2025年4月9日,复宏汉霖(2696.HK)宣布,公司基于与宜联生物的合作开发的靶向程序性死亡-配体1(PD-L1)的新型抗体偶联药物(ADC)注射用HLX43联合自研的H药 汉斯状®(抗PD-1人源化单克隆抗体注射液,通用名:斯鲁利单抗注射液)用于治疗晚期/转移性实体瘤患者的Ib/II期临床试验(HLX43HLX10-ST201)于中国完成首例受试者给药。此前,HLX43单药或联合治疗晚期/转移性实体瘤已在中国启动II期临床研究并完成首例受试者给药。目前,全球尚无同类靶向PD-L1的ADC产品获批上市,仅有SGN-PDL1V(来自辉瑞)计划于2025年下半年启动临床III期试验,HLX43为全球第二款也是国内首款进入临床阶段的靶向PD-L1的ADC产品。近年来,以抗PD-1/L1抗体为代表的免疫检查点抑制剂(ICI)促进了肿瘤免疫治疗的高速发展,成为肿瘤患者各线治疗的主要手段之一。然而,部分患者对该疗法无响应,或者出现耐药[1]。对于免疫治疗耐药或经免疫治疗等标准治疗失败后的患者人群,尚缺少有效的后线治疗方案,亟待探索更前沿的新型治疗方案,进一步提高患者的临床获益。ADC作为当下肿瘤治疗中疗效最突出的新型疗法,已在乳腺癌、肺癌、食管癌、胃癌等多项实体瘤中展现出初步的治疗潜力,成为重要的探索方向[2]。而PD-L1在非小细胞肺癌、结直肠癌、三阴性乳腺癌、鳞状细胞癌等多种癌种中均有表达,且在正常组织中的表达有限,使其成为开发ADC药物的潜力靶点,为肿瘤治疗带来新的途径[3]。HLX43兼具抗体分子的高度靶向性和细胞毒素的强大杀伤力,可通过与肿瘤细胞表面PD-L1 抗原特异性结合,经内吞后释放小分子毒素,从而发挥抗肿瘤作用。其采用的毒素DNA拓扑异构酶I(Topoisomerase I)抑制剂在血液中的半衰期更短,安全性更好,同时其更强的膜穿透性和细胞膜亲和力便于产品发挥旁观者效应[4],独特的作用机制使得HLX43较同类ADC产品具有更大的治疗窗口,增强ADC在实体肿瘤中的治疗效果。临床前研究及I期临床研究提示,HLX43在抗PD-1/PD-L1单抗耐药的非小细胞肺癌等多个瘤种中显示出显著疗效,且耐受性良好,临床前研究数据于2023欧洲肿瘤内科学会(ESMO)大会以壁报形式进行展示。基于此,公司于近期启动了HLX43在食管鳞癌等潜在实体瘤适应症中的II期临床试验,以进一步评HLX43的疗效和安全性。在加速拓展抗体偶联药物(ADC)产品布局的同时,复宏汉霖亦积极探索ADC与免疫治疗药物的联用方案,前瞻性布局IO+ADC治疗领域,以期实现协同增效的抗肿瘤疗效,进一步提高患者的临床获益,解决未满足的临床需求。未来,复宏汉霖将持续立足于未满足的临床需求,充分发挥公司在抗体药物和抗体偶联药物领域的一体化平台优势,加速推动更多前沿治疗方案的研究和开发,为全球患者带来更多高质量、可负担的创新治疗方案。关于HLX43HLX10-ST201本研究为一项旨在评估HLX43联合汉斯状®治疗晚期/转移性实体瘤患者的安全性、耐受性和有效性的Ib/II期临床研究。研究分为Ib期剂量递增和II期剂量拓展两个阶段。第一阶段为开放标签研究,合格的受试者将接受不同剂量的HLX43联合固定剂量的汉斯状®静脉输注给药,每3周一次(Q3W)。第二阶段为多中心、随机、开放标签的对照研究,在第一阶段数据的基础上,评估3个不同剂量的HLX43联合固定剂量汉斯状®在晚期非小细胞肺癌(NSCLC)患者中的安全性和有效性。第一阶段的主要终点为剂量限制性毒性(DLT)观察期内每个剂量组发生DLT事件的受试者比例和HLX43联合汉斯状®用药的最大耐受剂量(MTD)。第二阶段的主要终点为独立影像评估委员会(IRRC)根据实体瘤疗效评价标准(RECIST)v1.1评估的客观缓解率(ORR)。关于复宏汉霖复宏汉霖(2696.HK)是一家国际化的创新生物制药公司,致力于为全球患者提供可负担的高品质生物药,产品覆盖肿瘤、自身免疫疾病、眼科疾病等领域,已有6款产品在中国获批上市,4款产品在国际获批上市,5个上市申请分别获中国药监局、美国FDA和欧盟EMA受理。自2010年成立以来,复宏汉霖已建成一体化生物制药平台,高效及创新的自主核心能力贯穿研发、生产及商业运营全产业链。公司已建立完善高效的全球创新中心,按照国际药品生产质量管理规范(GMP)标准进行生产和质量管控,不断夯实一体化综合生产平台,其中,公司商业化生产基地已相继获得中国、欧盟和美国GMP认证。复宏汉霖前瞻性布局了一个多元化、高质量的产品管线,涵盖约50个分子,并全面推进基于自有抗PD-1单抗H药汉斯状®的肿瘤免疫联合疗法。截至目前,公司已获批上市产品包括国内首个生物类似药汉利康®(利妥昔单抗)、自主研发的中美欧三地获批单抗生物类似药汉曲优®(曲妥珠单抗,美国商品名:HERCESSI™,欧洲商品名:Zercepac®)、汉达远®(阿达木单抗)、汉贝泰®(贝伐珠单抗)、全球首个获批一线治疗小细胞肺癌的抗PD-1单抗汉斯状®(斯鲁利单抗,欧洲商品名:Hetronifly®)以及汉奈佳®(奈拉替尼)。公司亦同步就19个产品在全球范围内开展30多项临床试验,对外授权全面覆盖欧美主流生物药市场和众多新兴市场。First Subject Dosed for a Phase 1b/2 Clinical Trial of Henlius' PD-L1-Targeting ADC HLX43 in Combination with Novel Anti-PD-1 mAb SerplulimabShanghai, China, April 9, 2025 — Shanghai Henlius Biotech, Inc. (2696.HK) announced that the first subject has been dosed for a phase 1b/2 clinical trial of HLX43 for Injection, the novel Programmed Death-Ligand 1 (PD-L1)-targeting antibody-drug conjugate (ADC) that developed by the company based on the collaboration with MediLink Therapeutics, in combination with the Henlius' independently developed innovative anti-PD-1 monoclonal antibody (mAb) HANSIZHUANG (serplulimab injection), for the treatment of patients with advanced/metastatic solid tumours in Chinese mainland. Recently, the company has also completed the first subject dosing for a phase 2 clinical trial of HLX43 for monotherapy or combination therapy to treat patients with advanced/metastatic solid tumours. At present, no PD-L1 targeting ADC has been approved for marketing globally, and only SGN-PDL1V from Pfizer is about to initiate a phase 3 clinical trial. HLX43 is the world's second and China's first PD-L1-targeting ADC to progress to clinical research.Immune checkpoint inhibitors represented by PD-1/PD-L1 monoclonal antibodies have emerged in recent years and revolutionised all lines of treatment for tumour patients. However, there are still many patients with positive PD-L1 expression who do not respond to or develop resistance to PD-1/PD-L1-targeted therapy [1]. To date, there has been no subsequent-line treatment for patients who are resistant to PD-1/L1 immunotherapy or failed to benefit from the standard treatments including immunotherapy, indicating a significant unmet medical need to further improve the clinical benefits for these patients. As a novel targeting therapy with the most prominent anti-tumour efficacy, ADCs have shown preliminary therapeutic potential in the treatment of multiple advanced solid tumours, such as breast cancer (BC), lung cancer (LC), esophageal cancer (EC) and gastric cancer (GC), making it a promising therapeutic in solid tumours [2]. PD-L1 is expressed in patients across a broad spectrum of tumour types including non-small cell lung cancer (NSCLC), colorectal cancer (CRC), triple negative breast cancer (TNBC), squamous cell carcinoma and displays limited expression on normal tissues, highlighting the potential of PD-L1 as a target for ADCs, which may bring new options for cancer treatment [3].Combining the selectivity of targeted monoclonal antibodies with the highly potent cytotoxic agent, HLX43 could exert anti-tumour effects through specific binding to the PD-L1 expressed on the surface of tumour cells and release cytotoxic payloads after internalisation by the cancer cells. The cytotoxic payload of HLX43 is a novel DNA topoisomerase-I inhibitor which are known for their potent anti-tumor activity, shorter half-life in the bloodstream, and improved safety profile [4]. This next generation design allows HLX43 to possess a higher therapeutic index and potency for treatment of solid tumours. Several non-clinical studies and the phase 1 clinical trial have shown that, HLX43 has good anti-tumour effects and a favorable tolerability profile in non-small cell lung cancer (NSCLC), and other tumour types that were PD-1/L1 mAb-resistant. The results of the pre-clinical studies were published as poster presentation at the 2023 European Society of Medical Oncology (ESMO) Congress. Based on these compelling results, Henlius has initiated phase 2 clinical trials of HLX43 in potential solid tumour indications including ESCC 安定other solid tumours to further evaluate the efficacy and safety of HLX43. While accelerating the development of ADCs and diversified drug conjugates, Henlius is also actively exploring combination therapies involving ADCs with immunotherapy to encourage progress in the next wave innovation of “IO+ADC”, further providing more effective treatment options to fulfill the unmet clinical needs.Moving forward, Henlius remains committed to addressing unmet medical needs by leveraging its antibody drug R&D platform, actively driving the development of innovative therapies to deliver high-quality and affordable treatment options to patients worldwide.About HLX43HLX10-ST201This phase 1b/2 study aims to evaluate the safety, tolerability, and efficacy of HLX43 in combination with HANSIZHUANG in patients with advanced/metastatic solid tumors. The study is divided into two stages: phase 1b dose escalation and phase 2 dose expansion. Eligible subjects will receive intravenous infusions of different doses of HLX43 combined with a fixed dose of HANSIZHUANG every three weeks (Q3W). The second stage is a multicenter, randomized, open-label controlled study to evaluate the safety and efficacy of three different doses of HLX43 combined with a fixed dose of HANSIZHUANG in patients with advanced non-small cell lung cancer (NSCLC) based on data from the first stage. The primary endpoints of the first stage are the proportion of subjects experiencing dose-limiting toxicity (DLT) events in each dose group during the DLT observation period and the maximum tolerated dose (MTD) of HLX43 in combination with HANSIZHUANG. The primary endpoint of the second stage is the objective response rate (ORR) assessed by the Independent Radiological Review Committee (IRRC) according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1.About HenliusHenlius (2696.HK) is a global biopharmaceutical company with the vision to offer high-quality, affordable and innovative biologic medicines for patients worldwide with a focus on oncology, autoimmune diseases and ophthalmic diseases. Up to date, 6 products have been launched in China, 4 have been approved for marketing in overseas markets, and 5 marketing applications have been accepted for review in China, the U.S. and the EU, respectively. Since its inception in 2010, Henlius has built an integrated biopharmaceutical platform with core capabilities of high-efficiency and innovation embedded throughout the whole product life cycle including R&D, manufacturing and commercialization. It has established global innovation centre and Shanghai-based commercial manufacturing facilities certificated by China, the EU and U.S. GMP.Henlius has pro-actively built a diversified and high-quality product pipeline covering about 50 molecules and has continued to explore immuno-oncology combination therapies with proprietary HANSIZHUANG (anti-PD-1 mAb) as the backbone. To date, the company's launched products include HANLIKANG (rituximab), the first China-developed biosimilar, HANQUYOU (trastuzumab, trade name: HERCESSI™ in the U.S., Zercepac® in Europe), a China-developed mAb biosimilar approved in China, Europe and U.S., HANDAYUAN (adalimumab), HANBEITAI (bevacizumab), HANSIZHUANG (serplulimab, trade name: Hetronifly® in Europe), the world’s first anti-PD-1 mAb for the first-line treatment of SCLC, and HANNAIJIA (neratinib). What’s more, Henlius has conducted over 30 clinical studies for 19 products, expanding its presence in major markets as well as emerging markets.References[1] Attili I, et al. Strategies to overcome resistance to immune checkpoint blockade in lung cancer[J]. Lung cancer: Journal of the International Association for the Study of Lung Cancer, 2021(154-):154.[2] He J, Zeng X, Wang C, Wang E, Li Y. Antibody-drug conjugates in cancer therapy: mechanisms and clinical studies. MedComm (2020). 2024 Jul 28;5(8):e671.[3] Kwan B, et al. 783 SGN-PDL1V, a novel, investigational PD-L1-directed antibody-drug conjugate for the treatment of solid tumors[J]. 2021.[4] Conilh, L, et al. Payload diversification: a key step in the development of antibody–drug conjugates. J Hematol Oncol 16, 3 (2023).联系方式媒体:PR@Henlius.com投资者:IR@Henlius.com喜欢本文内容点击下方按钮·分享 ·收藏 ·点赞 ·在看