Expression of CYLD and NF-κB in Human Cholesteatoma Epithelium

Abstract EN

The tumor suppressor CYLD is a deubiquitinating enzyme that inhibits activation of the NF-κB, which has key roles in inflammation and apoptosis.

We hypothesized that CYLD may regulate the NF-κB signaling pathway in cholesteatoma.

We conducted immunohistochemistry to examine the expression of CYLD and NF-κB in 16 cases of cholesteatoma and paired cases of retroauricular (RA) skin.

In cholesteatoma epithelium, activated NF-κ B expression was significantly higher than in RA skin, whereas CYLD expression was significantly lower in cholesteatoma epithelium than in RA skin (P<.05).

Furthermore, a significant inverse correlation was detected between CYLD and activated NF-κB expression in cholesteatoma epithelium (r=-0.630).

We found that CYLD reduced and activated increased NF-κB in cholesteatoma epithelium in comparison to RA skin.

The inverse correlation between CYLD and activated NF-κB in cholesteatoma may be involved in cholesteatoma epithelial hyperplasia.