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HLA-DQ-controlled T Cell Response to Soluble Egg Antigen of Schistosoma Japonicum in Humans

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Date 1990 Mar 1
PMID 2317945
Citations 2
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Abstract

We analysed regulatory mechanisms of the human T cell response to soluble egg antigen (SEA) of Schistosoma japonicum in vitro. SEA is a crude antigen mixture containing numerous epitopes. We obtained SEA-induced T cell lines from five patients with chronic schistosomiasis japonica, and tested their proliferative response to molecular weight fractions of SEA. Although all T cell lines showed strong responses to crude SEA, there was a heterogeneity in fraction-driven responsiveness. All but one T cell line tested failed to respond to SEA fraction I (mol. wt greater than 18 kD). One patient who was typed as HLA-DQw1/w4, did not show proliferation of CD4+ T cells to fraction I; however, a fraction I-driven helper T cell response was observed when we added HU-11 monoclonal antibody specific for HLA-DQw1/w4. This indicated that the patient had helper T cells to the fraction even though their response was suppressed. Because HLA-DQ had an effect on functional expression of suppressor T cells, it was suggested that there was epitope-specific regulation of the T cell response to SEA, and HLA-DQ-controlled immune suppression might be involved in the regulatory system in human chronic schistosome infection.

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References
1.
CHEEVER A, Byram J, VON LICHTENBERG F . Immunopathology of Schistosoma japonicum infection in athymic mice. Parasite Immunol. 1985; 7(4):387-98. DOI: 10.1111/j.1365-3024.1985.tb00085.x. View

2.
Kasahara M, Takenouchi T, Ikeda H, Ogasawara K, Okuyama T, Ishikawa N . Serologic dissection of HLA-D specificities by the use of monoclonal antibodies. II. Distinction between HLA-Dw2 and HLA-Dw12. Immunogenetics. 1983; 18(5):525-36. DOI: 10.1007/BF00364393. View

3.
Sidner R, CARTER C, Colley D . Modulation of Schistosoma japonicum pulmonary egg granulomas with monoclonal antibodies. Am J Trop Med Hyg. 1987; 36(2):361-70. DOI: 10.4269/ajtmh.1987.36.361. View

4.
Tweardy D, Osman G, El Kholy A, Ellner J . Failure of immunosuppressive mechanisms in human Schistosoma mansoni infection with hepatosplenomegaly. J Clin Microbiol. 1987; 25(5):768-73. PMC: 266086. DOI: 10.1128/jcm.25.5.768-773.1987. View

5.
Hirayama K, Matsushita S, Kikuchi I, Iuchi M, Ohta N, Sasazuki T . HLA-DQ is epistatic to HLA-DR in controlling the immune response to schistosomal antigen in humans. Nature. 1987; 327(6121):426-30. DOI: 10.1038/327426a0. View