title: Detection of MRP1 mRNA in human tumors and tumor cell lines by in situ RT-PCR.
abstract: The detection of the multridrug resistance-associated proteins is becoming increasingly important in assessing tumor sensitivity to treatment. In this work we describe a new, rapid, sensitive, and robust method for the detection of MRP1 expression based on direct RT-in situ-PCR technology and fluorochrome-modified (dCTP(Cy3)) nucleotides. MRP1 expression was found in both placenta (BeWo) and liver (Hep G2)-derived tumor cell line as well as in small cell lung carcinoma. In liver-derived cells, MRP1 expression was detected by RT-in situ-PCR but not by in situ hybridization, suggesting a higher sensitivity of in situ amplification for the low level of expression in Hep G2 cells. RT solution PCR confirmed the presence of MRP1 in BeWo and Hep G2 cells, although the level of the gene expression was lower in liver cells. This method represents a viable alternative to conventional immunohistochemistry, and may be useful in the evaluation of MRP1 expression in different tissue or cell lines.
authors.affiliation: CSF-Department BBCM, University of Trieste, Via Giorgeri 1, Trieste, 34127, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Pascolo
authors.forename: C
authors.initials: C
authors.lastname: Fernetti
authors.forename: D
authors.initials: D
authors.lastname: Pirulli
authors.forename: S
authors.initials: S
authors.lastname: Bogoni
authors.forename: M V
authors.initials: MV
authors.lastname: Garcia-Mediavilla
authors.forename: A
authors.initials: A
authors.lastname: Spanò
authors.forename: D
authors.initials: D
authors.lastname: Puzzer
authors.forename: C
authors.initials: C
authors.lastname: Tiribelli
authors.forename: A
authors.initials: A
authors.lastname: Amoroso
authors.forename: S
authors.initials: S
authors.lastname: Crovella
mesh_terms: D001483:Base Sequence; D018288:Carcinoma, Small Cell / Q000235:genetics*; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000235:genetics*; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics*; D008175:Lung Neoplasms / Q000235:genetics*; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D000074081:MutS Homolog 3 Protein; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014407:Tumor Cells, Cultured
chemical_list: D017931:DNA Primers; D004268:DNA-Binding Proteins; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D000074081:MutS Homolog 3 Protein; D012333:RNA, Messenger; C078444:MSH3 protein, human; C421109:multidrug resistance-associated protein 1