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Open Access 01-10-2018 | Original Article

Gene expression profiles in dental follicles from patients with impacted canines

Authors: Pamela Uribe, Lena Larsson, Anna Westerlund, Maria Ransjö

Published in: Odontology | Issue 4/2018

Abstract

Animal studies suggest that the dental follicle (DF) plays a major role in tooth eruption. However, the role of the DF during tooth impaction and related root resorptions in adjacent teeth is not clear. The hypothesis for the present study is that expression of regulatory factors involved in the bone remodelling process necessary for tooth eruption may differ between dental follicles from teeth with different clinical situations. We have analysed the gene expression profiles in the DF obtained from impacted canines, with (N = 3) or without (N = 5) signs of root resorption, and from control teeth (normal erupting teeth, mesiodens) (N = 3). DF from 11 patients (mean age: 13 years) obtains at the time of surgical exposure of the tooth. Due to the surgical time point, all teeth were in a late developmental stage. Gene expression related to osteoblast activation/bone formation, osteoclast recruitment and activation was analysed by RTqPCR. Genes related to bone formation (RUNX2, OSX, ALP, OCN, CX43) were highly expressed in all the samples, but osteoclast recruitment/activation markers (OPG, RANKL, MCP-1, CSF-1) were negligible. No apparent patterns or significant differences in gene expression were found between impacted canines, with or without signs of root resorption, or when compared to control teeth. Our results suggest the DF regulation of osteoclastic activity is limited in the late pre-emergent stage of tooth development, irrespective if the tooth is normally erupting or impacted. We suggest that the follicle may have an important regulatory function for alveolar bone formation in the final eruption process and CX43-gap junction communication could be an important signalling pathway.

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Title: Gene expression profiles in dental follicles from patients with impacted canines
Authors: Pamela Uribe
Lena Larsson
Anna Westerlund
Maria Ransjö
Publication date: 01-10-2018
Publisher: Springer Japan
Published in: Odontology / Issue 4/2018
Print ISSN: 1618-1247
Electronic ISSN: 1618-1255
DOI: https://doi.org/10.1007/s10266-018-0342-9

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Gene expression profiles in dental follicles from patients with impacted canines

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