On June 1, 2020 VBL Therapeutics (Nasdaq: VBLT), reported the presentation of the positive outcome of pre-planned interim analysis results from the OVAL Phase 3 pivotal clinical trial in platinum-resistant ovarian cancer at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) 2020 virtual annual meeting (Press release, VBL Therapeutics, JUN 1, 2020, View Source [SID1234558783]).
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The analysis compared the CA-125 objective response rate (ORR) according to GCIG criteria in the treatment and control arms among the first 60 evaluable patients. The CA-125 ORR in those patients was 53%. Assuming a balanced randomization, the response rate in the treatment arm (VB-111 in addition to weekly paclitaxel) was 58% or higher. In patients who had post-dosing fever, which is a marker for VB-111 treatment, the response rate was 69%.
The CA-125 response rate observed in the Phase 3 interim analysis is at least as good as the response rate seen in the prior Phase 2 study, which enrolled a similar patient population and showed overall survival benefit. In the previously reported Phase 2 study of VB-111 in platinum resistant ovarian cancer, 58% of the patients treated with VB-111 and paclitaxel demonstrated a CA-125 response. Those patients with a CA-125 response demonstrated a median overall survival of 808 days, versus 351 days for those patients without a CA-125 response.
"The OVAL interim data are very encouraging as they demonstrate the potential benefit of VB-111 over standard-of-care in a randomized-controlled setting," said Tami Rachmilewitz, M.D., Vice President Clinical Development of VBL Therapeutics. "With over 25% of the patients already enrolled in the study, we look forward to further advancing the OVAL study by expansion to Europe and Japan later this year."
For VBL’s presentation at ASCO (Free ASCO Whitepaper) see: Link
About the OVAL (VB-111-701/GOG-3018) study (NCT03398655)
OVAL is an international Phase 3 randomized, double-blind, placebo-controlled potential registration clinical trial that compares a combination of VB-111 and paclitaxel to placebo plus paclitaxel, in patients with platinum-resistant ovarian cancer. The study is planned to enroll approximately 400 patients. OVAL is conducted in collaboration with the GOG Foundation, Inc., an independent international non-profit organization with the purpose of promoting excellence in the quality and integrity of clinical and basic scientific research in the field of gynecologic malignancies.
About VB-111 (ofranergene obadenovec)
VB-111 is a first-in-class, targeted anti-cancer gene-therapy agent that is being developed to treat a wide range of solid tumors. VB-111 is a unique biologic agent that uses a dual mechanism to target solid tumors. Its mechanism combines blockade of tumor vasculature with an anti-tumor immune response. VB-111 is administered as an IV infusion once every 6-8 weeks. It has been observed to be well-tolerated in >300 cancer patients and demonstrated activity signals in an "all comers" Phase 1 trial as well as in three tumor-specific Phase 2 studies. VB-111 has received an Orphan Designation for the treatment of ovarian cancer from the European Commission. VB-111 has also received orphan drug designation in both the US and Europe, and fast track designation in the US for prolongation of survival in patients with rGBM. VB-111 successfully demonstrated proof-of-concept and survival benefit in Phase 2 clinical trials in radioiodine-refractory thyroid cancer and recurrent platinum-resistant ovarian cancer (NCT01711970).