{"id":57003,"date":"2026-02-12T22:07:16","date_gmt":"2026-02-12T14:07:16","guid":{"rendered":"https:\/\/flcube.com\/?p=57003"},"modified":"2026-02-12T22:07:19","modified_gmt":"2026-02-12T14:07:19","slug":"henlius-biotech-initiates-phase-ib-ii-study-for-hlx43-adc-combinations-in-colorectal-cancer","status":"publish","type":"post","link":"https:\/\/flcube.com\/?p=57003","title":{"rendered":"Henlius Biotech Initiates Phase Ib\/II Study for HLX43 ADC Combinations in Colorectal Cancer"},"content":{"rendered":"\n<p><strong>Shanghai Henlius Biotech, Inc.<\/strong> (<strong><a href=\"https:\/\/www.google.com\/finance\/quote\/2696:HKG\">HKG:\u202f2696<\/a><\/strong>) announced <strong>first patient dosing<\/strong> in a <strong>Phase Ib\/II clinical study<\/strong> evaluating <strong>HLX43<\/strong>, a <strong>PD-L1-targeting antibody-drug conjugate (ADC)<\/strong>, in combination with <strong>HLX07 (anti-EGFR mAb)<\/strong> or <strong>HanSiZhuang (serplulimab, PD-1 mAb)<\/strong> for <strong>advanced or metastatic colorectal cancer (CRC)<\/strong>. The trial marks <strong>Henlius&#8217;s entry into ADC-based immuno-oncology combinations<\/strong>, leveraging its <strong>self-developed antibody platforms<\/strong> and <strong>licensed toxin-linker technology<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-clinical-trial-design\">Clinical Trial Design<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Element<\/th><th>Detail<\/th><\/tr><\/thead><tbody><tr><td><strong>Company<\/strong><\/td><td>Shanghai Henlius Biotech, Inc. (HKG:\u202f2696)<\/td><\/tr><tr><td><strong>Assets<\/strong><\/td><td>HLX43 (PD-L1 ADC) + HLX07 (anti-EGFR mAb) OR HanSiZhuang (PD-1 mAb)<\/td><\/tr><tr><td><strong>Indication<\/strong><\/td><td>Advanced\/metastatic colorectal cancer (mCRC)<\/td><\/tr><tr><td><strong>Study Phase<\/strong><\/td><td>Phase Ib\/II<\/td><\/tr><tr><td><strong>Study Structure<\/strong><\/td><td><strong>Part 1<\/strong>: Safety run-in + dose expansion; <strong>Part 2<\/strong>: Randomized efficacy evaluation<\/td><\/tr><tr><td><strong>Part 2 Design<\/strong><\/td><td>HLX43 (2.0 or 2.5 mg\/kg) + HanSiZhuang (300 mg Q3W) vs. comparator<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-product-profile-amp-mechanism\">Product Profile &amp; Mechanism<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Asset<\/th><th>Class<\/th><th>Mechanism<\/th><th>Origin<\/th><\/tr><\/thead><tbody><tr><td><strong>HLX43<\/strong><\/td><td><strong>PD-L1-targeting ADC<\/strong><\/td><td>PD-L1 antibody + DNA topoisomerase I inhibitor toxin<\/td><td><strong>Licensed-in ADC technology<\/strong> + <strong>self-developed PD-L1 antibody<\/strong><\/td><\/tr><tr><td><strong>HLX07<\/strong><\/td><td>Anti-EGFR monoclonal antibody<\/td><td>EGFR pathway blockade<\/td><td><strong>In-house developed<\/strong><\/td><\/tr><tr><td><strong>HanSiZhuang (serplulimab)<\/strong><\/td><td>PD-1 monoclonal antibody<\/td><td>Immune checkpoint inhibition<\/td><td><strong>Self-developed<\/strong>; <strong>approved in China<\/strong> for 4 indications (sqNSCLC, ES-SCLC, ESCC, nsqNSCLC)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-strategic-rationale-amp-combination-logic\">Strategic Rationale &amp; Combination Logic<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Combination<\/th><th>Rationale<\/th><th>Strategic Value<\/th><\/tr><\/thead><tbody><tr><td><strong>HLX43 + HLX07<\/strong><\/td><td><strong>PD-L1 ADC + EGFR blockade<\/strong><\/td><td>Dual targeting of immune evasion and growth signaling; potential for <strong>RAS wild-type CRC<\/strong> population<\/td><\/tr><tr><td><strong>HLX43 + HanSiZhuang<\/strong><\/td><td><strong>PD-L1 ADC + PD-1 mAb<\/strong><\/td><td><strong>Dual PD-L1\/PD-1 axis inhibition<\/strong> with cytotoxic payload; addresses <strong>primary and acquired resistance<\/strong> to checkpoint monotherapy<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-study-objectives-amp-biomarker-strategy\">Study Objectives &amp; Biomarker Strategy<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Endpoint Category<\/th><th>Specific Assessments<\/th><th>Innovation Focus<\/th><\/tr><\/thead><tbody><tr><td><strong>Safety\/Tolerability<\/strong><\/td><td>Dose-limiting toxicities; MTD determination<\/td><td>ADC + immunotherapy combination safety profile<\/td><\/tr><tr><td><strong>Efficacy<\/strong><\/td><td>ORR, DOR, PFS, OS (Part 2 randomized)<\/td><td><strong>PD-L1 ADC mechanism validation<\/strong> in MSS CRC (typically immunotherapy-resistant)<\/td><\/tr><tr><td><strong>Pharmacokinetics<\/strong><\/td><td>HLX43 exposure; immunogenicity<\/td><td><strong>ADC PK optimization<\/strong> for combination setting<\/td><\/tr><tr><td><strong>Biomarkers<\/strong><\/td><td>Predictive\/resistance markers<\/td><td><strong>Patient selection strategy<\/strong> for Phase III design<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-market-context-amp-competitive-positioning\">Market Context &amp; Competitive Positioning<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Factor<\/th><th>Strategic Analysis<\/th><\/tr><\/thead><tbody><tr><td><strong>CRC Immunotherapy Challenge<\/strong><\/td><td><strong>95% of mCRC is MSS (microsatellite stable)<\/strong> \u2013 <strong>resistant to PD-1 monotherapy<\/strong>; <strong>ADC + IO combinations<\/strong> represent <strong>novel approach to overcome resistance<\/strong><\/td><\/tr><tr><td><strong>Henlius Portfolio Synergy<\/strong><\/td><td><strong>HanSiZhuang commercial infrastructure<\/strong> (4 approved indications) enables <strong>rapid CRC trial enrollment<\/strong> and <strong>combination therapy expertise<\/strong><\/td><\/tr><tr><td><strong>ADC Competitive Landscape<\/strong><\/td><td><strong>T-DXd (Enhertu)<\/strong>, <strong>sacituzumab govitecan (Trodelvy)<\/strong> lead in solid tumors; <strong>HLX43 PD-L1 targeting<\/strong> offers <strong>differentiation<\/strong> vs. HER2\/TROP2 ADCs<\/td><\/tr><tr><td><strong>China CRC Market<\/strong><\/td><td><strong>&gt;380,000 new cases annually<\/strong>; <strong>limited targeted therapy options<\/strong> beyond anti-EGFR (RAS wild-type); <strong>significant unmet need<\/strong> in RAS-mutant population<\/td><\/tr><tr><td><strong>Global Potential<\/strong><\/td><td><strong>MSS CRC<\/strong> represents <strong>largest immunotherapy-resistant population<\/strong> globally; <strong>China-first data<\/strong> supports <strong>US\/EU partnership discussions<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Forward\u2011Looking Statements<\/strong><br>This brief contains forward\u2011looking statements regarding HLX43 clinical development in colorectal cancer, combination therapy efficacy in MSS tumors, and Henlius Biotech&#8217;s ADC platform validation. Actual results may differ due to Phase Ib\/II safety outcomes, competitive dynamics with established ADCs, and biomarker discovery success.<a href=\"https:\/\/flcube.com\/\">-Fineline Info &amp; Tech<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Shanghai Henlius Biotech, Inc. (HKG:\u202f2696) announced first patient dosing in a Phase Ib\/II clinical study&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAownpewDA:productID":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[7,11],"tags":[35,62,29,270,862,18],"class_list":["post-57003","post","type-post","status-publish","format-standard","hentry","category-company","category-drug","tag-adc-xdc","tag-clinical-trial-approval-initiation","tag-combination-therapy","tag-henlius-biotech","tag-hkg-2696","tag-pd-1-l1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Henlius Biotech Initiates Phase Ib\/II Study for HLX43 ADC Combinations in Colorectal Cancer - Insight, China&#039;s Pharmaceutical Industry<\/title>\n<meta name=\"description\" content=\"Shanghai Henlius Biotech, Inc. 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(HKG:\u202f2696) announced first patient dosing in a Phase Ib\/II clinical study evaluating HLX43, a PD-L1-targeting antibody-drug conjugate (ADC), in combination with HLX07 (anti-EGFR mAb) or HanSiZhuang (serplulimab, PD-1 mAb) for advanced or metastatic colorectal cancer (CRC). The trial marks Henlius's entry into ADC-based immuno-oncology combinations, leveraging its self-developed antibody platforms and licensed toxin-linker technology.","breadcrumb":{"@id":"https:\/\/flcube.com\/?p=57003#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/flcube.com\/?p=57003"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/flcube.com\/?p=57003#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/flcube.com\/"},{"@type":"ListItem","position":2,"name":"Henlius Biotech Initiates Phase Ib\/II Study for HLX43 ADC Combinations in Colorectal Cancer"}]},{"@type":"WebSite","@id":"https:\/\/flcube.com\/#website","url":"https:\/\/flcube.com\/","name":"Insight, China's Pharmaceutical Industry","description":"Fineline Insights, Pharma Clarity","publisher":{"@id":"https:\/\/flcube.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/flcube.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/flcube.com\/#organization","name":"Fineline Infomation and Technology","alternateName":"Fineline Info & Tech","url":"https:\/\/flcube.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/flcube.com\/#\/schema\/logo\/image\/","url":"https:\/\/flcube.com\/wp-content\/uploads\/2024\/11\/Fineline-info-tech-scaled.jpg","contentUrl":"https:\/\/flcube.com\/wp-content\/uploads\/2024\/11\/Fineline-info-tech-scaled.jpg","width":2560,"height":1894,"caption":"Fineline Infomation and Technology"},"image":{"@id":"https:\/\/flcube.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61566606313834"]},{"@type":"Person","@id":"https:\/\/flcube.com\/#\/schema\/person\/19ad11870d326204db8524d3c3c5e66a","name":"Fineline Cube","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/89f733aaed3d2d91d7d6f45d0e9ab509e3004e8243c6e57620b36380684657f2?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/89f733aaed3d2d91d7d6f45d0e9ab509e3004e8243c6e57620b36380684657f2?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/89f733aaed3d2d91d7d6f45d0e9ab509e3004e8243c6e57620b36380684657f2?s=96&d=mm&r=g","caption":"Fineline Cube"},"sameAs":["https:\/\/flcube.com"],"url":"https:\/\/flcube.com\/?author=1"}]}},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/posts\/57003","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flcube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=57003"}],"version-history":[{"count":1,"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/posts\/57003\/revisions"}],"predecessor-version":[{"id":57004,"href":"https:\/\/flcube.com\/index.php?rest_route=\/wp\/v2\/posts\/57003\/revisions\/57004"}],"wp:attachment":[{"href":"https:\/\/flcube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=57003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flcube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=57003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flcube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=57003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}