Insulinoma in a 5‐Year‐Old Dexter Cow

Binici, Cagri; Plog, Stephanie; Kershaw, Olivia; Schmicke, Marion; Kolk, Johannes H. van der; Müller, Kerstin

doi:10.1111/jvim.13953

Cited by 2 publications

(1 citation statement)

References 17 publications

(44 reference statements)

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“…Monitoring glucose and insulin responses through an intravenous glucose tolerance test (ivGTT) is a valuable procedure to diagnose conditions affecting carbohydrate metabolism in domestic cattle (Opsomer et al, 1999;Binici et al, 2016). The ivGTT allows the quantification of blood glucose and insulin concentrations at specific time points once a glucose dose is administered intravenously.…”

Section: Short Communicationmentioning

confidence: 99%

Short communication: Repeatability of intravenous glucose tolerance test traits in young Holstein-Friesian cattle

González-Grajales

Pieper

Görner

et al. 2019

Journal of Dairy Science

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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.

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Section: Short Communicationmentioning

confidence: 99%