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Ratanasereeprasert N, Hsu LF, Wang SK, Chen YJ, Chang JH, Yao CCJ. Molecular signaling and mechanisms of low-level laser-induced gene expression in cells involved in orthodontic tooth movement. J Formos Med Assoc 2024; 123:442-451. [PMID: 37805307 DOI: 10.1016/j.jfma.2023.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/03/2023] [Accepted: 09/19/2023] [Indexed: 10/09/2023] Open
Abstract
BACKGROUND The study aimed to observe molecular signaling, including reactive oxygen species (ROS) and mitochondrial membrane potential (ΔΨm), to evaluate the alteration of gene expression by low-level laser therapy (LLLT) and the correlation between its mechanisms and the NF-kB pathway in cells involved in orthodontic tooth movement. METHODS Osteoblast-like cells (MG63), immortalized periodontal ligament cells (iPDL), and M1 macrophage-like cells were irradiated by 980-nm LLLT with energy densities of 1 and 10 J/cm2 ΔΨm and intracellular ROS were monitored using fluorescent probes. The changes of mRNA expression were assessed using reverse transcription polymerase chain reaction (RT-PCR). NF-kB inhibitor, ROS scavenger, and ΔΨm suppressor were used to analyze signals associated with the regulation of gene expression. Finally, Western blot analysis was performed to confirm NF-kB signaling after LLLT. RESULTS We found the increases of ΔΨm and ROS in all three cell types after LLLT, but no significant difference was observed between 1 and 10 J/cm2 LLLT. Regarding gene expression, some target genes were upregulated in MG63 6 h, 12 h, and 1 day after LLLT and in iPDL cells 12 h and 1 day after LLLT. However, no changes occurred in M1 cells. The inhibitor that significantly reduced most changes in gene expression was NF-kB inhibitor. Western blot analysis showed the increase in p-IkBα level after LLLT in iPDL and MG63, but not in M1. CONCLUSION The 980-nm LLLT increased ΔΨm and ROS production in all three cell types. However, changes in gene regulation were found only in MG63 and iPDL cells, which related to the NF-kB pathway.
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Affiliation(s)
| | - Li-Fang Hsu
- Department of Dentistry, National Taiwan University Hospital, Hsin-Chu Branch, Hsin-Chu, Taiwan
| | - Shih-Kai Wang
- Department of Dentistry, School of Dentistry, National Taiwan University, Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei, Taiwan
| | - Yi-Jane Chen
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan; Division of Orthodontics and Dentofacial Orthopedics, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
| | - Jui-Heng Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chung-Chen Jane Yao
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan; Division of Orthodontics and Dentofacial Orthopedics, Dental Department, National Taiwan University Hospital, Taipei, Taiwan.
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Hsu LF, Ratanasereeprasert N, Wang SK, Chen JT, Chen YJ, Yeh TH, Sung HH, Yao CCJ. Craniofacial and olfactory sensory changes after long-term unilateral nasal obstruction-an animal study using MMP-3-LUC transgenic rats. Sci Rep 2024; 14:2616. [PMID: 38297007 PMCID: PMC10830476 DOI: 10.1038/s41598-024-51544-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/06/2024] [Indexed: 02/02/2024] Open
Abstract
Nasal obstruction exerts considerable physiological effects on the respiratory system and craniofacial morphology during the developmental stage. This study used MMP-3-LUC transgenic rats for in vivo tracking of long-term expression in the rat nasal region after unilateral nasal obstruction. Skeletal changes of the craniofacial, nasal, and sinus regions were measured through micro-computed tomography examination and analysis with 3D image processing and calculation. Matrix metalloproteinase-3 and olfactory marker protein expression were also investigated through immunohistochemistry (IHC). Unilateral nasal obstruction significantly reduced the MMP-3 signal in the nasal region of MMP-3-LUC transgenic rats, which was mainly expressed in the respiratory epithelium. Long-term obstruction also caused morphological changes of the craniofacial hard tissue, such as nasal septal deviation, longer inter-jaw distance, and increased maxillary molar dental height. It also caused compensatory growth in olfactory nerve bundles and the olfactory epithelium, as confirmed by IHC. In our study, long-term unilateral nasal obstruction caused nasal septal deviation toward the unobstructed side, hyper divergent facial development including longer molar dental height, and reduced MMP-3 production. However, further investigation is necessary to explore the mechanism in depth.
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Affiliation(s)
- Li-Fang Hsu
- Department of Dentistry, National Taiwan University Hospital, Hsin-Chu Branch, Hsin-Chu, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No. 1, Chang-Te Street, Taipei, 10048, Taiwan
| | - Nutthakarn Ratanasereeprasert
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No. 1, Chang-Te Street, Taipei, 10048, Taiwan
| | - Shih-Kai Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei, Taiwan
| | - Jung-Tsu Chen
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No. 1, Chang-Te Street, Taipei, 10048, Taiwan
| | - Yi-Jane Chen
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei, Taiwan
- Division of Orthodontics and Dentofacial Orthopedics, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
| | - Te-Huei Yeh
- Department of Otolaryngology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Hsiang-Hsuan Sung
- National Laboratory Animal Center, National Applied Research Laboratories, Taipei, Taiwan
| | - Chung-Chen Jane Yao
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No. 1, Chang-Te Street, Taipei, 10048, Taiwan.
- Division of Orthodontics and Dentofacial Orthopedics, Dental Department, National Taiwan University Hospital, Taipei, Taiwan.
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Ratanasereeprasert N, Hsu LF, Wang SK, Jane Yao CC. Orthodontically induced changes to the genetic profile in periodontal ligament tissue and cytokine release in gingival crevicular fluid - A pilot investigation. J Dent Sci 2024; 19:387-396. [PMID: 38303827 PMCID: PMC10829649 DOI: 10.1016/j.jds.2023.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 07/31/2023] [Indexed: 02/03/2024] Open
Abstract
Background/purpose It has been known that genetic factors influence orthodontic tooth movement, however, scientific research on humans is lacking. Therefore, this study aimed to investigate dynamic changes to the genetic profile in human periodontal ligament (PDL) tissue and cytokine release in gingival crevicular fluid (GCF) during the first 28 days of orthodontic treatment. Materials and methods Fifteen teeth from three patients were recruited. Full-mouth fixed appliances with extraction of four premolars and one maxillary third molar was planned for orthodontic treatment. GCF collection and tooth extraction were performed following force application for 0, 1, 3, 7, and 28 days. GCF was analyzed using multiplex immunoassay for 27 cytokines. PDL tissue was collected after extraction and submitted for RNA exome-sequencing using Illumina sequencing platform. Further analysis of differentially expressed genes (DEGs), gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways, and heatmaps were conducted. Results GCF cytokine levels varied among three patients; some patients exhibited a peak cytokine level on Day 0 whereas others did so on Days 1-3. In RNA exome sequencing data, GO and KEGG analyses showed that genes associated with sensory receptors were upregulated on Day 1, genes involved in bone remodeling were upregulated on Days 3 and 28, and genes related to osteoclast differentiation were upregulated on Day 7. Conclusion RNA sequencing data demonstrate that the specific types of genes are expressed at different time points, whereas the data on cytokine changes show a large variation in concentration levels and dynamic change patterns among the patients.
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Affiliation(s)
| | - Li-Fang Hsu
- Department of Dentistry, National Taiwan University Hospital, Hsin-Chu Branch, Hsin-Chu, Taiwan
| | - Shih-Kai Wang
- Department of Dentistry, School of Dentistry, National Taiwan University, Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei, Taiwan
| | - Chung-Chen Jane Yao
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
- Division of Orthodontics and Dentofacial Orthopedics, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
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Ratanasereeprasert N, Weng CY, Yang SYH, Chen YJ, Yao CCJ. Molar space closure: To do or not to do? APOS 2021. [DOI: 10.25259/apos_112_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Missing or compromised permanent molars can complicate orthodontic treatment planning and mechanics. Molar extraction should be considered in appropriate situations, but clinicians must decide between closing and regaining the edentulous space. Several factors should be taken into consideration to achieve appropriate molar space management, such as the need for space, asymmetry, periodontal status, sinus pneumatization, and the terminal molar position. Herein, three sample cases are reported to demonstrate the treatment options for molar space closure and maintenance with these factors taken into consideration during treatment planning. The understanding of mechanics played a crucial role in anchorage preparation and side effect prevention. If the third molar substitution was managed in advance and adequate space between the ramus and third molar was obtained via second molar protraction, the tooth spontaneously erupted in a favorable position without requiring further treatment. This case series can aid clinicians in molar space management. Regardless of whether the space is to be closed or regained, the treatment plan should conform to the patient’s expectations and improve occlusion with minimal side effects and treatment duration.
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Affiliation(s)
- Nutthakarn Ratanasereeprasert
- Department of Orthodontics and Dentofacial Orthopedics, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan,
| | - Chu-Yin Weng
- Department of Orthodontics and Dentofacial Orthopedics, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan,
| | - Stella Ya-Hui Yang
- Department of Orthodontics and Dentofacial Orthopedics, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan,
| | - Yi-Jane Chen
- Department of Orthodontics and Dentofacial Orthopedics, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan,
| | - Chung-Chen Jane Yao
- Department of Orthodontics and Dentofacial Orthopedics, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan,
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