Related Experiment Video
Updated: Mar 17, 2026
Intracavernous Pressure Recording in a Cavernous Nerve Injury Rat Model
Published on: September 20, 2021
Gene expression profile comparison in the penile tissue of diabetes and cavernous nerve injury-induced erectile
Sung Chul Kam1, Sang Hoon Lee2, Ju Hong Jeon3
1Department of Urology, Gyeongsang National University Changwon Hospital, Gyeongsang National University School of Medicine, Changwon, Korea.
Purpose:
To investigate the effects of cavernous nerve injury (CNI) on gene expression profiles in the cavernosal tissue of a CNI-induced erectile dysfunction (ED) model and to provide a basis for future investigations to discover potential target genes for ED treatment.
Materials And Methods:
Young adult rats were divided randomly into 2 groups: sham operation and bilateral CN resection. At 12 weeks after CNI we measured erectile responses and performed microarray experiments and gene set enrichment analysis to reveal gene signatures that were enriched in the CNI-induced ED model. Alterations in gene signatures were compared with those in the diabetes-induced ED model. The diabetic-induced ED data is taken from GSE2457.
Results:
The mean ratio of intracavernosal pressure/blood pressure for the CNI group (0.54±0.4 cmH2O) was significantly lower than that in the sham operation group (0.73±0.8 cmH2O, p<0.05). Supervised and unsupervised clustering analysis showed that the diabetes- and CNI-induced ED cavernous tissues had different gene expression profiles from normal cavernous tissues. We identified 46 genes that were upregulated and 77 genes that were downregulated in both the CNI- and diabetes-induced ED models.
Conclusions:
Our genome-wide and computational studies provide the groundwork for understanding complex mechanisms and molecular signature changes in ED.
Insights
Cavernous nerve injury (CNI) causes erectile dysfunction (ED) by altering gene expression in penile tissues. This study identified specific gene signatures linked to CNI-induced ED, offering potential therapeutic targets.
Area of Science:
- Urology
- Molecular Biology
- Genomics
Background:
- Erectile dysfunction (ED) is a common condition with complex underlying mechanisms.
- Cavernous nerve injury (CNI) is a significant cause of ED.
- Understanding the molecular changes in penile tissue after CNI is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the impact of CNI on gene expression profiles in cavernosal tissue.
- To establish a CNI-induced ED rat model for molecular analysis.
- To identify potential therapeutic target genes for ED treatment.
Main Methods:
- Rats underwent either sham operation or bilateral cavernous nerve resection (CNI).
- Erectile function was assessed 12 weeks post-injury.
- Microarray experiments and gene set enrichment analysis were performed on cavernosal tissues.
Main Results:
- CNI significantly impaired erectile function compared to the sham group.
- Distinct gene expression profiles were observed in CNI-induced ED and normal cavernous tissues.
- A total of 46 genes were upregulated and 77 genes were downregulated in both CNI- and diabetes-induced ED models.
Conclusions:
- Genome-wide and computational analyses provide a foundation for understanding ED mechanisms.
- Identified gene signatures offer insights into molecular changes associated with CNI-induced ED.
- This research lays the groundwork for future investigations into novel ED therapies.
