J. Sedlak et al., MODULATION OF CELL-SURFACE EGF RECEPTOR AND HLA EXPRESSION ON GLIOMA CELL-LINES INDUCED WITH CYTOKINES AND DIFFERENTIATION PROMOTORS, Folia biologica, 40(5), 1994, pp. 281-289
Alterations of cell surface expression of HLA (class I, class II DR, D
P and DQ) and EGF-receptor on two malignant glioma cell lines (U-343MG
and U-563MG) induced with cytokines (IFN-gamma, TNF-alpha, IL-1 alpha
) and differentiation promoters (all-trans retinoic acid, phorbol este
r TPA) were analyzed with tire aid of flow cytometry. IFN-gamma induce
d a 10-15fold increase of HLA class I. TNF-alpha alone induced a two-
to fivefold increase of HLA class I cell surface density and increased
the IFN-gamana induced upregulation of HLA class I to approximately 2
0-24 times the antigen density of uninduced cells. TNF-alpha was able
to increase KLA class II DR and DP cell surface expression on glioma l
ines, but it enhanced only the IFN-gamma-induced HLA class II DR upreg
ulation. All-trans retinoic acid and TPA regulated in the opposite way
the EGF-receptor cell surface expression on U-563MG cells.