Selinexor

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

Preliminary efficacy analysis from the elacestrant plus everolimus and ribociclib cohorts of the ELEVATE study, along with updated safety data from additional cohorts of elacestrant plus targeted therapy combination arms, will be presented. These data highlight elacestrant’s potential role as an endocrine therapy backbone in combination with various targeted agents for patients with ER+/HER2- mBC. The robust elacestrant clinical development program across wide-ranging studies further solidifies its potential in monotherapy and combination settings, in mBC and in early breast cancer. FLORENCE, Italy and NEW YORK, May 22, 2025 (GLOBE NEWSWIRE) -- The Menarini Group (“Menarini”), a leading international pharmaceutical and diagnostics company, and Stemline Therapeutics, Inc. (“Stemline”), a wholly-owned subsidiary of the Menarini Group, focused on bringing transformational oncology treatments to cancer patients, will present updated preliminary efficacy and safety results from the Phase 1b/2 ELEVATE study in patients with estrogen receptor-positive (ER+), HER2-negative (HER2-) locally advanced or metastatic breast cancer (mBC). The ELEVATE study was designed to evaluate the safety and efficacy of oral-oral combination treatment options to overcome different resistance mechanisms observed in ER+/HER2- mBC and improve patient outcomes. Additionally, various other trial-in-progress updates will be presented, investigating elacestrant’s potential to become an endocrine therapy (ET) backbone across the spectrum of breast cancer. These data will be presented at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting. The ELEVATE study is comprised of six treatment regimens evaluating elacestrant in combination with CDK4/6 inhibitors (palbociclib, abemaciclib and ribociclib) and with inhibitors of the PI3K/AKT/mTOR pathway (everolimus, alpelisib and capivasertib). ELEVATE results reported at ASCO 2025 (abstract 1070/49) include updated efficacy data which demonstrate favorable preliminary progression-free survival (PFS) from the elacestrant plus ribociclib and the elacestrant plus everolimus cohorts. A recommended phase 2 dose (RP2D) was determined to be elacestrant 345 mg plus ribociclib 400 mg. The RP2D of elacestrant 345 mg plus everolimus 7.5 mg was previously reported. “It is encouraging to see the positive preliminary efficacy and safety results when everolimus and ribocilib, respectively, are combined with elacestrant. These findings are consistent with the promising elacestrant plus abemaciclib cohort data from the same study that was presented last December, which also demonstrated favorable preliminary efficacy and safety in this setting,” said Hope S. Rugo, MD, Director, Women's Cancers Program and Division Chief, Breast Medical Oncology, City of Hope Comprehensive Cancer Center. “As the progression-free survival data and safety data continue to mature across the various cohorts of the ELEVATE study, we are encouraged by elacestrant’s potential to become an endocrine therapy backbone in combination regimens for the treatment of metastatic breast cancer.” Additional data reported separately (abstract 1079/58) provided updated Phase 1b/2 safety results from four cohorts of the ELEVATE study, including elacestrant plus ribociclib, everolimus, alpelisib, and capivasertib. These updated preliminary results show that the combinations are consistent with the known safety profiles of each targeted therapy plus standard of care endocrine therapy. “These data continue to underscore the potential value of elacestrant as a combination partner in the ER+/HER2- metastatic breast cancer treatment landscape,” said Elcin Barker Ergun, CEO of the Menarini Group. “We are also exploring the potential of elacestrant in other patient populations, including our currently enrolling ELEGANT study, which is designed to assess its potential benefit in early breast cancer patients with high risk of recurrence.” In addition, the company will be presenting other data at the ASCO Annual Meeting. See below for a complete list of Menarini Stemline abstracts. Menarini Stemline Abstracts: Presentation Title: Elacestrant (Ela) combinations with ribociclib (Ribo) and everolimus (Eve) in patients (pts) with ER+/HER2- locally advanced or metastatic breast cancer (mBC): Update from ELEVATE, a phase (Ph) 1b/2, open-label, umbrella study. Abstract Number: 1070 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 49 Presenting Author: Hope S. Rugo Presentation Title: Elacestrant combinations in patients (pts) with ER+/HER2- locally advanced or metastatic breast cancer (mBC): Safety update from ELEVATE, a phase (Ph) 1b/2, open-label, umbrella study. Abstract Number: 1079 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 58 Presenting Author: Nancy Chan Presentation Title: ADELA: a double-blind, placebo-controlled, randomized phase 3 trial of Elacestrant (ELA) + everolimus (EVE) versus ELA + placebo (PBO) in ER+/HER2- advanced breast cancer (aBC) patients with ESR1-mutated tumors progressing on endocrine therapy (ET) + CDK4/6i. Abstract Number: TPS1129 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 103b Presenting Author: Antonio Llombart-Cussac Presentation Title: ELCIN: Elacestrant in women and men with CDK4/6 Inhibitor (CDK4/6i)-naïve estrogen receptor-positive (ER+), HER2-negative (HER2-) metastatic breast cancer (mBC): an open-label multicenter phase 2 study. Abstract Number: TPS1127 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 102b Presenting Author: Virginia G. Kaklamani Presentation Title: ELEGANT: Elacestrant versus standard endocrine therapy (ET) in women and men with node-positive, estrogen Receptor-positive (ER+), HER2-negative (HER2-), early breast cancer (eBC) with high risk of recurrence in a global, multicenter, randomized, open-label phase 3 study. Abstract Number: TPS619 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 210a Presenting Author: Aditya Bardia Presentation Title: EORTC-2129-BCG: Elacestrant for treating ER+/HER2- breast cancer patients with ctDNA relapse (TREAT ctDNA) Abstract Number: TPS620 Presentation Date & Time: Monday, June 2, 9:00 AM – 12:00 PM CT Location: Poster Bd 210b Presenting Author: Michail Ignatiadis About The Elacestrant Clinical Development Program Elacestrant is also being investigated in several company-sponsored clinical trials in metastatic breast cancer disease, alone or in combination with other therapies. ELEVATE ( NCT05563220 ) is a phase 1b/2 clinical trial evaluating the safety and efficacy of elacestrant combined with alpelisib, everolimus, capivasertib, palbociclib, ribociclib or abemaciclib. ELECTRA ( NCT05386108 ) is an open-label phase 1b/2, multicenter study evaluating elacestrant in combination with abemaciclib in patients with ER+, HER2- breast cancer. The phase 2 portion evaluates this treatment regimen in patients with brain metastases. ELCIN ( NCT05596409 ) is a phase 2 trial evaluating the efficacy of elacestrant in patients with ER+, HER2- advanced/metastatic breast cancer who received one or two prior hormonal therapies and no prior CDK4/6 inhibitors in the metastatic setting. ADELA ( NCT06382948 ) is a phase 3 randomized, double-blinded trial evaluating elacestrant in combination with everolimus in patients with ER+, HER2- mBC with ESR1-mut tumors. Elacestrant is also being evaluated in additional investigator-led trials, in trials conducted in collaboration with other companies, in metastatic breast cancer as well as in early disease. About ORSERDU (elacestrant) U.S. Indication: ORSERDU (elacestrant), 345 mg tablets, is indicated for the treatment of postmenopausal women or adult men with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative, ESR1 -mutated advanced or metastatic breast cancer with disease progression following at least one line of endocrine therapy. Full prescribing information for the U.S. can be found at www.orserdu.com . Important Safety Information Warning and Precautions Dyslipidemia : Hypercholesterolemia and hypertriglyceridemia occurred in patients taking ORSERDU at an incidence of 30% and 27%, respectively. The incidence of Grade 3 and 4 hypercholesterolemia and hypertriglyceridemia were 0.9% and 2.2%, respectively. Monitor lipid profile prior to starting and periodically while taking ORSERDU. Embryo-Fetal Toxicity : Based on findings in animals and its mechanism of action, ORSERDU can cause fetal harm when administered to a pregnant woman. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the last dose. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the final dose. Adverse Reactions Serious adverse reactions occurred in 12% of patients who received ORSERDU. Serious adverse reactions in >1% of patients who received ORSERDU were musculoskeletal pain (1.7%) and nausea (1.3%). Fatal adverse reactions occurred in 1.7% of patients who received ORSERDU, including cardiac arrest, septic shock, diverticulitis, and unknown cause (one patient each). The most common adverse reactions ( > 10%) , including laboratory abnormalities, of ORSERDU were musculoskeletal pain (41%), nausea (35%), increased cholesterol (30%), increased AST (29%), increased triglycerides (27%), fatigue (26%), decreased hemoglobin (26%), vomiting (19%), increased ALT (17%), decreased sodium (16%), increased creatinine (16%), decreased appetite(15%), diarrhea (13%), headache (12%), constipation (12%), abdominal pain (11%), hot flush (11%), and dyspepsia (10%). Drug interactions Concomitant use with CYP3A4 Inducers and/or inhibitors : Avoid concomitant use of strong or moderate CYP3A4 inhibitors with ORSERDU. Avoid concomitant use of strong or moderate CYP3A4 inducers with ORSERDU. Use in specific populations Lactation : Advise lactating women to not breastfeed during treatment with ORSERDU and for 1 week after the last dose. Hepatic Impairment : Avoid use of ORSERDU in patients with severe hepatic impairment (Child-Pugh C). Reduce the dose of ORSERDU in patients with moderate hepatic impairment (Child-Pugh B). The safety and effectiveness of ORSERDU in pediatric patients have not been established. To report SUSPECTED ADVERSE REACTIONS, contact Stemline Therapeutics, Inc. at 1-877-332-7961 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . About The Menarini Group The Menarini Group is a leading international pharmaceutical and diagnostics company, with a turnover of $4.7 billion and over 17,000 employees. Menarini is focused on therapeutic areas with high unmet needs with products for cardiology, oncology, pneumology, gastroenterology, infectious diseases, diabetology, inflammation, and analgesia. With 18 production sites and 9 Research and Development centers, Menarini’s products are available in 140 countries worldwide. For further information, please visit www.menarini.com . About Stemline Therapeutics Inc. Stemline Therapeutics, Inc. (“Stemline”), a wholly-owned subsidiary of the Menarini Group, is a commercial-stage biopharmaceutical company focused on bringing transformational oncology treatments to patients. Stemline commercializes elacestrant, an oral endocrine therapy indicated for the treatment of postmenopausal women or adult men with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative, ESR1 -mutated advanced or metastatic breast cancer with disease progression following at least one line of endocrine therapy, in the U.S., Europe, and other global regions. Stemline also commercializes tagraxofusp-erzs, a novel targeted therapy directed to CD123, for patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN), an aggressive hematologic cancer, in the United States, Europe, and other global regions. In addition, Stemline commercializes selinexor, an XPO1 inhibitor for multiple myeloma, in Europe. The company is also conducting multiple label-expansion studies with elacestrant and tagraxofusp in breast and hematologic cancer indications, respectively, and has an extensive clinical pipeline of additional drug candidates in various stages of development for a host of solid and hematologic cancers. Media Contacts The Menarini Group Valeria Speroni Cardi Email: pressoffice@menarini.com Stemline Therapeutics, Inc. Cheya Pope Email: media@menarinistemline.com Legal Disclaimer: EIN Presswire provides this news content "as is" without warranty of any kind. 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