title: Protective activity of the ethanol extract of Cynanchum paniculatum (BUNGE) Kitagawa on treating herpes simplex encephalitis.
abstract: To date there has been no valid treatment for herpes simplex encephalitis (HSV). This study explores the protective activity of ethanol extract of  Cynanchum paniculatum (bunge) kitagawa for treatment of HSV. Cell models and animal models were established and divided into 4 groups: normal group, virus group, cynanchum paniculatum group and Dexamethasone group. Flow cytometry was employed to detect apoptosis of cell model and TUNEL assay was chosen to detect apoptosis of animal tissues. The survival time of the animal models was observed. ELISA  was used to measure TNF-alpha expression and  the Greiss method to measure Nitric Oxide (NO) expression in the mouse brain. As a result, it was found that extract of Cynanchum paniculatum can improve the survival rate of HSV-infected mice. The extract could prevent apoptosis in the neuron cell model and reduce apoptosis rate in brain tissue after HSV infection. With the extract intervention,  TNF-alpha and NO levels in brain tissue were significantly decreased in the animal model. In conclusion, the extract of Cynanchum paniculatum can prevent HSV-inducing impairment in the cell and animal model of HSE.
authors.affiliation: Department of Neurology, the People&#x0027;s Hospital of Guangxi Zhuang Autonomous Region, Nanning, P.R. China.
authors.forename: X-F
authors.initials: XF
authors.lastname: Li
authors.forename: Y-J
authors.initials: YJ
authors.lastname: Guo
authors.forename: D-M
authors.initials: DM
authors.lastname: Zhang
authors.forename: Z
authors.initials: Z
authors.lastname: Chen
authors.forename: X
authors.initials: X
authors.lastname: Wei
authors.forename: Y-H
authors.initials: YH
authors.lastname: Li
authors.forename: S-L
authors.initials: SL
authors.lastname: Zhang
authors.forename: J-Y
authors.initials: JY
authors.lastname: Tao
authors.forename: J-H
authors.initials: JH
authors.lastname: Dong
authors.forename: Y-W
authors.initials: YW
authors.lastname: Mei
authors.forename: L-L
authors.initials: LL
authors.lastname: Li
authors.forename: L
authors.initials: L
authors.lastname: Zhao
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D001923:Brain Chemistry; D031105:Cynanchum; D019610:Cytoprotection; D020803:Encephalitis, Herpes Simplex / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009569:Nitric Oxide / Q000032:analysis; D016716:PC12 Cells; D008517:Phytotherapy; D010936:Plant Extracts / Q000494:pharmacology / Q000627:therapeutic use*; D051381:Rats; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis
chemical_list: D010936:Plant Extracts; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide