Related Experiment Video
Updated: Jun 17, 2026
miRNA Expression Analyses in Prostate Cancer Clinical Tissues
Published on: September 8, 2015
[Gene profiling after knocking-down the expression of NS gene in prostate cancer PC-3 cells]
Ran-lu Liu1, Yong Xu, Zhi-hong Zhang
1Department of Urology, Second Hospital, Tianjin Medical University & Tianjin Institute of Urology, Tianjin 300211, China.
Objective:
To screen the genes and possible signal transduction pathways involved in the mechanism of nucleostemin (NS) in the proliferation of prostate cancer.
Methods:
Oligonucleotide DNA microarray was used to screen the genome changes after knocking-down expression of NS in PC-3 cells and quantitative real-time PCR was used to further confirm the important differentially expressed genes.
Results:
219 differentially expressed genes were found and theses genes were involved in cell cycle, cell proliferation, signal transduction, cell apoptosis and cell differentiation, etc. INK4 family genes (p15, p16, p18) were up-regulated and cyclin D1, HDAC1 were down-regulated, the main action points were CDK4/6-cyclin D and pRb-E2F1 complexes.
Conclusion:
NS may promote the progression of prostate cancer by inhibiting the expression of p15, p16, and p18 in PC-3 cells. NS is an important G(1)/S checkpoint regulator and its regulatory activity has been certified at gene level.
Insights
Nucleostemin (NS) promotes prostate cancer progression by downregulating cell cycle inhibitors like p15, p16, and p18. This study identifies NS as a key regulator of the G1/S checkpoint in prostate cancer cells.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Context:
- Prostate cancer is a significant health concern with complex underlying molecular mechanisms.
- Nucleostemin (NS) has been implicated in cancer cell proliferation, but its specific role in prostate cancer requires further elucidation.
Purpose:
- To identify genes and signaling pathways regulated by nucleostemin (NS) in prostate cancer cell proliferation.
- To investigate the mechanism by which NS influences prostate cancer progression.
Summary:
- Gene expression profiling using DNA microarray in PC-3 cells with NS knockdown revealed 219 differentially expressed genes.
- Upregulation of INK4 family genes (p15, p16, p18) and downregulation of cyclin D1 and HDAC1 were observed, implicating CDK4/6-cyclin D and pRb-E2F1 pathways.
- NS appears to promote prostate cancer by inhibiting key cell cycle inhibitors (p15, p16, p18), acting as a G1/S checkpoint regulator.
Impact:
- This research provides novel insights into the molecular underpinnings of prostate cancer growth.
- Identifying NS as a G1/S checkpoint regulator offers potential therapeutic targets for prostate cancer treatment.
