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疾病控制率达90%的创新疗法；靶点作用率达95%的PI3Kα共价抑制剂…… | 一周盘点

药明康德 · 公众号 · 药品 · 2025-01-20 07:30

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▎药明康德内容团队编辑

本期看点

1. 多肽偶联药物（PDC）AVA6000在治疗唾液腺癌（SGC）患者的1a期临床试验中获得积极数据，疾病控制率（DCR）达90%。

2. 蛋白降解药物BHV-1400在首个人体临床试验中获得积极结果，在最低剂量下只需一次注射，就可在4小时内将致病抗体水平降低60%。

3. PI3Kα共价抑制剂TOS-358在一项1期临床试验中对PI3Kα的靶点作用率达到95%。

药明康德内容团队整理

AVA6000：公布1期临床试验数据

Avacta Therapeutics公司宣布，其在研多肽偶联药物AVA6000在治疗唾液腺癌患者的1a期临床试验中获得积极数据。唾液腺癌是一种在转移性阶段尚无标准治疗方案的疾病。AVA6000是Avacta研发管线中的首个多肽偶联药物，由阿霉素（doxorubicin）与Avacta专有的pre|CISION多肽偶联而成，该多肽可在肿瘤微环境中由成纤维细胞激活蛋白-α（FAP）特异性切割。FAP在大多数实体瘤中，与健康组织相比表达水平显著升高。Avacta的多肽偶联药物利用这一特征在肿瘤微环境中特异性释放活性药物，从而降低系统暴露和毒性，为患者提供最佳治疗效果。

此次公布的数据显示，AVA6000在唾液腺癌患者中实现了显著且具有临床意义的肿瘤缩小。在接受250 mg/m²及以上剂量治疗的10名唾液腺癌患者中，DCR达90%，5名患者肿瘤显著缩小，其中包括一例部分缓解（PR，肿瘤缩小45%）和四例轻微缓解（MR，肿瘤缩小10%-19.5%）。安全性方面，在每两周一次和每三周一次两个剂量组中，AVA6000的耐受性良好，与常规剂量阿霉素相比，其血液学和心脏毒性明显降低。目前尚未在任一剂量组中确定最大耐受剂量（MTD）。

BHV-1400：公布1期临床试验的初步数据

Biohaven公司公布了其蛋白降解药物管线中的双特异性分子BHV-1400的最新结果。BHV-1400是一款基于耶鲁大学（Yale University）的MoDE技术的双特异性分子，它的一端与半乳糖缺乏型IgA1（Gd-IgA1）抗体结合，另一端与肝细胞表面的去唾液酸糖蛋白受体（ASGPR）结合。ASGPR介导肝细胞通过内吞过程，将靶点蛋白吞入细胞内进行降解。IgA肾病是由于Gd-IgA1的过度生产造成的，BHV-1400通过降低血液循环和肾脏中的Gd-IgA1水平，有望从根源治疗IgA肾病。

此次公布的初步数据显示，BHV-1400在首个人体临床试验中获得积极结果，在最低剂量下只需一次注射，就可在4小时内将致病抗体水平降低60%。在某些患者中，观察到在8小时内将Gd-IgA1水平降低70%。此外，Gd-IgA1水平的降低在单次注射后可维持数天。安全性方面，迄今为止，BHV-1400在1期临床试验中的安全性和耐受性良好，未发现具有临床意义的先天和适应性免疫力的变化，并且未观察到剂量限制性毒性。这项研究将继续提高BHV-1400的剂量，探索降低Gd-IgA1水平的范围。基于该研究的积极结果，该公司还计划直接启动关键性临床试验，评估BHV-1400治疗IgA肾病的疗效和安全性。

▲BHV-1400快速降低Gd-IgA1水平（图片来源：Biohaven公司官网）

TOS-358：公布1期临床试验数据

Totus Medicines公司公布了其在研PI3Kα共价抑制剂TOS-358的1期临床试验数据。TOS-358是一款具高度特异性、强效的PI3Kα抑制剂，可在临床前模型中实现近100%的PI3Kα抑制，诱导带有PI3Kα突变的异种移植实体瘤的细胞死亡，包含结直肠癌、肺癌、乳腺癌、卵巢癌、食管癌、头颈癌，且几乎没有观察到非靶向抑制。

此次公布的研究结果表明，TOS-358在低至5 mg每日两次（BID）的剂量下具有泛突变临床活性，对PI3Kα的靶点作用率达到95%，且观察到未经确认的完全缓解（CR）。安全性方面，未报道3/4级毒性。值得注意的是，几名接受给药的患者现在已超过6个月未发生进展。在成功完成1期剂量递增研究后，该公司现在启动了一项扩展研究，针对乳腺癌、子宫内膜癌、尿路上皮癌和头颈癌。

ORIC-944：公布1b期联合治疗试验数据

ORIC Pharmaceuticals公司公布了其选择性PRC2别构抑制剂ORIC-944联用阿帕鲁胺治疗转移性去势抵抗性前列腺癌（mCRPC）的1b期临床试验数据。截至2024年12月10日的数据，6例患者中有3例达到确认的PSA50应答（即PSA水平降低50%），其中2例达到确认的PSA90应答。所有PSA应答均维持≥12周，其中包括一例在38周时仍然持续的、确认的PSA90应答。

Soquelitinib：公布1期临床试验的中期数据

Corvus Pharmaceuticals公司公布了其小分子白细胞介素-2诱导的T细胞激酶（ITK）抑制剂soquelitinib用于治疗中度至重度特应性皮炎的1期临床试验的新中期数据。ITK是一种主要表达于T细胞中的酶，在T细胞和自然杀伤（NK）细胞的免疫功能中起重要作用。通过抑制ITK，soquelitinib有望抑制自身免疫和炎症反应。

此次公布的结果显示，与安慰剂相比，soquelitinib治疗组在研究者总体评估（IGA）评分为0/1（皮肤症状清除或几乎清除）和湿疹面积和严重度指数较基线减少75%（EASI 75）这些临床终点方面显示出良好的疗效特征。在soquelitinib组的19例患者中，26%的患者达到IGA 0/1，37%的患者达到EASI 75。在安慰剂组的7例患者中，没有人达到IGA 0/1，也没有人达到EASI 75。安全性方面，未观察到明显的安全问题，也未发现临床上显著的实验室检测异常。

▲治疗第28天达到终点IGA 0/1、EASI 75的患者占比（图片来源：参考资料[4]）

ISM5411：公布两项1期临床试验数据

英矽智能（Insilico Medicine）公司宣布，其自主研发的候选药物ISM5411已完成在澳大利亚和中国开展的两项1期研究，并取得了积极的初步结果。ISM5411是一种潜在用于治疗炎症性肠病（IBD）的小分子抑制剂，靶向PHD1/2靶点且具有新颖的分子结构，该候选药物设计和优化得到了英矽智能生成化学平台Chemistry42的支持。

此次公布的结果显示，在所有剂量组中ISM5411均表现出良好的安全性和耐受性，并初步验证了肠道限制性药代动力学（PK）特征。基于1期临床试验的积极结果，英矽智能预计将于2025年下半年启动一项评估ISM5411在活动性溃疡性结肠炎患者中的2期临床试验。

MBX 1416：公布1期临床试验数据

MBX Biosciences公司公布了在健康成年受试者中开展的MBX 1416单剂量递增和多剂量递增临床试验的积极结果。MBX 1416是一种长效胰高血糖素样肽1（GLP-1）受体拮抗剂，用于治疗减肥后的低血糖症（PBH）。MBX 1416采用MBX公司新颖、专有的精准内分泌肽（PEP）平台设计，旨在防止PBH患者发生严重低血糖，使他们能够过上更健康、更独立的生活。

此次公布的结果显示，MBX 1416通常安全性和耐受性良好，并且具有良好的药代动力学特征，支持每周一次给药。基于这些结果，该公司计划于2025年下半年在PBH患者中启动一项2期研究，以进一步优化剂量。

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参考资料（可上下滑动查看）

[1] Avacta Announces Positive New Data from the AVA6000 Phase 1 trial Demonstrating Clinically Meaningful Tumor Shrinkage in Patients with Salivary Gland Cancers. Retrieved January 16, 2025, from https://www.globenewswire.com/news-release/2025/01/16/3010665/0/en/Avacta-Announces-Positive-New-Data-from-the-AVA6000-Phase-1-trial-Demonstrating-Clinically-Meaningful-Tumor-Shrinkage-in-Patients-with-Salivary-Gland-Cancers.html

[2] Biohaven Highlights Portfolio Progress, Innovation, and Anticipated Milestones at the 43rd Annual J.P. Morgan Healthcare Conference; Reports Positive Degrader Data with Rapid, Deep, and Selective Lowering of Galactose-Deficient IgA1 with Next Generation Potential Therapy for IgA Nephropathy. Retrieved January 14, 2025, from https://www.prnewswire.com/news-releases/biohaven-highlights-portfolio-progress-innovation-and-anticipated-milestones-at-the-43rd-annual-jp-morgan-healthcare-conference-reports-positive-degrader-data-with-rapid-deep-and-selective-lowering-of-galactose-deficient-ig-302349336.html

[3] Totus Medicines Announces Successful Completion of a Phase 1 Dose-Escalation Study and Initiation of an Expansion Trial Evaluating TOS-358, a Covalent PI3Ka Selective Therapy for the Treatment of Select Solid Tumors and Appoints Zelanna Goldberg as Chief Medical Officer. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/10/3007658/0/en/Totus-Medicines-Announces-Successful-Completion-of-a-Phase-1-Dose-Escalation-Study-and-Initiation-of-an-Expansion-Trial-Evaluating-TOS-358-a-Covalent-PI3Ka-Selective-Therapy-for-th.html

[4] Corvus Pharmaceuticals Announces Data from Cohort 2 of Placebo-Controlled Phase 1 Clinical Trial of Soquelitinib for Atopic Dermatitis. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/13/3008374/0/en/Corvus-Pharmaceuticals-Announces-Data-from-Cohort-2-of-Placebo-Controlled-Phase-1-Clinical-Trial-of-Soquelitinib-for-Atopic-Dermatitis.html

[5] ORIC® Pharmaceuticals Provides Early Phase 1b Combination Data for ORIC-944, Operational Highlights for 2024, and Anticipated Upcoming Milestones. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/13/3008495/0/en/ORIC-Pharmaceuticals-Provides-Early-Phase-1b-Combination-Data-for-ORIC-944-Operational-Highlights-for-2024-and-Anticipated-Upcoming-Milestones.html

[6] 英矽智能公布炎症性肠病药物ISM5411两项I期临床试验的积极结果. Retrieved January 17, 2025, from https://www.prnasia.com/story/474986-1.shtml

[7] MBX Biosciences Announces Positive Phase 1 Topline Results for MBX 1416 for the Treatment of Post-bariatric Hypoglycemia. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/07/3005223/0/en/MBX-Biosciences-Announces-Positive-Phase-1-Topline-Results-for-MBX-1416-for-the-Treatment-of-Post-bariatric-Hypoglycemia.html

[8] Mersana Therapeutics Announces Positive Initial Clinical Data from Phase 1 Clinical Trial of Emiltatug Ledadotin (XMT-1660); Initiation of Expansion in Triple Negative Breast Cancer. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/10/3007493/0/en/Mersana-Therapeutics-Announces-Positive-Initial-Clinical-Data-from-Phase-1-Clinical-Trial-of-Emiltatug-Ledadotin-XMT-1660-Initiation-of-Expansion-in-Triple-Negative-Breast-Cancer.html

[9] Axcynsis Therapeutics Receives FDA Clearance for IND Application of AT03-65, a Differentiated CLDN6-Targeting ADC, Powered by AxcynDOT™ Technology. Retrieved January 17, 2025, from https://www.prnewswire.com/news-releases/axcynsis-therapeutics-receives-fda-clearance-for-ind-application-of-at03-65-a-differentiated-cldn6-targeting-adc-powered-by-axcyndot-technology-302350114.html

[10] Ocugen, Inc. Announces Positive 2-Year Data Across Multiple Mutations from Phase 1/2 Clinical Trial of OCU400 —A Novel Modifier Gene Therapy for Retinitis Pigmentosa. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/13/3008252/0/en/Ocugen-Inc-Announces-Positive-2-Year-Data-Across-Multiple-Mutations-from-Phase-1-2-Clinical-Trial-of-OCU400-A-Novel-Modifier-Gene-Therapy-for-Retinitis-Pigmentosa.html

[11] Verismo Therapeutics Announces First Patient Infused in Phase 1 CELESTIAL-301 Clinical Trial of SynKIR™-310. Retrieved January 17, 2025, from https://www.prnewswire.com/news-releases/verismo-therapeutics-announces-first-patient-infused-in-phase-1-celestial-301-clinical-trial-of-synkir-310-302347464.html

[12] Caribou Biosciences Initiates the CB-010 GALLOP Phase 1 Trial in Lupus and Provides Outlook for Multiple Clinical Datasets in 2025. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/13/3008079/0/en/Caribou-Biosciences-Initiates-the-CB-010-GALLOP-Phase-1-Trial-in-Lupus-and-Provides-Outlook-for-Multiple-Clinical-Datasets-in-2025.html

[13] Arcturus Therapeutics Announces Initiation of Phase 1 H5N1 Flu Vaccine Trial. Retrieved January 17, 2025, from https://ir.arcturusrx.com/news-releases/news-release-details/arcturus-therapeutics-announces-initiation-phase-1-h5n1-flu

[14] Korro Bio Announces Dosing of First Participants in REWRITE Phase 1/2a Study of KRRO-110 for Alpha-1 Antitrypsin Deficiency and Provides Pipeline Update. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/13/3008445/0/en/Korro-Bio-Announces-Dosing-of-First-Participants-in-REWRITE-Phase-1-2a-Study-of-KRRO-110-for-Alpha-1-Antitrypsin-Deficiency-and-Provides-Pipeline-Update.html

[15] NextCure Announces First Patient Dosed in the Phase 1 Study of LNCB74 (B7-H4 ADC) as Therapeutic for Treating Multiple Cancers. Retrieved January 17, 2025, from https://ir.nextcure.com/news-releases/news-release-details/nextcure-announces-first-patient-dosed-phase-1-study-lncb74-b7

[16] LAVA Doses First Patient in Phase 1 LAVA-1266 Study in Hematological Cancers. Retrieved January 17, 2025, from https://www.globenewswire.com/news-release/2025/01/10/3007674/0/en/LAVA-Doses-First-Patient-in-Phase-1-LAVA-1266-Study-in-Hematological-Cancers.html

[17] Context Therapeutics Announces First Patient Dosed in the Phase 1 Clinical Trial of CTIM-76. Retrieved January 17, 2025, from https://www.globenewswire.com/de/news-release/2025/01/14/3009673/0/en/Context-Therapeutics-Announces-First-Patient-Dosed-in-the-Phase-1-Clinical-Trial-of-CTIM-76.html

[18] Ocugen, Inc. Announces First Patient Dosed in Phase 1 Clinical Trial of OCU200—a Novel Integrin-Targeting Biologic for Diabetic Macular Edema. Retrieved January 17, 2025, from https://ir.ocugen.com/news-releases/news-release-details/ocugen-inc-announces-first-patient-dosed-phase-1-clinical-trial

[19] ProMIS Neurosciences Initiates Phase 1b Clinical Trial (PRECISE-AD) in Alzheimer’s Disease. Retrieved January 17, 2025, from https://www.promisneurosciences.com/news-media/press-releases/detail/236/promis-neurosciences-initiates-phase-1b-clinical-trial

[20] Aptose Announces First AML Patients Dosed with Tuspetinib Triplet Frontline Therapy in TUSCANY Trial. Retrieved January 17, 2025, from https://www.aptose.com/news-media/press-releases/detail/307/aptose-announces-first-aml-patients-dosed-with-tuspetinib

[21] ORYZON announces first patient dosed in NCI-sponsored iadademstat in combination with venetoclax and azacitidine clinical trial in first line acute myeloid leukemia. Retrieved January 17, 2025, from https://www.oryzon.com/en/news-events/news/oryzon-announces-first-patient-dosed-nci-sponsored-iadademstat-combination

[22] 한미약품-GC녹십자, ‘파브리병’ 국내 1/2상 IND 승인. Retrieved January 17, 2025, from https://www.biospectator.com/news/view/24043

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