Biomaterial Database

Suppression of brown adipose tissue metabolism following intraventricular bombesin in rats. 1987

O Shido, and Y Noda, and T Nagasaka

Department of Physiology, School of Medicine, Kanazawa University, Japan.

The effects of intraventricular bombesin (BS) at doses of 0.1, 1.0, and 10.0 micrograms on thermoregulatory and cardiovascular functions were studied in conscious rats with a direct calorimeter at ambient temperatures (Ta) of 18, 23, and 28 degrees C. At two lower TaS, the central BS produced a profound decrease in colonic temperature (Tcol) with a reduction of the temperature difference between the interscapular brown adipose tissue (BAT) and the colon (TBAT-Tcol). Increases in nonevaporative and evaporative heat losses and mean arterial blood pressure (BP) were consistent following the central BS at any dose tested at any Ta. In the sinoaortic deafferentated rats, a 0.1 microgram of BS produced hypothermia with a significant decrease in (TBAT-Tcol) and heat production (M). Changes in Tcol, (TBAT-Tcol), and M in the denervated rats, however, were not different from those in the sham-operated rats. These results suggest that the central BS suppresses BAT thermogenesis and facilitates heat loss mechanisms. The baroreflex-mediated metabolic reduction is not the case in the BS-induced hypothermia in rats.

UI	MeSH Term	Description	Entries
D007035	Hypothermia	Lower than normal body temperature, especially in warm-blooded animals.	Hypothermia, Accidental,Accidental Hypothermia,Accidental Hypothermias,Hypothermias,Hypothermias, Accidental
D007276	Injections, Intraventricular	Injections into the cerebral ventricles.	Intraventricular Injections,Injection, Intraventricular,Intraventricular Injection
D008297	Male		Males
D011311	Pressoreceptors	Receptors in the vascular system, particularly the aorta and carotid sinus, which are sensitive to stretch of the vessel walls.	Baroreceptors,Receptors, Stretch, Arterial,Receptors, Stretch, Vascular,Stretch Receptors, Arterial,Stretch Receptors, Vascular,Arterial Stretch Receptor,Arterial Stretch Receptors,Baroreceptor,Pressoreceptor,Receptor, Arterial Stretch,Receptor, Vascular Stretch,Receptors, Arterial Stretch,Receptors, Vascular Stretch,Stretch Receptor, Arterial,Stretch Receptor, Vascular,Vascular Stretch Receptor,Vascular Stretch Receptors
D011919	Rats, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.	August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D001833	Body Temperature Regulation	The processes of heating and cooling that an organism uses to control its temperature.	Heat Loss,Thermoregulation,Regulation, Body Temperature,Temperature Regulation, Body,Body Temperature Regulations,Heat Losses,Loss, Heat,Losses, Heat,Regulations, Body Temperature,Temperature Regulations, Body,Thermoregulations
D001839	Bombesin	A tetradecapeptide originally obtained from the skins of toads Bombina bombina and B. variegata. It is also an endogenous neurotransmitter in many animals including mammals. Bombesin affects vascular and other smooth muscle, gastric secretion, and renal circulation and function.	Bombesin 14,Bombesin Dihydrochloride,Dihydrochloride, Bombesin
D002001	Adipose Tissue, Brown	A thermogenic form of adipose tissue composed of BROWN ADIPOCYTES. It is found in newborns of many species including humans, and in hibernating mammals. Brown fat is richly vascularized, innervated, and densely packed with MITOCHONDRIA which can generate heat directly from the stored lipids.	Brown Fat,Hibernating Gland,Brown Adipose Tissue,Fat, Brown,Tissue, Brown Adipose
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus