Capsiate, a nonpungent capsaicin analog, increases endurance swimming capacity of mice by stimulation of vanilloid receptors.
We investigated the effect of capsiate, a nonpungent natural capsaicin analog, on the swimming capacity of mice in an adjustable-current water pool. Male BALB/c mice orally given capsiate (10 mg/kg) were able to keep swimming longer before exhaustion than the control mice. After 30 min of swimming, the residual glycogen in the gastrocnemius muscle was higher, the serum free fatty acid concentration tended to be higher, and the serum lactic acid concentration was significantly lower in the capsiate-administered mice. The value for the respiratory exchange ratio of the capsiate group was significantly lower during both resting and treadmill running. These physiological differences were abolished by administering the vanilloid receptor antagonist, capsazepin (0.17 mmol/kg, i.p.). The mice were not averse to the capsiate solution during a 4-h two-bottle choice test. These results suggest that the oral administration of capsiate enhanced fat oxidation and spared carbohydrate utilization, and consequently increased the endurance swimming capacity of the mice via stimulation of their vanilloid receptors. Practical application of capsiate is expected.
Haramizu
Satoshi
S
Laboratory of Nutrition Chemistry, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan.
Mizunoya
Wataru
W
Masuda
Yoriko
Y
Ohnuki
Koichiro
K
Watanabe
Tatsuo
T
Yazawa
Susumu
S
Fushiki
Tohru
T
D000818:Animals; D002211:Capsaicin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D006003:Glycogen / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D010100:Oxygen / Q000378:metabolism; D010807:Physical Endurance / Q000187:drug effects*; D012119:Respiration / Q000187:drug effects; D013550:Swimming; D050916:TRPV Cation Channels / Q000819:agonists* / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013997:Time Factors
D050916:TRPV Cation Channels; D006003:Glycogen; C470213:capsiate; D002211:Capsaicin; D010100:Oxygen