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Folic acid administration has a modest anti-inflammatory effect in apoE deficient mice

Session Poster session 3

Speaker Evangelos Oikonomou

Event : ESC Congress 2015

  • Topic : basic science
  • Sub-topic : Basic Science - Vascular Biology and Physiology
  • Session type : Poster Session

Authors : P Kourkouti (Athens,GR), G Siasos (Athens,GR), A Briasoulis (Athens,GR), A Valatsou (Athens,GR), G Vogiatzi (Athens,GR), C Antoniades (Athens,GR), E Oikonomou (Athens,GR), M Zaromytidou (Athens,GR), D Perrea (Athens,GR), D Tousoulis (Athens,GR)

P. Kourkouti1 , G. Siasos1 , A. Briasoulis1 , A. Valatsou1 , G. Vogiatzi1 , C. Antoniades1 , E. Oikonomou1 , M. Zaromytidou1 , D. Perrea1 , D. Tousoulis1 , 1University of Athens Medical School, 1st Cardiology Department, “Hippokration” Hospital - Athens - Greece ,

European Heart Journal ( 2015 ) 36 ( Abstract Supplement ), 436

Background: Supplementation with folic acid (FA) has been proposed as a means to suspend atherosclerosis progression in subjects at risk. Recent large randomized clinical trials failed to document a benefit of a low dose folic acid administration in the clinical outcome of patients with atherosclerosis.

Purpose: As inflammation precedes atherosclerosis progression we sought to investigate the effects of high dose FA administration on inflammatory status in apolipoprotein E-deficient (apoE−/−) mice fed cholesterol-rich diet, an animal model of premature atherosclerosis

Methods: Apo E−/− mice were randomly assigned to four groups. The first group (n=9) was treated with regular diet (RD). The second group (n=18) was treated with RD and an aqueous solution of FA (75 mcg/kg/day). The third group (n=9) was treated with high-fat, high-cholesterol diet-western diet (WD). The fourth group (n=18) was treated with WD and FA for 6 weeks. Intereleukin (IL)-6, tumor necrosis factor alpha (TNFa) and regulated on activation, normal T cell expressed and secreted cytokine (RANTES) were measured with ELISA as well established inflammatory cytokines implicated in the progression of atherosclerosis.

Results: At the end of study period in mice fed with RD (group 1) FA treatment (group 2) decreased IL-6 levels [8.82 (3.51–35.37) pg/ml vs. 3.06 (1.42–3.552) pg/ml, p=0.01], while there was no impact in TNFa levels [2.30 (2.05–2.80) pg/ml vs. 2.10 (1.80–2.60) pg/ml, p=0.63] and in RANTES levels [12.25 (8.36–17.70) pg/ml vs. 9.80 (8.52–16.19) pg/ml, p=0.44]. In mice fed with WD (group 3), FA treatment (group 4) had no impact in IL-6 levels [4.93 (1.35–94.65) pg/ml vs. 20.25 (2.20–47.52) pg/ml, p=0.58], in TNFa levels [2.10 (1.70–5.89) pg/ml vs. 3.27 (2.50–4.32) pg/ml, p=0.17] and in RANTES levels [13.09 (10.43–30.42) pg/ml vs. 12.25 (5.90–29.88) pg/ml, p=0.69].

Conclusions: High dose folic acid administration in an atherosclerotic model of apoE deficient mice has only a modest anti-inflammatory effect and cannot reverse the additive atherosclerotic stimulus of a diet rich in cholesterol. These findings further elucidate the effects of folic acid administration in subjects with increased cardiovascular risk.

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