Effects of safflower oil and evening primrose oil in men with a low dihomo-gamma-linolenic level.
Atherosclerosis
; 81(3): 199-208, 1990 Apr.
Article
em En
| MEDLINE
| ID: mdl-2112389
ABSTRACT
Low levels of essential polyunsaturated fatty acids of the n-6 series are associated with coronary heart disease. Linoleic acid, but not gamma-linolenic acid requires the activity of delta 6-desaturase for its conversion to dihomo-gamma-linolenic and arachidonic acid. Evening primrose oil (EPO) and safflower oil (SO) are rich in linoleic acid, but EPO contains also 9% gamma-linolenic acid. The effect of EPO (10, 20 and 30 ml/day) and SO (20 ml/day) for 4 months on the deposition of linoleic acid metabolites in adipose tissue of 4 groups of 6-9 men with low adipose dihomo-gamma-linolenic acid was examined. EPO but not SO increased adipose dihomo-gamma-linolenic acid level from 0.080 +/- 0.005% to 0.101 +/- 0.005% (P less than 0.01; 20 ml/day for 4 months). Adipose dihomo-gamma-linolenic/linoleic acid ratio increased with EPO from 0.99 +/- 0.16 X 10(2) to 1.13 +/- 0.14 X 10(2) and fell on SO from 1.04 +/- 0.10 X 10(2) to 0.90 +/- 0.07 X 10(2) (P less than 0.01). Similar qualitative changes in the relative amount of dihomo-gamma-linolenic acid in serum triglyceride and cholesteryl ester fractions were observed. At the dose of 20 ml/day, SO and EPO did not differ in their effect on serum cholesterol (7.13 +/- 0.43 vs. 7.33 +/- 0.42 mmol/l (NS)), LDL-cholesterol (5.10 +/- 0.32 vs. 4.88 +/- 0.46 mmol/l (NS)) nor did the 2 oils differ in their effect on HDL-cholesterol. These results suggest that linoleic acid is not readily converted to dihomo-gamma-linolenic acid due to a low activity of delta 6-desaturase in these highly selected men. EPO was not an effective hypocholesterolaemic agent in this study.
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Base de dados:
MEDLINE
Assunto principal:
Óleos de Plantas
/
Óleo de Cártamo
/
Ácidos Graxos Essenciais
/
Ácido 8,11,14-Eicosatrienoico
/
Ácidos Graxos Insaturados
/
Hipolipemiantes
Tipo de estudo:
Qualitative_research
Limite:
Adult
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Atherosclerosis
Ano de publicação:
1990
Tipo de documento:
Article
País de afiliação:
Reino Unido