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Pre-neoplastic somatic mutations including MYD88L265P in lymphoplasmacytic lymphoma

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE185158 | GEO | 2021/11/04

REPOSITORIES: GEO

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Pre-neoplastic somatic mutations including MYD88L265P in lymphoplasmacytic lymphoma [WES]

Project description:Normal-cell counterparts of solid and myeloid tumors accumulate mutations years before disease onset; whether this occurs in B-lymphocytes prior to lymphoma remains uncertain. We sequenced multiple stages of the B-lineage in elderly individuals and patients with lymphoplasmacytic lymphoma, a singular disease for studying lymphomagenesis because of high-prevalence of mutated MYD88. We observed similar accumulation of random mutations in B-lineages from both cohorts and, unexpectedly, found MYD88L265P in normal precursor and mature B-lymphocytes from lymphoma patients. We uncovered genetic and transcriptional pathways driving malignant transformation and leveraged these to model lymphoplasmacytic lymphoma in mice, based on mutated MYD88 in B-cell precursors and BCL2 overexpression. Thus, MYD88L265P is a pre-neoplastic event, which challenges current understanding of lymphomagenesis and may have implications for early detection of B-cell lymphomas.

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Project description:Normal cell counterparts of solid and myeloid tumors accumulate mutations years before disease onset; whether this occurs in B lymphocytes before lymphoma remains uncertain. We sequenced multiple stages of the B lineage in elderly individuals and patients with lymphoplasmacytic lymphoma, a singular disease for studying lymphomagenesis because of the high prevalence of mutated MYD88. We observed similar accumulation of random mutations in B lineages from both cohorts and unexpectedly found MYD88L265P in normal precursor and mature B lymphocytes from patients with lymphoma. We uncovered genetic and transcriptional pathways driving malignant transformation and leveraged these to model lymphoplasmacytic lymphoma in mice, based on mutated MYD88 in B cell precursors and BCL2 overexpression. Thus, MYD88L265P is a preneoplastic event, which challenges the current understanding of lymphomagenesis and may have implications for early detection of B cell lymphomas.

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