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Abstract
Metabolic balance studies were undertaken during a 12-day fasting period in 6 mongrel
and 4 Dalmatian dogs. No evidence of ketosis could be demonstrated during this period.
Plasma bicarbonate concentration remained normal. Mean urinary ammonia and titratable
acid fell markedly so that net acid excretion dropped from 59 to 23 mEq./day. Mean
total urinary nitrogen excretion decreased from 7.2 to 3.3 Gm./day during starvation.
A modest rise in urinary pH (0.18 unit) was observed during fasting. No change in
urinary or plasma uric acid values could be demonstrated in either mongrel or Dalmatian
dogs. Serum phospholipids, cholesterol and triglycerides were not modified during
starvation while nonesterified fatty acids rose from 740 to 1000 μEq./L. These data
contrast markedly with those observed in human subjects who develop ketosis, increased
urinary ammonia and decreased uric acid excretion during fasting. Canine resistance
to ketosis during starvation could be related to more efficient utilization of mobilized
lipids.
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Article info
Publication history
Received:
August 18,
1967
Footnotes
☆This work was supported by grants from the Medical Research Council of Canada, the Department of National Health and Welfare, and the Canadian Arthritis and Rheumatism Society.
☆☆This work was done in partial fulfillment of the requirements for a Ph.D. degree in Investigative Medicine.
Identification
Copyright
© 1968 Published by Elsevier Inc.