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Objectives

The Hippo signaling pathway plays a critical role in organ size control and tissue homeostasis and its perturbation is associated with tumorigenesis. YAP (Yes associated protein) and TAZ (transcriptional co-activator with PDZ-binding motif) are the major nuclear effectors of the Hippo pathway interacting with TEADs (TEA domain) and p73 transcriptional factors to regulate gene expression. Altered expression of the above proteins promotes tumor initiation, progression and metastasis in a variety of cancer types. This study addresses their expression and prognostic significance in human laryngeal carcinoma.

Methods

Protein expression of YAP, TAZ, TEAD4 and p73 was examined by immunohistochemistry in 121 human laryngeal squamous cell carcinomas. Correlations with clinicopathological data and survival were evaluated.

Results

All proteins were overexpressed in human laryngeal carcinomas compared to non-neoplastic adjacent epithelium. High expression of YAP, TAZ, TEAD4 and p73 correlated significantly with high grade, advanced stage, supraglottic location of tumor, nodal metastases and recurrence. Furthermore, high expression of all proteins was significantly associated with poor overall and disease-free survival. p73 expression proved to be an independent predictive factor of survival and YAP expression proved to be an independent predictive factor of disease recurrence.

Conclusions

Deregulation of the expression of the Hippo pathway proteins is implicated in human laryngeal carcinogenesis and YAP and p73 have prognostic significance in the outcome of the disease."xsd:string
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http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/author"Bravou V."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/author"Papadaki H."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/author"Nikou S."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/author"Tsinias G."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/author"Mastronikolis N."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/date"2020"xsd:gYear
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/name"Histol Histopathol"xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/pages"983-995"xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/title"Expression and prognostic significance of YAP, TAZ, TEAD4 and p73 in human laryngeal cancer."xsd:string
http://purl.uniprot.org/citations/32378727http://purl.uniprot.org/core/volume"35"xsd:string
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