Cellular fatty acid uptake: The contribution of metabolism

Douglas G. Mashek, Rosalind A. Coleman

Research output: Contribution to journalReview article

107 Scopus citations

Abstract

Purpose of review: The aim of this review is to highlight the importance of fatty acid metabolism as a major determinant in fatty acid uptake. In particular, we emphasize how the activation, intracellular transport and downstream metabolism of fatty acids influence their uptake into cells. Recent findings: Studies examining fatty acid entry into cells have focused primarily on the roles of plasma membrane proteins or the question of passive diffusion. Recent studies, however, strongly suggest that a driving force governing fatty acid uptake is the metabolic demand for fatty acids. Both gain and loss-of-function experiments indicate that fatty acid uptake can be modulated by activation at both the plasma membrane and internal sites, by intracellular fatty acid binding proteins, and by enzymes in synthetic or degradative metabolic pathways. Although the mechanism is not known, it appears that converting fatty acids to acyl-CoAs and downstream metabolic intermediates increases cellular fatty acid uptake, probably by limiting efflux. Summary: Altered fatty acid metabolism and the accumulation of triacylglycerol and lipid metabolites has been strongly associated with insulin resistance and diabetes, but we do not fully understand how the entry of fatty acids into cells is regulated. Future studies of cellular fatty acid uptake should consider the influence of fatty acid metabolism and the possible interactions between fatty acid metabolism or metabolites and fatty acid transport proteins.

Original languageEnglish (US)
Pages (from-to)274-278
Number of pages5
JournalCurrent Opinion in Lipidology
Volume17
Issue number3
DOIs
StatePublished - Jun 2006

Keywords

  • Acyl-CoA
  • Fatty acid
  • Fatty acid transport
  • Lipid metabolism

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