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FT819

Phase 2

Lupus Nephritis | Monoclonal antibody | Immunology |Fate Therapeutics, Inc.|Last Updated: Sep 2, 2026

Target and mechanism

Molecular targetCD19
Target classAntigen
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment53

FDA Designations

RMAT

Clinical trial landscape

FT819 · 3 trials · 12 indications

Phase 2 1Phase 1 2
NCT07570862A Phase 2, Open-Label, Single-Arm Trial of FT819 in Participants With Lupus NephritisLupus Nephritis
RECRUITING53 Analytics
PHASE2RECRUITING
A Phase 2, Open-Label, Single-Arm Trial of FT819 in Participants With Lupus Nephritis
Lupus NephritisUnlock trial analytics

Study Endpoints

Primary Endpoints

Complete Renal Response (CRR) at Week 26
Week 26

Proportion of participants achieving CRR at Week 26, with CRR defined as the achievement of all of the following criteria: * UPCR \<0.5 g/g * Estimated glomerular filtration rate (eGFR) ≥85% of baseline or ≥60 mL/min/1.73 m2 * No use of rescue therapy

Number of participants with treatment-emergent adverse events (TEAEs)
Up to approximately 2 years

The number of participants with TEAEs will be reported.

Number of participants with serious TEAEs
Up to approximately 2 years

The number of participants with serious TEAEs will be reported.

Number of participants with dose-limiting toxicities (DLTs)
Up to approximately 29 days

The number of participants with DLTs will be reported.

Incidence and nature of dose-limiting toxicities within each dose level cohort
Up to Day 29
Incidence, nature, and severity of adverse events (AEs) of FT819 as monotherapy and in combination with IL-2 in r/r B-cell lymphoma, r/r chronic lymphocytic leukemia, and r/r precursor B-cell acute lymphoblastic leukemia
Up to 15 years

Secondary Endpoints

CRR at Week 52
Week 52
CRR at Week 104
Week 104
Overall Renal Response
Up to approximately 2 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
FT819EXPERIMENTALFT819, allogeneic T cells derived from a clonal, TCR knockout iPSC line that express CD19-targeted CAR regulated by the TRAC locus, given as a single IV infusion
Regimen A (Single dose with AMP)EXPERIMENTAL -
Regimen B (Single-dose without AMP, with background therapy)EXPERIMENTAL -
Regimen C (Two-dose with AMP)EXPERIMENTAL -
Regimen D (Two-dose without AMP, with background therapy)EXPERIMENTAL -
Regimen B1 (Single-dose without AMP, background therapy temporarily suspended)EXPERIMENTAL -
FT819 Single-Dose Monotherapy, B-Cell LymphomaEXPERIMENTALFT819 single-dose monotherapy in adult subjects with r/r B-cell Lymphoma
FT819 Single-Dose in Combination with IL-2, B-Cell LymphomaEXPERIMENTALFT819 single-dose in combination with IL-2 in adult subjects with r/r B-cell Lymphoma
FT819 Step Fractionated Monotherapy, B-Cell LymphomaEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in adult subjects with r/r B-cell Lymphoma
FT819 Single-Dose Monotherapy, CLLEXPERIMENTALFT819 single-dose monotherapy in adult subjects with r/r CLL
FT819 Single-Dose in Combination with IL-2, CLLEXPERIMENTALFT819 single-dose in combination with IL-2 in adult subjects with r/r CLL
FT819 Step Fractionated Monotherapy, CLLEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in adult subjects with r/r CLL
FT819 Single-Dose Monotherapy, B-ALLEXPERIMENTALFT819 single-dose monotherapy in adult subjects with r/r B-ALL
FT819 Single-Dose in Combination with IL-2, B-ALLEXPERIMENTALFT819 single-dose in combination with IL-2 in adult subjects with r/r B-ALL
FT819 Step Fractionated Monotherapy, B-ALLEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in adult subjects with r/r B-ALL
FT819 Step Fractionated Monotherapy in Combination with IL-2, B-Cell LymphomaEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in combination with IL-2 in adult subjects with r/r B-cell Lymphoma
FT819 Step Fractionated Monotherapy in Combination with IL-2, CLLEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in combination with IL-2 in adult subjects with r/r CLL
FT819 Step Fractionated Monotherapy in Combination with IL-2, B-ALLEXPERIMENTALFT819 monotherapy administered as step-fractionated dosing in combination with IL-2 in adult subjects with r/r B-ALL

Interventions

NameTypeDescription
FT819BIOLOGICALSingle Intravenous (IV) infusion of FT819 administered on Day 1
FludarabineDRUGFludarabine will be administered as an IV infusion at planned dose levels.
CyclophosphamideDRUGCyclophosphamide will be administered as an IV infusion at planned dose levels.
BendamustineDRUGBendamustine will be administered as an IV infusion at planned dose levels.
IL-2DRUGBiologic response modifier
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Eligibility Criteria

Age Range12 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites9

INCLUSION CRITERIA: * Age ≥12 to ≤70 years * Diagnosis of SLE per EULAR/ACR 2019 classification criteria * Biopsy-proven proliferative Class III or IV LN, with or without concomitant Class V involvement, based on the 2003/2018 ISN/RPS classification * Positivity for at least one of the following au...

Countries:United StatesFranceSwedenUnited Kingdom
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Recent Changes (Last 90 Days)

LOWSep 2, 2026NCT07570862lastUpdatePostDate: changed
LOWSep 2, 2026NCT07570862lastUpdatePostDate: changed
LOWSep 2, 2026NCT07570862lastUpdatePostDate: changed
LOWSep 1, 2026NCT07570862lastUpdatePostDate: changed
LOWSep 1, 2026NCT07570862lastUpdatePostDate: changed
LOWAug 17, 2026NCT07570862Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 17, 2026NCT07570862Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about FT819

What is FT819 used for?

FT819 is an investigational cell therapy being studied for B-cell mediated diseases, including lupus nephritis, B-cell lymphoma, and ANCA-associated vasculitis. It is in Phase 1 and Phase 2 clinical trials for these conditions.

What does FT819 target?

FT819 targets CD19, an antigen expressed on B cells. By targeting CD19, FT819 is designed to deplete B cells involved in the pathogenesis of autoimmune diseases and B-cell malignancies.

Who makes FT819?

FT819 is being developed by Fate Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol FATE.

What phase is FT819 in?

FT819 is in Phase 1 clinical development for B-cell malignancies and autoimmune diseases, and in Phase 2 for lupus nephritis. It is investigational and not yet approved by the FDA.

What clinical trials is FT819 in?

FT819 is being studied in three trials: NCT04629729 (Phase 1, B-cell malignancies), NCT06308978 (Phase 1, autoimmune diseases including AAV and lupus nephritis), and NCT07570862 (Phase 2, lupus nephritis).

Is FT819 the same as any other drug?

FT819 is a distinct investigational product developed by Fate Therapeutics. It is not known to be marketed under any other name.