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An open-label, multi-center, phase 1/2 study to assess safety, efficacy, and cellular kinetics of YTB323 in participants with Relapsing Multiple Sclerosis with breakthrough disease activity during previous treatment with a highly efficacious therapy

Status
Recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-512714-18-00
Acronym
CYTB323N12101
Enrollment
15
Registered
2025-03-21
Start date
2025-11-11
Completion date
Unknown
Last updated
2026-01-19

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

Conditions

Relapsing Multiple Sclerosis

Brief summary

Change in safety parameters including, but not limited to severity and frequency dose limiting toxicities (DLTs) of Adverse Events (AEs) and findings in vital signs, laboratory, ECG, neurological status, and safety MRIs of the brain and spinal cord

Detailed description

Clinical measures for relapses and disability (includes EDSS, XX, T25FW, 9HPT, SDMT, XX) and MRI changes in disease activity (including new and enlarging T2 lesions and Gd-enhancing T1 lesions), YTB323 transgene expression levels by qPCR over time in blood; cellular kinetics parameters (Cmax, AUC, Tmax, Clast, Tlast), Safety data from each dose level, Pre-existing and treatment-induced immunogenicity (humoral, anti-YTB323 antibody; and cellular, presence of CAR19 specific CD4 and CD8 T cells measuring interferon gamma production)

Interventions

DRUGTOCILIZUMAB
DRUGFLUDARABINE PHOSPHATE
DRUGYTB323
DRUGCYCLOPHOSPHAMIDE

Sponsors

Novartis Pharma AG
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to 64 Years

Design outcomes

Primary

MeasureTime frame
Change in safety parameters including, but not limited to severity and frequency dose limiting toxicities (DLTs) of Adverse Events (AEs) and findings in vital signs, laboratory, ECG, neurological status, and safety MRIs of the brain and spinal cord

Secondary

MeasureTime frame
Clinical measures for relapses and disability (includes EDSS, XX, T25FW, 9HPT, SDMT, XX) and MRI changes in disease activity (including new and enlarging T2 lesions and Gd-enhancing T1 lesions), YTB323 transgene expression levels by qPCR over time in blood; cellular kinetics parameters (Cmax, AUC, Tmax, Clast, Tlast), Safety data from each dose level, Pre-existing and treatment-induced immunogenicity (humoral, anti-YTB323 antibody; and cellular, presence of CAR19 specific CD4 and CD8 T cells measuring interferon gamma production)

Countries

France, Germany, Italy, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026