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  • Title: Genasense (Genta Inc).
    Author: Banerjee D.
    Journal: Curr Opin Investig Drugs; 2001 Apr; 2(4):574-80. PubMed ID: 11566020.
    Abstract:
    Genasense (formerly known as G-3139), an antisense oligonucleotide specific for Bcl-2, is under development by Genta as an iv drip infusion for the potential treatment of various cancers including melanoma, prostate, breast and colon cancer [3083751. It is in phase III trials for malignant melanoma, for which it has been awarded Fast Track status 1359044]. Genasense received Orphan Drug status in August 2000 [3782331. In September 2000, the company announced that pivotal phase III trials in multiple melanoma, chronic lymphocytic leukemia (CLL) and acute myelocytic leukemia (AML) would be underway by 2001 [382783]. By January 2001, trials in AML and CLL had been initiated 1396512]. As of February 2001, Genta was planning the initiation of two additional, registration quality trials. Pending positive results from these trials, launch of Genasense is anticipated in 2002 13984111. A phase III trial in patients with advanced multiple myeloma at 65 centers in the US, Canada and Great Britain began in February 2001. The trial will examine whether the addition of Genasense can improve response rates, response duration and quality of life compared with dexamethasone therapy alone 13989081. Genta Inc has been issued a patent (US-05831066) for Genasense 1283005]. The patent provides protection to Genta for the composition of Genasense and its analogs. Furthermore, Genta Inc has also been issued two new patents that cover a series of compounds containing new backbone constructions that enhance the antisense affinity of the drug to the target pre-RNA, while the other patent covers the methods for preparation of antisense oligonucleotides containing the new backbone structures 12896851. Genta has already licensed the rights for the use of Bd-2 as a target for antisense- and gene therapy-based treatments from The University of Pennsylvania. The licensing agreements with Chugai Pharmaceutical Co for worldwide marketing and profit sharing places Genta in a favorable position. In January 2001, Needham & Co expected Genasense to have a potential market of 47,700 malignant melanoma patients in the US. The analysts also expected potential patient market sizes of 50,000 (CLL), 21,000 (AML), 136,000 (non-small cell lung cancer; NSLCC) and 180,000 (prostate cancer) in the US. In addition, the analysts predicted that Genasense would be approved for melanoma in the second quarter of 2002, with approvals to follow for CLL (third quarter of 2002), AML (third quarter of 2002) and myeloma (fourth quarter of 2002) 1399251].
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