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• W2032203155 abstract "Peptide YY (PYY) and ghrelin exhibit a reciprocal association and antagonistic physiological effects in the peripheral circulation. Research has yet to clarify the effect of weight loss on the 24 h profile of PYY or its association to 24 h ghrelin. We sought to determine if diet- and exercise-induced weight loss affects the 24 h profile of PYY and its association with 24 h ghrelin in normal weight, premenopausal women. Participants (n = 13) were assessed at baseline (BL) and after a 3-month diet and exercise intervention (post). Blood samples obtained q10 min for 24 h were assayed for total PYY and total ghrelin q60 min from 0800 to 1000 h and 2000 to 0800 h and q20 min from 1000 to 2000 h. The ghrelin/PYY ratio was used as an index of hormonal exposure. Statistical analyses included paired t-tests and linear mixed effects modeling. Body weight (−1.85 ± 0.67 kg; p = 0.02), and body fat (−2.53 ± 0.83%; p = 0.01) decreased from BL to post. Ghrelin AUC (5252 ± 2177 pg/ml/24 h; p = 0.03), 24 h mean (216 ± 90 pg/ml; p = 0.03) and peak (300 ± 134 pg/ml; p = 0.047) increased from BL to post. No change occurred in PYY AUC (88.2 ± 163.7 pg/ml; p = 0.60), 24 h mean (4.8 ± 6.9 pg/ml; p = 0.50) or peak (3.6 ± 6.4 pg/ml; p = 0.58). The 24 h association between PYY and ghrelin at baseline (p = 0.04) was weakened at post (p = 0.14); however, the ghrelin/PYY lunch ratio increased (p = 0.01) indicating the potential for ghrelin predominance over PYY in the circulation. PYY and ghrelin are reciprocally associated during a period of weight stability, but not following weight loss. An “uncoupling” may have occurred, particularly at lunch, due to factors that modulate ghrelin in response to weight loss." @default.
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• W2032203155 date "2013-11-01" @default.
• W2032203155 modified "2023-10-17" @default.
• W2032203155 title "The impact of weight loss on the 24-h profile of circulating peptide YY and its association with 24-h ghrelin in normal weight premenopausal women" @default.
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• W2032203155 doi "https://doi.org/10.1016/j.peptides.2013.08.018" @default.
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