Effects of medium-chain fatty acids and their acylglycerols on the transport of penicillin V across Caco-2 cell monolayers

Motohiro Shima, Kaori Yohdoh, Masayo Yamaguchi, Yukitaka Kimura, Shuji Adachi, Ryuichi Matsuno

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26 Citations (Scopus)


The transport-enhancing effects of medium-chain fatty acids (caproic, caprylic, and capric acids) and their acylglycerols (mono-, di-, and triacylglycerols) were investigated by using Caco-2 cell monolayers as a model of the human intestinal epithelium. Penicillin V was used as a model for a hydrophilic bioactive compound. Among the fatty acids and acylglycerols tested, 1,2-dicaproin, monocaprin, monocaprylin, and capric acid sodium salt effectively enhanced the transport rate, whereas other substances enhanced the rate only slightly or not at all. With each of these four substances, the rate of enhancement was proportional to the concentration at low concentrations, but leveled off at high concentrations. The transport-enhancing effects were well correlated with the reduction in surface tension and with a physico-chemical parameter, denoted by the surface energy-lowering coefficient, characterizing the surface activity of a substance.

Original languageEnglish
Pages (from-to)1150-1155
Number of pages6
JournalBioscience, Biotechnology and Biochemistry
Issue number7
Publication statusPublished - Jan 1997



  • Caco-2
  • Medium-chain fatty acids and acylglycerols
  • Physico-chemical property
  • Surface activity
  • Transepithelial transport

ASJC Scopus subject areas

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry

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