Localisation of basic fibroblast growth factor in cholesteatoma matrix: an immunochemical study

Area of Science:

• Otolaryngology
• Cell Biology
• Biochemistry

Background:

• Human acquired cholesteatoma is a destructive epithelial growth.
• The role of growth factors in cholesteatoma pathogenesis requires further investigation.

Purpose of the Study:

• To compare the expression of basic fibroblast growth factor (bFGF) in cholesteatoma matrix versus deep meatal skin.
• To elucidate the potential role of bFGF in cholesteatoma.

Main Methods:

• Immunochemical analysis of cholesteatoma tissues (n=19) and deep meatal skin controls (n=8).
• Quantitative assessment of bFGF expression levels.

Main Results:

• Significantly higher bFGF expression in cholesteatoma (58.53 ± 3.6%) compared to skin (40.6 ± 3.5%; p=0.005).
• bFGF staining observed in basal and parabasal keratinocytes, middle-ear epithelium, and mast cell membranes.

Conclusions:

• Overexpression of bFGF in cholesteatoma matrix indicates its involvement in proliferative activity.
• bFGF expression in mast cells suggests a role in cholesteatoma-associated bone resorption.