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Effects of heat processing of corn and rice of faecal digestiblity of nutrients and adipose tissue fatty acid composition in young pigs
Research Areas
  • Animal production
Human and animal studies suggest a role for high glycemic index (GI) diet on feed intake mediated by endocrine signals. Ghrelin is a peptide with potent appetite-stimulating activity that might affect voluntary feed intake. In addition, ghrelin has the speci¿Oc characteristic of having an acylated group on one of its serine residues (Ser 3), which affects its activity. We have previously reported that type (rice vs. corn) and processing (raw vs. cooked) of the cereal of the diet increases GI in young pigs. This effect might partially explain the increases in feed intake observed when rice replaces corn in pig diets. The present study was designed to elucidate the effects of cereal type and heat processing of the cereal on dynamics of serum ghrelin after a short-term fasting and re-feeding trial. Weanling pigs (BW = 8.10 ¡Ó 1.2 kg, n=9 per treatment) were individually penned and fed their respective experimental diets based on milk products, ¿Osh meal, and 52% of corn or rice either raw or cooked. Pigs received their experimental diets for two weeks and then they were deprived of food for 12h (start of the experiment, 0h). Afterwards they were re-fed ad libitum for 3h and deprived again of food for 6 extra-hours. Blood was collected at 0h, 3h, 6h, and 9h of the experiment. Ghrelin levels were quanti¿Oed by RIA (Linco Research, St-Charles, MO). Ghrelin levels were not affected by dietary treatment (P>0.10), but were modi¿Oed (P<0.01) by time, with a maximum (532 pg/ml) at 6h of the experiment. Analysis of the acylated ghrelin levels will provide further insights on the implication of this hormone in the appetite stimulating effects of rice.
Joint ADAS-ASAS Annual meeting
Indianapolis, Estados Unidos
Start Date
End Date
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Journal of Animal Science
  • Autor: David Menoyo Luque (UPM)
  • Autor: Rosa Pilar Lazaro Garcia (UPM)
  • Autor: Gonzalo Gonzalez Mateos (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Producción Animal
  • Departamento: Producción Animal
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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