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NCT Number: NCT07325292

Non-inferiority Study of Frexalimab Subcutaneous Administration Compared to Intravenous Administration in Adult Participants With Multiple Sclerosis

This is a randomized, open-label, parallel, Phase 3 study with 2-arms for treatment.

The purpose of this study is to evaluate SC administration of frexalimab every 4 weeks (q4w) compared to IV administration of frexalimab q4w in male and female participants with RMS and nrSPMS (aged 18 to 60 years at the time of enrollment). People diagnosed with MS are eligible for enrollment as long as they meet all the inclusion criteria and none of the exclusion criteria.

Study details include:

The study intervention duration will be 48 weeks (12 months) for Parts A and B combined. Optional Part C will last until the initiation of a long term safety study for Frexalimab.The follow up duration after the end of study intervention (in case of discontinuation) will be 6 months.

The number of scheduled visits (Parts A and B) will be 17 or 11 for participants receiving frexalimab SC or IV, respectively, with an on-site visit frequency of every month between Week 4 and Week 24 in Part A, then every 1 to 3 months in Part B, then every 6 months in Part C. Participants discontinuing treatment before the End of Study will have an additional 3 follow-up visits.

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Key information

Conditions

Multiple Sclerosis Autoimmune Diseases Autoimmune Diseases of the Nervous System Demyelinating Autoimmune Diseases, CNS Demyelinating Diseases Immune System Diseases Nervous System Diseases

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Investigational Site Number : 0560001, Bruges, Belgium

Loading trial locations.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

The participant must qualify for inclusion per either Group A or B criteria as detailed below, meeting all the inclusion criteria of the applicable group:

Group A (RMS)

  • The participant must be 18 to 55 years of age, inclusive, at the time of signing the informed consent.
  • The participant must have been diagnosed with RMS in accordance with the 2017 revised McDonald criteria.
  • The participant must have an Expanded Disability Status Scale (EDSS) score of ≤5.5 at the first visit (Screening Visit).
  • The participant must have at least 1 of the following prior to screening:
  • 1 documented relapse within the previous year OR
  • 2 documented relapses within the previous 2 years, OR
  • 1 documented Gd enhancing lesion on an MRI scan within the previous year. Group B (nrSPMS)
  • Participant must have a previous diagnosis of RRMS in accordance with the 2017 revised McDonald criteria
  • The participant must be 18 to 60 years of age, inclusive, at the time of signing the informed consent.
  • The participant must have a current diagnosis of SPMS in accordance with the clinical course criteria revised in 2013.
  • The participant must have documented evidence of disability progression observed during the 12 months before screening.
  • The participant must have an absence of clinical relapses for at least 24 months.
  • The participant must have an EDSS score between 3.0 and 6.5 points, inclusive, at the first visit (Screening Visit).

Participants from Group A and Group B are eligible to be included in the study only if all of the following criteria also apply:

  • Contraceptive use by men and women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.

Exclusion criteria

  • The participant has been diagnosed with primary progressive MS according to the 2017 revision of the McDonald diagnostic criteria.
  • The participant has a history of infection or may be at risk for infection:
  • Fever within 28 days of the Screening Visit
  • Presence of psychiatric disturbance or substance abuse
  • History, 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.
  • Current hypogammaglobulinemia defined by Ig levels (IgG and/or IgM) below the LLN at screening or a history of primary hypogammaglobulinemia.
  • A history or presence of disease that can mimic MS symptoms.
  • The participant has a contraindication for MRI.

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

Treatment and study plan

Frexalimab

Drug

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

Other names: SAR441344

MRI contrast-enhancing preparations

Drug

Route of administration:IV injection

Primary outcomes

  1. Area under the curve over the interval W20 to W24(part A)

    Time frame: Until Week 24

    AUCW20-W24

  2. Trough concentration at steady state(part A)

    Time frame: Until Week 24

    Ctrough,SS

Secondary outcomes

  1. Frexalimab plasma concentrations over time(part A)

    Time frame: Until Week 24

  2. Pharmacokinetic parameters: Cmax(part A)

    Time frame: Until Week 24

  3. Pharmacokinetic parameters: Tmax(part A)

    Time frame: Until Week 24

  4. Number of participants with adverse events, SAEs, AEs leading to permanent study intervention discontinuation, AESIs, and potentially clinically significant abnormality(PCSA) in laboratory tests, and vital signs during the study period

    Time frame: Until Week 96

  5. Incidence of ADAs over time(part A)

    Time frame: Until Week 96

  6. Total number of Gd-enhancing T1 lesions at W12 and W24(part A)

    Time frame: At Week 12 and Week 24

  7. Time to onset of confirmed disability worsening (CDW)/ confirmed disability progression(CDP) confirmed over 3 months

    Time frame: Until week 96

  8. Medical device AEs, ADEs, SAEs, SADEs and device deficiencies throughout the study

    Time frame: Until week 96

  9. Percentage of participants that prefer SC administration over IV administration assessed by Items 13 and 14 of the PESQ at Week 48 completed by participants that switched from IV to SC in Part B.

    Time frame: From week 24 to week 48

  10. Total number of GdE T1 lesions at W48(part B)

    Time frame: At week 48

  11. Total number of GdE T1 lesions at W96 and yearly thereafter.(part C)

    Time frame: At week 96 and yearly thereafter

Study contacts

Contact information is provided by the study sponsor or research team.

Trial Transparency email recommended (Toll free for US & Canada)

CONTACT

[email protected]

800-633-1610 ext. option 6

Sponsors and collaborators

Lead sponsor

Sanofi

Industry

Registry information

Official study title

A Randomized, Phase 3, Open-label Study to Investigate Pharmacokinetics, Safety, and Efficacy of Subcutaneous Compared to Intravenous Frexalimab in Adult Participants With Multiple Sclerosis

Acronym: Frexcite

Important dates

Study start
2026
Primary completion
2027
Study completion
2028
First posted
Jan 8, 2026
Registry last updated
Jun 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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