Gamma-IFN induces a differential expression of HLA-DR, DQ and DP antigens on peripheral blood myeloid leukemic blasts at various stages of differentiation

Leukemia Research
M LecchiP Richiardi

Abstract

Using specific monoclonal antibodies and the indirect immunofluorescence technique, peripheral blood myeloid leukemic blasts from 49 patients were studied for DR expression, 42 for DQ and nine for DP after four days of culture without and with gamma-IFN. The expression of class II molecules on untreated cells depended upon the stage of differentiation and was maximal for DR antigens and lower for DP, while DQ was present only in a small percentage of M2, M4 or M5 blasts. M3 blasts lacked both DR and DQ. Maximal increase of surface expression induced by gamma-IFN was observed for DR molecules independently from the differentiation stage. No significant modification was seen for DQ. Preliminary data concerning DP indicate an increased expression in some of the tested samples. Thus the results obtained on peripheral blood blasts parallel previous observations on leukemic cell lines.

Citations

Apr 14, 2006·Cancer Immunology, Immunotherapy : CII·Elisabeth ErsvaerØystein Bruserud
Jun 1, 1993·European Journal of Immunogenetics : Official Journal of the British Society for Histocompatibility and Immunogenetics·S D'AlfonsoP Momigliano Richiardi
Jun 13, 2017·The Journal of Clinical Investigation·Catherine Matte-MartoneWarren D Shlomchik
Dec 10, 2021·Expert Review of Vaccines·Guilhem RichardAnne S De Groot

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