Consistent MYC and FLT4 gene amplification in radiation-induced angiosarcoma but not in other radiation-associated atypical vascular lesions

Guo, T., Zhang, L., Chang, N. E., Singer, S., Maki, R. G., Antonescu, C. R. (January 2011) Consistent MYC and FLT4 gene amplification in radiation-induced angiosarcoma but not in other radiation-associated atypical vascular lesions. Genes Chromosomes Cancer, 50 (1). pp. 25-33. ISSN 1098-2264 (Electronic)1045-2257 (Linking)

URL: https://www.ncbi.nlm.nih.gov/pubmed/20949568
DOI: 10.1002/gcc.20827

Abstract

Angiosarcoma (AS) is a distinct group of sarcomas characterized by upregulation of vascular-specific receptor tyrosine kinases, including TIE1, KDR, TEK, and FLT1. In keeping with the clinical heterogeneity, gene-expression profiling distinguishes two AS genomic clusters, which correlate with anatomical location and prior exposure to radiation. Furthermore, a high percentage of secondary AS, but not primary AS, shows distinct 8q24 chromosomal gains, due to MYC amplification. In this study, we mined the transcriptional output of 10 secondary and 11 primary AS to better define the dichotomy in the pathogenesis of these two clinical subsets. The oncogenic role of MYC was investigated further in secondary AS as well as in radiation-induced atypical vascular lesions (AVL) and other radiation-associated sarcomas. High-level MYC amplification was found in 100% of secondary AS, but in none of the AVL or other radiation-associated sarcomas. Coamplification of FLT4 (encoding VEGFR3) was identified in 25% of secondary AS, but not in other types. Our findings reinforce the distinct pathogenesis of AS subtypes, with MYC amplification being an early, but necessary event in secondary AS. Secondary genetic hits, such as FLT4 gene coamplification or KDR mutations, may play a role in tumor progression as well as potential therapeutic targeting.

Item Type: Paper
Uncontrolled Keywords: Antibodies, Monoclonal/metabolism Antibodies, Monoclonal, Murine-Derived Blotting, Western Breast Neoplasms/radiotherapy Cell Line, Tumor Female *Gene Amplification Gene Expression Profiling *Genes, myc Hemangiosarcoma/*genetics/metabolism Humans Immunohistochemistry In Situ Hybridization, Fluorescence Neoplasm Proteins/metabolism Neoplasms, Radiation-Induced/etiology/*genetics/metabolism Protein Isoforms/metabolism Proto-Oncogene Proteins c-myc/genetics/metabolism Radiotherapy/adverse effects Vascular Diseases/etiology/*genetics/metabolism Vascular Endothelial Growth Factor Receptor-3/*genetics/metabolism
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function > genes: types > Myc
diseases & disorders > cancer > cancer types > angiosarcoma
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function > genes: types > oncogene
CSHL Authors:
Communities: CSHL labs > Maki lab
Depositing User: Matt Covey
Date: January 2011
Date Deposited: 21 Oct 2016 19:47
Last Modified: 21 Oct 2016 19:47
PMCID: PMC3150534
Related URLs:
URI: http://repository.cshl.edu/id/eprint/33721

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