PMID- 2610096 OWN - NLM STAT- MEDLINE DCOM- 19900209 LR - 20190622 IS - 0065-2598 (Print) IS - 0065-2598 (Linking) VI - 247B DP - 1989 TI - Studies on the mechanism of the sedational state; "tranquilization" evoked by bradykinin or kallikrein in rats. PG - 595-600 AB - The mechanism of the sedative state "tranquilization" evoked by bradykinin(BK) or kallikrein(Kal), was studied. The drugs were injected intracerebroventricularly(icv) into the lateral ventricle, according to Yaksh's procedure. The behavior of a rat was estimated comparatively by the spontaneous movement. Two groups of animals were examined; one group was pretreated with prostaglandin (PG)-synthesis inhibitors, and the other group was not pretreated. The tranquilization was observed at the period of 12 to 16 min after BK or Kal injection. Almost of the PG-synthesis inhibitors reduced the tranquilization. On the contrary, eugenol or guaiacol, elongated the tranquilization. The levels of monoamines and PGs in the rat brain at the tranquilization, 15 min after BK injection detected with HPLC (high performance liquid chromatography). The levels of almost monoamines in the rat brain were decreased, however, PGE2 was increased considerably. Those results suggest that PGs is greatly involved in tranquilization evoked by BK or Kal. FAU - Yazaki, K AU - Yazaki K AD - Department of Pharmacology, Tokyo Dental College, Chiba, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Adv Exp Med Biol JT - Advances in experimental medicine and biology JID - 0121103 RN - 0 (Prostaglandins) RN - 0 (Prostaglandins E) RN - 0 (Tranquilizing Agents) RN - 333DO1RDJY (Serotonin) RN - EC 3.4.21.- (Kallikreins) RN - H0C805XYDE (Quinacrine) RN - S8TIM42R2W (Bradykinin) RN - VTD58H1Z2X (Dopamine) RN - XXE1CET956 (Indomethacin) RN - YKH834O4BH (Epinephrine) SB - IM MH - Animals MH - Bradykinin/administration & dosage/*pharmacology MH - Brain/drug effects/metabolism MH - Cerebral Ventricles/drug effects/*physiology MH - Dopamine/metabolism MH - Epinephrine/metabolism MH - Indomethacin/pharmacology MH - Injections, Intraventricular MH - Kallikreins/administration & dosage/*pharmacology MH - Male MH - Motor Activity/*drug effects MH - Prostaglandins/metabolism MH - Prostaglandins E/administration & dosage/pharmacology MH - Quinacrine/pharmacology MH - Rats MH - Rats, Inbred Strains MH - Reference Values MH - Serotonin/metabolism MH - *Tranquilizing Agents EDAT- 1989/01/01 00:00 MHDA- 1989/01/01 00:01 CRDT- 1989/01/01 00:00 PHST- 1989/01/01 00:00 [pubmed] PHST- 1989/01/01 00:01 [medline] PHST- 1989/01/01 00:00 [entrez] AID - 10.1007/978-1-4615-9546-5_97 [doi] PST - ppublish SO - Adv Exp Med Biol. 1989;247B:595-600. doi: 10.1007/978-1-4615-9546-5_97.