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  • Title: Oblimersen sodium (Genasense bcl-2 antisense oligonucleotide): a rational therapeutic to enhance apoptosis in therapy of lung cancer.
    Author: Herbst RS, Frankel SR.
    Journal: Clin Cancer Res; 2004 Jun 15; 10(12 Pt 2):4245s-4248s. PubMed ID: 15217967.
    Abstract:
    Bcl-2 protein inhibits apoptosis and confers resistance to treatment with traditional cytotoxic chemotherapy, radiotherapy, and monoclonal antibodies. Oblimersen sodium is an antisense oligonucleotide compound designed to specifically bind to human bcl-2 mRNA, resulting in catalytic degradation of bcl-2 mRNA and subsequent decrease in bcl-2 protein translation. Both small cell and non-small cell lung cancer show baseline and inducible expression of bcl-2, which may contribute to resistance to therapy. Preclinical studies have shown that combining bcl-2 antisense with chemotherapy improves antitumor response, increases apoptosis of tumor cells, and increases survival. Preliminary data from a large international randomized trial in melanoma show a trend toward increased survival and significantly improved response rates and response duration when oblimersen is added to dacarbazine. Phase I studies in small cell lung cancer patients demonstrate that oblimersen can be combined with paclitaxel or carboplatin and etoposide. The combination of docetaxel and oblimersen has been shown to be feasible in Phase I studies and is currently undergoing evaluation in comparison with docetaxel alone as first-line salvage therapy in patients refractory or relapsed after one prior chemotherapy regimen. Enhancement of the efficacy of anticancer treatments with oblimersen bcl-2 antisense therapy represents a promising new apoptosis-modulating strategy.
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