Transcriptomics

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P62 sustains a protumorigenic gene signature in melanoma opposing mRNA-dependent decay [UACC62_6days]


ABSTRACT: Metastasis is a common cancer hallmark which however, may be acquired by tumor-type specific mechanisms. Here we identify p62/SQSTM1 as a modulator of metastatic genes selectively enriched in melanoma. Loss- and gain-of-function analyses of p62 effectors revealed FERMT2 as an indicator of poor patient prognosis. Analyses in tumor cells, clinical biopsies and genetically-engineered mice (to compare p62 vs. ATG5) demonstrated that known p62 roles in autophagy and stress responses were not essential in melanomas. Instead, a genome-wide transcriptomic/proteomic/interactomic approach demonstrated that p62 controls FERMT2 and yet additional pro-metastatic genes by modulating transcript stability. This function of p62 was exerted by recruiting RNA-binding proteins, here exemplified by IGF2BP1. These data illustrate how genetically altered cancers can coordinately fuel pro-metastatic signatures.

ORGANISM(S): Homo sapiens

PROVIDER: GSE99832 | GEO | 2018/07/05

REPOSITORIES: GEO

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