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Genetic events associated with arsenic-induced malignant transformation: Applications of cDNA microarray technology

TitoloGenetic events associated with arsenic-induced malignant transformation: Applications of cDNA microarray technology
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2001
AutoriPazzaglia, Simonetta, Mancuso Mariateresa, Primerano B., Rebessi S., Biozzi G., Covelli V., and Saran Anna
RivistaMolecular Carcinogenesis
Volume30
Paginazione79-87
ISSN08991987
Parole chiaveAnimalia, Animals, Apoptosis, arsenic, arsenite sodium, Arsenites, article, calculation, carcinogen, Cell Cycle Proteins, Cell Transformation, Cells, Complementary, complementary DNA, computer program, Computer-Assisted, Cultured, cytokine release, Cytokines, DNA, DNA Methylation, DNA microarray, DNA probe, DNA synthesis, Gene expression, gene expression profiling, genetic analysis, Genetic variability, growth hormone receptor, Growth Substances, Hepatocytes, housekeeping gene, Humans, hybridization, image processing, Inbred F344, malignant transformation, Moloney murine leukemia virus, Murinae, Neoplasm, Neoplasm Proteins, Neoplastic, Oligonucleotide Array Sequence Analysis, oncogene c jun, oncogene neu, oncogene ras, priority journal, Rats, RNA, s adenosylmethionine, signal transduction, Sodium compounds, statistical analysis, stress
Abstract

Arsenic is a human carcinogen. Our recent work showed that chronic (> 18wk), low-level (125-500 nM) arsenite exposure induces malignant transformation in normal rat liver cell line TRL1215. In these arsenic-transformed cells, the cellular S-adenosylmethionine pool was depleted from arsenic metabolism, resulting in global DNA hypomethylation. DNA methylation status in turn may affect the expression of a variety of genes. This study examined the aberrant gene expression associated with arsenic-induced transformation with the use of Atlas Rat cDNA Expression microarrays. Poly(A+) RNA was prepared from arsenic-transformed cells and passage-matched control cells, and 32P-labeled cDNA probes were synthesized with Clontech Rat cDNA Synthesis primers and moloney murine leukemia virus reverse transcriptase. The hybrid intensity was analyzed with AtlasImage software and normalized with the sum of the four housekeeping genes. Four hybridizations from separate cell preparations were performed, and mean and SEM for the expression of each gene were calculated for statistical analysis. Among the 588 genes, approximately 80 genes (∼13%) were aberrantly expressed. These included genes involved in cell-cycle regulation, signal transduction, stress response, apoptosis, cytokine production and growth-factor and hormone-receptor production and various oncogenes. These initial gene expression analyses for the first time showed potentially important aberrant gene expression patterns associated with arsenic-induced malignant transformation and set the stage for numerous further studies.

Note

cited By 107

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0035120212&doi=10.1002%2f1098-2744%28200102%2930%3a2%3c79%3a%3aAID-MC1016%3e3.0.CO%3b2-F&partnerID=40&md5=7380c2f6013d8c58fc47118a9a6114f2
DOI10.1002/1098-2744(200102)30:2<79::AID-MC1016>3.0.CO;2-F
Citation KeyPazzaglia200179