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Titolo:
Low environmental temperature modulates gustatory nerve activity and behavioral responses to NaCl in rats
Autore:
Shimizu, Y; Tonosaki, K;
Indirizzi:
Gifu Univ, Fac Agr, Dept Vet Physiol, Gifu 5011193, Japan Gifu Univ GifuJapan 5011193 Agr, Dept Vet Physiol, Gifu 5011193, Japan
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 2, volume: 46, anno: 1999,
pagine: R368 - R373
SICI:
0363-6119(199908)46:2<R368:LETMGN>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHORDA TYMPANI RESPONSE; AMILORIDE SENSITIVITY; SODIUM-CHLORIDE; TASTE RECEPTION; WISTAR RATS; FISCHER-344; COLD;
Keywords:
chorda tympani; sodium intake; sodium preference;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Tonosaki, K Gifu Univ, Fac Agr, Dept Vet Physiol, Gifu 5011193, Japan GifuUniv Gifu Japan 5011193 et Physiol, Gifu 5011193, Japan
Citazione:
Y. Shimizu e K. Tonosaki, "Low environmental temperature modulates gustatory nerve activity and behavioral responses to NaCl in rats", AM J P-REG, 46(2), 1999, pp. R368-R373

Abstract

We studied the effects of cold ambient temperature on chorda tympani nerveresponses to taste stimuli such as sucrose, NaCl, quinine HCl (QHCl), and HCl in rats. The electrophysiological recordings of the whole chorda tympani nerves from control (22 degrees C) and cold-exposed (4 degrees C) rats revealed that the responses to sucrose, HCl, and QHCl were unaffected by coldexposure. In contrast, the nerve responses to NaCl were enhanced time dependently, reaching a maximum 7-14 days after cold exposure. Responses to sodium acetate were likewise elevated as they were to NaCl, whereas those to KCl were unchanged after cold exposure. In addition, the residual NaCl responses after lingual application of the sodium-channel blocker amiloride in cold-exposed rats were similar to those in control animals. It is thus most likely that cold exposure potentiates the chorda tympani nerve responses toNat, but not to Cl-. Behavioral studies with the two-bottle preference test showed that the cold-exposed rats refused to drink NaCl solutions at 0.05and 0.1 M, the concentrations being preferred by control animals. These results suggest that the ambient temperature influences taste cell function, and that the enhanced NaCl response of the chorda tympani nerve is related to the avoidance of NaCl intake under cold environment.

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Documento generato il 16/07/20 alle ore 06:09:59