Resistance of SKW6 cell to apoptosis induction with anti-Fas antibody upon transduction of a reverse fragment to a cDNA encoding human 6A8 alpha-mannosidase

Science in China. Series C, Life Sciences
G ShiL Zhu

Abstract

The effect of transduction with a reverse fragment to a cDNA encoding human 6A8 alpha-mannosidase on apoptosis induction of human B cell line SKW6 by anti-Fas antibody was tested. Apoptosis-inducer of anti-Fas monoclonal antibody was used to induce apoptosis in SKW6 cells. Giemsa's staining, Annexin-V-FLUOS staining and DNA ladder test were used to determine the events of apoptosis. Indirect immunofluorescent staining with anti-Fas antibody was performed to detect the surface Fas expression. In a time-course test of 12, 24 and 36 h for apoptosis induction by anti-Fas antibody, DNA ladder was observed in the wild-type SKW6 cells in a time-dependent fashion. Mock transduction had no effect on DNA ladder production. However, no DNA ladder was detected in the rAAV-antisense 6A8 cDNA-transduced SKW6. Results from Annexin-V-FLUOS staining on anti-Fas antibody-treated cells revealed that the staining-positive rate in the rAAV-antisense 6A8 cDNA-transduced SKW6 cells was decreased in comparison to that in the wild-type and the mock-transduced cells. Giemsa's staining observation showed that the number of dying (with apoptotic bodies) and dead cells was reduced in the rAAV-antisense 6A8 cDNA-transduced SKW6 cells in comparison with that...Continue Reading

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Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis

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