The effect of N-3 fatty acids on plasma myeloperoxidase levels in healthy adults.
OBJECTIVE
To examine the effect of marine n-3 polyunsaturated fatty acids (PUFA) supplementation in a low to moderate and a high dose on plasma levels of myeloperoxidase (MPO) in healthy individuals.


BACKGROUND
Atherosclerosis is a chronic inflammatory disease and MPO, which is secreted primarily from activated neutrophils and monocytes, has pro-inflammatory properties and has been linked with both initiation and propagation of atherosclerosis. Marine n-3 PUFA have anti-inflammatory properties, but whether n-3 PUFA affect plasma levels of MPO is largely unknown.


METHODS
Sixty healthy adults were randomized to three groups receiving either 6.6 g PUFA/day, 2.0 g PUFA/day or a control oil (olive oil) for 12 weeks. Blood samples were drawn at baseline and after exposure. Plasma levels of MPO were measured using a MPO ELISA-kit (from Mercodia, Uppsala, Sweden) with specific mouse monoclonal antibodies.


RESULTS
Plasma MPO concentrations (microg/L) at baseline were 36.9 +/- 9.4; 36.2 +/- 7.1 and 35.4 +/- 11.3 (for high dose-, low dose- and control-group, respectively). After 12 weeks of supplementation we found no significant changes in plasma MPO in any of the groups nor between groups, with values after intervention of 36.1 +/- 8.6; 37.0 +/- 8.2 and 34.4 +/- 11.1, respectively.


CONCLUSIONS
Supplementation with n-3 PUFA has no effect on plasma levels of MPO in healthy adults with low baseline levels of MPO.
Andersen
V L
VL
Department of Cardiology, Aalborg-Aarhus University Hospital, Aarhus, Denmark.
Vogt
J
J
Obel
T
T
Christensen
J H
JH
Schmidt
E B
EB
D000284:Administration, Oral; D000328:Adult; D019587:Dietary Supplements; D004334:Drug Administration Schedule; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D000069463:Olive Oil; D009195:Peroxidase / Q000097:blood*; D010938:Plant Oils / Q000494:pharmacology
D015525:Fatty Acids, Omega-3; D000069463:Olive Oil; D010938:Plant Oils; D009195:Peroxidase