Related Experiment Videos
Immunohistochemical and quantitative study of mast cells in La Peyronie's disease
O Leopardi1, F Colombo, B Frigo
1Department of Pathology, Ospedale Maggiore, Lodi, Italy.
Objective:
In order to investigate the possible association between mast cells (MCs) and the fibrous plaque of La Peyronie's disease, the number of MCs in normal penile tissue and in the fibrous plaque was determined.
Methods:
The control group consisted of 5 total and 3 partial penectomies with no fibrotic lesions, while the study group consisted of 23 excisional biopsies from cases of La Peyronie's disease dating back to at least 2 years earlier and with no signs of activity. The biopsies included tissues from the tunica albuginea (TA), the areolar tissue (Br) between the tunica and the erectile tissue (CC) and from the latter. The number of MCs was counted with the aid of an image analysis program following staining the antibody antitryptase.
Results:
In the cases of La Peyronie's disease the number of MCs/mm(2) was significantly higher in the TA and Br but lower in the CC. The MCs were related to fibroblasts and vasculonervous channels in the TA, and were concentrated around the fibrous plaques and granulation tissue between the TA and BR and between the latter and the CC.
Conclusion:
Our data indicate that MCs have a role in the genesis of the fibrous plaque in the TA and in the persistent inflammation in the Br. Medical treatment aimed at repressing MC activation and proliferation locally might be useful in La Peyronie's disease.
Insights
Mast cells (MCs) are significantly increased in the tunica albuginea and areolar tissue but decreased in the corpus cavernosum of patients with La Peyronie
Area of Science:
- Urology
- Pathology
- Immunology
Background:
- La Peyronie's disease is characterized by fibrous plaque formation in the tunica albuginea.
- The role of mast cells (MCs) in the pathogenesis of this condition remains unclear.
Purpose of the Study:
- To investigate the association between mast cells and the fibrous plaque in La Peyronie's disease.
- To quantify mast cell numbers in normal penile tissue versus diseased tissue.
Main Methods:
- Biopsies from 23 La Peyronie's disease patients and controls were analyzed.
- Mast cells were quantified using antitryptase staining and image analysis.
- Tissues analyzed included tunica albuginea, areolar tissue, and corpus cavernosum.
Main Results:
- Mast cell density was significantly higher in the tunica albuginea and areolar tissue of La Peyronie's disease patients.
- Mast cell density was lower in the corpus cavernosum of affected individuals.
- MCs were observed near fibroblasts and blood vessels in the tunica albuginea and around fibrous plaques.
Conclusions:
- Mast cells likely contribute to fibrous plaque development in the tunica albuginea and persistent inflammation in the areolar tissue.
- Targeting mast cell activation and proliferation may offer a therapeutic strategy for La Peyronie's disease.