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BZW2 gene knockdown induces cell growth inhibition, G1 arrest and apoptosis in muscle-invasive bladder cancers: A
Haifeng Gao1, Guanghai Yu1, Xian Zhang2
1Department of Urology Surgery, Dalian Municipal Central Hospital, Dalian, China.
Abstract:
Bladder cancer is among the most common cancers all over the world. The function of basic leucine zipper and W2 domains 2 (BZW2) in tumour progression has been reported. However, the biological function of BZW2 in muscle-invasive bladder cancers (MIBCs) remains to be determined. The aim of the present study was to reveal the expression and roles of BZW2 in human MIBCs and to explore the molecular mechanisms underlying these functions. Clinically, BZW2 expression was higher in MIBC tissues than the adjacent non-tumour tissues. Knocking down BZW2 using shRNA inhibited cell proliferation and G1/S cell cycle progression in vitro, and induced apoptosis in both 5637 and T24 cells. Moreover, in vivo studies with mice xenograft models confirmed the anti-proliferative effects of BZW2-knockdown, providing a future therapeutic target. We also performed biochemical microarray analysis to identify the potential signalling pathways, disease states and functions which could be affected by suppressing BZW2 in MIBC cells. Collectively, our findings suggest BZW2 has an oncogenic role in MIBCs and serves as a promising target for molecular diagnosis and gene therapy.
Insights
Basic leucine zipper and W2 domains 2 (BZW2) promotes muscle-invasive bladder cancer (MIBC) growth. Inhibiting BZW2 suppressed tumor cell proliferation and induced apoptosis, suggesting BZW2 as a potential therapeutic target for bladder cancer.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Bladder cancer is a prevalent global malignancy.
- The role of basic leucine zipper and W2 domains 2 (BZW2) in tumor progression is known, but its specific function in muscle-invasive bladder cancer (MIBC) is unclear.
Purpose of the Study:
- To investigate the expression and function of BZW2 in human MIBC.
- To explore the molecular mechanisms by which BZW2 influences MIBC.
Main Methods:
- Analysis of BZW2 expression in MIBC tissues versus adjacent non-tumour tissues.
- In vitro studies using shRNA to knockdown BZW2 in bladder cancer cell lines (5637 and T24).
- In vivo studies using mice xenograft models.
- Biochemical microarray analysis to identify affected signaling pathways.
Main Results:
- BZW2 expression was significantly higher in MIBC tissues compared to non-tumour tissues.
- BZW2 knockdown inhibited cell proliferation and G1/S cell cycle progression in vitro.
- BZW2 knockdown induced apoptosis in bladder cancer cells.
- In vivo studies confirmed the anti-proliferative effect of BZW2 knockdown.
Conclusions:
- BZW2 plays an oncogenic role in muscle-invasive bladder cancer.
- BZW2 is a potential therapeutic target for MIBC diagnosis and gene therapy.
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