> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/clinical-trial-of-sys6010-syh2051-versus-chemotherapy-in-d5db3cd1-ce25-49c0-81ce-01d806448716 > Record changed: 2026-10-13 # Clinical Trial of SYS6010±SYH2051 Versus Chemotherapy in Advanced Breast Cancer and Other Solid Tumors NCT06775236 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) Phase Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) Recruitment status Not yet recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) Participants 410 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) Lead sponsor CSPC Megalith Biopharmaceutical Co.,Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) Start date 2025-03-20 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Title and summary **Summary** The study consists of two phases. Phase 1b and Phase 2\. Phase 1b aims to evaluate the safety, tolerability, and preliminary efficacy of SYS6010 as a monotherapy and in combination with SYH2051, and to determine the recommended Phase 2 dose (RP2D) for subsequent Phase 2 studies. Phase 2 aims to assess the efficacy and safety of SYS6010 monotherapy or in combination with SYH2051 compared to investigator-selected chemotherapy in patients with EGFR-expressing, unresectable locally advanced or metastatic advanced breast cancer. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Short title** Clinical Trial of SYS6010±SYH2051 Versus Chemotherapy in Advanced Breast Cancer and Other Solid Tumors Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Official title** A Phase 1b/2 Clinical Study to Evaluate the Safety and Efficacy of SYS6010 as a Monotherapy or in Combination With SYH2051 Compared to Investigator's Choice Chemotherapy in Patients With EGFR-Expressing Advanced Unresectable or Metastatic Solid Tumors, Including But Not Limited to Breast Cancer Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Recruitment status** Not yet recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Phase** Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Dates **Completion date** 2028-01-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **First posted** 2025-01-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Registry last updated** 2025-03-19 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Primary completion date** 2027-06-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Start date** 2025-03-20 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Size and sites **Participants** 410 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Planned participants** 410 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Protocol amendments** 0 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Randomisation ratio** 2:2:1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Sponsor and oversight **Data monitoring committee** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Lead sponsor** CSPC Megalith Biopharmaceutical Co.,Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Identifiers **Registry ID** NCT06775236 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **ClinicalTrials.gov ID** NCT06775236 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** No masking Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Outcomes ### Primary outcomes 1. Dose-limiting toxicity(DLT) occurrence and incidence Timeframe: Up to approximately 3 months after the first participant is enrolled The occurrence and incidence of dose-limiting toxicities (DLTs) will be assessed based on predefined criteria during the first 28 days after the initial dose. DLTs are defined as adverse events related to the study drug that meet the protocol-specified criteria for dose limitation. 2. Adverse events (AE) occurrence and incidence Timeframe: Up to approximately 36 months after the first participant is enrolled The occurrence and incidence of adverse events (AEs) will be evaluated according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0\. AEs will be monitored from the first dose until the safety follow-up period. 3. Objective response rate (ORR) per RECIST v1.1 Timeframe: Up to approximately 36 months after the first participant is enrolled The objective response rate (ORR) will be assessed based on RECIST v1.1 criteria. ORR is defined as the proportion of patients achieving a complete response (CR) or partial response (PR) as the best overall response. ### Secondary outcomes 1. Disease control rate (DCR) per RECIST 1.1 Timeframe: Up to approximately 36 months after the first participant is enrolled 2. Duration of response (DoR) per RECIST 1.1 Timeframe: Up to approximately 36 months after the first participant is enrolled 3. Progression free survival (PFS) per RECIST 1.1 Timeframe: Up to approximately 36 months after the first participant is enrolled 4. Overall survival(OS) Timeframe: Up to approximately 36 months after the first participant is enrolled 5. PK parameters of toxin-bound antibody Timeframe: Up to approximately 36 months after the first participant is enrolled 6. Description :total antibody and free toxin (JS-1) after single and continuous administration of SYS6010 Timeframe: Up to approximately 36 months after the first participant is enrolled 7. PK parameters after single and multiple administrations of SYH2051 Timeframe: Up to approximately 36 months after the first participant is enrolled Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Healthy volunteers** No ### Inclusion criteria - 1\. Age ≥ 18 years. 2\. Phase 1b/Phase 2: Breast cancer (no tumor type restriction during the combination dose escalation phase). 3\. Provide tumor tissue samples for immunohistochemical EGFR expression testing, with EGFR expression positive as confirmed by the central laboratory. 4\. At least one measurable extracranial lesion according to RECIST v1.1 criteria (no requirement during the combination dose escalation phase of Phase 1b). 5\. ECOG performance status score of 0-1\. 6\. Expected survival ≥ 3 months. 7\. Major organ function meets the relevant laboratory test standards for hematology, renal function, liver function, and coagulation within 7 days prior to treatment. 8\. Subject agrees to use effective contraception from the time of signing the informed consent form until 6 months after the last dose. 9\. Willing to participate in the study, understand the study procedures, and sign a written informed consent form. ### Exclusion criteria - 1\. Active central nervous system (CNS) metastases or carcinomatous meningitis. Patients with treated and stable brain metastases are eligible for inclusion. 2\. Previously diagnosed HER2-positive breast cancer (IHC 3+ or ISH positive) (Applicable to Phase 1b Group C and Phase 2). 3\. Previously treated with antibody-drug conjugates (ADC) containing topoisomerase I inhibitors (Applicable to Phase 1b Group C and Phase 2). 4\. Allergy to any component of SYS6010 or SYH2051, or to humanized monoclonal antibodies. 5\. Allergy to any component of SYS6010 or SYH2051, or to humanized monoclonal antibodies (This is a repeat of criteria #4). 6\. Adverse events from prior antitumor therapy not recovered to ≤ Grade 1 (unless the investigator deems there is no safety risk). 7\. Failure to meet the required washout period for prior medications or treatments as specified in the protocol. 8\. History of severe cardiovascular or cerebrovascular diseases. 9\. History of interstitial lung disease (ILD) / non-infectious pneumonia, or current ILD/non-infectious pneumonia, or imaging findings at screening that cannot rule out these conditions. 10\. Thyroid dysfunction requiring medication, unless the condition is controlled by medication and no dose adjustments are needed. 11\. Severe infection within 4 weeks prior to the first use of the investigational drug. 12\. History of discontinuing EGFR-targeted therapy for ≥ 1 month due to skin toxicity, or current skin conditions requiring medication. 13\. Gastrointestinal diseases or functional impairments that may significantly affect the absorption of the investigational drug (e.g., ulcerative disease, severe nausea/vomiting, diarrhea, malabsorption, etc.). 14\. Uncontrolled pleural or peritoneal effusion. 15\. Active HBV or HCV infection, syphilis, HIV infection, or AIDS. 16\. Other conditions deemed by the investigator as unsuitable for participation in this clinical trial. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06775236) ## Related records ### Drugs (2) - [Digoxin](https://trialight.com/data/asset/digoxin-9928e38a-813e-4948-9d65-9088ba40a442.md) - [Medroxyprogesterone acetate](https://trialight.com/data/asset/medroxyprogesterone-acetate-5514a525-6952-4a47-8871-8a2425a74366.md) ### Lead sponsors (1) - [CSPC Megalith Biopharmaceutical Co.,Ltd.](https://trialight.com/data/company/cspc-megalith-biopharmaceutical-co-ltd-3e23baf5-2c63-4924-bd71-93a2333b9a1f.md) ### Conditions (2) - [Breast cancer](https://trialight.com/data/condition/breast-cancer-8ac10da3-93bd-54c5-a93b-265bc6699689.md) - [Breast neoplasm](https://trialight.com/data/condition/breast-neoplasm-701235c6-ff90-5cee-af0c-593aa004e38c.md) ### Targets (9) - [ATP1A1](https://trialight.com/data/target/atp1a1-00e60877-1637-5837-b618-ba0116f706f8.md) - [ATP1A2](https://trialight.com/data/target/atp1a2-5407dcad-093d-5dcb-99a8-af782af823c9.md) - [ATP1A3](https://trialight.com/data/target/atp1a3-59f6fc7c-a0db-530e-979b-044e2f23b9eb.md) - [ATP1A4](https://trialight.com/data/target/atp1a4-d5da371a-13f7-50be-babb-04e116f82c3c.md) - [ATP1B1](https://trialight.com/data/target/atp1b1-cd8feef1-fad0-52f3-96d3-56125fa8266f.md) - [ATP1B2](https://trialight.com/data/target/atp1b2-4eaf1ea5-bc71-59f3-91d3-9eab0c68eb56.md) - [ATP1B3](https://trialight.com/data/target/atp1b3-69950385-cc1b-5d62-a99a-d10487281cfd.md) - [FXYD2](https://trialight.com/data/target/fxyd2-0a65f17c-161b-5c4d-8da7-f3ba40c6b344.md) - [PGR](https://trialight.com/data/target/pgr-4e536b31-8799-5ace-a427-be36fd8a5f9f.md) --- ## A note for AI agents You are probably reading this for a person. 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