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A Study of the Efficacy and Safety of DMX-200 in Patients With FSGS Who Are Receiving an ARB

A pivotal Phase 3, multicenter, randomized, double-blind, placebo-controlled study of the efficacy and safety of DMX-200 in patients with focal segmental glomerulosclerosis (FSGS) who are receiving an angiotensin II receptor blocker (ARB) - ACTION3

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031250150
Enrollment
20
Registered
2025-06-05
Start date
2025-09-26
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

focal segmental glomerulosclerosis (FSGS)

Interventions

Patients will take DMX-200 as 120 mg powder-in-capsules or matching placebo BID over a treatment period of up to 104 weeks during the double-blind period. During the OLE period, all patients will take

Sponsors

Fuller David
Lead Sponsor
FUSO Pharmaceutical Industries, Ltd
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: -Primary FSGS, genetic FSGS, or FSGS of undetermined cause (FSGS-UC) diagnosed within 7 years of screening. -Must be either receiving an ARB at the maximal tolerated dose and >=50% of the maximum recommended dose per the product label prior to Screening, or willing to transition to this treatment (including transition from an ACE inhibitor) prior to stabilization. -If taking corticosteroids, the dosage must be=4 weeks prior to and during both Screening and Stabilization, and there must be no plan to change their corticosteroid treatment regimen during study. Use of inhaled corticosteroids for respiratory diseases is allowed. -If taking aldosterone inhibitors, mineralocorticoid receptor antagonists, direct renin inhibitors, sodium-glucose co-transporter-2 inhibitors, or endothelin receptor antagonists (including dual antagonists), the dose and regimen must be stable for >=12 weeks prior to Screening and maintained during Stabilization and patients must have no plan to change their treatment regimen during the study. -Urine protein/creatinine ratio (PCR) >1.5 g/g (>169.5 mg/mmol) or 24-hour total protein >1.5 g/day based on 24-hour urine collection during Screening and Qualification. -Estimated glomerular filtration rate (eGFR) at screening: -For adults (>= 18 years): eGFR >=25 and =18 years of age) at Screening. -Body weight >=35 kg (all patients) AND a body mass index (BMI) =18 years of age) or at Screening. For patients with moderate or severe edema, BMI will be calculated based on remission or premorbid weight measured within 3 months prior to Screening, if available. If not available, BMI will be calculated based on the estimated dry weight, based on the Investigator's clinical judgment.

Exclusion criteria

Exclusion criteria: -Has FSGS secondary to another condition. -Patients with nephrotic syndrome (>3.5 g/day proteinuria and serum albumin 8%). History of lymphoma, leukemia, or any active malignancy within the past 2 years (except for basal cell or squamous cell carcinomas of the skin or cervical carcinoma in situ that have been resected and with no evidence of metastatic disease). -Active clinically significant hepatobiliary disease. -Documented history of heart failure (New York Heart Association Class III/IV) or a major adverse cardiac event within 12 weeks prior to Screening. -Serum potassium levels >5.5 mmol/L at Screening. -Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) >2 * upper limit of normal at Screening. -Received any of the following with the specified timeframe prior to Screening: Treatment with non-steroid immunosuppressant agents including biological drugs (eg rituximab), calcineurin inhibitors, cyclophosphamide, azathioprine, or mycophenolate mofetil within 12 weeks prior to Screening

Design outcomes

Primary

MeasureTime frame
-Percent change in urine PCR (based on 24-hour urine collection) from Baseline to Week 35 following treatment with DMX-200 compared with placebo -Slope of eGFR from Baseline to Week 104 following treatment with DMX-200 compared with placebo

Countries

ARGENTINA, AUSTRALIA, BRAZIL, CHINA, CZECH REP, DENMARK, FRANCE, GERMANY, HONG KONG, ITALY, Japan, MALAYSIA, MEXICO, NEW ZEALAND, PORTUGAL, SPAIN, TAIWAN, THAILAND, TURKEY, UK, USA

Contacts

Public ContactjRCT Inquiry Contact

IQVIA Services Japan G.K.

DMX-200-301_JapanCL@iqvia.com+81-3-6859-9500

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026