Chromium propionate in broilers: effect on insulin sensitivity

The objective of this study was to evaluate the effects of dietary chromium (Cr), as chromium propionate, on measures of insulin sensitivity. Liver and muscle glycogen, and plasma glucose and non-esterified fatty acid (NEFA) concentrations were used as indicators of insulin sensitivity. In total, 28...

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Bibliographic Details
Published in:Poultry science 2016-05, Vol.95 (5), p.1096-1104
Main Authors: Brooks, M. A., Grimes, J. L., Lloyd, K. E., Krafka, K., Lamptey, A., Spears, J. W.
Format: Article
Language:English
Subjects:
Animals
Blood Glucose - drug effects
Chickens
Fatty Acids, Nonesterified - blood
Glycogen - metabolism
Insulin Resistance
Liver - metabolism
Male
Muscle, Skeletal - metabolism
Propionates - pharmacology
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Summary:The objective of this study was to evaluate the effects of dietary chromium (Cr), as chromium propionate, on measures of insulin sensitivity. Liver and muscle glycogen, and plasma glucose and non-esterified fatty acid (NEFA) concentrations were used as indicators of insulin sensitivity. In total, 288 newly hatched male Ross broilers were divided into 4 dietary treatments consisting of 0 (control diet analyzed 0.43 to 0.45 mg Cr/kg), 0.2, 0.4, or 0.6 mg supplemental Cr/kg diet, resulting in 4 treatments with 9 replicate pens per treatment containing eight birds per pen. At d 21, 2 birds per cage were removed based on the greatest deviation from pen mean BW, resulting in each pen containing 6 birds for the final analyses. Final BW were taken on d 40, and on d 42 two birds from each pen were sampled for plasma NEFA, glucose, and muscle and liver glycogen determination at the initiation and termination of a 22 h fast. The remaining 2 fasted birds were sampled after a 30 min refeeding period. No differences were observed in feed intake, BW gain, or feed efficiency on d 21 or d 40. Liver glycogen tended (P = 0.10) to be greater in Cr-supplemented chicks in the fed state, and muscle glycogen concentrations tended (P = 0.07) to be greater in Cr-supplemented chicks compared with controls following fasting and refeeding. Plasma glucose concentrations were not affected by dietary Cr in the fed, fasted, or refed state. Plasma NEFA levels were not affected by treatment in fed or fasted birds. However, plasma NEFA concentrations were lower (P
ISSN:0032-5791
1525-3171
DOI:10.3382/ps/pew018