Sara Freeman/IMNG Medical Media
Dr. Petronella Witteveen
Although no difference between the treatment arms could be seen in the final overall survival analysis, exploratory findings hinted that patients who received bevacizumab in combination with weekly paclitaxel might have had a survival advantage. The median overall survival in the cohort of patients who received bevacizumab in addition to weekly paclitaxel (n = 60) was 22.4 months vs. 13.2 months in the patients who received the chemotherapy alone (n = 55; HR, 0.65). Overall survival in the topotecan and PLD cohorts did not show any benefit of the addition of bevacizumab, with median overall survival times of just over 13-14 months whether or not bevacizumab was added to chemotherapy.
Updated safety findings showed no undue concerns or new side effects, with a higher percentage of patients experiencing hypertension if treated with bevacizumab rather than chemotherapy alone (7.8% vs. 1.1%). "There were strict instructions to try to reduce the number of gastrointestinal perforations," Dr. Witteveen noted. This resulted in a low rate (1.1% vs. 0%) of this adverse event, she observed
"Practice-changing trials"
"I think these are practice-changing trials," Dr. Kristeleit commented, stating that bevacizumab is clearly an active drug in advanced bulky ovarian cancer.
Based on the ICON7 findings, "first-line bevacizumab and 3-weekly chemotherapy should be considered a standard of care in high risk ovarian cancer," she said.
Meanwhile AURELIA shows, "Bevacizumab with weekly paclitaxel should be considered a new paradigm in platinum-resistant ovarian cancer."
Bevacizumab (Avastin) was recently approved for use in combination with chemotherapy in the first- and second-line treatment of advanced ovarian cancer in Europe. In the second-line setting, it is indicated in platinum-sensitive disease and not platinum-resistant disease as tested in the AURELIA trial. Bevacizumab is not currently licensed for ovarian cancer treatment in the United States.
Roche sponsored the AURELIA study. Dr. Witteveen had no conflicts of interest; some of her coinvestigators disclosed ties with Roche, GlaxoSmithKline, and Novartis. ICON-7 was funded by Roche and the National Institute for Health Research through the National Cancer Research Network in the United Kingdom. Dr. Oza disclosed ties with Roche. Dr. Kristeleit disclosed ties with Roche, Clovis, Janssen, Lytix, and Novartis.