PMID- 17906978 OWN - NLM STAT- MEDLINE DCOM- 20080225 LR - 20131121 IS - 1438-2199 (Electronic) IS - 0939-4451 (Linking) VI - 34 IP - 1 DP - 2008 Jan TI - Relationships between the sedative and hypnotic effects of intracerebroventricular administration of L-serine and its metabolites, pyruvate and the derivative amino acids contents in the neonatal chicks under acute stressful conditions. PG - 55-60 AB - Intracerebroventricular (i.c.v.) injection of L-serine was shown to have sedative and hypnotic effects on neonatal chicks under acute stressful conditions. To clarify the central mechanism of these effects of L-serine, two experiments were done. First, we focused on the glycogenic pathway in which L-serine is converted into pyruvate and finally glucose. I.c.v. administration of pyruvate (0.84 micromol) did not induce any behavioral and endocrinological changes, while L-serine and glucose triggered sedative and hypnotic effects. Secondly, the relationship between the sedation by L-serine and the metabolism into other amino acids which have sedative effects was investigated in the telencephalon and diencephalon. In both brain areas, a dose-dependent increase was seen in L-serine, although other amino acids were not changed. In the present study, it was concluded that the sedative action of L-serine was not due to the action of its metabolite pyruvate, or to the action of other amino acids. FAU - Asechi, M AU - Asechi M AD - Laboratory of Advanced Animal and Marine Bioresources, Graduate School of Bioresources and Bioenvironmental Sciences, Kyushu University, Fukuoka, Japan. FAU - Kurauchi, I AU - Kurauchi I FAU - Tomonaga, S AU - Tomonaga S FAU - Yamane, H AU - Yamane H FAU - Suenaga, R AU - Suenaga R FAU - Tsuneyoshi, Y AU - Tsuneyoshi Y FAU - Denbow, D M AU - Denbow DM FAU - Furuse, M AU - Furuse M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20071002 PL - Austria TA - Amino Acids JT - Amino acids JID - 9200312 RN - 0 (Amino Acids) RN - 0 (Hypnotics and Sedatives) RN - 8558G7RUTR (Pyruvic Acid) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Amino Acids/*administration & dosage/chemistry/metabolism/pharmacology MH - Animals MH - Animals, Newborn MH - Chickens MH - Glucose/administration & dosage/pharmacology MH - Hypnotics and Sedatives/*administration & dosage/chemistry/metabolism/pharmacology MH - Injections MH - Male MH - Molecular Structure MH - Pyruvic Acid/*administration & dosage/chemistry/metabolism/pharmacology MH - Time Factors EDAT- 2007/10/02 09:00 MHDA- 2008/02/26 09:00 CRDT- 2007/10/02 09:00 PHST- 2007/04/10 00:00 [received] PHST- 2007/07/26 00:00 [accepted] PHST- 2007/10/02 09:00 [pubmed] PHST- 2008/02/26 09:00 [medline] PHST- 2007/10/02 09:00 [entrez] AID - 10.1007/s00726-007-0596-y [doi] PST - ppublish SO - Amino Acids. 2008 Jan;34(1):55-60. doi: 10.1007/s00726-007-0596-y. Epub 2007 Oct 2.