Toripalimab

ATG-037, an oral small molecule CD73 inhibitor, in combination with MSD's anti-PD-1 therapy, KEYTRUDA® (pembrolizumab), achieved an overall response rate (ORR) of 36.4% and disease control rate (DCR) of 100% in checkpoint inhibitor (CPI)-resistant melanoma patients in the ongoing STAMINA-01 trial, with one patient maintaining a partial response (PR) and remained on treatment for over 2 years without any safety concerns. In CPI-resistant non-small cell lung cancer (NSCLC), the combination of ATG-037 and pembrolizumab achieved an ORR of 22% and DCR of 67% in the same study. ATG-008, an oral dual mTORC1/2 inhibitor, in combination with toripalimab, achieved an ORR of 22.2% and DCR of 85.2% in CPI-resistant cervical cancer patients in the ongoing TORCH-2 trial. SHANGHAI and HONG KONG, May 22, 2025 /PRNewswire/ -- Antengene Corporation Limited (" Antengene", SEHK: 6996.HK), a leading innovative, commercial-stage global biopharmaceutical company dedicated to discovering, developing and commercializing first-in-class and/or best-in-class medicines for hematologic malignancies and solid tumors, today announced that it will present the latest clinical data of its CD73 oral small molecule inhibitor ATG-037 and oral dual mTORC1/2 inhibitor ATG-008 in Poster Presentations at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting, taking place from May 30th to June 3rd in Chicago, IL, the United States. Details of the Poster Presentations: ATG-037 (CD73 Small Molecule Inhibitor) Title: A First-In-Human Phase I/Ib study of ATG-037 Monotherapy and Combination Therapy with Pembrolizumab in Patients with Advanced Solid Tumors - STAMINA-01 Abstract: 3123 Session: Developmental Therapeutics—Molecularly Targeted Agents and Tumor Biology Date: June 2, 2025 Time: 1:30 PM - 4:30 PM (Central Time) 2:30 AM - 5:30 AM, June 3, 2025 (Beijing Time) Robust clinical benefit observed in CPI-resistant patients: As of April 27, 2025, the study has already completed the dose escalation part in which 43 patients were enrolled and received monotherapy. Among them, 28 CPI-resistant patients also received the combination therapy. Among patients treated with the combination therapy, 6 patients (4 melanoma and 2 NSCLC patients) achieved a confirmed PR with an ORR of 21.4%, and 16 patients achieved stable disease (SD) with a DCR of 78.6%. The combination regimen delivered particularly encouraging efficacy in melanoma, with all 11 CPI-resistant patients achieving disease control (DCR 100%) and an ORR of 36.4% (4 PRs), including 1 patient having maintained PR and remained in the study for over 2 years without any safety concerns. In CPI-resistant NSCLC, the combination regimen achieved an ORR of 22% (PRs) and a DCR of 67%. These results highlight the potential of ATG-037 to deliver meaningful clinical benefit across multiple tumor types, reinforcing its promise as a novel treatment option in CPI-resistant cancers. Manageable safety profile: Treatment-related adverse events were reported in 56% (24/43) of patients receiving monotherapy and 61% (17/28) of patients receiving the combination therapy. The majority of these TRAEs were grade 1-2. Only one serious TRAE (grade 3 immune mediated hepatitis) was observed in the study. Two key differentiators: ATG-037 is an oral small molecule CD73 inhibitor offering greater convenience over intravenous (IV) injectable agents and is uniquely designed to overcome the 'hook effect' commonly seen in anti-CD73 antibodies, enabling complete and more effective CD73 inhibition. The STAMINA-01 trial: STAMINA-01 is a Phase I/Ib study jointly conducted by Antengene and MSD (Merck & Co., Inc., Rahway, NJ, USA). The study was designed to evaluate the safety, pharmacokinetics, and optimal dosing of ATG-037 as a monotherapy and in combination with MSD's anti-PD-1 therapy, KEYTRUDA® (pembrolizumab), in patients with refractory/relapsed solid tumors. At present, dose optimization and dose expansion parts of the study are being carried out as planned in China and Australia. KEYTRUDA® is a registered trademark of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA. ATG-008 (mTORC1/2 Small Molecule Inhibitor) Title: A TORC1/2 inhibitor onatasertib combined with toripalimab in patients with advanced cervical cancers with prior anti-PD-(L)1 therapy Abstract: 5540 Session: Gynecologic Cancer Date: June 1, 2025 Time: 9:00 AM - 12:00 PM (Central Time) 10:00 PM, June 1, 2025 - 1:00 AM, June 2, 2025 (Beijing Time) The TORCH-2 trial: ATG-008 is an oral dual mTOR1/2 inhibitor. The TORCH-2 trial is a Phase I/II dose escalation and dose expansion study of ATG-008 in combination with the anti-PD-1 monoclonal antibody toripalimab in patients with advanced solid tumors. This abstract reports data from patients with advanced cervical cancer who had previously received at least prior 1 line of anti-PD-(L)1 therapy and 1 line of platinum chemotherapy, regardless of the PD-L1 expression. As of November 25, 2024, 30 qualified patients were enrolled and received ATG-008 15 mg orally once a day (QD) in combination with toripalimab 240 mg, once every 21 days (Q3W). Among them, 14 and 16 patients had received 1 and at least 2 prior lines of systemic therapy, respectively. The median time since initial diagnosis was 37 months. Encouraging efficacy in patients with CPI-resistant cervical cancer: Among 27 efficacy-evaluable patients, the combination regimen achieved an ORR of 22.2% and a DCR of 85.2%. The ORRs of PD-L1 positive and PD-L1 negative populations were 30% (3/10) and 33.3% (2/6), respectively. The median time to response was 1.7 months (1.4, 4.2) and the median duration of response (DOR) was 5.7 months (95% CI: 2.7, NE). The median progression-free survival (PFS) was 4.2 months (95% CI: 3.3, 5.8) and the median overall survival (OS) was 21.4 months (95% CI: 15.5, NE). These results underscore the potential of ATG-008 in combination with toripalimab in providing meaningful clinical benefit for CPI-resistant cervical cancer patients, reinforcing its promise as a novel treatment option for this difficult-to-treat patient population. Manageable safety profile: All 30 patients experienced at least one TEAE, and 22 patients (73.3%) reported grade ≥3 TRAEs. The most common all-grade TRAEs were hyperglycaemia (56.7%), rash (43.3%) and white blood cell decreased (43.3%). Most TRAEs were grade 1-2, and no TEAE led to death. About Antengene Antengene Corporation Limited ( "Antengene", SEHK: 6996.HK) is a leading commercial-stage R&D-driven global biopharmaceutical company focused on the discovery, development, manufacturing and commercialization of innovative first-in-class/best-in-class therapeutics for the treatment of hematologic malignancies and solid tumors, in realizing its vision of "Treating Patients Beyond Borders". Antengene has built a pipeline of 9 oncology assets at various stages going from clinical to commercial, including 6 with global rights, and 3 with rights for the APAC region. To date, Antengene has obtained 31 investigational new drug (IND) approvals in the U.S. and Asia, and submitted new drug applications (NDAs) in 11 Asia Pacific markets, with the NDA for XPOVIO® (selinexor) already approved in Mainland of China, Taiwan China, Hong Kong China, Macau China, South Korea, Singapore, Malaysia, Thailand, Indonesia and Australia. Forward-looking statements The forward-looking statements made in this article relate only to the events or information as of the date on which the statements are made in this article. Except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise, after the date on which the statements are made or to reflect the occurrence of unanticipated events. You should read this article completely and with the understanding that our actual future results or performance may be materially different from what we expect. In this article, statements of, or references to, our intentions or those of any of our Directors or our Company are made as of the date of this article. Any of these intentions may alter in light of future development. For a further discussion of these and other factors that could cause future results to differ materially from any forward-looking statement, please see the other risks and uncertainties described in the Company's Annual Report for the year ended December 31, 2024, and the documents subsequently submitted to the Hong Kong Stock Exchange. For more information, please contact: Investor Contacts: Donald Lung E-mail: [email protected] Mobile: +86 18420672158 PR Contacts: Peter Qian E-mail: [email protected] Mobile: +86 13062747000 SOURCE Antengene Corporation Limited WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

ROCKVILLE, Md. and SUZHOU, China, May 22, 2025 (GLOBE NEWSWIRE) -- Ascentage Pharma (NASDAQ: AAPG; HKEX: 6855), a global biopharmaceutical company dedicated to addressing unmet medical needs in cancers, today announced that new clinical data from two ongoing investigational studies evaluating lisaftoclax in various blood cancers and alrizomadlin in solid tumors will be presented during an oral presentation and poster presentation, respectively, at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting, taking place May 30 - June 3 in Chicago, Ill., USA. Both lisaftoclax and alrizomadlin demonstrated antitumor activity, and the data support their further clinical development. The Bcl-2 inhibitor lisaftoclax and the MDM2-p53 inhibitor alrizomadlin are both key drug candidates in Ascentage Pharma’s apoptosis-targeted pipeline. The oral report on lisaftoclax will feature results from a Phase 1b/2 study evaluating lisaftoclax in combination with azacitidine in patients with treatment-naïve (TN) or prior venetoclax-exposed myeloid malignancies. Data from this global, multicenter study that has enrolled nearly one hundred patients show that lisaftoclax in combination with azacitidine was well tolerated with preliminary efficacy. Moreover, this study released the first dataset of lisaftoclax in patients with venetoclax-refractory acute myeloid leukemia (AML) or myelodysplastic syndromes (MDS), and it also demonstrated promising therapeutic potential. Dr. Yifan Zhai, Chief Medical Officer of Ascentage Pharma, commented: “We are pleased that results from the ongoing Phase 1b/2 study of lisaftoclax will be featured in an oral presentation at the 2025 ASCO Annual Meeting, which will highlight how lisaftoclax demonstrated significant activity when combined with azacitidine in patients with various myeloid malignancies. This novel Bcl-2 inhibitor has shown antitumor activity in both previously untreated patients and those who were treated with venetoclax, addressing a critical treatment gap for these difficult-to-treat conditions. The recent new drug application submission for lisaftoclax in China was a milestone for our program, and, if approved, lisaftoclax would become the second Bcl-2 inhibitor to be approved anywhere in the world. We are grateful to the patients who participated in these trials and the investigators for sharing our commitment to developing innovative therapies that can make a meaningful difference for patients with cancer who have limited options.” Highlights of the two abstracts selected for presentations at ASCO 2025 are as follows: Phase 1b/2 Study of Lisaftoclax (APG-2575) Combined with Azacitidine (AZA) in Patients with Treatment-Naïve or Prior Venetoclax-Exposed Myeloid Malignancies Abstract #: 6505 Format: Oral Presentation Session Title: Hematologic Malignancies—Leukemia, Myelodysplastic Syndromes, and Allotransplant Date and Time: Monday, June 2, 2025, 3:00 PM-6:00 PM, Central Time (Tuesday, June 3, 2025, 4:00 AM-7:00 AM, Beijing Time) Principal Authors: Michael Francis Leahy, MBChB, Royal Perth Hospital, Australia; Shaun Fleming, MBBS(Hons), PhD, The Alfred Hospital & Australian Centre for Blood Diseases, Australia; Patricia Kropf, MD, Novant Health Cancer Institute, United States, et al. Highlights: The Phase 1b/2 study was designed to evaluate the safety and efficacy of lisaftoclax in combination with azacitidine in patients with treatment-naïve (TN) or relapsed/refractory (R/R) acute myeloid leukemia (AML)/mixed phenotype acute leukemia (MPAL) or high-risk myelodysplastic syndromes (HR-MDS)/chronic myelomonocytic leukemia (CMML). Lisaftoclax is a novel investigational oral selective Bcl-2 inhibitor that has shown enhanced treatment response when combined with azacitidine in prior preclinical and clinical studies. The combination of lisaftoclax and azacitidine was well tolerated, with initial signals of clinical activity. As of the data cutoff date of January 6, 2025, 97 patients were enrolled, with a median treatment duration of two cycles. In patients with TN-MDS/CMML, the overall response rate (ORR) was 64%, with complete response (CR) and marrow CR achieved by 29% and 36% of patients, respectively; in patients with R/R AML treated with lisaftoclax for 28 days or 14 days of repeated 28-day cycles, the ORRs were 39% and 50%, respectively, including CR rates of 28% and 37.5%, respectively; in patients with diseases refractory to venetoclax, the ORR was 17% in patients with AML/MPAL and 50% in patients with HR-MDS. The maximum tolerated dose (MTD) was not reached, and no dose-limiting toxicities (DLTs) were observed. Common grade 3/4 treatment-emergent adverse events (TEAEs) included neutropenia (40%), febrile neutropenia (31%), and thrombocytopenia (22%). Febrile neutropenia was the most commonly reported serious adverse event (SAE) (26.8%). Only 3% of participants experienced neutropenia that led to a dose reduction of lisaftoclax. There was no reported 60-day mortality. A Phase 2 Study of Novel MDM2 Inhibitor Alrizomadlin (APG-115) with or without Toripalimab in Patients with Advanced Adenoid Cystic Carcinoma (ACC) or Other Solid Tumors Abstract #: 6102 Format: Poster Presentation Session Title: Head and Neck Cancer Date and Time: Monday, June 2, 2025, 9:00 AM-12:00 PM, Central Time (Monday June 2, 2025, 10:00 PM – 1:00 AM the next day, Beijing Time) Principal Authors: Ye Guo, MD, Department of Medical Oncology, Shanghai East Hospital, China; Ning Li, MD, Chinese Academy of Medical Sciences Cancer Hospital, China; Xing Zhang, MD, Melanoma and Sarcoma Medical Oncology Unit, Sun Yat-sen University Cancer Center, China; Meiyu Fang, MD, Department of Rare Cancer & Head and Neck Medical Oncology, Cancer Hospital of the University of Chinese Academy of Sciences, China; Shuhang Wang, MD, Chinese Academy of Medical Sciences Cancer Hospital, China, et al. Highlights: Alrizomadlin is a novel investigational oral MDM2 inhibitor that has shown a manageable safety profile with initial clinical activity in ACC. As of the data cutoff date of January 5, 2025, 54 patients with advanced ACC, malignant peripheral nerve sheath tumor (MPNST), liposarcoma (LPS), biliary-tract cancer (BTC) and other tumors were enrolled. Alrizomadlin monotherapy showed antitumor activity in patients with advanced ACC or MPNST. Alrizomadlin in combination with toripalimab was also well tolerated and demonstrated antitumor activity in patients with MPNST, BTC and LPS. In the monotherapy arm, 14 patients were efficacy-evaluable. The ORR was 22.2% and the disease control rate (DCR) was 100% in 9 patients with ACC. The DCR was 100% in all patients with MPNST, all 5 of whom achieved stable disease (SD). Grade 3 or higher treatment-related adverse events (TRAEs) included neutropenia (13.6%) and thrombocytopenia (9.1%). No treatment-related SAEs were reported. In the combination arm, 28 patients were efficacy-evaluable. The ORR was 20% and DCR was 80% in 5 patients with BTC. The ORR was 16.7% and DCR was 66.7% in 6 patients with LPS. The ORR was 14.3% and DCR was 53.6% in patients with MPNST; furthermore, 2 patients with MPNST had confirmed partial responses (PR) with prolonged progression free survival (PFS) of 60+ weeks and 96+ weeks, respectively. Grade 3 or higher TRAEs included thrombocytopenia (38.5%) and neutropenia (34.6%). Treatment-related SAEs were reported in 8 patients, with thrombocytopenia being the most common (n=6). One patient discontinued treatment because of grade 4 thrombocytopenia. No treatment-related deaths were reported. * Lisaftoclax (APG-2575) and alrizomadlin (APG-115) are investigational compounds and have not been approved by the U.S. FDA. About Ascentage Pharma Ascentage Pharma (NASDAQ: AAPG; HKEX: 6855) is a global biopharmaceutical company dedicated to addressing unmet medical needs in cancers. The company has built a rich pipeline of innovative drug candidates that includes inhibitors targeting key proteins in the apoptotic pathway, such as Bcl-2 and MDM2-p53 and next-generation kinase inhibitors. The lead asset, olverembatinib, is the first third generation BCR-ABL1 inhibitor approved in China for the treatment of patients with CML in chronic phase (CML-CP) with T315I mutations, CML in accelerated phase (CML-AP) with T315I mutations, and CML-CP that is resistant or intolerant to first and second-generation TKIs. It is covered by the China National Reimbursement Drug List (NRDL). The Company is currently conducting an FDA-cleared, global registrational Phase 3 trial, or POLARIS-2, of olverembatinib for CML, as well as global registrational Phase 3 trials for newly diagnosed Ph+ ALL patients and SDH-deficient GIST patients. The second lead asset, lisaftoclax, is a novel Bcl-2 inhibitor for the treatment of various hematological malignancies. The NDA for the treatment of relapsed and/or refractory CLL and SLL was accepted with Priority Review designation by China’s National Medical Products Administration. The Company is currently conducting an FDA-cleared, global registrational Phase 3 trial, or GLORA, of lisaftoclax in combination with BTK inhibitors for patients with CLL/SLL previously treated with BTK inhibitors for more than 12 months with sub-optimal response, as well as global registrational Phase 3 trials for newly diagnosed CLL/SLL, AML and MDS patients. Leveraging its robust R&D capabilities, Ascentage Pharma has built a portfolio of global intellectual property rights and entered into global partnerships and other relationships with numerous leading biotechnology and pharmaceutical companies, such as Takeda, AstraZeneca, Merck, Pfizer and Innovent, in addition to research and development relationships with leading research institutions, such as Dana-Farber Cancer Institute, Mayo Clinic, National Cancer Institute and the University of Michigan. For more information, visit https://ascentage.com/ Forward-Looking Statements This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical facts, contained in this press release may be forward-looking statements, including statements that express Ascentage Pharma’s opinions, expectations, beliefs, plans, objectives, assumptions or projections regarding future events or future results of operations or financial condition. These forward-looking statements are subject to a number of risks and uncertainties as discussed in Ascentage Pharma’s filings with the SEC, including those set forth in the sections titled “Risk factors” and “Special note regarding forward-looking statements and industry data” in its Registration Statement on Form F-1, as amended, filed with the SEC on January 21, 2025, and the Form 20-F filed with the SEC on April 16, 2025, the sections headed “Forward-looking Statements” and “Risk Factors” in the prospectus of the Company for its Hong Kong initial public offering dated October 16, 2019, and other filings with the SEC and/or The Stock Exchange of Hong Kong Limited we made or make from time to time that may cause actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. The forward-looking statements contained in this presentation do not constitute profit forecast by the Company’s management. As a result of these factors, you should not rely on these forward-looking statements as predictions of future events. The forward-looking statements contained in this press release are based on Ascentage Pharma’s current expectations and beliefs concerning future developments and their potential effects and speak only as of the date of such statements. Ascentage Pharma does not undertake any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Contacts Investor Relations: Hogan Wan, Head of IR and Strategy Ascentage Pharma Hogan.Wan@ascentage.com +86 512 85557777 Stephanie Carrington ICR Healthcare Stephanie.Carrington@icrhealthcare.com +1 (646) 277-1282 Media Relations: Sean Leous ICR Healthcare Sean.Leous@icrhealthcare.com +1 (646) 866-4012 Legal Disclaimer: EIN Presswire provides this news content "as is" without warranty of any kind. We do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.