Actively Recruiting

Phase 1
Age: 18Years - 65Years
All Genders
Healthy Volunteers
ID06877611

A Phase 1, Randomized, Placebo-Controlled, Double-Blind, Single and Multiple Ascending Dose Trial of S-4321 in Healthy Volunteers

Led by Seismic Therapeutic AU Pty Ltd · Updated on 2025-04-15

96

Participants Needed

1

Research Sites

N/A

Total Duration

On this page

Sponsors

S

Seismic Therapeutic AU Pty Ltd

Lead Sponsor

A

Avance Clinical Pty Ltd.

Collaborating Sponsor

AI-Summary

What this Trial Is About

Researchers are evaluating S-4321 in this first-in-human, phase 1 clinical trial to gather information on its safety, tolerability, and how the body processes and responds to it. The study involves healthy adult volunteers and aims to provide initial data on potential effects and biological activity of S-4321 compared to a placebo. This randomized, double-blind, placebo-controlled study is sponsored by Seismic Therapeutic AU Pty Ltd and includes two parts to test different dosing schedules. The trial has two parts: Part 1 where participants receive single ascending doses of S-4321 or placebo, and Part 2 where participants receive multiple ascending doses, administered either subcutaneously or intravenously. This design allows researchers to carefully monitor how the drug behaves in the body at different dose levels and over time. Both S-4321 and placebo are given under controlled conditions during these periods. Participants are closely monitored through various safety assessments and laboratory tests over about two months. The main focus is on any treatment-related adverse events. Researchers will also measure how much of the drug enters the bloodstream, how long it stays, and how it affects receptor occupancy. Additional evaluations include antibody response against the drug. Participants must be available for the entire study period and follow-up to ensure complete data collection.

CONDITIONS

Brief Title

A Phase 1 Study of S-4321

Who Can Participate

Age: 18Years - 65Years
All Genders
Healthy Volunteers

Eligibility Criteria

Eligible

You may qualify if you...

  • Available for the entire duration of the study and follow-up
  • Willing and able to comply with all study assessments and protocol schedule
  • Voluntarily consents by signing the informed consent form
  • Body mass index (BMI) between 18 and 32 kg/m2, inclusive, and weighs at least 45 kg
  • In good physical and mental health as determined by the Investigator or delegate
Not Eligible

You will not qualify if you...

  • History of severe allergic or anaphylactic reaction
  • Pregnant, nursing, or planning to become pregnant or breastfeed during the trial
  • Known immunodeficiency disorder
  • History of malignancy or confirmed cervical dysplasia
  • History of HIV or positive HIV test at screening
  • Positive laboratory evidence for active hepatitis at screening
  • Any condition or prior therapy that may compromise safety, compliance, or study completion as judged by the Investigator or delegate
  • Other inclusion/exclusion criteria apply

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Run-in Period

Duration - Up to several days depending on dosing cohort

Participants receive a single ascending dose of the study drug or placebo to assess safety and tolerability.

1 to multiple visits depending on cohort assignment

Treatment

Duration - Up to 2 months

Participants receive multiple ascending doses of the study drug or placebo to assess safety, tolerability, and pharmacokinetics.

Weekly visits for up to 8 weeks

Follow-up

Duration - Up to 2 months after final dose

Participants are monitored for safety and potential adverse events after treatment completion.

1 to 2 follow-up visits

Trial Site Locations

Total: 1 location

1

Veritus Research

Bayswater, Victoria, Australia

Actively Recruiting

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Research Team

S

Seismic Contact

How is the study designed?

Study Type

INTERVENTIONAL

Masking

DOUBLE

Allocation

RANDOMIZED

Model

PARALLEL

Primary Purpose

TREATMENT

Number of Arms

2

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