Abstract
Objectives
Complement is an efficient plasma immune surveillance system. It initiates inflammation by inducing vascular modifications and attracting immune cells expressing Complement receptors. Investigating Complement receptors in non-immune cells pointed out Complement implication in the regeneration of tissue such as liver, skin, or bone. This review will shed the light on Complement implication in the initial steps of dental tissue regeneration.
Materials and methods
Review of literature was conducted on Complement local expression and implication in oral tissue regeneration in vivo and in vitro.
Results
Recent data reported expression of Complement receptors and soluble proteins in dental tissues. Cultured pulp fibroblasts secrete all Complement components. Complement C3b and MAC have been shown to control bacteria growth in the dental pulp while C3a and C5a are involved in the initial steps of pulp regeneration. Indeed, C3a induces pulp stem cell/fibroblast proliferation, and fibroblast recruitment, while C5a induces neurite growth, guides stem cell recruitment, and odontoblastic differentiation. Similarly, cultured periodontal ligament cells produce C5a which induces bone marrow mesenchymal stem cell recruitment.
Conclusions
Overall, this review highlights that local Complement synthesis in dental tissues plays a major role, not only in eliminating bacteria but also in the initial steps of dental tissue regeneration, thus providing a link between dental tissue inflammation and regeneration.
Clinical relevance
Complement provides an explanation for understanding why inflammation preceeds regeneration. This may also provide a biological rational for understanding the reported success conservative management of mature permanent teeth with carious pulp exposure.
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This work was supported by Aix-Marseille University and CNRS.
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Bergmann, M., Jeanneau, C., Giraud, T. et al. Complement activation links inflammation to dental tissue regeneration. Clin Oral Invest 24, 4185–4196 (2020). https://doi.org/10.1007/s00784-020-03621-w
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DOI: https://doi.org/10.1007/s00784-020-03621-w