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Transposon-activated POU5F1B promotes colorectal cancer growth and metastasis

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

ORGANISM(S): Homo sapiens

PROVIDER: GSE182467 | GEO | 2022/08/02

REPOSITORIES: GEO

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Transposon-activated POU5F1B promotes colorectal cancer growth and metastasis I

Project description:Tumors occasionally express oncogenes via aberrant activation of transposable elements (TE), but a role for this process in oncogenesis was seldom demonstrated. Here, we identify expression of the hominid-restricted retrogene POU5F1B through aberrant activation of an endogenous retroviral promoter as a strong negative prognostic marker in colorectal cancer (CRC). We further determine that POU5F1B is membrane-enriched and interacts with ERBB2 and associated effectors, and fosters the proliferation and metastatic potential of CRC cells through intracellular signaling events and release of trans-acting molecules involved in cell growth, angiogenesis and cell adhesion. As POU5F1B is apparently non-essential and only lowly expressed in normal tissues, and as POU5F1B-containing TE-driven transcripts are detected in other tumors besides CRC, these data provide interesting leads for the development of cancer therapies.

2022-08-02 | GSE161083 | GEO

Transposon-activated POU5F1B promotes colorectal cancer growth and metastasis III

Project description:The treatment of colorectal cancer (CRC) is an unmet medical need in absence of early diagnosis. Here, upon characterizing cancer-specific transposable element-driven transpochimeric gene transcripts (TcGTs) produced by this tumor, we found that expression of the hominid-restricted retrogene POU5F1B through aberrant activation of a primate-specific endogenous retroviral promoter is a strong negative prognostic CRC biomarker. Correlating this observation, we could demonstrate that POU5F1B fosters the proliferation and metastatic potential of CRC cells. We further determined that POU5F1B, in spite of its phylogenetic relationship with the POU5F1/OCT4 transcription factor, is a membrane-enriched protein that associates with protein kinases and known targets or interactors as well as with cytoskeleton-related molecules, and induces intracellular signaling events and the release of trans-acting factors involved in cell growth and cell adhesion. As POU5F1B is an apparently non-essential gene only lowly expressed in normal tissues, and as POU5F1B-containing TcGTs are detected in other tumors besides CRC, our data provide interesting leads for the development of cancer therapies.

2022-08-02 | GSE182466 | GEO

Transposon-activated POU5F1B promotes colorectal cancer growth and metastasis II

2022-08-02 | GSE182465 | GEO

Identification of miRNAs that regulate Colorectal Cancer Metastasis

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CBFβ promotes colorectal tumor growth and metastasis in a RUNX2-dependent manner

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Tissue-specific transcription reprogramming promotes liver metastasis of colorectal cancer

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2020-06-30 | GSE106923 | GEO