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• W1991297649 abstract "Malignant peripheral nerve sheath tumors (MPNST) occur at increased frequency in individuals with neurofibromatosis type 1 (NF1), where they likely arise from benign plexiform neurofibroma precursors. While previous studies have used a variety of discovery approaches to discover genes associated with MPNST pathogenesis, it is currently unclear what molecular events are associated with the evolution of MPNST from plexiform neurofibroma.Whole-exome sequencing was performed on biopsy materials representing plexiform neurofibroma (n = 3), MPNST, and metastasis from a single individual with NF1 over a 14-year period. Additional validation cases were used to assess candidate genes involved in malignant progression, while a murine MPNST model was used for functional analysis.There was an increasing proportion of cells with a somatic NF1 gene mutation as the tumors progressed from benign to malignant, suggesting a clonal process in MPNST development. Copy number variations, including loss of one copy of the TP53 gene, were identified in the primary tumor and the metastatic lesion, but not in benign precursor lesions. A limited number of genes with nonsynonymous somatic mutations (βIII-spectrin and ZNF208) were discovered, several of which were validated in additional primary and metastatic MPNST samples. Finally, increased βIII-spectrin expression was observed in the majority of MPNSTs, and shRNA-mediated knockdown reduced murine MPNST growth in vivo.Collectively, the ability to track the molecular evolution of MPNST in a single individual with NF1 offers new insights into the sequence of genetic events important for disease pathogenesis and progression for future mechanistic study." @default.
• W1991297649 created "2016-06-24" @default.
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• W1991297649 date "2015-09-14" @default.
• W1991297649 modified "2023-10-12" @default.
• W1991297649 title "Whole Exome Sequencing Reveals the Order of Genetic Changes during Malignant Transformation and Metastasis in a Single Patient with NF1-plexiform Neurofibroma" @default.
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• W1991297649 doi "https://doi.org/10.1158/1078-0432.ccr-14-3049" @default.
• W1991297649 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4573781" @default.
• W1991297649 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25925892" @default.
• W1991297649 hasPublicationYear "2015" @default.
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