Abstract 3913: Establishing a genomic profile of four gastric carcinoma cell lines using array CGH, FISH and cytogenetic analyses

Proceedings: AACR 102nd Annual Meeting 2011‐‐ Apr 2‐6, 2011; Orlando, FL Four gastric carcinoma cell lines (CRL-1739TM, CRL-5822TM, CRL-5971TM and CRL-5973TM), established in the 1970s and 1980s, were purchased from ATCC. These cell lines have been distributed throughout the world and are regularly used for biomedical research. Cytogenetic information is available for three of these cell lines, and two of the three are known to have complex chromosomal rearrangements, though these have not been well characterized. In part, this is due to the complexity of chromosomal changes and the limited ability of G-banded chromosome analysis. Establishing a genomic profile of these cell lines is vitally important, so that their genotypes and phenotypes can be compared. In the current study, G-banded chromosome analysis, array CGH and FISH analyses were performed on these 4 cell lines. The G-banded chromosome analysis was performed and followed by array CGH using 720k oligonucleotide based array chip. The imbalanced regions and chromosome rearrangements, detected by G-banded chromosome and array CGH analyses, were confirmed by FISH using the appropriate DNA probes. Based on the combined data generated by these assays, we established genomic profiles of each cell line; deletions, duplications, translocations and insertions and a chromosomal homogenous staining region. Deletions of 3p and 18q, duplication of 8q, 19q and extra chromosome 20 were found to be common. These findings are consistent with array CGH analyses of fresh gastric tumor samples (data to be presented separately). The results of this study are important as they will provide important information on the status of genomic profiles, allow the expression patterns of gene(s) to be compared, and provide a mechanism for monitoring the genomic changes in these cell lines. This information, we believe, will allow laboratories to make more informed decisions about the need for replacing existing cell lines due to changes in their biological characteristics. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 3913. doi:10.1158/1538-7445.AM2011-3913