title: P38-associated pathway involvement in apoptosis induced by photodynamic therapy with Lonicera japonica in human lung squamous carcinoma CH27 cells.
abstract: Photodynamic therapy (PDT) is an effective therapy for local malignant tumors. Lonicera japonica was found to have the anti-tumor effect. The aim of this study is to explore the mechanisms of apoptosis induced by PDT in lung CH27 carcinoma cells with alcohol extract from Lonicera japonica as photosensitizer. Our study indicated that Lonicera japonica extracts exhibited significant photocytotoxicity in CH27 cells at a concentration range of 50-150 microg/ml, with 0.4-1.2J/cm2 light dose. PDT with Lonicera japonica extracts-induced cell death is a typical apoptosis that was accompanied by DNA condensation, externalization of phosphatidylserine and formation of apoptotic bodies. PDT with Lonicera japonica extracts was shown to be caspase-3-independent apoptosis via activation of AIF in this study. P38-associated pathway may be involved in apoptosis induced by PDT with Lonicera japonica extracts in CH27 cells. We also have demonstrated that PDT with Lonicera japonica extracts-induced CH27 cells apoptosis was probably related to its ability to change the protein expression and distribution of heat shock protein 27.
authors.affiliation: Department of Radiation Oncology, Chi Mei Hospital, Liouying, Tainan, Taiwan.
authors.forename: Henry W-C
authors.initials: HW
authors.lastname: Leung
authors.forename: M-J
authors.initials: MJ
authors.lastname: Hour
authors.forename: W-T
authors.initials: WT
authors.lastname: Chang
authors.forename: Y-C
authors.initials: YC
authors.lastname: Wu
authors.forename: M-Y
authors.initials: MY
authors.lastname: Lai
authors.forename: M-Y
authors.initials: MY
authors.lastname: Wang
authors.forename: H-Z
authors.initials: HZ
authors.lastname: Lee
mesh_terms: D000199:Actins / Q000378:metabolism; D017209:Apoptosis / Q000187:drug effects* / Q000502:physiology; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy*; D053148:Caspase 3 / Q000378:metabolism; D053181:Caspase 8 / Q000378:metabolism; D053453:Caspase 9 / Q000378:metabolism; D045744:Cell Line, Tumor; D004305:Dose-Response Relationship, Drug; D055551:HSP27 Heat-Shock Proteins; D006801:Humans; D031239:Lonicera / Q000737:chemistry*; D008175:Lung Neoplasms / Q000188:drug therapy*; D010778:Photochemotherapy / Q000379:methods*; D017319:Photosensitizing Agents / Q000627:therapeutic use*; D010936:Plant Extracts / Q000627:therapeutic use; D048051:p38 Mitogen-Activated Protein Kinases / Q000378:metabolism
chemical_list: D000199:Actins; D055551:HSP27 Heat-Shock Proteins; D017319:Photosensitizing Agents; D010936:Plant Extracts; D048051:p38 Mitogen-Activated Protein Kinases; D053148:Caspase 3; D053181:Caspase 8; D053453:Caspase 9