Schistosoma japonicum egg antigen-specific T cell lines in man. Induction of helper and suppressor T cell lines and clones in vitro in a patient with chronic schistosomiasis japonica.
T cell lines (TCLs) specific for Schistosoma japonicum egg antigen were established from a patient with chronic schistosomiasis japonica to investigate the regulatory mechanism of S.japonicum egg antigen-driven T cell responses in man. All five TCLs tested were CD2+, CD4+, CD8-, and were strongly proliferative only to S. japonicum egg antigen in the absence of exogenous IL-2. All but one TCL produced IL-2-like lymphokines in vitro, indicating their helper T cell functions. One TCL, SjE-3, failed to produce IL-2-like lymphokines. Moreover, this TCL suppressed the specific proliferation of autologous peripheral blood lymphocytes to S. japonicum egg antigen. This TCL produced a soluble suppressor factor(s). These functional diversities among established TCLs were also confirmed by cloned T cells. Our observations might suggest that the regulatory system through helper and suppressor T-T interactions somehow involved in T cell responses to the egg antigen in human chronic schistosomiasis japonica.
D000818:Animals; D000947:Antigens, Helminth / Q000276:immunology*; D002460:Cell Line; D002908:Chronic Disease; D002999:Clone Cells / Q000276:immunology; D004527:Egg Proteins / Q000276:immunology; D000939:Epitopes / Q000276:immunology; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis; D008213:Lymphocyte Activation; D008875:Middle Aged; D010641:Phenotype; D012549:Schistosoma japonicum / Q000276:immunology*; D012554:Schistosomiasis japonica / Q000276:immunology*; D013491:Suppressor Factors, Immunologic / Q000096:biosynthesis; D006377:T-Lymphocytes, Helper-Inducer / Q000145:classification / Q000276:immunology* / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000145:classification / Q000276:immunology* / Q000378:metabolism
D000947:Antigens, Helminth; D004527:Egg Proteins; D000939:Epitopes; D007376:Interleukin-2; D013491:Suppressor Factors, Immunologic