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Loss of Aβ-nerve endings associated with the Merkel cell-neurite complex in the lesional oral mucosa epithelium of lichen planus and hyperkeratosis

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International Journal of Oral Science 2016年第1期8卷 32-38页

作者： Daniela Calderon Carrion Yiiksel Korkmaz Britta Cho Marion Kopp Wilhelm Bloch Klaus Addicks Wilhelm Niedermeier Department of Prosthetic Dentistry Dental SchoolUniversity of CologneCologneGermany Center for Biochemistry Institute for Experimental Dental Research and Oral Musculoskeletal BiologyMedical FacultyUniversity of CologneCologneGermany Department of Anatomy University of CologneCologneGermany Department of Molecular and Cellular Sport Medicine German Sport UniversityCologneGermany

The Merkel cell-neurite complex initiates the perception of touch and mediates Ap slowly adapting type I responses. Lichen planus is a chronic inflammatory autoimmune disease with T-cell-mediated inflammation, whereas hyperkeratosis is characterized with or without epithelial dysplasia in the oral mucosa. To determine the effects of lichen planus and hyperkeratosis on the Merkel cell-neurite complex, healthy oral mucosal epithelium and lesional oral mucosal epithelium of lichen planus and hyperkeratosis patients were stained by immunohistochemistry （the avidin-biotin-peroxidase complex and double immunofluorescence methods）using pan cytokeratin, cytokeratin 20 （K20, a Merkel cell marker）, and neurofilament 200 （NF200, a myelinated Aβ- and Aδ-nerve fibre marker） antibodies. N F200-immunoreactive （ir） nerve fibres in healthy tissues and in the lesional oral mucosa epithelium of lichen planus and hyperkeratosis were counted and statistically analysed. In the healthy oral mucosa, K20-positive Merkel cells with and without close association to the intraepithelial NF200-ir nerve fibres were detected. In the lesional oral mucosa of lichen planus and hyperkeratosis patients, extremely rare NF200-ir nerve fibres were detected only in the lamina propria. Compared with healthy tissues, lichen planus and hyperkeratosis tissues had significantly decreased numbers of NF200-ir nerve fibres in the oral mucosal epithelium. Lichen planus and hyperkeratosis were associated with the absence of Aβ-nerve endings in the oral mucosal epithelium. Thus, we conclude that mechanosensation mediated by the Merkel cell-neurite complex in the oral mucosal epithelium is impaired in lichen planus and hvperkeratosis.

关键词： aβ-nerve fibres hyperkeratosis lichen planus mechanosensation Merkel cell-neurite complex

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