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Preventing dementia is an important goal for our aging population. This proposal is an initial 42 months study of the effect of standardized ginkgo biloba extract (GBE) on preventing or delaying cognitive decline in people age 85 years or older (the oldest old). The study focuses on the oldest old who present a distinct advantage for primary prevention studies because of their particularly high risk for developing mild cognitive impairment (MCI), a precursor to dementia. Because this is a population that has previously been out of the mainstream for use of alternative medicine, the safety of GBE in this age group will also be tested in this study. The study is randomized, placebo controlled and double blind. Approximately 200 elderly cognitively healthy subjects will be enrolled and followed for detection of conversion to MCI. This pilot study is viewed as a necessary first step in order to demonstrate that GBE, an alternative or complementary therapy, has a disease modifying effect on the brain, distinct from a symptomatic effect. The study will test the feasibility of the randomized start design, a trial design proposed as a method for discerning brain- or disease- modifying from symptomatic effects. The magnitude of biological effect of the treatments will also be assessed with volumetric quantitative MRI, a complementary means of confirming whether there is a brain modifying effect (measured as a decrease in brain volume loss with treatment). Peripheral markers of oxidation status will measure possible anti-oxidant effects of GBE.
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Allocation: Randomized, Control: Placebo Control, Masking: Double-Blind, Primary Purpose: Prevention
Ginkgo Biloba Extract
Oregon Health Sciences University/Neurology
National Center for Complementary and Alternative Medicine (NCCAM)
Published on BioPortfolio: 2014-08-27T03:57:08-0400
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The only specie of the genus Ginkgo, family Ginkgoacea. It is the source of extracts of medicinal interest, especially Egb 761. Ginkgo may refer to the genus or species.
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