title: Quantitative Analysis of Psoralea corylifolia Linne and its Neuroprotective and Anti-Neuroinflammatory Effects in HT22 Hippocampal Cells and BV-2 Microglia.
abstract: The seeds of Psoralea corylifolia L. (P. corylifolia), also known as "Bo-Gol-Zhee" in Korea, are used in a traditional herbal medicine for treating various skin diseases. In the present study, we performed quantitative analyses of the seven standard components of P. corylifolia: psoralen, angelicin, neobavaisoflavone, psoralidin, isobavachalcone, bavachinin, and bakuchiol, using high-performance liquid chromatography. We also investigated the neuroprotective and anti-neuroinflammation effects of P. corylifolia and its standard components in the hippocampal cell line HT22 and microglia cell line BV-2. A 70% ethanol extract of P. corylifolia was prepared and the seven standard components were separated using C-18 analytical columns by gradient solvents with acetonitrile and water, and ultraviolet detection at 215, 225 and 275 nm. The analytical method showed high linearity, with a correlation coefficient of ≥0.9999. The amounts of the standard components ranged from 0.74 to 11.71 mg/g. Among the components, bakuchiol (11.71 mg/g) was the most potent phytochemical component of P. corylifolia. Furthermore, we analyzed the inhibitory effects of the components from P. corylifolia to determine the bioactive compound needed to regulate neuronal cell changes. Angelicin, isobavachalcone, and bakuchiol suppressed lipopolysaccharide (LPS)-stimulated nitric oxide production in LPS-treated BV-2 microglia more significantly than did the other components. In HT22 hippocampal cells, neobavaisoflavone and bakuchiol had more potent inhibitory activity against hydrogen peroxide-induced cell death. Taken together of the quantification and efficacy analyses, bakuchiol appeared to be the most potent bioactive phytochemical component of P. corylifolia for the potential treatment of neurodegenerative diseases.
authors.affiliation: Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea. jinjin0228@kiom.re.kr.
authors.forename: Yu Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea. qp1015@kiom.re.kr.
authors.forename: Hye-Sun
authors.initials: HS
authors.lastname: Lim
authors.affiliation: Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea. junlee@kiom.re.kr.|Korean Medicine Life Science, University of Science & Technology, Daejeon 34113, Korea. junlee@kiom.re.kr.
authors.forename: Jun
authors.initials: J
authors.lastname: Lee
authors.affiliation: Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea. sjijeong@kiom.re.kr.|Korean Medicine Life Science, University of Science & Technology, Daejeon 34113, Korea. sjijeong@kiom.re.kr.
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Jeong
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000737:chemistry / Q000494:pharmacology*; D002460:Cell Line; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006624:Hippocampus / Q000166:cytology / Q000187:drug effects*; D008070:Lipopolysaccharides / Q000009:adverse effects; D051379:Mice; D017628:Microglia / Q000187:drug effects*; D015394:Molecular Structure; D018696:Neuroprotective Agents / Q000737:chemistry / Q000494:pharmacology*; D009569:Nitric Oxide / Q000378:metabolism; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D029907:Psoralea / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry
chemical_list: D000893:Anti-Inflammatory Agents; D008070:Lipopolysaccharides; D018696:Neuroprotective Agents; D010636:Phenols; D010936:Plant Extracts; D009569:Nitric Oxide; C012765:bakuchiol
keywords: Psoraleae corylifolia; bakuchiol; neuro-inflammation; neuroprotection; quantitative analysis