Broad patent covers anti-androgen or androgen antagonist drugs, including combination treatment with Zytiga®, Xtandi® and Erleada® in multibillion-dollar market
Combination may enhance efficacy and increase duration of response to current therapies
SAN DIEGO/PRNewswire/ -- Trovagene, Inc. (Nasdaq: TROV), a clinical-stage oncology therapeutics company, developing drugs that target cell division (mitosis) for the treatment of leukemias, lymphomas and solid tumor cancers, today announced the issuance of a new patent (10,155,006), entitled Combination Therapies and Methods of Use Thereof for Treating Cancer, by the U.S. Patent and Trademark Office (USPTO). This patent broadens previously issued patent (9,566,280), by expanding the use of Onvansertib to encompass combination therapies with any anti-androgen and androgen antagonist drug, such as Zytiga, Xtandi and Erleada for the treatment of metastatic and non-metastatic castrate-resistant prostate cancer.
The issuance of this patent further strengthens Trovagene's existing intellectual property portfolio obtained with the licensing of exclusive global development and commercialization rights to Onvansertib, a first-in-class, 3rd generation Polo-like Kinase 1(PLK1) inhibitor, from Nerviano Medical Sciences (NMS). NMS is a world-renowned oncology R&D organization and widely recognized for the development of protein kinase inhibitors (e.g., Onvansertib).
"There is a need for new therapies that effectively treat cancers that depend on internal androgen signaling, such as castration-resistance prostate cancer, as well as cancers which overexpress androgen receptor (AR), or are otherwise dependent on the synthesis of steroid hormones for their growth," said Dr. Michael Yaffe, Director, MIT Center for Precision Cancer Medicine, David H. Koch Professor in Science, Professor of Biological Engineering, and member of the Koch Institute for Integrative Cancer Research.
"The novel discovery by Dr. Yaffe and his team at MIT, demonstrating synergy with the combination of Onvansertib with anti-androgens, was fundamental to initiating our now ongoing Phase 2 trial of Onvansertib in combination with Zytiga® (abiraterone acetate) for the treatment of metastatic Castration-Resistant Prostate Cancer (mCRPC), which is being conducted by the Harvard Medical Cancer Centers," said Dr. Thomas Adams, Chief Executive Officer and Chairman of Trovagene. "The issuance of this new patent expands the potential market opportunity for Onvansertib in both metastatic and non-metastatic prostate cancer with combination regimens that include multibillion-dollar drugs Zytiga®, Xtandi® and Erleada®."
About the Phase 2 Clinical Trial in mCRPC
In this multi-center, open-label, Phase 2 trial, Onvansertib in combination with the standard dose of Zytiga® (abiraterone acetate) and prednisone, all administered orally, is being evaluated for safety and efficacy. The trial will enroll up to 45 patients with mCRPC showing early signs of disease progression demonstrated by two rising PSA values separated by at least one week, while on Zytiga®/prednisone therapy. The primary efficacy endpoint is the proportion of patients achieving disease control after 12 weeks of study treatment, as defined by lack of prostate specific antigen (PSA) progression in patients who are showing signs of early progressive disease (rise in PSA but minimally symptomatic or asymptomatic) while currently receiving abiraterone acetate and prednisone (NCT03414034).
Onvansertib is a first-in-class, 3rd generation, oral and highly-selective adenosine triphosphate (ATP) competitive inhibitor of the serine/threonine polo-like-kinase 1 (PLK 1) enzyme, which is over-expressed in multiple cancers, including leukemias, lymphomas and solid tumors. Separate studies with other PLK inhibitors have shown that inhibition of polo-like-kinases can lead to tumor cell death, including a Phase 2 study in Acute Myeloid Leukemia (AML) where response rates of up to 31% were observed when combined with a standard therapy for AML (low-dose cytarabine-LDAC) versus treatment with LDAC alone with a 13.3% response rate. A Phase 1 open-label, dose escalation safety study of Onvansertib has been completed in patients with advanced metastatic solid tumor cancers and published in Investigational New Drugs. The maximum tolerated dose (MTD) or recommended Phase 2 dose (RP2D) in this trial was 24 mg/m2. Trovagene has an ongoing Phase 1b/2 clinical trial with Onvansertib in AML that was accepted by the National Library of Medicine (NLM) and is now publicly viewable on www.clinicaltrials.gov. The NCT number assigned by clinicaltrials.gov for this study is NCT03303339. Onvansertib has been granted Orphan Drug Designation by the FDA in the U.S. and by the EC in the European Union (EU) for the treatment of patients with AML.
Onvansertib targets the PLK1 isoform, only (not PLK2 or PLK3), is orally administered, has a 24-hour drug half-life with only mild to moderate side effects reported. Trovagene believes that targeting only PLK1 and having a favorable safety and tolerability profile, along with an improved dose/scheduling regimen will significantly improve on the outcome observed in previous studies with a former panPLK inhibitor in AML.
Onvansertib has demonstrated synergy in preclinical studies with numerous chemotherapies and targeted therapeutics used to treat leukemias, lymphomas and solid tumor cancers, including FLT3 and HDAC inhibitors, taxanes, and cytotoxins. Trovagene believes the combination of its targeted PLK1 inhibitor, Onvansertib, with other compounds has the potential to improve clinical efficacy in Acute Myeloid Leukemia (AML), metastatic Castration-Resistant Prostate Cancer (mCRPC), Non-Hodgkin Lymphoma (NHL), Triple Negative Breast Cancer (TNBC), as well as other types of cancer.
Certain statements in this press release are forward-looking within the meaning of the Private Securities Litigation Reform Act of 1995. These statements may be identified by the use of words such as "anticipate," "believe," "forecast," "estimated" and "intend" or other similar terms or expressions that concern Trovagene's expectations, strategy, plans or intentions. These forward-looking statements are based on Trovagene's current expectations and actual results could differ materially. There are a number of factors that could cause actual events to differ materially from those indicated by such forward-looking statements. These factors include, but are not limited to, our need for additional financing; our ability to continue as a going concern; clinical trials involve a lengthy and expensive process with an uncertain outcome, and results of earlier studies and trials may not be predictive of future trial results; our clinical trials may be suspended or discontinued due to unexpected side effects or other safety risks that could preclude approval of our product candidates; uncertainties of government or third party payer reimbursement; dependence on key personnel; limited experience in marketing and sales; substantial competition; uncertainties of patent protection and litigation; dependence upon third parties; our ability to develop tests, kits and systems and the success of those products; regulatory, financial and business risks related to our international expansion and risks related to failure to obtain FDA clearances or approvals and noncompliance with FDA regulations. There are no guarantees that any of our technology or products will be utilized or prove to be commercially successful. Additionally, there are no guarantees that future clinical trials will be completed or successful or that any precision medicine therapeutics will receive regulatory approval for any indication or prove to be commercially successful. Investors should read the risk factors set forth in Trovagene's Form 10-K for the year ended December 31, 2017, and other periodic reports filed with the Securities and Exchange Commission. While the list of factors presented here is considered representative, no such list should be considered to be a complete statement of all potential risks and uncertainties. Unlisted factors may present significant additional obstacles to the realization of forward-looking statements. Forward-looking statements included herein are made as of the date hereof, and Trovagene does not undertake any obligation to update publicly such statements to reflect subsequent events or circumstances.
VP, Corporate Communications