Trpm-2 antisense therapy

C - Chemistry – Metallurgy – 07 – H

Patent

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Details

C07H 21/04 (2006.01) A61K 38/00 (2006.01) A61K 41/00 (2006.01) A61K 48/00 (2006.01) C12N 15/11 (2006.01) C12N 15/85 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2371814

It has now been determined that antisense therapy which reduces the expression of TRPM-2 provides therapeutic benefits in the treatment of cancer. In particular, such antisense therapy can be applied in treatment of prostate cancer and renal cell cancer. Addition of antisense TRPM-2 ODN to prostatic tumor cells in vivo is effective for delaying the onset of androgen independence. Thus, prostate cancer can be treated in an individual suffering from prostate cancer by initiating androgen-withdrawal to induce apoptotic cell death of prostatic tumor cells in the individual, and administering to the individual a composition effective to inhibit expression of TRPM-2 by the tumor cells, thereby delaying the progression of prostatic tumor cells to an androgen-independent state in an individual. Combined use of antisense TRPM-2 and taxanes synergistically enhances cytotoxic chemosensitivity of androgen- independent prostate cancer. In addition, it has also been found that antisense TRPM-2 has beneficial effect for other cancer types. Specifically, antisense TRPM-2 ODN enhances chemosensitivity in human Renal cell cancer, a normally chemoresistant disease with no active chemotherapeutic agent having an objective response rate higher than 10 %. Radiation sensitivity is also enhanced when cells expressing TRPM-2 are treated with antisense TRPM-2 ODN. Thus, the antisense TRPM-2 ODNs can be used to enhance hormone sensitivity, chemosensitivity and radiation sensitivity of a variety of cancer types in which expression of TRPM-2 has been observed.

Il a été déterminé que la thérapie anti-sens qui permet de réduire l'expression de TRPM-2, a des effets thérapeutiques dans le traitement du cancer. En particulier, la thérapie anti-sens peut être appliquée au traitement du cancer de la prostate ou de l'hypernéphrome. L'apport in vivo d'anti-sens TRPM-2 oligodésoxynucléotide (TRPM-2 ODN) aux cellules tumorales de la prostate est efficace pour retarder l'apparition d'androgéno-indépendance. De plus, le cancer de la prostate chez un individu peut être traité en créant un manque de substances androgènes provoquant la mort apoptotique des cellules tumorales de la prostate de l'individu, et en administrant à l'individu une composition efficace pour inhiber l'expression de TRPM-2 par les cellules tumorales, ce qui permet de retarder la progression des cellules tumorales de la prostate à un état d'androgéno-indépendance chez l'individu. L'utilisation conjointe d'anti-sens TRPM-2 et de taxanes améliore synergiquement la chimio-sensibilité cytotoxyque du cancer de la prostate androgéno-indépendant. De plus, il a également été déterminé que l'anti-sens TRPM-2 a une action bénéfique sur d'autres types de cancers. Spécifiquement, l'anti-sens TRPM-2 ODN améliore la chimio-sensibilité de l'hypernéphrome, une maladie habituellement chimio-résistante sur laquelle aucun agent de chimiothérapie ne peut avoir un taux de réponses positives supérieur à 10 %. La sensibilité aux rayons se trouve également améliorée lorsque des cellules exprimant TRPM-2 sont traitées avec l'anti-sens TRPM-2 ODN. De ce fait, les anti-sens TRPM-2 ODN peuvent être utilisés pour améliorer la sensibilité hormonale, la chimio-sensibilité et la sensibilité aux rayons dans différents types de cancers dans lesquels on a pu constater l'expression de TRPM-2.

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