Dapansutrile in Diabetes and Diabetes-Related Complications - Dapan-Dia (Dapan-Dia)

February 23, 2026 updated by: Marc Donath

A Multi-Centre, Randomised, Double-Blind, Placebo-Controlled Trial of the Safety and Efficacy of the Oral NLRP3 Inhibitor Dapansutrile in Subjects With Type 2 Diabetes Mellitus

The aim of the study is to determine whether NLRP3 inhibition with dapansutrile represents a new pharmacological option for diabetes management with potential as an anti-inflammatory agent to also address micro- and macro-vascular risk and complications from diabetes.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

To date, no other oral NLRP3 inhibitor has sufficiently advanced in development to be tested in a chronic low-grade inflammatory disease such as type 2 diabetes mellitus over a period of 3 to 4 months as proposed in this trial. Based on the publicly available information, dapansutrile is the most advanced oral NLRP3 inhibitor in development. The rationale is built upon dapansutrile's clinical and extensive preclinical and safety findings, and from data in chronic animal toxicology studies to date, which together enable and support its investigation in select chronic low-grade inflammatory diseases. Therefore, the investigators have selected type 2 diabetes mellitus and its complications, including risk for cardiovascular disease, as a disease with clinical features of low-grade inflammation to further investigate the therapeutic potential of NLRP3 inhibition with dapansutrile.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Belgium
      • Liège, Belgium, 4000
  • France
    • Île-de-France Region
      • Paris, Île-de-France Region, France, 75010
        • Recruiting
        • Hôpital Lariboisière
        • Contact:
      • Paris, Île-de-France Region, France, 75018
        • Recruiting
        • Hôpital Bichat
        • Contact:
  • Germany
    • Nordrhein-Westphalen
      • Düsseldorf, Nordrhein-Westphalen, Germany, 40225
        • Recruiting
        • Deutsches Zentrum für Diabetesforschung Düsseldorf
        • Contact:
          • Michael Roden, Prof. Dr. med.
          • Phone Number: +49 211 3382-0
          • Email: kontakt@ddz.de
  • Switzerland
    • Basel
      • Basel, Basel, Switzerland, 4031
        • Terminated
        • University Hospital Basel
    • Canton of Solothurn
      • Olten, Canton of Solothurn, Switzerland, 4600
        • Recruiting
        • Kantonsspital Olten
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Diagnosis of type 2, Diabetes mellitus as defined by the criteria of the American Diabetes Association (ADA) Expert Committee on the Diagnosis and Classification of Diabetes Mellitus (see Appendix 1) and recognized by the World Health Organization (WHO, 2019), for at least 3 months prior to the Baseline Visit/Day 1
  • HbA1c value of ≥ 7.7% to ≤ 11.0% at the Screening Visit.
  • High-sensitivity C-reactive protein (hsCRP) ≥ 1.5 mg/L at the Screening Visit.
  • Body mass index (BMI) ≥25 to ≤ 40 kg/m2 at the Screening Visit
  • Acceptable overall medical condition to safely participate in the study and complete all study procedures (particularly with regard to cardiovascular, renal, and hepatic conditions), in the opinion of the Investigator

Exclusion Criteria:

  • Diagnosis of type 1 diabetes mellitus
  • HbA1c value of ≤ 7.5% or ≥ 10.5% at the Baseline Visit/Day 1, as determined at point of care (local laboratory)
  • Use of thiazolidinediones (glitazones), pramlintide, or short-acting insulin/insulin analogues (as bolus or premixed insulin) within 12 weeks prior to the Screening Visit
  • Less than 80% compliance in taking investigational medicinal product by pill count during the Run-In Period, as assessed at the Baseline Visit/Day 1
  • Significant weight loss (> 5 kg) in the 12 weeks prior to the Screening Visit
  • Systolic blood pressure (BP) ≥ 160 mmHg, diastolic BP ≥ 100 mmHg, or resting heart rate (HR) ≥ 100 beats/minute at the Screening Visit
  • Previous myocardial infarction, any cardiac surgery

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Intervention Group
1000 mg dapansutrile (2 × 500mg tablets) administered twice a day from day 1 through the week 26 visit, inclusive. All tablets will be self-administered by mouth with water, with or without food.
Drug: Dapansutrile
Patients receive investigational product.
Other Names:
  • OLT1177
  • 3-methanesulfonyl-propionitrile
Placebo Comparator: Control Group
Matching placebo (2 tablets) administered twice a day from day 1 through the Week 26 visit, inclusive. All tablets will be self-administered by mouth with water, with or without food.
Drug: Placebo
Patients receive placebo.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in HbA1c in blood of patients for dapansutrile compared to placebo
Time Frame: two time assessment at baseline and week 26
Comparison of change in HbA1c for dapansutrile and placebo
two time assessment at baseline and week 26

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in fasting plasma glucose for dapansutrile compared to placebo
Time Frame: seven time assessement at baseline and week 4, 8, 12, 16, 20, 26
Comparison of change in fasting plasma glucose for dapansutrile and placebo
seven time assessement at baseline and week 4, 8, 12, 16, 20, 26
Change in HbA1c in blood of patients for dapansutrile compared to placebo
Time Frame: six time assessment at baseline and week 4, 8, 12, 16, 20
Comparison of change in HbA1c for dapansutrile and placebo
six time assessment at baseline and week 4, 8, 12, 16, 20

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Marc Donath

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Olatec Therapeutics LLC
State Secretariat for Education Research and Innovation, Switzerland
European Union (Horizon Europe Programme)
Departement Klinische Forschung Universität Basel
CTU Kantonsspital Baden

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Marc Y. Donath, Prof., Kantonsspital Baden, Switzerland

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 9, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
July 31, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
July 31, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 14, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 14, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 21, 2023

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 25, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 23, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2023-01387; kt23Donath

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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