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Docosahexaenoic acid (DHA) supplementation has been shown to prevent specific age-related changes in the retina through biochemical and functional evaluations, but it is unclear how DHA supplementation affects the natural history of age-related macular degeneration (AMD). AMD is a disease affecting the macula, the part of the eye containing cone photoreceptors at the center of the visual field. The macula is responsible for vision in most daily functions, including reading, seeing fine details, and colour recognition. Severe AMD can lead to a central scotoma, severely impairing daily functioning. AMD can be divided into two forms: the more severe wet AMD, consisting of proliferation of new blood vessels in the retina, and dry AMD characterized by the development of drusen, a buildup of extracellular material . We are targeting the group with the highest risk of developing wet AMD: patients with unilateral wet AMD and dry AMD in their other eye. The study will consist of supplementing subjects with commercially available DHA supplements and monitoring their visual function in a comprehensive manner. Working in concert with clinical ophthalmologists and basic scientists, we will monitor DHA levels in the blood, inherited predispositions through genetic analysis, lipofuscin (an accumulated waste product) levels & AMD progression via fundus photography, visual acuity, and retinal function via full-field and multifocal electroretinograms. These different factors will be cross-correlated and evaluated to determine how DHA supplementation affects the development of AMD.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention
Age-Related Macular Degeneration
Ocean Nutrition MEG3 4020EE product, Flax seed oil capsule
Alberta Retina Consultants
Not yet recruiting
University of Alberta
Published on BioPortfolio: 2014-08-27T03:18:58-0400
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A plant genus of the family LINACEAE that is cultivated for its fiber (manufactured into linen cloth). It contains a trypsin inhibitor and the seed is the source of LINSEED OIL.
A body of water covering approximately one-fifth of the total ocean area of the earth, extending amidst Africa in the west, Australia in the east, Asia in the north, and Antarctica in the south. Including the Red Sea and the Persian Gulf, it constitutes the third largest ocean after the ATLANTIC OCEAN and the PACIFIC OCEAN. (New Encyclopaedia Britannica Micropaedia, 15th ed, 1990, p289)
Evaluation and measurement of nutritional variables in order to assess the level of nutrition or the NUTRITIONAL STATUS of the individual. NUTRITION SURVEYS may be used in making the assessment.
The air-dried exudate from the unripe seed capsule of the opium poppy, Papaver somniferum, or its variant, P. album. It contains a number of alkaloids, but only a few - MORPHINE; CODEINE; and PAPAVERINE - have clinical significance. Opium has been used as an analgesic, antitussive, antidiarrheal, and antispasmodic.
The study of NUTRITION PROCESSES, as well as the components of food, their actions, interaction, and balance in relation to health and disease in animals.
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