Accession Number : AD0287074

Title :   EFFECT OF RESERPINE ON BODY TEMPERATURE REGULATION OF THE RAT

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : TAYLOR,ROBERT E. JR. ; FREGLY,MELVIN J.

Report Date : FEB 1962

Pagination or Media Count : 1

Abstract : Daily intraperitoneal injections of reserpine were found to lower the colonic temperature of rats maintained at room temperature (25 C.) only if the dose was 1.0 mg./kg. or greater. Much smaller doses (0.125 mg./kg.) of the drug significantly increased the rate at which these animals cooled when exposed to reduced environmental temperatures (5 and 14 C.). Metabolic studies indicated that decreased heat production rather than increased heat loss was the mech-ANISM WHEREBY RESERPINE EXERTED ITS EFFECT ON COOLING RATE. Physiologic doses of thyroxine (50 micrograms/kg.) were found to improve the metabolic response of reserpine-treated rats to cold and to return their cooling rates toward control values. TSH (thyroid stimulating hormone) administration to reserpine-treated rats did not improve their response to cold. These observations suggested that reserpine may interfere with the normal response of the thyroid gland to stimulation by TSH, but not to peripheral utilization of thyroid hormone. (Author)

Descriptors :   *BODY TEMPERATURE, *RESERPINE, *THYROXINE, EXPOSURE(PHYSIOLOGY), HEAT PRODUCTION (BIOLOGY), LABORATORY ANIMALS, OXYGEN CONSUMPTION, PITUITARY HORMONES

Distribution Statement : APPROVED FOR PUBLIC RELEASE