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Thirteen of fourteen (93%) evaluable patients achieved disease control, with twelve (86%) showing tumor shrinkage
SAN DIEGO and CALGARY, AB, Dec. 8, 2022 /CNW/ -- Oncolytics Biotech® Inc.'s (NASDAQ:ONCY) (TSX:ONC) Chinese partner Adlai Nortye today announced interim results from a multicenter, single-arm bridging clinical trial to evaluate the safety, tolerability, and preliminary efficacy of pelareorep-paclitaxel combination therapy in Chinese patients with advanced/metastatic HR+/HER2- breast cancer. The data were featured in a poster presented yesterday at the San Antonio Breast Cancer Symposium (SABCS), which is being held at the Henry B. González Convention Center in San Antonio, Texas through December 10, 2022.
Fifteen patients were treated in the trial as of the data cut-off date (September 26, 2022), with fourteen having had at least one post-baseline tumor assessment (i.e., evaluable for efficacy). All patients enrolled into the trial were previously treated with at least one endocrine therapy and no more than one line of chemotherapy for recurrent/metastatic disease. Data and conclusions presented in the poster are summarized below.
"These impressive results have us well-positioned to leverage Oncolytics' prior positive data and join pelareorep's global development program," said Lars Birgerson, M.D., Ph.D., Adlai Nortye President and Chief Medical Officer. "With no SAEs reported, the data suggests the favorable safety and potent anti-cancer activity displayed by the studied combination in North American HR+/HER2- breast cancer patients extends to the Chinese population. There are also promising signs of pelareorep-paclitaxel combination therapy driving durable clinical benefit, with one patient notably still on study for nearly a year while maintaining a PR. We look forward to further characterizing the efficacy and durability of the studied combination as data from the trial mature and to continuing our collaboration with Oncolytics."
Data from the bridging trial are expected to accelerate Adlai Nortye's development of pelareorep in China by allowing future regulatory submissions to include data from Oncolytics' North American metastatic breast cancer trials, IND-213 and BRACELET-1. IND-213 is a previously completed randomized phase 2 trial that showed a statistically significant near doubling of median overall survival when HR+/HER2- metastatic breast cancer patients were treated with paclitaxel plus pelareorep vs. paclitaxel alone. BRACELET-1 is an ongoing randomized phase 2 trial in HR+/HER2- metastatic breast cancer patients with cohorts evaluating: (1) paclitaxel monotherapy; (2) paclitaxel plus pelareorep; and (3) paclitaxel plus pelareorep in combination with the anti-PD-L1 inhibitor avelumab. Oncolytics expects to report overall response rate, PFS, and evolving overall survival data from BRACELET-1 at a major medical meeting in the first half of 2023.
Dr. Matt Coffey, President and Chief Executive Officer of Oncolytics Biotech Inc., commented, "BRACELET-1's upcoming readout represents a crucial catalyst for Oncolytics, as data from the trial are expected to pave the way for pelareorep's advancement to a registrational breast cancer study. We believe Adlai Nortye's latest data significantly de-risk this upcoming readout as they validate IND-213's positive results by confirming the ability of pelareorep plus paclitaxel to drive durable clinical responses in HR+/HER2- breast cancer patients. I'd like to thank Adlai Nortye for the productive partnership that led to these results, providing us with added enthusiasm for the outlook of our breast cancer program."
A copy of the SABCS poster (P3-07-04), entitled, A Multicenter, Single-Arm, Open-Label Phase I Study of AN1004 (Pelareorep) Oncolytic Virus Plus Paclitaxel in Chinese Patients with Hormone Receptor-Positive and HER2-Negative Advanced/Metastatic Breast Cancer (REO 026-1), will be available on the Posters & Publications page of Oncolytics' website (LINK) following the conclusion of the symposium.
