» Articles » PMID: 12807479

Characterization of Extrathymic CD8 Alpha Beta T Cells in the Liver and Intestine in TAP-1 Deficient Mice

Overview
Journal Immunology
Date 2003 Jun 17
PMID 12807479
Citations 3
Authors
Affiliations
Soon will be listed here.
Abstract

TAP-1 deficient (-/-) mice cannot transport MHC class I antigens onto the cell surface, which results in failure of the generation of CD8+ T cells in the thymus. In a series of recent studies, it has been proposed that extrathymic T cells are generated in the liver and at other extrathymic sites (e.g. the intestine). It was therefore investigated whether CD8+ extrathymic T cells require an interaction with MHC class I antigens for their differentiation in TAP-1(-/-) mice. Although CD8+ thymically derived T cells were confirmed to be absent in the spleen as well as in the thymus, CD8 alpha beta+ T cells were abundant in the livers and intestines of TAP-1(-/-) mice. These CD8+ T cells expanded in the liver as a function of age and were mainly confined to a NK1.1-CD3int population which is known to be truly of extrathymic origin. Hepatic lymphocytes, which contained CD8+ T cells and which were isolated from TAP-1(-/-) mice (H-2b), responded to neither mutated MHC class I antigens (bm1) nor allogeneic MHC class I antigens (H-2d) in in vitro mixed lymphocyte cultures. However, the results from repeated in vivo stimulations with alloantigens (H-2d) were interesting. Allogeneic cytotoxicity was induced in liver lymphocytes in TAP-1(-/-) mice, although the magnitude of cytotoxicity was lower than that of liver lymphocytes in immunized B6 mice. All allogeneic cytotoxicity disappeared with the elimination of CD8+ cells in TAP-1(-/-) mice. These results suggest that the generation and function of CD8+ extrathymic T cells are independent of the existence of the MHC class I antigens of the mouse but have a limited allorecognition ability.

Citing Articles

Rapid migration of thymic emigrants to the colonic mucosa in ulcerative colitis patients.

Elgbratt K, Kurlberg G, Hahn-Zohric M, Hornquist E Clin Exp Immunol. 2010; 162(2):325-36.

PMID: 20840654 PMC: 2996600. DOI: 10.1111/j.1365-2249.2010.04230.x.


Systemic CD8 T-cell memory response to a Salmonella pathogenicity island 2 effector is restricted to Salmonella enterica encountered in the gastrointestinal mucosa.

Jones-Carson J, McCollister B, Clambey E, Vazquez-Torres A Infect Immun. 2007; 75(6):2708-16.

PMID: 17403871 PMC: 1932863. DOI: 10.1128/IAI.01905-06.


TAP1-/- mice present oligoclonal BV-BJ expansions following the rejection of grafts bearing self antigens.

Marrero I, Huffman D, Kalil J, Sercarz E, Coelho V Immunology. 2006; 118(4):461-71.

PMID: 16895555 PMC: 1782321. DOI: 10.1111/j.1365-2567.2006.02387.x.

References
1.
Tilloy F, Di Santo J, Bendelac A, Lantz O . Thymic dependence of invariant V alpha 14+ natural killer-T cell development. Eur J Immunol. 1999; 29(10):3313-8. DOI: 10.1002/(SICI)1521-4141(199910)29:10<3313::AID-IMMU3313>3.0.CO;2-8. View

2.
Van Kaer L, Ashton-Rickardt P, Ploegh H, Tonegawa S . TAP1 mutant mice are deficient in antigen presentation, surface class I molecules, and CD4-8+ T cells. Cell. 1992; 71(7):1205-14. DOI: 10.1016/s0092-8674(05)80068-6. View

3.
Bannai M, Oya H, Kawamura T, Naito T, Shimizu T, Kawamura H . Disparate effect of beige mutation on cytotoxic function between natural killer and natural killer T cells. Immunology. 2000; 100(2):165-9. PMC: 2327008. DOI: 10.1046/j.1365-2567.2000.00040.x. View

4.
Weerasinghe A, Sekikawa H, Watanabe H, Mannoor K, Morshed S, Halder R . Association of intermediate T cell receptor cells, mainly their NK1.1(-) subset, with protection from malaria. Cell Immunol. 2001; 207(1):28-35. DOI: 10.1006/cimm.2000.1737. View

5.
Gabriel H, Schmitt B, Kindermann W . Age-related increase of CD45RO+ lymphocytes in physically active adults. Eur J Immunol. 1993; 23(10):2704-6. DOI: 10.1002/eji.1830231049. View