title: Combined system for the simultaneous optical and electrochemical monitoring of intra- and extracellular NO produced by glioblastoma cells.
abstract: A combined, optospectroscopic and electrochemical assay system for the simultaneous monitoring of intra- and extracellular production of biologically important species has been developed and assessed. The present model system evaluates intra- and extracellular nitric oxide produced by stimulated glioblastoma multiform cell line (A172). The production of endogenous NO was induced by phorbol-12-myristate-13-acetate and inhibited by N(omega)-nitro-l-arginine methyl ester. Intracellular production of NO was monitored via fluorescence image analysis using a 4,5-diaminofluorescein probe, while extracellular NO release was monitored via a chemically modified electrode, which was incorporated into an optically transparent cell chip. The results indicated that there was no mutual interference between the optical and electrochemical measurement systems. The response time of the combined optical/electrochemical system was found to be in the range of a few tens of seconds.
authors.affiliation: Laboratoire de Pharmacologie Chimique et Génétique, Ecole Nationale Supérieure de Chimie de Paris, UMR CNRS 8151/U INSERM 640, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France.
authors.forename: Nazaré
authors.initials: N
authors.lastname: Pereira-Rodrigues
authors.forename: Naomi
authors.initials: N
authors.lastname: Zurgil
authors.forename: Seung-Cheol
authors.initials: SC
authors.lastname: Chang
authors.forename: James R
authors.initials: JR
authors.lastname: Henderson
authors.forename: Fethi
authors.initials: F
authors.lastname: Bedioui
authors.forename: Calum J
authors.initials: CJ
authors.lastname: McNeil
authors.forename: Mordechai
authors.initials: M
authors.lastname: Deutsch
mesh_terms: D045744:Cell Line, Tumor; D004563:Electrochemistry / Q000379:methods*; D005909:Glioblastoma / Q000378:metabolism*; D006801:Humans; D008856:Microscopy, Fluorescence / Q000379:methods*; D019331:NG-Nitroarginine Methyl Ester / Q000494:pharmacology; D009569:Nitric Oxide / Q000032:analysis / Q000096:biosynthesis*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D009569:Nitric Oxide; D013755:Tetradecanoylphorbol Acetate; D019331:NG-Nitroarginine Methyl Ester