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• W2114409577 abstract "El péptido YY (PYY) tiene 36 aminoácidos y lo sintetizan fundamentalmente las células L del intestino. El PYY aumenta tras las comidas y alcanza su nadir tras el ayuno. Tras la ingestión se liberan dos formas: PYY1-36 y PYY3-36. Se ha demostrado que el PYY3-36 reduce la ingesta en humanos y roedores. Hay poca información sobre los valores plasmáticos de PYY, especialmente de PYY3-36, en respuesta a la ingestión y su relación con la respuesta de ghrelina. Estudiar la respuesta secretora de PYY1-36 y PYY3-36 en sujetos normales tras ingerir una comida mixta y su relación con la secreción de ghrelina total y acilada. Estudiamos a 8 sujetos sanos, 4 mujeres y 4 varones, con una mediana de edad de 53 (intervalo, 36-59) años. Tras el ayuno nocturno, recibieron en 2 días diferentes y de forma aleatoria: una comida oral mixta estándar, que consistía en 400 ml de Isosource Energy (159 kcal/100 ml) o placebo por vía oral (400 ml de agua). Se obtuvieron muestras sanguíneas en los tiempos 0, 30, 45, 60 y 120 min para la determinación de PYY1-36, PYY3-36, ghrelina total y ghrelina acilada. Las comparaciones se realizaron mediante la prueba de Wilcoxon. Las correlaciones numéricas se analizaron mediante la prueba de correlación de Spearman. Se consideró significativo un valor de p ≤ 0,05. Tras ingerir la comida, se produce un máximo de PYY1-36 (mediana [intervalo]) de 141,5 (81-198) pg/ml y no hay respuesta tras placebo, con un máximo de 92,5 (46-219) pg/ml (p = 0,04). Los valores del área bajo la curva (ABC) de PYY1-36 tras la ingesta fueron 14.865 (8.032-19.822) pg/ml/min y tras placebo, 8.992 (4.455- 21.382) pg/ml/min (p = 0,06). Tras ingerir la comida se produce un máximo de PYY3-36 de 92,5 (59-135) pg/ml y no hay respuesta tras placebo, con un máximo de 46,5 (30- 66) pg/ml (p = 0,02). Los valores del ABC de PYY3-36 tras la ingesta fueron 9.086 (6.412-14.970) pg/ml/min y tras placebo, 4.984 (3.142-6.772) pg/ml/min (p = 0,012). El cociente nadir de ghrelina total/máximo de PYY1-36 disminuye de forma marcada tras la ingestión; los valores preprandiales son 7,44 (3,64-14,56) y los posprandiales, 3,55 (1,64-7,16) (p = 0,03), mientras que no se modifica tras placebo. El cociente nadir de ghrelina acilada/máximo de PYY3-36 disminuye de forma marcada tras la ingestión, y los valores preprandiales son 2,03 (0,92-3) y los posprandiales, 0,73 (0,26-1,27) (p = 0,02), mientras que no se modifican tras placebo. En sujetos normales, PYY1-36 y PYY3-36 aumentan de forma paralela tras ingerir una comida mixta; simultáneamente, los valores de ghrelina total y acilada disminuyen. El cociente entre el nadir de ghrelina acilada y el máximo de PYY3-36 disminuye tras ingerir una comida mixta. Este conjunto de datos indica su posible participación en la regulación aguda del apetito tras la comida. Peptide YY (PYY) is a 36 amino acid peptide synthesized mostly by intestinal L cells. This peptide reaches its nadir during fasting and increases immediately after meals. After food intake, two molecular forms are released, PYY1-36 and PYY3-36. PYY3-36 reduces food intake in both humans and rodents. There is scarce information about plasmatic concentrations of PYY, especially of PYY3-36, after food ingestion, and their relationship to ghrelin. To study PYY1-36 and PYY3-36 secretory response after a mixed meal, and its relationship to total and acylated ghrelin secretion in healthy subjects. We studied eight healthy subjects, 4 women and 4 men, with a median age of 53 (range, 36-59) years. After an overnight fast, the subjects received either a mixed standard meal (400 ml Isosource Energy® [159 kcal/100 ml]) or placebo (400 ml of water) orally in random order on two different days. Blood samples were obtained at 0, 30, 45, 60 and 120 min for measurement of PYY1-36, PYY3-36, total ghrelin and acylated ghrelin. Comparisons were made by Wilcoxon's test. Numerical correlations were performed using Spearman's test. P-values ≤ 0.05 were considered significant. After a mixed meal, PYY1-36 reached a peak of (median [range]) 141.5 (81-198) pg/ml. There was no response to placebo, with a peak of 92.5 (46-219) pg/ml (p = 0.04). The area under the curve (AUC) of PYY1-36 levels after a mixed meal were 14,865 (8,032-19,822) pg/ml/min and after placebo were 8,992 (4,455-21,382) pg/ml/min (p = 0.06). After ingestion of a mixed meal, PYY3-36 reached a peak of 92.5 (59-135) pg/ml, with no response to placebo (46.5 [30-66] pg/ml) (p = 0.02). The AUC of PYY3-36 levels after a mixed meal were 9,086 (6,412-14,970) pg/ml/min, and after placebo were 4,984 (3,142-6,772) pg/ml/min (p = 0.012). The quotient between nadir total ghrelin/peak PYY1-36 was markedly diminished after food ingestion, with preprandial values of 7.44 (3.64-14.56) and postprandial values of 3.55 (1.64-7.16) (p = 0.03). The former quotient was unmodified by placebo. The quotient between nadir acylated ghrelin/peak PYY3-36 was markedly diminished after ingestion of a mixed meal, with preprandial values of 2.03 (0.92-3) and postprandial values of 0.73 (0.26-1.27) (p = 0.02). This quotient was unmodified by placebo. In healthy subjects, blood levels of both PYY1-36 and PYY3-36 increase after ingestion of a mixed meal. Simultaneously, total and acylated ghrelin levels diminish. The quotient between nadir acylated ghrelin/peak PYY3-36 diminishes after a mixed meal. All these data suggest the possible contribution of these peptides to appetite regulation after ingestion." @default.
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• W2114409577 date "2008-10-01" @default.
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• W2114409577 title "Respuesta secretora de PYY1-36 y PYY3-36 en sujetos normales tras la ingesta de una comida mixta" @default.
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• W2114409577 doi "https://doi.org/10.1016/s1575-0922(08)72793-1" @default.
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