Docosahexaenoic Acid and Eicosapentaenoic Acid Induce Changes in the Physical Properties of a Lipid Bilayer Model Membrane

• Onuki Yoshinori

  Department of Pharmaceutics, Hoshi University

• Morishita Mariko

  Department of Pharmaceutics, Hoshi University

• Chiba Yoshiyuki

  Central Research Laboratory, Nippon Suisan Kaisya, Ltd.

• Tokiwa Shinji

  Central Research Laboratory, Nippon Suisan Kaisya, Ltd.

• Takayama Kozo

  Department of Pharmaceutics, Hoshi University

Bibliographic Information

Other Title

• Docosapentaenoic acid and eicosapentaenoic acid induce changes in the physical properties of a lipid bilayer model membrane

Abstract

We investigated the effect of fatty acids such as stearic acid (SA, 18:0), oleic acid (OA, 18:1), eicosapentaenoic acid (EPA, 20:5), and docosahexaenoic acid (DHA, 22:6) on a dipalmitoylphosphatidylcholine (DPPC) bilayer by determining the phase transition temperature, fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene (DPH), and detergent insolubility. Treatment with unsaturated fatty acid broadened and shifted the phase transitions of the DPPC bilayer to a lower temperature. The phase transition temperature and the value of fluorescence anisotropy of DPH at 37 °C decreased progressively with increasing treatment amounts of unsaturated fatty acid. A large amount of the DPPC bilayer treated with unsaturated fatty acid was dissolved in Triton X-100, obtaining a low level of detergent insolubility. These modifications of the bilayer physical properties were most pronounced with DHA and EPA treatment. These data show that unsaturated fatty acids, particularly DHA and EPA, induce a marked change in the lipid bilayer structure. The composition of fatty acids in the DPPC bilayer was similar after treatment with various unsaturated fatty acids, suggesting that the different actions of unsaturated fatty acids are attributed to change in the molecular structure (e.g., kinked conformation by double bonds). We further explored the change in physical properties induced by fatty acids dispersed in a water-in-oil-in-water multiple emulsion and found that unsaturated fatty acids acted efficiently on the DPPC bilayer, even when incorporated in emulsion form.

Journal

• Chemical and Pharmaceutical Bulletin

  Chemical and Pharmaceutical Bulletin 54 (1), 68-71, 2006

  The Pharmaceutical Society of Japan

Keywords

• docosahexaenoic acid
• eicosapentaenoic acid
• unsaturated fatty acid
• emulsion
• physical property
• dipalmitoylphosphatidylcholine (DPPC) bilayer

Details

• CRID: 1390282679145168128
• NII Article ID: 110004820326
• NII Book ID: AA00602100
• DOI: 10.1248/cpb.54.68
• ISSN: 13475223
• ISSN: 00092363
• NDL BIB ID: 7756666
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7756666
• Web Site: http://www.jstage.jst.go.jp/article/cpb/54/1/54_1_68/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed