A Study to Learn More About the Safety and Effects of Felzartamab in Adults With Lupus Nephritis Aged 18 to 75 Years Old

NCT06064929 | Active Not Recruiting Phase 1 DMC FDA Drug

• 2 other identifiers: 299LE101HIB-202-101
• Study Type: interventional
• Target: 14
• Locations: 4 countries
• Sites: 24

Brief Summary

In this study, researchers will learn more about the use of felzartamab in people with active lupus nephritis, also known as LN. In people with LN, antibodies build up in the glomeruli of the kidneys. Antibodies are proteins in the blood used by the immune system to fight infection. Glomeruli are small filters that remove waste and extra fluid from the blood. This buildup leads to inflammation and damage to the kidneys. Kidney damage can lead to too much protein and blood leaking into the urine. High levels of protein in the urine, called proteinuria, are common in people with LN. Symptoms of LN can include fever, swelling in the legs and body, and high blood pressure. If left untreated, LN can eventually lead to kidney failure. In this study, researchers will learn more about how a study drug called felzartamab affects people with LN. Felzartamab is a monoclonal antibody, which means it is an antibody made in a laboratory. Felzartamab can target immune cells that produce antibodies, helping to lower their buildup in the kidneys. The main goal of this study is to learn more about the safety of felzartamab and how it works in the body of people with LN who are taking standard of care. This will help researchers decide if they should do more studies with felzartamab in people with LN. Standard of care is the usual treatment or care given to patients for a disease, as prescribed by their doctor. The main question researchers want to answer in this study are:

• How many participants had adverse events during the study? An adverse event is a health problem that may or may not be caused by the study drug. It can happen during a clinical study or within a certain amount of time after the study has ended. Researchers will also learn more about:
• How much felzartamab affects proteinuria and the level of creatinine in the urine. Creatinine is a protein that is released into the blood from normal muscle wear and tear. Its levels can help doctors understand how well your kidneys are working.
• How many participants have a complete response. A complete response means that their urine protein levels decrease to a low level, and their kidney function stays stable.
• How many participants have a 50% decrease in the level of protein and creatinine in their urine.
• How much felzartamab affects the participants' lupus-related blood tests.
• How the body processes felzartamab.
• How many participants develop antibodies against felzartamab in the blood. This study will be done as follows:
• Participants will be screened to check if they can join the study. The screening period will be up to 42 days.
• Throughout the study, all participants will continue taking their standard of care, as prescribed by their doctor.
• There are 2 parts in this study. In both parts, participants will receive felzartamab through an intravenous infusion, also known as an IV. This means it is being given into a vein.
• In Part 1, participants will have up to 14 visits to their study research center. In Part 2, participants may have up to 15 visits.
• Each participant will be in the study for about 2 years.

Conditions

Lupus Nephritis

Keywords

Felzartamab; LN; Systemic Lupus Erythematosus; Lupus; Refractory LN

Outcome Measures

Primary Outcomes (1)

• Number of Participants with Adverse Events

  Up to Week 104

Secondary Outcomes (10)

• Change from Baseline in Urine Protein:Creatinine Ratio (UPCR)

  Baseline, Up to Week 104

• Proportion of Participants Who Achieve a Complete Renal Response (CRR)

  Week 24

• Proportion of Participants Who Achieve Overall Complete and Partial Renal Response (PRR: CRR+PRR)

  Week 24

• Change from Baseline in Serum Creatinine

  Baseline, Up to Week 104

• Change from Baseline in Urine Protein

  Baseline, Up to Week 104

Study Arms (1)

Felzartamab

EXPERIMENTAL

Participants will receive two courses of multiple intravenous (IV) doses of felzartamab, separated by a 28-week off-treatment period. These courses are given in Part 1 and Part 2 of the trial.

Drug: Felzartamab

Interventions

Felzartamab DRUG

Administered IV

Also known as: HIB202, BIIB148, MOR202, MOR03087, TJ202

Felzartamab

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Part 1
• Diagnosis of Systemic Lupus Erythematosus (SLE) according to the 2019 European League Against Rheumatism (EULAR)/ American College of Rheumatology (ACR) criteria
• Diagnosis of International Society of Nephrology/ Renal Pathology Society (ISN/RPS) 2003 Class III or IV LN as evidenced by renal biopsy performed within 1 year prior to or during screening, either with or without the presence of Class V LN
• Proteinuria (urine protein to creatinine ratio) \> 1.0 gram per gram (g/g), based on 24-hour urine collection during screening
• eGFR ≥ 45 milliliter/minute/1.73 square meters (mL/min/1.73 m\^2) (as calculated by the Chronic Kidney Disease Epidemiology Collaboration formula)
• If eGFR is ≥35 to \<45 mL/min/1.73m\^2, renal biopsy must be within 6 months of screening and must not have \>50% of glomeruli with sclerosis. If the renal biopsy was performed more than 6 months prior to screening, a repeat biopsy must be done during screening after all the other eligibility criteria are met
• If eGFR is ≥45 mL/min/1.73 m\^2, renal biopsy must be within 1 year prior to screening. If the renal biopsy was performed more than 1 year prior to screening, a repeat biopsy must be done during screening after all the other eligibility criteria are met
• History of inadequate response, for lack of efficacy or intolerance, to at least a three-month course of one standard of care treatment for lupus nephritis, as determined by the treating physician
• Part 2
• Participants must complete Part 1 of the study to be eligible to participate in Part 2.

You may not qualify if:

• Part 1
• Presence of rapidly progressive glomerulonephritis, as defined by at least one of the following: crescent formation in \> 50% of glomeruli on renal biopsy, sustained doubling of serum creatinine within 12 weeks of screening, or the investigator's opinion that the participant has rapidly progressive glomerulonephritis
• Greater than 50% of glomeruli with sclerosis on renal biopsy
• Currently requiring hemodialysis or peritoneal dialysis or expected to require dialysis during the study treatment period
• A previous kidney transplant or other organ transplant, or planned transplant within study treatment period
• Part 2
• Did not complete Part 1 of the study
• Received protocol-prohibited medications in Part 1 such as calcineurin inhibitors (e.g., cyclosporine, tacrolimus, or voclosporin), alkylating agents including cyclophosphamide, or biologic agents other than felzartamab
• Progression of LN (as measured by worsening proteinuria and/or decreasing eGFR) has been observed such that in the opinion of the investigator the participant will not benefit from continuing in Part 2 of the study

Sponsors & Collaborators

• HI-Bio, A Biogen Company: lead

Study Sites (24)

University of California, San Diego (UCSD)

La Jolla, California, 92037, United States

Location

University of California, San Francisco (UCSF)

San Francisco, California, 94143, United States

Location

Stanford University Medical Center

Stanford, California, 94305, United States

Location

ClinCept, LLC/River City Vascular Specialists LLC

Columbus, Georgia, 31904, United States

Location

Georgia Nephrology - Lawrenceville

Lawrenceville, Georgia, 30046, United States

Location

University of Michigan

Ann Arbor, Michigan, 48109, United States

Location

Joseph S. and Diane H. Steinberg Ambulatory Care Center

Brooklyn, New York, 11201, United States

Location

SUNY Downstate Medical Center

Brooklyn, New York, 11203, United States

Location

University Hospitals Cleveland Medical Center

Cleveland, Ohio, 44106, United States

Location

The Ohio State University (OSU)

Columbus, Ohio, 43210, United States

Location

Precision Comprehensive Clinical Research Solutions - Grapevine

Grapevine, Texas, 76051, United States

Location

Prolato Clinical Research Center

Houston, Texas, 77054, United States

Location

Accurate Clinical Research - Katy

Katy, Texas, 77449, United States

Location

R & H Clinical Research

Katy, Texas, 77450, United States

Location

Hospital Britanico de Buenos Aires

Caba, Buenos Aires F.D., C1280AEB, Argentina

Location

CEMIC

CABA, Buenos Aires F.D., C1431FWO, Argentina

Location

Clinica Priv Velez Sarsfield

Córdoba, Córdoba Province, X5016, Argentina

Location

Westmead Hospital

Westmead, New South Wales, 2145, Australia

Location

Princess Alexandra Hospital

Woolloongabba, Queensland, 4102, Australia

Location

Monash Health

Melbourne, Victoria, 3168, Australia

Location

Western Health

Saint Albans, Victoria, 3021, Australia

Location

St. Paul's Hospital

Vancouver, British Columbia, V6Z1Y6, Canada

Location

University Health Network - Toronto General Division

Toronto, Ontario, MST258, Canada

Location

Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM)

Montreal, Quebec, H2X 3J4, Canada

Location

MeSH Terms

Conditions

Lupus Nephritis; Lupus Erythematosus, Systemic

Interventions

felzartamab

Condition Hierarchy (Ancestors)

Glomerulonephritis; Nephritis; Kidney Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Male Urogenital Diseases; Connective Tissue Diseases; Skin and Connective Tissue Diseases; Autoimmune Diseases; Immune System Diseases

Study Officials

• Medical Director

  HI-Bio, A Biogen Company

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 26, 2023
• First Posted: October 3, 2023
• Study Start: November 1, 2023
• Primary Completion (Estimated): June 30, 2026
• Study Completion (Estimated): June 30, 2026
• Last Updated: December 31, 2025

Record last verified: 2025-12

Data Sharing

• IPD Sharing: Will share

Locations

AR (3); CA (3); US (14); AU (4)