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Membrane fatty acid modification in tumor cells: A potential therapeutic adjunct

  • Published:
Lipids

Abstract

The fatty acid compositions of several tumors have been modified sufficiently to alter some of their properties and functions. These modifications were produced in culture by adding specific fatty acids to the growth medium or by feeding fat-supplemented diets to tumor-bearing mice. The phospholipid fatty acid composition of the plasma membrane was modified, but there were no changes in membrane phospholipid or cholesterol content or in phospholipid head group composition. Each of the most abundant membrane phosphoglyceride fractions exhibited some degree of fatty acid modification. Electron spin resonance measurements with nitroxystearate spin probes indicated that the fatty acid modifications were sufficient to alter the physical properties of the plasma membrane. The K ′ m for methotrexate uptake was reduced when the L1210 leukemia cells were enriched in linoleic acid. Even when the kinetics of uptake at 37 C were not altered, such as for melphalan and phenylalanine uptake, the temperature transition of transport was modified, indicating that these transport systems also are responsive to the membrane fatty acid modifications. Enrichment with highly polyunsaturated fatty acid did not affect either the growth rate or radiosensitivity of the L1210 leukemia. However, the sensitivity of the L1210 cells to the cytotoxic effects of Adriamycin and hyperthermia was increased. These findings suggest the possibility that fatty acid modification of tumors may be a useful adjunct to certain currently available therapeutic modalities.

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Authors and Affiliations

  1. Department of Internal Medicine, University of Iowa, 52242, Iowa City, IA

    C. Patrick Burns & Arthur A. Spector

  2. Department of Biochemistry, University of Iowa, 52242, Iowa City, IA

    C. Patrick Burns & Arthur A. Spector

Authors
  1. C. Patrick Burns
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  2. Arthur A. Spector
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Burns, C.P., Spector, A.A. Membrane fatty acid modification in tumor cells: A potential therapeutic adjunct. Lipids 22, 178–184 (1987). https://doi.org/10.1007/BF02537299

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  • DOI: https://doi.org/10.1007/BF02537299

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