Localization of interleukin-6 signaling complex in epithelialized apical lesions of endodontic origin

Springer Science and Business Media LLC - Tập 25 - Trang 4075-4083 - 2021
C. Schweitzer1,2, M. Garrido2, R. Paredes3, C. Stoore3, M. Reyes1, R. Bologna-Molina4, A. Fernández2,5, Marcela Hernández Rios1,2
1Department of Oral Pathology and Medicine, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
2Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
3Faculty of Veterinary Medicine, Faculty of Life Sciences, Universidad Andrés Bello, Santiago, Chile
4Faculty of Dentistry, Universidad de la República, Montevideo, Uruguay
5Faculty of Dentistry, Universidad Andrés Bello, Santiago, Chile

Tóm tắt

We aimed to determine the immunolocalization patterns of the interleukin (IL)-6 signaling complex in epithelialized and non-epithelialized apical lesions of endodontic origin (ALEOs). Epithelialized (n = 8) and non-epithelialized (n = 7) ALEOs were obtained from teeth with indication of extraction in patients with clinical diagnosis of apical periodontitis. All tissues were subjected to routine processing for histopathologic examination and primary antibodies for IL-6, IL-6 receptor (R), and glycoprotein (gp)-130 were used for immunohistochemistry and double immunofluorescence co-localization. IL-6, IL-6R, and gp-130 were immunolocalized in endothelial cells and mononuclear leukocytes in a diffuse pattern within the connective tissue of epithelialized and non-epithelialized ALEOs. In the epithelialized lesions, two different patterns were identified: IL-6 signaling complex was localized within the proliferating epithelium in a diffuse intracellular pattern and in a cell membrane localization pattern within the mature epithelial lining, showing a decreased intensity towards the surface layers. IL-6, IL-6R, and gp-130 localized to mononuclear inflammatory cells, vascular endothelial cells, and immature proliferating epithelia in a diffuse pattern and in mature lining epithelia in a localized cell membrane pattern, supporting a role for epithelial proliferation during cyst formation. Additional cell membrane co-localization of IL-6 receptor complex suggests classic signaling involvement in addition to trans-signaling.

Tài liệu tham khảo

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