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SHR Neuro Krebs Kardio Lipid

Fan, KJ; Gravemeyer, J; Ritter, C; Rasheed, K; Gambichler, T; Moens, U; Shuda, M; Schrama, D; Becker, JC.
MCPyV Large T Antigen-Induced Atonal Homolog 1 Is a Lineage-Dependency Oncogene in Merkel Cell Carcinoma
J INVEST DERMATOL. 2020; 140(1): 56-+. [OPEN ACCESS]
Web of Science PubMed FullText FullText_MUG

 

Autor/innen der Med Uni Graz:
Becker Jürgen Christian
Fan Kaiji
Ritter Cathrin
Schrama David
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Abstract:
Despite the fact that the transcription factor ATOH1 is a master regulator of Merkel cell development, its role in Merkel cell carcinoma (MCC) carcinogenesis remains controversial. Here, we provide several lines of evidence that ATOH1 is a lineage-dependent oncogene in MCC. Luciferase assays revealed binding of ATOH1 and subsequent activation to the promoter of miR-375, which is one of the most abundant microRNAs in MCCs. Overexpression of ATOH1 in variant MCC cell lines and fibroblasts induced miR-375 expression, whereas ATOH1 knockdown in classical MCC cell lines reduced miR-375 expression. Moreover, ATOH1 overexpression in these cells changed their growth characteristics from adherent to suspension and/orspheroidal growth, that is, resembling the neuroendocrine growth pattern of classical MCC cell lines. Notably, ectopic expression of different Merkel cell polyomavirus (MCPyV)-derived truncated large T antigens induced ATOH1 expression in fibroblasts, which was paralleled by miR-375 expression and similar morphologic changes. In summary, MCPyV-associated carcinogenesis is likely to induce the characteristic neuroendocrine features of MCC via induction of ATOH1; thus, ATOH1 can be regarded as a lineage-dependent oncogene in MCC.

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