Abstract:
:Although much is known about the migration of T cells from blood to lymph nodes, less is known about the mechanisms regulating the migration of T cells from tissues into lymph nodes through afferent lymphatics. Here we investigated T cell egress from nonlymphoid tissues into afferent lymph in vivo and developed an experimental model to recapitulate this process in vitro. Agonism of sphingosine 1-phosphate receptor 1 inhibited the entry of tissue T cells into afferent lymphatics in homeostatic and inflammatory conditions and caused the arrest, mediated at least partially by interactions of the integrin LFA-1 with its ligand ICAM-1 and of the integrin VLA-4 with its ligand VCAM-1, of polarized T cells at the basal surface of lymphatic but not blood vessel endothelium. Thus, the increased sphingosine 1-phosphate present in inflamed peripheral tissues may induce T cell retention and suppress T cell egress.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Ledgerwood LG,Lal G,Zhang N,Garin A,Esses SJ,Ginhoux F,Merad M,Peche H,Lira SA,Ding Y,Yang Y,He X,Schuchman EH,Allende ML,Ochando JC,Bromberg JSdoi
10.1038/ni1534subject
Has Abstractpub_date
2008-01-01 00:00:00pages
42-53issue
1eissn
1529-2908issn
1529-2916pii
ni1534journal_volume
9pub_type
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