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Recurrent YAP1-MAML2 and YAP1-NUTM1 fusions in poroma and porocarcinoma
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Recurrent YAP1-MAML2 and YAP1-NUTM1 fusions in poroma and porocarcinoma
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Recurrent YAP1-MAML2 and YAP1-NUTM1 fusions in poroma and porocarcinoma
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Journal Article
Recurrent YAP1-MAML2 and YAP1-NUTM1 fusions in poroma and porocarcinoma
2019
Overview
Poroma is a benign skin tumor exhibiting terminal sweat gland duct differentiation. The present study aimed to explore the potential role of gene fusions in the tumorigenesis of poromas. RNA sequencing and reverse transcription PCR identified highly recurrent YAP1-MAML2 and YAP1-NUTM1 fusions in poromas (92/104 lesions, 88.5%) and their rare malignant counterpart, porocarcinomas (7/11 lesions, 63.6%). A WWTR1-NUTM1 fusion was identified in a single lesion of poroma. Fluorescent in-situ hybridization confirmed genomic rearrangements involving these genetic loci. Immunohistochemical staining could readily identify the YAP1 fusion products as nuclear expression of the N-terminal portion of YAP1 with a lack of the C-terminal portion. YAP1 and WWTR1, also known as YAP and TAZ, respectively, encode paralogous transcriptional activators of TEAD, which are negatively regulated by the Hippo signaling pathway. The YAP1 and WWTR1 fusions strongly transactivated a TEAD reporter and promoted anchorage-independent growth, confirming their tumorigenic roles. Our results demonstrate the frequent presence of transforming YAP1 fusions in poromas and porocarcinomas and suggest YAP1/TEAD-dependent transcription as a candidate therapeutic target against porocarcinoma.
Publisher
American Society for Clinical Investigation
Subject
Adaptor Proteins, Signal Transducing - genetics
/ Adaptor Proteins, Signal Transducing - metabolism
/ Adult
/ Aged
/ Animals
/ Cancer
/ Female
/ Fluorescence in situ hybridization
/ Genes
/ Genomes
/ Humans
/ In Situ Hybridization, Fluorescence
/ Male
/ Mice
/ Mutation
/ Neoplasm Proteins - genetics
/ Neoplasm Proteins - metabolism
/ Nuclear Proteins - metabolism
/ Oncogene Proteins, Fusion - genetics
/ Oncogene Proteins, Fusion - metabolism
/ Proteins
/ RNA
/ Skin
/ Sweat
/ Sweat Gland Neoplasms - genetics
/ Sweat Gland Neoplasms - metabolism
/ Trans-Activators - metabolism
/ Transcription Factors - genetics
/ Transcription Factors - metabolism
/ Tumors
