A Study of LUCAR-G79D in Subjects With Relapsed/Refractory Systemic Lupus Erythematosus (r/r SLE) and Idiopathic Inflammatory Myopathies (r/r IIM)

January 29, 2026 updated by: Nanjing Legend Biotech Co.

An Open-label Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of LUCAR-G79D in Subjects With Relapsed/Refractory Systemic Lupus Erythematosus (r/r SLE) and Idiopathic Inflammatory Myopathies (r/r IIM)

This is a prospective, single-arm, open-label and dose-escalation investigator initialed study to evaluate LUCAR-G79D in adult subjects with r/r SLE and r/r IIM.

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

This is a prospective, single-arm, open-label clinical study to evaluate the safety, tolerability, pharmacokinetics and efficacy profiles of LUCAR-G79D, a chimeric antigen receptor (CAR) -T cell therapy in subjects with r/r SLE and r/r IIM. Patients who meet the eligibility criteria will receive LUCAR-G79D infusion. The study will include the following sequential stages: screening, pre-treatment (lymphodepleting chemotherapy), treatment (LUCAR-G79D infusion) and follow-up.

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.
38

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 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 Locations

  • China
    • Anhui
      • Bengbu, Anhui, China
        • Recruiting
        • The Third The People's Hospital of Bengbu
        • Contact:
    • Guangdong
      • Guangzhou, Guangdong, China
        • Not yet recruiting
        • Nanfang Hospital
        • Contact:
    • Hunan
      • Changsha, Hunan, China
        • Not yet recruiting
        • Xiangya Hospital of Central South University
        • Contact:
    • Jiangsu
      • Xuzhou, Jiangsu, China
        • Recruiting
        • The Affiliated Hospital of Xuzhou Medical University
        • Contact:
    • Jiangxi
      • Nanchang, Jiangxi, China
        • Not yet recruiting
        • The First Affiliated Hospital of Nanchang University
        • Contact:
        • 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:

  1. Subjects voluntary agreement to provide written informed consent.
  2. Aged 18 to 70 years, either sex.
  3. Adequate organ function meet screening criteria.
  4. Positive test for cluster of differentiation antigen 19 (CD19).

SLE:

  • Have been diagnosed of SLE at least 6 months before screening.
  • At screening, antinuclear antibody, and/or anti-dsDNA antibody, and/or anti-Smith antibody should be positive.
  • Fulfill relapsed/refractory SLE conditions.

IIM:

  • Have been diagnosed of IIM before screening.
  • Positive test for myositis-associated antibodies or myositis-specific antibodies at screening.
  • Fulfill relapsed/refractory IIM conditions.

Exclusion Criteria:

  1. Active infections such as hepatitis and tuberculosis.
  2. Other autoimmune diseases.
  3. Serious underlying diseases such as tumor, uncontrolled diabetes.
  4. Female subjects who were pregnant, breastfeeding.
  5. Those with a history of major organ transplantation.

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: Chimeric antigen receptor T cells (LUCAR-G79D)
Each subject will be given a single-dose LUCAR-G79D cells infusion at each dose level.
Biological: LUCAR-G79D T cells
Prior to infusion of the LUCAR-G79D T cells, subjects will receive a conditioning premedication regimen consisting of cyclophosphamide and fludarabine.

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
Time Frame
Incidence, severity, and type of treatment-emergent adverse events (TEAEs)
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)
Incidence of dose-limiting toxicity (DLT)
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)
Maximum concentration (Cmax) in peripheral blood
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)
Time of maximum concentration (Tmax) in peripheral blood
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)
Area under the concentration-time curve (AUC) in peripheral blood
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)
Recommended Dose regimen finding
Time Frame: 2 years after LUCAR-G79D infusion (Day 1)
2 years after LUCAR-G79D infusion (Day 1)

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 Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) scores from baseline up to 52 weeks for r/r SLE subjects
Time Frame: 52 weeks after LUCAR-G79D infusion (Day 1)
SLEDAI-2K is a scale ranging from 0 to 105 points, with higher scores indicating stronger disease activity
52 weeks after LUCAR-G79D infusion (Day 1)
Change in manual muscle testing (MMT-8) scores from baseline up to 52 weeks for r/r IIM subjects
Time Frame: 52 weeks after LUCAR-G79D infusion (Day 1)
MMT-8 is a scale ranging from 0 to 80 points, with higher scores indicating greater preserved muscle strength
52 weeks after LUCAR-G79D infusion (Day 1)
Changes from baseline in peripheral blood immunoglobulins from baseline up to 52 weeks for all subjects
Time Frame: 52 weeks after LUCAR-G79D infusion (Day 1)
Including IgG、IgM、IgA、IgE
52 weeks after LUCAR-G79D infusion (Day 1)
Changes from baseline in anti-drug antibody from baseline up to 52 weeks for all subjects
Time Frame: 52 weeks after LUCAR-G79D infusion (Day 1)
52 weeks after LUCAR-G79D infusion (Day 1)

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.
Nanjing Legend Biotech Co.

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.
January 29, 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.
January 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.
January 31, 2030

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).
December 15, 2025

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.
December 30, 2025

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.
January 9, 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.
February 2, 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.
January 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.
January 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.
  • LB2404D-0001

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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