Title |
Expression profiling of Epstein-Barr virus-encoded microRNAs from paraffin-embedded formalin-fixed primary Epstein-Barr virus-positive B-cell lymphoma samples
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Published in |
Journal of Virological Methods, May 2012
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DOI | 10.1016/j.jviromet.2012.05.005 |
Pubmed ID | |
Authors |
Jamie P. Nourse, Pauline Crooks, Colm Keane, Nguyen-Van, Sally Mujaj, Nathan Ross, Kimberley Jones, Frank Vari, Erica Han, Ralf Trappe, Susanne Fink, Maher K. Gandhi |
Abstract |
Epstein-Barr virus (EBV) is implicated in a range of B-cell malignancies and expresses unique microRNAs (EBV-miRNAs). Due to the requirements for high-quality RNA, studies profiling EBV-miRNA in EBV-positive lymphomas have been restricted to cell-lines or frozen samples. However, the most commonly available archived patient material is paraffin-embedded formalin-fixed (FFPE) tissue. This has impeded the widespread profiling of EBV-miRNA expression in clinical samples. The requirements for accurate EBV-miRNA real-time RT-PCR quantitation in FFPE tissues representing a broad-spectrum of EBV-positive lymphomas were determined systematically, including where the neoplastic cells are sparse relative to the non-malignant infiltrate. The level of cellular EBV-load correlated strongly with the sum of EBV-miRNA expression and the number of EBV-miRNAs detectable. As calibrators for cellular EBV-load, the sum EBV-miRNA was optimal to EBV-genome copy number and EBER2 expression level, with the added advantage of not requiring additional assays. EBV-miRNA was profiled reliably within archival FFPE tissue in 14/23 patients, but not in tissues with low abundance EBV. This method enabled specific and simultaneous detection of numerous EBV-miRNAs in FFPE lymphoma samples that contain EBV at high to medium levels, making it as a useful tool for studies of EBV-miRNA in the majority of diagnostic biopsies. |
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Unknown | 1 | 100% |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 23 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 4 | 17% |
Student > Master | 3 | 13% |
Student > Bachelor | 2 | 9% |
Professor | 2 | 9% |
Researcher | 2 | 9% |
Other | 7 | 30% |
Unknown | 3 | 13% |
Readers by discipline | Count | As % |
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Medicine and Dentistry | 8 | 35% |
Agricultural and Biological Sciences | 7 | 30% |
Biochemistry, Genetics and Molecular Biology | 3 | 13% |
Immunology and Microbiology | 1 | 4% |
Veterinary Science and Veterinary Medicine | 1 | 4% |
Other | 0 | 0% |
Unknown | 3 | 13% |