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  • HN1 negatively influences the β-catenin/E-cadherin interaction, and contributes to migration in prostate cells.

HN1 negatively influences the β-catenin/E-cadherin interaction, and contributes to migration in prostate cells.

Journal of cellular biochemistry (2014-08-30)
Lokman Varisli, Bilge E Ozturk, Gencer K Akyuz, Kemal S Korkmaz
摘要

Previously, it has been reported that HN1 is involved in cytoplasmic retention and degradation of androgen receptor in an AKT dependent manner. As HN1 is a hormone inducible gene, and has been shown that it is upregulated in various cancers, we studied the importance of HN1 function in β-catenin signaling in prostate cancer cell line, PC-3 and mammary cancer cell line MDA-MB231. Here, we demonstrated that HN1 physically associates with GSK3β/β-catenin destruction complex and abundantly localizes to cytoplasm, especially when the GSK3β is phosphorylated on S9 residue. Further, ectopic HN1 expression results an increase in the β-catenin degradation leading to loss of E-cadherin interaction, concurrently contributing to actin re-organization, colony formation and migration in cancer cell lines. Thus, we report that HN1 is an essential factor for β-catenin turnover and signaling, augments cell growth and migration in prostate cancer cells.

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