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Updated: Jun 7, 2026

RNA Interference-based Investigation of the Function of Heat Shock Protein 27 during Corneal Epithelial Wound Healing
Published on: September 27, 2016
[Effects of small interfering RNA approach to silence the connective tissue growth factor gene on the expression of
Hong Chen1, Ming-chang Zhang, Hong-xu Zhang
1Department of Ophthalmology, Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Objective:
To investigate the effects of the small interfering RNA (siRNA) approach to silence the expression of connective tissue growth factor (CTGF) gene expression on the expression of the protein p27.
Methods:
Experimental research. The specific siRNA of CTGF was designed and synthesized, then transfected into cultured bovine corneal endothelial cells by liposomes. The blank control group was only treated with the culture medium and not be transfected with siRNA. Reverse transfection-polymerase chain reaction (RT-PCR) was applied to show the effect of gene-silencing, and western blot was used to observe the protein p27 expression of bovine corneal endothelial cells, which were treated with 1.00 µg/L transforming growth factor β(2) (TGF-β(2)). The results were analyzed by one-factor analysis of variance.
Results:
CTGF siRNA was successfully transfected into cultured bovine corneal endothelial cells and effectively silence the expression of CTGF mRNA. The CTGF mRNA expression decreased to 17.3%, 24.4% and 41.7% of control values at 24, 48 and 72 h after transfection, there was significant difference between these groups (F = 389.9, P < 0.05). Significant decrease of protein p27 expression was detected at 36 h after transfection (F = 299.3, P < 0.05).
Conclusion:
CTGF-specific siRNA was able to inhibit the expression of CTGF mRNA effectively and down-regulate the expression of p27.
Insights
Small interfering RNA (siRNA) targeting connective tissue growth factor (CTGF) effectively silenced CTGF gene expression in bovine corneal endothelial cells. This silencing led to a significant down-regulation of the p27 protein.
Area of Science:
- Molecular biology
- Gene silencing techniques
- Cell biology
Context:
- Connective tissue growth factor (CTGF) plays a role in cellular processes.
- Understanding CTGF's role in corneal endothelial cells is crucial.
- Protein p27 is a key regulator of the cell cycle.
Purpose:
- To investigate the effect of silencing connective tissue growth factor (CTGF) gene expression using small interfering RNA (siRNA).
- To determine the impact of CTGF gene silencing on the expression of the p27 protein in bovine corneal endothelial cells.
Summary:
- Specific siRNA targeting CTGF was designed and transfected into cultured bovine corneal endothelial cells.
- Reverse transcription-polymerase chain reaction (RT-PCR) confirmed effective CTGF mRNA silencing, reducing expression to 17.3-41.7% of control values.
- Western blot analysis revealed a significant decrease in p27 protein expression following CTGF siRNA transfection.
Impact:
- CTGF-specific siRNA demonstrates efficacy in inhibiting CTGF mRNA expression.
- The study shows that CTGF gene silencing down-regulates p27 protein expression.
- This research provides insights into the regulatory relationship between CTGF and p27 in corneal endothelial cells.
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