Suzuki Hideaki
   Department   School of Medicine  Otorhinolaryngology-Head and Neck Surgery, Clinical Medical Sciences
   Position  
Article types journal article
Language English
Peer review Peer reviewed
Title Expressions of TRPVs in the cholesteatoma epithelium.
Journal Formal name:Acta oto-laryngologica
Abbreviation:Acta Otolaryngol
ISSN code:16512251/00016489
Domestic / ForeginForegin
Volume, Issue, Page 137(10),1039-1045頁
Author and coauthor Do Ba Hung, Koizumi Hiroki, Ohbuchi Toyoaki, Kawaguchi Rintaro, Suzuki Hideaki
Publication date 2017/10
Summary OBJECTIVE:We have recently proposed a hypothesis that acid leakage through the cholesteatoma epithelium mediates bone resorption in middle ear cholesteatoma. In the present study, we investigated the expressions of transient receptor potential vanilloid (TRPV) channels, which have been shown to play roles in the regulation of epidermal barrier function, in the cholesteatoma epithelium in comparison with the normal skin.METHODS:Cholesteatoma epithelium and postauricular skin were collected from 17 patients with primary acquired middle ear cholesteatoma who underwent tympanomastoidectomy. Expressions of TRPV1, TRPV3, TRPV4, and TRPV6 were explored by fluorescence immunohistochemistry and quantitative reverse transcription-polymerase chain reaction (qRT-PCR).RESULTS:TRPV1, TRPV3, TRPV4, and TRPV6 mRNAs were all detected by qRT-PCR both in the skin and cholesteatoma tissue. Immunohistochemical staining showed that TRPV1 and TRPV3 were positive in the viable cell layers of the epidermis of the skin, and only TRPV3 was positive in those of the cholesteatoma epithelium. The immunoreactivity for TRPV3 was significantly weaker in cholesteatoma than in the skin.CONCLUSIONS:The lower expression of TRPV3 in cholesteatoma may be one of the mechanisms underlying the increased permeability of this tissue. On the other hand, TRPV1, TRPV4, and TRPV6 are unlikely to be involved in the regulation of epithelial permeability in cholesteatoma.
DOI 10.1080/00016489.2017.1336796
PMID 28599589