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

Maria Lecchi, Elisabetta Lovisone, Carlo Genetta, Daniela Peruccio, Luigi Resegotti, Patricia Richiardi

Research output: Contribution to journalArticlepeer-review

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 dependent 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.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalLeukemia Research
Volume13
Issue number3
DOIs
Publication statusPublished - 1989

Keywords

  • Acute myeloid leukemia
  • FAB classification
  • gamma-IFN
  • HLA-class II
  • monoclonal antibodies

ASJC Scopus subject areas

  • Cancer Research
  • Hematology
  • Oncology

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