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Whole exome sequencing identifies novel recurrently mutated genes in patients with splenic marginal zone lymphoma. | LitMetric

AI Article Synopsis

  • The study explores the unknown causes of splenic marginal zone lymphoma (SMZL) by analyzing genetic mutations and abnormalities in a specific group of patients.
  • Using advanced sequencing techniques, researchers identified 173 genetic variants and confirmed mutations in several known genes, while also discovering eight new recurrently mutated genes associated with SMZL.
  • The findings enhance the understanding of SMZL's genetic landscape and could lead to improved treatment strategies, including targeted therapy based on specific mutations.

Article Abstract

The pathogenesis of splenic marginal zone lymphoma (SMZL) remains largely unknown. Recent high-throughput sequencing studies have identified recurrent mutations in key pathways, most notably NOTCH2 mutations in >25% of patients. These studies are based on small, heterogeneous discovery cohorts, and therefore only captured a fraction of the lesions present in the SMZL genome. To identify further novel pathogenic mutations within related biochemical pathways, we applied whole exome sequencing (WES) and copy number (CN) analysis to a biologically and clinically homogeneous cohort of seven SMZL patients with 7q abnormalities and IGHV1-2*04 gene usage. We identified 173 somatic non-silent variants, affecting 160 distinct genes. In additional to providing independent validation of the presence of mutation in several previously reported genes (NOTCH2, TNFAIP3, MAP3K14, MLL2 and SPEN), our study defined eight additional recurrently mutated genes in SMZL; these genes are CREBBP, CBFA2T3, AMOTL1, FAT4, FBXO11, PLA2G4D, TRRAP and USH2A. By integrating our WES and CN data we identified three mutated putative candidate genes targeted by 7q deletions (CUL1, EZH2 and FLNC), with FLNC positioned within the well-characterized 7q minimally deleted region. Taken together, this work expands the reported directory of recurrently mutated cancer genes in this disease, thereby expanding our understanding of SMZL pathogenesis. Ultimately, this work will help to establish a stratified approach to care including the possibility of targeted therapy.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3862727PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0083244PLOS

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