Immunoglobulin G4 Related DiseasePhase 3RILIEFNCT07190196
A 52-week Study of Rilzabrutinib Efficacy and Safety Compared to Placebo in Adults Diagnosed With IgG4-related Disease
A Phase 3 study testing Rilzabrutinib and Glucocorticoid in people with Immunoglobulin G4 Related Disease, run by Sanofi at 95 sites in 19 countries.
Trial summary
This is a Phase 3, parallel group, 2-arm, randomized, double blind, placebo-controlled, 52-week treatment study to assess the efficacy and safety of rilzabrutinib as a treatment for adult patients with active IgG4-RD. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Immunoglobulin G4 Related Disease
- What is being tested?
- Rilzabrutinib and Glucocorticoid
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 124 participants
- Where
- 95 sitesin 19 countries
- Study dates
- 26 Sep 2025to 25 Dec 2030
- Phase
- Phase 3
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Participants must have a clinical diagnosis of IgG4-RD confirmed by the Adjudication Committee.
- Participants meeting Step 1 Entry criteria of 2019 ACR/EULAR classification criteria for IgG4-RD and Total inclusion points are ≥20
- Participants with active disease in at least 1 organ system, excluding lymph nodes, with active disease defined by an IgG4-RD Responder Index organ/site activity score ≥2 based on the manifestations of disease activity in the last 28 days.
- Participants with history or current involvement of at least 1 organ/site (excluding lymph nodes) affected with IgG4-RD.
- Participants with active IgG4-RD controlled for at least 2 weeks while on a stable dose of GC.
- Participants willing to taper off GC after starting IMP.
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- Participants willing and able to participate in repeated study protocol mandated or clinically indicated imaging procedures to assess IgG4-RD such as computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), or ultrasound.
- Participants who have an up-to-date vaccination status as per local guidelines. The last dose of live vaccines should be received at least 30 days before Day 1.
- Contraceptive use by men and women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
Who cannot join
- Meet any Step 2 Exclusion criteria from the 2019 ACR/EULAR classification criteria for IgG4-RD.
- History of retroperitoneal fibrosis, sclerosing mesenteritis, fibrosing mediastinitis, or other overwhelmingly fibrotic expression of IgG4-RD that is the sole disease manifestation.
- Active malignancy or history of malignancy within 5 years before Day 1, except completely treated in situ carcinoma of the cervix, completely treated, and resolved nonmetastatic squamous or basal cell carcinoma of the skin.
- Known or suspected immunodeficiency, including history of invasive opportunistic infections (eg, histoplasmosis, listeriosis, coccidioidomycosis, pneumocystosis, and aspergillosis) despite infection resolution, or otherwise recurrent infections of abnormal frequency or prolonged duration suggesting an immune compromised status, as judged by the Investigator.
- History of serious infections with the potential for recurrence (as judged by the Investigator), with less than 4 weeks interval between resolution of serious infection and first dose of study drug, or currently active moderate to severe infection at Screening (Grade 2 or higher).
- Current or chronic history of liver disease unrelated to IgG4-RD.
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- Refractory nausea and vomiting, malabsorption, external biliary shunt, bariatric surgery, or significant bowel resection that would preclude adequate rilzabrutinib/placebo absorption.
- History of solid organ transplant.
- Planned major surgical procedure during the participation in this study.
- History of drug abuse within the previous 12 months.
- Alcoholism or excessive alcohol use, defined as regular consumption of more than approximately 3 standard drinks per day.
- Prior participation in any rilzabrutinib studies or other BTK inhibitor studies.
- History of treatment with an investigational drug within 6 months or 5 half-lives of the investigational drug, whichever is longer.
- Laboratory abnormalities at the screening visit identified by the central laboratory The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.
Trial locations and contacts
95 sites in 19 countries. Contact the study team or a site near you to ask about taking part.
Trial Transparency email recommended (Toll free for US & Canada) contact
95 sites in 19 countries
United States21 sites, 21 recruiting
- Recruiting
Emory University School of Medicine - Atlanta- Site Number : 8400013
Atlanta, Georgia, 30322
- Recruiting
Massachusetts General Hospital- Site Number : 8400008
Boston, Massachusetts, 02114
- Recruiting
Arthritis and Osteoporosis Consultants of the Carolinas- Site Number : 8400035
Charlotte, North Carolina, 28207
- Recruiting
Cleveland Clinic - Cleveland- Site Number : 8400001
Cleveland, Ohio, 44195
Danielle Haas, 216-385-2438, haasd2@ccf.org
James Fernandez
- Recruiting
Ohio State University Wexner Medical Center- Site Number : 8400024
Columbus, Ohio, 43215
- Recruiting
Henry Ford Hospital- Site Number : 8400009
Detroit, Michigan, 48202
- Recruiting
Primeway Clinical Research- Site Number : 8400019
Fayetteville, Georgia, 30214
Celine Lalu, 678-368-7197, celinek@primewayclinicalresearch.com
Charlita Worthy
- Recruiting
Kaiser Permanente - Fontana Medical Center- Site Number : 8400015
Fontana, California, 92335
- Recruiting
Life Clinical Trials - Margate - Colonial Drive- Site Number : 8400002
Margate, Florida, 33063
Ana Auza, 954-669-1052, auza@ictresearch.com
Jigar Shah
- Recruiting
Paramount Medical Research and Consulting LLC- Site Number : 8400018
Middleburg Heights, Ohio, 44140
Jackie Wittenmyer, 440-826-0742, jwittenmyer5@yahoo.com
Isam Diab
- Recruiting
Icahn School of Medicine at Mount Sinai- Site Number : 8400014
New York, New York, 10029
- Recruiting
Vitalia Medical Research - Margate- Site Number : 8400025
Palm Beach Gardens, Florida, 33410
Delano Brooks, 561-975-3684, dbrooks@vitaliaresearch.com
Clifford Stermer
- Recruiting
Stryde Research- Site Number : 8400011
Plano, Texas, 75093
Jayshree Chouhan, 214-407-8640, jchouhan@stryderesearch.com
Rahul Patel
- Recruiting
Epic Medical Research - Red Oak- Site Number : 8400003
Red Oak, Texas, 75154
Siby Spurgeon, 972-777-6956, sspurgeon@epicmedresearch.com
Sunny Patel
- Recruiting
Mayo Clinic in Rochester - Minnesota- Site Number : 8400017
Rochester, Minnesota, 55905
Christian Coy, 507-284-2175, coy.christian@mayo.edu
Motaz Ashkar
- Recruiting
University of California Davis Health- Site Number : 8400012
Sacramento, California, 95817
- Recruiting
San Jose Clinical Trials- Site Number : 8400016
San Jose, California, 95128
Sara Viznyuk, 408-443-3542, sviznyuk@sanjosetrials.com
Slawomir Wojtowicz-Praga
- Recruiting
Velocity Clinical Research - Seattle- Site Number : 8400005
Seattle, Washington, 98105
Christeen DeNeui, 206-536-3030, cdeneui@velocityclinical.com
Kris Kowdley
- Recruiting
Tampa General Hospital - Tampa - General Circle- Site Number : 8400027
Tampa, Florida, 33606
- Recruiting
Solace Clinical Research - Tustin- Site Number : 8400020
Tustin, California, 92780
Hikyhe Ogannesian, 562-652-0005, hikyhe@salacecr.com
Roger Kornu
- Recruiting
Digestive Health Research of North Texas- Site Number : 8400021
Wichita Falls, Texas, 76301
Sarah Sparkman, 940-222-6675, Sarah.sparkman@objective.health
Vanya Wagler
Japan11 sites, 11 recruiting
- Recruiting
Investigational Site Number : 3920008
Bunkyo, Tokyo, 113-8677
- Recruiting
Investigational Site Number : 3920003
Hirakata, Osaka, 573-1191
- Recruiting
Hiroshima University Hospital-Site Number : 3920007
Hiroshima, Hiroshima, 734-8551
Shintaro Hirata, +81-82-257-5555, shirata@hiroshima-u.ac.jp
Shintaro Hirata
- Recruiting
Kanazawa Medical University Hospital-Site Number : 3920002
Kahoku, Uchinada, Ishikawa-ken, 920-0293
Yasufumi Masaki, +81-76-286-3511, yasum1macky1@gmail.com
Yasufumi Masaki
- Recruiting
Investigational Site Number : 3920001
Kanazawa, Ishikawa-ken, 920-8641
- Recruiting
Investigational Site Number : 3920004
Kitakyushu, Fukuoka, 807-8556
- Recruiting
Kobe University Hospital-Site Number : 3920010
Kobe, Hyōgo, 650-0017
Yuzo Kodama, +81-78-382-5111, kodama@med.kobe-u.ac.jp
Yuzo Kodama
- Recruiting
The Institute of Medical Science, The University of Tokyo-Site Number : 3920006
Minato-ku, Tokyo, 108-8639
Motohisa Yamamoto, +81-3-3443-8111, mocha0422jp@yahoo.co.jp
Motohisa Yamamoto
- Recruiting
Investigational Site Number : 3920005
Nagaoka, Niigata, 940-2108
- Recruiting
Investigational Site Number : 3920011
Sapporo, Hokkaido, 060-8543
- Recruiting
Investigational Site Number : 3920009
Tokyo, 160-8582
China10 sites, 10 recruiting
- Recruiting
Investigational Site Number : 1560008
Beijing, 100034
- Recruiting
Investigational Site Number : 1560004
Beijing, 100050
- Recruiting
Investigational Site Number : 1560001
Beijing, 100730
- Recruiting
Investigational Site Number : 1560012
Chengdu, 610041
- Recruiting
Investigational Site Number : 1560010
Hangzhou, 310009
- Recruiting
Investigational Site Number : 1560003
Jiazhuang, 050000
- Recruiting
Investigational Site Number : 1560013
Taiyuan, 030001
- Recruiting
Investigational Site Number : 1560005
Taiyuan, 030032
- Recruiting
Investigational Site Number : 1560011
Wuhan, 430030
- Recruiting
Investigational Site Number : 1560009
Yantai, 264001
France7 sites, 5 recruiting
- Active, not recruiting
AP-HP - Hôpital Beaujon-Site Number : 2500002
Clichy, 92110
- Recruiting
Investigational Site Number : 2500004
Dijon, 21000
- Recruiting
Investigational Site Number : 2500005
Lille, 59037
- Recruiting
Investigational Site Number : 2500006
Lyon, 69004
- Recruiting
Investigational Site Number : 2500001
Marseille, 13885
- Active, not recruiting
CHU Bordeaux - Hôpital Haut Leveque-Site Number : 2500003
Pessac, 33600
- Recruiting
Investigational Site Number : 2500007
Suresnes, 92151
Argentina5 sites, 5 recruiting
- Recruiting
Investigational Site Number : 0320005
Berazategui, Buenos Aires, 1886
- Recruiting
Investigational Site Number : 0320004
Buenos Aires, 1015
- Recruiting
Investigational Site Number : 0320002
Buenos Aires, 1180
- Recruiting
Investigational Site Number : 0320006
Buenos Aires, 1181
- Recruiting
Investigational Site Number : 0320003
San Isidro, Buenos Aires, B1643CRO
Chile5 sites, 5 recruiting
- Recruiting
Investigational Site Number : 1520005
Concepción, Biobio, 4070038
- Recruiting
Investigational Site Number : 1520006
Puente Alto, Reg Metropolitana de Santiago, 8207257
- Recruiting
Centro de estudios G y C-Site Number : 1520003
Santiago, Reg Metropolitana de Santiago, 7500504
Iván Gónzalez, +56 9 93459808, ivangonzalez44@yahoo.com
Iván Gónzalez
- Recruiting
Investigational Site Number : 1520001
Santiago, Reg Metropolitana de Santiago, 8320325
- Recruiting
Investigational Site Number : 1520002
Santiago, Reg Metropolitana de Santiago, 8330032
Germany5 sites, 5 recruiting
- Recruiting
Investigational Site Number : 2760001
Berlin, 13353
- Recruiting
Investigational Site Number : 2760003
Erlangen, 91054
- Recruiting
Investigational Site Number : 2760007
Hanover, 30625
- Recruiting
Investigational Site Number : 2760004
Minden, 32429
- Recruiting
Investigational Site Number : 2760006
Ulm, 89081
Israel4 sites, 4 recruiting
- Recruiting
Investigational Site Number : 3760006
Kefar Sava, 4428164
- Recruiting
Investigational Site Number : 3760003
Nahariya, 2210001
- Recruiting
Rabin MC, Outpatient Clinics Building-Site Number : 3760001
Petah Tikva, Central District, 4941492
Elisheva Pokroy Shapira, elisheva@clalit.org.il
Elisheva Pokroy Shapira
- Recruiting
Sourasky Rheumatology Dept, Rishonim Building-Site Number : 3760005
Tel Aviv, Central District, 6423906
Yael Lahat Goldstein, yaellah@tlvmc.gov.il
Yael Lahat Goldstein
Spain4 sites, 4 recruiting
- Recruiting
Investigational Site Number : 7240001
Barcelona, Catalunya [Cataluña], 08035
- Recruiting
Investigational Site Number : 7240002
Barcelona, Catalunya [Cataluña], 08041
- Recruiting
Investigational Site Number : 7240004
Madrid, Madrid, Comunidad de, 28034
- Recruiting
Investigational Site Number : 7240007
Seville, Andalusia, 41013
Italy3 sites, 3 recruiting
- Recruiting
AOU Meyer IRCCS-Site Number : 3800003
Florence, Firenze, 50139
Ilaria Fibbi, +39 055 5662 905, ilaria.fibbi@meyer.it
Prof. Augusto Vaglio, augusto.vaglio@meyer.it
- Recruiting
IRCCS Ospedale San Raffaele-Site Number : 3800001
Milan, Lombardy, 20132
Prof. Lorenzo Dagna, +39 02 2643 3828, dagna.trials@hsr.it
Prof. Lorenzo Dagna
- Recruiting
Centro Ricerche Cliniche di Verona s.r.l. c/o Policlinico G.B.Rossi-Site Number : 3800002
Verona, Veneto, 37134
Dr. Luigi Ziviani, '+39 0458126616, luigi.ziviani@crc.vr.it
Prof. Luca Frulloni, luca.frulloni@univr.it
Poland3 sites, 3 recruiting
- Recruiting
Uniwersyteckie Centrum Kliniczne, Centrum Wsparcia Badan Klinicznych UCK Osrodek Badan Wczesnych Faz-Site Number : 6160003
Gdansk, Pomeranian Voivodeship, 80-214
Anna Masiak, 48585844466, obkwf@uck.gda.pl
Anna Masiak
- Recruiting
Malopolskie Badania Kliniczne sp. z. o.o.-Site Number : 6160001
Krakow, Lesser Poland Voivodeship, 30-002
Piotr Krawiec, +48 575 105 288, biuro@MBK.CLINIC
Bogdan Batko
- Recruiting
Investigational Site Number : 6160002
Wroclaw, Lower Silesian Voivodeship, 50-556
Taiwan3 sites, 3 recruiting
- Recruiting
Investigational Site Number : 1580004
Kaohsiung City, 833
- Recruiting
Investigational Site Number : 1580001
Taipei, 100
- Recruiting
Investigational Site Number : 1580002
Taoyuan City, 333
United Kingdom3 sites, 3 recruiting
- Recruiting
Investigational Site Number : 8260002
London, London, City of, W2 1NY
- Recruiting
Investigational Site Number : 8260004
Norwich, Norfolk, NR4 7UY
- Recruiting
Investigational Site Number : 8260001
Oxford, Oxfordshire, OX3 9DU
Canada2 sites, 2 recruiting
- Recruiting
Investigational Site Number : 1240004
Montreal, Quebec, H2L 4M1
- Recruiting
Investigational Site Number : 1240001
Sherbrooke, Quebec, J1G 2E8
Netherlands2 sites
- Active, not recruiting
UMCG-Site Number : 5280002
Groningen, 9713 GZ
- Active, not recruiting
Erasmus Medisch Centrum-Site Number : 5280001
Rotterdam, South Holland, 3015 GD
Saudi Arabia2 sites, 2 recruiting
- Recruiting
Investigational Site Number : 6820002
Riyadh, 12372
- Recruiting
Investigational Site Number : 6820001
Riyadh, 12713
South Korea2 sites, 2 recruiting
- Recruiting
Investigational Site Number : 4100001
Seoul, Seoul-teukbyeolsi, 03080
- Recruiting
Investigational Site Number : 4100002
Suwon, Gyeonggi-do, 16499
Sweden2 sites, 2 recruiting
- Recruiting
Investigational Site Number : 7520001
Huddinge, 141 57
- Recruiting
Investigational Site Number : 7520002
Uppsala, 751 85
Belgium1 site, 1 recruiting
- Recruiting
Investigational Site Number : 0560001
Leuven, 3000
About this study
Official title: A Randomized, Phase 3, Double-blind, 52-week Study to Evaluate the Efficacy and Safety of Rilzabrutinib (SAR444671) Compared to Placebo in Adult Participants With Active IgG4-related Disease
This is a Phase 3, parallel group, 2-arm, randomized, double blind, placebo-controlled, 52-week treatment study to assess the efficacy and safety of rilzabrutinib as a treatment for adult patients with active IgG4-RD.
The purpose of this study is to measure time to adjudicated IgG4-RD clinical disease flare, and other relevant efficacy endpoints including flare-free rate, control of IgG4-RD disease activity, use of GC rescue and safety parameters such as treatment-emergent adverse events, clinical laboratory values and electrocardiograms (ECG) in participants aged 18 years and above, diagnosed with IgG4-RD and treated with rilzabrutinib tablets over a 52-week placebo-controlled period.
Read more
Study details include:
The study duration will be up to 60 weeks, including a Screening period of 4 to 6 weeks, a 52-week double blind treatment period, and 2 weeks of follow up (plus an optional OLE of 108 weeks).
The number of visits will be 16 (plus an optional 9 visits during the OLE).
- Conditions
- Immunoglobulin G4 Related Disease
- Being tested
- Rilzabrutinib, Placebo, Glucocorticoid
- Medical subject headings
- Immunoglobulin G4-Related Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
RilzabrutinibDrug
Also called SAR444671
Pharmaceutical form:Tablet-Route of administration:Oral
PlaceboDrug
Pharmaceutical form:Tablet-Route of administration:Oral
GlucocorticoidDrug
Pharmaceutical form:Tablet, solution, suspension formulations according to local standard practices-Route of administration:Oral
| Study group | Role | What they receive |
|---|---|---|
| Rilzabrutinib | Experimental | Rilzabrutinib Receives: Drug: Rilzabrutinib; Drug: Glucocorticoid |
| Placebo | Placebo comparator | Placebo Receives: Drug: Placebo; Drug: Glucocorticoid |
What is being measured
The primary outcome is the main question the study is designed to answer.
Time to first adjudicated clinical disease flare treated by the investigator during the Blinded Treatment period
The Adjudication Committee will include internationally recognized independent experts in diagnosis and management of patients with IgG4-RD, blinded to participant, investigator, and site identifiers
Measured: Until Week 52
Secondary outcomes (12)
Proportion of participants without IgG4-RD adjudicated clinical disease flare and off glucocorticoids and immunomodulators
Measured: At Week 52
Proportion of participants without IgG4-RD adjudicated clinical disease flare and off glucocorticoids
Measured: At Week 52
Annualized rate of clinical disease flares
Measured: At Week 52
Change in IgG4-RD RI total activity scores from baseline to Week 52
Measured: From baseline to Week 52
Proportion of participants in complete remission at Week 52
Defined by an IgG4-RD RI total activity score = 0 or absence of evident disease activity assessed by the Investigator
Measured: At Week 52
Percent change in IgG4-RD RI total activity scores from baseline to Week 52
Measured: From baseline to Week 52
Change in IgG4-RD RI total activity scores from baseline to Week 12
Measured: From baseline to Week 12
Percent change in IgG4-RD RI total activity scores from baseline at Week 12
Measured: From baseline to Week 12
Proportion of participants with reduction of ≥2 points from the baseline IgG4-RD RI total activity score
Measured: At Week 12, Week 24, and Week 52
Cumulative glucocorticoid dose for treatment of IgG4-RD
Measured: At Week 52
Proportion of participants with potentially clinically significant abnormalities in laboratory tests, vital signs, and electrocardiograms in the Safety Population
Measured: Until Week 160
Proportion of participants with TEAEs, AESIs, SAEs in the Safety Population
Measured: Until Week 160
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Sep 2025
- Study start26 Sep 2025
- Primary completion28 Jun 2028 (estimated)
- Study completion25 Dec 2030 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Immunoglobulin G4 Related DiseaseStudies of the same condition, open and under way.
- More trials run by SanofiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 124 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Sanofi
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07190196
- Sponsor's protocol ID
- EFC17359
- Other IDs
- U1111-1316-0266, 2025-521398-15, 2025
- Acronym
- RILIEF
- Status last verified
- Oct 2026
- First submitted
- 17 Sep 2025
- Last updated
- 20 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org
Study at a glance
From the registry record, last updated by the sponsor on 20 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Randomized, Phase 3, Double-blind, 52-week Study to Evaluate the Efficacy and Safety of Rilzabrutinib (SAR444671) Compared to Placebo in Adult Participants With Active IgG4-related Disease
- ClinicalTrials.gov ID
- NCT07190196
- Acronym / sponsor ID
- RILIEF / EFC17359
- Conditions
- Immunoglobulin G4 Related Disease
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 124 participants (estimated)
- Lead sponsor
- SanofiIndustry (pharma, biotech, devices)
- Study start
- 26 Sep 2025 (actual)
- Primary completion
- 28 Jun 2028 (estimated)
- Study completion
- 25 Dec 2030 (estimated)
- First posted
- 24 Sep 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase 3, parallel group, 2-arm, randomized, double blind, placebo-controlled, 52-week treatment study to assess the efficacy and safety of rilzabrutinib as a treatment for adult patients with active IgG4-RD.
The purpose of this study is to measure time to adjudicated IgG4-RD clinical disease flare, and other relevant efficacy endpoints including flare-free rate, control of IgG4-RD disease activity, use of GC rescue and safety parameters such as treatment-emergent adverse events, clinical laboratory values and electrocardiograms (ECG) in participants aged 18 years and above, diagnosed with IgG4-RD and treated with rilzabrutinib tablets over a 52-week placebo-controlled period.
Study details include:
The study duration will be up to 60 weeks, including a Screening period of 4 to 6 weeks, a 52-week double blind treatment period, and 2 weeks of follow up (plus an optional OLE of 108 weeks).
The number of visits will be 16 (plus an optional 9 visits during the OLE).
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Rilzabrutinib | Experimental | Drug: Rilzabrutinib, Drug: GlucocorticoidRilzabrutinib |
| Placebo | Placebo comparator | Drug: Placebo, Drug: GlucocorticoidPlacebo |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (9 listed)
- Participants must have a clinical diagnosis of IgG4-RD confirmed by the Adjudication Committee.
- Participants meeting Step 1 Entry criteria of 2019 ACR/EULAR classification criteria for IgG4-RD and Total inclusion points are ≥20
- Participants with active disease in at least 1 organ system, excluding lymph nodes, with active disease defined by an IgG4-RD Responder Index organ/site activity score ≥2 based on the manifestations of disease activity in the last 28 days.
- Participants with history or current involvement of at least 1 organ/site (excluding lymph nodes) affected with IgG4-RD.
- Participants with active IgG4-RD controlled for at least 2 weeks while on a stable dose of GC.
Key exclusion criteria (14 listed)
- Meet any Step 2 Exclusion criteria from the 2019 ACR/EULAR classification criteria for IgG4-RD.
- History of retroperitoneal fibrosis, sclerosing mesenteritis, fibrosing mediastinitis, or other overwhelmingly fibrotic expression of IgG4-RD that is the sole disease manifestation.
- Active malignancy or history of malignancy within 5 years before Day 1, except completely treated in situ carcinoma of the cervix, completely treated, and resolved nonmetastatic squamous or basal cell carcinoma of the skin.
- Known or suspected immunodeficiency, including history of invasive opportunistic infections (eg, histoplasmosis, listeriosis, coccidioidomycosis, pneumocystosis, and aspergillosis) despite infection resolution, or otherwise recurrent infections of abnormal frequency or prolonged duration suggesting an immune compromised status, as judged by the Investigator.
- History of serious infections with the potential for recurrence (as judged by the Investigator), with less than 4 weeks interval between resolution of serious infection and first dose of study drug, or currently active moderate to severe infection at Screening (Grade 2 or higher).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| RilzabrutinibAlso: SAR444671Pharmaceutical form:Tablet-Route of administration:Oral | Drug | Rilzabrutinib |
| PlaceboPharmaceutical form:Tablet-Route of administration:Oral | Drug | Placebo |
| GlucocorticoidPharmaceutical form:Tablet, solution, suspension formulations according to local standard practices-Route of administration:Oral | Drug | Placebo, Rilzabrutinib |
Primary outcome
Time to first adjudicated clinical disease flare treated by the investigator during the Blinded Treatment period
Time frame: Until Week 52
The Adjudication Committee will include internationally recognized independent experts in diagnosis and management of patients with IgG4-RD, blinded to participant, investigator, and site identifiers
12 secondary outcomes
Proportion of participants without IgG4-RD adjudicated clinical disease flare and off glucocorticoids and immunomodulators
Time frame: At Week 52
Proportion of participants without IgG4-RD adjudicated clinical disease flare and off glucocorticoids
Time frame: At Week 52
Annualized rate of clinical disease flares
Time frame: At Week 52
Change in IgG4-RD RI total activity scores from baseline to Week 52
Time frame: From baseline to Week 52
Proportion of participants in complete remission at Week 52
Time frame: At Week 52
Percent change in IgG4-RD RI total activity scores from baseline to Week 52
Time frame: From baseline to Week 52
Change in IgG4-RD RI total activity scores from baseline to Week 12
Time frame: From baseline to Week 12
Percent change in IgG4-RD RI total activity scores from baseline at Week 12
Time frame: From baseline to Week 12
Proportion of participants with reduction of ≥2 points from the baseline IgG4-RD RI total activity score
Time frame: At Week 12, Week 24, and Week 52
Cumulative glucocorticoid dose for treatment of IgG4-RD
Time frame: At Week 52
Proportion of participants with potentially clinically significant abnormalities in laboratory tests, vital signs, and electrocardiograms in the Safety Population
Time frame: Until Week 160
Proportion of participants with TEAEs, AESIs, SAEs in the Safety Population
Time frame: Until Week 160
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Oct 2026.
- EFC17359 Plain Language Results SummaryLink provided by the sponsor.
- For EU sites click here and navigate to 'Locations and contact points'Link provided by the sponsor.
- Individual participant dataSharing planned: Yes. Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Trial Transparency email recommended (Toll free for US & Canada) contact
95 sites in 19 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Rilzabrutinib and Glucocorticoid in people with Immunoglobulin G4 Related Disease, run by Sanofi at 95 sites in 19 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 9 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 20 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 95 sites in United States, Japan, China, France, Argentina and 14 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Trial Transparency email recommended (Toll free for US & Canada) (800-633-1610 ext. option 6, contact-us@sanofi.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Time to first adjudicated clinical disease flare treated by the investigator during the Blinded Treatment period (time frame: Until Week 52). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Oct 2026.