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A Phase 2 Trial of Dotinurad in Xanthine Oxidase Inhibitor (XOI) Intolerant/Uricase Failure Gout Participants

A Phase 2, Randomized, Double-blind, Placebo-controlled, Multicenter Study to Evaluate the Efficacy and Safety of Dotinurad in Adult Participants With Gout Who Are Intolerant to Xanthine Oxidase Inhibitors or Failed Uricase Treatment

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07535034
Enrollment
90
Registered
2026-04-16
Start date
2026-05-08
Completion date
2027-08-01
Last updated
2026-09-03

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

Conditions

Gout

Keywords

Dotinurad, Xanthine Oxidase Inhibitors

Brief summary

The primary objective of this trial is to evaluate the efficacy of dotinurad in lowering serum uric acid (sUA) at Week 24 in participants with gout who are XOI intolerant or have failed uricase treatment.

Interventions

Over-encapsulated tablets containing active drug substance administered orally.

OTHERPlacebo

Capsules containing microcrystalline cellulose administered orally.

Sponsors

Crystalys Therapeutics
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

1. Between 18 and 75 years of age (inclusive) at the time of signing informed consent. 2. Diagnosis of gout based on 2015 American College of Rheumatology (ACR)-European Union League Against Rheumatism (EULAR) criteria for at least 1 year and has at least 1 of the following: * History (either by medical record or participant interview) of intolerance or a contraindication to either allopurinol or febuxostat. * Failed uricase treatment (eg, an sUA level \>6.0 mg/dL at least 2 weeks after last infusion; intolerant or contraindicated to uricase treatment). 3. sUA level \>6.0 and \<10.5 mg/dL at both Screening Visit 1 (Day -28 Visit) and Screening Visit 2 (Day -7 Visit). 4. Female participants of childbearing potential must have a negative serum pregnancy test at Screening Visit 1 (Day -28 Visit), a negative urine pregnancy test on Day 1, and must not be breastfeeding. 5. Fertile male participants and female participants of childbearing potential must be willing to completely abstain from heterosexual sex or agree to use acceptable contraception from the time of signing informed consent through 30 days after the last dose of trial drug.

Exclusion criteria

1. History of or presence of kidney stones within 1 year prior to Screening. 2. History of or presence of malignancy in the last 5 years other than treated cutaneous basal or squamous cell carcinoma. 3. Known or suspected history of drug abuse, a positive drug test at Screening Visit 1, or a recent history of alcohol abuse. 4. Known history of or positive results for human immunodeficiency virus (HIV), Hepatitis B surface antigen (HBsAg), or Hepatitis C virus (HCV) during Screening. 5. Current or historical evidence of any clinically significant disease or condition that, in the opinion of the Investigator, may compromise participant safety or trial compliance or may confound interpretation of trial results.

Design outcomes

Primary

MeasureTime frame
Percentage of Participants With an sUA Level <6.0 mg/dL at Week 24Week 24

Secondary

MeasureTime frameDescription
Percentage of Participants With an sUA Level <6.0 mg/dL at Weeks 16, 20 and 24Weeks 16, 20 and 24
Percentage of Participants With an sUA Level <6.0 <5.0, <4.0, and <3.0 mg/dL at Each VisitUp to Week 40
Mean Change From Baseline in sUA at Week 24Baseline and Week 24
Absolute Change from Baseline in sUA Levels at Each VisitBaseline to Week 40
Percent Change from Baseline in sUA Levels at Each VisitBaseline to Week 40
Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) in Treatment Periods 1 and 2Screening to Week 36Any clinically significant changes from baseline in safety laboratory values and vital signs will be reported as AEs per investigators discretion.
Number of Participants With TEAEs and SAEs Throughout the StudyScreening to Week 40Any clinically significant changes from baseline in safety laboratory values and vital signs will be reported as AEs per investigators discretion.

Countries

United States

Contacts

CONTACTClinical Trial Lead
ClinicalTrials@crystalystx.com1-858-379-2316

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 4, 2026