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A Phase 1 Study to Evaluate the Safety, Pharmacokinetics, and Preliminary Efficacy of MK-6204 (SKB535) for Injection in Participants With Advanced Solid Tumors

A Phase 1 Study to Evaluate the Safety, Pharmacokinetics, and Preliminary Efficacy of MK-6204 (SKB535) for Injection in Participants With Advanced Solid Tumors

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06726369
Enrollment
90
Registered
2024-12-10
Start date
2024-12-12
Completion date
2029-12-31
Last updated
2026-05-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Advanced Solid Tumors

Keywords

ADC, safety, tolerability, pharmacokinetics

Brief summary

This is an open-label, nonrandomized, multicenter, Phase 1 study to evaluate the safety, tolerability, pharmacokinetics, and preliminary antitumor activity of MK-6204 as monotherapy in participants with advanced solid tumors.

Detailed description

This is an open-label, nonrandomized, multicenter, Phase 1 study to evaluate the safety, tolerability, pharmacokinetics, and preliminary antitumor activity of MK-6204 as monotherapy in participants with advanced solid tumors. The primary objectives are to evaluate the safety and tolerability of MK-6204. The secondary endpoints include PK parameters, ORR, DOR, and immunogenicity of MK-6204. The study will include a Screening Phase, a Treatment Phase, and a Post-treatment Follow up Phase.

Interventions

DRUGMK-6204 (SKB535) for Injection

MK-6204 (SKB535) for injection is administered every 3 weeks (q3w) until radiographic disease progression (PD), intolerable toxicity, death, or discontinuation of treatment, whichever occurs first.

Sponsors

Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. ≥ 18 years of age 2. Have a histologically or cytologically confirmed advanced/metastatic solid tumor by pathology report and have failed or do not have available standard treatments. The tumor types will be limited to: CRC; Gastric carcinoma or gastroesophageal junction (GEJ) adenocarcinoma; Esophageal carcinoma; Pancreatic cancer; NSCLC; Cervical carcinoma; Head and Neck squamous cell carcinoma. 3. Have measurable disease by RECIST 1.1 as assessed by the local site investigator/radiology. Target lesions situated in a previously irradiated area are considered measurable if progression has been shown in such lesions. 4. Have a performance status of 0 or 1 on the ECOG Performance Scale. 5. The participant has provided documented informed consent for the study. 6. Participants who agree to provide archival tumor tissue sample or newly obtained core, incisional, or excisional biopsy of a tumor lesion not previously irradiated. 7. Participants who have AEs due to previous anticancer therapies must have recovered to ≤Grade 1 or baseline. Participants with endocrine-related AEs who are adequately treated with hormone replacement or participants who have ≤Grade 2 neuropathy are eligible.

Exclusion criteria

1. Active severe digestive disease, including but not limited to complete or incomplete gastric outlet obstruction, persistent/recurrent vomiting, severe gastrointestinal hemorrhage, gastric or duodenal ulcers, acute gastrointestinal perforation, acute necrotizing pancreatitis, ulcerative enteritis, congenital megacolon, or Crohn's disease. 2. Participants with a history of interstitial lung disease (ILD) or a history of noninfectious pneumonitis that required steroids, have current ILD/pneumonitis, or where suspected ILD/pneumonitis cannot be ruled out by imaging at screening. 3. Received strong cytochrome P450 (CYP3A4) inhibitors or inducers within 2 weeks prior to the first dose of study intervention or within 5 half-lives of drug elimination, whichever is longer. 4. Received strong breast cancer resistance protein (BCRP) inhibitors within 2 weeks prior to the first dose of study intervention or within 5 half-lives of drug elimination, whichever is longer. 5. Received prior systemic anticancer therapy including investigational agents within 4 weeks or 5 half-lives, whichever is shorter, before intervention allocation. 6. Known additional malignancy that is progressing or has required active treatment within the past 2 years. 7. Known active CNS metastases and/or carcinomatous meningitis. Participants with previously treated brain metastases may participate provided they are radiologically stable (i.e., without evidence of progression) for at least 4 weeks as confirmed by repeat imaging performed during the study screening, are clinically stable and have not required steroid treatment for at least 14 days before the first dose of study intervention.

Design outcomes

Primary

MeasureTime frameDescription
Dose Limiting Toxicities (DLT)From the date of first dose until up to 21 days of interventionDLT is defined as an adverse event (AE) that meets protocol defined DLT criteria during the evaluation period and is at least possibly related to study drug.
Adverse Event (AE)From the date of first dose until up to 30 days after the last dose of interventionAn AE is defined as any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether considered related to the study intervention.
Serious Adverse Event (SAE)From the date of first dose until up to 30 days after the last dose of interventionAn SAE is defined as any serious untoward medical occurrence that meets the pre-specified criteria in the protocol

Secondary

MeasureTime frameDescription
PK parameter AUCThrough study completion, an average of 2 yearsPK parameter AUC after single and multiple doses
PK parameter CmaxThrough study completion, an average of 2 yearsPK parameter Cmax after single and multiple doses
PK parameter CminThrough study completion, an average of 2 yearsPK parameter Cmin after single and multiple doses
Objective response rate (ORR)Through study completion, an average of 2 yearsORR refers to the proportion of participants who have achieved confirmed complete response (CR) or partial response (PR).
Duration of response (DOR)Through study completion, an average of 2 yearsDOR refers to the time from the first documented evidence of CR or PR until disease progression or death due to any cause, whichever occurs first.
Immunogenicity of MK-6204Through study completion, an average of 2 yearsADA incidence

Countries

China

Contacts

CONTACTLin Shen
linshenpku@163.com010-88196561

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 8, 2026