title: Synergistic cytotoxicity of acidity and 3,4-Dideoxyglucosone-3-ene under the existence of lactate in peritoneal dialysis fluid.
abstract: Of the non-physiological compounds in glucose-rich peritoneal dialysis fluid, we investigated the synergistic cytotoxicity of acidity and 3,4-Dideoxyglucosone-3-ene(3,4-DGE) under the existence of lactate using human peritoneal mesothelial cells (HPMC). The effect of pH on cell viability at various levels of pH (5.5, 6.7, 7.15), with or without lactate was examined by adding 1N-HCl to phosphate buffer solution. We also examined the cytotoxic effects of 3,4-DGE and pH (5.5, 6.7 or 7.15). Additionally, we compared the cytotoxic effects of 3,4-DGE and pH (5.5, 6.7 or 7.15) under existence of lactate (40 meq/L) or absence of lactate. The cells were exposed to these solutions for 2 or 4 h. Cell viability was determined by MTT (3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenylterazolium bromide) assay. 3,4-DGE or acidic solution alone had no significant effects on MTT viability under the absence of lactate. However, acidic solutions containing 3,4-DGE significantly decreased MTT viability under the existence of lactate. The MTT viability of HPMC was not decreased by 3,4-DGE or acidity alone under the absence of lactate. However, the combination of acidity and 3,4-DGE markedly decreased MTT viability under the existence of lactate, strongly suggesting the synergistic cytotoxicity of 3,4-DGE and acidity under the existence of lactate.
authors.affiliation: Second Department of Internal Medicine, Faculty of Medicine, Oita University, Oita, Japan. tomo@med.oita-u.ac.jp
authors.forename: Tadashi
authors.initials: T
authors.lastname: Tomo
authors.forename: Eiji
authors.initials: E
authors.lastname: Okabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Shinji
authors.initials: S
authors.lastname: Namoto
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Iwashita
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Matsuyama
authors.forename: Jyunichi
authors.initials: J
authors.lastname: Kadota
authors.forename: Masaru
authors.initials: M
authors.lastname: Nasu
mesh_terms: D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D015314:Dialysis Solutions / Q000737:chemistry / Q000494:pharmacology; D004357:Drug Synergism; D004847:Epithelial Cells / Q000187:drug effects; D005947:Glucose / Q000494:pharmacology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000494:pharmacology*; D010530:Peritoneal Dialysis; D010537:Peritoneum / Q000166:cytology / Q000187:drug effects; D011753:Pyrones / Q000494:pharmacology*; D013997:Time Factors
chemical_list: C504711:3,4-dideoxyglucosone-3-ene; D015314:Dialysis Solutions; D011753:Pyrones; D019344:Lactic Acid; D005947:Glucose