title: New phenylpropane and anti-inflammatory diterpene derivatives from Amentotaxus formosana.
abstract: One new diterpene, 8(14),15-sandaracopimaradiene-2alpha,3beta,18-triol (1), two new phenylpropane derivatives, i.e., (E)-methyl 2-(3,4-methylene-dioxyphenyl)-3-methoxypropenoate (2) and (E)-2-(3,4-methylene-dioxyphenyl)-3-methoxypropenoic acid (3), and two known diterpenes, ent-8(14),15-sandaracopimaradiene-2alpha,18-diol (4) and 8(14),15-sandaracopimaradiene-2alpha,18,19-triol (5), were isolated from the heartwoods and barks of Amentotaxus formosana, respectively. The anti-inflammatory activity of the diterpenes 1, 4, and 5 was assessed in vitro by determining their inhibitory effects on the chemical mediators released from mast cells, neutrophils, macrophages, and microglial cells. Compounds 1, 4, and 5 showed significant concentration-dependent inhibitory effects on the release of beta-glucuronidase from rat neutrophils in response to formyl-Met-Leu-Phe/cytochalasin B (fMLP/CB) with IC50 values of 5.5 +/- 1.8, 8.4 +/- 2.9 and 19.2 +/- 3.3 microM, respectively. Compounds 1 and 5 also showed significant concentration-dependent inhibitory effects on superoxide anion generation in rat neutrophils stimulated with fMLP/CB and phorbol 12-myristate 13-acetate (PMA) with IC50 values of 12.6 +/- 1.2 and 9.4 +/- 1.7, and 10.7 +/- 3.3 and 12.9 +/- 0.9 microM, respectively.
authors.affiliation: School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan, Republic of China.
authors.forename: Li-Wen
authors.initials: LW
authors.lastname: Wang
authors.forename: Huey-Jen
authors.initials: HJ
authors.lastname: Su
authors.forename: Shiow-Hwa
authors.initials: SH
authors.lastname: Day
authors.forename: Lo-Ti
authors.initials: LT
authors.lastname: Tsao
authors.forename: Sheng-Zehn
authors.initials: SZ
authors.lastname: Yang
authors.forename: Jih-Pyang
authors.initials: JP
authors.lastname: Wang
authors.forename: Chun-Nan
authors.initials: CN
authors.lastname: Lin
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D004224:Diterpenes / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D006841:Hydrocarbons, Aromatic / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D020128:Inhibitory Concentration 50; D008264:Macrophages / Q000187:drug effects / Q000378:metabolism; D008407:Mast Cells / Q000187:drug effects / Q000378:metabolism; D051379:Mice; D009457:Neuroglia / Q000187:drug effects / Q000378:metabolism; D009504:Neutrophils / Q000187:drug effects / Q000378:metabolism; D008517:Phytotherapy; D024301:Plant Bark; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D051381:Rats; D017207:Rats, Sprague-Dawley; D032490:Taxaceae; D014934:Wood
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D004224:Diterpenes; D006841:Hydrocarbons, Aromatic; D010936:Plant Extracts