title: Lysine-orotate potentiates the toxicity of an extract of the mushroom Amanita phalloides.
abstract: Upon simultaneous administration lysine-orotate increases (about 40-fold) the toxicity in mice of a crude Amanita phalloides extract. This effect, though less prominent, is also observed if these two compounds are injected 1 hr apart. The potentiating effect of lysine-orotate is dose dependent and neither L-lysine nor orotic acid exert any effect on the toxicity of the crude A. phalloides extract. Lysine-orotate increases the toxicity of amatoxins (alpha-amanitin) only, not affecting the toxicity of phalloidins. Thin layer chromatography on silica gel plates and column chromatography on Sephadex LH-20 has proven the formation of a relatively stable complex of amanitin and lysine-orotate. The results demonstrate that lysine-orotate should not be used as a hepatoprotective agent in cases of Amanita intoxication.
mesh_terms: D000546:Amanitins / Q000378:metabolism / Q000633:toxicity*; D000818:Animals; D004357:Drug Synergism; D008239:Lysine / Q000633:toxicity*; D008297:Male; D051379:Mice; D009963:Orotic Acid / Q000633:toxicity*; D011485:Protein Binding
chemical_list: D000546:Amanitins; D009963:Orotic Acid; D008239:Lysine