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Impaired Junctions and Invaded Macrophages in Oral Epithelia With Oral Pain.

Authors :
Yoshimoto, Reiko U.
Aijima, Reona
Ohyama, Yukiko
Yoshizumi, Junko
Kitsuki, Tomoko
Ohsaki, Yasuyoshi
Cao, Ai-Lin
Danjo, Atsushi
Yamashita, Yoshio
Kiyoshima, Tamotsu
Kido, Mizuho A.
Source :
Journal of Histochemistry & Cytochemistry; Apr2019, Vol. 67 Issue 4, p245-256, 12p
Publication Year :
2019

Abstract

Recurrent or chronic oral pain is a great burden for patients. Recently, the links between epithelial barrier loss and disease were extended to include initiation and propagation. To explore the effects of pathohistological changes in oral epithelia on pain, we utilized labial mucosa samples in diagnostic labial gland biopsies from patients with suspected Sjögren's syndrome (SS), because they frequently experience pain and discomfort. In most labial mucosa samples from patients diagnosed with SS, disseminated epithelial cellular edema was prevalent as ballooning degeneration. The disrupted epithelia contained larger numbers of infiltrating macrophages in patients with oral pain than in patients without pain. Immunohistochemistry revealed that edematous areas were distinct from normal areas, with disarranged cell–cell adhesion molecules (filamentous actin, E-cadherin, β-catenin). Furthermore, edematous areas were devoid of immunostaining for transient receptor potential channel vanilloid 4 (TRPV4), a key molecule in adherens junctions. In an investigation on whether impaired TRPV4 affect cell–cell adhesion, calcium stimulation induced intimate cell–cell contacts among oral epithelial cells from wild-type mice, while intercellular spaces were apparent in cells from TRPV4-knockout mice. The present findings highlight the relationship between macrophages and epithelia in oral pain processing, and identify TRPV4-mediated cell–cell contacts as a possible target for pain treatment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00221554
Volume :
67
Issue :
4
Database :
Complementary Index
Journal :
Journal of Histochemistry & Cytochemistry
Publication Type :
Academic Journal
Accession number :
139960174
Full Text :
https://doi.org/10.1369/0022155418812405