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Positive Phase III Results Reported for Abraxane (Paclitaxel) in Metastatic Pancreatic Cancer

Nab-paclitaxel/gemcitabine is more effective than gemcitabine alone (October 16)

Positive results have been reported from the phase III Metastatic Pancreatic Adenocarcinoma Clinical Trial (MPACT) of Abraxane (paclitaxel protein-bound particles for injectable suspension, albumin-bound [nab-paclitaxel]; Celgene International Sàrl) in combination with gemcitabine (Gemzar, Eli Lilly). The new findings were reported online in the New England Journal of Medicine.

The MPACT trial was an open-label randomized study of 861 previously untreated patients with metastatic pancreatic cancer in North America, Europe, and Australia.

The patients were randomly assigned to treatment with nab-paclitaxel and gemcitabine (n = 431) or gemcitabine alone (n = 430). Patients in the nab-paclitaxel/gemcitabine group received nab-paclitaxel as an intravenous (IV) infusion over 30 to 40 minutes at a dose of 125 mg/m2 followed by gemcitabine as an IV infusion over 30 to 40 minutes at a dose of 1,000 mg/m2 given on days 1, 8, and 15 of each 28-day cycle. In the comparator treatment group, gemcitabine monotherapy was administered at a dose of 1,000 mg/m2 given weekly for 7 weeks followed by a 1-week rest period in cycle 1. In cycle 2 and onwards, gemcitabine was administered on days 1, 8, and 15 of a 28-day cycle. The study’s primary endpoint was overall survival (OS).

The median OS was 8.5 months in the nab-paclitaxel/gemcitabine group compared with 6.7 months in the gemcitabine group (hazard ratio [HR] for death, 0.72; P P P

Sources: Celgene; October 16, 2013; and NEJM; October 16, 2013.

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