title: Quercetin protects human mesothelial cells against exposure to peritoneal dialysis fluid.
abstract: During peritoneal dialysis, mesothelial cells have been shown to undergo severe damage due to continuous exposure to peritoneal dialysis fluid (PDF) with cytotoxic physicochemical properties. In this study, we investigated the cytoprotective role of the bioflavonoid Quercetin in the in vitro model of peritoneal dialysis. Immortalized human mesothelial cells (Met5A) were exposed either to regular growth medium or to standard acidic lactate-buffered PDF (Dianeal PD4) or to a more biocompatible lactate-bicarbonate-buffered PDF (Physioneal 40). Parallel cell cultures were supplemented with 200 microM Quercetin. Cytotoxicity was assessed qualitatively by morphologic assessment and quantitatively by the release of cytoplasmic lactate dehydrogenase and fluorescence-activated cell sorting (FACS). PDF exposure with bioincompatible Dianeal PD4 resulted in severe disruption of cell cultures and in significantly increased lactate dehydrogenase (LDH) release (p=0.0007 vs. control). Addition of 200 microM Quercetin significantly decreased the LDH release (p=0.04 vs. "pure" Dianeal PD4 exposure), comparable to control exposure and to more biocompatible Physioneal 40 exposure (p=0.37) and resulted in marked preservation of cell culture monolayers and cellular viability as assessed by FACS. Introduction of cytoprotective agents such as Quercetin may represent an alternate approach to protect mesothelial cells from cytotoxicity of frequently used PDFs, comparably effective to the introduction of novel, more biocompatible, PDFs.
authors: Department of Pediatrics, Medical University of Vienna, Kinderdialyse, Universitaetsklinik fuer Kinder-und Jugendheilkunde, Waehringer Guertel 18-20, 1090, Wien, Austria.
authors: Andrea
authors: A
authors: Riesenhuber
authors: David C
authors: DC
authors: Kasper
authors: Regina
authors: R
authors: Vargha
authors: Michaela
authors: M
authors: Endemann
authors: Christoph
authors: C
authors: Aufricht
mesh_terms: D018929:Cell Culture Techniques; D002461:Cell Line, Transformed; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003470:Culture Media / Q000378:metabolism; D019610:Cytoprotection / Q000187:drug effects; D015314:Dialysis Solutions / Q000494:pharmacology*; D004847:Epithelial Cells / Q000187:drug effects / Q000502:physiology; D006801:Humans; D007770:L-Lactate Dehydrogenase / Q000032:analysis; D018301:Neoplasms, Mesothelial / Q000378:metabolism*; D010530:Peritoneal Dialysis; D010997:Pleural Neoplasms / Q000378:metabolism*; D011794:Quercetin / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D003470:Culture Media; D015314:Dialysis Solutions; D011794:Quercetin; D007770:L-Lactate Dehydrogenase