Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies
Genomic instability plays a crucial role in oncogenesis. Somatically acquired mutations can disable some genes and inappropriately activate others. In addition, chromosomal rearrangements can amplify, delete, or even fuse genes, altering their functions and contributing to malignant phenotypes. Usin...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Hematology |
| Online Access: | http://dx.doi.org/10.1155/2012/627920 |
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| author | J. Kimble Frazer Lance A. Batchelor Diana F. Bradley Kim H. Brown Kimberly P. Dobrinski Charles Lee Nikolaus S. Trede |
| author_facet | J. Kimble Frazer Lance A. Batchelor Diana F. Bradley Kim H. Brown Kimberly P. Dobrinski Charles Lee Nikolaus S. Trede |
| author_sort | J. Kimble Frazer |
| collection | DOAJ |
| description | Genomic instability plays a crucial role in oncogenesis. Somatically acquired mutations can disable some genes and inappropriately activate others. In addition, chromosomal rearrangements can amplify, delete, or even fuse genes, altering their functions and contributing to malignant phenotypes. Using array comparative genomic hybridization (aCGH), a technique to detect numeric variations between different DNA samples, we examined genomes from zebrafish (Danio rerio) T-cell leukemias of three cancer-prone lines. In all malignancies tested, we identified recurring amplifications of a zebrafish endogenous retrovirus. This retrovirus, ZFERV, was first identified due to high expression of proviral transcripts in thymic tissue from larval and adult fish. We confirmed ZFERV amplifications by quantitative PCR analyses of DNA from wild-type fish tissue and normal and malignant D. rerio T cells. We also quantified ZFERV RNA expression and found that normal and neoplastic T cells both produce retrovirally encoded transcripts, but most cancers show dramatically increased transcription. In aggregate, these data imply that ZFERV amplification and transcription may be related to T-cell leukemogenesis. Based on these data and ZFERV’s phylogenetic relation to viruses of the murine-leukemia-related virus class of gammaretroviridae, we posit that ZFERV may be oncogenic via an insertional mutagenesis mechanism. |
| format | Article |
| id | doaj-art-785154bf8e2b4e0782fa45d7a00fe098 |
| institution | Kabale University |
| issn | 1687-9104 1687-9112 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Hematology |
| spelling | doaj-art-785154bf8e2b4e0782fa45d7a00fe0982025-02-03T06:05:47ZengWileyAdvances in Hematology1687-91041687-91122012-01-01201210.1155/2012/627920627920Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell MalignanciesJ. Kimble Frazer0Lance A. Batchelor1Diana F. Bradley2Kim H. Brown3Kimberly P. Dobrinski4Charles Lee5Nikolaus S. Trede6Department of Pediatrics, University of Utah, Salt Lake City, UT 84112, USADepartment of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USADepartment of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USADepartment of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USADepartment of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USADepartment of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USADepartment of Pediatrics, University of Utah, Salt Lake City, UT 84112, USAGenomic instability plays a crucial role in oncogenesis. Somatically acquired mutations can disable some genes and inappropriately activate others. In addition, chromosomal rearrangements can amplify, delete, or even fuse genes, altering their functions and contributing to malignant phenotypes. Using array comparative genomic hybridization (aCGH), a technique to detect numeric variations between different DNA samples, we examined genomes from zebrafish (Danio rerio) T-cell leukemias of three cancer-prone lines. In all malignancies tested, we identified recurring amplifications of a zebrafish endogenous retrovirus. This retrovirus, ZFERV, was first identified due to high expression of proviral transcripts in thymic tissue from larval and adult fish. We confirmed ZFERV amplifications by quantitative PCR analyses of DNA from wild-type fish tissue and normal and malignant D. rerio T cells. We also quantified ZFERV RNA expression and found that normal and neoplastic T cells both produce retrovirally encoded transcripts, but most cancers show dramatically increased transcription. In aggregate, these data imply that ZFERV amplification and transcription may be related to T-cell leukemogenesis. Based on these data and ZFERV’s phylogenetic relation to viruses of the murine-leukemia-related virus class of gammaretroviridae, we posit that ZFERV may be oncogenic via an insertional mutagenesis mechanism.http://dx.doi.org/10.1155/2012/627920 |
| spellingShingle | J. Kimble Frazer Lance A. Batchelor Diana F. Bradley Kim H. Brown Kimberly P. Dobrinski Charles Lee Nikolaus S. Trede Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies Advances in Hematology |
| title | Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies |
| title_full | Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies |
| title_fullStr | Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies |
| title_full_unstemmed | Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies |
| title_short | Genomic Amplification of an Endogenous Retrovirus in Zebrafish T-Cell Malignancies |
| title_sort | genomic amplification of an endogenous retrovirus in zebrafish t cell malignancies |
| url | http://dx.doi.org/10.1155/2012/627920 |
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