Consumption of a high-fat meal containing cheese compared with a vegan alternative lowers postprandial C-reactive protein in overweight and obese individuals with metabolic abnormalities: a randomised controlled cross-over study

Elieke Demmer, Marta D Van Loan, Nancy Rivera, Tara S Rogers, Erik R Gertz, J Bruce German, Angela M Zivkovic, Jennifer T Smilowitz, Elieke Demmer, Marta D Van Loan, Nancy Rivera, Tara S Rogers, Erik R Gertz, J Bruce German, Angela M Zivkovic, Jennifer T Smilowitz

Abstract

Dietary recommendations suggest decreased consumption of SFA to minimise CVD risk; however, not all foods rich in SFA are equivalent. To evaluate the effects of SFA in a dairy food matrix, as Cheddar cheese, v. SFA from a vegan-alternative test meal on postprandial inflammatory markers, a randomised controlled cross-over trial was conducted in twenty overweight or obese adults with metabolic abnormalities. Individuals consumed two isoenergetic high-fat mixed meals separated by a 1- to 2-week washout period. Serum was collected at baseline, and at 1, 3 and 6 h postprandially and analysed for inflammatory markers (IL-6, IL-8, IL-10, IL-17, IL-18, TNFα, monocyte chemotactic protein-1 (MCP-1)), acute-phase proteins C-reactive protein (CRP) and serum amyloid-A (SAA), cellular adhesion molecules and blood lipids, glucose and insulin. Following both high-fat test meals, postprandial TAG concentrations rose steadily (P < 0·05) without a decrease by 6 h. The incremental AUC (iAUC) for CRP was significantly lower (P < 0·05) in response to the cheese compared with the vegan-alternative test meal. A treatment effect was not observed for any other inflammatory markers; however, for both test meals, multiple markers significantly changed from baseline over the 6 h postprandial period (IL-6, IL-8, IL-18, TNFα, MCP-1, SAA). Saturated fat in the form of a cheese matrix reduced the iAUC for CRP compared with a vegan-alternative test meal during the postprandial 6 h period. The study is registered at clinicaltrials.gov under NCT01803633.

Keywords: CH, cheese; CRP, C-reactive protein; Dairy products; HOMA-IR, homoeostasis model assessment of insulin resistance; Inflammation; MCP-1, monocyte chemotactic protein-1; Metabolic syndrome; Obesity; Palm oil; Postprandial metabolism; SAA, serum amyloid-A; VA, vegan alternative; Vegan diets; WC, waist circumference; iAUC, incremental AUC; sICAM, soluble intracellular adhesion molecule.

Figures

Fig. 1.
Fig. 1.
Enrolment and follow up of participants in the randomised cross-over trial. CH, Cheddar cheese treatment; VA, vegan-alternative treatment.
Fig. 2.
Fig. 2.
Postprandial response of glucose (a) and insulin (b) before and after high-fat mixed meal rich in SFA from either vegan alternative cheese (---) or Cheddar cheese (––). Values are means, with standard deviations represented by vertical bars (n 20). * Significant difference between 0 and 1 h (P < 0·0005). † Significant difference between 1 and 3 h (P < 0·0005). ‡ Significant difference between 3 and 6 h (P = 0·01).
Fig. 3.
Fig. 3.
Postprandial response of serum TAG after both vegan alternative (---) and Cheddar cheese (––) meals. Values are means, with standard deviations represented by vertical bars (n 20). There was no difference between the treatments but there was a significant increase over time (P < 0·05) for all time points: 0–1, 0–3, 0–6, 1–3, 1–6, and 3–6 h.
Fig. 4.
Fig. 4.
Postprandial serum C-reactive protein (CRP) concentrations over the 6 h postprandial period after the Cheddar cheese (CH) and vegan alternative (VA) meals. Values are means, with standard deviations represented by vertical bars. * The VA meal resulted in a significantly greater overall CRP concentration (P = 0·033) when compared with the CH meal. iAUC, incremental AUC.

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