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- W2013749215 abstract "We investigated the effect of administration of docosahexaenoic acid (C22:6, n-3; 300 mg/kg.day, for 12 weeks) on the degree of membrane order and membrane-bound acetylcholinesterase activity of the cerebral cortex synaptic plasma membrane in male Wistar rats. Docosahexaenoic acid levels in the synaptic plasma membrane increased significantly by 16% over levels in control rats concomitant with an increase in the molar ratio of docosahexaenoic acid to arachidonic acid. Synaptic plasma membrane order, assessed by 1,6-diphenyl-1,3,5-hexatriene, which measures order of the bulk internal hydrophobic lipid core, decreased significantly in the docosahexaenoic acid-fed rats. Lateral mobility of both global and annular lipids measured by pyrene also increased. Acetylcholinesterase activity of the synaptic plasma membrane was unaffected, and synaptic plasma membrane phospholipid contents increased in the docosahexaenoic acid-fed rats, with a concomitant decrease in the cholesterol/phospholipid molar ratio. Lipid peroxide and reactive oxygen species, indicators of tissue oxidative stress, decreased in both the cerebral cortex synaptosome and homogenate of the docosahexaenoic acid-fed rats. Arrhenius plot showed a break point in acetylcholinesterase activity at 22 degrees C and 24 degrees C in plasma membranes from docosahexaenoic acid-fed and control rats, respectively. The present experiment indicates that chronic administration of docosahexaenoic acid does not affect synaptic acetylcholinesterase activity and evoke oxidative stress, although it increases the disorder of the global and annular lipids of rat synaptic plasma membranes." @default.
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- W2013749215 date "2004-04-01" @default.
- W2013749215 modified "2023-09-26" @default.
- W2013749215 title "Synaptic plasma membrane-bound acetylcholinesterase activity is not affected by docosahexaenoic acid-induced decrease in membrane order" @default.
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- W2013749215 doi "https://doi.org/10.1016/j.lfs.2003.10.028" @default.
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