title: Characterization of the ATP-binding cassette transporter gene expression profile in Y79: a retinoblastoma cell line.
abstract: Chemotherapy failure was reported in treatment of retinoblastoma suggesting a role for ATP-binding cassette (ABC) proteins. Little is known about the expression pattern of ABC proteins in this cancer type. We investigated the gene expression profile of 47 ABC proteins in the human retinoblastoma cell line Y79 by TaqMan low-density array. Analysis revealed 31 ABC transporter genes expressed in this tumor cell line. Y79 cells demonstrate high gene expression of ABCA7, ABCA12, ABCB7, ABCB10, ABCC1, ABCC4, ABCD3, ABCE1, ABCF1, ABCF2, and ABCF3 (more than twofold compared to pooled RNA from different tissues). Moreover, we show that Y79 cells exhibit an active calcein efflux pointing to multidrug resistance protein (MRP)-like transporter activity. In summary, we present for the first time an ABC transporter gene expression profile in cells derived from retinoblastoma. Most of the highly expressed ABC transporter genes are typical markers of cancer cells and might exhibit potential targets for medical treatment of retinoblastoma.
authors.affiliation: Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany.
authors.forename: Doris
authors.initials: D
authors.lastname: Hendig
authors.forename: Thomas
authors.initials: T
authors.lastname: Langmann
authors.forename: Ralf
authors.initials: R
authors.lastname: Zarbock
authors.forename: Gerd
authors.initials: G
authors.lastname: Schmitz
authors.forename: Knut
authors.initials: K
authors.lastname: Kleesiek
authors.forename: Christian
authors.initials: C
authors.lastname: Götting
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D045744:Cell Line, Tumor; D005452:Fluoresceins / Q000378:metabolism; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009363:Neoplasm Proteins / Q000235:genetics; D012175:Retinoblastoma / Q000378:metabolism* / Q000473:pathology
chemical_list: D018528:ATP-Binding Cassette Transporters; D005452:Fluoresceins; D009363:Neoplasm Proteins; C007740:fluorexon