Fisheries Science

, Volume 77, Issue 6, pp 1045–1052 | Cite as

Effects of protamine hydrochloride from chum salmon milt on lipid metabolism in rats

  • Yoshinori Takahashi
  • Tatsuya Konishi
  • Hiroyuki Enari
  • Heon-sik Lee
  • Won Kyung Lee
  • Young Sun Lee
  • Hyoung Kook Park
  • Shigeru Yamamoto
Original Article Chemistry and Biochemistry

Abstract

Protamine is a basic protein whose sulfate is used in medical applications as a carrier for injectable insulin and as a heparin antagonist, while its hydrochloride is used as an antibacterial ingredient for some food products. We previously showed that protamine hydrochloride derived from chum salmon milt inhibited pancreatic lipase and reduced plasma triacylglycerol levels in an oral fat tolerance test in humans. The present study evaluated the effect of chum protamine hydrochloride on lipid metabolism in rats. The single oral administration of protamine hydrochloride (500 mg/kg) reduced plasma triacylglycerol levels in a corn oil tolerance test, and repeated oral administration at a dose of 0, 150, 500, or 1,500 mg/kg with a high fat diet for 7 weeks significantly reduced body weight gain, liver weight, and epididymal adipose tissue, whereas total calorie intakes were not significantly different. These findings could be caused by the suppression of lipid digestibility leading to a significant increase in fecal lipid excretion due to the fact that protamine hydrochloride could bind with bile acids to make a complex that is difficult to digest. Protamine hydrochloride, with a considerable history as food, can be considered to be promising as an anti-obesity functional food material.

Keywords

Protamine hydrochloride Chum salmon milt Lipase inhibitor Bile acid Digestive resistant complex Anti-obesity Fat accumulation Functional food material 

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Copyright information

© The Japanese Society of Fisheries Science 2011

Authors and Affiliations

  • Yoshinori Takahashi
    • 1
  • Tatsuya Konishi
    • 1
  • Hiroyuki Enari
    • 1
  • Heon-sik Lee
    • 2
  • Won Kyung Lee
    • 2
  • Young Sun Lee
    • 2
  • Hyoung Kook Park
    • 2
  • Shigeru Yamamoto
    • 3
  1. 1.Central Research InstituteMaruha Nichiro Holdings, Inc.TsukubaJapan
  2. 2.R&D CenterLG Household and Health Care Co., Ltd.DeajeonKorea
  3. 3.International Nutrition, Department of Food and NutritionJumonji UniversityNiizaJapan

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