Update on Oral Pathology: Research ArticlesImmunoexpression of Apoptosis and Cell-cycle Arrest Markers in Oral Lichen PlanusPérez-Sayáns, Mario PhD, DDS*; Lorenzo-Pouso, Alejandro I. DDS*; Chamorro-Petronacci, Cintia M. PhD, DDS*; Suárez-Peñaranda, José M. MD, PhD†,‡; Padín-Iruegas, Elena MD, PhD§; González-Moles, Miguel A. MD, PhD∥; Marichalar-Mendía, Xabier PhD¶; García-García, Abel MD, PhD*; Blanco-Carrión, Andrés MD, PhD, DDS*Author Information *Oral Medicine, Oral Surgery, and Implantology Unit (MedOralRes), Faculty of Medicine and Dentistry, Health Research Institute of Santiago de Compostela (IDIS) †Department of Forensic Sciences and Pathology, University of Santiago de Compostela ‡Department of Pathology, University Hospital of Santiago (CHUS), Santiago de Compostela §Human Anatomy and Embryology Area, Department of Functional Biology and Health Sciences, Faculty of Physiotherapy, Vigo University, Pontevedra ∥School of Dentistry, Biomedicine Institute of Granada, University of Granada, Granada ¶Oral Medicine & Pathology, Department of Stomatology II, UFI 11/25, University of the Basque Country (UPV/EHU), Leioa, Spain The authors declare no conflict of interest. Reprints: Mario Pérez-Sayáns, PhD, DDS, Oral Medicine, Oral Surgery, and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Universidade de Santiago de Compostela, Entrerríos s/n, Santiago de Compostela C.P. 15782, Spain (e-mail: [email protected]). Applied Immunohistochemistry & Molecular Morphology: May/June 2021 - Volume 29 - Issue 5 - p 374-381 doi: 10.1097/PAI.0000000000000876 Buy Metrics Abstract The expression pattern of a panel of 5 molecular markers (p53, cyclin D1, Ki-67, BCL-2, and BAX) was studied in samples from patients with oral lichen planus (OLP) and normal oral mucosa (NOM) of healthy controls to investigate the implications of cell cycle and apoptosis in OLP. The 59 OLP and 16 NOM biopsies were stained by an inmunoperoxidase technique for p53, cyclin D1, Ki-67, BCL-2, and BAX and assessed microscopically for semiquantitative analysis. Positivity for BCL-2 and Ki-67 was significantly more frequent in NOM than in OLP (P<0.05). p53 levels were upregulated in atrophic/erosive clinical presentations when compared with reticular presentations and in cases with discontinued inflammatory infiltrate. Multivariate analysis through logistic regression showed that BCL-2 in OLP versus NOM was the only significantly altered marker in the present cohort (adjusted odds ratio=12.42; 95% confidence interval: 2.5-61.65; P=0.002). The cell patterns in OLP and NOM are distinct according to the present molecular markers panel. The presence of BCL-2 altered expression may be related to various molecular pathways that connect/link this condition to other autoimmune disorders and also may be involved in complex roles that evoke malignant transformation of OLP. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.