Abstract:
:The manner in which regulatory T cells (Treg cells) control lymphocyte homeostasis is not fully understood. We identified two Treg cell populations with differing degrees of self-reactivity and distinct regulatory functions. We found that GITR(hi)PD-1(hi)CD25(hi) (Triple(hi)) Treg cells were highly self-reactive and controlled lympho-proliferation in peripheral lymph nodes. GITR(lo)PD-1(lo)CD25(lo) (Triple(lo)) Treg cells were less self-reactive and limited the development of colitis by promoting the conversion of CD4(+) Tconv cells into induced Treg cells (iTreg cells). Although Foxp3-deficient (Scurfy) mice lacked Treg cells, they contained Triple(hi)-like and Triple(lo)-like CD4(+) T cells zsuper> T cells infiltrated the skin, whereas Scurfy Triple(lo)CD4(+) T cells induced colitis and wasting disease. These findings indicate that the affinity of the T cell antigen receptor for self antigen drives the differentiation of Treg cells into distinct subsets with non-overlapping regulatory activities.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Wyss L,Stadinski BD,King CG,Schallenberg S,McCarthy NI,Lee JY,Kretschmer K,Terracciano LM,Anderson G,Surh CD,Huseby ES,Palmer Edoi
10.1038/ni.3522subject
Has Abstractpub_date
2016-09-01 00:00:00pages
1093-101issue
9eissn
1529-2908issn
1529-2916pii
ni.3522journal_volume
17pub_type
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