FRAZER, Pa., Aug. 3 /PRNewswire-FirstCall/ -- Cephalon, Inc. (Nasdaq: CEPH) today announced that the Journal of Clinical Oncology has published data from a pivotal phase 3 study demonstrating that TREANDA(R) (bendamustine HCl) for Injection improved clinical outcomes when compared to chlorambucil in patients with chronic lymphocytic leukemia (CLL). Results of this study were the basis of the March 2008 U.S. Food and Drug Administration (FDA) approval of TREANDA for CLL, the first agent approved by the FDA for this disease since 2001. According to the American Cancer Society, there will be more than 15,000 new cases of CLL diagnosed in 2009 alone. The study results were published online today and will also appear in the print edition later this year.
This Phase 3, randomized, international, multicenter, open-label study evaluated the efficacy and safety of TREANDA compared to chlorambucil in previously untreated patients with advanced (Binet stage B-C) CLL. Patients received TREANDA (100 mg per square meter on days 1 and 2) (n=162) or chlorambucil (0.8 mg/kg on days 1 and 15) (n=157) for up to six treatment cycles. In this study, TREANDA demonstrated significantly better outcomes for both primary endpoints compared to chlorambucil: overall response rate and progression-free survival (PFS).The overall response rate was significantly higher in patients receiving TREANDA than chlorambucil (68% vs. 31%; p<0.0001). Patients in the TREANDA treatment arm also had a higher complete response rate than those treated with chlorambucil (31% vs. 2%) which means that after treatment with TREANDA, some patients had no signs of CLL in their blood.
"CLL is the most common form of adult leukemia in the Western world. Because it is incurable, the goal of treatment is to stabilize the cancer over the long-term by extending periods of remission," said Prof. Wolfgang Knauf, Onkologische Gemeinschaftspraxis, Frankfurt, Germany and lead investigator of this study. "Treatment options are limited for those with advanced CLL, but this study shows that bendamustine demonstrates significantly better efficacy compared to chlorambucil with a tolerable safety profile."
The study also showed that patients treated with TREANDA had significantly longer PFS compared to chlorambucil (median PFS 21.6 months vs. 8.3 months; p<0.0001). TREANDA was also associated with an improvement in duration of response compared to chlorambucil (21.8 months vs. 8 months). In the study, TREANDA demonstrated a tolerable safety profile; the most common adverse events included myelosuppression, fever, nausea, vomiting and diarrhea.
