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Effects of antibacterial mouth rinses on multiple oral biofilms model

구강세정제가 다중 구강 바이오필름 모델에 미치는 영향

  • Received : 2023.06.07
  • Accepted : 2023.07.19
  • Published : 2023.08.30

Abstract

Objectives: To confirm the antibacterial effects of each mouth rinse on multiple oral biofilms in vitro. Methods: The antibacterial effects of different mouth rinses were examined by ATP and counted colony forming units (CFU). Preformed oral biofilms on saliva coated hydroxyapatite (sHA) disks were treated with essential oil and saline; then, the multiple oral biofilms were observed by Scanning electron microscope (SEM). RNA sequencing analysis was performed on total RNA isolated from old biofilms of P. intermedia ATCC 49046. Results: In the CFU measured result compared to controls, preformed multiple oral biofilms were reduced from a low of 39.0% to 95.7% (p<0.05). The size of bacterial cells changed after treatment with the essential oil, and some of the cells ruptured into small pieces of cell debris. Gene expression in P. intermedia ATCC 49046 significantly altered in RNA transcribed and protein translated genes after exposure to essential oil. Conclusions: Mouth rinse solutions with different ingredients had different antibacterial effects and may alter surface structure and gene expression as determined by RNA sequencing.

연구목적: 실험실내에서 성분이 다른 구강세정제가 오래 형성된 다중 구강 바이오필름에 미치는 항균효과를 확인하였다. 연구방법: 구강세정제의 항균효과를 ATP, CFU로 확인하였고, 다중 구강 바이오필름을 형성시킨 sHA 디스크를 구강세정제로 처리한 후 SEM을 이용하여 형태학적 모양을 관찰하였다. 총RNA는 P. intermedia의 바이오필름에서 추출하였고 RNA sequencing 분석을 하였다. 연구결과: 대조군과 구강세정제 4개를 비교한 CFU 측정 결과에서 오래 형성된 다중 구강 바이오필름은 39.0%로부터 95.7%까지 감소한 것으로 나타났다(p<0.05). 에센셜 오일 처리 후 구강생물막 세포들은 크기가 변하고 일부 파열되고 작은 세포 파편 조각도 나타났다. 에센셜 오일로 처리 후 P. intermedia 유전자 발현은 RNA 전사와 단백질 번역 관련 유전자에서 유의한 변화를 보였다. 결론: 성분이 다른 구강세정제는 항균효과를 가지며 표면 구조 및 유전자 발현에 영향을 미친다.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.2021R1C1C1010005).

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