Abstract:
:For a brief period during fetal lymph node organogenesis in mice, lymph node postcapillary high endothelial venules surprisingly express the Peyer's patch addressin MAdCAM-1. This expression allows initial seeding of this incipient structure by two unusual lymphocyte populations selectively expressing the Peyer's patch homing receptor integrin alpha4beta7: CD4+CD3- oligolineage progenitors and TCR gammadelta+ T cells. We show here that CD4+CD3- cells are lineage-restricted progenitors that express surface lymphotoxin-beta (LTbeta) and the chemokine receptor BLR1 and that can become natural killer cells, dendritic antigen-presenting cells, and follicular cells of unknown outcome, but these cells do not become T or B lymphocytes. Since the necessity of lymphotoxin in lymphoid organ development has been shown, we propose that the novel subset of CD4+CD3-LTbeta+ fetal cells is instrumental in the development of lymphoid tissue architecture.
journal_name
Immunityjournal_title
Immunityauthors
Mebius RE,Rennert P,Weissman ILdoi
10.1016/s1074-7613(00)80371-4subject
Has Abstractpub_date
1997-10-01 00:00:00pages
493-504issue
4eissn
1074-7613issn
1097-4180pii
S1074-7613(00)80371-4journal_volume
7pub_type
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