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- W2056272798 abstract "Proper splicing of pre-mRNA is required for protein synthesis and therefore is a fundamental cellular function. The discovery of a variety of somatic spliceosomal mutations in haematological malignancies, including myeloid neoplasms and chronic lymphocytic leukaemia has pointed to a new leukaemogenic pathway involving spliceosomal dysfunction. Theoretically, spliceosomal mutations can lead to activation of incorrect splice sites, intron retention or aberrant alternative splicing occurring in patterns generated by mutations of individual spliceosomal proteins. Such events can produce a defective balance between protein isoforms leading to functional consequences including defective regulation of proliferation and differentiation. The observed pattern of occurrence of highly specific missense mutations, coupled with the lack of nonsense mutations and deletions, implies a gain-of-function or better gain-of-dysfunction mechanism. Incorrect splicing of downstream genes, such as tumour suppressor genes, may result in haploinsufficient expression through nonsense-mediated mRNA decay. Thus, spliceosomal mutations may, depending on the pattern of affected proteins, lead to similar functional effects on tumour suppressor genes as chromosomal deletions, epigenetic silencing or inactivating/hypomorphic mutations. The prognostic value of the most common mutations and their phenotypic association in the clinical setting is currently under investigation. It is likely that spliceosomal mutations may indicate sensitivity to spliceosome inhibitors applied in the form of a synthetic lethal approach. This review discusses the most current aspects of spliceosomal research in the context of haematological malignancies." @default.
- W2056272798 created "2016-06-24" @default.
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- W2056272798 date "2012-05-18" @default.
- W2056272798 modified "2023-10-13" @default.
- W2056272798 title "Defects in spliceosomal machinery: a new pathway of leukaemogenesis" @default.
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- W2056272798 doi "https://doi.org/10.1111/j.1365-2141.2012.09158.x" @default.
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