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Distinct Viral and Mutational Spectrum of Endemic Burkitt Lymphoma

Endemic Burkitt lymphoma (eBL) is primarily found in children in equatorial regions and represents the first historical example of a virus-associated human malignancy. Although Epstein-Barr virus (EBV) infection and MYC translocations are hallmarks of the disease, it is unclear whether other factors...

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Detalles Bibliográficos
Autores principales: Abate, Francesco, Ambrosio, Maria Raffaella, Mundo, Lucia, Laginestra, Maria Antonella, Fuligni, Fabio, Rossi, Maura, Zairis, Sakellarios, Gazaneo, Sara, De Falco, Giulia, Lazzi, Stefano, Bellan, Cristiana, Rocca, Bruno Jim, Amato, Teresa, Marasco, Elena, Etebari, Maryam, Ogwang, Martin, Calbi, Valeria, Ndede, Isaac, Patel, Kirtika, Chumba, David, Piccaluga, Pier Paolo, Pileri, Stefano, Leoncini, Lorenzo, Rabadan, Raul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4607508/
https://www.ncbi.nlm.nih.gov/pubmed/26468873
http://dx.doi.org/10.1371/journal.ppat.1005158
Descripción
Sumario:Endemic Burkitt lymphoma (eBL) is primarily found in children in equatorial regions and represents the first historical example of a virus-associated human malignancy. Although Epstein-Barr virus (EBV) infection and MYC translocations are hallmarks of the disease, it is unclear whether other factors may contribute to its development. We performed RNA-Seq on 20 eBL cases from Uganda and showed that the mutational and viral landscape of eBL is more complex than previously reported. First, we found the presence of other herpesviridae family members in 8 cases (40%), in particular human herpesvirus 5 and human herpesvirus 8 and confirmed their presence by immunohistochemistry in the adjacent non-neoplastic tissue. Second, we identified a distinct latency program in EBV involving lytic genes in association with TCF3 activity. Third, by comparing the eBL mutational landscape with published data on sporadic Burkitt lymphoma (sBL), we detected lower frequencies of mutations in MYC, ID3, TCF3 and TP53, and a higher frequency of mutation in ARID1A in eBL samples. Recurrent mutations in two genes not previously associated with eBL were identified in 20% of tumors: RHOA and cyclin F (CCNF). We also observed that polyviral samples showed lower numbers of somatic mutations in common altered genes in comparison to sBL specimens, suggesting dual mechanisms of transformation, mutation versus virus driven in sBL and eBL respectively.