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Lipids in blood-brain barrier models in vitro II: Influence of glial cells on lipid classes and lipid fatty acids

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Summary

Lipids of brain tissue and brain microvascular endothelial cells contain high proportions of long-chain polyunsaturated fatty acids (long PUFAs). The blood-brain barrier (BBB) is formed by the brain endothelial cells under the inductive influence of brain cells, especially perivascular glia, and coculture of endothelial cells and glial cells has been used to examine this induction. The objective of this study was to investigate whether C6 glioma cells are able to influence the lipid composition and shift the fatty acid (FA) patterns of the BBB model cell lines RBE4 and ECV304 toward the in vivo situation. Lipid classes of the three cell lines were analyzed by thin-layer chromatography and lipid FA patterns by high-performance liquid chromatography. Only ECV304 cells showed altered lipid composition in coculture, with C6 cells. The fractions of triglycerides and cholesteryl esters (depending on the support filter) were about twice as high in coculture as when the cells were grown alone. Triglyceride fractions reached 13 to 15% of total lipids in coculture. The three cell lines showed an increase in the percentage of long PUFAs with respect to unsaturated FAs, mainly because of an increase in the percentages of arachidonic acid, all cis-7,10,13,16-docosatetraenoic, acid, and all cis-7,10,13,16,19-docosapentaenoic acid. It is concluded that glioma C6 cells are able to induce a more in vivo-like FA pattern in BBB cell culture models. However, changes were not significant for the individual PUFAs, and their levels did not reach in vivo values.

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Authors and Affiliations

  1. Institute of Pharmaceutical Sciences, ETH, Winterthurerstr. 190, CH-8057, Zurich, Switzerland

    Heidi Wunderli-Allenspach

  2. Centre for Neuroscience Research, GKT School of Biomedical Sciences, King's College London, SE1 1UL, London, UK

    Stefanie D. Krämer, Yannic B. Schütz, N. Joan Abbott & David J. Begley

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  1. Stefanie D. Krämer
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  2. Yannic B. Schütz
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  3. Heidi Wunderli-Allenspach
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  4. N. Joan Abbott
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  5. David J. Begley
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Correspondence to Stefanie D. Krämer.

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Krämer, S.D., Schütz, Y.B., Wunderli-Allenspach, H. et al. Lipids in blood-brain barrier models in vitro II: Influence of glial cells on lipid classes and lipid fatty acids. In Vitro Cell.Dev.Biol.-Animal 38, 566–571 (2002). https://doi.org/10.1290/1543-706X(2002)38<566:LIBBMI>2.0.CO;2

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  • DOI: https://doi.org/10.1290/1543-706X(2002)38<566:LIBBMI>2.0.CO;2

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