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. 1990 Mar;31(2):93–98. doi: 10.1007/BF01742372

Recombinant human interferon γ exerts an anti-proliferative effect and modulates the expression of human leukocyte antigens A,B,C and DR in human urothelial cell lines

S S Ottesen 1,✉, V Ahrenkiel 1, J Kieler 1
PMCID: PMC11038469  PMID: 2108803

Abstract

In this study we have treated three malignant (TGrIII) and two pre-malignant (TGrII) urothelial cell lines with recombinant human interferon γ (rHu-INFγ). The malignant cells (HCV29-T112C1, Hu1703He and T24) were inhibited in growth by more than 50% after treatment with 100–1000 units of rHu-INFγ/ml for 4 days as compared to untreated controls. The growth of the pre-malignant cell lines (HCV29 and Hu609) was not influenced to the same extent in the presence of rHu-INFγ in the culture medium. Treatment with rHu-INFγ increased the expression of monomorphic human leukocyte antigens (HLA) A,B,C as well as β2-microglobulin in all the cell lines tested, as demonstrated using a quantitative immunofluorescence assay. The tumourigenic cell lines increased their expression of HLA in a dose-dependent way, whereas treatment of the non-tumourigenic cells with higher concentrations of rHu-INFγ than 10 units/ml, did not increase the HLA-A,B,C expression further. None of the cell lines expressed HLA-DR unless treated with rHu-INFγ. No correlation between tumourigenicity and the dose of rHu-INFγ required for “de novo” induction of HLA-DR could be demonstrated. After removal of rHu-INFγ from the medium, the expression of HLA-DR gradually decreased in less than 14 days, indicating that the expression of HLA-DR is not constitutive but dependent upon the presence of rHu-INFγ. We conclude that human urothelial cells grown in vitro are sensitive to the anti-proliferative and major-histocompatibility-complex-modulating effects of rHu-INFγ, and that malignant urothelial cells are more sensitive than pre-malignant cells. Finally, our data indicate a possible role for rHu-INFγ in the management of human bladder cancer.

Keywords: Cancer Research, Interferon, Bladder Cancer, Untreated Control, Malignant Cell

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