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PTOC1

Phase 1

Systemic Lupus Erythematosus | Monoclonal antibody | Immunology |Precision BioSciences, Inc.|Last Updated: Feb 11, 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
UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment18
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07403097Study of CD19 CAR-T Therapy for Refractory SLEPHASE1 RECRUITING 18Feb 1, 2026Dec 1, 2028Feb 11, 20261 China
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Study Endpoints
Primary Endpoints
The safety of PTOC1 cell therapy in patients with refractory SLE [Safety]
3 months

Types, frequency and severity of adverse events.

The changes in SLEDAI-2K from baseline [efficacy]
6 months

Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) ranges from 0 to 105 points. The higher the score, the higher the disease activity.

The changes in PGA from baseline [efficacy]
6 months

Physician Global Assessment(PGA) is a continuous visual analogue scale with 0, 1, 2, and 3 scores. "0" indicates no disease activity and "3" indicates the most severe disease activity.

The changes in BILAG-2004 from baseline [efficacy]
6 months

British Isles Lupus Assessment Group Index 2004(BILAG-2004) consists of 8 systems, each of which is graded as A, B, C and D. "A" indicates that the condition is highly active and requires active treatment. "B" indicates that the condition is active and requires close monitoring or symptomatic treatment. "C" indicates a stable condition. "D" indicates that the system is uninvolved.

The number of patients with SRI-4 response [efficacy]
3 months

The definition of SRI-4 response: SLEDAI-2K ≥ 4 points improvement; PGA \<0.3 points increase; BILAG 2004 with no new A grade score and no more than 1 new B grade score.

The number of patients with LLDAS [efficacy]
6 months

The definition of LLDAS: SLEDAI-2K ≤ 4 points and no disease activity in major organs (kidney, central nervous system, heart and lung), and no vasculitis or fever; no new disease activity symptoms compared with previous disease assessments; PGA ≤ 1; serological parameters not required; with the permitted use of low-dose glucocorticoids (prednisolone ≤ 7.5 mg/day), and/or stable immunosuppressives and biologics.

The number of patients with DORIS [efficacy]
6 months

The definition of DORIS: SLEDAI-2K = 0 points; PGA \< 0.5 points; serological parameters not required; with the permitted use of antimalarials, low-dose glucocorticoids (prednisolone ≤ 5 mg/day), and/or stable immunosuppressives and biologics.

Secondary Endpoints
Cmax of PTOC1 cells [PK parameter]
3 months
Tmax of PTOC1 cells [PK parameter]
3 months
AUC28d/90d of PTOC1 cells [PK parameter]
3 months
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
PTOC1EXPERIMENTALThis trial was designed as an open, single-arm, single-center, dose-exploration trial.
Interventions
NameTypeDescription
PTOC1BIOLOGICALThree dose groups (1.5×10\^5/kg, 5×10\^5/kg,1×10\^6/kg) were set up, starting from the low dose group climbing to explore the safe and effective dose.
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Eligibility Criteria
Age Range5 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Age ≥ 5 years, no gender limitation; * Diagnosed with SLE according to the 2019 EULAR/ACR classification criteria, and still in moderate to severe disease activity despite ≥ 3 months of high dose glucocorticoids(prednisone≥1mg/kg/d or other equivalent amount of other steroid),...

Countries:China
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT07403097studyFirstPostDate: changed