Volume 20, Issue 5 pp. 490-498
Original Article

Mitochondrial polymorphisms and dysfunction related to aggressive periodontitis: a pilot study

X Wang

X Wang

Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China

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Q Luan

Corresponding Author

Q Luan

Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China

Correspondence: Qingxian Luan, Department of Periodontology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, China. Tel: +8610 82195497, Fax: +8610 62173402, E-mail: [email protected]Search for more papers by this author
Q Chen

Q Chen

State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, China

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L Zhao

L Zhao

State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, China

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Y Guo

Y Guo

Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China

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First published: 09 July 2013
Citations: 11

Abstract

Aim

To investigate whether aggressive periodontitis (AgP) is associated with specific mtDNA polymorphisms or point mutations and furthermore whether mitochondrial dysfunction occurs in gingival fibroblasts of AgP patients.

Materials and methods

The mitochondrial DNA coding regions were amplified and sequenced in 22 overlapped fragments in 34 patients with AgP and 28 healthy controls for initial screening. We selected eleven SNPs for detailed investigation in the rest 30 AgP patients and 26 healthy controls, because all other variants occurred at relatively low frequencies or had no difference between two groups. Logistic regression models were used to analyze the association between mtDNA variants and AgP. Gingival fibroblasts were cultured from four patients with AgP and four healthy controls, and then mitochondrial membrane potential, reactive oxygen species production and cell proliferation were analyzed.

Results

Significant association was observed between aggressive periodontitis and eight mitochondrial polymorphisms: ‘8701A-9540T-10400C-10873T-14783T-15043G-15301G’ (OR = 3.471 (1.610–7.483), = 0.001) and 10398A (OR = 3.238 (1.481–7.078), = 0.003). Compared with the controls, patients with aggressive periodontitis had a decrease in mitochondrial membrane potential and an increase in reactive oxygen species production.

Conclusion

In conclusion, we propose that mitochondrial dysfunction and ‘8701A-9540T-10400C-10873T-14783T-15043G-15301G, 10398A’ are associated with and may increase the susceptibility to AgP in the Han Chinese population.

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