CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors
Multiple regions of the genome are often amplified during breast cancer development and progression, as evidenced in a number of published studies by comparative genomic hybridization (CGH). However, only relatively few target genes for such amplifications have been identified. Here, we indicate how...
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| Format: | Article |
| Language: | English |
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Wiley
2001-01-01
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| Series: | Analytical Cellular Pathology |
| Online Access: | http://dx.doi.org/10.1155/2001/981218 |
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| author | Mervi Heiskanen Juha Kononen Maarit Bärlund Joachim Torhorst Guido Sauter Anne Kallioniemi Olli Kallioniemi |
| author_facet | Mervi Heiskanen Juha Kononen Maarit Bärlund Joachim Torhorst Guido Sauter Anne Kallioniemi Olli Kallioniemi |
| author_sort | Mervi Heiskanen |
| collection | DOAJ |
| description | Multiple regions of the genome are often amplified during breast cancer development and progression, as evidenced in a number of published studies by comparative genomic hybridization (CGH). However, only relatively few target genes for such amplifications have been identified. Here, we indicate how small‐scale commercially available cDNA and CGH microarray formats combined with the tissue microarray technology enable rapid identification of putative amplification target genes as well as analysis of their clinical significance. According to CGH, the SUM‐52 breast cancer cell line harbors several high‐level DNA amplification sites, including the 10q26 chromosomal region where the fibroblast growth factor receptor 2 (FGFR2) gene has been localized. High level amplification of FGFR2 in SUM‐52 was identified using CGH analysis on a microarray of BAC clones. A cDNA microarray survey of 588 genes showed >40‐fold overexpression of FGFR2. Finally, a tissue microarray based FISH analysis of 750 uncultured primary breast cancers demonstrated in vivo amplification of the FGFR2 gene in about 1% of the tumors. In conclusion, three consecutive microarray (CGH, cDNA and tissue) experiments revealed high‐level amplification and overexpression of the FGFR2 in a breast cancer cell line, but only a low frequency of involvement in primary breast tumors. Applied to a genomic scale with larger arrays, this strategy should facilitate identification of the most important target genes for cytogenetic rearrangements, such as DNA amplification sites detected by conventional CGH. Figures on http://www.esacp.org/acp/2001/22‐4/heiskanen.htm |
| format | Article |
| id | doaj-art-ecb7ac45e26341738d534206107b7958 |
| institution | Kabale University |
| issn | 0921-8912 1878-3651 |
| language | English |
| publishDate | 2001-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Analytical Cellular Pathology |
| spelling | doaj-art-ecb7ac45e26341738d534206107b79582025-02-03T01:02:51ZengWileyAnalytical Cellular Pathology0921-89121878-36512001-01-0122422923410.1155/2001/981218CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast TumorsMervi Heiskanen0Juha Kononen1Maarit Bärlund2Joachim Torhorst3Guido Sauter4Anne Kallioniemi5Olli Kallioniemi6Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 49 Convent Drive MSC 4470, Room 4A15, Bethesda, MD 20892‐4470, USACancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 49 Convent Drive MSC 4470, Room 4A15, Bethesda, MD 20892‐4470, USALaboratory of Cancer Genetics, Institute of Medical Technology, University of Tampere and Tampere University Hospital, 33521 Tampere, FinlandInstitute of Pathology, University of Basel, SwitzerlandInstitute of Pathology, University of Basel, SwitzerlandCancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 49 Convent Drive MSC 4470, Room 4A15, Bethesda, MD 20892‐4470, USACancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 49 Convent Drive MSC 4470, Room 4A15, Bethesda, MD 20892‐4470, USAMultiple regions of the genome are often amplified during breast cancer development and progression, as evidenced in a number of published studies by comparative genomic hybridization (CGH). However, only relatively few target genes for such amplifications have been identified. Here, we indicate how small‐scale commercially available cDNA and CGH microarray formats combined with the tissue microarray technology enable rapid identification of putative amplification target genes as well as analysis of their clinical significance. According to CGH, the SUM‐52 breast cancer cell line harbors several high‐level DNA amplification sites, including the 10q26 chromosomal region where the fibroblast growth factor receptor 2 (FGFR2) gene has been localized. High level amplification of FGFR2 in SUM‐52 was identified using CGH analysis on a microarray of BAC clones. A cDNA microarray survey of 588 genes showed >40‐fold overexpression of FGFR2. Finally, a tissue microarray based FISH analysis of 750 uncultured primary breast cancers demonstrated in vivo amplification of the FGFR2 gene in about 1% of the tumors. In conclusion, three consecutive microarray (CGH, cDNA and tissue) experiments revealed high‐level amplification and overexpression of the FGFR2 in a breast cancer cell line, but only a low frequency of involvement in primary breast tumors. Applied to a genomic scale with larger arrays, this strategy should facilitate identification of the most important target genes for cytogenetic rearrangements, such as DNA amplification sites detected by conventional CGH. Figures on http://www.esacp.org/acp/2001/22‐4/heiskanen.htmhttp://dx.doi.org/10.1155/2001/981218 |
| spellingShingle | Mervi Heiskanen Juha Kononen Maarit Bärlund Joachim Torhorst Guido Sauter Anne Kallioniemi Olli Kallioniemi CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors Analytical Cellular Pathology |
| title | CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors |
| title_full | CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors |
| title_fullStr | CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors |
| title_full_unstemmed | CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors |
| title_short | CGH, cDNA and Tissue Microarray Analyses Implicate FGFR2 Amplification in a Small Subset of Breast Tumors |
| title_sort | cgh cdna and tissue microarray analyses implicate fgfr2 amplification in a small subset of breast tumors |
| url | http://dx.doi.org/10.1155/2001/981218 |
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