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Influence of Korean pine (Pinus koraiensis)-seed oil containing cis-5,cis-9, cis-12-octadecatrienoic acid on polyunsaturated fatty acid metabolism, eicosanoid production and blood pressure of rats

Published online by Cambridge University Press:  06 August 2007

Michihiro Sugano ,
Ikuo Ikeda ,
Kosaburo Wakamatsu  and
Takayuki Oka
Michihiro Sugano
Affiliation:
Laboratory of Food Science Kyushu University School of Agriculture, Fukuoka 812, Japan
Ikuo Ikeda
Affiliation:
Laboratory of Nutrition Chemistry. Kyushu University School of Agriculture, Fukuoka 812, Japan
Kosaburo Wakamatsu
Affiliation:
Laboratory of Nutrition Chemistry. Kyushu University School of Agriculture, Fukuoka 812, Japan
Takayuki Oka
Affiliation:
Laboratory of Nutrition Chemistry. Kyushu University School of Agriculture, Fukuoka 812, Japan
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Abstract

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The effects of dietary Korean pine (Pinus koraiensis)-seed oil containing a peculiar trienoic acid (cis-5, cis-9,cis-12-18:3, pinolenic acid, approximately 18%) on various lipid variables were compared in rats with those of flaxseed (Linum usitatissimum L.) oil, safflower (Carthamus tinctorius L.) oil and evening primrose (Oenothera biennis L.) oil under experimental conditions where the effects of different polyunsaturated fatty acids could be estimated. In Sprague-Dawley rats fed on diets containing 100 g fat and 5 g cholesterol/kg, the hypocholesterolaemic activity of pinolenic acid was intermediate between α-linolenic and linoleic acids. Analysis of the fatty acid composition of liver phosphatidylcholine indicated that, in contrast to α-linolenic acid, pinolenic acid does not interfere with the desaturation of linoleic acid to arachidonic acid. However, the effects on ADP-induced platelet aggregation and aortic prostacyclin production were comparable. When spontaneously hypertensive rats were fed on diets containing 100 g fat/kg but free of cholesterol, γ-linolenic and pinolenic acids, as compared with linoleic acid, increased prostacyclin production and tended to reduce platelet aggregation. In addition, pinolenic acid attenuated the elevation of blood pressure after 5 weeks of feeding. Thus, the results of the present studies indicate the beneficial effects of pinolenic acid on various lipid variables.

Keywords

Pine-seed oilLipid metabolismPlatelet aggregationHypertension
Type
Korean pine oil and lipid metabolism
Information
British Journal of Nutrition , Volume 72 , Issue 5 , November 1994 , pp. 775 - 783
Copyright
Copyright © The Nutrition Society 1994

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