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Embryonic vs tumor lipids: II. Changes in phospholipids of developing chick brain, heart, and liver

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Lipids

Abstract

Brain, heart, and liver tissues were excised from embryos and chicks 10, 13, 16, 19, 22, 27, and 53 days after incubation was initiated and the lipids extracted. The quantitative distribution of the phospholipids and the fatty acid composition of the individual phosphatides were determined for each time period. Each tissue exhibited a distinct phospholipid composition that differed from the composition of egg. Elevated concentrations of particular phosphoglycerides that characterize certain mature tissues were observed at the earliest time period. As development progressed, some phospholipid classes in all tissues showed dramatic change, while others remained relatively constant. Brain showed the most stable composition, while the phosphatides of liver were the most dynamic. Each phospholipid class exhibited a characteristic fatty acid profile that was unique for each tissue. All of the phospholipid classes showed a change in fatty acid composition as development progressed, and, in some tissue, the change was dramatic. The fatty acid composition of brain phosphoglycerides showed the least change, while liver showed the greatest fluctuation. Docosahexaenoic acid and, in most cases, arachidonic acid decreased in the phosphoglycerides with increased development. The decrease in docosahexaenoic acid correlated well with the decreasing mitotic indices of heart and liver cells as development progressed. Comparison of observed abnormal lipid patterns between mature and neoplastic tissue with embryonic tissue lipid profiles suggest that some of the observed abnormalities of neoplasms probably are due to changes in lipid metabolism associated with rapidly proliferating cells, whereas other abnormalities appear to be associated with neoplasia.

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Authors and Affiliations

  1. Division of Gastroenterology, Departments of Medicine and Biochemistry, University of Missouri School of Medicine, 65201, Columbia, Missouri

    Randall Wood

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  1. Randall Wood
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Wood, R. Embryonic vs tumor lipids: II. Changes in phospholipids of developing chick brain, heart, and liver. Lipids 9, 429–439 (1974). https://doi.org/10.1007/BF02532061

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  • DOI: https://doi.org/10.1007/BF02532061

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