A Study of Inebilizumab Efficacy and Safety in IgG4- Related Disease

  • End date
    Jun 8, 2024
  • participants needed
  • sponsor
    Viela Bio (acquired by Horizon Therapeutics)
Updated on 8 April 2023


This study aims to evaluate the efficacy and safety of inebilizumab for the prevention of flare of IgG4-related disease (IgG4-RD).


After a screening period of up to 28 days, subjects with IgG4-RD at high risk of flare due to multi-organ disease and recent active disease will be randomized in a 1:1 ratio to receive intravenous (IV) inebilizumab or placebo after premedication during the 52-week randomized control period (RCP). All subjects will receive an initial tapering dose of glucocorticoids (GCs) to complete treatment of their active disease. Flares occurring during study will be treated. The primary endpoint is time to a first adjudication committee-determined, investigator-treated disease flare during the RCP. The primary analysis will be conducted when the last subject completes the RCP visit or discontinues the RCP. This study includes an optional 3-year open-label treatment period. The study also includes a Safety Follow-up Period (SFUP) after IP discontinuation of up to 730 days. The expected duration of each subject's participation in this study is up to 400 days (screening and RCP), plus up to 1095 days for eligible subjects who enroll in the optional open label period (OLP), and up to 730 days for the SFUP after IP discontinuation, for a total maximum duration of up to 2273 days (screening, RCP, interval between RCP and OLP, OLP, and FSUP).

Condition IgG4 Related Disease
Treatment Placebo, Inebilizumab
Clinical Study IdentifierNCT04540497
SponsorViela Bio (acquired by Horizon Therapeutics)
Last Modified on8 April 2023


Yes No Not Sure

Inclusion Criteria

Male or female adults, ≥ 18 years of age at time of informed consent
Clinical diagnosis of IgG4-RD
Fulfillment of the 2019 ACR/EULAR classification criteria
Experiencing (or recently experienced) an IgG4-RD flare that requires initiation or continuation of glucocorticoid (GC) treatment at the time of informed consent
IgG4-RD affecting at least 2 organs/sites at any time in the course of IgG4-RD
Non-sterilized male subjects who are sexually active with a female partner of childbearing potential must use a condom with spermicide from Day 1 through to the end of the study and must agree to continue using such precautions for at least 6 months after the final dose of IP. Females of childbearing potential who are sexually active with a non-sterilized male partner must use a highly effective method of contraception

Exclusion Criteria

History of solid organ or cell-based transplantation or known immunodeficiency disorder
Active malignancy or history of malignancy that was active within the last 10 years (some specific situations for cervical, skin or prostate cancer are acceptable)
Receipt of any biologic B cell-depleting therapy or non-depleting B-cell-directed therapy in prior 6 months
Receipt of non-biologic DMARD or immunosuppressive agent other than GCs within prior 4 weeks
Active tuberculosis or high risk for tuberculosis; hepatitis C infection in absence of curative treatment; evidence of hepatitis B infection
Receipt of live vaccine or live therapeutic infectious agent within 2 weeks prior to screening
Estimated glomerular filtration rate < 30 mL/min/1.73 m^2
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