PSII-17 Glucose and insulin response to feed processing method and meal time of day in horses

Autor: K Ely, J Flenniken, Pat Harris, K. Kaufman, N. Liburt, B. McIntosh, A. Krotky
Rok vydání: 2018
Předmět:
Zdroj: Journal of Animal Science. 96:73-73
ISSN: 1525-3163
0021-8812
DOI: 10.1093/jas/sky404.161
Popis: This study aimed to evaluate the effects of processing method and meal time of day on certain metabolic responses in horses. Both factors influence postprandial glycemic and insulinemic response, but any interaction is unknown. Nine thoroughbred geldings (9.9 ± 2.2 yrs) were used in a randomized 3x3 crossover design. Treatments consisted of three diets: hay only (control), hay plus the same compound feed either pelleted (P), or extruded (E). Horses were fed a daily total dry matter intake (DMI) of 2.5% BW (P and E diets were offered at 0.75% BW, with hay at 1.75% BW), evenly split into two meals and given at 0800 (AM) and 1600 (PM) h daily. Horses were gradually adapted to their respective diets over the first 7 d of each 25 d period. Blood samples were collected (via intravenous jugular catheters) 30 and 0 min pre- and 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 180, 210, and 240 min post-prandially both AM and PM on d 25, and plasma analyzed for glucose and insulin concentrations. Areas under the curve (AUC) were determined and evaluated using two-tailed paired t-tests (GraphPad Prism6) with statistical significance set at P ≤ 0.05. Horses fed P and E had increased AM AUC compared to PM for both glucose (P = 0.0005 and P = 0.0037; respectively) and insulin (P = 0.0042 and P = 0.0419; respectively). There were no differences in AM AUC between the two diets. However, there was a trend for increased PM AUC for glucose and insulin when diet E was fed compared to P (P = 0.08 and P = 0.09; respectively). Processing method did not alter metabolic response in horses during the AM meal but may influence PM response. Further research is needed to explain these differences.
Databáze: OpenAIRE
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