Preferential activation of CD4+V beta 5.2/5.3+ intestinal intraepithelial lymphocytes in the inflamed lesions of Crohn's disease.
To analyze the nature of intestinal intraepithelial lymphocytes (iIELs) in inflammatory intestinal disease, we established T cell lines of iIELs isolated from endoscopic biopsied ileal and colonic mucosa of Crohn's disease patients. Seven T cell lines from the inflamed terminal ileum of 13 patients, but none of 16 T cell lines from normal terminal ileum, have shown a deviation of T cell receptor variable region gene usage and were enriched in the proportion of CD4+V beta 5.2/5.3+ cells. CD4+V beta 5.2/5.3+ cells in the T cell lines were not increased after stimulation with purified protein derivatives or 65-kDa heat-shock protein but significantly increased after stimulation with staphylococcal enterotoxins C1 and D. Those cells showed increased cytolytic activity against target cells cross-linked by anti-V beta 5.2/5.3 and produced a large amount of interferon-gamma. These results indicated that CD4+V beta 5.2/5.3+ iIELs were preferentially activated in the inflamed lesions of Crohn's disease and may play a possible role in the triggering and progression of human inflammatory intestinal disease.
Watanabe
M
M
Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan.
Hayashi
A
A
Hosoda
Y
Y
Ohara
M
M
Iwao
Y
Y
Ishii
H
H
Ishikawa
H
H
Nanno
M
M
Hibi
T
T
D000293:Adolescent; D000328:Adult; D015496:CD4-Positive T-Lymphocytes / Q000145:classification / Q000276:immunology* / Q000473:pathology*; D002460:Cell Line; D003424:Crohn Disease / Q000276:immunology* / Q000473:pathology*; D004768:Enterotoxins / Q000494:pharmacology; D004848:Epithelium / Q000276:immunology; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000276:immunology* / Q000473:pathology*; D008213:Lymphocyte Activation; D008297:Male; D010835:Phytohemagglutinins / Q000494:pharmacology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology; D013211:Staphylococcus aureus / Q000276:immunology*; D018089:Superantigens / Q000276:immunology
D004768:Enterotoxins; D010835:Phytohemagglutinins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D018089:Superantigens; C026066:enterotoxin A, Staphylococcal