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dc.contributor.authorJeng, Jiiang-Huei
dc.contributor.authorKuo, Mark Yen-Ping
dc.contributor.authorLee, Po-Hsuen
dc.contributor.authorWang, Ying-Jan
dc.contributor.authorLee, Mon-Ying
dc.contributor.authorLee, Jang-Jaer
dc.contributor.authorLin, Bor-Ru
dc.contributor.authorTai, Tseng-Fang
dc.contributor.authorChang, Mei-Chi
dc.date.accessioned2009-03-27T11:27:40Z
dc.date.available2009-03-27T11:27:40Z
dc.date.issued2006-06-15
dc.identifier.citationToxicology 2006, 223 (3):235-247en
dc.identifier.issn0300-483X
dc.identifier.pmid16737765
dc.identifier.doi10.1016/j.tox.2006.04.033
dc.identifier.urihttp://hdl.handle.net/10146/57573
dc.descriptionLifestyle element evaluated: sodium butyrate. Outcome studied: toxic effect of sodium butyrate (cell cycle arrest, apoptosis and growth inhibition) in SAS tongue cancer cells; sodium butyrate-induced ROS production in SAS tongue cancer cells. Method of biomarker analysis: toxic effect of sodium butyrate on SAS cancer cells (growth of SAS cancer cells, cell cycle progression of SAS cancer cells); ROS production (Reactive oxygen species scavenging properties of sodium butyrate, effect of sodium butyrate on GSH and ROS levels in SAS cancer cells)Study type: Human tongue cancer cell line SAS Quality control: More than four separate experiments were performed for each test.Impact on outcome: Sodium butyrate inhibited the growth of SAS tongue cancer cells by 32% and 53% at concentrations of 1 and 2mM, respectively. Low concentrations of sodium butyrate (1-8mM) induced G0/G1 cell cycle arrest of SAS cells, whereas concentrations of 4-16 mM elicited G2/M arrest and a slight increase in apoptotic cell populations. These events were concomitant with induction of intracellular reactive oxygen species (ROS) production. An elevation in p21 mRNA and protein level was noted in SAS cells by sodium butyrate. On the contrary, a decline of cyclin Bl, cdc2 and cdc25C mRNA and protein expression in SAS cells was found after exposure to sodium butyrate. In addition, no evident increase in cdc2 inhibitory phosphorylation was found in sodium butyrate-treated SAS cancer cells. Inclusion of N-acetyl-l-cysteine (NAC) (3mM), catalase (1000 U/ml) and dimethylthiourea (DMT, 5mM), and also SOD (500 U/ml) attenuated the sodium butyrate-induced ROS production in SAS cells. However, they were not able to prevent the cell cycle arrest, apoptosis and growth inhibition in SAS cells induced by 1, 2 and 16 mM of sodium butyrate. KEYWORDS - CLASIFFICATION: analysis;Apoptosis;Butyrates;Cell Cycle;Cell Cycle Proteins;Cell Line,Tumor;drug effects;Free Radical Scavengers;Gene Expression;genetics;Human;Humans;lifestyle modulation of cancer & cancer biomarkers;mechanisms of carcinogenesis;metabolism;Oxidation-Reduction;pathology;pharmacology;Proteins;Reactive Oxygen Species;Research;Sodium;Taiwan;Tongue Neoplasms;Toxicology;en
dc.description.abstractButyrate is a metabolite produced by oral and colonic microorganism. Butyrate has been shown to reduce colon cancer, whereas its role in oral carcinogenesis is not clear. Butyrate concentration in dental plaque and saliva ranged from 0.2 to 16 mM. In this study, we found that sodium butyrate inhibited the growth of SAS tongue cancer cells by 32% and 53% at concentrations of 1 and 2mM, respectively. Low concentrations of sodium butyrate (1-8mM) induced G0/G1 cell cycle arrest of SAS cells, whereas concentrations of 4-16 mM elicited G2/M arrest and a slight increase in apoptotic cell populations. These events were concomitant with induction of intracellular reactive oxygen species (ROS) production. An elevation in p21 mRNA and protein level was noted in SAS cells by sodium butyrate. On the contrary, a decline of cyclin Bl, cdc2 and cdc25C mRNA and protein expression in SAS cells was found after exposure to sodium butyrate. In addition, no evident increase in cdc2 inhibitory phosphorylation was found in sodium butyrate-treated SAS cancer cells. Inclusion of N-acetyl-l-cysteine (NAC) (3mM), catalase (1000 U/ml) and dimethylthiourea (DMT, 5mM), and also SOD (500 U/ml) attenuated the sodium butyrate-induced ROS production in SAS cells. However, they were not able to prevent the cell cycle arrest, apoptosis and growth inhibition in SAS cells induced by 1, 2 and 16 mM of sodium butyrate. These results indicate that sodium butyrate is toxic and inhibits the tongue cancer cell growth via induction of cell cycle arrest and apoptosis. Sodium butyrate mediates these events by mechanisms additional to ROS production.
dc.language.isoenen
dc.relation.urlhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TCN-4JTPM8R-B&_user=1843694&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000055040&_version=1&_urlVersion=0&_userid=1843694&md5=c437c2f377737806f91bbf75cddf1089en
dc.subjectAntioxidantsen
dc.subjectApoptosisen
dc.subjectButyrateen
dc.subjectCell cycleen
dc.subjectCytotoxicityen
dc.subjectReactive oxygen speciesen
dc.subject.meshApoptosis
dc.subject.meshButyrates
dc.subject.meshCell Cycle
dc.subject.meshCell Cycle Proteins
dc.subject.meshCell Line, Tumor
dc.subject.meshFree Radical Scavengers
dc.subject.meshGene Expression
dc.subject.meshHumans
dc.subject.meshOxidation-Reduction
dc.subject.meshReactive Oxygen Species
dc.subject.meshTongue Neoplasms
dc.titleToxic and metabolic effect of sodium butyrate on SAS tongue cancer cells: role of cell cycle deregulation and redox changes.en
dc.typeArticleen
dc.identifier.journalToxicologyen
html.description.abstractButyrate is a metabolite produced by oral and colonic microorganism. Butyrate has been shown to reduce colon cancer, whereas its role in oral carcinogenesis is not clear. Butyrate concentration in dental plaque and saliva ranged from 0.2 to 16 mM. In this study, we found that sodium butyrate inhibited the growth of SAS tongue cancer cells by 32% and 53% at concentrations of 1 and 2mM, respectively. Low concentrations of sodium butyrate (1-8mM) induced G0/G1 cell cycle arrest of SAS cells, whereas concentrations of 4-16 mM elicited G2/M arrest and a slight increase in apoptotic cell populations. These events were concomitant with induction of intracellular reactive oxygen species (ROS) production. An elevation in p21 mRNA and protein level was noted in SAS cells by sodium butyrate. On the contrary, a decline of cyclin Bl, cdc2 and cdc25C mRNA and protein expression in SAS cells was found after exposure to sodium butyrate. In addition, no evident increase in cdc2 inhibitory phosphorylation was found in sodium butyrate-treated SAS cancer cells. Inclusion of N-acetyl-l-cysteine (NAC) (3mM), catalase (1000 U/ml) and dimethylthiourea (DMT, 5mM), and also SOD (500 U/ml) attenuated the sodium butyrate-induced ROS production in SAS cells. However, they were not able to prevent the cell cycle arrest, apoptosis and growth inhibition in SAS cells induced by 1, 2 and 16 mM of sodium butyrate. These results indicate that sodium butyrate is toxic and inhibits the tongue cancer cell growth via induction of cell cycle arrest and apoptosis. Sodium butyrate mediates these events by mechanisms additional to ROS production.


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