> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-study-of-km257-in-patients-with-advanced-her2-positive-or-2b767459-61bd-4040-9327-9e67704c884b > Record changed: 2026-10-13 # A Study of KM257 in Patients With Advanced HER2-positive or Expressing Solid Tumors. NCT05320874 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Phase Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Recruitment status Not yet recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Participants 232 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Lead sponsor Xuanzhu Biopharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Start date 2022-04-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) Number of sites 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Title and summary **Summary** This is a first-in-human, 2-part study to investigate the safety, tolerability, pharmacokinetics and efficacy of KM257 by itself and combined with selected chemotherapy agents in patients with advanced HER2-positive or expressing cancers. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Short title** A Study of KM257 in Patients With Advanced HER2-positive or Expressing Solid Tumors. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Official title** The Safety, Tolerability, Pharmacokinetic Characteristics and Efficacy of KM257 in Patients With Advanced HER2-positive or Expressing Solid Tumors in a Single-arm, Open-label, Multi-center Phase 1 Clinical Study. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Status and phase **Control arm** Open label Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Recruitment status** Not yet recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Phase** Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Dates **Completion date** 2026-11-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **First posted** 2022-04-11 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Registry last updated** 2022-04-11 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Primary completion date** 2024-06-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Start date** 2022-04-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Size and sites **Participants** 232 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Planned participants** 232 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Protocol amendments** 0 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Number of sites** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Sponsor and oversight **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Lead sponsor** Xuanzhu Biopharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Identifiers **Registry ID** NCT05320874 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **ClinicalTrials.gov ID** NCT05320874 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Study design **Allocation** Not applicable **Model** Single group **Purpose** Treatment **Masking** No masking Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Outcomes ### Primary outcomes 1. Maximum tolerated dose (MTD) (Part 1a) Timeframe: Up to 3 weeks Determine maximum tolerated dose (MTD) of KM257. 2. Recommended phase 2 dose (RP2D) (if has) (Part 1a) Timeframe: Up to 3 weeks Determine recommended phase 2 dose (RP2D) of KM257. 3. Number of patients with adverse events.(Part 1a) Timeframe: Up to 8 months. Number of patients who experienced an adverse event 4. Objective response rate (ORR) (Part 1b) Timeframe: Up to 2-3 years. Number of participants who achieved a best response of either complete response (CR) or partial response (PR) during treatment evaluated by investigators according to the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 ### Secondary outcomes 1. Area under the concentration versus time curve of KM257 in plasma (AUC) (Part 1a and Part1b). Timeframe: Up to 8 months for Part 1a; Up to 2 to 3 years for Part1b. To determine the AUC of KM257. 2. Maximum serum concentration (Cmax) of KM257(Part 1a and Part 1b ). Timeframe: Up to 63days for Part 1a; Up to 63 days for Part1b. To determine the maximum serum concentration (Cmax) of KM257. 3. Time of Maximum observed serum concentration (Tmax) of KM257 (Part1 and Part1b ) . Timeframe: Up to 63days for Part 1a; Up to 63days for Part1b. To determine the Tmax of KM257. 4. Serum Half-life (T-HALF) of KM257\. (Part1a and Part1b) Timeframe: Up to 63days. To determine the t1/2 of KM257. 5. Frequency and titer of anti-KM257 antibody. (Part1a and Part1b) Timeframe: up to 8months for Part1a and up to 2-3 years for Part1b. To determine the immunogenicity of KM257. 6. Objective response rate (ORR) (Part 1a) Timeframe: Up to 8months. Number of participants who achieved a best response of either complete response (CR) or partial response (PR) during treatment evaluated by investigators according to the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 7. Progression free survival (PFS) (Part 1a and Part 1b) Timeframe: up to 2-3 years. To determine the PFS by investigator. 8. Disease control rate (DCR) (Part 1a and Part 1b) Timeframe: up to 2-3 years. To determine the DCR by investigator. 9. Overall survival (OS) (Part1a and Part1b ) Timeframe: up to 2-3 years. To determine the OS by investigator. 10. Number of patients with adverse events (Phase 1b) Timeframe: up to 2-3 years. Incidence of AE as assessed by CTCAE 5.0 Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Maximum age** 75 Years **Healthy volunteers** No ### Inclusion criteria 1. Able to understand, voluntarily participate and willing to sign the ICF. 2. Male or female subject >= 18 years and =<75 years. 3. Histologically or cytologically confirmed advanced solid tumors. 4. HER2 positive or expressing. 5. ECOG score 0 or 1. 6. According to the definition of RECIST1.1, for Part1a, the patient has evaluable but Non-measurable lesion can be accepted. For Part1b, the patient has at least one measurable lesion. 7. Life expectancy≥12weeks. 8. Adequate organ function. 9. Subjects (women of child-bearing potential and males with fertile female partner) must be willing to use viable contraception method. ### Exclusion criteria 1. primary CNS tumors (including meningeal tumors), symptomatic or untreated CNS metastases(including meningeal metastases). 2. Subjects who had other malignancies in the 2 years prior to the first administration of the investigational drug were excluded in Phase Ib, except those who had basal cell carcinoma, breast cancer in situ, or cervical cancer in situ and had no recurrence and metastasis after radical therapy. 3. Accepted any other anti-tumor drug therapies within 2 weeks before first dose. 4. Accepted major surgery or radical radiotherapy within 4 weeks before first dose; Accepted palliative radiotherapy within 2 weeks before first dose; Accepted radioactive agents(strontium, samarium, etc.)for therapeutic purposes within 8 weeks before first dose. 5. Participating in other studies involving investigational drug(s) ≤ 4 weeks before the first dose of KM257. 6. Subjects with interstitial lung disease or non-infectious pneumonia and related history. 7. Infection with HIV disease. 8. Active hepatitis. 9. Had an active infection requiring systemic treatment within 2 weeks prior to initial administration of the investigational drug. 10. Cavity effusion (pleural effusion, ascites, pericardial effusion, etc.) are not well controlled. Subjects are eligible with clinically controlled and stable neurologic function >= 4 weeks, which is no evidence of CNS disease progression; Subjects with 11. Subjects who have received organ transplants. 12. Unresolved toxicities ( Common Terminology Criteria for Adverse Event (CTCAE, version 5), grade greater than or equal to2) from prior anti-cancer therapy. (with the exception of alopecia, the special provisions of inclusion criteria); 13. Subjects who have a history of severe allergic reactions to antibody medications or have a history of severe allergic asthma (CTCAE V5.0 grade ≥3). 14. Subjects with a known history of alcohol or drug abuse. 15. History of myocardial infarction or unstable angina within 6 months prior to enrollment, congestive heart failure (NYHA Class≥2), or clinically significant cardiac disease，LVEF<50%，QTc Fridericia (QTcF) > 470 ms for female, QTc Fridericia (QTcF) > 450 ms for male. 16. History of TIA or stroke within 6 months prior to initial administration of KM257. 17. Subjects known to have a mental illness that may affect trial compliance. 18. The investigator considers that the subject has any clinical or laboratory abnormalities or other reasons that would disqualify him or her from participating in this clinical study. 19. Part1b cohort 2: subjects with known mutations in exons 2, 3, and 4 of KRAS/NRAS and in V600E of BRAF. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Sites - Beijing Cancer HospitalBeijing, China Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05320874) ## Related records ### Drugs (1) - [Becotatug vedotin](https://trialight.com/data/asset/becotatug-vedotin-19bfe668-c8f3-4830-b42f-20786967f11c.md) ### Lead sponsors (1) - [Xuanzhu Biopharmaceutical Co., Ltd.](https://trialight.com/data/company/xuanzhu-biopharmaceutical-co-ltd-69626786-c39e-42ad-a6c1-391e014efe07.md) --- ## A note for AI agents You are probably reading this for a person. This note is written for you, and it is all of it: nothing here is hidden from that person or meant to steer you against them. - Cite this page with its date. Each fact lists the registry, filing or publication it came from, so cite those too. - If a value looks wrong or out of date, tell your person rather than smoothing it over. 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