Dietary (n-3) fatty acids alter plasma fatty acids and leukotriene B synthesis by stimulated neutrophils from healthy geriatric Beagles

• Published in: Prostaglandins, leukotrienes and essential fatty acids Vol. 73; no. 5; pp. 335 - 341
• Main Authors: Hall, J.A., Henry, L.R., Jha, S., Skinner, M.M., Jewell, D.E., Wander, R.C.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-11-2005; Elsevier
• Subjects: Aging - metabolism; Animals; Biological and medical sciences; Corn Oil - administration & dosage; Diet; Dogs; Eating; Eicosapentaenoic Acid - analogs & derivatives; Eicosapentaenoic Acid - biosynthesis; Eicosapentaenoic Acid - blood; Fatty Acids - biosynthesis; Fatty Acids - blood; Fatty Acids, Omega-3 - administration & dosage; Female; Fundamental and applied biological sciences. Psychology; Leukotriene B4 - analogs & derivatives; Leukotriene B4 - biosynthesis; Leukotriene B4 - blood; Neutrophils - drug effects; Neutrophils - metabolism; Vertebrates: endocrinology; Leukotriene; Arachidonic acid derivatives; Eicosanoid; Polyunsaturated fatty acid; Unsaturated fatty acid; Lipids; Biosynthesis; Neutrophil; n-3 fatty acid; Fatty acids
• ISSN: 0952-3278; 1532-2823
• DOI: 10.1016/j.plefa.2005.07.006

The study objective was to determine the effect of feeding food enriched in (n-3) fatty acids (FA) on plasma FA profiles and leukotriene B (LTB) synthesis by stimulated peripheral blood neutrophils from dogs. For 36 weeks, two groups of dogs
(
n
=
5
)
were fed food that contained either a low ratio of (n-6)–(n-3) FA (1.31:1; fish oil-enriched food) or a high ratio of (n-6)–(n-3) FA (40.6:1; corn oil-enriched food). Consumption of food enriched in fish oil resulted in higher plasma concentrations of eicosapentaenoic acid and docosahexaenoic acid and lower concentrations of arachidonic acid. Neutrophils from dogs fed fish oil-enriched food produced 7.6-fold more LTB
5
(
P
=
0.002
)
, and the ratio of LTB
5–LTB
4 concentrations was 8.3-fold higher
(
P
<
0.001
)
compared with dogs fed corn oil-enriched food. Dietary FA can modulate leukotriene production by neutrophils in dogs, and suggests that foods enriched in (n-3) FA from fish oil may have value in the treatment of canine inflammatory diseases.