Molecular imaging assessment of periodontitis lesions in an experimental mouse model

Hidetaka Ideguchi, Keisuke Yamashiro, Tadashi Yamamoto, Masayuki Shimoe, Shoichi Hongo, Shinsuke Kochi, Chiaki Yoshihara-Hirata, Hiroaki Aoyagi, Mari Kawamura, Shogo Takashiba

Research output: Contribution to journalArticle

Abstract

Objective: We aimed to evaluate molecular imaging as a novel diagnostic tool for mice periodontitis model induced by ligature and Porphyromonas gingivalis (Pg) inoculation. Materials and methods: Twelve female mice were assigned to the following groups: no treatment as control group (n = 4); periodontitis group induced by ligature and Pg as Pg group (n = 4); and Pg group treated with glycyrrhizinic acid (GA) as Pg + GA group (n = 4). All mice were administered a myeloperoxidase (MPO) activity-specific luminescent probe and observed using a charge-coupled device camera on day 14. Image analysis on all mice was conducted using software to determine the signal intensity of inflammation. Additionally, histological and radiographic evaluation for periodontal inflammation and bone resorption at the site of periodontitis, and quantitative enzyme-linked immunosorbent assay (ELISA) were conducted on three mice for each group. Each experiment was performed three times. Results: Levels of serum IgG antibody against P. gingivalis were significantly higher in the Pg than in the Pg + GA group. Histological analyses indicated that the number of osteoclasts and neutrophils were significantly lower in the Pg + GA than in the Pg group. Micro-CT image analysis indicated no difference in bone resorption between the Pg and Pg + GA groups. The signal intensity of MPO activity was detected on the complete craniofacial image; moreover, strong signal intensity was localized specifically at the periodontitis site in the ex vivo palate, with group-wise differences. Conclusions: Molecular imaging analysis based on MPO activity showed high sensitivity of detection of periodontal inflammation in mice. Clinical relevance: Molecular imaging analysis based on MPO activity has potential as a diagnostic tool for periodontitis.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalClinical Oral Investigations
DOIs
Publication statusAccepted/In press - Jun 6 2018

Fingerprint

Porphyromonas gingivalis
Molecular Imaging
Periodontitis
Theoretical Models
Glycyrrhizic Acid
Peroxidase
Bone Resorption
Inflammation
Ligation
Alveolar Bone Loss
Palate
Osteoclasts
Neutrophils
Software
Immunoglobulin G
Enzyme-Linked Immunosorbent Assay

Keywords

  • Glycyrrhizin
  • Inflammation
  • Molecular imaging
  • Myeloperoxidase
  • Periodontal examination
  • Periodontitis

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Molecular imaging assessment of periodontitis lesions in an experimental mouse model. / Ideguchi, Hidetaka; Yamashiro, Keisuke; Yamamoto, Tadashi; Shimoe, Masayuki; Hongo, Shoichi; Kochi, Shinsuke; Yoshihara-Hirata, Chiaki; Aoyagi, Hiroaki; Kawamura, Mari; Takashiba, Shogo.

In: Clinical Oral Investigations, 06.06.2018, p. 1-7.

Research output: Contribution to journalArticle

Ideguchi, Hidetaka ; Yamashiro, Keisuke ; Yamamoto, Tadashi ; Shimoe, Masayuki ; Hongo, Shoichi ; Kochi, Shinsuke ; Yoshihara-Hirata, Chiaki ; Aoyagi, Hiroaki ; Kawamura, Mari ; Takashiba, Shogo. / Molecular imaging assessment of periodontitis lesions in an experimental mouse model. In: Clinical Oral Investigations. 2018 ; pp. 1-7.
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abstract = "Objective: We aimed to evaluate molecular imaging as a novel diagnostic tool for mice periodontitis model induced by ligature and Porphyromonas gingivalis (Pg) inoculation. Materials and methods: Twelve female mice were assigned to the following groups: no treatment as control group (n = 4); periodontitis group induced by ligature and Pg as Pg group (n = 4); and Pg group treated with glycyrrhizinic acid (GA) as Pg + GA group (n = 4). All mice were administered a myeloperoxidase (MPO) activity-specific luminescent probe and observed using a charge-coupled device camera on day 14. Image analysis on all mice was conducted using software to determine the signal intensity of inflammation. Additionally, histological and radiographic evaluation for periodontal inflammation and bone resorption at the site of periodontitis, and quantitative enzyme-linked immunosorbent assay (ELISA) were conducted on three mice for each group. Each experiment was performed three times. Results: Levels of serum IgG antibody against P. gingivalis were significantly higher in the Pg than in the Pg + GA group. Histological analyses indicated that the number of osteoclasts and neutrophils were significantly lower in the Pg + GA than in the Pg group. Micro-CT image analysis indicated no difference in bone resorption between the Pg and Pg + GA groups. The signal intensity of MPO activity was detected on the complete craniofacial image; moreover, strong signal intensity was localized specifically at the periodontitis site in the ex vivo palate, with group-wise differences. Conclusions: Molecular imaging analysis based on MPO activity showed high sensitivity of detection of periodontal inflammation in mice. Clinical relevance: Molecular imaging analysis based on MPO activity has potential as a diagnostic tool for periodontitis.",
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AU - Ideguchi, Hidetaka

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AU - Hongo, Shoichi

AU - Kochi, Shinsuke

AU - Yoshihara-Hirata, Chiaki

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AU - Takashiba, Shogo

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AB - Objective: We aimed to evaluate molecular imaging as a novel diagnostic tool for mice periodontitis model induced by ligature and Porphyromonas gingivalis (Pg) inoculation. Materials and methods: Twelve female mice were assigned to the following groups: no treatment as control group (n = 4); periodontitis group induced by ligature and Pg as Pg group (n = 4); and Pg group treated with glycyrrhizinic acid (GA) as Pg + GA group (n = 4). All mice were administered a myeloperoxidase (MPO) activity-specific luminescent probe and observed using a charge-coupled device camera on day 14. Image analysis on all mice was conducted using software to determine the signal intensity of inflammation. Additionally, histological and radiographic evaluation for periodontal inflammation and bone resorption at the site of periodontitis, and quantitative enzyme-linked immunosorbent assay (ELISA) were conducted on three mice for each group. Each experiment was performed three times. Results: Levels of serum IgG antibody against P. gingivalis were significantly higher in the Pg than in the Pg + GA group. Histological analyses indicated that the number of osteoclasts and neutrophils were significantly lower in the Pg + GA than in the Pg group. Micro-CT image analysis indicated no difference in bone resorption between the Pg and Pg + GA groups. The signal intensity of MPO activity was detected on the complete craniofacial image; moreover, strong signal intensity was localized specifically at the periodontitis site in the ex vivo palate, with group-wise differences. Conclusions: Molecular imaging analysis based on MPO activity showed high sensitivity of detection of periodontal inflammation in mice. Clinical relevance: Molecular imaging analysis based on MPO activity has potential as a diagnostic tool for periodontitis.

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