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Phase I trial of bortezomib and dacarbazine in melanoma and soft tissue sarcoma.


ABSTRACT: Preclinical studies in human melanoma cell lines and murine xenograft tumor models suggest that the proteasome inhibitor bortezomib enhances the activity of the cytotoxic agent dacarbazine. We performed a phase I trial of bortezomib and dacarbazine in melanoma, soft tissue sarcoma, and amine precursor uptake and decarboxylation tumors. The primary objective was to identify recommended phase II doses for the combination.Bortezomib and dacarbazine were both administered intravenously once weekly. All patients received prophylactic antiemetics. Dose escalation proceeded using a standard 3 + 3 design. Response was assessed according to NCI RECIST v1.0.Twenty eight patients were enrolled to six dose levels. Bortezomib 1.6 mg/m(2) and dacarbazine 580 mg/m(2) are the recommended phase II weekly doses. The combination was generally well tolerated. Among 15 patients with melanoma there was one durable complete response in a patient with an exon-11 cKIT mutation, and one partial response. Among 12 patients with soft tissue sarcoma there was one partial response.Bortezomib 1.6 mg/m(2) and dacarbazine 580 mg/m(2) administered intravenously once weekly is well tolerated and has at least minimal activity in melanoma and soft tissue sarcoma.

SUBMITTER: Poklepovic A 

PROVIDER: S-EPMC3844155 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature

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Phase I trial of bortezomib and dacarbazine in melanoma and soft tissue sarcoma.

Poklepovic Andrew A   Youssefian Leena E LE   Winning Mary M   Birdsell Christine A CA   Crosby Nancy A NA   Ramakrishnan Viswanathan V   Ernstoff Marc S MS   Roberts John D JD  

Investigational new drugs 20130113 4


<h4>Purpose</h4>Preclinical studies in human melanoma cell lines and murine xenograft tumor models suggest that the proteasome inhibitor bortezomib enhances the activity of the cytotoxic agent dacarbazine. We performed a phase I trial of bortezomib and dacarbazine in melanoma, soft tissue sarcoma, and amine precursor uptake and decarboxylation tumors. The primary objective was to identify recommended phase II doses for the combination.<h4>Experimental design</h4>Bortezomib and dacarbazine were b  ...[more]

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