Journals of Gerontology Series A: Biological Sciences and Medical Sciences Large Type Edition
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The Journals of Gerontology Series A: Biological Sciences and Medical Sciences 55:B144-B151 (2000)
© 2000 The Gerontological Society of America

Effect of Fruits, Vegetables, or Vitamin E–Rich Diet on Vitamins E and C Distribution in Peripheral and Brain Tissues

Implications for Brain Function

Antonio Martina, Ronald Priora, Barbara Shukitt-Halea, Guohua Caoa and James A. Josepha

a Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts

Antonio Martin, USDA-Neuroscience Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, 711 Washington Street, Boston, MA 02111 E-mail: amartin{at}hnrc.tufts.edu.

Jay Roberts, PhD

Age-related neurodegenerative conditions are the principal cause of declining cognitive and motor function during aging. Evidence support that fruits and vegetables containing generous amounts of antioxidant nutrients are important for neurological function. We investigated the effect of diets enriched with fruits or vegetables but low in vitamin E and a diet high in vitamin E on the distribution of vitamins C and E in the brain and dopamine release of Fischer 344 rat model, over an 8-month period. The low–vitamin E diet resulted in lowered {alpha}-tocopherol levels in brain and peripheral tissues, whereas the animals that received a diet enriched in vitamin E showed a significant increase, between 500–900%. Vitamin C concentration in plasma, heart, and liver was reduced in the vitamin E–supplemented group. It is concluded that supplementation or depletion of {alpha}-tocopherol for 8 months results in marked changes in vitamin E levels in brain tissue and peripheral tissues, and varied distribution of {alpha}-tocopherol throughout the different brain regions examined. In addition, compared to control group, rats supplemented with strawberry, spinach, or vitamin E showed a significant enhancement in striatal dopamine release. These findings suggest that other nutrients present in fruits and vegetables, in addition to the well-known antioxidants, may be important for brain function.




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