PMID- 28240721 OWN - NLM STAT- MEDLINE DCOM- 20180112 LR - 20180112 IS - 1473-558X (Electronic) IS - 0959-4965 (Linking) VI - 28 IP - 5 DP - 2017 Mar 22 TI - Cucurbitacin IIa exerts antidepressant-like effects on mice exposed to chronic unpredictable mild stress. PG - 259-267 LID - 10.1097/WNR.0000000000000747 [doi] AB - Cucurbitacin IIa (CuIIa) is the major active component of the Helmseya amabilis root and is known to have antiviral and anti-inflammatory effects. In this study, we examined the antidepressant-like effects of CuIIa in a mouse model of chronic unpredictable mild stress (CUMS) and investigated the possible underlying mechanisms. To evaluate the antidepressant-like effects of CuIIa on depression-like behaviors, mice were subjected to the open-field test, the elevated plus-maze test, the forced-swimming test, and the tail-suspension test. We found that CuIIa treatment reversed the CUMS-induced behavioral abnormalities. Western blot analyses showed that CUMS significantly decreased brain-derived neurotrophic factor (BDNF) levels, cAMP-response element binding protein (CREB), and calcium/calmodulin-dependent protein kinase II (CaMKII) phosphorylation, and N-methyl-D-aspartate receptor subtype GluN2B and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor GluA1 expression in the amygdala; in addition, the expression of gamma-aminobutyric acid receptor A subunit alpha2 was upregulated in CUMS mice. These CUMS-induced changes were all normalized by CuIIa treatment and administration of the BDNF antagonist ANA-12 can block the antidepressant effect of CuIIa. Our findings suggest that the antidepressant-like effects of CuIIa may be exerted by regulation of the CaMKIIalpha-CREB-BDNF pathway and the balance between excitatory and inhibitory synaptic transmission in the amygdala. FAU - Zhou, Shi-Meng AU - Zhou SM AD - Departments of aPharmacology bMedicinal Chemistry cPharmaceutical Analysis, School of Pharmacy dClinical medicine Cadet Brigade, Fourth Military Medical University, Xi'an, China. FAU - Guan, Shao-Yu AU - Guan SY FAU - Yang, Le AU - Yang L FAU - Yang, Liu-Kun AU - Yang LK FAU - Wang, Lu AU - Wang L FAU - Nie, Hui-Fang AU - Nie HF FAU - Li, Xiang AU - Li X FAU - Zhao, Ming-Gao AU - Zhao MG FAU - Yang, Qi AU - Yang Q FAU - Wu, Hong AU - Wu H LA - eng PT - Journal Article PL - England TA - Neuroreport JT - Neuroreport JID - 9100935 RN - 0 (ANA 12 compound) RN - 0 (Antidepressive Agents) RN - 0 (Azepines) RN - 0 (Benzamides) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 0 (cucurbitacin IIa) RN - 60137-06-6 (Cucurbitacins) RN - EC 2.3.1.48 (CREB-Binding Protein) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinase Type 2) SB - IM MH - Amygdala/drug effects/metabolism MH - Animals MH - Antidepressive Agents/*therapeutic use MH - Azepines/therapeutic use MH - Benzamides/therapeutic use MH - Brain-Derived Neurotrophic Factor/metabolism MH - CREB-Binding Protein/metabolism MH - Calcium-Calmodulin-Dependent Protein Kinase Type 2/metabolism MH - Chronic Disease MH - Cucurbitacins/*therapeutic use MH - Depression/*drug therapy/*etiology MH - Disease Models, Animal MH - Dose-Response Relationship, Drug MH - Exploratory Behavior/drug effects MH - Hindlimb Suspension MH - Male MH - Maze Learning/drug effects MH - Mice MH - Mice, Inbred BALB C MH - Receptors, N-Methyl-D-Aspartate/metabolism MH - Stress, Psychological/*complications/drug therapy MH - Swimming/psychology EDAT- 2017/02/28 06:00 MHDA- 2018/01/13 06:00 CRDT- 2017/02/28 06:00 PHST- 2017/02/28 06:00 [pubmed] PHST- 2018/01/13 06:00 [medline] PHST- 2017/02/28 06:00 [entrez] AID - 10.1097/WNR.0000000000000747 [doi] PST - ppublish SO - Neuroreport. 2017 Mar 22;28(5):259-267. doi: 10.1097/WNR.0000000000000747.