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Transcriptome analysis of ankylosed primary molars with infraocclusion.

ABSTRACT: Primary molar ankylosis with infraocclusion can retard dental arch development and cause dental asymmetry. Despite its widespread prevalence, little is known about its molecular etiology and pathogenesis. To address this, RNA sequencing was used to generate transcriptomes of furcal bone from infraoccluded (n = 7) and non-infraoccluded (n = 9) primary second molars, all without succeeding biscuspids. Of the 18 529 expressed genes, 432 (2.3%) genes were differentially expressed between the two groups (false discovery rate < 0.05). Hierarchical clustering and principal component analysis showed clear separation in gene expression between infraoccluded and non-infraoccluded samples. Pathway analyses indicated that molar ankylosis is associated with the expression of genes consistent with the cellular inflammatory response and epithelial cell turnover. Independent validation using six expressed genes by immunohistochemical analysis demonstrated that the corresponding proteins are strongly expressed in the developing molar tooth germ, in particular the dental follicle and inner enamel epithelium. The descendants of these structures include the periodontal ligament, cementum, bone and epithelial rests of Malassez; tissues that are central to the ankylotic process. We therefore propose that ankylosis involves an increased inflammatory response associated with disruptions to the developmental remnants of the dental follicle and epithelial rests of Malassez.

SUBMITTER: Tong A

PROVIDER: S-EPMC7033215 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Transcriptome analysis of ankylosed primary molars with infraocclusion.

Tong Annie A Chow Yuh-Lit YL Xu Katie K Hardiman Rita R Schneider Paul P Tan Seong-Seng SS

International journal of oral science 20200221 1

Primary molar ankylosis with infraocclusion can retard dental arch development and cause dental asymmetry. Despite its widespread prevalence, little is known about its molecular etiology and pathogenesis. To address this, RNA sequencing was used to generate transcriptomes of furcal bone from infraoccluded (n = 7) and non-infraoccluded (n = 9) primary second molars, all without succeeding biscuspids. Of the 18 529 expressed genes, 432 (2.3%) genes were differentially expressed between the two gro ...[more]

PMID: 32080164

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Dataset Information

Transcriptome analysis of ankylosed primary molars with infraocclusion.

Publications

Transcriptome analysis of ankylosed primary molars with infraocclusion.

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