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P21-activated kinase 4 involves TSH induced papillary thyroid cancer cell proliferation.

ABSTRACT: Papillary thyroid cancer is a common endocrine malignancy. Although p21-activated kinase 4 (PAK4) is involved in the development of different types of tumor, its function has not been investigated in papillary thyroid cancer. Here, we identified a role for PAK4 in papillary thyroid cancer progression. Levels of PAK4 and PAK4 phosphorylated at serine 474 correlated significantly with tumor size and TNM stage. Furthermore, stable knockdown of PAK4 retarded cellular proliferation, migration, and invasion. Moreover, thyroid stimulating hormone-induced cellular proliferation in papillary thyroid cancer was found to be dependent on TSHR/cAMP/PKA/PAK4 signaling, with levels of phosphorylated PAK4 correlating positively with serum thyroid stimulating hormone and PKA Cα levels in patients with papillary thyroid cancer. These findings revealed a novel function of PAK4 in thyroid stimulating hormone-induced papillary thyroid cancer progression and suggest that PAK4 may become a promising diagnostic and therapeutic target for this disease.

SUBMITTER: Xie X 

PROVIDER: S-EPMC5421896 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

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P21-activated kinase 4 involves TSH induced papillary thyroid cancer cell proliferation.

Xie Xiaochen X   Shi Xiaoguang X   Guan Haixia H   Guo Qiqiang Q   Fan Chenling C   Dong Wenwu W   Wang Guiling G   Li Feng F   Shan Zhongyan Z   Cao Liu L   Teng Weiping W  

Oncotarget 20170401 15

Papillary thyroid cancer is a common endocrine malignancy. Although p21-activated kinase 4 (PAK4) is involved in the development of different types of tumor, its function has not been investigated in papillary thyroid cancer. Here, we identified a role for PAK4 in papillary thyroid cancer progression. Levels of PAK4 and PAK4 phosphorylated at serine 474 correlated significantly with tumor size and TNM stage. Furthermore, stable knockdown of PAK4 retarded cellular proliferation, migration, and in  ...[more]

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