A Phase 2 interventional study of Inebilizumab in Immunoglobulin G4-related Disease, sponsored by Amgen. Recruiting at 19 sites in 8 countries. Open to participants aged 2 Years to 18 Years. Per ClinicalTrials.gov, last updated 2026-11-13.
Sponsored by Amgen · Phase 2, Interventional, and Treatment
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Among 14 studies in Immunoglobulin G4-Related Disease with a site in United States — 4 open to participants now, 7 under way, 3 of them phase 3. Immunoglobulin G4-Related Disease · United States.
Among the 14 studies in Immunoglobulin G4-Related Disease with a site in United States, this one is the 7th largest by planned enrollment of the 12 interventional ones that give a count, is one of 2 that started in 2026, is one of 7 in phase 2, and was the 14th registered.
72 studies on the registry are indexed under Immunoglobulin G4-Related Disease; 40 are open to participants now.
Browse Immunoglobulin G4-Related Disease studies →4 of the 14 studies in Immunoglobulin G4-Related Disease with a site in United States are open now. Recruiting first, the newest first:
Acepodia Biotech, Inc. · Sites in United States, China, Japan
Ages 18+
Sanofi · Sites in United States, Argentina, Belgium and 16 more countries
Ages 18+
Emory University · Sites in United States
Ages 18+ · Healthy volunteers
A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →
Of the 28 Immunoglobulin G4-Related Disease studies recruiting now, 12 (43%) set no upper age limit and 13 (46%) stop at 75 or younger; 3 take children under 18; 3 take healthy volunteers.
This study: 2 Years to 18 Years · all sexes · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
14 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 2 · Phase 2 8 · Phase 3 3
First in 2012; this study’s year is marked. 2 started in 2026.
By drug class, each counting the studies that test any of its medicines:
This study's planned enrollment of 15 is below the median of 48 across 52 interventional studies indexed under Immunoglobulin G4-Related Disease.
Median enrollment 18 across the 12 interventional studies, 1,506 across the 2 observational. Of the 7 that completed or were terminated, 4 (57%) have results posted.
This tab as a report to print or save as PDF → With an account.
7 of 14 have an industry lead sponsor. The 10 most frequent:
Amgen is the lead sponsor of 1,047 studies on the registry; 51 are open to participants now.
Of its 246 completed or terminated interventional studies of FDA-regulated products, 166 (67%) have results posted.
Amgen has 2 studies filed under Immunoglobulin G4-Related Disease — fewer than ten, so there is no comparison to draw.
None of the studies under way reaches primary completion within a year.
Among the 14 studies in Immunoglobulin G4-Related Disease with a site in United States, from their registry updates:
This tab as a report to print or save as PDF → With an account.
The primary objectives of this study are to characterize the pharmacokinetics (PK) and pharmacodynamics (PD), as well as to assess the safety and tolerability, of inebilizumab in pediatric participants with IgG4-RD.
Key Inclusion Criteria:
Key Exclusion Criteria:
Participants with any of the following abnormal liver function tests in the presence of hepatobiliary IgG4-RD activity:
Evidence of significant hepatic, renal, or metabolic dysfunction or significant hematological abnormality, including any of the following at screening (one repeat test may be conducted to confirm results within the same screening period):
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.
It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.
The number of CD4 cells, a type of white blood cell, in a given amount of blood. It is used to follow how well the immune system is doing in HIV.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Absolute neutrophil count (ANC)
The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.
It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CD4 count
The number of CD4 cells, a type of white blood cell, in a given amount of blood. It is used to follow how well the immune system is doing in HIV.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive Inebilizumab via intravenous (IV) infusion.
Drug: Inebilizumab
Inebilizumab will be administered via IV infusion.
Maximum Plasma Concentration (Cmax) of Inebilizumab
Time frame: Up to Day 561
Area Under the Plasma Concentration-time Curve (AUC) of Inebilizumab
Time frame: Up to Day 561
Clearance (CL) of Inebilizumab
Time frame: Up to Day 561
Terminal Half-life (t½) of Inebilizumab
Time frame: Up to Day 561
Volume of Distribution at Steady-state (Vss) of Inebilizumab
Time frame: Up to Day 561
Change from Baseline in CD20+ B-cell Counts
Time frame: Baseline and Day 561
Number of Participants Experiencing Adverse Events (AEs)
Time frame: Up to Day 561
Number of Participants Experiencing Serious Adverse Events (SAEs)
Time frame: Baseline up to Day 561
Number of Participants Experiencing Events of Interest (EOIs)
Time frame: Baseline up to Day 561
Number of Participants Experiencing Clinically Significant Changes from Baseline in Laboratory Parameters
Time frame: Baseline up to Day 561
Number of Participants Experiencing Clinically Significant Changes from Baseline in Vital Signs
Time frame: Baseline up to Day 561
Time-to-first Treated Flare Across 52 Weeks
Time frame: Up to Week 52
Percentage of Flare-free Participants Across 52 Weeks
Time frame: Up to Week 52
Annualized Flare Rate Across 52 Weeks
Time frame: Up to Week 52
Presence of Antidrug Antibodies (ADA) Before and After Initiation of Treatment
Time frame: Day 1 to Day 561
Percent Reduction from Baseline in Daily Glucocorticoid Dose at Week 52
Time frame: Baseline and Week 52
Plan to share: Yes — De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.
Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report
Time frame: Data sharing requests relating to this study will be considered beginning 18 months after the study has ended and either 1) the product and indication (or other new use) have been granted marketing authorization in both the US and Europe, or 2) clinical development for the product and/or indication discontinues and the data will not be submitted to regulatory authorities. There is no end date for eligibility to submit a data sharing request for this study.
Access criteria: Qualified researchers may submit a request containing the research objectives, the Amgen product(s) and Amgen study/studies in scope, endpoints/outcomes of interest, statistical analysis plan, data requirements, publication plan, and qualifications of the researcher(s). In general, Amgen does not grant external requests for individual patient data for the purpose of re-evaluating safety and efficacy issues already addressed in the product labelling. Requests are reviewed by a committee of internal advisors, and if not approved, may be further arbitrated by a Data Sharing Independent Review Panel. Upon approval, information necessary to address the research question will be provided under the terms of a data sharing agreement. This may include anonymized individual patient data and/or available supporting documents, containing fragments of analysis code where provided in analysis specifications. Further details are available at the URL below.
Data sharing details ↗ · www.amgen.com
Started Oct 2026 (actual). Primary completion is estimated for Jun 2031, 55 months after the start.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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Studies of the drug tested here: Inebilizumab
Immunoglobulin G4-Related Disease →