Objective To study the relationship between the expression of matrix metalloproteinase-9 in rat brain and pathogenesis of epilepsy.Methods The expression of matrix metalloproteinase-9 in hippocampus was observed by immunochemistry in normal and epilepsy rat.Meanwile,the effects of dexamethasone before epilepsy on the expression of MMP-9 in hippocampus was evaluated.Results The expression of MMP-9 in hippocampus were fewer in normal rat brain.The expression of MMP-9 had increased in hippocampus after epilepsy 24h.It had increased obviously in dentate gyrus(DG)after epilepsy 72h than 24h(P0.05).Dexamethasone suppressed the expression of MMP-9 in hippocampus.Conclusion The expression of MMP-9 in rat brain participates in immunopathogenesis of epilepsy by affecting brain immunoreaction,leading to the change of neuronal response and synapse remodeling in hippocampus,regulating brain nervous cell excitability.Dexamethasone plays a prominent suppressant role in the processes.

Objective To study the correlation among property, efficacy and target of herbal Chinese materia medica; To analyze the molecular mechanism of cold and heat property of Chinese materia medica; To provide references for explaination of microcosmic mechanism and scientific connotation of property of Chinese materia medica. Methods Recordings about property and efficacy of single medicine in 2015 edition of Pharmacopoeia of the People's Republic of China were sorted out. According to Pharmacological Research of New Ideas and New Targets and Pharmacology, 509 kinds of herbal Chinese materia medica were selected. Relevant articles about property, efficacy, pharmacologic action, and target in CNKI and Chinese Academic Journal Database (Wanfang Data) were searched by computers. The target information was screened and standardized, and the database was constructed by using MySQL5.7.13. The correlation between the property, efficacy and the target of the herbal Chinese materia medica was studied by using the frequency analysis and correlation rule algorithm of R software platform 3.3.1. Results 509 kinds of herbal Chinese materia medica were selected, including 227 kinds of cold-property medicine, 106 kinds of neutural-property medicine and 176 kinds of hot-property medicine. According to the result of data mining, efficacy of cold-roperty medicine was quenching thirst, clearing liver and treating stranguriaetc. The target was transforming growth factor β2 and liver microsome, etc. The efficacy of hot-property medicine was warming the middle, releasing cold and dissolving lumps. The target was bone morphology protein 2, rheumatoid factor, etc. The efficacy of neutural-property medicine was clearing lungs, diminishing distension and increasing energy. The target was β-amyloid and prostaglandin E2 receptors. Conclusion There is certain correlation in property, efficacy and target in Chinese materia medica.