Does Memantine Improve Verbal Memory Task Performance in Subjects With Partial Epilepsy and Memory Dysfunction?
Many patients with epilepsy have memory deficits in the setting of otherwise normal intelligence. Unfortunately, the treatment options for memory dysfunction in patients with epilepsy are limited. The investigators are conducting a study to evaluate the effects of memantine for the treatment of verbal memory dysfunction in subjects with localization-related seizures. The study involves randomization to memantine therapy or placebo, with cognitive testing and EEG pre- and post-treatment, as well as after an open-label memantine treatment phase.
The primary aim of this study is to evaluate the efficacy of memantine for the treatment of verbal memory dysfunction in subjects with left temporal lobe epilepsy. The investigators expect that verbal memory task performance will improve in those taking memantine, but not in those taking a placebo.
The investigators propose that the expected benefit of memantine is specific to verbal memory in subjects with left temporal lobe seizures, rather than representing an overall improvement in cognitive function. The investigators expect no improvement on other cognitive tasks in either the memantine or placebo groups.
The investigators will evaluate whether subjects with left temporal lobe epilepsy and memory difficulties have self-reported improvement in memory while taking memantine. The investigators expect improvement of self-rated memory function on the Quality of Life in Epilepsy Patient Inventory (QOLIE-89) in the memantine group, but no change on this scale in the placebo group.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Participant, Care Provider, Investigator, Outcomes Assessor
Primary Purpose: Treatment
|Official Title:||Does Memantine Improve Verbal Memory Task Performance in Subjects With Localization-related Epilepsy and Memory Dysfunction? A Randomized, Double-Blind, Placebo-Controlled Trial|
- The change scores from pre- and post-treatment neuropsychological test evaluations will be compared between the placebo and memantine treatment groups. If the distributions are normal, we will perform a two-sample t-test. [ Time Frame: 5 years ]
- To test the hypothesis that improvement will be selective for verbal memory, change scores on the non-verbal tasks will be compared between the placebo and memantine treatment groups. If the distributions are normal, we will conduct a two-sample t-test. [ Time Frame: 5 years ]
- To test the hypothesis that treatment with memantine will result in subjective improvement of memory function, the change scores from the QOLIE-89 will be evaluated. If the distributions are normal, we will proceed with a two-sample t-test [ Time Frame: 5 years ]
- A secondary analysis will examine the possible sustained benefit of continued memantine use. [ Time Frame: 5 years ]SRT-CLTR and 7-24 Spatial Memory Test scores will be assessed across the first (baseline), second (post-blinded period) and third (post-open label memantine) testing sessions. The expectation is that subjects randomized to memantine will demonstrate sustained improvement from baseline, while the placebo group will demonstrate improvements after taking open label memantine (compared to baseline and Week 13).
|Study Start Date:||January 2009|
|Study Completion Date:||May 2014|
|Primary Completion Date:||May 2014 (Final data collection date for primary outcome measure)|
Subjects will randomly assigned to take either a placebo or memantine for 13 weeks. The assignment will be double-blind, neither the study members nor the subject will know if he/she is taking memantine or a placebo.
All subjects in the treatment group will be placed on memantine. The dosage of memantine will begin at 5mg once per day (qday), and increase by 5mg every week. The titration will continue over a period of 3 weeks until a goal of 10mg bid is reached. The dosing will increase slowly, to minimize the risk of side effects. The subject will then remain on memantine at 10mg bid for 10 weeks, until the conclusion of the first phase of the study. At the conclusion of the first 13 weeks, subjects will discontinue the treatment (memantine or placebo) and enter the open label phase.
Other Name: NamendaDrug: Memantine
Open label: When the blinded phase is complete (Weeks 1-13), all subjects will receive open-label treatment with memantine (Weeks 14-26). The dosage of memantine will begin at 5mg once per day (qday), and increase by 5mg every week. The titration will continue over a period of 3 weeks until a goal of 10mg bid is reached. The dosing will increase slowly, to minimize the risk of side effects. The subject will then remain on memantine at 10mg bid for 10 weeks, until the conclusion of the study. At the conclusion of the study, subjects will discontinue the treatment.
Other Name: Namenda
Placebo Comparator: Sugar Pill
Subjects will be randomly assigned to take either memantine or a placebo. The study is double-blind, and neither the study members nor the subject will know if he/she is taking memantine or a placebo.
Other: Sugar Pill
In the control arm of the study, subjects will take one placebo sugar pill per day for one week, then increase to one tablet twice per day for the following 12 weeks. At the end of this phase of the study, subjects will enter the open-label phase (unblinded treatment with memantine).
Other Name: Placebo
Show Detailed Description
Please refer to this study by its ClinicalTrials.gov identifier: NCT01054599
|United States, Georgia|
|Atlanta, Georgia, United States, 30322|
|United States, Massachusetts|
|Massachusetts General Hospital|
|Boston, Massachusetts, United States, 02114|
|Newton, Massachusetts, United States, 02462|
|Principal Investigator:||Lauren Moo, M.D.||Massachusetts General Hospital|