PMID- 15939085 OWN - NLM STAT- MEDLINE DCOM- 20050812 LR - 20131121 IS - 0165-3806 (Print) IS - 0165-3806 (Linking) VI - 157 IP - 1 DP - 2005 Jun 9 TI - Regulation of body temperature by thyrotropin-releasing hormone in neonatal chicks. PG - 58-64 AB - To understand thermal regulation of neonatal chicks, the contribution of thyrotropin-releasing hormone (TRH), a key regulator of the hypothalamus-pituitary-thyroid axis, was investigated. Intracerebroventricular (i.c.v.) injection of TRH (5 and 20 microg) increased body temperature, but did not change plasma T3 and T4 concentrations. Intraperitoneal (i.p.) injection of triiodothyronine (T3) and thyroxine (T4) did not influence body temperature. Thereafter, the relationships between TRH and the hypothalamus-pituitary-adrenal axis and sympathetic nervous system were further investigated. Central TRH stimulated both corticosterone and epinephrine release. The i.c.v. injection of a corticotropin-releasing factor receptor antagonist attenuated the change in body temperature and corticosterone concentration caused by TRH, but did not influence plasma T3 and T4 concentrations. The i.p. injection of epinephrine did not induce hyperthermia. Therefore, the thermoregulatory response to TRH may differ in neonatal stages being dependent upon the stimulation of the hypothalamus-pituitary-adrenal axis rather than the hypothalamus-pituitary-thyroid axis. FAU - Takahashi, Hirokazu AU - Takahashi H AD - Laboratory of Advanced Animal and Marine Bioresources, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 812-8581, Japan. FAU - Iigo, Masayuki AU - Iigo M FAU - Ando, Koichi AU - Ando K FAU - Tachibana, Tetsuya AU - Tachibana T FAU - Denbow, D Michael AU - Denbow DM FAU - Furuse, Mitsuhiro AU - Furuse M LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20050412 PL - Netherlands TA - Brain Res Dev Brain Res JT - Brain research. Developmental brain research JID - 8908639 RN - 0 (Peptide Fragments) RN - 06LU7C9H1V (Triiodothyronine) RN - 170809-51-5 (astressin) RN - 5Y5F15120W (Thyrotropin-Releasing Hormone) RN - 9015-71-8 (Corticotropin-Releasing Hormone) RN - Q51BO43MG4 (Thyroxine) RN - W980KJ009P (Corticosterone) RN - YKH834O4BH (Epinephrine) SB - IM MH - Animals MH - Animals, Newborn/blood/physiology MH - Body Temperature/*drug effects/physiology MH - Chickens MH - Corticosterone/metabolism MH - Corticotropin-Releasing Hormone/pharmacology MH - Dose-Response Relationship, Drug MH - Drug Administration Routes MH - Drug Interactions MH - Epinephrine/metabolism MH - Injections, Intraventricular/methods MH - Male MH - Peptide Fragments/pharmacology MH - Thyrotropin-Releasing Hormone/antagonists & inhibitors/*pharmacology MH - Thyroxine/administration & dosage/blood MH - Triiodothyronine/administration & dosage/blood EDAT- 2005/06/09 09:00 MHDA- 2005/08/13 09:00 CRDT- 2005/06/09 09:00 PHST- 2004/08/23 00:00 [received] PHST- 2005/03/06 00:00 [revised] PHST- 2005/03/10 00:00 [accepted] PHST- 2005/06/09 09:00 [pubmed] PHST- 2005/08/13 09:00 [medline] PHST- 2005/06/09 09:00 [entrez] AID - S0165-3806(05)00086-6 [pii] AID - 10.1016/j.devbrainres.2005.03.004 [doi] PST - ppublish SO - Brain Res Dev Brain Res. 2005 Jun 9;157(1):58-64. doi: 10.1016/j.devbrainres.2005.03.004. Epub 2005 Apr 12.