Tysabri Observational Cohort Study - Multiple Sclerosis (MS) Registries

Progressive Multifocal Leukoencephalopathy Clinical Trial

Official title:

An Observational Study Utilising Data From the US Tysabri TOUCH Programme and Select EU MS Registries to Estimate the Risk of Progressive Multifocal Leukoencephalopathy (PML) and Other Serious Opportunistic Infections Among Patients Who Were Exposed to an MS Disease Modifying Treatment Prior to Treatment With Tysabri

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03399981
• Other study ID #: 101MS411
• Secondary ID: EUPAS19800
• Status: Completed
• Start date: June 1, 2017
• Est. completion date: December 31, 2023

Study information

• Verified date: March 2024
• Source: Biogen
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

The primary purpose of this study is to estimate the incidence of progressive multifocal leukoencephalopathy (PML) among patients who switched to Tysabri from disease modifying therapies (DMTs), including newer DMTs (including fingolimod, dimethyl fumarate and teriflunomide) and the established DMTs (interferon beta and glatiramer acetate). Researchers will also look to estimate the incidence of other serious opportunistic infections among patients who switch to Tysabri from newer DMTs (including fingolimod, dimethyl fumarate and teriflunomide) and the established DMTs (interferon beta and glatiramer acetate)

Description:

This is an observational cohort study utilising all available data from the Tysabri TOUCH (TYSABRI Outreach: Unified Commitment to Health) prescribing programme (US) supplemented with data from European Union (EU) multiple sclerosis (MS) registries to estimate the risk of PML and other serious opportunistic infections (OIs) among patients on Tysabri who have switched from newer DMTs (including fingolimod, dimethyl fumarate and teriflunomide) and the established DMTs (interferon beta and glatiramer acetate). This study will provide cumulative data from its two components: a retrospective component (data captured prior to 01 January 2016) and a prospective component (data captured, and patients followed up, from 01 January 2016 through 31 December 2023; total prospective study duration of 8 years). All patients who switched to Tysabri from another DMT through 31 December 2020 will be included. The study will continue to follow-up patients until 31 December 2023 to allow for a minimal follow-up of 3 years.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 80327
• Est. completion date: December 31, 2023
• Est. primary completion date: December 31, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: N/A and older

Eligibility

Key Inclusion Criteria:

• All TOUCH and available EU MS registry participants who have switched from DMTs (including fingolimod, dimethyl fumarate, teriflunomide, interferon beta and glatiramer acetate) and have one or more infusion(s) of Tysabri.

Key Exclusion Criteria:

• Not applicable NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.

Related Conditions & MeSH terms

• Leukoencephalopathies
• Leukoencephalopathy, Progressive Multifocal
• Progressive Multifocal Leukoencephalopathy

Intervention

Biological:
• Tysabri
Administered as specified in the treatment arm.

Locations

Country	Name	City	State
United States	Research Site	Cambridge	Massachusetts

Sponsors (1)

Lead Sponsor	Collaborator
Biogen

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Prospective and Retrospective Analyses: Number of Participants with Confirmed Progressive Multifocal Leukoencephalopathy (PML)	Confirmed cases of PML must have one of the following: • Brain biopsy or brain from post mortem examination showing evidence of viral cytopathic changes on hematoxylin and eosin (H & E) staining associated with either positive immunohistochemistry for SV40 or in-situ hybridization for John Cunningham Virus (JCV) deoxyribonucleic acid (DNA) OR; All of the following criteria: • Cerebrospinal fluid (CSF) with evidence of JCV DNA, preferably by ultra-sensitive quantitative polymerase chain reaction (PCR) testing (limit of quantification of = 50 copies/ml), or JCV DNA on brain biopsy by PCR AND detailed description of brain magnetic resonance imaging (MRI) findings that are consistent with PML AND PREFERABLY new or progressive clinical symptoms suggestive of PML	Retrospective: from the time of switching to Tysabri to 31 December 2015; Prospective: from the time of switching to Tysabri (on or after 01 January 2016) to 31 December 2023 (up to 8 years)
Primary	Prospective and Retrospective Analyses: Number of Participants with Serious Adverse Events of Other Serious Opportunistic Infections (OIs)	An SAE is any untoward medical occurrence at any dose that results in death, immediate risk of death, hospitalization, disability, or congenital anomaly/birth defect.; Opportunistic infections (OIs) are infections that occur more frequently and are more severe in individuals with weakened immune systems.	Retrospective: from the time of switching to Tysabri to 31 December 2015; Prospective: from the time of switching to Tysabri (on or after 01 January 2016) to 31 December 2023 (up to 8 years)