Efficacy and Safety Study of Efgartigimod in Adults With Post-COVID-19 POTS

NCT ID: NCT05633407

Last Updated: 2025-05-23

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 53 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-09-23
• Study Completion Date: 2024-04-18

Brief Summary

The study aims to investigate the safety, tolerability, efficacy, pharmacodynamics (PD), pharmacokinetics (PK), and immunogenicity of efgartigimod compared to placebo in participants with post-COVID-19 postural orthostatic tachycardia syndrome (POTS) (post-COVID-19 POTS).

Detailed Description

The study aims to investigate the safety, tolerability, efficacy, pharmacodynamics (PD), pharmacokinetics (PK), and immunogenicity of efgartigimod compared to placebo in participants with post-COVID-19 postural orthostatic tachycardia syndrome (POTS) (post-COVID-19 POTS). Efgartigimod may be a viable treatment option for individuals diagnosed with post-COVID-19 POTS because it has been shown to reduce IgG levels, including IgG autoantibodies, which may underlie some of the autonomic disease manifestations in these patients.

Conditions

Postural Orthostatic Tachycardia Syndrome

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

Efgartigimod

Receive efgartigimod IV 10mg/kg during weekly infusions during a treatment period of 24 weeks

Group Type: EXPERIMENTAL

Efgartigimod

Intervention Type: DRUG

Efgartigimod IV 10 mg/kg infusion qw for 24 weeks. Participants will be randomized to receive efgartigimod IV 10 mg/kg or matching placebo in a 2:1 ratio, respectively

Placebo

Receive a matching placebo during weekly infusions during a treatment period of 24 weeks

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

Receive a matching placebo during weekly infusions during a treatment period of 24 weeks.

Participants will be randomized to receive efgartigimod IV 10 mg/kg or matching placebo in a 2:1 ratio, respectively

Interventions

Efgartigimod

Efgartigimod IV 10 mg/kg infusion qw for 24 weeks. Participants will be randomized to receive efgartigimod IV 10 mg/kg or matching placebo in a 2:1 ratio, respectively

Intervention Type: DRUG

Placebo

Receive a matching placebo during weekly infusions during a treatment period of 24 weeks.

Participants will be randomized to receive efgartigimod IV 10 mg/kg or matching placebo in a 2:1 ratio, respectively

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Reached the age of consent when signing the informed consent form

2. Capable of providing signed informed consent and complying with protocol requirements

3. Diagnosed with new-onset POTS post-COVID-19 established by the following:

1. History of COVID-19 based on a previous positive test result from either laboratory-confirmed COVID-19 test (eg, a PCR test) or non-laboratory-confirmed COVID-19 test (eg, rapid antigen test); this positive result may be either documented or patient-reported

2. Tilt table or orthostatic vital sign measurements during screening consistent with consensus criteria: sustained HR increase of ≥30 bpm within 10 min of standing or head up tilt (≥40 bpm for individuals aged 18 to 19 years) and/or HR reaching >120 bpm within 10 min; absence of sustained 20 mmHg decrease in systolic blood pressure (SBP)

3. Ongoing symptoms of POTS confirmed by the investigator with at least 3 symptoms in each of the following areas lasting longer than 12 weeks after either diagnosis of COVID-19 or after hospital discharge for COVID-19:

i. Vasomotor symptoms: fatigue, orthostatic intolerance, brain fog, exertional dyspnea, difficulty with concentration, venous pooling, and exercise intolerance ii. Sympathetic over-compensation symptoms: palpitation, heat intolerance, nausea with or without vomiting, insomnia, anxiety, lack of appetite, chest pain, and diaphoresis

4. COMPASS 31 ≥35 at screening

5. Agree to use contraceptives consistent with local regulations regarding the methods of contraception for those participating in clinical studies and the following:

Male participants: No male contraception is required Female participants of childbearing potential must have a negative serum pregnancy test at screening and a negative urine pregnancy test at baseline before receiving IMP. Contraceptive requirements.

6. Body mass index (BMI) <35 kg/m2

Exclusion Criteria

1. Diagnosis of or receiving treatment for the following conditions before COVID-19: peripheral neuropathy, POTS, myalgic encephalomyelitis encephalitis/chronic fatigue syndrome, Ehlers Danlos syndrome confirmed by genetic testing, autonomic neuropathy, multiple sclerosis, stroke, spinal cord injury, or any known lesions in the central nervous system by imaging or neurological exam

2. History of or currently being treated for clinically significant ongoing cardiac arrythmia, heart failure, myocarditis, pulmonary embolism requiring anticoagulation, pulmonary fibrosis, or critical illness-related polyneuropathy or myopathy

3. Known autoimmune disease that, in the investigator's judgment, would interfere with an accurate assessment of clinical symptoms of post-COVID-19 POTS or puts the participant at undue risk

4. Known HIV disease or common variable immunodeficiency

5. History of malignancy unless considered cured by adequate treatment with no evidence of recurrence for ≥3 years before the first administration of IMP. Adequately-treated participants with the following cancers may be included at any time:

1. Basal cell or squamous cell skin cancer

2. Carcinoma in situ of the cervix

3. Carcinoma in situ of the breast

4. Incidental histological finding of prostate cancer (TNM stage T1a or T1b)

6. Clinically significant uncontrolled active or chronic bacterial, viral, or fungal infection or positive SARS-CoV-2 PCR test at screening

7. Positive serum test at screening for an active infection with any of the following:

1. Hepatitis B virus (HBV) that is indicative of an acute or chronic infection, unless associated with a negative HB surface antigen (HBsAg) or negative HBV DNA test

2. Hepatitis C virus (HCV) based on HCV antibody assay unless a negative RNA test is available

3. HIV

8. A medical condition that could confound the results of the study or put the participant at undue risk in the investigator's judgment

9. Clinically significant disease, recent major surgery (within 3 months of screening), or intends to have surgery during the study; or any other condition that in the opinion of the investigator could confound the results of the study or put the participant at undue risk

10. Total IgG <4 g/L at screening

11. Received within 12 weeks or 5 half-lives (whichever is longer) before screening an investigational product

12. Received within 12 weeks before screening either intravenous immunoglobulin (Ig) IV or SC or plasmapheresis/plasma exchange (PLEX)

13. Received a live or live-attenuated vaccine less than 4 weeks before screening

14. Known hypersensitivity to IMP or 1 of its excipients

15. Previously participated in an efgartigimod clinical study and received at least 1 dose of IMP

16. Currently participating in another interventional clinical study

17. History (within 12 months of screening) of or current alcohol, drug, or medication abuse

18. Pregnant or lactating or intends to become pregnant during the study

19. Unwilling to remain on a stable regimen of medications during the study

20. Unwilling to avoid initiation of new physical rehabilitation or other physician-prescribed exercise programs during the 24-week treatment period

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Iqvia Pty Ltd

INDUSTRY

Sponsor Role: collaborator

argenx

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

University of California, San Diego Sulpizio Cardiovascular Center

La Jolla, California, United States

Stanford Movement Disorder Center

Palo Alto, California, United States

Northshore University Health System

Glenview, Illinois, United States

Johns Hopkins University

Baltimore, Maryland, United States

Harvard Medical School, Brigham and Women's Hospital

Boston, Massachusetts, United States

Case Western Reserve University

Cleveland, Ohio, United States

Vandetbilt University Medical Center / Clinical Research Center

Nashville, Tennessee, United States

Apex Trials Croup, LLC

Fort Worth, Texas, United States

Texas Institute of Cardiology

McKinney, Texas, United States

Pioneer Clinical Research

Rosharon, Texas, United States

Metrodora Institute

West Valley City, Utah, United States

Countries

United States

References

Dani M, Fedorowski A. Tackling POTS Needs More Than Just a Sympathetic Approach. Hypertension. 2024 Nov;81(11):2248-2250. doi: 10.1161/HYPERTENSIONAHA.124.23716. Epub 2024 Oct 16. No abstract available.

Reference Type: DERIVED

PMID: 39413203 (View on PubMed)

Provided Documents

Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

ARGX-113-2104

Identifier Type: -

Identifier Source: org_study_id