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Circadian variations in salivary chromogranin a concentrations during a 24-hour period in dogs
Kazutaka Kanai,Mariko Hino,Yasutomo Hori,Ruriko Nakao,Fumio Hoshi,Naoyuki Itoh,Seiichi Higuchi 대한수의학회 2008 Journal of Veterinary Science Vol.9 No.4
The purpose of this study was to determine if salivary chromogranin a secretion in dogs exhibits a circadian rhythm. Saliva sampling was performed during three different sessions occurring in three nonconsecutive 24-h periods. Sixteen healthy adult beagle dogs (8 males and 8 females) were moved to a sampling room and housed individually in cages. Saliva samples were obtained every 4 h from 12:00 p.m. to 12:00 p.m. the following day. In the interest of habituation, saliva was obtained hourly from each dog 3 h before the experiment was started. Salivary chromogranin A concentrations were measured using an enzyme-linked immunosorbent assay. No circadian rhythm was detected for salivary chromogranin A secretion, and no differences in salivary chromogranin A concentrations measured every 4 h were demonstrated during the 24-h cycle in dogs.