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• W2076523914 endingPage "389" @default.
• W2076523914 startingPage "379" @default.
• W2076523914 abstract "We have determined the concentration of free fatty acids in membranes of slices prepared from the dentate gyrus following the induction of long-term potentiation in the anaesthetized rat. Compared to unpotentiated tissue, there was a significant increase in the concentration of free arachidonic acid 2.5 min, 45 min and 3 h after induction of long-term potentiation. There was no corresponding increase in oleic, stearic or palmitic acids. To account for the increase in free arachidonate, the activities of phospholipase A2, phospholipase A1 and phospholipase C were determined at the same three time intervals in control and potentiated tissue. Two-and-a-half minutes after the induction of long-term potentiation, activity of phospholipase A2 was enhanced, while at 45 min, and at 3 h phospholipase C activity was increased. These results suggest that the liberation of free arachidonate is due initially to phospholipase A2 activity, but that at later stages of long-term potentiation, control switches to phospholipase C. Subcellular fractionation experiments revealed an increase in free arachidonate in the postsynaptic density fraction 45 min after induction of long-term potentiation, without significant changes in synaptosomal- or glial-enriched fractions. These results are consistent with the hypothesis that arachidonic acid, released from a postsynaptic site, acts as a trophic retrograde synaptic signal in long-term potentiation in the dentate gyrus." @default.
• W2076523914 created "2016-06-24" @default.
• W2076523914 creator A5036989854 @default.
• W2076523914 creator A5042502272 @default.
• W2076523914 creator A5045353286 @default.
• W2076523914 date "1991-01-01" @default.
• W2076523914 modified "2023-09-30" @default.
• W2076523914 title "Increase in arachidonic acid concentration in a postsynaptic membrane fraction following the induction of long-term potentiation in the dentate gyrus" @default.
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• W2076523914 doi "https://doi.org/10.1016/0306-4522(91)90235-g" @default.
• W2076523914 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/1662336" @default.
• W2076523914 hasPublicationYear "1991" @default.
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