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A Study to Investigate Long-term Safety and Tolerability of Frexalimab in Participants With Multiple Sclerosis

10 de novembro de 2026 atualizado por: Sanofi

A Phase 3 Extension Study to Investigate Long-term Safety and Tolerability of Frexalimab in Participants With Multiple Sclerosis.

Study LTS18002 is a global, multicenter, open-label (OL), Phase 3, long-term safety and efficacy extension study.

The purpose of this study is to provide continued access to frexalimab for participants with MS, and to evaluate the long-term safety and efficacy profile of frexalimab. This study will monitor delayed AEs, assess the durability of safety findings and characterize any emerging safety signals that may develop over an extended follow up period.

Study details include:

  • The study duration will be up to 4 years.

  • The OL treatment duration will be up to 96 weeks (corresponding to approximately 2 years) per participant.

  • There is an additional 24 weeks of safety follow up from the last dose of OL frexalimab for all participants (safety follow-up period/EOS: 4, 12 and 24 weeks after last investigational medicinal product(IMP) or OL frexalimab administration).

  • The number of visits over the 2-year duration will be dependent on subgroup assignment which is based on parent study from which the participant has entered the LTS18002 :

    1. ACT16877, EFC17504, EFC18098, and ASY22814 participants

      • Will have on-site visits every 12 weeks (9 visits)

        • Additionally, there will be 16 on-site visits for OL frexalimab administration (Week 4, 8, 16, 20, 28, 32, 40, 44, 52, 56, 64, 68, 76, 80, 88, and 92) for all participants EXCEPT those entering from EFC18098 (frexalimab open label administration is conducted at home via SC large volume (OBDS VT) device)

          • There will be 3 follow up visits beginning 4 weeks after the last administration of OL frexalimab

            • Home administration is allowed for participants from ACT16877, based on Investigator judgement, participant/caregiver training and local availability. Home nurse services are mandatory for at-home administration.

              • Home nurse services for at home administration may be considered for EFC17504 participants after Week 24 administration of OL frexalimab, based on availability. Participants that have initiated OL frexalimab via home administration during the parent study may continue to receive it in this manner.

                • NOTE: For participants from EFC17504, all on-site visits including monthly IMP administrations will include safety labs (biochemistry, hematology liver chemistry, and immunoglobulins) and physical exams

    2. EFC17919A/B participants

      • Will have on site visits every 12 weeks (9 visits)

        • Will have a total of 16 visits for OL frexalimab administration (Week 4, 8, 16, 20, 28, 32, 40, 44, 52, 56, 64, 68, 76, 80, 88, and 92)

          • Additionally, there will be up to 3 visits for administration of DB treatment (until results become available and randomization assignment availability).

            • Home nurse services for at home administration may be considered for EFC17919A/B participants after Week 24 administration of OL frexalimab, based on availability.

NOTE: all on-site visits including monthly IMP administrations will include safety labs (biochemistry, hematology liver chemistry, and immunoglobulins) and physical exams.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Tipo de estudo

Intervencional

Inscrição (Estimado)

2500

Estágio

  • Fase 3

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

  • Nome: Trial Transparency email recommended (Toll free for US & Canada)
  • Número de telefone: option 6 800-633-1610
  • E-mail: Contact-US@sanofi.com

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

18 anos a 60 anos (Adulto)

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria:

- Participants with relapsing multiple sclerosis(RMS) or non-relapsing secondary progressive multiple sclerosis(nrSPMS) who completed, on IMP, the Phase 2 ACT16877 study, or one of the four Phase 3 frexalimab studies in MS indication (EFC17919A and EFC17919B, EFC17504, EFC18098), or planned Phase 2 biomarker ASY22814.

Exclusion Criteria:

  • If IMP discontinuation criteria are met as per guidance
  • The participant is at risk for or has a persistent chronic, active (including fever ≥38°C and clinically unstable), recurring systemic infection or opportunistic infections (eg, PML See Appendix in protocol) as judged by the Investigator.
  • Notably low immunoglobulin G(IgG) levels, defined as a level that is 20% below the LLN, and/or notably low IgM level, defined as a level 10% below the LLN.
  • Participants who developed clinically relevant cardiovascular, hepatic, endocrine, neuropsychiatric or other major systemic disease making implementation of the protocol or interpretation of the study results difficult or that would put the participant at risk by participating in the extension study, as judged by the Investigator.
  • Clinical evidence, suspicion or significant risk for thromboembolic events, as well as myocardial infarction, stroke, and/or antiphospholipid syndrome and any participants requiring antithrombotic treatment.
  • Continued need for/chronic use of a prohibited concomitant medication.
  • Suicidal risk as per C-SSRS: if a participant scores "yes" on items 4 or 5 of the Suicidal Ideation Section, or "yes" on any item of the Suicidal Behavior Section.

The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Não randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Frexalimab SC (OL)

Participants will be administered frexalimab subcutaneous
Medicamento: Frexalimab

Pharmaceutical form:Solution for injection-Route of administration:SC

Outros nomes:
  • SAR441344
Medicamento: Frexalimab

Pharmaceutical form:Solution for infusion-Route of administration:IV

Outros nomes:
  • SAR441344
Medicamento: MRI contrast-enhancing agents

Route of administration:IV
Experimental: Frexalimab IV (OL)

Participants will be administered frexalimab intravenously
Medicamento: Frexalimab

Pharmaceutical form:Solution for injection-Route of administration:SC

Outros nomes:
  • SAR441344
Medicamento: Frexalimab

Pharmaceutical form:Solution for infusion-Route of administration:IV

Outros nomes:
  • SAR441344
Medicamento: MRI contrast-enhancing agents

Route of administration:IV
Experimental: Frexalimab (DB)

For EFC17919A/B parent study participants: at Opt-in visit participants will continue to be administered f rexalimab through unblinding visit. Participants will receive placebo tablet once daily until the unblinding visit.
Medicamento: Frexalimab

Pharmaceutical form:Solution for injection-Route of administration:SC

Outros nomes:
  • SAR441344
Medicamento: Frexalimab

Pharmaceutical form:Solution for infusion-Route of administration:IV

Outros nomes:
  • SAR441344
Medicamento: MRI contrast-enhancing agents

Route of administration:IV

Medicamento: Teriflunomide Placebo

Pharmaceutical form:Tablet-Route of administration:Oral

Medicamento: Cholestyramine

Route of administration:oral

Medicamento: charcoal

Route of administration:oral
Comparador Ativo: Teriflunomide (DB)

For EFC17919A/B parent study participants: at Opt-in visit participants will continue to receive teriflunomide tablet. The placebo will be administered to participants at the same infusion rate and duration as for frexalimab from the opt-in visit until availability of results and unblinding.
Medicamento: MRI contrast-enhancing agents

Route of administration:IV

Medicamento: Cholestyramine

Route of administration:oral

Medicamento: charcoal

Route of administration:oral

Medicamento: Frexalimab Placebo

Pharmaceutical form:Solution for infusion-Route of administration:IV

Medicamento: Teriflunomide

Pharmaceutical form:Tablet-Route of administration:Oral

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Number of participants with Adverse Events(AEs)
Prazo: up to to approximately 2.5 years since last participant in

Number of participants with Adverse Events(AEs), serious adverse event(SAEs), AEs leading to permanent study intervention discontinuation, adverse event of special interest(AESIs), local tolerability, clinically significant abnormalities in laboratory tests, Columbia-Suicide Severity Rating Scale(C-SSRS)
up to to approximately 2.5 years since last participant in

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Participants from EFC17919A, EFC17919B, and EFC17504 studies only: time to onset of 6-month composite confirmed disability worsening(cCDW) for RMS or composite confirmed disability progression(cCDP) for nrSPMS
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
Time to onset of individual components of the composite, confirmed over 3 months or 6 months EDSS for all prior study participants 9-HPT, T25FW test (participants rolling over from EFC17504, EFC17919A, and EFC17919B)
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
Progression independent of relapse activity defined as the time to onset of 6-month cCDW
Prazo: up to to approximately 2.5 years since last participant in

Progression independent of relapse activity defined as the time to onset of 6-month cCDW, defined by either no prior relapse or an onset more than 90 days after the start date of the last Investigator reported relapse (participants rolling over from EFC17919A and EFC17919B)
up to to approximately 2.5 years since last participant in
Number of new and/or enlarging T2-hyperintense lesions per year as detected by MRI
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
Total number of new GdE T1 lesions per year as detected by MRI
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
Change from baseline at scheduled visits in total volume of T2-hyperintense lesions as detected by brain MRI
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
ARR assessed by confirmed protocol defined relapses
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
antidrug antibodys(ADAs) incidence
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in
Change from baseline in serum immunoglobulin(Ig) levels
Prazo: up to to approximately 2.5 years since last participant in
up to to approximately 2.5 years since last participant in

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Sanofi

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

15 de fevereiro de 2027

Conclusão Primária (Estimado)

16 de maio de 2031

Conclusão do estudo (Estimado)

16 de maio de 2031

Datas de inscrição no estudo

Enviado pela primeira vez

3 de novembro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

10 de novembro de 2026

Primeira postagem (Real)

12 de novembro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

12 de novembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

10 de novembro de 2026

Última verificação

1 de novembro de 2026

Mais Informações

Termos relacionados a este estudo

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • LTS18002
  • 2026-525688-41 (Identificador de registro: CTIS)

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

SIM

Descrição do plano IPD

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Sim

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

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