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Association of microRNA 146 with middle ear hyperplasia in pediatric otitis media. Int J Pediatr Otorhinolaryngol 2016 Sep;88:104-8

Date

08/09/2016

Pubmed ID

27497395

Pubmed Central ID

PMC4978186

DOI

10.1016/j.ijporl.2016.06.056

Scopus ID

2-s2.0-84979086846   8 Citations

Abstract

OBJECTIVE: Toll-like receptor signaling activated by bacterial otitis media pathogens in the middle ear has been shown to play a key role in OM susceptibility, pathogenesis and recovery. Recent studies implicate microRNA 146 (miR-146) in regulation of inflammation via negative feedback of toll-like receptor signaling (TLR) in a wide variety of tissues, however its involvement in otitis media is unknown.

METHODS: Human middle ear epithelial cells were stimulated with proinflammatory cytokines, interleukin 1 beta or tumor necrosis factor alpha, for two to twenty-four hours. Middle ear biopsies were collected from children with otitis media with effusion (n = 20), recurrent otitis media (n = 9), and control subjects undergoing cochlear implantation (n = 10). miR-146a, miR-146b expression was assayed by quantitative PCR (qPCR). Expression of miR-146 targets involved in TLR signaling, IRAK1 and TRAF6, was assayed by qPCR in middle ear biopsies. Middle ear biopsies were cryosectioned and epithelial thickness measured by a certified pathologist.

RESULTS: Proinflammatory cytokines induced expression of miR-146 in middle ear epithelial cells in vitro. Middle ear miR-146a and miR-146b expression was elevated in otitis media patients relative to control subjects and correlated with middle ear epithelial thickness. A trend towards inverse correlation was observed between miR-146 and TRAF6 expression in the clinical population.

CONCLUSIONS: This report is the first to assess miRNA expression in a clinical population with OM. Findings herein suggest miR-146 may play a role in OM.

Author List

Samuels TL, Yan J, Khampang P, MacKinnon A, Hong W, Johnston N, Kerschner JE

Authors

Wenzhou Hong DVM, PhD Assistant Professor in the Otolaryngology department at Medical College of Wisconsin
Nikki Johnston PhD Associate Professor in the Otolaryngology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Cells, Cultured
Child
Child, Preschool
Ear, Middle
Epithelial Cells
Female
Humans
Hyperplasia
In Vitro Techniques
Infant
Inflammation
Interleukin-1 Receptor-Associated Kinases
Interleukin-1beta
Male
MicroRNAs
Otitis Media
Otitis Media with Effusion
Signal Transduction
TNF Receptor-Associated Factor 6
Toll-Like Receptors
Tumor Necrosis Factor-alpha
jenkins-FCD Prod-480 9a4deaf152b0b06dd18151814fff2e18f6c05280