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Updated: Apr 6, 2026
An Orthotopic Bladder Cancer Model for Gene Delivery Studies
Published on: December 1, 2013
Downregulation of SKA1 Gene Expression Inhibits Cell Growth in Human Bladder Cancer
Feng Tian1, Xiaoxiao Xing1, Feng Xu1
11 Department of Urology, Nanjing Jinling Hospital , Nanjing University School of Medicine, Nanjing, China .
Abstract:
Spindle and kinetochore-associated protein 1 (SKA1), a component of microtubule-binding complex of kinetochore, is essential for proper chromosome segregation. Recently, SKA1 has been shown to be involved in malignant progression of several human cancers. However, its role in bladder cancer is still unknown. To evaluate the function of SKA1 in bladder cancer cells, the authors employed an RNA interference lentivirus system to deplete its expression in both BT5637 and T-24 bladder cancer cells. The cell proliferation was significantly decreased in both cell lines after SKA1 knockdown. Moreover, the colony formation capacity was impaired by SKA1 silencing. Flow cytometry analysis showed that depletion of SKA1 led to cell cycle arrest at S phase. Furthermore, knockdown of SKA1 in T-24 cells obviously downregulated the expressions of CDK4 and Cyclin D1, and alleviated the activations of ERK2 and AKT, conducive to cell growth inhibition. These findings suggested that knockdown of SKA1 could potently suppress bladder cancer cell proliferation in vitro and lentivirus-mediated silencing of SKA1 might serve as a novel strategy for gene therapy of bladder cancer.
Insights
Spindle and kinetochore-associated protein 1 (SKA1) knockdown inhibits bladder cancer cell proliferation and colony formation. Silencing SKA1 also causes cell cycle arrest and downregulates key growth-promoting proteins, suggesting its potential in bladder cancer gene therapy.
Area of Science:
- Cell Biology
- Molecular Oncology
- Cancer Genetics
Background:
- Spindle and kinetochore-associated protein 1 (SKA1) is crucial for chromosome segregation and implicated in various cancers.
- The role of SKA1 in bladder cancer progression remains largely unexplored.
- Understanding SKA1's function is vital for developing novel bladder cancer therapies.
Purpose of the Study:
- To investigate the functional role of SKA1 in bladder cancer cell lines.
- To evaluate the therapeutic potential of targeting SKA1 in bladder cancer.
Main Methods:
- Utilized RNA interference (RNAi) via a lentivirus system to deplete SKA1 expression in BT5637 and T-24 bladder cancer cells.
- Assessed cell proliferation, colony formation, and cell cycle progression using flow cytometry.
- Analyzed the expression levels of cell cycle regulators (CDK4, Cyclin D1) and signaling proteins (ERK2, AKT) post-SKA1 knockdown.
Main Results:
- SKA1 knockdown significantly reduced proliferation and colony formation in both bladder cancer cell lines.
- Depletion of SKA1 induced cell cycle arrest at the S phase.
- Silencing SKA1 downregulated CDK4 and Cyclin D1 expression and attenuated ERK2 and AKT activation, inhibiting cell growth.
Conclusions:
- SKA1 plays a significant role in promoting bladder cancer cell proliferation.
- Lentivirus-mediated SKA1 silencing demonstrates potent in vitro suppression of bladder cancer cells.
- Targeting SKA1 represents a promising novel strategy for bladder cancer gene therapy.
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