Journal Article

Acetylsalicylic acid supplementation improves protein utilization efficiency while vitamin E supplementation reduces markers of the inflammatory response in weaned pigs challenged with enterotoxigenic E.coli

Jae Cheol Kim Bruce P. Mullan John L. Black Robert J. E. Hewitt Robert J. van Barneveld John R. Pluske

2017

Overview

Background： This experiment was conducted to test the hypothesis that vitamin E（Vit E） and acetylsalicylic acid（ASA）, a cyclooxygenase-2（COX-2） inhibitor, will additively reduce the production of the immunosuppressive molecule prostaglandin E_2（PGE_2） and hence reduce inflammatory responses in weaner pigs experimentally infected with an enterotoxigenic strain of E. coli.Methods： The experiment was conducted in a research facility with 192 individually-housed male weaner pigs（Landrace × Large White） weighing 6.6 ± 0.04 kg（mean ± SEM）. The pigs were experimentally infected with an enterotoxigenic strain of E. coli and were allocated to a 2 × 3 factorial design with the respective factors being without and with 125 ppm ASA and three levels of Vit E supplementation（50, 100 or 200 IU/kg diet, dl-α-tocopheryl acetate）.Results： Acetylsalicylic acid supplementation improved average daily gain（P 〈 0.05） and tended to improve feed：gain ratio（P 〈 0.10） during the first 14 d after weaning. Acetylsalicylic acid supplementation also improved（P 〈 0.001） amino acid utilization efficiency（as assessed by plasma urea level） and tended to decrease（P 〈 0.10） PGE2 production in the liver without affecting smal intestinal histology and tight junction protein mR NA expression in the jejunal epithelium. Vitamin E supplementation greater than 100 IU/kg diet sustained both the plasma Vit E concentration（P 〈 0.001） and plasma haptoglobin content（P 〈 0.001） after weaning. However, there was no additive effects of the combined supplementation of ASA and Vit E on performance, intestinal barrier function and inflammatory responses of weaned pigs.Conclusions： Although ASA and vitamin E improved amino acid utilization efficiency and reduced acute inflammatory responses, ASA and vitamin E did not additively reduce production of PGE2 and inflammatory responses in weaner pigs experimental y infected with an enterotoxigenic strain of E. coli.

• Publisher: AB Vista Asia Pte.Ltd., Balestier Road, The Mezzo, 329682 Singapore,Singapore%Department of Agriculture and Food, Pork Innovation, South Perth, WA 6151, Australia%John L Black Consulting, Warrimoo, NSW 2774, Australia%SunPork Farms Solutions, Loganholme, QLD 4129, Australia%Barneveld Nutrition Pry Ltd, Loganholme, QLD 4129, Australia%School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA 6150, Australia,School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA 6150, Australia