title: The anticancer effect of protein-extract from Bidens alba in human colorectal carcinoma SW480 cells via the reactive oxidative species- and glutathione depletion-dependent apoptosis.
abstract: Bidens alba has been used for healing cuts, injuries, swellings, hypertension, jaundice, and diabetes in some countries. However, the effect of B. alba on human cancer remains poorly understood. The goal of this study was to investigate whether B. alba protein-extract could have an anticancer property against human colorectal cancer. The human colorectal cancer SW 480 cells treated with the protein-extract of B. alba would cause marked DNA damages and apoptosis-related cellular morphologies. Treatment with 225 microg/ml B. alba protein-extract also led to the SW480 cells to produce readily intracellular reactive oxygen species (ROS) after 1h of treatment and last to 24 h. The intracellular glutathione (GSH) depletion occurred after 12-24h of treatment. The treatment of the protein-extract would also caused mitochondrial transmembrane potential (DeltaPsi(m)) to decrease and cytosolic cytochrome c to increase. The caspase 3/7 activities were activated from 3 to 6 h after the treatment. The percentages of apoptosis induced by the protein-extract of B. alba decreased 26.4%, 10.1%, and 29.4% when the SW 480 cells were pretreated with Vitamin C, N-acetylcysteine, and Boc-Asp(OMe)-fmk, respectively. Taken together, we demonstrated for the first time that the protein-extract of B. alba could induce apoptosis that was related to the ROS production and GSH depletion in human colorectal cancer. The protein-extract of B. alba might have therapeutic value against the human colorectal cancer.
authors.affiliation: Department of Biochemical Science and Technology, College of Life Sciences, National Chiayi University, Chiayi, Taiwan.
authors.forename: Ping-Lin
authors.initials: PL
authors.lastname: Ong
authors.forename: Bor-Chun
authors.initials: BC
authors.lastname: Weng
authors.forename: Fung-Jou
authors.initials: FJ
authors.lastname: Lu
authors.forename: Miao-Ling
authors.initials: ML
authors.lastname: Lin
authors.forename: Ting-Ting
authors.initials: TT
authors.lastname: Chang
authors.forename: Ray-Ping
authors.initials: RP
authors.lastname: Hung
authors.forename: Ching-Hsein
authors.initials: CH
authors.lastname: Chen
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D031176:Bidens / Q000737:chemistry*; D020169:Caspases / Q000502:physiology; D002452:Cell Count; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000473:pathology; D045304:Cytochromes c / Q000378:metabolism; D003600:Cytosol / Q000187:drug effects / Q000201:enzymology; D005434:Flow Cytometry; D005978:Glutathione / Q000502:physiology*; D006801:Humans; D020287:In Situ Nick-End Labeling; D007202:Indicators and Reagents; D008928:Mitochondria / Q000187:drug effects; D010936:Plant Extracts / Q000494:pharmacology; D010940:Plant Proteins / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism; D013778:Tetrazolium Salts; D013844:Thiazoles
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D007202:Indicators and Reagents; D010936:Plant Extracts; D010940:Plant Proteins; D017382:Reactive Oxygen Species; D013778:Tetrazolium Salts; D013844:Thiazoles; D045304:Cytochromes c; D013482:Superoxide Dismutase; D020169:Caspases; C022616:thiazolyl blue; D005978:Glutathione