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RE-021

Phase 2

Focal Segmental Glomerulosclerosis | Small molecule | Nephrology |Travere Therapeutics, Inc.|Last Updated: May 15, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment109

FDA Designations

No designations recorded

Clinical trial landscape

RE-021 · 1 trial · 1 indication

Phase 2 1
NCT01613118Randomized, Double-Blind, Safety and Efficacy Study of RE-021 (Sparsentan) in Focal Segmental GlomerulosclerosisFocal Segmental Glomerulosclerosis
COMPLETED109 Analytics
PHASE2COMPLETED
Randomized, Double-Blind, Safety and Efficacy Study of RE-021 (Sparsentan) in Focal Segmental Glomerulosclerosis
Focal Segmental GlomerulosclerosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Percent Change in Urine Protein/Creatinine (Up/C)
8 weeks

Primary efficacy objective is to determine the change in UP/C in FSGS patients receiving RE-021 (Sparsentan) from baseline to 8 weeks over a range of dose levels compared to treatment with irbesartan as active control.

Secondary Endpoints

Percentage of Patients Achieving FSGS Partial Remission Endpoint (FPRE)
8 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
RE-021 (Sparsentan) 200 mg - Double-Blind PeriodEXPERIMENTALRE-021 (Sparsentan) will be administered as a single oral morning dose. In this ARM the RE-021 (Sparsentan) dose will be 200mg. Patients at \</= 50kg will receive half of the RE-021 (Sparsentan) dose for the 8 week duration.
RE-021 (Sparsentan) 400 mg - Double-Blind PeriodEXPERIMENTALRE-021 (Sparsentan) will be administered as a single oral morning dose. In this ARM the RE-021 (Sparsentan) dose will be 400mg. Patients at \</= 50kg will receive half of the RE-021 (Sparsentan) dose for the 8 week duration.
RE-021 (Sparsentan) 800 mg - Double-Blind PeriodEXPERIMENTALRE-021 (Sparsentan) will be administered as a single oral morning dose. In this ARM the RE-021 (Sparsentan) dose will be 800mg. Patients at \</= 50kg will receive half of the RE-021 (Sparsentan) dose for the 8 week duration.
Irbesartan 300 mg - Double-Blind PeriodACTIVE_COMPARATORThe control will be administered irbesartan as a single oral dose of 150mg for the first week before escalating to 300mg for the remaining 7 weeks. Patients at \</= 50kg will receive 150mg irbesartan for the 8 week duration.
RE-021 (Sparsentan) - Open-Label Extension PeriodEXPERIMENTALIncludes all subjects who completed the Double-Blind period and enrolled in the Open-Label Extension period of the study. All subjects who completed the Double-Blind period were evaluated for response and safety at the Week 8 visit to determine eligibility for continued treatment on their assigned doses in an Open-Label Extension period for up to 496 additional weeks. Subjects treated with irbesartan during the Double-Blind period were offered sparsentan treatment at the dose they would have received according to the Double-Blind dose cohort in which they were enrolled.

Interventions

NameTypeDescription
RE-021 (Sparsentan)DRUGOral, once-daily
IrbesartanDRUGOral, once-daily
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Eligibility Criteria

Age Range8 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites33

Inclusion Criteria 1. Biopsy-proven FSGS OR documentation of a genetic mutation in a podocyte protein associated with the disease. 2. Urine protein/creatinine ratio (Up/C) at or above 1.0 g/g. 3. Estimated glomerular filtration rate (eGFR) \>30. 4. Mean seated blood pressure (BP) \>100/60 mmHg and ...

Countries:United StatesCzechiaItaly
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Competitive Landscape -Focal Segmental Glomerulosclerosis 6 trials

Frequently asked questions about RE-021

What is RE-021 used for?

RE-021, also known as sparsentan, is an investigational small molecule being studied for the treatment of focal segmental glomerulosclerosis (FSGS), a kidney disorder. It has also been evaluated in healthy subjects for pharmacokinetic purposes. The drug is in clinical development by Travere Therapeutics, Inc. (NASDAQ: TVTX).

How does RE-021 work?

RE-021 (sparsentan) is a small molecule that targets the endothelin and angiotensin pathways. It acts as a dual endothelin receptor antagonist and angiotensin II receptor blocker, which may help reduce proteinuria and slow kidney damage in conditions like focal segmental glomerulosclerosis.

Who is developing RE-021?

RE-021 is being developed by Travere Therapeutics, Inc., a biopharmaceutical company listed on NASDAQ under the ticker TVTX. The company is conducting clinical trials to evaluate the drug's safety and efficacy in focal segmental glomerulosclerosis and its pharmacokinetics in healthy subjects.

What phase is RE-021 in?

RE-021 has completed a Phase 2 clinical trial in focal segmental glomerulosclerosis and a Phase 1 trial in healthy subjects. It is an investigational drug and has not been approved by regulatory authorities. The Phase 2 trial was randomized, double-blind, and active-controlled, enrolling 109 participants.

What clinical trials is RE-021 in?

RE-021 has been studied in two completed trials. NCT01613118 was a Phase 2 randomized, double-blind, safety and efficacy study in focal segmental glomerulosclerosis, enrolling 109 participants in the United States, Czechia, and Italy. NCT05562362 was a Phase 1 study evaluating the pharmacokinetics of oral sparsentan suspension in 47 healthy subjects in the United Kingdom.

Is RE-021 the same as sparsentan?

Yes, RE-021 is also known as sparsentan. Clinical trials for the drug use the name sparsentan in their titles, such as NCT01613118, which is titled 'Randomized, Double-Blind, Safety and Efficacy Study of RE-021 (Sparsentan) in Focal Segmental Glomerulosclerosis.'