title: pRB2/p130 target genes in non-small lung cancer cells identified by microarray analysis.
abstract: The retinoblastoma gene family consisting of RB/p105, p107, and RB2/p130 cooperate to regulate cell-cycle progression through the G1 phase of the cell cycle. Previous data demonstrated an independent role for the reduction or loss of pRb2/p130 expression in the formation and/or progression of lung carcinoma. Rb2/p130 is mutated in a human cell line of lung small cell carcinoma as well as in primary lung tumors. To identify potential pRb2/p130 target genes in an unbiased manner, we have utilized an adenovirus-mediated expression system of pRb2/p130 in a non-small lung cancer cell line to identify specific genes that are regulated by pRb2/p130. Using oligonucleotide arrays, a number of Rb2/p130 downregulated genes were identified and their regulation was confirmed by semiquantitative reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis. As a result, 40 genes showed greater than 2.0-fold modification in their expression level after the RB2/p130 viral transduction. In conclusion, coupling adenoviral overexpression with microarray and semiquantitative RT-PCR analyses proved to be a versatile strategy for identifying pRb2/p130 target genes and for better understanding the expression profiles of these genes. Our results may also contribute to identifying novel therapeutic biomarkers in lung carcinoma.
authors.affiliation: Sbarro Institute for Cancer Research and Molecular Medicine, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Russo
authors.forename: Pier Paolo
authors.initials: PP
authors.lastname: Claudio
authors.forename: Yan
authors.initials: Y
authors.lastname: Fu
authors.forename: Peter
authors.initials: P
authors.lastname: Stiegler
authors.forename: Zailin
authors.initials: Z
authors.lastname: Yu
authors.forename: Marcella
authors.initials: M
authors.lastname: Macaluso
authors.forename: Antonio
authors.initials: A
authors.lastname: Giordano
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics* / Q000473:pathology; D002460:Cell Line; D015972:Gene Expression Regulation, Neoplastic; D018390:Gene Targeting; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics* / Q000473:pathology; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D010750:Phosphoproteins / Q000235:genetics*; D011506:Proteins; D016160:Retinoblastoma Protein / Q000235:genetics*; D050717:Retinoblastoma-Like Protein p130
chemical_list: D010750:Phosphoproteins; D011506:Proteins; C493837:RBL2 protein, human; D016160:Retinoblastoma Protein; D050717:Retinoblastoma-Like Protein p130