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LVIVO-TaVec400 product

Phase 1

Relapsed/Refractory Systemic Lupus Erythematosus (r/r SLE) | Monoclonal antibody | Immunology |Legend Biotech Corporation|Last Updated: May 13, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLED
Total Trials1
Total Enrollment44
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07583030A Clinical Study to Evaluate LVIVO-TaVec400 for the Treatment of Relapsed/Refractory Autoimmune DiseasesEARLY_PHASE1 NOT YET_RECRUITING 44Apr 20, 2026Sep 20, 2041May 13, 20265 China
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Study Endpoints
Primary Endpoints
The incidence of Dose-limiting toxicity (DLT)
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.

The incidence, severity of Adverse events (AEs)
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.

The incidence, severity of Treatment-related Adverse event (TRAE)
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 concentration (Cmax) in peripheral blood
Maximun 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
Maximum 5 years after LVIVO-TaVec400 infusion (Day 1)
Recommended Dose regimen finding
Maximum 104 weeks after LVIVO-TaVec400 infusion (Day 1)

Determine the Recommended Dose regimen established through dose exploratory.

Secondary Endpoints
Change in Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) scores from baseline for r/r SLE subjects
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
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
Change in Expanded Disability Status Scale (EDSS) scores from baseline for PMS subjects.
Minimum 104 weeks after LVIVO-TaVec400 infusion (Day 1)
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
LVIVO-TaVec400 productEXPERIMENTALThe dose escalation stage includes 4 dose level: DL1,DL2,DL3, DL4.
Interventions
NameTypeDescription
LVIVO-TaVec400 productBIOLOGICALEach subject will be given a single-dose LVIVO-TaVec400 via intravenous infusion.
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersNo
Study Sites5

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 Rheumat...

Countries:China
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT07583030studyFirstPostDate: changed
LOWMay 21, 2026NCT07583030NEW_TRIAL: changed
LOWMay 21, 2026NCT07583030NEW_TRIAL: changed