraepithelial T cells (IEL) bearing either TCR-αΒ or TCR-γδ have been shown to develop somewhere in the intestinal mucosa without passing through the thymus. However, just where these T cells develop has been much less clear and has remained an open question to date. In an effort to investigate this issue, we carried out immunohistochemical study on the murine gastrointestinal tract and identified numerous tiny lymphoid tissues (~1,650 tissues/intestine) in the cryptal region of the small and large intestinal mucosa except for the stomach in which clusters of c-kit+ IL-7R+ Thy1+ lympho-hemopoietic progenitors accumulated (cryptopatches). The cryptopatch cells isolated from the small intestine, which were c-kit positive (c-kit+) but lineage marker negative (Lin), gave rise to TCR-αΒ and TCR-γδ IELs following in vivo transfer or tissue engraftment into 2 Gy-irradiated severe combined immunodeficient mice. In contrast, cells isolated from Peyer’s patches and mesenteric lymph nodes, which belong in the same intestinal immune compartment but lack c-kit+Lin- cells, failed to do so. These results in conjunction with the findings of electron microscopic analysis provide direct evidence of a local intestinal T cell precursor that develops in the cryptopatches.
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发表时间: 1994-12
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影响因子: 32.4
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期刊: Journal of immunology (Baltimore, Md. : 1950)
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DOI: 10.1126/science.7973709
发表时间: 1994-11-18
期刊: SCIENCE
影响因子: 56.9
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