Autonomic and behavioural thermoregulation in starved rats
| العنوان: | Autonomic and behavioural thermoregulation in starved rats |
|---|---|
| المؤلفون: | Kazuyuki Kanosue, Naotoshi Sugimoto, Sotaro Sakurada, Osamu Shido, Yasuhiro Hiratsuka, Tamae Yoda |
| المصدر: | The Journal of Physiology. 526:417-424 |
| بيانات النشر: | Wiley, 2000. |
| سنة النشر: | 2000 |
| مصطلحات موضوعية: | Male, Food deprivation, medicine.medical_specialty, Physiology, Hypothermia, Biology, Autonomic Nervous System, Skin vasodilatation, Internal medicine, medicine, Animals, Rats, Wistar, Starvation, Temperature, Heat losses, Original Articles, Circadian Rhythm, Rats, Behavioural thermoregulation, Endocrinology, medicine.symptom, Food Deprivation, Thermogenesis, Body Temperature Regulation |
| الوصف: | We investigated the mechanism of starvation-induced hypothermia in rats. Threshold core temperatures (Tcor) for tail skin vasodilatation and cold-induced thermogenesis were determined after a 3 day starvation using a chronically implanted intravenous thermode. Food deprivation significantly lowered the threshold Tcor for heat production, but did not affect the heat loss threshold. Thermogenic response to a fall in Tcor below its threshold was enhanced by starvation. Preferred ambient temperatures (Tpref) and Tcor were measured before and during a 3 day starvation in a thermal gradient. The 3 day starvation significantly lowered Tcor only in the light phase of the day. The level of hypothermia was the same throughout the fasting period, while Tpref gradually increased during the 3 days of starvation. When rats were starved at a constant ambient temperature of 25°C (no thermal gradient), their Tcor levels were comparable with those of the rats kept in the thermal gradient. The results suggest that, in rats, hypothermia caused by starvation was not due to a decrement in thermogenic capability, but was due to a decrease in the threshold for the activation of thermogenesis. |
| تدمد: | 1469-7793 0022-3751 |
| DOI: | 10.1111/j.1469-7793.2000.00417.x |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5d3d5721478aba817ee1a0c44245e75 https://doi.org/10.1111/j.1469-7793.2000.00417.x |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c5d3d5721478aba817ee1a0c44245e75 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14697793 00223751 |
|---|---|
| DOI: | 10.1111/j.1469-7793.2000.00417.x |