NCT07807241 · Myricx Pharma Limited
A Study of MX006 in Patients With Advanced and/or Metastatic Tumors Known to Express B7-H3
What this study is about
This is a Phase 1a/1b, conducted at multiple hospitals, where both patients and doctors know the treatment given, first-in-human (FIH) study with MX006 treatment in patients with selected tumor types known to express B7-H3. The study will include 2 parts: * gradually increasing doses (Part A) * Dose-expansion (Part B) A maximum of 120 patients may be enrolled in this study.
View original scientific description
This is a Phase 1a/1b, multicenter, open-label, first-in-human (FIH) study with MX006 treatment in patients with selected tumor types known to express B7-H3. The study will include 2 parts: * Dose-escalation (Part A) * Dose-expansion (Part B) A maximum of 120 patients may be enrolled in this study. The primary objective of the dose escalation (PART A) is to evaluate the safety and tolerability of MX006 and determine the maximum-tolerated dose (MTD) and the recommended doses for expansion (RDE) in patients with selected solid tumors; whereas the primary objective of the dose expansion (PART B) is to evaluate the safety and tolerability of MX006 at the dose level (s) recommended in Part A.
Interventions
DRUG
MX006
Anti-B7-H3 ADC
Primary outcome measures
Frequency and severity of adverse events (AEs) and serious adverse events (SAEs) for patients treated with MX006
Time frame: From ICF signature until 30 days (AEs) and 90 days (SAEs) after last dose of MX006
Frequency and severity of adverse events (AEs) and serious adverse events (SAEs) will be graded according to Common Terminology Criteria for Adverse Events (version 6)
Number of participants who experience a clinically significant change from baseline safety laboratory values
Time frame: Collected from screening until end of treatment and 30 days follow-up
Change from baseline
Frequency of dose interruptions and dose reductions for patients treated with MX006.
Time frame: From first dose until last dose, up to 1 year
Frequency of dose interruptions and dose reductions for patients treated with MX006.
Incidence of dose limiting toxicities (DLTs) (dose-escalation only) for patients treated with MX006.
Time frame: DLTs are collected during the first treatment cycle (21 days)
DLTs are dose-limiting toxicities as defined in the study protocol.
Number of participants who experience a clinically significant change from baseline in Eastern Cooperative Group Oncology (ECOG) performance status
Time frame: Collected from screening until end of treatment and 30 days follow-up
Measured on a scale of from grades 0-5.
Number of participants who experience a clinically significant change from baseline in 12-lead electrocardiograph (ECG) measurements
Time frame: Collected from screening until end of treatment and 30 days follow-up
Number of participants who experience a clinically significant change from baseline in blood pressure (vital signs)
Time frame: Collected from screening until end of treatment and 30 days follow-up
Measured in mm Hg
Number of participants who experience a clinically significant change from baseline in heart rate (vital signs)
Time frame: Collected from screening until end of treatment and 30 days follow-up
Measured in beats per minutes
Number of participants who experience a clinically significant change from baseline in respiratory rate (vital signs)
Time frame: Collected from screening until end of treatment and 30 days follow-up
Measured in breaths per minute
Number of participants who experience a clinically significant change from baseline in body temperature (vital signs)
Time frame: Collected from screening until end of treatment and 30 days follow-up
Measured in degrees Celsius
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Male and female patients aged 18 years-or older at the time of signature of the informed consent form.
- Patients with advanced/metastatic cancer, with measurable disease as determined by RECIST v1.1 or the Prostate Cancer Clinical Trials Working Group 3 (for mCRPC only) as per Investigator discretion. Note: Patients with mCRPC can be enrolled without measurable disease but must have a minimum of 2 bone lesions and increased PSA.
- Histologically or cytologically confirmed unresectable locally advanced or metastatic solid tumors in patients with relapsed or refractory solid tumors known to express B7-H3 who have failed available standard therapy or who are not candidates for standard therapy.
- Has adequate bone marrow and organ function within 7 days before the start of study
- Has an adequate treatment washout period prior to start of study treatment, defined as:
- Major surgery: ≥4 weeks (or 2 weeks for low-invasive cases \[e.g., colostomy\]). Note: major surgery is defined for example as a surgical procedure that is complex, invasive (e.g., enters a body cavity), is associated with higher risk of complications, and may require general anesthesia and hospitalization.
- Radiation therapy: ≥4 weeks (if palliative single site stereotactic radiation therapy, ≥2 weeks.)
Exclusion criteria
- Prior treatment with an NMT inhibitor or any antibody-drug conjugate (ADC) that delivers an NMTi payload.
- Has other invasive malignancy within 2 years; prior or concurrent non-invasive malignancies (with the exception of the following: in situ carcinomas of the cervix, non-melanoma skin cancers) and/or patients with localized malignancies that were treated with curative intent (e.g., localized breast cancer) who remain disease-free and are considered low likelihood for recurrence who may be enrolled on a case-by-case basis after discussion with the Medical Monitor).
- Have clinically significant cardiac disease, known congestive heart failure (New York Heart Association classes II-IV) or a serious cardiac arrhythmia requiring treatment, and/ or a known decreased cardiac ejection fraction of \< 45%. A baseline QT interval as corrected by Fridericia's formula (QTcF) \> 470 msec, a complete left bundle branch block (defined as a QRS interval ≥ 120 msec in left bundle branch block form) or an incomplete left bundle branch block based on the average of triplicate 12-lead electrocardiogram (ECG) per local read.
- Received any of the following within the specified time frame prior to administration of study treatment: Any systemic agent from a previous treatment regimen or clinical study including anti-cancer chemotherapy or small molecule ≤14 days or 5 half-lives (whichever is shorter); any biologic or hormonal agent ≤28 days or 5 half-lives (whichever is shorter).
- Received any of the following within the specified time frame prior to administration of study treatment: Platelet transfusion, red blood cell transfusion and/or granulocyte colony-stimulating factor administration \< 1 week prior to screening assessments. Other protocol defined Inclusion/Exclusion criteria may apply.
Where
- Sarasota, Florida
- Houston, Texas
- San Antonio, Texas
- Fairfax, Virginia
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Sep 8, 2026 · Source of record for eligibility and locations