Objectives: Aim of the study was to investigate the effects of full ripe acorns from Q. pubescens consumption on stomach mucosa in growing pigs and consequent physiologic adaptation/pathologies raise, in relation to acorns tannins ingestion. Material and methods: A total of 8 growing pigs were divided into 2 experimental groups (each n = 4): the control group was fed a conventional complete diet for pigs (pelleted; 890 g DM/kg; based on cereals and soybean meal). The acorn-fed group was offered a combined, 70 % of ripe whole acorns shred ration (612 g DM/kg of fresh matter, 0.516 g TAE/kg DM) and 30 % of the complete diet. All animals were sacrificed 8 days after, 8 hours after the meal offer. At anatomic dissection, stomachs were removed and contents processed for DM, crude protein, total proline content and pH. Stomach’s mucosa was macroscopically inspected and scored for eventual injuries of the non glandular area. Microscopic examinations of the tissue were carried out to detect structural modifications. Results: A markedly darker stained gastric mucosa was observed in animals fed the acorns based diet in the glandular region. No signs of injuries were seen. A coating effect was evaluated by auto-fluorescence by polyphenols presence bound to the secreting mucosa of stomachs in pigs fed acorns. Proline flux rate from feed ingestion to stomach content showed a negative disappearance (-43.2±11.3%) in the total of pigs fed acorns tannins at a comparison to pigs fed the complete diet (39.5±30.1%). Conclusions: Further investigations on the role of proline secretion after acorns consumption and composition of the protective film secreted from the glandular mucosa in the stomach of pigs (mucin composed of high serine, threonin and proline aminoacids content) leading to the coating effect due to tannins ingestion are needed.
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|Titolo:||Effect of a high tannins combined diet based on ripe Downy Oak (Quercus pubescens) shred acorns on stomach health in pigs|
|Data di pubblicazione:||2010|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|