PMID- 28238069 OWN - NLM STAT- MEDLINE DCOM- 20171201 LR - 20190318 IS - 1432-2072 (Electronic) IS - 0033-3158 (Linking) VI - 234 IP - 7 DP - 2017 Apr TI - Novel 5-HT(3) receptor antagonist QCM-4 attenuates depressive-like phenotype associated with obesity in high-fat-diet-fed mice. PG - 1165-1179 LID - 10.1007/s00213-017-4558-0 [doi] AB - RATIONALE: Depression associated with obesity remains an interesting area to study the biological mechanisms and novel therapeutic intervention. OBJECTIVES: The present study investigates the effect of a novel 5-HT(3) receptor antagonist 3-methoxy-N-p-tolylquinoxalin-2-carboxamide (QCM-4) on several pathogenic markers of depression associated with obesity such as plasma insulin resistance, hippocampal cyclic adenosine monophosphate (cAMP), brain-derived neurotrophic factor (BDNF), serotonin (5-HT) concentrations, hippocampal neuronal damage, and p53 protein expression in high-fat-diet (HFD)-fed mice. METHODS: Obesity was experimentally induced in mice by feeding with HFD for 14 weeks followed by administration of QCM-4 (1 and 2 mg/kg, p.o.)/standard escitalopram (ESC) (10 mg/kg, p.o.)/vehicle (10 ml/kg, p.o.) for 28 days. Behavioral assays such as sucrose preference test (SPT); forced swim test (FST); elevated plus maze (EPM); biochemical assays including oral glucose tolerance tests (OGTT), insulin, cAMP, BDNF, and 5-HT concentrations; and molecular assays mainly histology and immunohistochemistry (IHC) of p53 protein in the dentate gyrus (DG), CA1, and CA3 regions of hippocampus in HFD fed mice were performed. RESULTS: Chronic treatment with QCM-4 in HFD-fed mice reversed the behavioral alterations in SPT, FST, and EPM. QCM-4 showed poor sensitivity for plasma glucose, improved insulin sensitivity, increased hippocampal cAMP, BDNF, and 5-HT concentrations. In the hippocampal DG, CA1, and CA3 regions, QCM-4 treatment improved the neuronal morphology in the histopathology and inhibited p53 protein expression in IHC assay in HFD-fed mice. CONCLUSION: QCM-4 attenuated the depressive-like phenotype in HFD-fed mice by improving behavioral, biochemical, and molecular alterations through serotonergic neuromodulation. FAU - Kurhe, Yeshwant AU - Kurhe Y AD - Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Pilani Campus, Pilani, Rajasthan, 333031, India. yashkurhe@gmail.com. FAU - Mahesh, R AU - Mahesh R AD - Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Pilani Campus, Pilani, Rajasthan, 333031, India. FAU - Devadoss, Thangaraj AU - Devadoss T AD - Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University (IMU), No. 126, Jalan Jalil Perkasa 19, 57000, Bukit Jalil, Kuala Lumpur, Malaysia. LA - eng PT - Journal Article DEP - 20170225 PL - Germany TA - Psychopharmacology (Berl) JT - Psychopharmacology JID - 7608025 RN - 0 (3-methoxy-N-p-tolylquinoxalin-2-carboxamide) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Quinoxalines) RN - 0 (Serotonin 5-HT3 Receptor Antagonists) RN - 0 (Tumor Suppressor Protein p53) RN - 333DO1RDJY (Serotonin) SB - IM MH - Animals MH - Anxiety/drug therapy/psychology MH - Brain Chemistry/drug effects MH - Brain-Derived Neurotrophic Factor/metabolism MH - Depression/complications/*drug therapy/psychology MH - Diet, High-Fat MH - Hippocampus/drug effects/metabolism MH - Insulin Resistance MH - Male MH - Mice MH - Motor Activity/drug effects MH - Obesity/*psychology MH - Quinoxalines/*therapeutic use MH - Serotonin/metabolism MH - Serotonin 5-HT3 Receptor Antagonists/*therapeutic use MH - Swimming/psychology MH - Tumor Suppressor Protein p53/metabolism OTO - NOTNLM OT - *BDNF OT - *Depression OT - *Obesity OT - *Serotonin OT - *p53 EDAT- 2017/02/27 06:00 MHDA- 2017/12/02 06:00 CRDT- 2017/02/27 06:00 PHST- 2016/07/20 00:00 [received] PHST- 2017/02/02 00:00 [accepted] PHST- 2017/02/27 06:00 [pubmed] PHST- 2017/12/02 06:00 [medline] PHST- 2017/02/27 06:00 [entrez] AID - 10.1007/s00213-017-4558-0 [pii] AID - 10.1007/s00213-017-4558-0 [doi] PST - ppublish SO - Psychopharmacology (Berl). 2017 Apr;234(7):1165-1179. doi: 10.1007/s00213-017-4558-0. Epub 2017 Feb 25.