Clinical trial Recruiting at 5 sites Phase 2 Interventional Ages 18 to 55 Men only

Testosterone treatment for neuroprotection and myelin repair in relapsing remitting multiple sclerosis

Official title: TOTEM RRMS : TestOsterone TreatmEnt on Neuroprotection and Myelin Repair in Relapsing Remitting Multiple Sclerosis

Run by University Hospital, Strasbourg, France · NCT03910738 · Data updated 2026-11-12

This study is testing if testosterone treatment can help protect nerves and repair myelin in men with relapsing-remitting multiple sclerosis who have low testosterone levels.

More Multiple Sclerosis, Relapsing-Remitting trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 55 Years
SexMen only
Enrollment40 (estimated)
SponsorUniversity Hospital, Strasbourg, France
Academic / other
Drugs / interventionsnatalizumab, ocrelizumab, ofatumumab
Locations5 sites (Besançon and 4 other locations)
StatusRecruiting
StartedOctober 29, 2019
Main results expectedDecember 2027
Study endsDecember 2027
Registry record updatedJune 29, 2025
Trial IDNCT03910738 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are men aged 18 to 55 with a confirmed diagnosis of relapsing-remitting multiple sclerosis who have been on specific disease-modifying therapies for at least one year.

Probably not a fit

Patients who are not men, those outside the age range of 18 to 55, or those without a confirmed diagnosis of relapsing-remitting multiple sclerosis may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the effects of testosterone undecanoate on neuroprotection and myelin repair in patients with relapsing-remitting multiple sclerosis (RRMS). It is a multicenter, randomized, double-blind, placebo-controlled phase 2 trial aimed at assessing the potential benefits of testosterone supplementation in testosterone-deficient men aged 18 to 55 who have been on disease-modifying therapies. The study will evaluate cognitive impact, quality of life, fatigue, anxiety/depression, and disability through various assessments, including MRI. The goal is to explore innovative therapies that promote neuroregeneration and myelin repair, addressing a critical need in MS treatment.

Why it matters

Potential benefit: If successful, this treatment could enhance neuroprotection and promote myelin repair in patients with relapsing-remitting multiple sclerosis.

How similar studies have gone: While there have been few exploratory trials on testosterone in this context, this approach is relatively novel and has not been extensively tested in a similar structured manner.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Man between 18 and 55 years
* Patient affiliated to a social health insurance plan
* Patient able to understand the objectives and risks related to the research and able to comply with the requirements of the protocol throughout the duration of the study
* Patient having been informed of the results of the prior medical examination
* Patient having signed an informed consent
* Confirmed and documented diagnosis of MS, as defined by the revised McDonald criteria,
* Patient who have been receiving one of the following disease modifying therapies for at least one year prior to randomization: natalizumab , fingolimod, ponesimod, ocrelizumab, or ofatumumab, in accordance with their prescribing information. Switching from one molecule to another during the previous year is also permitted, provided that the switch was motivated by a non-neurological reason (relapse, MRI activity). Patients receiving ocrelizumab within 6 to 9 months are eligible, provided they have received full-dose ocrelizumab for at least 2 years.
* Biological hypogonadism defined by serum total testosterone levels below 20 nmol / L (checked by blood sampling during the screening visit)
* For patients under natalizumab : Negative status for JC virus or JC virus synthesis index ≤ 1.5 (checked by blood sampling at the inclusion visit)
* No relapses in the year prior to inclusion
* Disability status during the selection visit with an EDSS score of 0 to 7 (verified by questionnaire during the inclusion visit)
* Stable neurological state in the month preceding randomization

Exclusion Criteria:

* Patients with progressive MS (primary or secondary)
* Patients with hypogonadism with clinical symptoms and treated with androgens
* Patients with PSA (prostate specific antigen)\> 2.5 ng / ml (for an age less than 49 years old) or \> 3.5 ng / ml (for age ≥ 50 years) (checked by a blood test at the inclusion visit)
* Patients with a hematocrit level \> 54% (checked by blood sampling during the inclusion visit)
* Patients refusing or unable to undergo an MRI
* Patients with any other disease other than MS that may contribute to neurological symptoms and signs or affect their evaluation
* Patients with neurological signs compatible with progressive multifocal leukoencephalopathy (PML) or confirmed leukoencephalopathy
* Patients diagnosed with untreated sleep apnea
* Patients with or having had cancer or tumors of the liver, heart, kidney, prostate or mammary gland
* Patients with cardiovascular, renal, hepatic, hematological, gastrointestinal, pulmonary, uncontrolled diseases
* Patients wishing to procreate during the study period
* Patients with chronic infectious disease
* Patients with organic or psychiatric disease compromise their ability to understand the information given and to follow the protocol
* Patients with a history of hypersensitivity to treatment or any of the excipients, or drugs of similar chemical classes
* Patients who used experimental drugs and / or who participated in clinical drug trials in the 6 months prior to selection
* Patient in exclusion period (determined by previous study or in progress)
* Impossibility of giving information to the patient (subject in emergency situation, difficulties in understanding the subject or other)
* Incapacitated subject (subject to a legal protection measure: safeguard of justice, curatorship, guardianship, future protection mandate, family habilitation)

Where it's running

  • CHU de Besançon
    Besançon, France
    Recruiting
  • CHU Nancy
    Nancy, France
    Recruiting
  • Hôpital Pitié-Salpêtrière
    Paris, France
    Recruiting
  • CHU de Rennes/Pontchaillou
    Rennes, France
    Recruiting
  • CHRU de Strasbourg
    Strasbourg, France
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.