Protective activity of processed tomato products on postprandial oxidation and inflammation: A clinical trial in healthy weight men and women.
Burton-Freeman, Britt 1,2; Talbot, Julie 1; Park, Eunyoung 1; Krishnankutty, Sandhya 1; Edirisinghe, Indika 1
[Article] Molecular Nutrition & Food Research. 56(4):622-631, April 2012.

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Scope: This study was designed to evaluate the ability of tomato rich in lycopene to modify postprandial oxidative stress, inflammation, and endothelial function in healthy weight individuals.

Methods and results: Twelve women and 13 men (mean age = 27 /- 8 years; mean body mass index= 22 /- 2) consumed high-fat meals known to induce postprandial oxidative stress on two separate occasions containing either processed tomato product or non-tomato alternative. Blood samples were collected at 0, 30, 60, 90, 120 min, then hourly until 360 min. Flow-mediated dilation (FMD) was performed at 0 and 210 min. Endpoints included changes in glucose, insulin, lipids, oxidized low-density lipoprotein (OxLDL), inflammatory cytokines, and FMD. Both meals induced increases in plasma glucose, insulin, and lipid concentrations (p < 0.05). A trend for higher triglycerides at >240 min was observed after the tomato meal (p = 0.006). Tomato significantly attenuated high-fat meal-induced LDL oxidation (p < 0.05) and rise in interleukin-6 (p < 0.0001), a proinflammatory cytokine and inflammation marker.

Conclusion: The data indicate that consuming tomato products with a meal attenuates postprandial lipemia-induced oxidative stress and associated inflammatory response. The relevance of OxLDL and inflammation to vascular injury suggests a potentially important protective role of tomato in reducing cardiovascular disease risk. Registration number - NCT00966550.

Copyright (C) 2012 John Wiley & Sons, Inc.