title: Suppressive activity of lycoricidinol (narciclasine) against cytotoxicity of neutrophil-derived calprotectin, and its suppressive effect on rat adjuvant arthritis model.
abstract: Calprotectin is a calcium- and zinc-binding protein complex that is abundant in cytosol of neutrophils. The concentration of calprotectin in extracellular fluids is greatly increased under various inflammatory conditions in vivo. We recently demonstrated that calprotectin inhibited cell growth and induced apoptosis of various cell types including tumor cells and normal fibroblasts; therefore, extracellular calprotectin might cause tissue destruction in severe inflammatory diseases. We previously found that an alkaloid, lycorine inhibits induction of apoptosis by calprotectin. In this paper, we examined the inhibitory activities of other Amaryllidaceae alkaloids, namely, lycoricidinol, hippeastrine and ungerine against the cytotoxicity of calprotectin. Lycoricidinol (narciclasine) inhibited calprotectin-induced cytotoxicity at more than 10-fold lower concentration (IC50=0.001-0.01 microg/ml) than lycorine, while the effects of the latter two alkaloids were very weak. Therefore, we next checked the prophylactic effect of lycorine and lycoricidinol on the adjuvant arthritis model in rats. Lycoricidinol, but not lycorine, significantly suppressed the degree of swelling of adjuvant-treated as well as untreated feet, suggesting that lycoricidinol might be a candidate as a the drug having marked suppressive activity for inflammation which might be influenced by calprotectin.
authors.affiliation: Faculty of Pharmaceutical Sciences, Teikyo University, Kanagawa, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Mikami
authors.forename: M
authors.initials: M
authors.lastname: Kitahara
authors.forename: M
authors.initials: M
authors.lastname: Kitano
authors.forename: Y
authors.initials: Y
authors.lastname: Ariki
authors.forename: Y
authors.initials: Y
authors.lastname: Mimaki
authors.forename: Y
authors.initials: Y
authors.lastname: Sashida
authors.forename: M
authors.initials: M
authors.lastname: Yamazaki
authors.forename: S
authors.initials: S
authors.lastname: Yui
mesh_terms: D000470:Alkaloids / Q000494:pharmacology* / Q000627:therapeutic use; D047151:Amaryllidaceae Alkaloids; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology* / Q000627:therapeutic use; D001169:Arthritis, Experimental / Q000517:prevention & control*; D002455:Cell Division / Q000187:drug effects; D004195:Disease Models, Animal; D004347:Drug Interactions; D039841:Leukocyte L1 Antigen Complex; D019684:Magnoliopsida / Q000737:chemistry; D008297:Male; D008562:Membrane Glycoproteins / Q000494:pharmacology*; D051379:Mice; D008809:Mice, Inbred C3H; D019006:Neural Cell Adhesion Molecules / Q000494:pharmacology*; D009504:Neutrophils / Q000378:metabolism; D010617:Phenanthridines / Q000627:therapeutic use; D008517:Phytotherapy; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000470:Alkaloids; D047151:Amaryllidaceae Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D039841:Leukocyte L1 Antigen Complex; D008562:Membrane Glycoproteins; D019006:Neural Cell Adhesion Molecules; D010617:Phenanthridines; D011500:Protein Synthesis Inhibitors; C010753:narciclasine; C015330:lycorine