Yeast cell wall supplementation alters the metabolic responses of crossbred heifers to an endotoxin challenge. Issue 1 (February 2014)

• Record Type: Journal Article
• Authors: Sanchez, Nicole C Burdick; Young, Tanner R; Carroll, Jeffery A; Corley, Jimmie R; Rathmann, Ryan J; Johnson, Bradley J
• Is Part Of: Innate immunity. Volume 20:Issue 1(2014:Feb.)
• Page Start: 104
• Page End: 112
• Publication Date: 2014-02
• Subjects: Cattle -- feedlot -- LPS -- metabolism -- yeast cell wall; Natural immunity -- Periodicals; Endotoxins -- Periodicals; 616.07905
• DOI: 10.1177/1753425913482152
• Languages: English
• ISSNs: 1753-4259

Abstract

This study examined the effect of feeding yeast cell wall (YCW) products on the metabolic responses of newly-received feedlot cattle to an endotoxin challenge. Heifers were separated into treatment groups receiving either a Control diet, YCW-A or YCW-C, and were fed for 52 d. Heifers were weighed on d 0, 14, 36, 38 and 52. On d 37 heifers were challenged i.v. with LPS [0.5 µg/kg body weight (BW)] and blood samples were collected relative to LPS challenge. Heifer BW increased from d 0 to 36 and from d 38 to 52, but was not affected by treatment. Post-LPS, glucose concentrations increased and were less in YCW-A than Control and YCW-C heifers. Pre-LPS, insulin concentrations were greater in YCW-A and YCW-C than Control heifers. Post-LPS, insulin concentrations increased with YCW-C having greater insulin than Control heifers. Pre-LPS, NEFA concentrations tended to be less in YCW-C than Control heifers. Post-LPS non-esterified fatty acids (NEFA) concentrations were less in YCW-C than Control and YCW-A heifers. Post-LPS, blood urea nitrogen (BUN) concentrations were greater in YCW-A than Control and YCW-C. These data indicate, based on NEFA and BUN data, that certain YCW products can enhance energy metabolism during an immune challenge without causing lipolysis or muscle catabolism.