Effect of Chaihu-Shugan-San on the mRNA expression of the 5-HT1A receptor and cellular proliferation in the hippocampus of epileptic rats with depression

Yang,Ping; Li,Liang; Liu,Xue‑Jun; Cai,Xiong; Sun,Mei‑Zhen; He,Jun‑Feng; Zeng,Guang; Huang,Hui‑Yong

doi:10.3892/etm.2015.2867

Effect of Chaihu-Shugan-San on the mRNA expression of the 5-HT1A receptor and cellular proliferation in the hippocampus of epileptic rats with depression

Authors:
- Ping Yang
- Liang Li
- Xue‑Jun Liu
- Xiong Cai
- Mei‑Zhen Sun
- Jun‑Feng He
- Guang Zeng
- Hui‑Yong Huang
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Affiliations: Department of Psychiatrics, Hunan Brain Hospital, Changsha, Hunan 410007, P.R. China, Provincial Key Laboratory of TCM Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan 410208, P.R. China, Department of Neurology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
Published online on: November 13, 2015 https://doi.org/10.3892/etm.2015.2867
Pages: 124-130
Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Chaihu-Shugan-San (CHSGS) is a herbal preparation that has been shown to effectively relieve neurologic impairment and reduce depression. However, the efficacy of CHSGS in the treatment of patients with epilepsy with depression is unknown. Therefore, in the present study, adult rats were exposed to chronic mild stress following the establishment of chronic pilocarpine‑induced epilepsy. Subsequently, a sucrose consumption test and open‑field test (OFT) were performed to assess depression‑like behavior. Rats were randomly divided into four groups: Control, model, fluoxetine (1.8 g/kg) and CHSGS (2.7 g/kg) groups. The control and model groups received normal saline. The mRNA expression levels of the 5‑hydroxytryptamine 1A (5‑HT1A) receptor and the number of 5‑bromo‑2'‑deoxyuridine (BrdU)‑labeled cells in the hippocampal dentate gyrus were detected using reverse transcription‑quantitative polymerase chain reaction and immunohistochemical analysis, respectively. Treatment administration was conducted by once daily intragastric perfusion for 28 days. The mRNA expression levels of the 5‑HT1A receptor, the number of BrdU‑labeled cells in the hippocampal dentate gyrus, the consumption of sucrose, and frequency of vertical and horizontal movement scores in the OFT were enhanced in the fluoxetine and CHSGS groups compared with the model group (P<0.05). However, no statistically significant difference was detected between the fluoxetine and CHSGS groups. These data suggest that CHSGS is able to increase the expression of 5‑HT1A receptor mRNA and cellular proliferation in the hippocampal dentate gyrus in epileptic rats with depression, and thus effectively improve certain symptoms of depression.

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