A Clinical Study to Evaluate LVIVO-TaVec400 for the Treatment of Relapsed/Refractory Autoimmune Diseases

May 7, 2026 updated by: Qiubai Li, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

A Clinical Study to Evaluate Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of the LVIVO-TaVec400 in the Treatment of Relapsed/Refractory Autoimmune Diseases

This is a prospective, single-arm, open-label dose-escalation clinical study to evaluate LVIVO-TaVec400 in the treatment of relapsed/refractory autoimmune diseases.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

This is a prospective, single-arm, open-label dose-escalation and dose-expansion study, designed to evaluate the safety, tolerability, pharmacokinetics, and preliminary efficacy of the LVIVO-TaVec400, an in vivo chimeric antigen receptor (CAR) -T cell therapy in subjects with relapsed/refractory autoimmune diseases. The subject who meets the defined eligibility criteria will follow the sequential stages: screening, treatment (LVIVO-TaVec400 infusion) and follow-up (Up to 15 years).

Study Type

Interventional

Enrollment (Estimated)

44

Phase

  • Early 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 Backup

Study Locations

  • China
    • Anhui
      • Hefei, Anhui, China
        • The First Affiliated Hospital of Anhui Medical University
        • Contact:
    • Beijing Municipality
      • Beijing, Beijing Municipality, China
        • Beijing Tiantan Hospital, Capital Medical University
        • Contact:
    • Hubei
      • Wuhan, Hubei, China
        • Union Hospital Tongji Medical College Huazhong University of Science and Technology
        • Contact:
    • Shanxi
      • Taiyuan, Shanxi, China
        • Shanxi Bethune Hospital
        • 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

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Subjects voluntarily participate in clinical studies.
  • Age 18-65 years.
  • Adequate organ function at screening.

  • Clinical laboratory values meet criteria at screening visit.

    r/r SLE:

  • Patients meet the 2019 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) OR 2012 Systemic lupus international collaborating clinics (SLICC) classification criteria for 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.

    r/r IgG4-RD：

  • Patients meet the 2019 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) classification criteria for IgG4-RD.
  • Fulfill relapsed/refractory IgG4-RD conditions.
  • Patients have active disease: IgG4-RD Response Index (RI) ≥2.

Progressive MS：

  • Diagnosis of MS according to 2017 revised McDonald criteria.
  • Progressive MS according to clinical course criteria revised in 2013.

  • Presence of Cerebrospinal fluid (CSF) oligoclonal bands (OCBs) or elevated IgG Index at screening.

    r/r MG：

  • Diagnosis of MG.
  • Myasthenia Gravis Foundation of America (MGFA) Class II-IV.
  • Positive AChR-IgG or MuSK-IgG at screening.
  • Fulfill refractory MG conditions.

Exclusion Criteria:

  • Active infections such as hepatitis and tuberculosis.
  • Coexist other autoimmune or inflammatory diseases.
  • Severe underlying diseases such as tumor, uncontrolled diabetes and severe heart diseases.
  • Female subjects who are pregnant, breastfeeding, or planning to become pregnant while participating in this study or within 1 year of receiving LVIVO-TaVec400 treatment.

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
Intervention / Treatment
Experimental: LVIVO-TaVec400 product
The dose escalation stage includes 4 dose level: DL1，DL2，DL3， DL4.
Biological: LVIVO-TaVec400 product
Each subject will be given a single-dose LVIVO-TaVec400 via intravenous infusion.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The incidence of Dose-limiting toxicity (DLT)
Time Frame: 28 days after LVIVO-TaVec400 infusion (Day 1)
DLTs are severe adverse events refers to any untoward medical occurred in a subject participated in a clinical investigation, which has a causal relationship with the treatment and will limit the dose escalation.
28 days after LVIVO-TaVec400 infusion (Day 1)
The incidence, severity of Adverse events (AEs)
Time Frame: Minimum 13 weeks after LVIVO-TaVec400 infusion (Day 1)
An adverse event refers to any untoward medical occurrence in a clinical investigation subject administered a pharmaceutical product (investigational or non-investigational), which does not necessarily have a causal relationship with the treatment.
Minimum 13 weeks after LVIVO-TaVec400 infusion (Day 1)
The incidence, severity of Treatment-related Adverse event (TRAE)
Time Frame: Maximum 15 years after LVIVO-TaVec400 infusion (Day 1)
An treatment-related adverse event refers to any untoward medical occurrence in a clinical investigation subject administered a pharmaceutical product (investigational or non-investigational), which has a causal relationship with the treatment.
Maximum 15 years after LVIVO-TaVec400 infusion (Day 1)
Maximum concentration (Cmax) in peripheral blood
Time Frame: Maximun 5 years after LVIVO-TaVec400 infusion (Day 1)
Maximum concentration (Cmax) in peripheral blood
Maximun 5 years after LVIVO-TaVec400 infusion (Day 1)
Time of maximum concentration (Tmax) in peripheral blood
Time Frame: Maximum 5 years after LVIVO-TaVec400 infusion (Day 1)
Time of maximum concentration (Tmax) in peripheral blood
Maximum 5 years after LVIVO-TaVec400 infusion (Day 1)
Area under the concentration-time curve (AUC) in peripheral blood
Time Frame: Maximum 5 years after LVIVO-TaVec400 infusion (Day 1)
Area under the concentration-time curve (AUC) in peripheral blood
Maximum 5 years after LVIVO-TaVec400 infusion (Day 1)
Recommended Dose regimen finding
Time Frame: Maximum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Determine the Recommended Dose regimen established through dose exploratory.
Maximum 104 weeks after LVIVO-TaVec400 infusion (Day 1)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) scores from baseline for r/r SLE subjects
Time Frame: Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
The SLEDAI-2K scale is a cumulative index used to assess disease activity across 24 different disease descriptors in patients with SLE. A total score ranges between 0 and 105, with a higher score representing a more significant degree of disease activity.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Change in IgG4-RD Response Index (IgG4-RD RI) from baseline for r/r IgG4-RD subjects
Time Frame: Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
The IgG4-RD scale is a cumulative index used to assess disease activity across 25 different disease descriptions in patients with IgG4-RD. A total score ranges between 0 and 75, with a higher score representing a more significant degree of disease activity.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Change in Expanded Disability Status Scale (EDSS) scores from baseline for PMS subjects.
Time Frame: Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
The EDSS is a scoring system used to quantify and monitor the progression of physical disability in patients with multiple sclerosis. The total score ranges from 0 to 10, with higher scores representing a worse outcome.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Change in Myasthenia Gravis Activities of Daily Living (MG-ADL) scores from baseline for r/r MG subjects.
Time Frame: Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
The MG-ADL is a patient-reported tool that quantifies the severity of myasthenia gravis symptoms based on daily functions. The total score ranges from 0 to 24, with higher scores representing a worse functional status.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Change in Quantitative Myasthenia Gravis (QMG) scores from baseline for r/r MG subjects.
Time Frame: Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
The QMG is a standard clinical tool used to quantify the severity of myasthenia gravis through objective muscle testing. The total score ranges from 0 to 39, with higher scores representing a worse clinical status.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)

Collaborators and Investigators

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

Sponsor

Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

Collaborators

Nanjing Legend Biotech Co.

Investigators

  • Principal Investigator: QiuBai Li, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

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)

April 20, 2026

Primary Completion (Estimated)

September 20, 2028

Study Completion (Estimated)

September 20, 2041

Study Registration Dates

First Submitted

April 24, 2026

First Submitted That Met QC Criteria

May 7, 2026

First Posted (Actual)

May 13, 2026

Study Record Updates

Last Update Posted (Actual)

May 13, 2026

Last Update Submitted That Met QC Criteria

May 7, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • LB2505-0002

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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