Extracellular matrix alterations in the Peyronie's disease

Area of Science:

• Urology
• Biochemistry
• Pathology

Background:

• Peyronie's disease is defined by fibrous plaque in the tunica albuginea, leading to penile deformity.
• This condition can cause significant fertility issues and impacts penile structure.

Purpose of the Study:

• To investigate alterations in the extracellular matrix (ECM) in Peyronie's disease.
• To analyze the expression of key proteins and mRNA involved in ECM remodeling.

Main Methods:

• Surgical tissues from Peyronie's disease patients and cadaveric controls were used.
• Immunohistochemistry, digital quantification, agarose gel electrophoresis, and ELISA-like assays were employed.
• mRNA expression analysis was conducted for specific genes including syndecan-1, IL-6, and enzymes related to hyaluronic acid metabolism.

Main Results:

• Peyronie's tissues exhibited decreased apoptosis and reduced blood vessel density.
• Transforming growth factor-beta (TGF-β) and interleukin-6 (IL-6) levels were significantly higher.
• Heparanase expression increased, while matrix metalloproteinases (MMPs) showed no change.
• Chondroitin sulfate levels were significantly elevated (P=0.008), unlike hyaluronic acid, dermatan sulfate, and related enzymes.

Conclusions:

• Heparanases and specific sulfated glycosaminoglycans, particularly chondroitin sulfate, are implicated in ECM alterations in Peyronie's disease.
• Elevated TGF-β and IL-6 suggest inflammatory and fibrotic pathways are active.
• These findings contribute to understanding the molecular basis of Peyronie's disease pathophysiology.