Clinical Study in Thyroid Eye Disease (TED)

Phase 3 Study to Evaluate the Safety and Efficacy of Self-administered Efgartigimod SC injection for Adults with Thyroid Eye Disease (TED)1

About The Study

To evaluate efgartigimod PH20 SC given by prefilled syringe in adults with active, moderate-to-severe TED, compared with placebo PH20 SC.

Learn More

Eligibility

Understand the inclusion/exclusion criteria of the study to see if one of your patients may be eligible to participate.

Learn More

Participation

After the screening period, participants will be randomized to 1 of 2 parallel arms to receive either efgartigimod or placebo (2:1 randomization).

Learn More

EUclinicaltrials.eu ID 2023-509197-35-00 | 2023-509198-22-00

About The Study

Study goal: To evaluate the efficacy and safety of efgartigimod PH20 SC given by prefilled syringe in adults with active, moderate-to-severe TED, compared with placebo PH20 SC.

Two phase 3, randomized, double-masked, placebo-controlled, multicentre studies of efgartigimod for subcutaneously injected efgartigimod are each enrolling approximately 108 adult participants with moderate-to-severe thyroid eye disease.

About Efgartigimod

Efgartigimod is being clinically developed to treat autoimmune diseases mediated by pathogenic IgG autoantibodies and is currently approved for the treatment of myasthenia gravis and CIDP. It has not been approved for TED and the purpose of this study is to establish its efficacy and safety in this disease.

Efgartigimod prevents the binding of endogenous IgG to FcRN, leading to a reduction in circulating disease-causing autoantibodies.2 Because efgartigimod reduces IgG levels, it could reduce the pathogenic TSHR autoantibodies that are linked to TED clinical manifestations, activity and severity.3

Study Eligibility

Key Participant Inclusion Criteria

Must meet all of the following criteria:

  1. Age 18 years or older

  2. Capable of providing signed informed consent

  3. Agrees to use contraceptive measures consistent with local regulations

  4. The participant has a physician's diagnosis of active, moderate-to-severe thyroid eye disease (TED) associated with autoimmune thyroid conditions (Graves' disease or Hashimoto's thyroiditis)

  • The participant has onset of active TED symptoms within 12 months before screening

  • The participant must have normal thyroid function with the baseline disease under control or have mild hypo or hyperthyroidism at screening

Key Participant Exclusion Criteria

Patients may not be eligible to participate if the following applies:

  1. Optic neuropathy, defined as new visual field defect (blind spot), relative afferent pupillary defect (pupils respond differently to light), or colour defect secondary to optic nerve involvement within the 6 months before screening

  2. Corneal decompensation unresponsive to medical management

  3. Previous orbital irradiation or surgery for TED, requires immediate eye surgery, or corrective surgery/irradiation therapy is planned during the study

  4. Use of some medications before screening

  5. Known autoimmune disease or any medical condition that would interfere with an accurate assessment of clinical symptoms of TED or puts the participant at undue risk

  6. History of malignancy, cancer, unless considered cured by adequate treatment with no evidence of recurrence for ≥3 years

  7. Clinically significant active infection that is not sufficiently resolved in the investigator's opinion or positive serum test at screening for active infection with any of the following: Hepatitis B virus (HBV), Hepatitis C virus (HCV), HIV

Further information can be found in the study listings at euclinicaltrials.eu UplighTED 2301 and euclinicaltrials.eu UplighTED 2309

Study Participation

Study Design


Participants will be trained in self-injection by the study team, and will administer first injections under their supervision. After adequate training, participants can self-inject, or have a caregiver inject at home, without having to travel to the study site.

Study Centre Locations

Hospital La Arruzafa, Cordoba, Spain

Universidad de Sevilla - Hospital Universitario Virgen Macarena, Sevilla, Spain

Hospital Puerta de Hierro, Majadahonda, Spain

Hospital Universitario Ramon y Cajal, Madrid, Spain

Hospital Clinico Universitario De Santiago De Compostela, Santiago De Compostela, Spain

Institut Catala de la Retina - Sarria, Barcelona, Spain

Medical Center Hera EOOD, Sofia, Bulgaria

Medical Center Vereya EOOD, Stara Zagora, Bulgaria

Multi-Profile Hospital for Active Treatment (MHAT) Hadji Dimitar, Sliven, Bulgaria

Eye Clinic Sveta Petka, Varna, Bulgaria

Diagnostic-Consultative Center Aleksandrovska EOOD, Sofia, Bulgaria

AIPSMAED Sveti Luka EOOD, Plovdiv, Bulgaria

Interbalkan Medical Center, Thessaloniki, Greece

University Hospital of Patras, Rio, Patras, Greece

Gennimatas General Hospital, Athens, Greece

Office of Dr. Liina Viitas MD, Parnu, Estonia

Tartu University Hospital, Tartu, Estonia

CHU Brugmann – HUDERF, Brussels, Belgium

Budapest Retina Associates, Budapest, Hungary

University of Pécs Medical School, Pécs, Hungary

Ganglion Orvosi Kozpont, Pecs, Hungary

AOU Federico II, Naples, Italy

AOU Careggi, Firenze, Italy

Clinica Oculistica Universitaria di Genova, Genova, Italy

AST Santi Paolo e Carlo, Milan, Italy

(IRCCS) - Ospedale San Raffaele, Milan, Italy

Ospedale di Circolo ASST dei Sette Laghi, Varese, Italy

Ospedale Mauriziano Umberto I, Turin, Italy

Azienda Ospedaliero - Universitaria Sant’Andrea, Rome, Italy

Saint Spiridon County Hospital, Iași, Romania

Spitalul Dr. Carol Davila, Bucharest, Romania

Sana Monitoring, Bucharest, Romania

Szpital Sw. Rozy, Krakow, Poland

Royal Victoria Infirmary - The NUT Hospitals NHS Foundation Trust, Newcastle, UK

Frimley Park Hospital, Frimley, Camberley, UK

University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, UK

Western Eye Hospital - Imperial College Healthcare NHS Trust, London, UK

Charité Universitätsmedizin, Berlin, Germany

Oftex, s.r.o. Prague, Czech Republic

AXON Clinical, s.r.o. Prague, Czech Republic

OFTEX Ocni klinika, Pardubice, Czech Republic

Vienna Institute for Research in Ocular Surgery - Hanusch Hospital, Vienna, Austria

Landeskrankenhaus - Universitaetskliniken Innsbruck, Innsbruck, Austria

Pauls Stradiņš Clinical University Hospital, Riga, Latvia

Hospital Clinico Universitario De Valladolid, Valladolid, Spain

GAIAS Research, Valencia, Spain

OMIQ Research, Spain

Hospices Civils de Lyon (HCL) - Hopital Louis Pradel, Bron, France

Refer Your Patients with Moderate-To-Severe TED

CHU de Saint-Étienne, Saint Priest en Jarez, France

Hôpital Claude Huriez, Lille, France

Hôpital National de la vision des Quinze-Vingt, Paris, France

Hospital Universitari General de Catalunya, Sant Cugat del Valles, Spain

Contact us to refer a patient

Print an HCP Study Fact Sheet

References:

1. euclinicaltrials.eu ID 2023-509197-35-00 and 2023-509198-22-00.
2. Ulrichts et al. Neonatal Fc receptor antagonist efgartigimod safely and sustainably reduces IgGs in humans J Clin Invest. 2018;  128(10):4372-4386.
3. Sarić Matutinović et al. The phenotype of Graves' orbitopathy is associated with thyrotropin receptor antibody levels. J Endocrinol Invest. 2023 Nov;46(11):2309-2317.

UplighTED Study HCP Website_CMS_MED-EU-ESC-2400016

©2025 argenx. All rights reserved.