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A Phase 1 Study of FT819 in B-cell Mediated Autoimmune Disease

A Phase 1 Study of FT819 in B-cell Mediated Autoimmune Disease

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06308978
Enrollment
244
Registered
2024-03-13
Start date
2024-03-28
Completion date
2042-09-30
Last updated
2026-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Antineutrophilic Cytoplasmic Antibody (ANCA)- Associated Vasculitis (AAV), Idiopathic Inflammatory Myositis (IIM), Lupus Nephritis, Systemic Lupus Erythematosus (SLE), Systemic Sclerosis (SSc)

Keywords

FT819, Fate Therapeutics, Idiopathic inflammatory myositis (IIM), Systemic lupus erythematosus (SLE), Systemic sclerosis (SSc), Antineutrophilic cytoplasmic antibody (ANCA)-associated vasculitis (AAV), Allogeneic CAR-T, CD19-Targeted Therapy, Cell Therapy for Autoimmune Diseases, B-Cell Depletion in Autoimmune Disease, Phase 1 Clinical Trial, Allogeneic CAR cells, Autoimmune Diseases, A Phase 1 Study of FT819 in B-cell Mediated Autoimmune Diseases, Lupus Nephritis

Brief summary

This is a phase 1 study designed to evaluate the safety, pharmacokinetics (PK), and anti-B-cell activity of FT819 following treatment with or without auxiliary medicinal product (AMP) in participants with moderate-to-severe active systemic lupus erythematosus (SLE) with or without nephritis, antineutrophilic cytoplasmic antibody (ANCA)-associated vasculitis (AAV), idiopathic inflammatory myositis (IIM), and systemic sclerosis (SSc). The study will consist of a dose-escalation stage, followed by an expansion stage to further evaluate the safety and activity of FT819.

Interventions

DRUGFT819

FT819 will be administered as intravenous (IV) infusion at planned dose levels.

DRUGFludarabine

Fludarabine will be administered as an IV infusion at planned dose levels.

DRUGCyclophosphamide

Cyclophosphamide will be administered as an IV infusion at planned dose levels.

DRUGBendamustine

Bendamustine will be administered as an IV infusion at planned dose levels.

Sponsors

Fate Therapeutics
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
12 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * Age: 12 to 70 years old. * Diagnosis: Must have active B-cell mediated autoimmune disease (SLE, AAV, IIM, or SSc) confirmed by standard criteria. * Disease Severity: Moderate to severe, requiring at least two prior treatments that were ineffective. * Health Status: Adequate organ function to tolerate treatment. * Consent: Able to provide informed consent or assent/obtain parental consent and comply with study procedures. Key

Exclusion criteria

* Pregnancy/Breastfeeding: Women must not be pregnant or nursing. * Severe Organ Dysfunction: Significant heart, lung, liver, or kidney impairment. * Active Infections: No recent or ongoing serious infections. * Recent Cancer or Prior Cell Therapy: No active/recent malignancies, prior CAR T-cell therapy, or organ transplant. * Allergies: No known allergies to study treatments. * Weight Restriction: Must weigh at least 50 kg (110 lbs).

Design outcomes

Primary

MeasureTime frameDescription
Number of participants with treatment-emergent adverse events (TEAEs)Up to approximately 2 yearsThe number of participants with TEAEs will be reported.
Number of participants with serious TEAEsUp to approximately 2 yearsThe number of participants with serious TEAEs will be reported.
Number of participants with dose-limiting toxicities (DLTs)Up to approximately 29 daysThe number of participants with DLTs will be reported.

Secondary

MeasureTime frameDescription
Plasma concentration of FT819At designated time points up to approximately 29 daysThe plasma concentration of FT819 will be determined.
Impact of treatment on quality of lifeUp to approximately 2 yearsAssess changes in patient-reported health outcomes using the SF-36 survey.
Disease ActivityUp to approximately 2 yearsEvaluate improvements in disease-specific measures, such as: * SLE: Reduction in SLEDAI-2K score, rates of achieving DORIS, LLDAS * AAV: Proportion of patients achieving remission (BVAS v3) and relapse-free survival. * IIM: Proportion of patients achieving Myositis Response Criteria Total Improvement Score (MRC TIS major, moderate, minimal). * SSc: Changes in modified Rodnan Skin Score (mRSS) and lung function tests (FVC, DLCO).
Disease Activity in Participants with Lupus NephritisUp to approximately 2 yearsChange from baseline in urine protein to creatinine ratio (UPCR)

Countries

France, Sweden, United Kingdom, United States

Contacts

CONTACTFate Clinical Trials
clinicaltrials@fatetherapeutics.com858-875-1800

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 23, 2026