Abstract��OBJECTIVE To investigate the anti-depressant effect of icariin (Ica)in rats with depression caused by chronic unpredictable mild stress (CUMS) as well as the relevant mechanism. METHODS The depression-like rat model with chronic unpredicted mild stress was established. Rats were randomly divided into normal control, CUMS model, CUMS+Fluoxetine (10 mg��kg-1) and CUMS + Ica(10, 20, 40 mg��kg-1) groups. Drugs or vehicle were administrated after stress procedures for 21 d. Open-field test (OFT), sucrose preference tests (SPT)and forced swim test (FST) were used to evaluate the anti-depressant effects of Ica. The concentrations of the monoamine neurotransmitters including noradrenaline (NA), dopamine (DA), and 5-hydroxytryptamine (5-HT)in prefrontal cortex, hippocampus, and striatum were measured by HPLC-ECD. RESULTS Behavioral test indicated that crossing score and rearing score in OFT and sucrose preference index in SPT of model group were significantly lower than normal control group(P<0.01), while immobility time in FST was significantly increased (P<0.01). Compared with those in normal control group, the neurotransmitters including NA, DA and 5-HT were significantly decreased (P<0.01) in prefrontal cortex, hippocampus, and striatum in rats of CUMS. Ica and fluoxetine reversed those changes induced by CUMS. CONCLUSION Ica improves the depression-like behaviors of rats induced by CUMS, of which the mechanism might be increasing the contents of monoamine neurotransmitters including NA, DA and 5-HT.
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ZHANG Cong, LU Hui-qin, HU Chu-xuan, MEI Qing-hua, ZHANG Xia, HUANG Xiao-ling. Effect of Icariin on Behavior and Monoamine Neurotransmitters in Rats with Depression Induced by Chronic Unpredicted Mild Stress. Chinese Pharmaceutical Journal, 2018, 53(15): 1280-1284.
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2018, Vol. 53 
