Low-molecular-weight protein ligands from Onchocerca volvulus preferentially stimulate the human gammadelta T cell Vdelta1+ subset.
Onchocerciasis is a chronic infectious disease caused by the filarial nematode Onchocerca volvulus. A minor population of human gammadelta T cells expressing Vdelta1 chains is preferentially stimulated by O. volvulus ligands in vitro. Therefore, the nature of the parasite ligand and the effector functions of Vdelta1+ T cells stimulated by O. volvulus was investigated. A 5- to 30-kDa ligand from the adult parasite lysate that is sensitive to proteinase treatment was identified. Presentation for preferential stimulation of Vdelta1+ T cells required processing. After in vitro stimulation with O. volvulus in the presence of interleukin-2, Vdelta1+ T cells produced interferon-gamma but not interleukin-4 and exhibited NK cytolytic activities. It is concluded that somatic 5- to 30-kDa protein ligands from O. volvulus stimulate Vdelta1+ T cells and that Vdelta1+ T cells play a role in immunity to O. volvulus.
Munk
M E
ME
Department of Immunology, University of Ulm, Germany. munk@mpiib-berlin.mpg.de
Schoel
B
B
Anding
P
P
Brattig
N W
NW
Kaufmann
S H
SH
D000818:Animals; D017252:CD3 Complex / Q000276:immunology; D002457:Cell Extracts / Q000276:immunology; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D019084:Fluorescent Antibody Technique, Indirect; D015801:Helminth Proteins / Q000276:immunology*; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D007694:Killer Cells, Natural / Q000276:immunology; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008024:Ligands; D008213:Lymphocyte Activation; D017181:Onchocerca volvulus / Q000276:immunology*; D009855:Onchocerciasis / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000276:immunology*; D016176:T-Lymphocyte Subsets / Q000276:immunology*
D017252:CD3 Complex; D002457:Cell Extracts; D015801:Helminth Proteins; D008024:Ligands; D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta; D015847:Interleukin-4; D007371:Interferon-gamma