Zavazava N, Halene M, Westphal E, Nölle B, Duncker G, Eckstein E, Harpprecht J, Müller-Ruchholtz W. Expression of MHC class I and II molecules by cadaver retinal pigment epithelium cells: optimization of post-mortem HLA typing.
Clin Exp Immunol 1991;
84:163-6. [PMID:
1901778 PMCID:
PMC1535378 DOI:
10.1111/j.1365-2249.1991.tb08141.x]
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Abstract
The objective of this study was to investigate the expression of MHC antigens by retinal pigment epithelium cells (RPE) after stimulation with interferon-gamma (IFN-gamma) and to improve the currently practised technique of cadaver HLA typing. A concentration of 100 U/ml IFN-gamma induced expression of class I molecules up to greater than 90% 3 days after stimulation, whereas 50 U/ml were required for the expression of HLA-DR to greater than 90%. A concentration of 750 U/ml induced 35-45% expression of HLA-DP and less than 25% HLA-DQ after 3 days. Cells were serologically typed using the standard lymphocytotoxicity assay 3 days after stimulation with 250 U/ml IFN-gamma. Typing of class I specificities was complemented by one-dimensional isoelectric focusing (1D-IEF). We observed high concordance between the results of the RPE typing and the lymphocytotoxicity test on the same donors. Our results show complete typing of class I and II antigens post-mortem, which, in particular, enables graft matching and improvement of graft survival in recipients of organs removed many hours after death such as the cornea.
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