Angiogenesis in the pathogenesis of pterygium

Area of Science:

• Ophthalmology
• Pathology
• Angiogenesis Research

Background:

• Pterygium is characterized by epithelial hyperplasia and fibro-vascular growth.
• It involves cellular proliferation, tissue remodeling, angiogenesis, and inflammation.
• Understanding the role of angiogenesis is crucial for pterygium pathogenesis.

Purpose of the Study:

• To investigate the involvement of angiogenesis in pterygium development.
• To analyze vascularization and proangiogenic factors in pterygium tissue.

Main Methods:

• Surgical removal of 21 pterygium fragments and 10 conjunctival control tissues.
• Histological processing using paraffin inclusion.
• Immunohistochemical analysis using CD31 (vascular endothelium marker) and VEGF (proangiogenic factor marker) with ABC/HRP technique.

Main Results:

• Pterygium tissue exhibited significantly richer vascularization compared to normal conjunctiva.
• Neoangiogenesis was prominent in the subepithelial connective tissue, supporting the proliferating epithelium.
• Blood vessels in pterygium were small, branched, and often had a poorly defined lumen.
• Intense angiogenesis and overexpression of VEGF were observed, particularly in proliferating pterygium structures.

Conclusions:

• The study confirms intense angiogenesis in pterygium development.
• Overexpression of VEGF strongly suggests its pathogenic involvement in pterygium formation.
• Targeting angiogenesis and VEGF may offer therapeutic strategies for pterygium.