Identification of compounds from Paris polyphylla (ChongLou) active against Dactylogyrus intermedius

• Published in: Parasitology Vol. 140; no. 8; pp. 952 - 958
• Main Authors: LI, ZE-HONG, WAN, JIA-YU, WANG, GUI-QIN, ZHAO, FU-GUANG, WEN, JI-HONG
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.07.2013
• Subjects: Animals; Anthelmintics - chemistry; Anthelmintics - isolation & purification; Anthelmintics - pharmacology; Anthelmintics - toxicity; Aquaculture; Biological Assay - veterinary; Carps; Diosgenin - analogs & derivatives; Diosgenin - chemistry; Diosgenin - isolation & purification; Diosgenin - pharmacology; Diosgenin - toxicity; Fish Diseases - drug therapy; Fish Diseases - parasitology; Helminthiasis, Animal - drug therapy; Helminthiasis, Animal - parasitology; Magnoliopsida - chemistry; Medicine, Chinese Traditional; Methanol - chemistry; Parasitic Sensitivity Tests - veterinary; Plant Extracts - chemistry; Plant Extracts - isolation & purification; Plant Extracts - pharmacology; Plants, Medicinal - chemistry; Platyhelminths - drug effects; Rhizome - chemistry; Saponins - adverse effects; Saponins - chemistry; Saponins - isolation & purification; Saponins - pharmacology; Saponins - toxicity; formosanin C; anthelmintic; Dactylogyrus intermedius; Paris polyphylla; polyphyllin VII
• ISSN: 0031-1820; 1469-8161; 1469-8161
• DOI: 10.1017/S0031182013000139

The present study was designated to ascertain the anthelmintic activity of the rhizomes of Paris polyphylla and to isolate and characterize the active constituents. The methanol extract from rhizomes of P. polyphylla showed significant anthelmintic activity against Dactylogyrus intermedius with the median effective concentration (EC50) 22·5 mg L−1. Based on this finding, the methanol extract was fractionated by silica gel column chromatography in a bioassay-guided fractionation yielding 2 bioactive compounds, the structures of these compounds were elucidated as formosanin C and polyphyllin VII. The in vivo tests revealed that formosanin C and polyphyllin VII were significantly effective against D. intermedius with EC50 values of 0·6 and 1·2 mg L−1, respectively. The acute toxicities (LC50) of formosanin C and polyphyllin VII for grass carp were 2·8 and 2·9 mg L−1, respectively. The overall results provide important information for the potential application of formosanin C and polyphyllin VII in the therapy of serious infection caused by D. intermedius.