Sub-Study: Analysis of JCV Antibody Index in MS Patients Treated With Teriflunomide - SWITCH-JCV

  • End date
    Dec 1, 2021
  • participants needed
  • sponsor
    Providence Health & Services
Updated on 24 January 2021
disease or disorder
natalizumab therapy


The purpose of this study is to determine if teriflunomide will be safe and effective to prevent relapses in patients with relapsing types of MS when switching from natalizumab to teriflunomide in patients at risk for PML. This is a two center interventional study of patients who have had 12 or more continuous infusions of natalizumab , who are anti-JCV-ab positive, and who had been free of clinical relapses during prior 12 months of natalizumab therapy who will be switching to teriflunomide.


Teriflunomide is the primary metabolite of leflunomide, which is marketed worldwide for the treatment of rheumatoid arthritis. Teriflunomide inhibits dihydroorotate dehydrogenase( DHODH), the forth enzyme in the de novo synthesis pathway of pyrimidines.Activated T-lymphocytes utilize both the de novo pyrimidine and salvage pathways of pyrimidines ribonucleotide synthesis.After mitogen stimulation, teriflunomide inhibits in vitro T cell proliferation, DNA and RNA synthesis and expression of cell surface and nuclear antigens that are directly involved in T-cell activation and proliferation.

Natalizumab (NTZ) is a FDA approved treatment for relapsing-forms of multiple sclerosis (MS) with pivotal studies showing an annualized relapse-rate (ARR) reduction of 68%, a reduction of new gadolinium (Gd+) lesions by 92% and a reduction of disability of 42% compared to placebo.NTZ is highly effective in controlling MS but the risk of developing progressive multifocal leukoencephalopathy (PML) increases with the duration of the use of natalizumab. It can have a serious and life threatening complication in about 1 in 500 to 1 in 250 patients who have had more that 18 infusions due PML and who have a detected antibody (Ab) for the JC virus. The risk of PML is much greater in patients who have had prior immunosuppressive (IS) treatment. The combination of detected anti-JCV Ab , duration of NTZ treatment of greater than 24 months and prior IS increases the risk of development PML to an incidence of 11 per 1000 treated patients. So there is a need to have an alternative MS disease modifying treatment (DMT) to use for patients at risk to develop PML from NTZ treatment that might be sufficiently effective for MS so as not to have the patients' MS worsen while lowering or eliminating the risk of PML.

Condition Multiple Sclerosis, Radiologically Isolated Syndrome, Dermatite Atopique modérée ou grave, multiple sclerosis (ms)
Treatment Teriflunomide
Clinical Study IdentifierNCT01970410
SponsorProvidence Health & Services
Last Modified on24 January 2021


How to participate?

Step 1 Connect with a site
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact


Phone Email

Please verify that you are not a bot.

Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note