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Published in: Clinical Oral Investigations 5/2016

01-06-2016 | Original Article

Short-term heat pre-treatment modulates the release of HMGB1 and pro-inflammatory cytokines in hPDL cells following mechanical loading and affects monocyte behavior

Authors: Michael Wolf, Stefan Lossdörfer, Piero Römer, Christian Kirschneck, Katharina Küpper, James Deschner, Andreas Jäger

Published in: Clinical Oral Investigations | Issue 5/2016

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Abstract

Objective

Heat shock proteins (HSP) act as cell-protective molecules that are upregulated upon thermal insult, hypoxia, and ischemia. Such ischemic conditions can be found during tissue remodeling associated with orthodontic tooth movement or trauma when compression forces lead to cell necrosis and subsequent clearance of cellular debris by immune competent cells. Host immune overreaction can result in undesired side effects such as tooth root resorption. Here, we analyzed whether heat pre-treatment would affect the initially catabolic host immune response induced by mechanical loading of human periodontal ligament (hPDL) cells, which represent major constituents of the tooth supporting apparatus involved in the regulation of periodontal remodeling.

Materials and methods

Fifth passage hPDL cells were exposed to an elevated temperature of 43° for 1 h prior to mechanical loading. Cell morphology, high mobility group box protein 1 (HMGB1), interleukin (IL)-6, and IL-8 expression were analyzed microscopically and by ELISA. The physiological relevance for monocyte behavior was tested in monocyte adhesion and osteoclast differentiation assays.

Results

Short-term heat pre-treatment did not show any visible effect on hPDL cell morphology, but resulted in a significant downregulation of pro-inflammatory cytokines when being additionally loaded mechanically. Supernatants of heat-exposed hPDL cell cultures demonstrated a reduced impact on monocyte adhesion and osteoclastic differentiation.

Conclusions

Heat pre-treatment of hPDL cells induces cell-protective mechanisms towards mechanical stress and favors the reduction of cell stress associated effects on monocyte/macrophage physiology.

Clinical relevance

These data present the induction of heat shock proteins as a promising treatment option to limit undesired side effects of periodontal remodeling.
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Metadata
Title
Short-term heat pre-treatment modulates the release of HMGB1 and pro-inflammatory cytokines in hPDL cells following mechanical loading and affects monocyte behavior
Authors
Michael Wolf
Stefan Lossdörfer
Piero Römer
Christian Kirschneck
Katharina Küpper
James Deschner
Andreas Jäger
Publication date
01-06-2016
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 5/2016
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-015-1580-7

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