Safety and Efficacy of Abatacept in IgG4-Related Disease

A Prospective, Open-label, Single Center Abatacept in IgG4-Related Disease 10-patient Proof-of-concept Study

This is a Phase 2, single center, proof of concept clinical trial in subjects with active IgG4-Related Disease (IgG4-RD). Approximately 10 subjects with active IgG4-RD will be enrolled into this study. Subjects will receive weekly subcutaneous doses of abatacept (125mg) for 24 doses (24 weeks).

Study Overview

• Status: Completed
• Conditions: IgG4-related Disease
• Intervention / Treatment: Drug: Abatacept

Detailed Description

After obtaining informed consent, all screening procedures and tests establishing eligibility will be performed on the initial screening visit. Subjects determined to be eligible at screening will receive an initial subcutaneous dose of abatacept (125mg), which will be continued weekly for a total of up to 24 doses (24 weeks). Steroid therapy must be tapered off and discontinued over a 4 week period (taper must be completed no later than week 4). Should patients be deemed to have worsening disease or failing therapy at 4 weeks then a trial of steroids can be considered.

Subjects will return on weeks 1, 2, 4, 8, 12, 16, 20, and 24 while on treatment for their injections, and for the scheduled safety and disease response assessments. Subjects will be allowed to self-administer their injections at home. The full treatment period is 24 doses given weekly for 24 weeks. Subjects who are not able to be tapered off corticosteroids or who require reinstitution of corticosteroid therapy at any time during the study will be counted as treatment failures, but may continue on study. Should the IgG4-RD responder index fail to improve by 8 weeks or should there be development of new organ failure at 4 weeks, patient's will be deemed treatment failure and can begin corticosteroid or alternative immunosuppressive therapy at the Investigator's discretion. Those who require rituximab or who require addition of other oral immunosuppressives will be counted as treatment failures and will terminate the study.

All subjects completing the treatment period will have follow up visits off protocolized treatment at 28 and 36 weeks. All adverse events (including serious adverse events (AEs) and deaths) and use of concomitant medication information will be collected throughout the study from screening through study termination. Subjects developing treatment-emergent adverse events or clinically significant safety lab abnormalities will be followed until resolution or until stabilization of the adverse events/abnormalities.

• Study Type: Interventional
• Enrollment (Actual): 10
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • Massachusetts
    • Boston, Massachusetts, United States, 02114
      • Massachusetts General Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Are male or female 18 years of age or older
2. Meet the American College of Rheumatology (ACR)/EULAR 2018 Classification Criteria for IgG4-RD
3. Have active disease based on an IgG4-RD Responder Index (RI) ≥2 at screening with disease manifestation in at least one organ system excluding lymph nodes at screening
4. May or may not have received prior IgG4-RD therapy
5. Must be willing to taper off any systemic corticosteroid therapy within 4 weeks of first dose of trial drug.
6. Must be able and willing to discontinue any immunosuppressive agent at screening (e.g. methotrexate, mycophenolate mofetil, 6-mercaptopurine, tacrolimus, cyclophosphamide or azathioprine).
7. No history of severe allergic reactions to monoclonal antibodies.
8. Are able and willing to complete the entire study according to the study schedule.
9. Are willing to forego other forms of experimental treatment during the study.
10. Are able to provide written informed consent.

Exclusion Criteria:

1. History or evidence of a clinically unstable/uncontrolled disorder, condition or disease (including but not limited to cardiopulmonary, oncologic, renal, hepatic, metabolic, hematologic or psychiatric) other than IgG4-RD that, in the opinion of the Investigator, would pose a risk to patient safety or interfere with the study evaluation, procedures or completion.
2. Malignancy within 5 years (except successfully treated in situ cervical cancer, resected squamous cell or basal cell carcinoma of the skin, or prostate cancer with no recurrence ≥3 years following prostatectomy).
3. Liver disease: Acute or chronic non-IgG4-related liver disease deemed sufficiently severe to impair their ability to participate in the trial.
4. Uncontrolled disease: evidence of another uncontrolled condition, including drug and alcohol abuse, which could interfere with participation in the trial according to the protocol.
5. Presence of recurrent or chronic infections, defined as ≥3 infections requiring antimicrobials over the past 6 months prior to screening.
6. Active infection requiring hospitalization or treatment with parenteral antimicrobials within the 30 days prior to randomization.
7. Prior use of rituximab (or other B cell depleting agents) within 6 months of enrollment unless B cells have been demonstrated to have repopulated.
8. Use of any investigational agent within 5 half-lives of the agent (or 6 months if the half-life is unknown) prior to enrollment.
9. White blood cell count < 2.5 x 103/µL.
10. Absolute neutrophil count (ANC) < 1.0 x 103/µL.
11. IgG4-related renal disease with serum creatinine >2.0 mg/dL.
12. Hemoglobin < 10 g/dL.
13. Platelet count < 75 x 109/L.
14. Known positive result for HIV I or II antibody, hepatitis B surface antigen, hepatitis B core antibody or hepatitis C antibody.
15. Has received live vaccines within 4 weeks of enrollment.
16. Inability to communicate reliably with the investigator.
17. Patient is pregnant or breast feeding, or planning to become pregnant while enrolled in the study, up to end of study (EOS) visit.
18. Positive pregnancy test at screening or during the study.
19. Subjects who do not agree to use medically acceptable methods of contraception.
20. Male patient with a pregnant partner who is not willing to use a condom during the treatment and up to end of study (EOS)visit.
21. Known or suspected sensitivity to mammalian cell-derived products or any components of the study drug.
22. History of alcohol and/or substance abuse within 12 months prior to screening.
23. Unable or unwilling to partake in follow-up assessments or required protocol procedures.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Abatacept; To assess the effect of weekly subcutaneous (SC) administration of abatacept on complete remission of IgG4-RD	Drug: Abatacept; Subjects will receive weekly subcutaneous doses of abatacept (125mg) for 24 doses (24 weeks); Other Names: Orencia

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Treatment Response	Effect of weekly subcutaneous (SC) administration of abatacept on complete remission	24 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Disease Response	Assess the effect of abatacept on disease response at week 12	12 weeks
Disease Response at Week 24	Percentage of patients achieving disease response at week 24	disease response at 24 weeks
Disease Remission: Flares Over Time Per Subject	number of disease flares per subject	24 weeks
Decline in Serum IgG4 Concentration of Responders	Serum IgG4 measured at baseline and week 24	24 Weeks
Decline in Serum IgE Concentration of Responders	Serum IgE concentration was measured at baseline and Week 24	24 weeks

Collaborators and Investigators

• Sponsor: Massachusetts General Hospital
• Collaborators: Bristol-Myers Squibb

Study record dates

Study Major Dates

• Study Start (Actual): November 13, 2018
• Primary Completion (Actual): April 10, 2020
• Study Completion (Actual): November 10, 2020

Study Registration Dates

• First Submitted: June 4, 2018
• First Submitted That Met QC Criteria: September 11, 2018
• First Posted (Actual): September 13, 2018

Study Record Updates

• Last Update Posted (Actual): August 24, 2021
• Last Update Submitted That Met QC Criteria: July 30, 2021
• Last Verified: July 1, 2021

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Immune System Diseases; Autoimmune Diseases; Immunoglobulin G4-Related Disease; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Antirheumatic Agents; Antineoplastic Agents; Immunosuppressive Agents; Immunologic Factors; Immune Checkpoint Inhibitors; Abatacept
• Other Study ID Numbers: IM101-744

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: Undecided
• IPD Plan Description: Individual participant data will be shared upon request - without personal health information - following completion of the analysis. Inquiries should be directed to the Principal Investigator.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No