TY - JOUR
T1 - Postprandial peptide YY is lower in young college-aged women with high dietary cognitive restraint
AU - Scheid, J. L.
AU - Birch, L. L.
AU - Williams, N. I.
AU - Rolls, B. J.
AU - De Souza, M. J.
N1 - Funding Information:
This project was supported by a Penn State University and National Institutes of Health : Clinical and Translational Science Award Pilot Project Grant and in part by a Canadian Institute of Health Doctoral Research Award.
PY - 2013/8/15
Y1 - 2013/8/15
N2 - Acylated ghrelin and peptide YY (PYY3-36) are involved in appetite-regulation and energy homeostasis. These gastrointestinal hormones provide peripheral signals to the central nervous system to regulate appetite and short term food intake, and interact with leptin and insulin to regulate energy balance. Dietary restraint is an eating behavior phenotype that manifests as a conscious cognitive control of food intake in order to achieve or sustain a desired body weight. The purpose of the current study was to determine if college-aged women (18 to 25years) with different eating behavior phenotypes, i.e., high vs normal dietary restraint, differ with respect to circulating concentrations of gastrointestinal hormones during and following a test meal. We hypothesized that women with high dietary cognitive restraint [High CR (score≥13, n=13)] would have elevated active ghrelin and PYY3-36 concentrations after a test meal compared to women with normal dietary cognitive restraint [Normal CR (score<13, n=30)]. Gastrointestinal hormones were assessed before (-15 and 0min) and after (10, 15, 20, 30, 60, 90, 120 and 180min) the consumption of a mixed composition meal (5.0kcal per kg/body weight). In contrast to our hypothesis, mean PYY3-36 concentrations (p=0.042), peak PYY3-36 concentrations (p=0.047), and PYY3-36 area under the curve (p=0.035) were lower in the High CR group compared to the Normal CR group after controlling for body mass index. No group differences were observed with respect to acylated ghrelin before or after the meal. In conclusion, PYY3-36 concentrations were suppressed in the women with High CR compared to the women with Normal CR. While the current study is cross-sectional and cause/effect of high dietary restraint and suppressed PYY3-36 concentrations cannot be determined, we speculate that these women with high cognitive restraint may be prone to weight gain or weight re-gain related to the suppressed circulating PYY after a meal. Further investigations need to explore the relationship between dietary cognitive restraint, circulating PYY, and weight gain.
AB - Acylated ghrelin and peptide YY (PYY3-36) are involved in appetite-regulation and energy homeostasis. These gastrointestinal hormones provide peripheral signals to the central nervous system to regulate appetite and short term food intake, and interact with leptin and insulin to regulate energy balance. Dietary restraint is an eating behavior phenotype that manifests as a conscious cognitive control of food intake in order to achieve or sustain a desired body weight. The purpose of the current study was to determine if college-aged women (18 to 25years) with different eating behavior phenotypes, i.e., high vs normal dietary restraint, differ with respect to circulating concentrations of gastrointestinal hormones during and following a test meal. We hypothesized that women with high dietary cognitive restraint [High CR (score≥13, n=13)] would have elevated active ghrelin and PYY3-36 concentrations after a test meal compared to women with normal dietary cognitive restraint [Normal CR (score<13, n=30)]. Gastrointestinal hormones were assessed before (-15 and 0min) and after (10, 15, 20, 30, 60, 90, 120 and 180min) the consumption of a mixed composition meal (5.0kcal per kg/body weight). In contrast to our hypothesis, mean PYY3-36 concentrations (p=0.042), peak PYY3-36 concentrations (p=0.047), and PYY3-36 area under the curve (p=0.035) were lower in the High CR group compared to the Normal CR group after controlling for body mass index. No group differences were observed with respect to acylated ghrelin before or after the meal. In conclusion, PYY3-36 concentrations were suppressed in the women with High CR compared to the women with Normal CR. While the current study is cross-sectional and cause/effect of high dietary restraint and suppressed PYY3-36 concentrations cannot be determined, we speculate that these women with high cognitive restraint may be prone to weight gain or weight re-gain related to the suppressed circulating PYY after a meal. Further investigations need to explore the relationship between dietary cognitive restraint, circulating PYY, and weight gain.
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U2 - 10.1016/j.physbeh.2013.06.025
DO - 10.1016/j.physbeh.2013.06.025
M3 - Article
C2 - 23831742
AN - SCOPUS:84880584928
SN - 0031-9384
VL - 120
SP - 26
EP - 33
JO - Physiology and Behavior
JF - Physiology and Behavior
ER -