Study to Evaluate the Efficacy, Safety and Tolerability of MAS825 in Patients With Monogenic IL-18 Driven Autoinflammatory Diseases, Including NLRC4-GOF, XIAP Deficiency, or CDC42 Mutations (MASter-1)

July 29, 2026 updated by: Novartis Pharmaceuticals

A Three-period Multicenter Study, With a Randomized-withdrawal, Double-blind, Placebo-controlled Design to Evaluate the Clinical Efficacy, Safety and Tolerability of MAS825 in Patients With Monogenic IL-18 Driven Autoinflammatory Diseases, Including NLRC4-GOF, XIAP Deficiency, or CDC42 Mutations

This study is a Phase 2 trial designed to evaluate the clinical efficacy, safety, and tolerability of MAS825 in patients with NLRC4-GOF, XIAP deficiency, or CDC42 mutations.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not 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

This is a three-period study, with an open-label, single-arm active treatment in Period 1 followed by a randomized-withdrawal, double-blinded, placebo-controlled design in Period 2, and an open label, long-term safety follow-up in Period 3, Period 3s, & Period 3s open label extension.

The total study duration is up to approximately 11 years.

Patients who enter Period 2 will be randomized to MAS825 or matching placebo in a 1:1 ratio.

Cohort 1 patients will complete all periods of the study.

Cohort 2: Patients who are receiving MAS825 in a Novartis Managed Access Program with a diagnosis of NLRC4-GOF, XIAP deficiency, or CDC42 mutation who meet criteria will be eligible to directly enter into Period 3 open-label long-term safety follow-up. They can continue into Period 3s, and Period 3s open-label extension.

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 (Actual)

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.
17

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

  • Name: Novartis Pharmaceuticals
  • Phone Number: +41613241111

Study Locations

  • Czechia
      • Prague, Czechia, 150 06
        • Ustav Imunologie 2 LF UK a FN Motol
    • CZ
      • Prague, CZ, Czechia, 121 00
        • Centrum detske revmatologie a autoinflamatornich onemocneni
  • France
      • Paris, France, 75970
        • Novartis Investigative Site
  • Italy
    • RM
      • Roma, RM, Italy, 00165
        • Bambino Gesu Hospital
  • Japan
      • Chiba, Japan, 266-0007
        • Novartis Investigative Site
  • Spain
      • Madrid, Spain, 28046
        • Novartis Investigative Site
  • United Kingdom
      • London, United Kingdom, NW3 2QG
        • Novartis Investigative Site
      • London, United Kingdom, WC1N 3JH
        • Great Ormond Street Hospital
  • United States
    • Ohio
      • Cincinnati, Ohio, United States, 45229
        • Cincinnati Children's Hospital
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104
        • Children´s Hospital of Philadelphia
    • Texas
      • Houston, Texas, United States, 77030
        • Texas Children´s Hospital
    • Washington
      • Seattle, Washington, United States, 98105
        • Seattle Children´s Hospital

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

For all Patients:

  1. Male and female patients weighing at least 3 kg

  2. Written informed consent by parent(s)/legal guardian(s) for the pediatric patients and assent by the pediatric patient (depending on local requirements) must be obtained before any study-specific assessment is performed. For adult patients, written informed consent by patients capable of giving consent, or when the patient is not capable of giving consent, by his/her legal/authorized representative (if allowed according to local requirements).

    Cohort 1 specific inclusion criteria:

  3. Patients with a genetic diagnosis of either NLRC4-GOF, XIAP deficiency, or CDC42 mutation
  4. Clinical history and investigations consistent with autoinflammation and infantile enterocolitis (AIFEC/NLRC4-GOF), XIAP or CDC42. XIAP patients must have persistent disease or be resistant to escalating therapy.

  5. At first treatment, evidence of active disease as assessed by inflammatory markers and PGA

    Cohort 2 specific inclusion criteria:

  6. Patients with a genetic diagnosis of NLRC4-GOF, XIAP deficiency, or CDC42 mutations who are being treated with MAS825 in a Novartis Managed Access Program (MAP).

Exclusion Criteria:

  1. History of hypersensitivity to any of the study drugs or to drugs of similar chemical classes or to any of the excipients.

  2. Signs and symptoms, in the judgment of the investigator, of clinically significant active bacterial, fungal, parasitic or viral infections, excluding chronic Epstein-Barr Virus (EBV).

    - COVID-19 specific: If in line with health and governmental authority guidance, it is highly recommended that testing to exclude COVID-19 using PCR or comparable approved methodology be completed within 1 week prior to first dosing.

  3. Any conditions or significant medical problems, which in the opinion of the investigator places the patient at unacceptable risk for MAS825 therapy
  4. Previous treatment with anti-rejection and/or immunomodulatory drugs within the past 28 days or 5 half-lives (whichever is the longer) for immunomodulatory therapeutic antibodies (or as listed in the prohibited medications section) prior to MAS825 treatment with the exceptions of glucocorticoids, cyclosporin and targeted binding or blocking therapies.
  5. A positive HIV test result at Screening. Evidence of prior testing within 3 months is sufficient.
  6. A positive Hepatitis B surface antigen (HBsAg) or Hepatitis C test result at Screening. Evidence of prior testing within 3 months is sufficient.
  7. Presence of tuberculosis infection as defined by a positive TB test at Screening. Evidence of prior testing within 3 months is sufficient.
  8. Live vaccinations within 1 month prior to MAS825 treatment, during the trial, and up to 3 months following the last dose.
  9. Pregnant or nursing (lactating) females.
  10. Female patients of child-bearing potential (or Tanner stage 2 or above) who are or might become sexually active, agree to use highly effective contraceptive methods to prevent pregnancy while on MAS825 therapy
  11. Patients weighing >160 kg at Screening.
  12. For CDC42 mutation patients: Takenouchi-Kosaki syndrome - CDC42 mutations associated with a diverse syndrome characterized by variable development delays, cardiac, brain and hematological abnormalities.

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: Triple

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.
Placebo Comparator: Placebo
matching placebo
Biological: Placebo
matching placebo
Experimental: MAS825
Experimental drug
Biological: MAS825
Experimental drug

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
Cohort 1: Occurrence of disease flare in patients with MAS825 treated patients compared with placebo during Period 2 assessed by Physician's Global Assessment and inflammatory markers
Time Frame: Period 2 (during the randomized, placebo-controlled period of up to 6 months)
To determine the efficacy of MAS825 in prevention of flares in patients with monogenic IL-18 driven autoinflammatory diseases, including NLRC4-GOF, XIAP deficiency or CDC42 mutations
Period 2 (during the randomized, placebo-controlled period of up to 6 months)

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
All cohorts: Number and severity of safety assessments and adverse events
Time Frame: Screening through EOS (End of Study) (up to approximately 11 years)
To evaluate the safety and tolerability of MAS825
Screening through EOS (End of Study) (up to approximately 11 years)
All cohorts: Confirmation of serological markers of MAS825
Time Frame: Day 1 through EOS (up to approximately 11 years)
Evaluate the serological markers of MAS825
Day 1 through EOS (up to approximately 11 years)
Cohort 1: PGA and inflammatory markers
Time Frame: Day 29, end of Period 1 (approximately 6 months), end of Period 2 (year 1), end of Period 3 (year 4), and end of Period 3s (up to year 6)
Evaluate the efficacy of MAS825 to improve the clinical status of patients with NLRC4-GOF, XIAP deficiency or CDC42 mutations
Day 29, end of Period 1 (approximately 6 months), end of Period 2 (year 1), end of Period 3 (year 4), and end of Period 3s (up to year 6)
Cohort 1: Serological remission via inflammatory markers
Time Frame: Day 29, end of Period 1 (up to 6 months), and end of Period 2 (year 1), end of Period 3 (year 4), and end of Period 3s (up to year 6)
Evaluate efficacy of MAS825 to achieve serological remission
Day 29, end of Period 1 (up to 6 months), and end of Period 2 (year 1), end of Period 3 (year 4), and end of Period 3s (up to year 6)
Cohort 1: Glucocorticoid therapy <0.2mg/kg by end of period 1
Time Frame: End of Period 1 (approximately 6 months)
Evaluate the effect of MAS825 on concomitant glucocorticoid administration
End of Period 1 (approximately 6 months)
Cohort 1: Time to first flare
Time Frame: Period 2 (during the randomized, placebo-controlled period of up to 6 months)
Evaluate effect of MAS825 on the time to first flare
Period 2 (during the randomized, placebo-controlled period of up to 6 months)
All cohorts: Physician Severity Assessment of Disease Signs and Symptoms scale (PSADSS)
Time Frame: Screening through EOS (up to approximately 11 years)
Evaluate the efficacy of MAS825 to improve signs and symptoms of the disease
Screening through EOS (up to approximately 11 years)
All cohorts: Patient / Parent global assessment of disease activity (PPGA) scale
Time Frame: Screening through EOS (up to approximately 11 years)
Evaluate effect of MAS825 on patient reported outcomes over time
Screening through EOS (up to approximately 11 years)

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.
Novartis Pharmaceuticals

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.
December 18, 2020

Primary Completion (Actual)

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.
October 14, 2025

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.
November 23, 2032

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).
November 20, 2020

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.
November 20, 2020

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.
November 23, 2020

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.
July 31, 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.
July 29, 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.
July 1, 2026

More Information

Terms related to this study

Keywords

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.
  • CMAS825D12201

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations.

This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

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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