New hope for FSGS? obinutuzumab trial targets tough cases
NCT ID NCT04983888
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 2 trial tested the drug obinutuzumab in 20 adults with a kidney disease called primary FSGS. The participants had not responded well to or could not take standard treatments like steroids. The goal was to see if obinutuzumab could reduce protein leakage in the urine, a sign of kidney damage. The drug was given as two IV infusions two weeks apart, with a repeat course at six months.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Obinutuzumab (a monoclonal antibody given by IV infusion)
- What this could lead to
- If it works, this could offer a new treatment option for people with FSGS who do not respond to or cannot take standard therapies, potentially reducing protein in the urine and protecting kidney function.
- What could go wrong
- This is a small, early-phase trial with only 20 participants, so results may not apply to everyone. Obinutuzumab can cause infusion reactions and increase infection risk, and it is not yet proven to be better than existing treatments.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
-
20 people
The number who actually took part.
- Started
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Nov 2021
- Finished
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Jun 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * ≥ 18 years of age. * Biopsy proven Focal Segmental Glomerulosclerosis (FSGS) lesion * Foot process effacement ≥ 80% on electron microscopy. * Presence of nephrotic syndrome (proteinuria \> 3.5g/24hrs and serum albumin \< 3.5 g/dl) prior to initiation of immunosuppressive therapy. * Resistant or dependent on therapy, including corticosteroids or calcineurin inhibitors or who have failed rituximab. Patient who have contraindication to or refuse to take high dose corticosteroids are allowed. Exclusion Criteria: * Genetic or secondary forms of FSGS. * Hepatitis B, C or HIV positive. * Pregnant or breast-feeding. * Active infection. * Kidney transplant. * Anemia with Hgb \< 8.0 g/dL. * Thrombocytopenia with platelet count \< 100'000. * Any other disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding giving reasonable suspicion of a disease or condition that contraindicates the use of an investigational drug or that may affect the interpretation of the results or render the patient at high risk from treatment complication. * Patients who have received cyclophosphamide in the last 6 months. * Patients who received rituximab previously with CD20 count of \< 5 cells/microliter at the time of enrollment. * For women who are not postmenopausal (≥ 12 months of non-therapy-induced amenorrhea) or surgically sterile (absence of ovaries and/or uterus): agreement to remain abstinent or use two adequate methods of contraception, including at least one method with a failure rate of less than (\<) 1 percent (%) per year, during the treatment period and for at least 18 months after the last dose of study drug. * For men: agreement to remain abstinent or use two adequate methods for contraception, including at least one method with failure rate of less than 1% per year during the treatment period and for at least 6 months (180 days) after the last dose of drug.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Mayo Clinic in Rochester
Rochester, Minnesota, 55905, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- New hope for rare kidney diseases: three drugs enter trial