Gene dosage alterations revealed by cDNA microarray analysis in cervical cancer: identification of candidate amplified and overexpressed genes - PubMed (original) (raw)
Veronique Bourdon, Seeta Chaganti, Hugo Arias-Pulido, Subhadra V Nandula, Pulivarthi H Rao, Lutz Gissmann, Matthias Dürst, Achim Schneider, Bhavana Pothuri, Mahesh Mansukhani, Katia Basso, R S K Chaganti, Vundavalli V Murty
Affiliations
- PMID: 17243165
- DOI: 10.1002/gcc.20418
Gene dosage alterations revealed by cDNA microarray analysis in cervical cancer: identification of candidate amplified and overexpressed genes
Gopeshwar Narayan et al. Genes Chromosomes Cancer. 2007 Apr.
Abstract
Cervical cancer (CC) cells exhibit complex karyotypic alterations, which is consistent with deregulation of numerous critical genes in its formation and progression. To characterize this karyotypic complexity at the molecular level, we used cDNA array comparative genomic hybridization (aCGH) to analyze 29 CC cases and identified a number of over represented and deleted genes. The aCGH analysis revealed at least 17 recurrent amplicons and six common regions of deletions. These regions contain several known tumor-associated genes, such as those involved in transcription, apoptosis, cytoskeletal remodeling, ion-transport, drug metabolism, and immune response. Using the fluorescence in situ hybridization (FISH) approach we demonstrated the presence of high-level amplifications at the 8q24.3, 11q22.2, and 20q13 regions in CC cell lines. To identify amplification-associated genes that correspond to focal amplicons, we examined one or more genes in each of the 17 amplicons by Affymetrix U133A expression arrays and semiquantitative reverse-transcription PCR (RT-PCR) in 31 CC tumors. This analysis exhibited frequent and robust upregulated expression in CC relative to normal cervix for genes EPHB2 (1p36), CDCA8 (1p34.3), AIM2 (1q22-23), RFC4, MUC4, and HRASLS (3q27-29), SKP2 (5p12-13), CENTD3 (5q31.3), PTK2, RECQL4 (8q24), MMP1 and MMP13 (11q22.2), AKT1 (14q32.3), ABCC3 (17q21-22), SMARCA4 (19p13.3) LIG1 (19q13.3), UBE2C (20q13.1), SMC1L1 (Xp11), KIF4A (Xq12), TMSNB (Xq22), and CSAG2 (Xq28). Thus, the gene dosage and expression profiles generated here have enabled the identification of focal amplicons characteristic for the CC genome and facilitated the validation of relevant genes in these amplicons. These data, thus, form an important step toward the identification of biologically relevant genes in CC pathogenesis. This article contains Supplementary Material available at http://www.interscience.wiley.com/jpages/1045-2257/suppmat.
(c) 2007 Wiley-Liss, Inc.
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