NCT06401213

A First-in-Human Safety Trial of MTX-463

MTX-463-I101: A Phase 1 Randomized, Double-Blind, Dose-Escalating Study to Assess the Safety, Tolerability, and Pharmacokinetics of MTX-463 in Healthy Adults

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 56 (actual)
• Sponsor: Mediar Therapeutics · Industry
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

Summary

A randomized, double-blind, placebo-controlled, single ascending dose (SAD) and multiple ascending dose (MAD) study to assess the safety, tolerability, and PK of single and multiple ascending doses of MTX-463 administered in healthy adults.

Detailed description

This is a randomized, double-blind, placebo-controlled, single ascending dose (SAD) and multiple ascending dose (MAD) study to assess the safety, tolerability, and PK of single and multiple ascending doses of MTX-463 administered in healthy adults. SAD Portion The SAD portion of the study will consist of 4 planned dosing cohorts each comprising 8 healthy participants. The starting dose will be 4 mg/kg (Cohort 1) with subsequent planned doses of 8 mg/kg (Cohort 2), 16 mg/kg (Cohort 3), and 30 mg/kg (Cohort 4). Planned doses may be adjusted in response to the data. Additional participants and/or additional dosing cohorts may be added as needed based on the data. Within each cohort, participants will be randomly assigned to receive MTX-463 or matched placebo. The first 2 participants (sentinel participants) within each cohort will be randomized 1:1 to receive MTX-463 or placebo on Day 1. These participants will be monitored for 24 hours, and after review of the safety data from both participants and approval by the study Investigator and Sponsor's responsible medical officer (SRMO), the additional 6 participants will be randomized to study drug (n=5 MTX-463; n=1 placebo). Each participant will undergo assessments at specified timepoints on Days 1 through 60. End-of-Study (EOS) procedures will be completed on Day 28 or upon early termination (ET). An End-of-Follow-up (EOF) assessment of PK and ADA will be completed on Day 60. MAD Portion The MAD portion of the study will consist of 3 planned dosing cohorts. Each cohort will comprise 8 healthy participants (n=6 MTX-463; n=2 placebo). The starting dose will be a 6.6 mg/kg loading dose and 4 mg/kg maintenance doses (Cohort 1) with subsequent planned doses of a 13 mg/kg loading dose and 8 mg/kg maintenance doses (Cohort 2), and a 27 mg/kg loading dose and 16 mg/kg maintenance doses (Cohort 3). Planned doses may be adjusted in response to the data. Additional participants and/or additional dosing cohorts may be added as needed based on the data. On Day 1, participants will be randomized to receive either MTX-463 or matched placebo. The randomized participants will receive a single loading dose on Day 1 followed by 2 maintenance doses of study drug on Day 8 and Day 22. Participants will be housed inpatient from Day -1 through post-dose observation on Day 8 and from Day 21 through assessments on Day 29. All other visits will be conducted in the outpatient setting. Each participant will undergo assessments at specified timepoints on Days 1 through 82. End-of-study procedures will be completed on Day 50, or upon ET. An EOF assessment of PK and ADA will be completed on Day 82. Safety and tolerability of MTX-463 will be reviewed through Day 29 by the study Investigator and SRMO to inform dose escalation decisions for the next dose cohort. Additional cohorts for the SAD and MAD portions of the study may be added as needed to potentially explore lower doses.

Conditions

• Healthy

Interventions

Type	Name	Description
BIOLOGICAL	MTX-463	MTX-463 is an immunoglobin G1 (IgG1) monoclonal antibody directed against WNT-inducible signaling pathway protein 1 (WISP1). WISP1 (aka CCN-4) is a matricellular protein that appears to be upregulated locally in response to certain chronic diseases and malignancies.
OTHER	Placebo	Matching Placebo-- Normal Saline

Timeline

• Start date: 2024-04-15
• Primary completion: 2024-11-15
• Completion: 2024-11-15
• First posted: 2024-05-06
• Last updated: 2025-01-17

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study