Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Characterization of Odontoblasts in Supernumerary Tooth-derived Dental Pulp Stem Cells between Passages by Real-Time PCR

과잉치 치수유래 줄기세포의 Real-time PCR에 의한 계대간 상아질모세포 발현 특성

  • Ji, Sangeun (Cheonan Ebargae Orthodontic Clinic) ;
  • Song, Sol (Department of Pediatric Dentistry, College of Dentistry, Dankook University) ;
  • Lee, Joonhaeng (Department of Pediatric Dentistry, College of Dentistry, Dankook University) ;
  • Kim, Jongbin (Department of Pediatric Dentistry, College of Dentistry, Dankook University) ;
  • Kim, Jongsoo (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
  • 지상은 (천안 이바르게 치과교정과) ;
  • 송솔 (단국대학교 치과대학 소아치과학교실) ;
  • 이준행 (단국대학교 치과대학 소아치과학교실) ;
  • 김종빈 (단국대학교 치과대학 소아치과학교실) ;
  • 김종수 (단국대학교 치과대학 소아치과학교실)
  • Received : 2021.03.12
  • Accepted : 2021.03.22
  • Published : 2021.08.31
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Abstract

The aim of this study is to compare the properties of odontoblast gene of early passage cells and late passage cells derived from impacted maxillary supernumerary teeth. Impacted supernumerary teeth with maxilla were extracted from 12 patients (8 males, 4 females) between 6 - 9 years old without medical history. Real-time polymerase chain reaction (PCR) was conducted to compare characterization of odontoblast cell in the 3rd and 10th passage, and between with bone inducing additive group and without additive group. Genes for odontoblasts characteristics are osteonectin (ONT), alkaline phosphatase (ALP), osteocalcin (OCN), dentin matrix protein 1 (DMP-1) and dentin sialophosphoprotein (DSPP). The level of gene expression was in a decreasing order of ONT, ALP, OCN, DMP-1 and DSPP in the 3rd passage, and in decreasing order of ONT, DMP-1, OCN, ALP, and DSPP in the 10th passage in the undifferentiation and differentiation group. The order of ONT, DMP-1, and OCN did not changed. ALP and DMP-1 were switched in order. ALP and DMP-1 may be used as important markers for differentiating between the 3rd passage and 10th passage cells. Considering that supernumerary tooth was extracted young age and the time required to cultured 10th passage was short, supernumerary tooth can be considered a useful donor site of dental pulp stem cells.

이 연구의 목적은 발거 된 매복 상악 과잉치에서 얻은 치수유래 줄기세포의 초기 계대와 후기 계대의 상아질모세포 유전자의 특성을 알아보는 것이다. 전신 의과 병력이 없는 6 - 9세 사이의 남녀아이 12명에게서 서면동의를 얻고 모두 상악에 위치한 과잉치를 발거하여 당일 발거된 과잉치의 치수세포를 채취하였다. 12개의 세포를 각각 3계대와 10계대에서 골형성 유도 분화제를 처리한 군과 처리하지 않은 군을 나누어 실시간 중합효소 연쇄반응을 시행하여 상아질모세포의 특성을 알아보았다. 사용된 유전자는 osteonectin (ONT), alkaline phosphatase (ALP), osteocalcin (OCN), dentin matrix protein 1 (DMP-1), 그리고 dentin sialophosphoprotein (DSPP)였다. 유전자 발현양은, 분화제를 처리하지 않은 군 3계대에서는 ONT, ALP, OCN, DMP-1, DSPP순서로 많이 발현하였다. 분화제를 처리하지 않은 군 10계대에서는 ONT, DMP-1, OCN, ALP, DSPP순으로 ONT, OCN, DSPP의 순서에는 변화가 없지만 ALP, DMP-1의 순서는 서로 바뀌었다. 이상의 결과를 종합해 볼 때, ALP와 DMP-1은 3계대와 10계대 세포의 분화를 위한 중요한 표지자로 사용될 수 있다. 과잉치 치수유래 줄기세포는 상아질모세포의 특성을 가지며, 또한 과잉치가 어린 나이에 발거되고 10계대까지 소요되는 시간이 적게 걸린다는 것을 고려하면, 과잉치는 치아 유래 줄기세포의 공여부로서 훌륭한 활용가능성이 있음을 확인하였다.

Keywords

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