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- Document 0526
- DOCN M9620526
- TI CD8highCD57+ T lymphocytes in normal, healthy individuals are
- oligoclonal and respond to human cytomegalovirus.
- DT 9602
- AU Wang EC; Moss PA; Frodsham P; Lehner PJ; Bell JI; Borysiewicz LK;
- Department of Medicine, University of Wales College of Medicine,; Health
- Hospital, Cardiff, United Kingdom.
- SO J Immunol. 1995 Nov 15;155(10):5046-56. Unique Identifier : AIDSLINE
- GENBANK/Z50839
- AB CD8+CD57+ lymphocytes from normal peripheral blood are divided into T
- cells expressing high levels of CD8 and NK cells expressing low levels
- of surface CD8. Increased numbers of CD8highCD57+ T cells correlate with
- previous exposure to human cytomegalovirus (HCMV) infection, but no
- virus-specific function or function for CD8highCD57+ cells has been
- recorded. We have studied the TCR repertoire and responses of the
- CD8highCD57+ population induced by virus-infected fibroblasts in healthy
- individuals. Using three-color flow cytometry of PBL, we detected
- restricted TCRBV usage in the CD8highCD57+ subset of 11/15 subjects,
- compared with 1/15 in the CD8+, CD57- subset. The results of anchored
- PCR and sequencing also showed oligoclonality of TCR; 40-70% of
- CD8highCD57+ lymphocytes (10-20% of total CD8+ T cells) were derived
- from single clones. Such expansions were stable with time and detected
- in one subject over a 2-yr period. Functionally, CD8highCD57+
- lymphocytes proliferated strongly to HCMV-, but not HSV-, VZV-, or
- influenza-infected fibroblasts in an MHC-unrestricted manner in vitro,
- including preferential augmentation of particular in vivo oligoclonally
- expanded subpopulations. HCMV-specific MHC-restricted CTL were detected,
- but limiting dilution analysis showed that these were a minority (< 10%)
- and not the oligoclonal subsets. In contrast, depletion of oligoclonally
- expanded CD8highCD57+ subpopulations, resulted in the increase of
- HCMV-specific CTL, suggesting functional heterogeneity in these cells.
- DE Adult Amino Acid Sequence Antigens, CD57/*IMMUNOLOGY Base Sequence
- Cells, Cultured Clone Cells Cytomegalovirus/*IMMUNOLOGY
- Cytomegalovirus Infections/*IMMUNOLOGY CD8-Positive
- T-Lymphocytes/CYTOLOGY/*IMMUNOLOGY/*VIROLOGY Human Middle Age
- Molecular Sequence Data Receptors, Antigen, T-Cell/GENETICS/*IMMUNOLOGY
- Support, Non-U.S. Gov't JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-