Abstract | OBJECTIVES: METHODS: Using PCR Exons 1 through 4 of HLA-B*2705 were fused to Exon 5 of the soluble murine MHC class I variant Q10 and stably transfected into Hela-cells. Transfectants were analyzed using specific PCR, RT-PCR and intracellular and extracellular staining with anti-HLA-B27 monoclonal antibody ME1. Secretion of B27Q10 in the supernatant was examined by isoelectric focusing (IEF). The effect of B27Q10 on T-cells was analyzed using either HLA-B27- or HLA-A2-restricted alloreactive T-cells in a standard 51Cr-release assay. RESULTS: PCR and RT-PCR demonstrated the DNA and mRNA of B27Q10 in the transfectants. By intracellular and extracellular staining with ME1 B27Q10-molecule was detected intracellularly but was not expressed in the cell membrane. Using IEF soluble B27Q10-molecules were found in supernatants of transfectants in a concentration of up to 1.342 microg/ml. Soluble B27QJO-molecule inhibited specifically the cytotoxicity of HLA-B27-restricted alloreactive T-cells by about 30%. CONCLUSION: The secretory non-membrane-expressed molecule B27Q10 inhibits HLA-B27 specific T-cells. The inhibition of cytotoxic T-cells by bacteria induced soluble HLA-B27 may thus enable bacterial persistence.
|
Authors | J G Kuipers, A Bialowons, P Dollmann, M C Jendro, N Wagener, V Rebmann, M Ikeda, F Huang, H Grosse-Wilde, D T Y Yu, H Zeidler, E Märker-Hermann |
Journal | Clinical and experimental rheumatology
(Clin Exp Rheumatol)
2002 Jul-Aug
Vol. 20
Issue 4
Pg. 455-62
ISSN: 0392-856X [Print] Italy |
PMID | 12175099
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- DNA Primers
- HLA-B27 Antigen
- Histocompatibility Antigens Class I
- Q surface antigens
- RNA, Messenger
- Recombinant Fusion Proteins
- DNA
|
Topics |
- Animals
- CD8-Positive T-Lymphocytes
(drug effects, immunology)
- Cloning, Molecular
- DNA
(analysis)
- DNA Primers
(chemistry)
- Dose-Response Relationship, Drug
- Gene Library
- Genetic Engineering
- HLA-B27 Antigen
(genetics, metabolism)
- HeLa Cells
- Histocompatibility Antigens Class I
(genetics, metabolism)
- Humans
- Mice
- RNA, Messenger
(biosynthesis, metabolism)
- Recombinant Fusion Proteins
(pharmacology)
- Reverse Transcriptase Polymerase Chain Reaction
- Transfection
|