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Effects of Maturation on the Phospholipid and Phospholipid Fatty Acid Compositions in Primary Rat Cortical Astrocyte Cell Cultures

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Abstract

Phospholipid and phospholipid fatty acid compositional changes were studied in rat cortical astrocytes during dibutyryl cyclic adenosine monophosphate (dBcAMP, 0.25 mM) treatment starting after 14 days in culture (DIC). After 15 DIC, ethanolamine- and choline glycerophospholipid levels were increased 1.2- and 1.3-fold, respectively in treated compared to control cells. However, after 21 and 28 DIC, these levels were not significantly different between groups. Both groups had an increase in phosphatidylserine levels with increasing time in culture. Similarly, ethanolamine plasmalogen levels were transiently elevated after 21 DIC, but returned to previous levels after 28 DIC. The phospholipid fatty acid compositions for the acid stable and labile ethanolamine- and choline glycerophospholipids indicated that in dBcAMP treated cells, 20:4 n-6 and 22:6 n-3 proportions were elevated with increasing time in culture relative to control cells. As 20:4 n-6 proportions increased, there was a concomitant decrease in 20:3 n-9 proportions, suggesting an up regulation of n-6 series elongation and desaturation. In contrast, in control cells, the 20:4 n-6 proportions decreased with a corresponding increase in the 20:3 n-9 proportions. Thus, in treated cells, the cellular phospholipid fatty acid composition was dramatically different than control cells, suggesting that dBcAMP treatment may act to increase fatty acid elongation and desaturation.

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Authors and Affiliations

  1. Department of Veterinary Physiology & Pharmacology, Texas A & M University, College Station, TX, 77843-4466

    E. J. Murphy

  2. Department of Medical Biochemistry, The Ohio State University, Columbus, OH, 43210

    T. A. Rosenberger & L. A. Horrocks

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  1. E. J. Murphy
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  2. T. A. Rosenberger
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  3. L. A. Horrocks
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Murphy, E.J., Rosenberger, T.A. & Horrocks, L.A. Effects of Maturation on the Phospholipid and Phospholipid Fatty Acid Compositions in Primary Rat Cortical Astrocyte Cell Cultures. Neurochem Res 22, 1205–1213 (1997). https://doi.org/10.1023/A:1021924711675

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  • DOI: https://doi.org/10.1023/A:1021924711675

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