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Telitacicept

Phase 3

Generalized Myasthenia Gravis | Monoclonal antibody | Neurology |Vor Biopharma Inc.|Trials Updated: Oct 19, 2026

Telitacicept development status

Highest phase Phase 3
Registered trials 4 across 1 sponsor since Apr 2022

Telitacicept target and mechanism

Molecular targetBLyS/APRIL
ModalityMonoclonal antibody

Also known as RC18, RC18-L

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment441

FDA Designations

No designations recorded

Telitacicept clinical trials

Telitacicept · 2 trials · 2 indications

Phase 3 2
NCT07404865Phase 3 Study of Telitacicept in Active Primary Sjögren's DiseasePrimary Sjogren's Disease
RECRUITING250 Analytics
NCT06456580A Study of Telitacicept for the Treatment of Generalized Myasthenia Gravis (UPSTREAM MG)Generalized Myasthenia Gravis
ACTIVE NOT_RECRUITING191 Analytics
PHASE3RECRUITING
Phase 3 Study of Telitacicept in Active Primary Sjögren's Disease
Primary Sjogren's DiseaseUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
A Study of Telitacicept for the Treatment of Generalized Myasthenia Gravis (UPSTREAM MG)
Generalized Myasthenia GravisUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the efficacy of telitacicept versus placebo at Week 48 in the change from baseline in the EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) score at Week 48.
Week 48

Change from baseline in the EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) score at Week 48.

Change from baseline in Myasthenia Gravis-Activities of Daily Living (MG-ADL) score at Week 24
Week 24

The MG-ADL is an 8-item patient-reported outcome measure assessing MG symptoms and their effects on daily activities. Each item in the scale is scored on a 0 to 3 (0=normal, 3=severe disease) point scale. The total score is the sum of all individual item scores ranging from 0 to 24. Higher scores indicate more severe disability due to MG. A decrease from Baseline score indicates improvement.

Secondary Endpoints

To evaluate the efficacy of telitacicept versus placebo at Week 48 in the treatment of adult participants with pSD.
Week 48
To evaluate the efficacy of telitacicept versus placebo in improving glandular function during the trial.
Week 48
To evaluate the effect of telitacicept versus placebo in improving patient-reported outcomes (i.e., how participants feel and function) during the trial.
Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TelitaciceptEXPERIMENTALTelitacicept
PlaceboPLACEBO_COMPARATORPlacebo

Interventions

NameTypeDescription
TelitaciceptBIOLOGICALSubcutaneous injection
PlaceboDRUGSubcutaneous injection
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites49

Inclusion Criteria: 1. Male or female aged 18 to 75 years of age (both inclusive) at screening 2. Participants must meet the 2016 American College of Rheumatology (ACR)/EULAR classification criteria for primary Sjogren's Syndrome at the time of screening. 3. ESSDAI ≥5 at screening (score calculated...

Countries:United StatesGeorgiaArgentinaAustraliaBelgiumBrazilBulgariaCanadaChinaCzechiaFranceItalyJapanPolandSpain
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Recent Changes (Last 90 Days)

LOWOct 19, 2026NCT07404865lastUpdatePostDate: changed
LOWOct 19, 2026NCT07404865lastUpdatePostDate: changed
LOWOct 19, 2026NCT07404865lastUpdatePostDate: changed
MEDIUMOct 15, 2026NCT06456580Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMOct 15, 2026NCT06456580Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWAug 27, 2026NCT07404865lastUpdatePostDate: changed
LOWAug 27, 2026NCT07404865lastUpdatePostDate: changed
LOWAug 11, 2026NCT07404865lastUpdatePostDate: changed
LOWAug 11, 2026NCT07404865lastUpdatePostDate: changed
LOWAug 11, 2026NCT07404865lastUpdatePostDate: changed

Frequently asked questions about Telitacicept

What is telitacicept?

Telitacicept is an investigational monoclonal antibody being developed by Vor Biopharma Inc. for neurology indications. It is in Phase 3 clinical development for generalized myasthenia gravis and primary Sjogren's disease. Telitacicept has not been established as an approved therapy in these programs and remains under clinical study.

What is telitacicept used for in generalized myasthenia gravis?

Telitacicept is being studied as a treatment for generalized myasthenia gravis, a neuromuscular condition. The Phase 3 UPSTREAM MG study, NCT06456580, is evaluating telitacicept in adults with the disease across sites in the United States, Europe, Asia, South America and Australia. The trial is active but no longer recruiting new participants.

What does telitacicept target?

Telitacicept targets BLyS and APRIL, two signaling molecules involved in B cell survival and antibody production. By binding both ligands, telitacicept is designed to reduce B cell activity and autoantibody production. This dual BLyS/APRIL targeting is the basis for its study in autoimmune-driven neurological and rheumatologic conditions.

Who is developing telitacicept?

Telitacicept is being developed by Vor Biopharma Inc., which trades under the ticker VOR. The company is advancing the monoclonal antibody through Phase 3 clinical trials in generalized myasthenia gravis and primary Sjogren's disease.

What phase is telitacicept in?

Telitacicept is in Phase 3 clinical development. Two Phase 3 programs are underway: one in generalized myasthenia gravis and one in active primary Sjogren's disease. Telitacicept is investigational and is not an approved product for these indications.

What clinical trials is telitacicept in?

Telitacicept is being evaluated in two Phase 3 trials. NCT06456580, the UPSTREAM MG study, is an active, non-recruiting trial in generalized myasthenia gravis with 191 participants. NCT07404865 is a recruiting, placebo-controlled, double-blind Phase 3 study in active primary Sjogren's disease with 250 participants across the United States and Georgia.