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- W1968270094 abstract "1. The distribution of radioactivity among lipid classes of myelin and other subcellular brain fractions of young rats (18–21 days) was determined after in vivo injection of (3-14C)-labelled ketone bodies, [U-14C]glucose or [2-14C]glucose. 2. The incorporation ratios (sterol/fatty acids) were 0.67 1.48 0.25 0.62 and 0.54 for whole brain, myelin, mitochondria, microsomes and synaptosomes, respectively, with (3-14C)-labelled ketone bodies as substrate and 0.37, 0.89, 0.19, 0.34 and 0.29 with [U-14C]glucose as substrate. These data show that, both in whole brain and in subcellular brain fractions, acetyl groups derived from ketone bodies are used for sterol synthesis to a larger extent than acetyl groups originating from glucose. 3. The specific radioactivity of cholesterol is much higher in myelin than in whole brain or in the other brain fractions, particularly after administration of labelled ketone bodies as substrate. 4. The incorporation patterns of acetoacetate and d-3-hydroxybutyrate were very similar, indicating that both ketone bodies contribute acetyl groups for lipid synthesis via the same metabolic route. 5. Our data suggest that a direct metabolic path from ketone bodies towards cholesterol exists — possibly via acetoacetyl-CoA formation in the cytosol of brain cells — and that this process is most active in oligodendrocytes." @default.
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- W1968270094 date "1981-12-01" @default.
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- W1968270094 title "Preferential utilization of ketone bodies for the synthesis of myelin cholesterol in vivo" @default.
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- W1968270094 doi "https://doi.org/10.1016/0005-2760(81)90300-3" @default.
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