do Rosario, VA and Chang, C and Spencer, J and Alahakone, T and Roodenrys, S and Francois, M and Weston-Green, K and Holzel, N and Nichols, DS and Kent, K and Williams, D and Wright, IMR and Charlton, K, Anthocyanins attenuate vascular and inflammatory responses to a high fat high energy meal challenge in overweight older adults: a cross-over, randomized, double-blind clinical trial, Clinical Nutrition, 40, (3) pp. 879-889. ISSN 0261-5614 (2020) [Refereed Article]
Copyright 2020 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism
Background & aims: Postprandial metabolic imbalances are important indicators of later developing cardiovascular disease (CVD). This study investigated the effects of food anthocyanins on vascular and microvascular function, and CVD associated biomarkers following a high fat high energy (HFHE) meal challenge in overweight older adults.
Methods: Sixteen subjects (13 female, 3 male, mean age 65.9 SD 6.0 and body mass index 30.6 kg/m2 SD 3.9) participated in a crossover, randomized, controlled, double-blind clinical trial (registered under Australian New Zealand Clinical Trials Registry, identifier no. ACTRN12620000437965). Participants consumed a HFHE meal with a 250 mL dose of either intervention (anthocyanins-rich Queen Garnet Plum) or control (apricot) juice. Blood samples and blood pressure measures were collected at baseline, 2 h and 4 h following the HFHE meal. Vascular and microvascular function were evaluated at baseline and 2 h after the HFHE meal.
Results: Participants had a higher 2 h postprandial flow-mediated dilatation (+1.14%) and a higher microvascular post-occlusive reactive hyperaemia (+0.10 perfusion units per mmHg) when allocated to the anthocyanin compared to the control arm (P = 0.019 and P = 0.049, respectively). C-reactive protein was lower 4 h postprandially in the anthocyanins (1.80 mg/L, IQR 0.90) vs control arm (2.30 mg/L, IQR 1.95) (P = 0.026), accompanied by a trend for lower concentrations of interleukin-6 (P = 0.075). No significant postprandial differences were observed between treatments for blood pressure, triacylglycerol, total cholesterol, serum derivatives of reactive oxidative metabolites, tumor necrosis factor alpha, interleukin-1 beta, or maximum microvascular perfusion following iontophoresis of acetylcholine.
Conclusion: Fruit-based anthocyanins attenuated the potential postprandial detrimental effects of a HFHE challenge on parameters of vascular and microvascular function, and inflammatory biomarkers in overweight older adults. Anthocyanins may reduce cardiovascular risk associated with endothelial dysfunction and inflammatory responses to a typical high fat 'Western' meal. Further studies are required to better elucidate the clinical implications of postprandial biomarkers of CVD.
|Item Type:||Refereed Article|
|Keywords:||anthocyanin, flavonoid, inflammation, endothelium, vascular|
|Research Division:||Biomedical and Clinical Sciences|
|Research Group:||Nutrition and dietetics|
|Research Field:||Nutrigenomics and personalised nutrition|
|Objective Group:||Clinical health|
|Objective Field:||Clinical health not elsewhere classified|
|UTAS Author:||Holzel, N (Ms Nadine Macha)|
|UTAS Author:||Nichols, DS (Dr David Nichols)|
|UTAS Author:||Kent, K (Dr Katherine Kent)|
|Deposited By:||UTAS Centre for Rural Health|
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