VASN promotes YAP/TAZ and EMT pathway in thyroid carcinogenesis in vitro.

Background: Thyroid cancer incidence has been continuity growing globally. To Find reliable molecular biomarkers to assess prognosis and select optimal treatment is necessary. VASN is a protein-coding gene that plays a vital part in tumor development and angiogenesis. Analyzing the TCGA dates, we found VASN could be a potential marker in assessing thyroid prognosis. The act of VASN in thyroid cancer is not explicit. In this article, we investigate the function of VASN expression in thyroid cancer. Methods: The Cancer Genome Atlas (TCGA) unpaired thyroid cancer and normal RNA-seq data was download and our paired thyroid cancer, and a polymerase chain reaction analyzed normal samples. The expression of VASN was regulated by transfected small interfering RNA, and the function of VASN was determined through migration, invasion and cell proliferation assays. Western blot assay was performed to reveal the relation between the VASN expression and YAP/TAZ pathway, epithelial-mesenchymal transition in thyroid carcinogenesis. Results: The significant upregulation of VASN in papillary thyroid carcinoma tissues associated to normal thyroid tissues was revealed by our data and TCGA data. VASN overexpression was significantly correlated to lymph node metastasis, tumor stage and tumor size. In the cell, experiments showed that VASN low expression significantly suppressed the migration, invasion, and proliferation. Western blot assay proves the effect of VASN expression on YAP/TAZ pathway and epithelial-mesenchymal transition. Conclusion: VASN plays a crucial oncogene in thyroid cancer. Our results indicate that VASN could be a biomarker of thyroid cancer and may act in the YAP/TAZ pathway to regulate epithelial-mesenchymal transition (EMT).