@article{MAKHILLJAVA20141324181,
title = {Effects of Creatine Monohydrate Supplementation on Glucose Homeostasis in Skeletal Muscle of Broilers},
journal = {Journal of Animal and Veterinary Advances},
volume = {13},
number = {2},
pages = {89-97},
year = {2014},
issn = {1680-5593},
doi = {javaa.2014.89.97},
url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2014.89.97},
author = {D.Y.,J.J.,W.G.,J.H.,A.Y.,L. and},
keywords = {Creatine,broiler,glucose uptake,oxidation,glycogen synthesis},
abstract = {The object of the study was to investigate the effects of
Creatine Monohydrate (CMH) supplementation on glucose absorption, glucose oxidation
and glycogen synthesis in skeletal muscle of broilers. Nine hundred, 42 days
old broilers were randomly assigned to four treatments with five replicates
per treatment and 45 birds per replicate. The birds received either a no-CMH
diet (0 mg kg-1), a low (250 mg kg-1), a moderate (500
mg kg-1) or a high-CMH diet (1000 mg kg-1) for 21 days.
The results showed that CMH supplementation did not affect serum glucose concentration
but did increase lactate concentration (linear and quadratic, p<0.001) as
CMH supplementation increased. The concentration of lactate in pectoralis major
showed a quadratic effect (p = 0.036) in response to increasing CMH supplementation.
For the thigh muscle, the concentration of lactate presented a decreasing effect
(linear, p = 0.042). Pyruvic acid in the pectoralis major increased markedly
(linear, p<0.004; quadratic, p<0.003) with increasing CMH comcentration
but an opposite effect to that in the thigh muscle. The HK1 mRNA abundance in
the pectoralis major was decreased by CMH supplementation (linear and quadratic,
p<0.001) but the HK1 mRNA abundance in the thigh muscle was increased with
a quadratic effect. CMH supplementation had increased Lactate Dehydrogenase
(LDH) activity in pectoralis major (linear, p = 0.003; quadratic, p<0.001)
while no significant effect on thigh muscle as CMH concentration increased.
Thus, it was inferred that CMH supplementation may improve glucose oxidation
with distribution difference in skeletal muscle. Additionally, CMH supplementation
had no effect on the Glycogen Synthase (GYS), Glucose Transporter 1 (GLUT1)
and Glucose Transporter 3 (GLUT3) mRNA abundance, macroglycogen or total glycogen
concentration of the breast and thigh muscles. CMH supplementation significantly
increased the AMPKα phosphorylation of the pectoralis major and demonstrated
a quadratic effect (p = 0.002) as CMH supplementation increased. CMH supplement
did not affect the AMPKα phosphorylation of the thigh muscle but presented
the same effect as the pectoralis major. The results suggested that CMH supplementation
did not affect glucose uptake and glycogen storage of skeletal muscle but it
accelerate the glucose oxidation in the thigh muscle or decelerate glycolysis
in the pectoralis major, possibly regulated by AMPKα phosphorylation.}
}