Effects of Memantine on Magnetic Resonance (MR) Spectroscopy in Subjects at Risk for Alzheimer's Disease

Completed · Phase 4 · Has a placebo group

Conditions studied: Alzheimer's Disease

In brief

Recent data show that marked cell damage precedes the clinical manifestation of Alzheimer's disease (AD). Hence, targeting populations at risk with pharmacological interventions is a possible strategy to lessen the burden of the disease. Cognitively normal individuals with subjective memory complaints (SMC) manifest biological characteristics consistent with early AD and are at risk for future cognitive decline. Family history of AD also constitutes a risk. In a previous study the investigators showed that memantine slows down the accumulation of phosphorylated tau in normal SMC subjects. Using a multivoxel high field MR spectroscopy (MRS) technique, the investigators also demonstrated that memantine decreased hippocampal glutamate. Both these findings may be consistent with the drug's anti-excitotoxic activity. In this new project the investigators propose to treat a sample of 12 presymptomatic individuals at risk (SMC and family history of AD) with memantine. This will be a double blind, placebo controlled study with a control group (12 non-treated subjects). The investigators will determine whether the effects of memantine as assessed by cognitive performance and MRS are present after 4 months of treatment and persist 2 months after discontinuation. MRS will be used to evaluate the effect of memantine on levels of the neurotransmitter glutamate and neuronal viability marker N-acetylaspartate (NAA) in the hippocampus. The investigators will test the following hypotheses: 1. In subjects with SMC, memantine has modifying effects on brain biochemistry as reflected in MRS reductions in glutamate (reduced excitotoxicity) and increases in NAA (neuronal integrity). 2. The effects of the drug persist (as a marker of sustained neuroprotection) and can be measured 2 months after discontinuation of the treatment.

Key facts

Study ID

NCT00933608

Run by

NYU Langone Health

People needed

17

Starts

2009-07-01

Expected to finish

2011-09-01

Last updated by the study team

2014-10-21

Who can join

Age: 55 and older, up to 90. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• presence of subjective memory complaints without objective evidence of impaired cognition
• family history of Alzheimer's disease

You may not qualify if…

• major depression
• Parkinson's disease
• stroke
• seizures
• uncontrolled diabetes or hypertension
• current benzodiazepine use
• substance abuse
• contraindication for MRI
• contraindications for memantine

Where it is running

• NYU School of Medicine, Dept. of Psychiatry, Center for Brain Health — New York, New York, United States

Full record on ClinicalTrials.gov

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