HMGN5 expression in bladder cancer tissue and its role on prognosis

Abstract

Objective: High mobility group protein N5 subtype (HMGN5) is overexpressed in bladder cancer tissue, while its specific mechanism in bladder cancer oncogenesis has not been fully elucidated. This study intends to investigate the impact of HMGN5 on clinical staging and prognosis of bladder cancer.

Patients and methods: A total of 26 cases of patients with bladder transitional cell carcinoma (BTCC) received transurethral resection (TUR-BT) in our hospital between March 2015 and February 2016. Para-carcinoma tissue at 5 cm away from cancer tissue was selected as normal control. The expressions of HMGN5 mRNA and protein in different clinical stages were tested by Real-time PCR and Western blot. The relationship between HMGN5 expression and clinical stage along with prognosis was analyzed.

Results: HMGN5 mRNA was significantly elevated in BTCC tissue compared with that in para-carcinoma tissue (p < 0.05). HMGN5 mRNA level was gradually upregulated following BTCC upstage according to UICC-TNM stage and WHO stage. The level of HMGN5 protein showed similar changes with mRNA. Follow-up results demonstrated that patients with high HMGN5 level have more tendency of occurrence.

Conclusions: HMGN5 protein level has an important influence on BTCC clinicopathological staging and prognosis. This investigation provides theoretical basis the future therapy of bladder cancer.