PMID- 24732636 OWN - NLM STAT- MEDLINE DCOM- 20150126 LR - 20140609 IS - 1873-5177 (Electronic) IS - 0091-3057 (Linking) VI - 122 DP - 2014 Jul TI - Effects of (+)-8-OH-DPAT on the duration of immobility during the forced swim test and hippocampal cell proliferation in ACTH-treated rats. PG - 240-5 LID - S0091-3057(14)00110-5 [pii] LID - 10.1016/j.pbb.2014.04.003 [doi] AB - In the present study, we examined the effect of ACTH on the immobilization of rats in the forced swim test and hippocampal cell proliferation after administration of the 5-HT1A receptor agonist, R-(+)-8-hydroxy-2-di-n-propylamino tetralin ((+)-8-OH-DPAT). Chronic treatment with (+)-8-OH-DPAT (0.01-0.1 mg/kg, s.c.) significantly decreased the duration of immobility in saline- and ACTH-treated rats. Chronic administration of ACTH caused a significant decrease in hippocampal cell proliferation. However, (+)-8-OH-DPAT significantly normalized cell proliferation in ACTH-treated rats. We then investigated the effects of (+)-8-OH-DPAT on the expression of brain-derived neurotrophic factor (BDNF) and cyclin D1 (elements of cyclic adenosine monophosphate response element-binding protein (CREB)-BDNF and Wnt signaling pathways, respectively) in the hippocampus of saline- and ACTH-treated rats. ACTH treatment significantly decreased the expression of cyclin D1, while treatment with (+)-8-OH-DPAT normalized the expression of cyclin D1 in ACTH-treated rats. However, the expression of BDNF did not change in either saline- or ACTH-treated rats. These findings suggest that the antidepressant effects of (+)-8-OH-DPAT in treatment-resistant animals may be attributed to an enhancement of hippocampal cell proliferation, at least in part due to an enhancement of cyclin D1 expression. CI - Copyright (c) 2014 Elsevier Inc. All rights reserved. FAU - Miyake, Ayaka AU - Miyake A AD - Department of Clinical Pharmacy, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan. FAU - Kitamura, Yoshihisa AU - Kitamura Y AD - Department of Clinical Pharmacy, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan. Electronic address: kitamu-y@cc.okayama-u.ac.jp. FAU - Miyazaki, Ikuko AU - Miyazaki I AD - Department of Brain Science, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan. FAU - Asanuma, Masato AU - Asanuma M AD - Department of Brain Science, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan. FAU - Sendo, Toshiaki AU - Sendo T AD - Department of Clinical Pharmacy, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140413 PL - United States TA - Pharmacol Biochem Behav JT - Pharmacology, biochemistry, and behavior JID - 0367050 RN - 0 (Antidepressive Agents) RN - 78950-78-4 (8-Hydroxy-2-(di-n-propylamino)tetralin) RN - 9002-60-2 (Adrenocorticotropic Hormone) SB - IM MH - 8-Hydroxy-2-(di-n-propylamino)tetralin/*pharmacology/therapeutic use MH - Adrenocorticotropic Hormone/*toxicity MH - Animals MH - Antidepressive Agents/pharmacology/therapeutic use MH - Cell Proliferation/*drug effects/physiology MH - Depression/drug therapy/pathology/psychology MH - Hippocampus/cytology/*drug effects/physiology MH - Immobilization/physiology/*psychology MH - Male MH - Rats MH - Rats, Wistar MH - Swimming/*psychology MH - Time Factors OTO - NOTNLM OT - 5-HT(1A) receptor OT - 8-OH-DPAT OT - Adrenocorticotropic hormone OT - Cell proliferation OT - Cyclin D1 OT - Forced swim test EDAT- 2014/04/16 06:00 MHDA- 2015/01/27 06:00 CRDT- 2014/04/16 06:00 PHST- 2014/01/15 00:00 [received] PHST- 2014/03/10 00:00 [revised] PHST- 2014/04/05 00:00 [accepted] PHST- 2014/04/16 06:00 [entrez] PHST- 2014/04/16 06:00 [pubmed] PHST- 2015/01/27 06:00 [medline] AID - S0091-3057(14)00110-5 [pii] AID - 10.1016/j.pbb.2014.04.003 [doi] PST - ppublish SO - Pharmacol Biochem Behav. 2014 Jul;122:240-5. doi: 10.1016/j.pbb.2014.04.003. Epub 2014 Apr 13.