Resumo

SIMANCAS-ESCORCIA, Víctor; DIAZ-ROJAS, Kevin; DIAZ-CABALLERO, Antonio  e  CASTELLANOS-BERRIO, Patricia. Immunolocalization of cytokeratin 14, 19 and Ki-67 in the epithelium of patients with gingival overgrowth. Entramado [online]. 2023, vol.19, n.1, pp.176-185.  Epub 01-Maio-2023. ISSN 1900-3803.  https://doi.org/10.18041/1900-3803/entramado.1.8829.

During orthodontic treatment, unwanted pathological events such as gingival overgrowth induced by orthodontic treatment or gingival hypertrophy may appear The objective of this study is to identify immunohistochemical distribution of cytokeratin CK-14, CK-19 and Ki-67 in the gingival epithelium of patients with gingival overgrowth induced by orthodontic treatment. Thirteen patients were selected divided into: control group (n = 6), conformed of periodontally healthy individuals without orthodontic appliances and the test group (n = 7), conformed of patients with gingival overgrowth induced by orthodontic treatment. The biomarkers CK-14, CK-19 and Ki-67 were identified by immunohistochemistry with monoclonal antibodies and observed in a Leica DM 500 optical microscope. Hypertrophic epithelial tissue with loss of continuity of the basement membrane was found in the test group patients. CK-14 and CK-19 were positive in the epithelial tissue of all the subjects evaluated, with a high intensity positive expression in the cells of the basal lamina of the test group. The average number of cells positive for Ki-67 in test group was 56%. In conclusion, CK-14, CK-19 and Ki-67 are biomarkers with high immunoreactivity in the gingival tissue of patients with gingival overgrowth induced by orthodontic treatment.

Palavras-chave : Orthodontics; gingival overgrowth; intermediate filaments; keratin-14; keratin-I9; Ki-67 antigen.

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