A Study to Find Out if BI 764198 Helps Adults and Adolescents With a Kidney Condition Called Focal Segmental Glomerulosclerosis (FSGS)

Phase 3Not Yet RecruitingNCT07220083

Boehringer Ingelheim286 enrolled

Overview

This study is open to adults and adolescents with a kidney condition called focal segmental glomerulosclerosis (FSGS). The purpose of this study is to find out whether a medicine called BI 764198 helps people with FSGS. Participants are put into 2 groups randomly, which means by chance. Every participant has an equal chance of being in each group. One group takes BI 764198 tablets, and the other group takes placebo tablets. Placebo tablets look like BI 764198 tablets but do not contain any medicine. Participants take a tablet once a day for up to 2 years. All participants also continue their standard medication for FSGS. Participants are in the study for up to 2 years. During this time, they visit the study site about every 3 months. Participants regularly collect urine samples. This is done to check their kidneys. The results are compared between the two groups to see whether the treatment works. The doctors also regularly check participants' health and take note of any unwanted effects.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

286

Conditions

Focal Segmental Glomerulosclerosis

Interventions

Eligibility

Sex: ALLMin age: 12 Years

Medical Language ↔ Plain English

Inclusion criteria: 1. Male or female participants ≥12 years old on the day of signing informed consent/assent (Visit 1) 2. Weight of ≥40 kg at the screening visit (Visit 1) 3. Body mass index (BMI) of ≤40 kg/m² at the screening visit (Visit 1) 4. Participants with a diagnosis prior to the screening visit (Visit 1) of either: * Biopsy-confirmed primary focal segmental glomerulosclerosis (pFSGS) (based on Investigator's judgement) OR * Genetic focal segmental glomerulosclerosis (FSGS) resulting from a gain-of-function mutation in the transient receptor potential cation subfamily C member 6 (TRPC6) gene (based on historical genetic test) 5. Urine protein-creatinine ratio (UPCR) ≥1500 mg/g based on the mean of the spot urine sample and first morning void urine sample (both assessed by central laboratory) at the screening visit (Visit 1) 6. Estimated glomerular filtration rate (eGFR) * For adult participants (≥18 years): ≥25 mL/min/1.73 m² (chronic kidney disease epidemiology collaboration (CKD-EPI) formula based on combined serum creatinine plus cystatin C) at the screening visit (Visit 1) * For adolescent participants (12 to \<18 years); ≥25 mL/min/1.73 m² based on chronic kidney disease under 25 years (CKiD U25) formula using height and serum cystatin C at the screening visit (Visit 1) Further inclusion criteria apply. Exclusion criteria: 1. Known monogenic or syndromic causes of FSGS (with the exception of TRPC6 gain-of-function gene mutations) 2. Clinical or histologic evidence of secondary maladaptive or toxic forms of FSGS (based on Investigator's judgement) 3. FSGS of undetermined cause (FSGS-UC) with a diagnosis prior to the screening visit (Visit 1) (based on Investigator's judgement) 4. A history of organ transplantation or planned organ transplantation during the course of the trial 5. Use of intravenous immunosuppressive agents (e.g. cyclophosphamide, rituximab, obinutuzumab) in the last 6 months prior to screening (Visit 1) Further exclusion criteria apply.

Locations (205)

Alabama Kidney Research

Alabaster, Alabama, United States

Nephrology Consultants, LLC

Huntsville, Alabama, United States

Southwest Kidney Institute

Surprise, Arizona, United States

Amicis Research Center - Balboa

Granada Hills, California, United States

Academic Medical Research Institute - Glendale

Los Angeles, California, United States

Outcomes

Primary Outcomes

Relative change in 24-hour urinary protein-to-creatinine ratio (UPCR, measured in mg/g) from baseline to Week 104

Time frame: Baseline and Week 104

Secondary Outcomes

Key secondary endpoint: Absolute change in eGFRcys in mL/min/1.73m2 from baseline to Week 104

Estimated glomerular filtration rate based on serum cystatin C (eGFRcys)

Time frame: Baseline and Week 104

Key secondary endpoint: Treatment response, defined as 24-hr UPCR <1000 mg/g at Week 104

24-hour urinary protein-to-creatinine ratio (24-hr UPCR)

Time frame: At Week 104

Treatment response, defined as 24-hr UPCR <1000 mg/g and eGFRcys ≥85% vs. baseline at Week 104 and no treatment failure between randomisation and Week 104 (combined or multi-component endpoint)

24-hour urinary protein-to-creatinine ratio (24-hr UPCR), Estimated glomerular filtration rate based on serum cystatin C (eGFRcys). Treatment failure defined as one or more of the following: * Use of rescue therapy due to worsening or severely active disease leading to the Investigator concluding that the randomised treatment regimen has failed and requires additional treatment. * Presence of any of the following events: * End-stage renal disease * Receipt of a kidney transplant * Death * Intensification of concomitant medication used at screening. Therapies that are considered include: * Calcineurin inhibitors * Azathioprine * Mycophenolate mofetil * Glucocorticoids: Prednisolone dose escalated to a dose of ≥20 mg/d (oral or intravenous) or equivalent for more than 14 days for treatment of kidney disease

Time frame: At Week 104

Complete remission, defined as 24-hr UPCR <300 mg/g at Week 104

24-hour urinary protein-to-creatinine ratio (24-hr UPCR)

Time frame: At Week 104

Change from baseline across disease-specific clinical outcome assessment (COA) NS-SIM-PRO at Week 104

The nephrotic syndrome swelling impact measure (NS-SIM-PRO) has 23 items covering physical function (e.g. mobility), physical symptoms (e.g. fatigue, nausea), and essential function (e.g. vision) impacts identified as being important aspects of participants' experiences with nephrotic-syndrome related swelling. It is expected that all item responses will be combined to generate a single score representing overall swelling impact. The score ranges from 0 up to 4 (0 = never, 1 = almost never, 2 = sometimes, 3 = often, 4 = almost always). A lower score on any of the NS-SIM-PRO subscales indicate a better quality of life. The NS-SIM-PRO is applicable only for participants where the investigator confirms the participant is suffering from the symptom swelling at the time of assessment.

Time frame: Baseline and Week 104

Change from baseline across clinical outcome assessment (COA) KDQOL-36 at Week 104

Kidney disease quality of life 36-item short form survey (KDQOL-36) assessing the health-related quality of life (HRQOL) in adult participants with kidney disease. It combines the generic SF-12 Health Survey with additional items specifically relevant to kidney disease. Key Components: * SF-12 Health Survey: Includes 12 items that measure physical and mental health, providing a broad overview of the patient's general health status. * Burden of Kidney Disease: This subscale (4 items) assesses how much kidney disease interferes with daily life and causes frustration. * Symptoms/Problems: This subscale (12 items) evaluates the frequency and severity of symptoms related to kidney disease, such as pain, fatigue, and sleep disturbances. * Effects of Kidney Disease: This subscale (8 items) measures the impact of kidney disease on daily activities and overall well-being. The score ranges from 0 up to 6 and a higher score on most of the KDQOL-36 subscales indicate a better quality of life.

Time frame: Baseline and Week 104

A Study to Find Out if BI 764198 Helps Adults and Adolescents With a Kidney Condition Called Focal Segmental Glomerulosclerosis (FSGS)

Overview

Conditions

Interventions

Eligibility

Locations (205)

Outcomes

Primary Outcomes

Secondary Outcomes

Central Contacts