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
Verified date | March 2024 |
Source | Biogen |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
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)
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. |
Country | Name | City | State |
---|---|---|---|
United States | Research Site | Cambridge | Massachusetts |
Lead Sponsor | Collaborator |
---|---|
Biogen |
United States,
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) |
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