BACKGROUND: Plasma accumulation of asymmetric dimethyl arginine (ADMA) is considered as a risk factor for endothelial dysfunction and a strong predictor for coronary heart diseases. Eicosapentaenoic (EPA) and docosahexaenoic (DHA) increasing plasma levels have been positively associated with reduced cardiovascular mortality with a mechanism( s) yet unclear. We hypothesised that ADMA reduction might be a part of EPA and DHA beneficial effects on the cardiovascular system. AIM: To verify this hypothesis we measured ADMA plasma levels in aged spontaneously hypertensive rats (SHR) supplemented for 8 weeks with EPA and DHA. METHODS: 16-month-old SHR were supplemented with EPA and DHA (EPA-DHA) or with olive oil (1 g/kg/day; OLIVE). At the end of the treatments, the plasma of each animal was analysed for 1) the total fatty acid composition, by gas-cromatography, 2) ADMA levels, by high pressure liquid chromatography, 3) nitrite and homocysteine concentration by chemiluminescence and by polarisation immunoassay respectively. Moreover, the activity of dimethyl arginine dimethyl amino hydrolase, the main enzyme involved in ADMA metabolism, was measured spectrophotometrically in the kidney from each rat. RESULTS: Animals supplemented with EPA and DHA showed: 1) lower ADMA and arachidonate plasma levels (587.4 +/- 113.7 nM and 0.49 +/- 0.11 mM respectively) than the values found in OLIVE rats (1365 +/- 399 nM and 1.07 +/- 0.07 mM respectively) 2) higher nitrite content (0.73 +/- 0.05 microM) than OLIVE (0.23 +/- 0.08 microM). CONCLUSIONS: EPA and DHA supplementation reduced ADMA accumulation in SHR in parallel with a decrease of arachidonate availability. This finding suggests that the control of the inflammatory ground of endothelium might play an important role in EPA and DHA effect on this novel and highly predictive cardiovascular risk factor.
BACKGROUND: Plasma accumulation of asymmetric dimethyl arginine (ADMA) is considered as a risk factor for endothelial dysfunction and a strong predictor for coronary heart diseases. Eicosapentaenoic (EPA) and docosahexaenoic (DHA) increasing plasma levels have been positively associated with reduced cardiovascular mortality with a mechanism( s) yet unclear. We hypothesised that ADMA reduction might be a part of EPA and DHA beneficial effects on the cardiovascular system. AIM: To verify this hypothesis we measured ADMA plasma levels in aged spontaneously hypertensiverats (SHR) supplemented for 8 weeks with EPA and DHA. METHODS: 16-month-old SHR were supplemented with EPA and DHA (EPA-DHA) or with olive oil (1 g/kg/day; OLIVE). At the end of the treatments, the plasma of each animal was analysed for 1) the total fatty acid composition, by gas-cromatography, 2) ADMA levels, by high pressure liquid chromatography, 3) nitrite and homocysteine concentration by chemiluminescence and by polarisation immunoassay respectively. Moreover, the activity of dimethyl arginine dimethyl amino hydrolase, the main enzyme involved in ADMA metabolism, was measured spectrophotometrically in the kidney from each rat. RESULTS: Animals supplemented with EPA and DHA showed: 1) lower ADMA and arachidonate plasma levels (587.4 +/- 113.7 nM and 0.49 +/- 0.11 mM respectively) than the values found in OLIVErats (1365 +/- 399 nM and 1.07 +/- 0.07 mM respectively) 2) higher nitrite content (0.73 +/- 0.05 microM) than OLIVE (0.23 +/- 0.08 microM). CONCLUSIONS:EPA and DHA supplementation reduced ADMA accumulation in SHR in parallel with a decrease of arachidonate availability. This finding suggests that the control of the inflammatory ground of endothelium might play an important role in EPA and DHA effect on this novel and highly predictive cardiovascular risk factor.
Authors: R M Krauss; R H Eckel; B Howard; L J Appel; S R Daniels; R J Deckelbaum; J W Erdman; P Kris-Etherton; I J Goldberg; T A Kotchen; A H Lichtenstein; W E Mitch; R Mullis; K Robinson; J Wylie-Rosett; S St Jeor; J Suttie; D L Tribble; T L Bazzarre Journal: Stroke Date: 2000-11 Impact factor: 7.914
Authors: Roberto Marchioli; Federica Barzi; Elena Bomba; Carmine Chieffo; Domenico Di Gregorio; Rocco Di Mascio; Maria Grazia Franzosi; Enrico Geraci; Giacomo Levantesi; Aldo Pietro Maggioni; Loredana Mantini; Rosa Maria Marfisi; G Mastrogiuseppe; Nicola Mininni; Gian Luigi Nicolosi; Massimo Santini; Carlo Schweiger; Luigi Tavazzi; Gianni Tognoni; Corrado Tucci; Franco Valagussa Journal: Circulation Date: 2002-04-23 Impact factor: 29.690
Authors: François Mariotti; Alexia Hammiche; Clémence Blouet; Sophie Daré; Daniel Tomé; Jean François Huneau Journal: Eur J Nutr Date: 2006-09-01 Impact factor: 5.614
Authors: Heidi Borgeraas; Elin Strand; Eva Ringdal Pedersen; Jutta Dierkes; Per Magne Ueland; Reinhard Seifert; Eirik Rebnord Wilberg; Pavol Bohov; Rolf K Berge; Dennis W T Nilsen; Ottar Nygård Journal: Cardiol Res Pract Date: 2012-12-31 Impact factor: 1.866