LONG-TERM THYMIC RECONSTITUTION BY PERIPHERAL CD4 AND CD8 SINGLE-POSITIVE LYMPHOCYTES

被引:15
作者
HILBERT, DM
HOLMES, KL
ANDERSON, AO
RUDIKOFF, S
机构
[1] NIAID,BIOL RESOURCES BRANCH,FLOW CYTOMETRY SECT,BETHESDA,MD 20892
[2] USA,MED RES INST INFECT DIS,DEPT RESP & MUCOSAL IMMUNOL,FREDERICK,MD 21701
关键词
THYMIC IMMIGRATION; IN-VIVO LYMPHOCYTES HOMING; PEYER PATCHES; FLOW CYTOMETRY;
D O I
10.1002/eji.1830231006
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Significant immigration of peripheral T cells into SCID thymus was observed following reconstitution with normal Peyer's patch, mesenteric lymph node or peripheral lymph node cells. Immunohistologic and flow cytometric analyses reveal that T cells from these tissues are found in the thymus for as long as 177 days and can account for up to 67% of intrathymic cells. The returning cells express the CD3/T cell receptor alpha/beta complex, indicative of mature cells, and are equally divided among helper (CD4+CD8-) and cytotoxic (CD4-/CD8+) phenotypes. The immigration of peripheral T cells is not accompanied by the appearance of immature, double-positive (CD4+CD8+) thymocytes as seen in similar reconstitutions using bone marrow. Taken together, these results suggest that peripheral T cells from a variety of lymphoid organs may regularly re-enter the thymus and, thus, possibly play a role in normal thymic development.
引用
收藏
页码:2412 / 2418
页数:7
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