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A note on plasma cholecystokinin concentration in dairy cows

Published online by Cambridge University Press:  02 September 2010

M. Furuse
Affiliation:
Laboratory of Animal Nutrition, School of Agriculture, Nagoya University, Nagoya 464-01, Japan
S. I. Yang
Affiliation:
Laboratory of Animal Nutrition, School of Agriculture, Nagoya University, Nagoya 464-01, Japan
Y. H. Choi
Affiliation:
Laboratory of Animal Nutrition, School of Agriculture, Nagoya University, Nagoya 464-01, Japan
N. Kawamura
Affiliation:
Aichi-ken Agricultural Research Centre, Nagakute, Aichi 480-11, Japan
A. Takahashi
Affiliation:
Aichi-ken Agricultural Research Centre, Nagakute, Aichi 480-11, Japan
J. Okumura
Affiliation:
Laboratory of Animal Nutrition, School of Agriculture, Nagoya University, Nagoya 464-01, Japan
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Abstract

Changes in plasma cholecystokinin (CCK) levels after feeding were investigated in dairy cows. Three HolsteinFriesian lactating cows given concentrates at 06.00 and 13.00 h and hay at 16.30 h were used. Blood samples were taken from the jugular vein from 0 (before feeding, 13.00 h) to 6 h at 1-h intervals. The immunoreactivity of CCK was expressed in terms of the CCK-8 equivalent. The plasma concentration of CCK was not changed over the experimental period. This result might be reflected by the continuous flow of digesta from the rumen.

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Type
Research Article
Copyright
Copyright © British Society of Animal Science 1991

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