A Study to Test CRT-402 in Refractory Autoimmune Disease

August 19, 2026 updated by: Myeloid Therapeutics

A Phase 1/2 Dose Escalation and Expansion Study of CRT-402, an In Vivo CD19 Targeted CAR-T Therapy, in Refractory Autoimmune Disease

Patients with refractory autoimmune diseases often have limited treatment options and ongoing disease activity despite standard therapies. CRT-402 is an in vivo Cluster of differentiation 19 (CD19)-targeted CAR-T cell therapy designed to deplete CD19-positive B cells and promote immune system reset. This study evaluates the safety, tolerability, preliminary efficacy, pharmacodynamics (PD), and pharmacokinetics (PK) of CRT-402 in participants with active refractory systemic lupus erythematosus (SLE), systemic sclerosis (SSc), and idiopathic inflammatory myopathies (IIM).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet 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 multicenter, open-label, Phase 1/2, first-in-human, dose escalation and expansion study designed to assess the safety and tolerability, as well as define the recommended Phase 2 dose (RP2D) of CRT-402 in participants with refractory autoimmune disease.

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.
34

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
  • Phase 1

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 Locations

  • Australia
    • Western Australia
      • Nedlands, Western Australia, Australia, 6009
        • Linear Advanced Clinical Trial Centre, Ground Floor, B Block, Queen Elizabeth II Medical Centre, Hospital Avenue
        • Contact:
        • Principal Investigator:
          • Merrilee Needham

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:

  • Age 18 years or older.
  • Diagnosis of active, refractory systemic lupus erythematosus, systemic sclerosis, or idiopathic inflammatory myopathy meeting established classification criteria, with inadequate response or intolerance to standard therapy.
  • Adequate renal, hepatic, cardiac, and pulmonary function per protocol-defined criteria.
  • Participants of reproductive potential must agree to use protocol-specified contraception during the study and for a defined period after dosing.
  • Females of childbearing potential must have a negative pregnancy test before treatment.
  • Must be willing and able to attend study visits and follow all study requirements.

Exclusion Criteria:

  • Clinical suitability for a less burdensome and/or approved therapeutic approach, as judged by the Investigator,
  • Any medical condition or laboratory abnormality that, in the Investigator's judgment, would place the participant at unacceptable risk or confound interpretation of study data,
  • Prior Cluster of differentiation 19 (CD19)-directed, cell, or gene therapy,
  • History of bone marrow/ hematopoietic stem cell or solid organ transplantation,
  • Active or inadequately treated infection, including Human immunodeficiency (HIV), hepatitis B or C, or tuberculosis,
  • Pregnancy or lactation.

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

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: CRT-402
Participants will receive CRT-402 by intravenous infusion. Dose escalation will proceed according to protocol-defined safety criteria.
Drug: CRT-402
CRT-402 administered by intravenous infusion.

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
Incidence and severity of treatment-emergent adverse events (TEAEs), including serious adverse events (SAEs), and dose-limiting toxicities (DLTs).
Time Frame: Up to 52 weeks
Adverse events (AEs) are any new or worsening medical problems that occur after starting the study treatment.
Up to 52 weeks
Incidence and severity of cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS).
Time Frame: Up to 52 weeks
cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome ICANS will be graded using standard consensus criteria.
Up to 52 weeks

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
Assess emergence of anti-drug antibodies (ADAs)
Time Frame: Up to 52 weeks
Serum for anti-drug antibody analysis will be collected at designated visits indicated in the Schedule of Assessments (SOA). Samples will be collected using standard site practices.
Up to 52 weeks
Pharmacokinetic parameter: Maximum observed plasma concentration (Cmax)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Area under the curve (AUC)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Time to Maximum Concentration (tmax)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Plasma clearance (CL)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Volume of distribution (Vd)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Mean Residence Time (MRT)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Apparent terminal half-life (t1/2)
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Pharmacokinetic parameter: Terminal elimination rate constant (λz).
Time Frame: Day 1 through Day 22
Day 1 through Day 22
Overall Response Rate (ORR), measured by disease-specific composite response criteria.
Time Frame: Week 24
Week 24

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.
Myeloid Therapeutics

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.
CREATE Medicines

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 Director: Adam Raff, MD, PhD, SVP Clinical Development, CREATE Medicines

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 (Estimated)

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.
August 24, 2026

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.
December 1, 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.
August 1, 2029

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).
August 6, 2026

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.
August 19, 2026

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.
August 21, 2026

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.
August 21, 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.
August 19, 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.
August 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.
  • CRT-402-01

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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