2025年5月16日,复宏汉霖(2696.HK)宣布,公司自主研制的伊匹木单抗生物类似药HLX13(重组抗CTLA-4全人单克隆抗体注射液)的I/III期临床研究(NCT06841185)在中国完成首例受试者给药。复宏汉霖已于2025年4月与Sandoz达成授权许可合作,授予Sandoz对HLX13在美国、欧洲42个国家和地区、日本、加拿大及澳大利亚的独家商业化权益。 近年来,免疫疗法为肿瘤治疗提供了新的途径,具有独特的优势和巨大的潜力。肿瘤免疫检查点抑制剂是肿瘤免疫治疗中的重要组成部分[1]。与PD-1/L1、LAG-3相似,细胞毒性T淋巴细胞相关抗原4(cytotoxic T-lymphocyte-associated protein 4, CTLA-4)也是一类免疫抑制型检查点蛋白,主要表达在调节性T细胞和活化的T细胞上。与CD28相比,CTLA-4对B7分子的亲和力更强,通过与CD28竞争性结合抗原呈递细胞上的B7配体(B7-1和B7-2),抑制T细胞的增殖和活化[2]。全人抗CTLA-4单克隆抗体能够解除CTLA-4对T细胞活化所需的共刺激信号的抑制,增加活性效应T细胞的数量,从而动员 T 细胞对肿瘤细胞发动直接免疫攻击。此外,抗CTLA-4单抗可选择性地耗尽肿瘤部位的调节T细胞,导致肿瘤内效应T细胞/调节T细胞的比例增加,从而导致肿瘤细胞死亡。研究证明,伊匹木单抗注射液与PD-1抑制剂组成的双免疫联合疗法能够产生协同的抗肿瘤效果,为患者带来更大的临床获益[3-4]。截至目前,伊匹木单抗联合纳武利尤单抗已在全球多个国家和地区获批,适应症包括联合纳武利尤单抗用于黑色素瘤、肝细胞癌等一系列适应症。 HLX13(抗CTLA-4单抗)药理作用示意图 HLX13是复宏汉霖严格按照中国、欧盟和美国等生物类似药法规自主研发的伊匹木单抗注射液生物类似药,有望用于多种实体瘤的治疗。公司已经完成了HLX13与原研药伊匹木单抗注射液的药学、临床前药理学、毒理学和药代动力学全面对比研究,上述临床前研究未发现HLX13与原研药伊匹木单抗注射液存在显著差异。 未来,复宏汉霖还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,持续探索免疫治疗在肿瘤中的治疗潜力,为全球患者带来更多高质量、可负担的创新治疗方案。 关于NCT06841185 关于复宏汉霖 First Subject Dosed for Phase 1/3 Clinical Trial of Henlius’ Proposed Ipilimumab Biosimilar Shanghai, China, May 16, 2025 - Shanghai Henlius Biotech, Inc. (2696.HK) announced that the first subject was dosed for a phase 1/3 clinical trial of the company's independently developed ipilimumab biosimilar HLX13 (recombinant anti-CTLA-4 fully human monoclonal antibody injection) in China. In April 2025, Henlius entered into a license agreement with Sandoz, granting Sandoz the exclusive commercial rights for HLX13 in the United States, 42 European countries and regions, Japan, Canada, and Australia. Immune checkpoint inhibitors are playing a crucial part in immunotherapy, which has emerged in recent years as a novel approach to combating tumour cells with distinct advantages and enormous promise [1]. In addition to PD-1/L1 and LAG-3, CTLA-4 is also an inhibitory immune checkpoint which expressed on regulatory T cells and activated T cells and has a higher affinity to B7 molecules compared with CD28, thus can competitively bind to B7 molecules to inhibit the proliferation and activation of T cells [2]. Anti-CTLA-4 fully human monoclonal antibody (mAb) can block the inhibitory effects of CTLA-4 on the co-stimulation signal necessary to T cell activation and can increase the number of reactive T-effector cells which mobilize to mount a direct T-cell immune attack against tumour cells. Also, anti-CTLA-4 mAb may selectively deplete T-regulatory cells at the tumour site, leading to an increase in the intratumoral T-effector/T-regulatory cell ratio which drives tumour cell death. Meanwhile, results showed that the combination therapy of anti-CTLA-4 mAb and anti-PD-1 mAb is expected to have a synergistic effect and may bring additional clinical benefit to patients [3-4]. Currently, ipilimumab has been approved in various countries and regions in combination with nivolumab for the treatment of melanoma and hepatocellular carcinoma, among other indications. HLX13 is a biosimilar of ipilimumab independently developed by Henlius in accordance with the NMPA, EMA, FDA and other international biosimilar guidelines. The indications to be developed for HLX13 are solid tumours. Henlius has conducted a series of head-to-head pre-clinical studies to compare the chemical manufacture and control (CMC), pharmacology, toxicity, and pharmacokinetics profiles of HLX13 and originator ipilimumab. Results from these studies showed that there is a high similarity or no significant difference between HLX13 and originator ipilimumab. Looking forward, Henlius will continue to focus on unmet clinical needs and bring more high-quality, affordable and innovative therapeutic solutions to patients around the world by giving full play to the company's integrated platform advantages in the field of antibody drugs and antibody-drug conjugates, and by continuing to explore the therapeutic potential of immunotherapy in oncology field. About NCT06841185 About Henlius 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







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