Abstract:
:TET proteins oxidize 5-methylcytosine in DNA to 5-hydroxymethylcytosine and other oxidation products. We found that simultaneous deletion of Tet2 and Tet3 in mouse CD4+CD8+ double-positive thymocytes resulted in dysregulated development and proliferation of invariant natural killer T cells (iNKT cells). Tet2-Tet3 double-knockout (DKO) iNKT cells displayed pronounced skewing toward the NKT17 lineage, with increased DNA methylation and impaired expression of genes encoding the key lineage-specifying factors T-bet and ThPOK. Transfer of purified Tet2-Tet3 DKO iNKT cells into immunocompetent recipient mice resulted in an uncontrolled expansion that was dependent on the nonclassical major histocompatibility complex (MHC) protein CD1d, which presents lipid antigens to iNKT cells. Our data indicate that TET proteins regulate iNKT cell fate by ensuring their proper development and maturation and by suppressing aberrant proliferation mediated by the T cell antigen receptor (TCR).
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Tsagaratou A,González-Avalos E,Rautio S,Scott-Browne JP,Togher S,Pastor WA,Rothenberg EV,Chavez L,Lähdesmäki H,Rao Adoi
10.1038/ni.3630subject
Has Abstractpub_date
2017-01-01 00:00:00pages
45-53issue
1eissn
1529-2908issn
1529-2916pii
ni.3630journal_volume
18pub_type
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