This trial is active, not recruiting.

Condition multiple sclerosis
Treatment observational cognitive assessments
Sponsor Clinique Neuro-Outaouais
Collaborator CogState Ltd.
Start date December 2014
End date November 2017
Trial size 47 participants
Trial identifier NCT02383550, CNO-002


This study is designed to demonstrate that Tysabri is effective in maintaining cognition in MS patients after 5 or more years of continuous treatment.

During a second period of 36 months, the extension study will assess the evolution of cognitive function in Tysabri treated MS patients using the Symbol Digit Modalities Test (SDMT) and a CogState battery of tests.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Observational model cohort
Time perspective prospective

Primary Outcomes

time frame: 3 years
Cogstate Battery
time frame: 3 years

Eligibility Criteria

Male or female participants at least 18 years old.

Inclusion Criteria: - Patients who have completed the original study and are willing to continue into the extension. Exclusion Criteria: - Patients with cognitive decline from causes other than MS (i.e., PML, stroke, sleep apnea, neurodegenerative disorders, brain tumors).

Additional Information

Official title Cognitive Evolution in Tysabri Treated Multiple Sclerosis Patients - A Three Year Extension
Principal investigator Francois Jacques, MD
Description Tysabri reduces the relapse frequency, slows progression and preserves cognitive function as compared to placebo as per the AFFIRM trial. The benefit on relapse rate and progression appears to be sustained in longer-term studies such as STRATA. In clinical practice however despite a stable EDSS patients often complain of cognitive deterioration. The investigators' preliminary results from the first pilot study have shown that cognition in Tysabri treated MS patients for two or more years, as measured by the SDMT or Cogstate battery is maintained, including the ability to learn. The investigators' final data will be presented at the American Academy of Neurology (AAN) in 2015. The Symbol Digit Modalities Test (SDMT) is a sensitive and validated test of cognition in MS. CogState offers a standardized battery of cognitive tests frequently used in clinical research in the fields of dementia and Parkinson's disease. The CogState battery of tests consisting of the Detection test (processing speed), Identification test (attention), One Back test (working memory), International Shopping List test (verbal learning) and the Groton Maze Learning test (reasoning and problem solving) will further confirm and validate the results of the SDMT in MS patients as well as examine other cognitive domains. The Beck Depression Inventory-II [Beck 1996] is a validated and well recognized clinical research tool for depression in the field of multiple sclerosis. Together the above tests done prospectively can assess the evolution of cognitive function in Tysabri treated MS patients over the longer term.
Trial information was received from ClinicalTrials.gov and was last updated in July 2016.
Information provided to ClinicalTrials.gov by Clinique Neuro-Outaouais.