• Jaime R Merchan, Rui Qin, Henry Pitot, Joel Picus, Glenn Liu, Tom Fitch, William J Maples, Patrick J Flynn, Briant F Fruth, and Charles Erlichman.
• Sylvester Comprehensive Cancer Center, University of Miami, 1475 NW. 12 Avenue. Suite 3400, Miami, FL, 33136, USA, jmerchan2@med.miami.edu.
• Cancer Chemother. Pharmacol. 2015 Mar 1; 75 (3): 485-93.

PurposeBevacizumab or temsirolimus regimens have clinical activity in the first-line treatment of advanced renal cell carcinoma (RCC). This phase I/II trial was conducted to determine the safety of combining both agents and its efficacy in RCC patients who progressed on at least one prior anti-VEGF receptor tyrosine kinase inhibitor (RTKI) agent.MethodsIn the phase I portion, eligible patients were treated with temsirolimus (25 mg IV weekly) and escalating doses of IV bevacizumab (level 1 = 5 mg/kg; level 2 = 10 mg/kg) every other week. The primary endpoint for the phase II portion (RTKI resistant patients) was the 6-month progression-free rate. Secondary endpoints were response rate, toxicity evaluation, and PFS and OS.ResultsMaximum tolerated dose was not reached at the maximum dose administered in 12 phase I patients. Forty evaluable patients were treated with the phase II recommended dose (temsirolimus 25 mg IV weekly and bevacizumab 10 mg/kg IV every 2 weeks). The 6-month progression-free rate was 40 % (16/40 pts). Median PFS was 5.9 (4-7.8) months, and median OS was 20.6 (11.5-23.7) months. Partial response, stable disease, and progressive disease were seen in 23, 63, and 14 % of patients, respectively. Most common grade 3-4 AEs included fatigue (17.8 %), hypertriglyceridemia (11.1 %), stomatitis (8.9 %), proteinuria (8.9 %), abdominal pain (6.7 %), and anemia (6.7 %). Baseline levels of serum sFLT-1 and VEGF-A were inversely correlated with PFS and OS, respectively.ConclusionsTemsirolimus and bevacizumab is a feasible combination in patients with advanced RCC previously exposed to oral anti-VEGF agents. The safety and efficacy results warrant further confirmatory studies in this patient population.

31 keywords...

hide…