title: Antitumor effects of Marginisporum crassissimum (Rhodophyceae), a marine red alga.
abstract: Marginisporum crassissimum (Yendo) Ganesan, a marine red alga found in the ordinal coastal sea around Japan, revealed antitumor (antimetastatic) effects in vitro and in vivo. In in vitro experiments, extracts of this alga inhibited not only the growth of several tumor cell lines, such as B16-BL6 (a mouse melanoma cell line), JYG-B (a mouse mammary carcinoma cell line) and KPL-1 (a human mammary carcinoma cell line), but also invasion of B16-BL6 cells in a culture system. In in vivo experiments, the lung metastasis of B16-BL6 cells inoculated to the tail vein of B57BL/6J mice was inhibited by intraperitoneal administration of an extract from the alga. In addition, life prolongation of B57BL/6J mice inoculated with B16-BL6 cells was also observed by the intraperitoneal administration of the extract. An effective substance showing B16-BL6 growth inhibition in vitro was partially purified by filtration and hydrophobic column chromatography, and was revealed to be sensitive to trypsin-digestion and heat-treatment. The molecular weight of the substance was greater than 100 kDa. This is the first study demonstrating antitumor (antimetastatic) effects of M. crassissimum.
authors.affiliation: Faculty of Biotechnology, Fukui Prefectural University, 1-1 Gakuen-cho, Obama, Fukui 917-0003, Japan. hiroishi@fpu.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Hiroishi
authors.forename: K
authors.initials: K
authors.lastname: Sugie
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: J
authors.initials: J
authors.lastname: Morimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Taniguchi
authors.forename: S
authors.initials: S
authors.lastname: Imai
authors.forename: J
authors.initials: J
authors.lastname: Kurebayashi
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology* / Q000627:therapeutic use; D002455:Cell Division / Q000187:drug effects; D004195:Disease Models, Animal; D004355:Drug Stability; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary; D008546:Melanoma, Experimental / Q000188:drug therapy / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D009368:Neoplasm Transplantation; D010936:Plant Extracts / Q000494:pharmacology / Q000627:therapeutic use; D000461:Rhodophyta / Q000737:chemistry*; D016896:Treatment Outcome; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D010936:Plant Extracts