J Audiol Otol.  2020 Oct;24(4):191-197. 10.7874/jao.2020.00108.

Comparison of Autophagy mRNA Expression between Chronic Otitis Media With and Without Cholesteatoma

• Jung J
• Jung SY
• Kim MG
• Kim YI
• Kim SH
• Yeo SG

• KMID: 2507898
• DOI: http://doi.org/10.7874/jao.2020.00108

Abstract

Background and Objectives
Autophagy is known to be associated with pathogen infection. However, the expression of autophagy-related proteins has not been studied in chronic otitis media without cholesteatoma (COM) or with cholesteatoma (CholeOM). This study aimed to determine whether there is a difference between COM and CholeOM in autophagy-related gene mRNA expression.
Subjects and Methods
For 47 patients with chronic otitis media, the inflammatory tissues were classified into granulation tissue (COM) or cholesteatoma (CholeOM) according to biopsy results.
Results
PI3K mRNA expression (COM vs. CholeOM, mean±SD, 0.009±0.010 vs. 0.003±0.004; p=0.004) was lower, whereas Beclin-1 mRNA expression (0.089±0.107 vs. 0.176±0.163; p=0.034) was higher in the CholeOM group. Expression of PI3K mRNA in the CholeOM group was lower than that in the COM subgroups with presence of bacteria (0.022±0.019 vs. 0.001±0.001; p=0.001), otorrhea (0.049±0.068 vs. 0.003±0.004; p=0.004), and hearing loss over 40 dB (0.083±0.130 vs. 0.003±0.004; p=0.005).
Conclusions
The data suggested that different autophagy proteins play important roles in chronic otitis media according to the presence or absence of cholesteatoma.

Keyword

Autophagy; Otitis media; Cholesteatoma