Sirexatamab

Leap Therapeutics reported mixed results on Tuesday for an experimental treatment in gastric and colorectal cancer, announcing it is only moving forward with the latter indication. The biotech’s shares $LPTX fell nearly 70% on Tuesday morning to about 66 cents per share. The gastric cancer combo was Leap’s most advanced program. The gastric cancer portion of Leap’s Phase 2 DisTinGuish study enrolled 170 patients with first-line, advanced HER2-negative cancer. The patients received either Leap’s targeted drug sirexatamab on top of BeiGene’s checkpoint inhibitor Tevimbra and chemotherapy, or Tevimbra and chemotherapy alone. Sirexatamab is an antibody that targets DKK1, a protein that’s involved in a key cell pathway called the Wnt signaling pathway. The experimental group had a response rate of 52% when evaluated by blinded independent review, compared to 42% in the control group. Meanwhile, by investigator review, the groups had response rates of 52% and 56%, respectively. “While demonstrating activity in biomarker populations, the study did not generate a clear positive signal and will be negative on the primary PFS endpoints when the study completes, resulting in the decision not to move forward with Phase 3 studies in gastric cancer,” Leap said in a press release. In the same release, Leap chief medical officer Cynthia Sirard noted the “high level of discordance” between investigator and blinded review, saying “gastric cancer is a difficult tumor to assess radiologically.” The biotech is preparing another sirexatamab combo for a Phase 3 study in colorectal cancer after reporting initial Phase 2 data in that indication on Tuesday. The colorectal cancer portion of Leap’s Phase 2 study focuses on patients with microsatellite stable disease who previously tried one treatment for advanced cancer. As of the Jan. 3 data cutoff, the study included 188 patients who were split into two groups; the experimental group received sirexatamab plus bevacizumab and chemotherapy, and the control group received bevacizumab and chemotherapy alone. The experimental arm had a response rate of 35%, while the control arm had a response rate of 23%. Leap also broke down results by various subgroups, and it is weighing which populations to include in the Phase 3 study in colorectal cancer. The company said potential Phase 3 populations for the trial could include “DKK1 biomarker-selected, anti-VEGF naïve, anti-EGFR experienced, or RAS-wt patients.”

CAMBRIDGE, Mass., Nov. 13, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today reported financial results for the third quarter ended September 30, 2024. Leap Highlights: Completed enrollment in the expanded randomized controlled Part B of the Phase 2 DeFianCe study evaluating DKN-01, Leap's anti-DKK1 monoclonal antibody, in combination with standard of care bevacizumab and chemotherapy in second-line patients with advanced colorectal cancer (CRC); data expected in mid-2025 Patient follow-up continuing in the randomized controlled Part C of the Phase 2 DisTinGuish study evaluating DKN-01 in combination with tislelizumab and chemotherapy in first-line patients with advanced gastroesophageal junction (GEJ) and gastric cancer; data expected in late 2024 or early 2025 Initiated development of FL-501, Leap's anti-GDF-15 monoclonal antibody "We have made significant progress advancing our pipeline this quarter, including the completion of enrollment in the expanded Part B of the Phase 2 DeFianCe study of DKN-01 in patients with advanced colorectal cancer," said Douglas E. Onsi, President and Chief Executive Officer of Leap. "We look forward to sharing initial randomized controlled data from the DisTinGuish study and the DeFianCe study in the coming months. In addition, based on positive preclinical data, we are enthusiastically moving FL-501 into development. With a strong cash position that is expected to fund operations into Q2 2026, Leap is well positioned for continued success and long-term growth to deliver personalized medicines to patients fighting against cancer." DKN-01 Development Update Enrollment completed in the expanded randomized controlled Part B of the DeFianCe study evaluating DKN-01 in combination with standard of care bevacizumab and chemotherapy as a second-line treatment for patients with advanced CRC. Part B of the DeFianCe study (NCT05480306) is a Phase 2, randomized, controlled, open-label study of DKN-01 in combination with standard of care bevacizumab and chemotherapy in patients with advanced CRC who have received one prior systemic therapy. Part B of the study enrolled 188 patients. The Company expects to report initial data in mid-2025. Patient follow-up continuing in the randomized controlled Part C of the DisTinGuish study evaluating DKN-01 in combination with tislelizumab and chemotherapy in patients with GEJ and gastric cancer, with initial data expected in late 2024 or early 2025. Part C of the DisTinGuish study (NCT0436380) is a Phase 2, randomized, controlled, open-label study of DKN-01 in combination with tislelizumab and chemotherapy in first-line, HER-2 negative patients with GEJ and gastric cancer. Part C of the study enrolled 170 patients. The Company expects to report initial data in late 2024 or early 2025. Pipeline Update: Advancing FL-501 into development as a potential best-in-class anti-GDF-15 antibody with promising preclinical data. FL-501 is a potential best-in-class monoclonal antibody designed to neutralize GDF-15 to treat patients with cachexia and other GDF-15-driven diseases. FL-501 may also enhance the activity of the immune system in the tumor micro-environment. FL-501 was engineered for higher target affinity and a longer plasma half-life compared to competing therapies. In preclinical cachexia models, FL-501 increased body weight and restored muscle mass. Selected Third Quarter 2024 Financial Results Net Loss was $18.2 million for the third quarter 2024, compared to $13.7 million for the same period in 2023. The increase was primarily due to an increase in research and development expenses. Research and development expenses were $14.9 million for the third quarter 2024, compared to $11.5 million for the same period in 2023. The increase of $3.4 million was primarily due to an increase of $1.7 million in manufacturing costs related to clinical trial material and manufacturing campaigns, and an increase of $0.8 million in clinical trial costs due to patient enrollment, the duration of patients on study, the enhancement of correlative studies, increase in site activity associated with Part C of the DisTinGuish study, and the expansion of the size of Part B of the DeFianCe study. There was also an increase of $0.5 million in consulting fees associated with research and development activities and an increase of $0.4 million in payroll and other related expenses due to an increase in headcount of our research and development full-time employees. General and administrative expenses were $2.9 million for the third quarter 2024, compared to $3.3 million for the same period in 2023. The decrease of $0.4 million in general and administrative expenses during the three months ended September 30, 2024 as compared to the same period in 2023, was due to a $0.4 million decrease in professional fees. Cash and cash equivalents totaled $62.8 million at September 30, 2024. About Leap Therapeutics Leap Therapeutics (Nasdaq: LPTX) is focused on developing targeted and immuno-oncology therapeutics. Leap's most advanced clinical candidate, DKN-01, is a humanized monoclonal antibody targeting the Dickkopf-1 (DKK1) protein. DKN-01 is being developed in patients with esophagogastric, colorectal, and gynecological cancers. Leap's pipeline also includes FL-501, a humanized monoclonal antibody targeting the growth and differentiation factor 15 (GDF-15) protein, in preclinical development. For more information about Leap Therapeutics, visit or view our public filings with the SEC that are available via EDGAR at or via . FORWARD-LOOKING STATEMENTS This press release contains forward-looking statements within the meaning of the federal securities laws. Such statements are based upon current plans, estimates and expectations of the management of Leap that are subject to various risks and uncertainties that could cause actual results to differ materially from such statements. The inclusion of forward-looking statements should not be regarded as a representation that such plans, estimates and expectations will be achieved. Words such as "anticipate," "expect," "project," "intend," "believe," "may," "will," "should," "plan," "could," "continue," "target," "contemplate," "estimate," "forecast," "guidance," "predict," "possible," "potential," "pursue," "likely," and words and terms of similar substance used in connection with any discussion of future plans, actions or events identify forward-looking statements. All statements, other than historical facts, including statements regarding the potential safety, efficacy, and regulatory and clinical progress of Leap's product candidates; the anticipated timing for initiation or completion of clinical trials and release of clinical trial data and the expectations surrounding the outcomes thereof; Leap's future clinical or preclinical product development plans for any of Leap's product candidates; Leap's estimations of projected cash runway; and any assumptions underlying any of the foregoing, are forward-looking statements. Important factors that could cause actual results to differ materially from Leap's plans, estimates or expectations could include, but are not limited to: (i) Leap's ability to successfully execute its clinical trials and the timing of enrollment in and cost of such clinical trials; (ii) the results of Leap's clinical trials and pre-clinical studies; (iii) Leap's ability to successfully enter into new strategic partnerships for DKN-01 or any of its other programs and to maintain its ongoing collaborations with BeiGene and Adimab; (iv) whether any Leap clinical trials and products will receive approval from the U.S. Food and Drug Administration or equivalent foreign regulatory agencies; and (v) exposure to inflation, currency rate and interest rate fluctuations, as well as fluctuations in the market price of Leap's traded securities. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. Leap may not actually achieve the forecasts disclosed in such forward-looking statements, and you should not place undue reliance on such forward-looking statements. Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to those set forth under the caption "Risk Factors" in Leap's most recent Annual Report on Form 10-K filed with the SEC, as well as discussions of potential risks, uncertainties, and other important factors in its subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. Neither Leap, nor any of its affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. These forward-looking statements should not be relied upon as representing Leap's views as of any date subsequent to the date hereof. CONTACT: Douglas E. Onsi President & Chief Executive Officer Leap Therapeutics, Inc. 617-714-0360 [email protected] Matthew DeYoung Investor Relations Argot Partners 212-600-1902 [email protected] SOURCE Leap Therapeutics, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED