Analysis of the cells isolated from epithelial cell rests of Malassez through single-cell limiting dilution.

Abstract

The epithelial cell rests of Malassez (ERM) are essential in preventing ankylosis between the alveolar bone and the tooth (dentoalveolar ankylosis). Despite extensive research, the mechanism by which ERM cells suppress ankylosis remains uncertain; perhaps its varied population is to reason. Therefore, in this study, eighteen unique clones of ERM (CRUDE) were isolated using the single-cell limiting dilution and designated as ERM 1-18. qRT-PCR, ELISA, and western blot analyses revealed that ERM-2 and -3 had the highest and lowest amelogenin expression, respectively. Mineralization of human periodontal ligament fibroblasts (HPDLF) was reduced in vitro co-culture with CRUDE ERM, ERM-2, and -3 cells, but recovered when an anti-amelogenin antibody was introduced. Transplanted rat molars grown in ERM-2 cell supernatants produced substantially less bone than those cultured in other cell supernatants; inhibition was rescued when an anti-amelogenin antibody was added to the supernatants. Anti-Osterix antibody staining was used to confirm the development of new bones. In addition, next-generation sequencing (NGS) data were analysed to discover genes related to the distinct roles of CRUDE ERM, ERM-2, and ERM-3. According to this study, amelogenin produced by ERM cells helps to prevent dentoalveolar ankylosis and maintain periodontal ligament (PDL) space, depending on their clonal diversity.

• Authors: Syed Taufiqul Islam, Yoshihito Kurashige, Erika Minowa, Koki Yoshida, Durga Paudel, Osamu Uehara, Yunosuke Okada, Dembereldorj Bolortsetseg, Sayaka Sakakibara, Yoshihiro Abiko, Masato Saitoh
• Journal: Scientific reports (Sci Rep) Vol. 12 Issue 1 Pg. 382 (01 10 2022) ISSN: 2045-2322 [Electronic] England
• PMID: 35013397 (Publication Type: Journal Article)
• Copyright: © 2022. The Author(s).

Chemical References

• Amelogenin

Topics

• Amelogenin (genetics, metabolism)
• Animals
• Cell Proliferation
• Cell Separation
• Cells, Cultured
• Coculture Techniques
• Disease Models, Animal
• Epithelial Cells (metabolism, pathology)
• Fibroblasts (metabolism, pathology)
• Gene Expression Regulation
• Humans
• Male
• Molar (metabolism, pathology, transplantation)
• Osteogenesis
• Periodontal Ligament (metabolism, pathology)
• Phenotype
• Rats, Wistar
• Sus scrofa
• Tooth Ankylosis (genetics, metabolism, pathology, prevention & control)