Cited by 120Viral-associated cancers and disordersLymphoma Diagnosis and TreatmentCNS Lymphoma Diagnosis and Treatment

Comprehensive transcriptome and mutational profiling of endemic Burkitt lymphoma reveals EBV type–specific differences

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Kaymaz, Yasin, Oduor, Cliff I., Yu, Hongbo, Otieno, Juliana A., Ong'echa, John Michael, Moormann, Ann M., Bailey, Jeffrey A.·2017·Molecular Cancer Research

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Abstract

Endemic Burkitt lymphoma (eBL) is the most common pediatric cancer in malaria-endemic equatorial Africa and nearly always contains Epstein–Barr virus (EBV), unlike sporadic Burkitt lymphoma (sBL) that occurs with a lower incidence in developed countries. Given these differences and the variable clinical presentation and outcomes, we sought to further understand pathogenesis by investigating transcriptomes using RNA sequencing (RNAseq) from multiple primary eBL tumors compared with sBL tumors. Within eBL tumors, minimal expression differences were found based on: anatomical presentation site, in-hospital survival rates, and EBV genome type, suggesting that eBL tumors are homogeneous without marked subtypes. The outstanding difference detected using surrogate variable analysis was the significantly decreased expression of key genes in the immunoproteasome complex (PSMB9/β1i, PSMB10/β2i, PSMB8/β5i, and PSME2/PA28β) in eBL tumors carrying type 2 EBV compared with type 1 EBV. Second, in comparison with previously published pediatric sBL specimens, the majority of the expression and pathway differences was related to the PTEN/PI3K/mTOR signaling pathway and was correlated most strongly with EBV status rather than geographic designation. Third, common mutations were observed significantly less frequently in eBL tumors harboring EBV type 1, with mutation frequencies similar between tumors with EBV type 2 and without EBV. In addition to the previously reported genes, a set of new genes mutated in BL, including TFAP4, MSH6, PRRC2C, BCL7A, FOXO1, PLCG2, PRKDC, RAD50, and RPRD2, were identified. Overall, these data establish that EBV, particularly EBV type 1, supports BL oncogenesis, alleviating the need for certain driver mutations in the human genome. Implications: Genomic and mutational analyses of Burkitt lymphoma tumors identify key differences based on viral content and clinical outcomes suggesting new avenues for the development of prognostic molecular biomarkers and therapeutic interventions. Mol Cancer Res; 15(5); 563–76. ©2017 AACR.

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  • An RNA-seq study of patient tumors of endemic Burkitt lymphoma showed that the vast majority of cases which harbor EBV contain PLCγ2 mutations, along with mutations in other genes including MYC.

    “In addition, an RNA-seq study of patient tumors of EBL, a common childhood cancer from equatorial Africa where malaria is endemic, showed that the vast majority of cases which harbor EBV contain PLCγ2 mutations, along with mutations in other genes including MYC (142).”

    From The role of PLCγ2 in immunological disorders, cancer, and neurodegeneration (2021) · cites this paper as [142]

    The Results (Table 2; page unavailable) report PLCG2 mutations in 0% of EBV type 1 tumors and 25% of EBV type 2 tumors, contrary to the claim that the vast majority of EBV-positive cases had them. The study did use RNA-seq on patient tumors and report MYC mutations, but those points do not support the claimed PLCG2 prevalence. (LLM, conf=0.94)

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  • Mutations in PLCγ2 are relevant to disease initiation in endemic Burkitt lymphoma.

    “Interestingly, while MYC translocation and hyperexpression is a hallmark of EBL, it in itself is not sufficient to induce lymphogenesis (143), which may at least in part explain why mutations in PLCγ2 are relevant to the disease initiation (142).”

    From The role of PLCγ2 in immunological disorders, cancer, and neurodegeneration (2021) · cites this paper as [142]

    The Results report PLCG2 mutations in endemic Burkitt lymphoma and identify PLCγ2 as an enzyme in B-cell receptor signaling. The Discussion links signaling pathways to lymphoma development, but does not establish that PLCG2 mutations contribute specifically to disease initiation. Page numbers are not available in our copy. (LLM, conf=0.84)

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Authors
Kaymaz, Y., Oduor, C. I., Yu, H., Otieno, J. A., Ong'echa, J. M., Moormann, A. M., & Bailey, J. A.
Affiliations
  • University of Massachusetts Chan Medical School (US)
  • Maseno University (KE)
  • Ministry of Health (KE)
  • 2Center for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.
Corresponding author
Bailey, Jeffrey A.
Venue
Molecular Cancer Research
Published
2017-05-01
Volume
15
Issue
5
Pages
563-576
ISSN
  • 1541-7786 (ISSN-L)
  • 1557-3125
OpenAlex
W2580872164
Cited by
120
References
65
Citations by year
2026: 10 · 2025: 11 · 2024: 17 · 2023: 23 · 2022: 16 · 2021: 14 · 2020: 11 · 2019: 9 · 2018: 4 · 2017: 5
FWCI
3.50
Type
journal article
Language
en
Open access
Locations
  • Molecular Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR001453, UL1TR000161)
  • National Cancer Institute (R01CA134051, R01CA189806)
  • National Institute of Allergy and Infectious Diseases (R01AI099473)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Oncology › Viral-associated cancers and disorders
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
  • Health Sciences › Medicine › Neurology › CNS Lymphoma Diagnosis and Treatment
Keywords
endemic Burkitt lymphoma, sporadic Burkitt lymphoma, Epstein-Barr virus, transcriptome, mutational profiling, immunoproteasome, PSMB9, TFAP4, MSH6, prognostic factors, pediatric lymphoma
MeSH terms
Adolescent, Burkitt Lymphoma, Child, Child, Preschool, Herpesvirus 4, Human, Female, Humans, Kenya, Male, Mutation, Genome, Viral, Sequence Analysis, RNA, Endemic Diseases, Epstein-Barr Virus Infections, Gene Expression Profiling, Gene Regulatory Networks, Mutation Rate

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