Influence of prolonged fasting in the dog on glucose turnover and blood metabolites

Brady, L.J.; Armstrong, M.K.; Muiruri, K.L.; Romsos, D.R.; Bergen, W.G.; Leveille, G.A.

Journal of Nutrition 107(6): 1053-1060

1977


ISSN/ISBN: 0022-3166
PMID: 864515
Document Number: 110702
Glucose turnover and blood metabolites were measured in 8 adult female beagles in the fed state and at 1, 7, 14 and 21 days of fasting. Glucose utilization decreased significantly from 1 to 7 days of fasting, but remained constant from 7 to 21 days, while blood ketones and plasma free fatty acids rose significantly during the same period. Plasma alanine, serine, and glycine fell with fasting, with the greatest decrease in alanine occurring between 7 to 14 days. Plasma branched chain amino acids rose significantly with fasting. The conclusion was that the shifts in plasma metabolites and decreased glucose utilization could be indicative of decreased energy demands of the fasting dogs or a shift in substrate utilization with progressive fasting.

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