Safety, Pharmacokinetics, Pharmacodynamics and Preliminary Efficacy of MT-304 in Adults With Advanced HER2-Expressing Solid Tumors

NCT ID: NCT07334119

Last Updated: 2026-01-29

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE1

Total Enrollment

60 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-01-31

Study Completion Date

2028-03-30

Brief Summary

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This clinical trial is designed to evaluate the safety, pharmacokinetics, pharmacodynamics, and preliminary efficacy of MT-304 in adults with advanced HER2-expressing solid tumors. The main questions it aims to answer are:

* What is the safety profile of MT-304 when administered alone or with nivolumab?
* What is the recommended Phase 2 dose (RP2D) of MT-304?

Participants will:

* Receive MT-304 alone (every 14 days) or with nivolumab (every 28 days).
* Attend regular clinic visits for assessments and monitoring.
* Continue treatment until disease progression, unacceptable toxicity, or study discontinuation.

Detailed Description

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This multicenter, open-label, Phase 1 trial is designed to assess the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary efficacy of MT-304 in adults aged 18 and older with advanced HER2-expressing solid tumors.

The study consists of two treatment modules:

* Module 1 (Monotherapy): Participants receive MT-304 every 14 days for 28-day cycles, with dosing adjustments based on clinical benefit and safety evaluations.
* Module 2 (Combination Therapy): Participants receive MT-304 in combination with nivolumab, administered every 14 days and 28 days, respectively, also allowing for dosing adjustments.

The Bayesian Optimal Interval (BOIN) design will guide dose escalation, overseen by a Safety Review Committee to establish the recommended Phase 2 dose (RP2D).

Regular assessments, including vital signs and laboratory tests, will monitor safety and efficacy throughout the trial, with follow-up visits for up to 2 years post-treatment.

Conditions

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HER2-Expressing Solid Tumors

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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MT-304 Monotherapy

Participants receive MT-304 administered intravenously once every 14 days (Q14D) in escalating dose levels.

Group Type EXPERIMENTAL

MT-304

Intervention Type DRUG

Safety, tolerability, and pharmacokinetics will be evaluated.

MT-304 + Nivolumab Combination Therapy

Participants receive MT-304 administered intravenously once every 14 days (Q14D) in combination with nivolumab as "per local label" administered once every 28 days (Q28D).

Group Type EXPERIMENTAL

MT-304 + Nivolumab

Intervention Type DRUG

Combination therapy begins after monotherapy dose clearance by the Safety Review Committee.

Interventions

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MT-304

Safety, tolerability, and pharmacokinetics will be evaluated.

Intervention Type DRUG

MT-304 + Nivolumab

Combination therapy begins after monotherapy dose clearance by the Safety Review Committee.

Intervention Type DRUG

Other Intervention Names

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mRNA-LNP mRNA-LNP

Eligibility Criteria

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Inclusion Criteria

* Aged 18 years or above
* Histologically confirmed diagnosis of metastatic or advanced epithelial cancer expressing HER2 (Note: Participants with other tumor types expressing HER2 may be considered pending discussion with the Medical Monitor).
* Measurable lesion per RECIST 1.1 criteria.
* Eastern Cooperative Oncology Group (ECOG) performance status Grade of 0 or 1.
* Adequate Organ function

Exclusion Criteria

* Known active CNS metastasis and/or carcinomatous meningitis.
* Any acute illness including fever.
* History of symptomatic congestive heart failure
* History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.
* Uncontrolled pleural effusion, pericardial effusion, or ascites
* Active autoimmune disease not related to prior therapy for primary malignancy that has required systemic therapy in the last 1 year.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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CREATE Medicines

UNKNOWN

Sponsor Role collaborator

Myeloid Therapeutics

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Matthew Maurer, MD

Role: STUDY_DIRECTOR

Myeloid Therapeutics

Locations

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Calvary Mater Newcastle

Waratah, New South Wales, Australia

Site Status RECRUITING

Scientia Clinical Research Ltd

Randwick, New South Wales (nsw), Australia

Site Status RECRUITING

Linear Clinical Research

Nedlands, Western Australia, Australia

Site Status RECRUITING

Countries

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Australia

Central Contacts

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Project Manager

Role: CONTACT

+61 7 3137 6255

Clinical Department

Role: CONTACT

+1 617 465 1022

Facility Contacts

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Kerrie Cornall

Role: primary

+61240143282

Dr Charlotte Lemech

Role: primary

Role: primary

+61 (0) 8 6382 5100

Other Identifiers

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MTX-HER2-304

Identifier Type: -

Identifier Source: org_study_id

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