Cellular Expression of Epigenetic Markers and Oxidative Stress in Periodontitis Lesions of Smokers and Non-smokers

Overview

Journal J Periodontal Res

Specialty Dentistry

Date 2022 Jun 29

PMID 35766184

Authors

Carlotta Dionigi

Lena Larsson

Julia C Difloe-Geisert

Nicola U Zitzmann

Tord Berglundh

Affiliations

Soon will be listed here.

Abstract

Objective: To evaluate differences in the cellular expression of epigenetic markers and oxidative stress in periodontitis lesions between current smokers and non-smokers.

Background: Tobacco smoking is recognized as one of the major risk factors for periodontitis. However, the mechanisms by which smoking affects the progression of the disease remain to be determined.

Methods: Twenty-five current smokers and 21 non-smokers with generalized severe periodontitis were included. From each patient, one soft tissue biopsy from a periodontitis site was harvested and prepared for histological analysis. The infiltrated connective tissue (ICT) was selected as the region of interest to assess the cellular expression of epigenetic markers and reactive oxygen/nitrogen species (RONS) by immunohistochemistry.

Results: Although the ICT of smokers and non-smokers did not differ in size or in the expression of markers for DNA damage or oxidative stress, current smokers presented with significantly lower area proportions and densities of cells positive for the epigenetic markers DNMT1 and AcH3. In addition, periodontitis lesions in current smokers presented with a diminished antimicrobial activity, as indicated by significantly lower densities and area proportions of NOX2- and iNOS-positive cells.

Conclusions: Components of the host response and epigenetic mechanisms in periodontitis lesions in smokers are downregulated as opposed to lesions of non-smokers.

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Cellular expression of epigenetic markers and oxidative stress in periodontitis lesions of smokers and non-smokers.

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