|The Association of Energy Intake and Expenditure, Macronutrients, Glycemic Index and Load, and General Characteristics With Postprandial Peptide YY 3-36 Serum Levels|
|Maryam Rahemi1, Mohmmad Alizadeh2|
|1Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
2Department of Nutrition, Food and Beverages Safety Research Center, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
CJMB 2018; 5: 107-114
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Keywords : Diet, Glycemic index, Glycemic load, Meals, Peptide YY
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Objectives: This study set out to determine the association between dietary intakes at lunch and postprandial peptide YY 3-36 (PYY3-36) 90-120 minutes after the consumption of lunch meal.
Materials and Methods: In the present cross-sectional study, the subjects (n = 176) were asked to eat their lunch at work on the test day. The postprandial concentration of PYY3-36 was measured 1.5 to 2 hours after the consumption of lunch meal.
Results: The subjects within the age range of 25 to 39 and those with ages less than 25 (P = 0.005) indicated the highest and the lowest levels of PYY3-36, respectively. Postprandial PYY3-36 had a direct significant association with fat content at lunch (P = 0.049) and had an inverse association with cholesterol (P = 0.001), docosahexaenoic acid (DHA) (P = 0.040) and eicosapentaenoic acid (EPA) (P = 0.022). Moreover, polyunsaturated fatty acids (PUFAs) and linoleic acid at lunch indicated a significant positive correlation with PYY3-36 (r = 0.182, P = 0.016 for both). Furthermore, a significant negative correlation was detected between energy intake at dinner and post-lunch PYY3-36 (r = -0.216, P = 0.004). Protein (OR [odds ratio] = 0.390, 95% CI: 0.160-0.950) and fat intake (OR = 2.697, 95%CI: 1.103-6.594) at lunch, energy intake at dinner (OR = 0.298, 95% CI: 0.127-0.702), and energy spent to perform physical activities after lunch (OR = 0.411, 95% CI: 0.182-0.929) significantly predicted the serum concentration of post-lunch PYY3-36. No significant association was found between PYY3-36 and glycemic index and load.
Conclusions: There was a significant association between dietary intakes at lunch meal and post-lunch serum concentration of PYY3-36. Further large-scale cross-sectional researches and randomized controlled trials are needed to confirm the mentioned results.
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