Docetaxel

近日，正大天晴自主研发的双特异性抗体偶联药物（ADC）注射用TQB2102被国家药监局药品审评中心（CDE）拟纳入突破性治疗品种，拟用于 HER2 阳性早期或局部晚期乳腺癌患者的新辅助治疗。此前，公司于2025年美国临床肿瘤学会（ASCO）年会上披露了TQB2102的三项研究数据，其中，新辅助治疗HER2阳性乳腺癌的II期研究结果显示，单药8周期组总病理完全缓解（tpCR）率达73.1%，6mg/kg剂量组tpCR率达76.9%，显著优于当前化疗联合双靶标准疗法（56%-66%）及同类ADC药物历史数据[1]，为这类患者带来新的诊疗选择。HER2阳性乳腺癌面临诊疗困境乳腺癌是全球女性最常见的恶性肿瘤，2022年中国乳腺癌新发病例数约为35.7万例，死亡病例数约为7.5万例，严重危害女性健康。HER2 阳性乳腺癌约占所有乳腺癌病例的15%-20%[2]，因侵袭性强、易复发转移备受关注。目前，针对原发灶大于2cm或淋巴结阳性患者，标准新辅助方案为含紫杉类化疗联合曲帕双靶治疗。尽管TCbHP（多西他赛+卡铂+曲妥珠单抗+帕妥珠单抗）6周期方案将病理完全缓解（pCR）率提升至约56%-66%[3-5]，但仍有约40%的患者未达到pCR，术后复发风险较高。此外，患者还需承受四药联合带来的毒性叠加。临床亟需能够突破当下临床获益、降低系统毒性的创新疗法。TQB2102刷新全球tpCR记录TQB2102采用双表位设计（靶向HER2的ECD2和ECD4表位），通过同时结合HER2阳性肿瘤细胞表面的ECD2、ECD4，增强药物内化效率，提升对肿瘤细胞的杀伤作用。这种设计避免了传统单抗或单靶ADC的局限性，尤其在HER2低表达肿瘤治疗中更具优势。此前，公司在2025年ASCO年会上公布的TQB2102-Ⅱ-01研究结果显示：● 8周期治疗组整体的总病理完全缓解（tpCR）率达73.1%，其中6mg/kg队列达76.9% ，7.5mg/kg队列达69.2%。● 6周期治疗组整体的tpCR率为59.6%，其中6mg/kg队列达57.7%，7.5mg/kg队列达61.5%。● HR阳性受试者中，6.0mg/kg 6周期队列、7.5mg/kg 6周期队列、6.0mg/kg 8周期队列、7.5mg/kg 8周期队列的tpCR率分别为53.8%、35.7%、58.3%和61.5%。● HR阴性受试者中，6.0mg/kg 6周期队列、7.5mg/kg 6周期队列、6.0mg/kg 8周期队列、7.5mg/kg 8周期队列的tpCR率分别为61.5%、91.7%、92.9%和76.9%。● 安全性方面，3级及以上治疗相关的不良事件（TRAE）发生率为27.9%，间质性肺炎总体发生率为0.96%。上述结果提示，TQB2102在HER2阳性乳腺癌新辅助治疗中有良好的短期治疗获益和安全性。基于该研究的突破性成果，监管部门已同意开展TQB2102新辅助治疗HER2阳性乳腺癌的Ⅲ期注册性临床研究，将在更大规模的临床研究中验证TQB2102对比TCbHP四药化疗方案的优效性。截至目前，TQB2102共登记开展9项临床研究，包括乳腺癌、结直肠癌、肺癌、胆管癌、胃癌/胃食管交界部癌等。除HER2阳性晚期乳腺癌研究外，HER2低表达乳腺癌也已进入Ⅲ期临床研究。此次TQB2102 拟纳入突破性治疗品种，有望重塑HER2阳性乳腺癌的疾病治疗格局。正大天晴始终将科技创新作为企业可持续发展的支撑力量，立足广泛瘤种治疗领域，已形成以安罗替尼为核心的优势产品矩阵。未来，公司将继续加大创新力度，助力中国生物医药产业高质量发展。参考文献：[1]Junjie Li, Qingyuan Zhang, Xiaohua Zeng, et al. Efficacy and safety of neoadjuvant TQB2102 in women with locally advanced or early HER2-positive breast cancer: A randomized, open-label, multi-centre phase 2 trial.2025 ASCO（#591）.[2]Loibl S, Gianni L. HER2-positive breast cancer. Lancet. 2017;389(10087):2415-2429.[3]Hurvitz SA, Martin M, Symmans WF, et al. Neoadjuvant trastuzumab, pertuzumab, and chemotherapy versus trastuzumab emtansine plus pertuzumab in patients with HER2-positive breast cancer (KRISTINE): a randomised, open-label, multicentre, phase 3 trial. Lancet Oncol. 2018 Jan;19(1):115-126.[4]Chen XC, Jiao DC, Qiao JH, et al. De-escalated neoadjuvant weekly nab-paclitaxel with trastuzumab and pertuzumab versus docetaxel, carboplatin, trastuzumab, and pertuzumab in patients with HER2-positive early breast cancer (HELEN-006): a multicentre, randomised, phase 3 trial. Lancet Oncol. 2025 Jan;26(1):27-36.[5]Schneeweiss A, Chia S, Hickish T, et al. Pertuzumab plus trastuzumab in combination with standard neoadjuvant anthracycline-containing and anthracycline-free chemotherapy regimens in patients with HER2-positive early breast cancer: a randomized phase II cardiac safety study (TRYPHAENA). Ann Oncol. 2013 Sep;24(9):2278-84.▲ 上下滑动查看更多声明：1.新闻稿旨在促进医药信息的沟通和交流，仅供医疗卫生专业人士参阅，非广告用途。2.本公司不对任何药品和/或适应症作推荐。3.本新闻稿中涉及的信息仅供参考，不能以任何方式取代专业的医疗指导，也不应被视为诊疗建议。若您想了解具体疾病诊疗信息，请遵从医生或其他医疗卫生专业人士的意见或指导。● 出席夏季达沃斯论坛 谢承润：深化全产业协同创新 推动生物医药跃迁升级● 谢承润出席夏季达沃斯论坛 倡言以AI驱动与创新融合推动新药研发驶入快车道● 第9位！中国医药工业百强榜权威发布 正大天晴首次挺进前10● 1类创新药库莫西利胶囊新适应症获受理，晚期乳腺癌一线治疗再添利器

In eight tumors where patients failed immune checkpoint inhibitor (ICI) treatment, Plinabulin + radiation + PD-1 inhibitors demonstrated an overall response rate (ORR) of 23% and a disease control rate (DCR) of 54% in non-irradiated lesions. Biomarker analysis linked Plinabulin’s mechanism to GEF-H1–dependent dendritic cell maturation, offering the potential to pre-select patients at baseline and predict clinical response. July 07, 2025 -- BeyondSpring Inc. (NASDAQ: BYSI) today announced publication of a human clinical study in Med (Cell Press) demonstrating that Plinabulin, when combined with radiation and a checkpoint inhibitor, induces dendritic cell (DC) maturation and elicits tumor responses in patients across multiple cancer types who had failed prior ICI therapy. The study also identified a potential biomarker—baseline GEF-H1 immune signature—that may enable patient pre-selection and clinical response prediction. “These results offer early but important signals that Plinabulin’s dendritic cell maturation mechanism could play a pivotal role in reversing ICI-acquired resistance,” said Dr. Steven Lin, M.D., Ph.D., corresponding author and Professor of Radiation Oncology at The University of Texas MD Anderson Cancer Center. “The ability of Plinabulin to activate the immune system in this setting is both scientifically intriguing and clinically promising—particularly given the durability of responses in some heavily pretreated patients.” Dr. Lin added, “It is especially noteworthy that Plinabulin combination demonstrated the best responses in non-small cell lung cancer, head and neck squamous cell carcinoma, and Hodgkin lymphoma.” “This study builds upon the seminal work of Nobel Laureate Dr. Ralph Steinman and Dr. Ira Mellman, who helped define the essential role of dendritic cells in immune activation,” said Lan Huang, Ph.D., Co-Founder, Chairman, and CEO of BeyondSpring. “Plinabulin’s ability to drive dendritic cell maturation and induce immune responsiveness offers a potential breakthrough strategy for patients who are refractory or relapsed on checkpoint inhibitors. We are committed to advancing Plinabulin’s development in partnership with pioneering cancer research institutions like MD Anderson.” This investigator-initiated, Phase 1 translational trial (NCT04902040) evaluated a triple immunotherapy approach combining Plinabulin, radiation (RT), and anti-PD-1 checkpoint inhibitors in patients with eight cancer types who are refractory or relapsed on prior ICI therapy. RT was administered only during the first cycle. The primary endpoint was tumor response in non-irradiated lesions. Lin S.H., Subbiah V., Cohen E.N. et al. “Plinabulin following radiation enhances dendritic cell maturation and checkpoint inhibitor retreatment of relapsed/refractory cancers.” Med. Published June 27, 2025. This open-label, single-arm Phase 1 basket study (NCT04902040) at MD Anderson Cancer Center investigates safety and efficacy of Plinabulin plus radiation and PD-1 inhibitor in patients refractory or relapsed after prior immunotherapy. The primary endpoint is investigator-assessed ORR (RECIST 1.1) in non-irradiated lesions; secondary endpoints include DCR. – Radiation (Cycle 1 and optional Cycle 2): Local consolidative RT (8 Gy × 3; 12.5 Gy × 4; or 4 Gy × 5) on Day 1. Optional sequential RT in Cycle 2 at investigator discretion. – Plinabulin: 30 mg/m² on Days 1 and 4 of Cycle 1 (3–6 hours post-RT); Day 1 of Cycle 2 onward; Additional Day 4 in Cycle 2 if RT is given in Cycle 2. – PD-1 inhibitor: Pembrolizumab 200 mg on Day 1 every 21 days or nivolumab 240 mg on Day 1 every 14 days × 2 doses per cycle. Plinabulin is a first-in-class dendritic cell maturation agent that binds reversibly to a unique site on tubulin, destabilizing microtubules in a controlled manner to release GEF-H1 (Chem 2019; Cell Reports 2019). Immune protein GEF-H1 activates the RhoA/ROCK signaling pathway, promoting dendritic cell maturation and anti-tumor T-cell immunity. This mechanism is distinct from traditional tubulin agents and does not interfere with tubulin stabilizers like docetaxel. Across multiple clinical studies and approximately 800 patients, Plinabulin has shown durable anti-cancer activity and a favorable safety profile, and has significantly reduced chemotherapy-induced neutropenia, potentially enhancing docetaxel tolerability. – In the Dublin-3 Phase 3 second and third line (2/3L) NSCLC, EGFR wild-type trial (n=559), Plinabulin + docetaxel demonstrated a significant overall survival benefit over standard-of-care docetaxel (Lancet Respiratory Medicine 2024 - Press Release Link). – In a Phase 2 study of Plinabulin + pembrolizumab + docetaxel in 2/3L NSCLC who progressed on PD-1/L1 inhibitors (n=47), median PFS was 6.8 months, and 15-month OS rate was 78% (ASCO 2025 - Press Release Link). BeyondSpring (NASDAQ: BYSI) is a clinical-stage biopharmaceutical company developing first-in-class therapies for high unmet medical needs. Its lead asset, Plinabulin, is in late-stage clinical development as an anti-cancer agent in NSCLC and a range of cancer indications. Plinabulin’s novel mechanism of action as a dendritic cell maturation agent supports both anti-cancer activity and immune modulation, offering a unique approach to resensitizing tumors to prior failure or progression to checkpoint inhibitors. In addition, BeyondSpring is the founding equity holder of SEED Therapeutics, a biotechnology company pioneering targeted protein degradation (TPD) through the discovery of novel molecular glues and bifunctional degraders. Powered by its proprietary RITE3™ platform, SEED is advancing a pipeline of first-in-class degraders to address traditionally undruggable targets across oncology, neurodegeneration, immunology, and virology. SEED’s strategic collaborations with Eli Lilly and Company and Eisai Co., Ltd. support its mission to develop transformational therapies. Learn more at beyondspringpharma.com. 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