Selective transport of long-chain fatty acids by FAT/CD36 in skeletal muscle of broilers

Animal. 2013 Mar;7(3):422-9. doi: 10.1017/S1751731112001619. Epub 2012 Aug 16.

Abstract

Fatty acid translocase (FAT/CD36) is a membrane receptor that facilitates long-chain fatty acid uptake. To investigate its role in the regulation of long-chain fatty acid composition in muscle tissue, we studied and compared FAT/CD36 gene expression in muscle tissues of commercial broiler chickens and Chinese local Silky fowls. The results from gas chromatography-mass spectrometry analysis of muscle samples demonstrated that Chinese local Silky fowls had significantly higher (P < 0.05) proportions of linoleic acid (LA) and palmitic acid, lower proportions (P < 0.05) of arachidonic acid (AA) and oleic acid than the commercial broiler chickens. The mRNA expression levels of fatty acid (FA) transporters (FA transport protein-1, membrane FA-binding protein, FAT/CD36 and caveolin-1) in the m. ipsilateral pectoralis and biceps femoris were analyzed by Q-PCR, and FAT/CD36 expression levels showed significant differences between these types of chickens (P < 0.01). Interestingly, the levels of FAT/CD36 expression are positively correlated with LA content (r = 0.567, P < 0.01) but negatively correlated with palmitic acid content (r = -0.568, P < 0.01). Further experiments in the stably transfected Chinese hamster oocytes cells with chicken FAT/CD36 cDNA demonstrated that overexpression of FAT/CD36 improves total FA uptake with a significant increase in the proportion of LA and AA, and a decreased proportion of palmitic acid. These results suggest that chicken FAT/CD36 may selectively transport LA and AA, which may lead to the higher LA deposition in muscle tissue.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arachidonic Acid / metabolism
  • Biological Transport
  • CD36 Antigens / metabolism*
  • CHO Cells
  • Chickens / metabolism*
  • China
  • Cricetinae
  • Cricetulus
  • DNA Primers / genetics
  • Fatty Acids / metabolism*
  • Gas Chromatography-Mass Spectrometry
  • Gene Expression Regulation / physiology*
  • Linoleic Acid / metabolism
  • Male
  • Muscle, Skeletal / metabolism*
  • Oleic Acid / metabolism
  • Palmitic Acid / metabolism
  • Polymerase Chain Reaction
  • Species Specificity

Substances

  • CD36 Antigens
  • DNA Primers
  • Fatty Acids
  • Arachidonic Acid
  • Oleic Acid
  • Palmitic Acid
  • Linoleic Acid