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Antineoplastic Agents

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Bevacizumab

Immunoglobulins

Antineoplastic Agents, Immunological

Angiogenesis Inhibitors

Growth Inhibitors

Escalating doses of i.v. TRC105 will be administered weekly beginning with 3 mg/kg in combination with 15 mg/kg bevacizumab given every 3 weeks. Patients will receive TRC105 treatment on Days 1, 8, and 15 and bevacizumab treatment on Day 1 of each 21-day cycle.

TRC105 and Bevacizumab

Charles P Theuer, MD

The purpose of the study is to evaluate safety and tolerability and determine a recommended Phase 2 dose for TRC105 when added to standard dose bevacizumab in patients with advanced solid tumors for which bevacizumab is indicated.

Bevacizumab is a monoclonal antibody to vascular endothelial growth factor (VEGF) that inhibits angiogenesis and extends survival in patients with a wide variety of solid tumor types. TRC105, a monoclonal antibody to CD105, is a novel angiogenesis inhibitor that complements bevacizumab in preclinical models. Together, these antibodies may result in more effective angiogenesis inhibition and improved clinical efficacy over that seen with bevacizumab alone. The purpose of the study is to evaluate safety and tolerability and determine a recommended Phase 2 dose for TRC105 when added to standard dose bevacizumab in patients with advanced solid tumors for which bevacizumab is indicated.

Study of TRC105 Combined With Standard-Dose Bevacizumab for Advanced Solid Tumors for Which Bevacizumab is Indicated

An Open Label Phase 1B Dose-Escalation Study of TRC105 Combined With Standard-Dose Bevacizumab for Advanced Solid Tumors

Three patients will be initially enrolled and treated at each dose level. If none of these 3 patients experiences a dose-limiting toxicity (DLT) during the 28-day evaluation period, dose escalation will proceed following review of safety data with appropriate site staff including the principal investigators at all sites. If 1 of 3 patients experiences DLT, the cohort will be expanded to 6 patients. The maximum tolerated dose (MTD) will have been exceeded if ≥ 33% of patients experience DLT in a given cohort. DLT will have occurred when a patient has 1 or more toxicity listed in the table below that is at least possibly related to the combination of bevacizumab and TRC105 during the first 28 days (cycle 1).

Plasma TRC105 concentrations will be measured at specified timepoints.

HAMA and HACA titers will be measured at specified time-points.

The best response according to RECIST 1.1 for each patient with measurable disease and who received at least one dose of study drug will be listed by cohort and tumor type

Tracon Pharmaceuticals Inc.

Escalating doses of TRC105 were studied in combination with standard dose bevacizumab. In accordance with the original protocol, patients in cohorts 1 and 2 received TRC105 on day 1, day 8, and day 15 and bevacizumab on day 1 of each 3 week cycle. Cohort 3 and 4 patients received TRC105 on days 8, 15, and 22 and bevacizumab on days 1 and 15 of cycle 1 (4 week cycle), and cohort 4a and 5 patients received TRC105 on days 8, 11, 15, and 22 and bevacizumab on days 1 and 15 of cycle 1 (4 week cycle). Beyond cycle 1, patients in cohorts 3, 4, 4a, and 5 received TRC105 on days 1, 8, 15 and 22 and bevacizumab on days 1 and 15 of each 4 week cycle.

Spots Global Cancer Trial Database for Study of TRC105 Combined With Standard-Dose Bevacizumab for Advanced Solid Tumors for Which Bevacizumab is Indicated

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