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HMGB1 localization during experimental periodontitis
Andressa Vilas Boas Nogueira1, João Antonio Chaves de Souza1, Rafael Scaf de Molon1
1Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Universidade Estadual Paulista (UNESP), Rua Humaitá, 1680, 2° Andar, Centro, 14801-903 Araraquara, SP, Brazil.
Mediators of Inflammation
|April 3, 2014
Summary
High mobility group box 1 (HMGB1) is produced by periodontal ligament cells and increases with inflammatory stimuli. This suggests HMGB1 may play a role in periodontitis development and progression.
Area of Science:
- Periodontal disease research
- Cellular biology
- Inflammation studies
Background:
- Periodontal ligament (PDL) cells are crucial for maintaining periodontal health.
- High mobility group box 1 (HMGB1) is a protein implicated in inflammatory processes.
- Understanding HMGB1's role in periodontitis is essential for developing targeted therapies.
Purpose of the Study:
- To investigate the expression of HMGB1 in murine periodontal ligament (mPDL) fibroblasts in vitro.
- To analyze HMGB1 expression in vivo during experimentally induced periodontitis in rats.
- To determine the association of HMGB1 with the onset and progression of periodontitis.
Main Methods:
- In vitro stimulation of mPDL fibroblasts with LPS or IL-1β.
- Induction of periodontitis in rats using ligature or LPS.
- Assessment of bone loss, inflammation, and HMGB1 expression via immunohistochemistry, qPCR, and Western blot.
Main Results:
- HMGB1 mRNA and protein expression significantly increased in mPDL cells following inflammatory stimulation.
- Elevated HMGB1 mRNA levels were observed in gingival tissues during periodontitis.
- Increased numbers of HMGB1-positive cells were detected in inflamed periodontal tissues.
Conclusions:
- PDL cells produce HMGB1, which is released extracellularly upon inflammatory stimulation.
- HMGB1 expression is upregulated during periodontitis.
- HMGB1 is potentially involved in the pathogenesis of periodontal tissue destruction, warranting further investigation.
