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Expression of fas ligand in human hepatoma cell lines: role of hepatitis-B virus X (HBX) in induction of Fas ligand. Paper-1926960. To determine the biological activity of FasL, Hep G2. Paper-1926960.
2. 15 was co-cultured with MOLT-4, T-cell-leukemia cells.
In this study, we investigated FasL expression in 13 human hepatoma cell lines. Paper-1926960.
Hep G2.2.15 induced apoptosis in MOLT-4 and this was inhibited by the antagonistic anti-Fas antibody, ZB4.
Our data suggest that HBx plays a role in the induction of FasL in hepatoma cells and in the escape from immune surveillance. Paper-1926960.
In PLC/PRF/5 cells transfected with the HBV genome or HBx but not in cells transfected with the frameshift mutant of HBx, FasL expression was detected. Paper-1926960.
It has been postulated that tumor cells expressing Fas ligand ( FasL) can evade immune surveillance by inducing apoptosis in T cells expressing Fas. Paper-1926960.
For further analysis of the role of HBx in the induction of FasL, PLC/PRF/5 cells were transfected transiently with the HBV genome, or HBx, or the frameshift mutant of HBx. Paper-1926960.
Strong FasL expression was detected by reverse transcription-polymerase chain reaction or immunofluorescence in Hep G2.2.15, in which the hepatitis-B-virus (HBV) genome was transfected, and in SNU-354, which showed HBx transcripts. Paper-1926960.
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