A Study of MHB042C in Patients With Advanced Solid Tumors

Not Applicable

Recruiting

• Conditions: Advanced Malignant Solid Tumor
• Interventions: Drug: MHB042C for Injection

• Registration Number: NCT07192107
• Lead Sponsor: Minghui Pharmaceutical (Hangzhou) Ltd

Brief Summary

This is a first-in-human, open-label, multicenter Phase I/II study of MHB042C in patients with advanced solid tumors. The study was designed to evaluate the safety, tolerability, pharmacokinetics (PK), and preliminary efficacy of MHB042C monotherapy.

Detailed Description

This first-in-human clinical trial of MHB042C comprises two parts: a dose escalation phase and a dose expansion phase. The dose escalation phase is an open-label, multicenter study including dose escalation and PK expansion cohorts. The primary objectives are to evaluate the safety, tolerability, pharmacokinetics, and preliminary antitumor activity of MHB042C in patients with advanced solid tumors, and to determine the maximum tolerated dose (MTD). In this phase, additional patients may be enrolled in the PK expansion part at dose levels that have completed DLT (dose-limiting toxicity) evaluation.

Based on the safety, PK, and preliminary efficacy data from the completed DLT-evaluated dose levels, the sponsor will initiate the dose expansion phase. This phase is an open-label, multicenter, multi-cohort study designed to further evaluate the safety and efficacy of MHB042C monotherapy in patients with specific types of advanced solid tumors.

Study Timeline

• Status Verified: 2025-09
• Study First Submitted: 2025-09-17
• Study First Submitted QC: 2025-09-17
• Last Update Submitted: 2025-09-17
• Study First Posted: 2025-09-25
• Last Update Posted: 2025-09-25
• Study Start: 2025-10-01
• Primary Completion: 2029-10
• Study Completion: 2029-10-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 200

Inclusion Criteria

1. Voluntarily agrees to participate in the study and signs the informed consent form.
2. Age ≥ 18 years, no restriction on gender.
3. Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
4. Estimated life expectancy ≥ 3 months.
5. Histologically or cytologically confirmed advanced solid tumors that are refractory to standard therapy, intolerant to standard therapy, or have no standard treatment options.
6. At least one measurable lesion per RECIST v1.1 criteria or one bone.
7. Adequate bone marrow reserve and organ function. -

Exclusion Criteria

1. History of ≥2 primary malignancies within 5 years prior to informed consent.
2. Received chemotherapy within 3 weeks, radiotherapy within 4 weeks, or biologic, endocrine, or immunotherapy within 4 weeks before first study dose.
3. Medication of other unmarketed investigational drugs or therapies within 4 weeks before the first dose of investigational drug.
4. Brain metastases, bone marrow metastases, leptomeningeal disease, brainstem metastases, or spinal cord compression.
5. Severe bone damage caused by bone metastasis of prostate cancer.
6. Has adverse reactions from previous anti-tumor treatment that have not recovered to ≤ CTCAE 5.0 Grade 1.
7. Severe lung disease affecting pulmonary function.
8. Vaccinated within 4 weeks before dosing.
9. Active systemic infection requiring treatment within 7 days before dosing.
10. Serious cardiovascular or cerebrovascular diseases.
11. Uncontrolled third-space effusions not suitable for enrollment.
12. Significant bleeding, bleeding tendency, or non-healing wounds within 1 month before first dose.
13. Known hypersensitivity or delayed allergic reaction to the investigational product or its components.
14. Drug abuse or other medical/psychiatric condition that may interfere with study participation or results.
15. Known alcohol or drug dependence.
16. Pregnant or breastfeeding women, or individuals planning to conceive. -

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SEQUENTIAL

Arm && Interventions

Group	Intervention	Description
MHB042C (Phase I: Dose escalation)	MHB042C for Injection	There are seven escalating dose cohorts.
MHB042C (Phase II: Dose expansion)	MHB042C for Injection	The recommended dose from the dose-escalation stage and other potential doses will be further explored.

Primary Outcome Measures

Name	Time	Method
(Dose-Escalation Stage): Dose-Limiting Toxicity (DLT) and Maximum tolerated dose (MTD) for MHB042C	Up to day 21 from the first dose for Q3W administration.	To determine the MTD for further evaluation of IV administration of MHB042C monotherapy in subjects with advanced solid tumors.
(Dose-Expansion Stage): Objective tumor response (ORR) determined by investigators according to RECIST v1.1	Baseline up until documented progressive disease, death, lost to follow-up, or withdrawal by the participant, up to approximately 5 years	To determine the recommended Phase II dose (RP2D) of MHB042C for the treatment of selected patients with advanced solid tumors based on the safety and efficacy results from all enrolled subjects.

Secondary Outcome Measures

Name	Time	Method
Duration of response (DOR) determined by investigators according to RECIST v1.1	Baseline up until documented progressive disease, death, lost to follow-up, or withdrawal by the participant, up to approximately 5 years	DoR was defined as the period from the first occurrence of CR or PR to PD or death from any cause. If no PD or death after CR/PR, the cut-off date of progression-free survival (PFS) would be used \[Confirmed CR/PR assessment require at least one repeat (≥4 weeks)\].
Disease control rate (DCR) determined by investigators according to RECIST v1.1	Baseline up until documented progressive disease, death, lost to follow-up, or withdrawal by the participant, up to approximately 5 years	Objective tumor response for target lesions will be assessed by imaging/measurement compared with the overall tumor burden at baseline (Day -28 to -1). DCR was evaluated by the number of participants with best overall response of CR, PR and stable disease (SD) \[Confirmed CR/PR assessment require at least one repeat (≥4 weeks); SD shall be assessed at least 5 weeks after the first dose\].
Overall survival (OS)	Baseline up until death up to approximately 5 years	OS was defined as the time from random assignment or first dose to death from any cause.
Incidence and severity of adverse events (AEs), serious adverse events (SAEs), AEs leading to treatment suspension, discontinuation	Baseline up until documented progressive disease, death, lost to follow-up, or withdrawal by the participant, up to approximately 5 years.	AE assessed by investigator exclusively related to subject's underlying disease or medical condition \[graded according to the NCI Common Terminology Criteria for Adverse Events (CTCAE), Version 5.0\].
Pharmacokinetic (PK) parameters of total antibody, ADC, and free toxin at various time points	From pre-dose to 22 days after the first dose.	The PK parameters at different time points include: Maximum Plasma Concentration (Cmax)
Immunogenicity	From pre-dose to 30 days post end of treatment.	Proportion of subjects who develop anti-MHB042C antibodies (ADA).

Trial Locations

Locations (1)

Guangdong Provincial People's Hospital; 🇨🇳 Guangzhou, Guangdong, China