AVB-500 in combination with standard of care demonstrates early proof of concept for anti-tumor activity in platinum-resistant ovarian cancer
Aravive to expand enrollment in Phase 1b Trial of AVB-500 in platinum-resistant ovarian cancer
HOUSTON, July 31, 2019 (GLOBE NEWSWIRE) -- Aravive Inc. (ARAV) today announced that preliminary efficacy data from their ongoing clinical trial with AVB-500 showed compelling anti-tumor activity in the 12 patients treated from the first cohort of the ongoing Phase 1b portion of the Phase 1b/2 trial of AVB-500 in patients with platinum-resistant recurrent ovarian cancer where response to standard of care chemotherapy alone in patients is typically 10-15 percent.
The open-label, Phase 1b safety lead-in portion of the efficacy and safety study of AVB-500 in patients with platinum-resistant recurrent ovarian cancer enrolled patients into two cohorts, one investigating a combination of AVB-500 with pegylated liposomal doxorubicin (PLD) and the other, a combination of AVB-500 with paclitaxel (PAC). The overall best response rate (ORR) in the AVB-500 combination cohorts to date by investigator determined RECIST v1.1 criteria was greater than response rates observed historically with standard of care chemotherapy alone in this clinical setting. The company therefore has decided to expand enrollment in the Phase 1b portion of the study to validate the unanticipated early positive efficacy signal.
The company plans to present the detailed safety, pharmacokinetic, pharmacodynamic and preliminary efficacy results for this cohort at an upcoming scientific meeting.
“We have decided to expand the clinical trial to validate that early positive efficacy signal,” said Laura Bonifacio, PharmD, Ph.D, Vice President of Aravive. “If we continue to see a robust efficacy signal, we plan to work with FDA to explore the most efficient regulatory pathway to bring this drug to the patients in need. We continue to pursue our other pipeline programs, including renal cell carcinoma and renal fibrosis” added Bonifacio.
About Ovarian Cancer
Each year in the United States, more than 22,000 women develop ovarian cancer and there are approximately 14,240 attributed deaths annually, making ovarian cancer the deadliest of gynecologic malignancies. Clinical studies over time have shown little response to treatment, especially for platinum-resistant ovarian cancer. In fact, on average, only 10-15 percent of patients with platinum-resistant ovarian cancer have an objective response to currently approved therapies (Davis et al. Gynecologic Oncology 133 (2014) 624–631). Clearly, there is a need to develop new therapeutic strategies to improve the overall survival of patients who face less than optimal outcomes due to metastasis and treatment resistant ovarian cancer.
AVB-500 (previously called AVB-S6-500) is a therapeutic recombinant fusion protein that has been shown to neutralize GAS6 activity by binding to GAS6 with very high affinity. In doing so, AVB-500 selectively inhibits the GAS6-AXL signaling pathway. In preclinical studies, GAS6-AXL inhibition has shown anti-tumor activity, both as a single agent or in combination with a variety of anticancer therapies including radiation therapy, immuno-oncology agents, and chemotherapeutic drugs that affect DNA replication and repair. Increased expression of AXL and GAS6 in tumors is correlated to poor prognosis and survival and has been implicated in therapeutic resistance to conventional chemotherapeutics and targeted therapies.
A Phase 1 clinical trial in healthy volunteers (NCT03401528) investigating the safety, pharmacokinetics, and pharmacodynamics was completed last year. The study met the safety and tolerability endpoints and demonstrated clinical proof-of-mechanism for AVB-500 in neutralizing GAS6. Based on AVB-500’s favorable safety profile, coupled with its specifically targeted mechanism of action, the protein has the potential to be used both in combination with existing therapies, as well as a maintenance drug. U.S. FDA granted Fast Track Designation to Aravive Biologics’ AVB-S6-500 in platinum-resistant recurrent ovarian cancer in 2018.
Aravive, Inc. (ARAV) is a clinical-stage biopharmaceutical company developing treatments designed to halt the progression of life-threatening diseases, including cancer and fibrosis. Aravive’s lead product candidate, AVB-500, is an ultra-high affinity decoy protein that targets the GAS6-AXL signaling pathway. By capturing serum GAS6, AVB-500 starves the AXL pathway of its signal, potentially halting the biological programming that promotes disease progression. AXL receptor signaling plays an important role in multiple types of malignancies by promoting metastasis, cancer cell survival, resistance to treatments, and immune suppression. The GAS6-AXL signaling pathway also plays a significant role in fibrogenesis. Aravive has initiated the Phase 1b portion of a Phase 1b/2 clinical trial of AVB-500 combined with standard of care therapies in patients with platinum-resistant ovarian cancer, and intends to expand development into additional oncology and fibrotic indications. Aravive is based in Houston, Texas and received a Product Development Award from the Cancer Prevention & Research Institute of Texas (CPRIT) in 2016. Aravive was one of FierceBiotech's Fierce 15 in 2017. For more information, please visit www.aravive.com.
Forward Looking Statements
This press release contains forward-looking statements (including within the meaning of Section 21E of the United States Securities Exchange Act of 1934, as amended, and Section 27A of the United States Securities Act of 1933, as amended), express or implied, concerning the Company's goals, intentions and expectations as to future plans or events, including statements regarding the plans to present the detailed safety, pharmacokinetic, pharmacodynamic and preliminary efficacy results for the first cohort at an upcoming scientific meeting, the potential for AVB-500 to be used both in combination with existing therapies, as well as a maintenance drug, plans to work with FDA to explore the most efficient regulatory pathway to bring this drug to the patients in need, the continued pursuit of the Company’s other pipeline programs, including renal cell carcinoma and renal fibrosis. Forward-looking statements are based on current beliefs and assumptions, are not guarantees of future performance and are subject to risks and uncertainties that could cause actual results to differ materially from those contained in any forward-looking statement as a result of various factors, including, but not limited to, risks and uncertainties related to: the Company’s ability to expand development in 2019 into additional oncology and fibrotic indications, the Company’s dependence upon AVB-500, AVB-500’s ability to have favorable results in clinical trials or receive regulatory approval, potential delays in the Company's clinical trials due to regulatory requirements or difficulty identifying qualified investigators or enrolling patients; the risk that AVB-500 may cause serious side effects or have properties that delay or prevent regulatory approval or limit its commercial potential; the risk that the Company may encounter difficulties in manufacturing AVB-500; if AVB-500 is approved, risks associated with its market acceptance, including pricing and reimbursement; potential difficulties enforcing the Company's intellectual property rights; the Company's reliance on its licensor of intellectual property and financing needs. The foregoing review of important factors that could cause actual events to differ from expectations should not be construed as exhaustive and should be read in conjunction with statements that are included herein and elsewhere, including the risk factors included in the Company's Annual Report on Form 10-K and Form 10-K/A for the fiscal year ended December 31, 2018, recent Quarterly Reports on Form 10-Q, recent Current Reports on Form 8-K and subsequent filings with the SEC. Except as required by applicable law, the Company undertakes no obligation to revise or update any forward-looking statement, or to make any other forward-looking statements, whether as a result of new information, future events or otherwise.
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