Bullous Pemphigoid (Argenx Study)

Study Description

Brief Summary

ARGX-113-2009 is an operationally seamless 2-part, phase 2/3, prospective, global, multicenter, randomized, double-blinded, placebo-controlled study to investigate the efficacy, safety, tolerability, immunogenicity, participant-reported outcome measures (including those assessing participant QoL), PK, and PD of efgartigimod PH20 SC administered via subcutaneous (SC) injection in adult participants with moderate to severe BP. This study intends to demonstrate that efgartigimod is an effective and safe treatment for BP, providing participants with control of disease activity (CDA) and eventually remission while reducing their cumulative exposure to OCS.

The study will consist of 2 parts:

  • Part A of the study is a phase 2 evaluation that intends to provide proof of concept for the therapeutic activity of efgartigimod PH20 SC in participants with BP.
  • Part B of the study is a phase 3 evaluation that intends to confirm the results obtained from part A in a separate, larger group of participants with BP.

An interim analysis will be performed during part A (on data obtained through week 26 for all Part A participants) to assess the primary endpoint and several secondary endpoints, confirm the appropriate sample size for part B of the study, and determine whether the efficacy results observed through week 26 of part A warrant continued study of efgartigimod PH20 SC for the treatment of participants with BP (futility analysis).

Other than differences in main goals, endpoints, and statistical analyses, parts A and B are identical in schedule, structure, assessments, and conduct.

Condition or Disease

Bullous Pemphigoid

Study Design

Study Type: Interventional  (Clinical Trial)
Estimated Enrollment: 160 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Phase 2/3, Randomized, Double-Blinded, Placebo-Controlled, Parallel-Group Study to Investigate the Efficacy and Safety of Efgartigimod PH20 SC in Adult Participants With Bullous Pemphigoid
Actual Study Start Date: June 9, 2022
Estimated Primary Completion Date: March 2024
Estimated Study Completion Date: April 2024

Eligibility Criteria

Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
Sexes Eligible for Study: All
Accepts Healthy Volunteers: No

Inclusion Criteria:

  • The participant is willing and able to do the following:
    • understand the requirements of the study
    • provide written informed consent
    • comply with the study protocol procedures.
  • The participant is male or female and has reached the age of consent at the time of signing the informed consent form (ICF).
  • Participants have clinical signs of BP.
  • Contraceptive use by men and women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies and:
    • Male participants:

      * Must agree to use an acceptable method of contraception from the time that the ICF is signed until the date of their last dose of IMP.

    • Female participants:
      • Women of childbearing potential (WOCBP) must have a negative serum pregnancy test at screening and a negative urine pregnancy test at baseline before study intervention can be administered.
      • WOCBP must agree to use at least one of the contraception methods identified in the protocol from the time that the ICF is signed until the date of their last dose of IMP.

The full list of inclusion criteria can be found in the protocol.

Exclusion Criteria:

  • Other forms of pemphigoid or other autoimmune bullous diseases (AIBDs).
  • Received unstable dose of treatments known to cause or exacerbate BP for at least 4 weeks prior to the baseline visit
  • Use of BP treatments other than oral corticosteroids (OCS), topical corticosteroids (TCS), conventional immunosuppressants or dapsone.
  • Known contraindication to OCS therapy
  • Active or chronic infection at screening
  • Positive COVID-19 test result at screening (testing performed if required per local regulations).
  • History of malignancy unless deemed cured by adequate treatment with no evidence of recurrence for ‚Č•3 years before the first administration of the IMP. Participants with the following cancers can be included at any time, provided they are adequately treated prior to their participation in the study:
    • Basal cell or squamous cell skin cancer
    • Carcinoma in situ of the cervix
    • Carcinoma in situ of the breast
    • Incidental histological finding of prostate cancer
  • Clinical evidence of other significant serious diseases, have had a recent surgery, or who have any other condition that, in the opinion of the investigator, could confound the results of the study or put the patient at undue risk
  • Use of an investigational product within 3 months before the first dose of IMP
  • Previously participated in a clinical study with efgartigimod
  • Known hypersensitivity to any of the components of the administered treatments
  • Positive serum test at screening for an active infection:
    • HBV
    • HCV
    • HIV
  • Current or history (ie, within 12 months of screening) of alcohol, drug, or medication abuse
  • Pregnant or lactating females and those who intend to become pregnant during the study

The full list of exclusion criteria can be found in the protocol.