Publikationsdatenbank

Short Communication: Repeatability of intravenous glucose tolerance test traits in young Holstein Friesian cattle (2019)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

González-Grajales, L Antonio (WE 18)

Pieper, L. (WE 18)

Görner, S (WE 18)

Görner, P (WE 18)

Staufenbiel, R. (WE 18)

Quelle

Journal of dairy science : JDS

Bandzählung: 102

Heftzählung: 4

Seiten: 3609 – 3614

ISSN: 0022-0302

Sprache

Englisch

Verweise

URL (Volltext): https://www.sciencedirect.com/science/article/pii/S0022030219301018?via%3Dihub

DOI: 10.3168/jds.2018-15617

Pubmed: 30712940

Kontakt

Nutztierklinik

Königsweg 65
14163 Berlin
+49 30 838 62261
klauentierklinik@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Few studies have compared individual variability of an intravenous glucose tolerance test (ivGTT) obtained daily in young cattle. The objective of this study was to evaluate the repeatability of glucose traits and insulin responses derived from ivGTT during 3 consecutive days in Holstein-Friesian cattle (bulls: n = 4, steers: n = 3, heifers: n = 3). Blood collections were performed from min 0 (basal concentrations) to min 63 (last measurement). Additional estimates included maximal concentration for glucose and insulin, glucose half-life time (GHLT), and glucose and insulin area under the curve. Glucose traits showed higher repeatability when compared with insulin responses. On average, the glucose trait and insulin response with the lowest coefficient of variation was GHLT (0.7%) and insulin area under the curve (21.3%), respectively. In addition, a general linear model with repeated measures was used to test for significant differences in glucose and insulin concentrations over time at different trial days. Both glucose and insulin concentrations were influenced by time point but not by trial day or time point × trial day. The results from this study showed that individual insulin responses were more variable than glucose traits. The high repeatability of GHLT evidenced the strict regulatory glucose disposal mechanisms occurring in young Holstein-Friesian cattle, whereas insulin responses showed high variability despite controlled management and nutritional practices.