26 April 2017 In General Health

PURPOSE: Endothelial dysfunction and low-grade inflammation are key phenomena in the pathobiology of cardiovascular disease (CVD). Their dietary modification might explain the observed reduction in CVD that has been associated with a healthy diet rich in fruit, vegetables and fish, low in dairy products and with moderate alcohol and red wine consumption. We investigated the associations between the above food groups and endothelial dysfunction and low-grade inflammation in a population-based cohort of Dutch elderly individuals.

METHODS: Diet was measured by food frequency questionnaire (n = 801; women = 399; age 68.5 +/- 7.2 years). Endothelial dysfunction was determined (1) by combining von Willebrand factor, and soluble intercellular adhesion molecule 1 (sICAM-1), vascular cell adhesion molecule 1, endothelial selectin and thrombomodulin, using Z-scores, into a biomarker score and (2) by flow-mediated vasodilation (FMD), and low-grade inflammation by combining C-reactive protein, serum amyloid A, interleukin 6, interleukin 8, tumour necrosis factor alpha and sICAM-1 into a biomarker score, with smaller FMD and higher scores representing more dysfunction and inflammation, respectively. We used linear regression analyses to adjust associations for sex, age, energy, glucose metabolism, body mass index, smoking, prior CVD, educational level, physical activity and each of the other food groups.

RESULTS: Moderate [beta (95% CI) -0.13 (-0.33; 0.07)] and high [-0.22 (-0.45; -0.003)] alcohol consumption, and red wine [-0.16 (-0.30; -0.01)] consumption, but none of the other food groups, were associated with a lower endothelial dysfunction biomarker score and a greater FMD. The associations for FMD were, however, not statistically significant. Only red wine consumption was associated with a lower low-grade inflammation biomarker score [-0.18 (-0.33; -0.04)].

CONCLUSIONS: Alcohol and red wine consumption may favourably influence processes involved in atherothrombosis.

15 December 2016 In General Health

SCOPE: There is growing interest in understanding how human colonic microbiota can be modified by dietary habits. We examined the influence of moderate red wine intake on the colonic microbiota of 15 healthy volunteers, related to the high concentration of polyphenols present in this beverage. The volunteers were classified into high, moderate, and low polyphenol metabolizers (metabotypes) due to their ability to metabolize polyphenols and the results were compared with that of five control (no wine intake) subjects.

METHODS AND RESULTS: We analyzed the composition, diversity, and dynamics of their fecal microbiota before and after 1 month of wine consumption. The 16S rDNA sequencing allowed detection of 2324 phylotypes, of which only 30 were found over the 0.5% of mean relative frequency, representing 84.6% of the total taxonomical assignments. The samples clustered more strongly by individuals than by wine intake or metabotypes, however an increase in diversity, after the wine intake, was observed.

CONCLUSION: The results of this study suggest an increase in the global fecal microbial diversity associated to the consumption of red wine, confirm the high variability of the microbiota from different individuals, and show the stability of their singular microbiota composition to small and short-term dietary changes.

27 October 2016 In Cardiovascular System

BACKGROUND: Moderate consumption of red wine is associated with less cardiovascular events. We investigated whether red wine consumption counteracts the adverse vascular effects of cigarette smoking.

METHODS: Participants smoked three cigarettes, alone or after drinking a titrated volume of red wine. Clinical chemistry, blood counts, plasma cytokine ELISAs, immuno-magnetic separation of CD14+ monocytes for gene expression analysis, fluorescence-activated cell sorting for microparticles, isolation of circulating mononuclear cells to measure telomerase activity were performed and urine cotinine levels were quantified.

RESULTS: Compared to baseline, leukocytosis (p=0.019), neutrophilia (p<0.001), lymphopenia (p<0.001) and eosinopenia (p=0.008) were observed after only smoking. Endothelial as well as platelet-, monocyte- and leukocyte-derived microparticles (p<0.001 each) were elevated. In monocytes, mRNA expression of interleukin-6 (2.6+/-0.57-fold), tumor necrosis factor alpha (2.2+/-0.62-fold), and interleukin-1b (2.3+/-0.44-fold) were up-regulated as was interleukin-6 (1.2+/-0.12-fold) protein concentration in plasma. Smoking acutely inhibited mononuclear cell telomerase activity. Markers of endothelial damage, inflammation and cellular ageing were completely attenuated by red wine consumption.

CONCLUSION: Cigarette smoke results in acute endothelial damage, vascular as well as systemic inflammation and indicators of cellular ageing processes in otherwise healthy non-smokers. Pre-treatment with red wine was preventive. The findings underscore the magnitude of acute damage exerted by cigarette smoking in "occasional lifestyle smokers" and demonstrate the potential of red wine as a protective strategy to avert markers of vascular injury.

27 October 2016 In Diabetes

OBJECTIVE: To generate evidence-based conclusions about the effect of wine consumption on weight gain and abdominal fat accumulation and distribution in patients with type 2 diabetes.

DESIGN: In the 2-year randomized controlled CASCADE (CArdiovaSCulAr Diabetes & Ethanol) trial, patients following a Mediterranean diet were randomly assigned to drink 150 ml of mineral water, white wine or red wine with dinner for 2 years. Visceral adiposity and abdominal fat distribution were measured in a subgroup of sixty-five participants, using abdominal MRI.

SETTING: Ben-Gurion University of the Negev, Soroka-Medical Center and the Nuclear Research Center Negev, Israel.

SUBJECTS: Alcohol-abstaining adults with well-controlled type 2 diabetes.

RESULTS: Forty-eight participants (red wine, n 27; mineral water, n 21) who completed a second MRI measurement were included in the 2-year analysis. Similar weight losses (sd) were observed: red wine 1.3 (3.9) kg; water 1.0 (4.2) kg (P=0.8 between groups). Changes (95 % CI) in abdominal adipose-tissue distribution were similar: red wine, visceral adipose tissue (VAT) -3.0 (-8.0, 2.0) %, deep subcutaneous adipose tissue (DSAT) +5.2 (-1.1, 11.6) %, superficial subcutaneous adipose tissue (SSAT) -1.9 (-5.0, 1.2) %; water, VAT -3.2 (-8.9, 2.5) %, DSAT +2.9 (-2.8, 8.6) %, SSAT -0.15 (-3.3, 2.9) %. No changes in antidiabetic medication and no substantial changes in energy intake (+126 (sd 2889) kJ/d (+30.2 (sd 690) kcal/d), P=0.8) were recorded. A 2-year decrease in glycated Hb (beta=0.28, P=0.05) was associated with a decrease in VAT.

CONCLUSIONS: Moderate wine consumption, as part of a Mediterranean diet, in persons with controlled diabetes did not promote weight gain or abdominal adiposity.

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