Regulation of antigen-induced blastogenesis and interleukin-2 expression by adherent mononuclear cells in humans infected with Schistosoma mansoni.
The immune response and its regulation by adherent mononuclear cells were investigated in 39 Egyptians aged 13-30 (mean +/- SD, 16.2 +/- 3.6) with chronic Schistosoma mansoni infection (fecal egg excretion, 40-2480 eggs/g; mean, 709 +/- 612). Blastogenesis and production of interleukin-2 (IL-2) by peripheral blood mononuclear cells showed a significant correlation when streptolysin O but not when soluble worm antigenic preparation (SWAP) was used as stimulus. This suggested independent regulation of these responses to SWAP. Thirteen subjects showed SWAP-restricted suppression of blastogenesis but not IL-2 production by adherent cells. Compared with 24 other S. mansoni-infected subjects, they had depressed blastogenic responses to SWAP but comparable SWAP-induced IL-2 production and responsiveness to exogenous IL-2. This study indicates that IL-2 production is not the site of action of parasite antigen-restricted suppressor adherent cells in chronic S. mansoni infection.
Ellner
J J
JJ
Department of Medicine, Case Western Reserve University, Cleveland, Ohio.
Wilson
C
C
Toossi
Z
Z
el Kholy
A
A
D000293:Adolescent; D000328:Adult; D000818:Animals; D000947:Antigens, Helminth / Q000276:immunology; D001426:Bacterial Proteins; D002448:Cell Adhesion; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D007376:Interleukin-2 / Q000096:biosynthesis*; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D012044:Regression Analysis; D012550:Schistosoma mansoni / Q000276:immunology; D012555:Schistosomiasis mansoni / Q000276:immunology*; D013301:Streptolysins / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
D000947:Antigens, Helminth; D001426:Bacterial Proteins; D007376:Interleukin-2; D013301:Streptolysins; C025964:streptolysin O