title: Thermal conditions influence changes in body temperature induced by intragastric administration of capsaicin in mice.
abstract: Capsaicin has been reported to have unique thermoregulatory actions. However, changes in core temperature after the administration of capsaicin are a controversial point. Therefore, we investigated the effects of environmental thermal conditions on changes in body temperature caused by capsaicin in mice. We showed that intragastric administration of 10 and 15 mg/kg capsaicin increased tail temperature and decreased colonic temperatures in the core temperature (CT)-constant and CT-decreasing conditions. In the CT-increasing condition, 15 mg/kg capsaicin increased tail temperature and decreased colonic temperature. However, 10 mg/kg capsaicin increased colonic temperature. Furthermore, the amount of increase in tail temperature was greater in the CT-decreasing condition and lower in the CT-increasing condition, compared with that of the CT-constant condition. These findings suggest that the changes in core temperature were affected by the environmental thermal conditions and that preliminary thermoregulation state might be more important than the constancy of temperature to evaluate the effects of heat diffusion and thermogensis.
authors.affiliation: a Department of Nutrition , School of Human Culture, The University of Shiga Prefecture , Hikone , Shiga , Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Mori
authors.affiliation: a Department of Nutrition , School of Human Culture, The University of Shiga Prefecture , Hikone , Shiga , Japan.
authors.forename: Tomomi
authors.initials: T
authors.lastname: Urata
authors.affiliation: a Department of Nutrition , School of Human Culture, The University of Shiga Prefecture , Hikone , Shiga , Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Fukuwatari
mesh_terms: D000818:Animals; D001831:Body Temperature / Q000187:drug effects* / Q000502:physiology; D001833:Body Temperature Regulation / Q000502:physiology*; D002211:Capsaicin / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D010288:Parenteral Nutrition
chemical_list: D002211:Capsaicin
keywords: capsaicin; core temperature; mice; thermal condition; thermoregulation