Abstract
Until recently, brain phospholipid metabolism was thought to consume only 2% of the ATP consumed by the mammalian brain as a whole. In this paper, however, we calculate that 1.4% of total brain ATP consumption is consumed for the de novo synthesis of ether phospholipids and that another 5% is allocated to the phosphatidylinositide cycle. When added to previous estimates that fatty acid recycling within brain phospholipids and maintenance of membrane lipid asymmetries of acidic phospholipids consume, respectively, 5% and 8% of net brain ATP consumption, it appears that phospholipid metabolism can consume up to 20% of net brain ATP consumption. This new estimate is consistent with recent evidence that phospholipids actively participate in brain signaling and membrane remodeling, among other processes.
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Purdon, A.D., Rosenberger, T.A., Shetty, H.U. et al. Energy Consumption by Phospholipid Metabolism in Mammalian Brain. Neurochem Res 27, 1641–1647 (2002). https://doi.org/10.1023/A:1021635027211
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DOI: https://doi.org/10.1023/A:1021635027211