Testing ARGX-124 against a placebo for healthy volunteers
Official title: A Study to Assess the Safety of ARGX-124 in Healthy Volunteers
A Phase 1, Randomized, Double-Blinded, Placebo-Controlled Study to Investigate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Single and Multiple Ascending Doses of ARGX-124 in Healthy Adult Participants
- Phase 1
- 2 groups
- One site, in Montreal
- Recruiting
Interventions
- Biological therapy
ARGX-124
Administrations of ARGX-124
- Other intervention
Placebo
Administrations of placebo comparator
Canadian Sites (1)
1 of 1 recruiting
- Recruiting
Altasciences
Montreal
Eligibility Criteria
See who this study is looking for7 criteria
The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.
Inclusion
- +Is at least the local legal age of consentInformed consentThe process of being told what taking part involves, then choosing freely.Read more → and aged 18 to 65 years, inclusive, when signing the ICF.
- +Has a body weight between 50 and 120 kg and a BMI between 18 and 30.5 kg/m2, inclusive.
- +Is a female of Nonchildbearing Potential (postmenopausal or surgically sterilized) or a male.
Exclusion
- −Has any current or past clinically meaningful medical or psychiatric condition that, in the investigatorPrincipal investigatorThe doctor or researcher responsible for running the study at a site.Read more →'s opinion, would confound the study results or put the participant at undue risk.
- −Has IgG levels \<6.0 g/L at screeningScreeningThe checks done before joining, to see whether a study fits.Read more →.
- −Has a history of an immunosuppressive disease or an immunosuppressive condition at screening.
- −Previously participated in an ARGX-124, ARGX-213, or efgartigimod clinical study and received at least 1 dose of the study drug.
In plain language
Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.
What this study is
This study is testing a treatment for a condition.
Phase 1Phase 1The earliest stage of human testing, in a small group, focused on safety.Read more → — an early safety study in a small group, checking how it is tolerated and at what dose.
From the trial registry
Built from these fields:
- designModule.designInfo.primaryPurpose
- designModule.phases
Who receives what
There are 2 groups in this study.
Group A receives ARGX-124.
Registry label: A: ARGX-124
Group B, the placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group, receives Placebo.
Registry label: B: Placebo
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].label
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
How the study is run
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
From the trial registry
Built from these fields:
- designModule.designInfo.allocation
- designModule.designInfo.maskingInfo.masking
Is there a placebo?
One group receives a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → — a dummy treatment with no active medicine in it.
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
Who the study is looking for
The study lists an age range of 18 years to 65 years.
The study is open to people of any sex.
The study accepts healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more → as well as people with the condition.
These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.
From the trial registry
Built from these fields:
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How big and how long
The study aims to enrol about 104 people.
The study is currently expected to finish around December 2026.
The main measurement is taken over: Up to 23 weeks.
From the trial registry
Built from these fields:
- designModule.enrollmentInfo.count
- statusModule.completionDateStruct.date
- outcomesModule.primaryOutcomes[].timeFrame
What the study measures
Incidence of AEs, SAEs and AEs leading to ARGX-124 discontinuation — measured over Up to 23 weeks.
From the trial registry
Built from these fields:
- outcomesModule.primaryOutcomes[].measure
- outcomesModule.primaryOutcomes[].timeFrame
Source: NCT07377396 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.
Not medical advice. What do these terms mean?
What is being tested — in plain terms
About ARGX-124Biological
Administrations of ARGX-124
From the trial registry — its own words, unedited.
What a biological is here: A treatment made from or by living systems — such as antibodies, vaccines, or cell-based therapies.
Read the full explanation → · in clinical review
About PlaceboOther
Administrations of placebo comparator
From the trial registry — its own words, unedited.
What a other is here: An intervention the registry did not place in another category.
Read the full explanation → · in clinical review
Common questions
Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.
Am I eligible for this trial?
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.
What the study lists: an age range of 18 years to 65 years.
The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.
The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.eligibilityCriteria
Is there a placebo?
Yes. This study includes a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group — a dummy treatment with no active medicine in it.
From the trial registry
- armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
From the trial registry
- designModule.designInfo.maskingInfo.masking
- designModule.designInfo.allocation
Who can join?
The study lists an age range of 18 years to 65 years.
It is open to people of any sex.
It accepts healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more → as well as people with the condition.
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How long would this take?
The study's main measurement is taken over: Up to 23 weeks.
The study as a whole is currently expected to finish around 2026-12-31.
How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.
From the trial registry
- outcomesModule.primaryOutcomes[].timeFrame
- statusModule.completionDateStruct.date
How many people are taking part?
The study aims to enrol about 104 people.
From the trial registry
- designModule.enrollmentInfo.count
Where is this happening?
This study lists one location: Montreal, Canada.
Sites can open and close during a study, so confirm with the team before travelling.
From the trial registry
- trial_locations
About This Trial
This study aims to assess the safety of ARGX-124 in healthy adults. Another aim is to measure the amount of ARGX-124 in the blood over time to learn how it acts and moves in the body and how the immune system responds to it. Participants will remain in the study for up to approximately 23 weeks.
Think this trial might be right for you?
Complete a quick intake form and we will match you with this and other relevant trials based on your medical profile.
See if this trial could fit youThis page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.