DR3 regulates negative selection during thymocyte development.
DR3 (Ws1, Apo3, LARD, TRAMP, TNFSFR12) is a member of the death domain-containing tumor necrosis factor receptor (TNFR) superfamily, members of which mediate a variety of developmental events including the regulation of cell proliferation, differentiation, and apoptosis. We have investigated the in vivo role(s) of DR3 by generating mice congenitally deficient in the expression of the DR3 gene. We show that negative selection and anti-CD3-induced apoptosis are significantly impaired in DR3-null mice. In contrast, both superantigen-induced negative selection and positive selection are normal. The pre-T-cell receptor-mediated checkpoint, which is dependent on TNFR signaling, is also unaffected in DR3-deficient mice. These data reveal a nonredundant in vivo role for this TNF receptor family member in the removal of self-reactive T cells in the thymus.
Wang
E C
EC
Imperial Cancer Research Fund, Lincoln's Inn Fields, London WC2A 3PX, United Kingdom.
Thern
A
A
Denzel
A
A
Kitson
J
J
Farrow
S N
SN
Owen
M J
MJ
D000818:Animals; D017209:Apoptosis / Q000235:genetics / Q000276:immunology; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology; D005786:Gene Expression Regulation / Q000276:immunology; D006801:Humans; D051379:Mice; D018345:Mice, Knockout; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics / Q000276:immunology*; D053219:Receptors, Tumor Necrosis Factor, Member 25; D011995:Recombination, Genetic; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*
D018124:Receptors, Tumor Necrosis Factor; D053219:Receptors, Tumor Necrosis Factor, Member 25; C506033:TNFRSF25 protein, human; C506034:Tnfrsf25 protein, mouse