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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cai, Z. Okada, Y. Ohwaki, M. Matsuoka, Y. Ishikawa, H. Umesaki, Y. Matsumoto, S. Nanno, M. Shimamura, T. Kawaguchi, M. |
| Description | Author Affiliation: Kawaguchi M ( Yakult Central Institute for Microbiological Research, Tokyo, Japan.); |
| Abstract | We have compared the cytolytic activities and the cellular compositions of the intestinal intraepithelial lymphocyte (i-IEL) populations in three different combinations of conventional (CV) and germ-free (GF) mice. Cytolytic activity of i-IELs expressing gamma delta T-cell antigen receptors (TCRs) is strain dependent in CV mice (high vs. low), and this strain-dependent variability is unaltered in the GF condition. Although absolute numbers of gamma delta i-IELs are slightly decreased, the composition of CD8 alpha alpha+ and CD4-CD8- subsets and the usage of TCR gamma- and delta-chain variable gene segments by gamma delta i-IELs remain the same in GF mice. By contrast, cytolytic activity of alpha beta TCR-expressing i-IELs is uniformly high in CV mice but attenuated sharply in the GF condition. A conspicuous decrease in the total numbers of alpha beta i-IELs is also noted, and CD8 alpha beta+ and CD4+CD8+ subsets are reduced, whereas the CD8 alpha alpha+ subset is expanded in GF mice. These results indicate that microbial deprivation preferentially influences the alpha beta i-IEL population to decrease and become noncytolytic but has little effect on the pool size or characteristics of gamma delta i-IELs. Consequently, cytolytic activity of freshly isolated i-IELs from GF mice is determined by T cells expressing gamma delta TCRs and is found to be strain dependent. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 18 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cytotoxicity, Immunologic Intestines Immunology Receptors, Antigen, T-Cell, Gamma-delta Biosynthesis T-Lymphocyte Subsets T-Lymphocytes Animals Antibodies, Monoclonal Antigens, CD3 Cells, Cultured Epithelium Fluorescent Antibody Technique Cytology Kinetics Mast-Cell Sarcoma Mice Mice, Inbred BALB C Mice, Inbred C57BL Mice, Inbred Strains Phenotype Receptors, Antigen, T-Cell, Alpha-beta Genetics Tumor Cells, Cultured Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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