Frontline use of bevacizumab in ovarian cancer: Experience from India.

Background: Ovarian cancer is the second most common gynaecological malignancy in India. Despite relatively high response rates to first-line carboplatin and paclitaxel-based chemotherapy in epithelial ovarian cancer (EOC), the majority of patients experience multiple relapses and finally become resistant. Vascular endothelial growth factor (VEGF) promotes progression of ovarian cancer. Bevacizumab, a recombinant humanized monoclonal antibody directed against VEGF-A is an anti-angiogenesis agent. Data on the use of bevacizumab for EOC from India are not available. We, therefore, studied the use of bevacizumab in ovarian cancer.

Methods: In this prospective, non-randomized study, 10 patients who received bevacizumab were compared with 20 age- and stage-matched controls. After maximal surgical debulking, patients in the bevacizumab arm received bevacizumab 15 mg/kg i.v. on day 1 every 3 weeks followed by paclitaxel and carboplatin from cycle 1. After 6 cycles, bevacizumab was continued for 1 year. Controls received paclitaxel 1 75 mg/m2 and carboplatin only for 4-8 cycles. The outcome measures were adverse effects and progression-free survival.

Results: Haematological toxicity (i.e. neutropenia, thrombocytopenia and anaemia) was similar in both arms. Hypertension (40% v. 10%, p = 0.04) and bleeding-related complications (50% v. 0%, p = 0.002) were more in the bevacizumab arm. However, gastrointestinal (GI) perforations were not increased. The median progression-free survival was similar in both arms; 26 months versus 21 months (p = 0.57).

Conclusion: In this small group of patients, addition of bevacizumab increased the toxicity of chemotherapy.