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01-04-2018 | Original Article

Influence of obesity on experimental periodontitis in rats: histopathological, histometric and immunohistochemical study

Authors: Elizangela Partata Zuza, Valdir Gouveia Garcia, Letícia Helena Theodoro, Edilson Ervolino, Luiz Fernando Veloso Favero, Mariéllen Longo, Fernando Salimon Ribeiro, Alex Tadeu Martins, Luís Carlos Spolidorio, José Antônio Sampaio Zuanon, Benedicto Egbert Corrêa de Toledo, Juliana Rico Pires

Published in: Clinical Oral Investigations | Issue 3/2018

Abstract

Objectives

This study assessed the influence of obesity on the progression of ligature-induced periodontitis in rats.

Materials and methods

Forty-eight adult Wistar rats were randomly divided into two groups: the HL group (n = 24) was fed high-fat animal food to induce obesity, and the NL group (n = 24) was fed normolipidic animal food. Obesity was induced within a period of 120 days, and the induction of experimental periodontitis (EP) was subsequently performed for 30 days. The animals were euthanized after 7, 15, and 30 days, and the jaws were removed for histopathological, histometric, and immunohistochemical analyses. Tartrate-resistant acid phosphatase (TRAP), receptor activator of nuclear factor kappa beta ligand (RANKL), and osteoprotegerin (OPG) were analyzed via immunolabeling.

Results

Histological findings indicated that the inflammation was more extensive and lasted longer in the HL⁄EP; however, advanced destruction also occurred in the NL/EP. Greater bone loss was verified in the HL/EP group (2.28 ± 0.35) in the period of 7 days than in the NL/EP group (1.2 ± 0.29). High immunolabeling was identified in the HL/EP group in the initial periods for RANKL and TRAP, whereas the NL⁄EP group presented with moderate immunolabeling for both factors. The HL/EP and NL/EP groups showed low immunolabeling for OPG.

Conclusions

Obesity induced by a high-fat diet influenced alveolar bone metabolism when associated with experimental periodontitis and caused a more severe local inflammatory response and alveolar bone loss.

Clinical relevance

Obesity is related to greater alveolar bone loss and an accentuated local inflammatory response, which may be reflected in the clinical severity of periodontitis and dental loss.

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Title: Influence of obesity on experimental periodontitis in rats: histopathological, histometric and immunohistochemical study
Authors: Elizangela Partata Zuza
Valdir Gouveia Garcia
Letícia Helena Theodoro
Edilson Ervolino
Luiz Fernando Veloso Favero
Mariéllen Longo
Fernando Salimon Ribeiro
Alex Tadeu Martins
Luís Carlos Spolidorio
José Antônio Sampaio Zuanon
Benedicto Egbert Corrêa de Toledo
Juliana Rico Pires
Publication date: 01-04-2018
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 3/2018
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-017-2207-y

At a glance: The STEP trials

Springer Medicine

Influence of obesity on experimental periodontitis in rats: histopathological, histometric and immunohistochemical study

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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