Abstract
Satellite glial cells (SGCs), a peripheral neuroglial cell, surround neurons and form a complete envelope around individual sensory neurons in the trigeminal ganglia (TG), which may be involved in modulating neurons in inflammation. The purpose of this study was to determine the effect of dental injury and inflammation on SGCs in the TG. Pulp exposure (PX) was performed on the first maxillary molar of 28 rats. The neurons innervating injured tooth in TG were labeled by the retrograde transport of fluoro-gold (FG). Specimens were collected at 1, 3, 7, 14, 21 and 28 days after PX and stained immunohistochemically for glial fibrillary acid protein (GFAP), a marker of SGCs activation, in the TG. We observed that GFAP-immunoreactivity (IR) SGCs enclosed FG-labeled neurons increased in a time-dependent manner after PX. The neurons surrounded by GFAP-IR SGCs were mainly small and medium in size. The GFAP-IR SGCs encircled neurons increased significantly in the maxillary nerve region of the TG at 7–28 days following PX. The results show that dental injury and inflammation induced SGCs activation in the TG. It indicates that activation of SGCs might be implicated in the peripheral mechanisms of pain following dental injury and inflammation.
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Acknowledgements
We are thankful to Miss ** Shen for drawing picture. This work is supported in part by the National Natural Science Foundation of China (Nos. 81470760, 81541153 and 81771098) and Guangdong Provincial Research Project of Science and Technology (Nos. 2016A050503046 and 2015A050502048).
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Liu, H., Zhao, L., Gu, W. et al. Activation of satellite glial cells in trigeminal ganglion following dental injury and inflammation. J Mol Hist 49, 257–263 (2018). https://doi.org/10.1007/s10735-018-9765-4
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DOI: https://doi.org/10.1007/s10735-018-9765-4