Abstract
The primary goal of this trial was to evaluate the confirmed response rate of temsirolimus (CCI-779), a mammalian target of rapamycin in patients with advanced soft tissue sarcomas (STS). Patients ≥18 years with measurable advanced STS, no prior chemotherapy for metastatic disease (adjuvant and neoadjuvant chemotherapy allowed), adequate organ function, and performance status of ≤2 were eligible. After premedication with an antihistamine, CCI-779 was given intravenously at 25 mg over 30 minutes on Days 1, 8, 15, and 22, repeated every 4 weeks. The primary endpoint was confirmed response rate per Response Evaluation Criteria in Solid Tumors. Between June 2004 and November 2005, a total of 41 patients were enrolled and began treatment; 40 patients are evaluable for response and adverse events. The median age was 62 years (range, 28-72 years) with 56% women. Eighty percent had high-grade STS, and 22% had prior adjuvant chemotherapy. There were 2 patients (5%; 95% confidence interval [CI], 1-17) (undifferentiated fibrosarcoma and uterine leiomyosarcoma) who achieved a confirmed partial response lasting 3 and 17 months, respectively. Thirty-nine (95%) patients have progressed, with a median time to progression of 2.0 months (95% CI, 1.8-3.5). The median overall survival was 7.6 months (95% CI, 6.1-15.9). Forty-three percent experienced grade 3+ adverse events that were possibly related to therapy. Temsirolimus in this patient population of STS had limited clinical activity and had moderate toxicities.
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