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Titre du document / Document title

Selective increase in pinolenic acid (all-cis-5,9,12-18:3) in Korean pine nut oil by crystallization and its effect on LDL-receptor activity

Auteur(s) / Author(s)

LEE Jin-Won ; LEE Kwang-Won ; LEE Seog-Won ; KIM In-Hwan ; RHEE Chul ;

Résumé / Abstract

The aims of this study were to obtain concentrated pinolenic acid (5,9,12-18:3) from dietary Korean pine (Pinus koraiensis) nut oil by urea complexation and to investigate its cholesterol-lowering effect on the LDL-receptor activity of human hepatoma HepG2 cells. Pine nut oil was hydrolyzed to provide a low-pinolenic acid-containing FA extract (LPAFAE), followed by crystallization with different ratios of urea in ethanol (EtOH) or methanol (MeOH) as a solvent to produce a high-pinolenic acid-containing FA extract (HPAFAE). The profiles of HPAFAE obtained by urea complexation showed different FA compositions compared with LPAFAE. The long-chain saturated FA palmitic acid (16:0) and stearic acid (18:0) were decreased with urea/FA ratios (UFR) of 1:1 (UFR1), 2:1 (UFR2), and 3:1 (UFR3). Linoleic acid (9,12-18:2) was increased 1.3 times with UFR2 in EtOH, and linolenic acid (9,12,15-18:3) was increased 1.5 times with UFR3 in MeOH after crystallization. The crystallization with UFR3 in EtOH provided the highest concentration of pinolenic acid, which was elevated by 3.2-fold from 14.1 to 45.1%, whereas that of linoleic acid (9,12-18:2) was not changed, and that of oleic acid (9-18:1) was decreased 7.2-fold. Treatment of HepG2 cells with HPAFE resulted in significantly higher internalization of 3,3'-dioctadecylindocarbocyanine-LDL (47.0 ′ 0.15) as compared with treatment with LPAFAE (25.6 ′ 0.36) (P< 0.05). Thus, we demonstrate a method for the concentration of pinolenic acid and suggest that this concentrate may have LDL-lowering properties by enhancing hepatic LDL uptake.

Revue / Journal Title

Lipids    ISSN  0024-4201   CODEN LPDSAP 

Source / Source

2004, vol. 39, no4, pp. 383-387 [5 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1966) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 12988, 35400011389799.0100

Nº notice refdoc (ud4) : 16003808



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