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  • Title: Co-transduction of p27Kip1 strongly augments Fas ligand- and caspase-8-mediated apoptosis in U-373MG glioma cells.
    Author: Shinoura N, Furitsu T, Asai A, Kirino T, Hamada H.
    Journal: Anticancer Res; 2001; 21(5):3261-8. PubMed ID: 11848481.
    Abstract:
    BACKGROUND: p27Kip1 is a potential tumor suppressor gene. As malignant gliomas express Fas at high levels, the relationship between Fas-mediated apoptosis and p27Kip1 expression may improve therapeutic approaches for treating gliomas. MATERIALS AND METHODS: In this study, we transduced U-373MG glioma cells with the Fas ligand or caspase-8 genes using adenovirus vectors after transduction of the p27Kip1 gene to induce cell cycle arrest in U-373MG cells, and evaluated the degree of apoptosis. RESULTS: The results demonstrate that expression of p27Kip1 enhanced Fas ligand- or caspase-8-mediated apoptosis in U-373MG cells. Expression of apoptosis-related genes such as Bax, Bcl-X(L), Bcl-2 or caspase-8 were reduced by p27Kip1 transduction compared with that of beta-actin, whereas p27Kip1 transduction did not affect the expression level of Fas or the Fas ligand. CONCLUSION: Combined transduction of p27Kip1 with Fas ligand or caspase-8 would overide the resistance mechanism to apoptosis in malignant gliomas.
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