1
|
Bud E, Vlasa A, Pacurar M, Matei A, Bud A, Szoke AR, Minervini G. A Retrospective Histological Study on Palatal and Gingival Mucosa Changes during a Rapid Palatal Expansion Procedure. Biomedicines 2023; 11:3246. [PMID: 38137467 PMCID: PMC10740776 DOI: 10.3390/biomedicines11123246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/03/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
The most common inflammatory reactions in the oral mucosa are found at the gingival level. The treatment of these inflammations requires, first of all, the removal of the causative factor; often, this maneuver is sufficient. The aim of this retrospective study was to evaluate clinical and histopathological changes that occur in terms of gingival and palatal mucosa enlargement during palatal expansion treatment and their evolution during treatment. Twenty-five (n = 25) research participants, aged between thirteen and twenty-six years old, were examined in this retrospective study. At the end of the treatment, fragments of tissue from the affected level were obtained via incisional biopsy and sent to the histopathology laboratory for a specialized examination. The changes identified were specific to mechanical traumatic injuries, thus excluding hyperplasia from other etiologies (infectious, tumoral, or non-mechanical traumatic). The examined fragments showed hyperplasia. The histopathological examination revealed the mechanical character of the lesion, strengthening the causal relationship between the insertion of the expander and the occurrence of hyperplasia of the palatal mucosa. The type of palatal expander influenced the degree of inflammation, with the severity of hyperplasia being more pronounced in the case of mini-implant-anchored rapid palatal expander (MARPE) usage than in the case of tooth-borne rapid palatal expander (RPE) usage. The analysis of the distance between the expander and the palatal mucosa did not provide conclusive results; the incidence and severity of the reaction were variable in patients with the same distance between the expander and the palatal or gingival mucosa.
Collapse
Affiliation(s)
- Eugen Bud
- Department of Orthodontics and Dental-Facial Orthopedics, Faculty of Dental Medicine, George Emil Palade University of Medicine and Pharmacy, Science and Technology, 540139 Târgu-Mureș, Romania; (E.B.); (M.P.)
| | - Alexandru Vlasa
- Department of Periodontology and Oral-Dental Diagnosis, Faculty of Dental Medicine, George Emil Palade University of Medicine and Pharmacy, Science and Technology, 540139 Târgu-Mureș, Romania
| | - Mariana Pacurar
- Department of Orthodontics and Dental-Facial Orthopedics, Faculty of Dental Medicine, George Emil Palade University of Medicine and Pharmacy, Science and Technology, 540139 Târgu-Mureș, Romania; (E.B.); (M.P.)
| | - Adrian Matei
- Independent Researcher, 540139 Târgu-Mureș, Romania
| | - Anamaria Bud
- Department of Pedodontics, Faculty of Dental Medicine, George Emil Palade University of Medicine and Pharmacy, Science and Technology, 540139 Târgu-Mureș, Romania
| | - Andreea-Raluca Szoke
- Department of Physiopathology, Faculty of General Medicine, George Emil Palade University of Medicine and Pharmacy, Science and Technology, 540139 Târgu-Mureș, Romania;
| | - Giuseppe Minervini
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania, Luigi Vanvitelli, 80138 Naples, Italy;
| |
Collapse
|
2
|
Nugraha AP, Ernawati DS, Narmada IB, Bramantoro T, Riawan W, Situmorang PC, Nam HY. RANK-RANKL-OPG expression after gingival mesenchymal stem cell hypoxia preconditioned application in an orthodontic tooth movement animal model. J Oral Biol Craniofac Res 2023; 13:781-790. [PMID: 38028229 PMCID: PMC10661597 DOI: 10.1016/j.jobcr.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/17/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
Background The expression of receptor activator of Nuclear Factor Kappa Beta (RANK) and its ligand (RANKL), as well as osteoprotegrin (OPG), in the alveolar bone (AB), may improve bone remodeling during orthodontic tooth movement (OTM). It is hypothesized that hypoxia-preconditioned gingival mesenchymal stem cells (GMSC) may be more effective than normoxia-preconditioned GMSC in this regard. This study aims to investigate the expression of RANK, RANKL, and OPG in the compression and tension sides of AB after allogeneic administration of GMSC that were normoxia or hypoxia-preconditioned in rabbits (Oryctolagus cuniculus) undergoing OTM. Methods Twenty-four healthy young male rabbits were divided into two groups: T1, which underwent OTM and received normoxia-preconditioned GMSC, and T2, which underwent OTM and received hypoxia-preconditioned GMSC. A ligature wire was attached to the mandibular first molar and connected to a 50 g/mm2 closed coil spring, exerting force on the central incisor and left mandibular molar of the experimental animals. After 24 h of OTM, either normoxia- or hypoxia-preconditioned GMSC were injected into the gingiva of the samples in a single dose of 20 μl of phosphate-buffered saline (PBS). All samples were sacrificed on days 7, 14, and 28, and immunohistochemistry was performed to analyze the expression of RANK, RANKL, and OPG on the tension and compression sides. Results The expressions of RANK-RANKL-OPG in the alveolar bone of the compression and tension sides were significantly different during the 14-day period of OTM following allogeneic administration of GMSC that were normoxia or hypoxia-preconditioned (p < 0.05). Conclusion The expression of RANK-RANKL was significantly increased on the compression side of the alveolar bone during OTM after the administration of hypoxia-preconditioned allogeneic GMSC but not on the tension side. Conversely, RANKL-OPG expression was enhanced on the tension side but not on the compression side, as observed through immunohistochemical analysis in vivo.
Collapse
Affiliation(s)
- Alexander Patera Nugraha
- Department of Orthodontics, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Diah Savitri Ernawati
- Department of Oral Medicine, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Ida Bagus Narmada
- Department of Orthodontics, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Taufan Bramantoro
- Department of Dental Public Health, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Wibi Riawan
- Department of Biomolecular Biochemistry, Faculty of Medicine, Universitas Brawijaya, Malang, Indonesia
| | - Putri Cahaya Situmorang
- Department of Biology, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan, Indonesia
| | - Hui Yin Nam
- Nanotechnology and Catalysis Research Center (NANOCAT), Universiti Malaya, Kuala Lumpur, Malaysia
- Tissue Engineering Group, Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
3
|
Yong J, Gröger S, von Bremen J, Meyle J, Ruf S. Immunorthodontics: PD-L1, a Novel Immunomodulator in Cementoblasts, Is Regulated by HIF-1α under Hypoxia. Cells 2022; 11:cells11152350. [PMID: 35954195 PMCID: PMC9367578 DOI: 10.3390/cells11152350] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/26/2022] [Accepted: 07/28/2022] [Indexed: 02/04/2023] Open
Abstract
Recent studies have revealed that hypoxia alters the PD-L1 expression in periodontal cells. HIF-1α is a key regulator for PD-L1. As hypoxia presents a hallmark of an orthodontically induced microenvironment, hypoxic stimulation of PD-L1 expression may play vital roles in immunorthodontics and orthodontically induced inflammatory root resorption (OIIRR). This study aims to investigate the hypoxic regulation of PD-L1 in cementoblasts, and its interaction with hypoxia-induced HIF-1α expression. The cementoblast (OCCM-30) cells (M. Somerman, NIH, NIDCR, Bethesda, Maryland) were cultured in the presence and absence of cobalt (II) chloride (CoCl2). Protein expression of PD-L1 and HIF-1α as well as their gene expression were evaluated by Western blotting and RT-qPCR. Immunofluorescence was applied to visualize the localization of the proteins within cells. The HIF-1α inhibitor (HY-111387, MedChemExpress) was added, and CRISPR/Cas9 plasmid targeting HIF-1α was transferred for further investigation by flow cytometry analysis. Under hypoxic conditions, cementoblasts undergo an up-regulation of PD-L1 expression at protein and mRNA levels. Silencing of HIF-1α using CRISPR/Cas9 indicated a major positive correlation with HIF-1α in regulating PD-L1 expression. Taken together, these findings show the influence of hypoxia on PD-L1 expression is modulated in a HIF-1α dependent manner. The HIF-1α/PD-L1 pathway may play a role in the immune response of cementoblasts. Thus, combined HIF-1α/PD-L1 inhibition could be of possible therapeutic relevance for OIIRR prevention.
Collapse
Affiliation(s)
- Jiawen Yong
- Department of Orthodontics, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany; (S.G.); (J.v.B.); (S.R.)
- Department of Periodontology, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany;
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310003, China
- Correspondence: or ; Tel.: +49-641-99-46131
| | - Sabine Gröger
- Department of Orthodontics, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany; (S.G.); (J.v.B.); (S.R.)
- Department of Periodontology, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany;
| | - Julia von Bremen
- Department of Orthodontics, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany; (S.G.); (J.v.B.); (S.R.)
| | - Joerg Meyle
- Department of Periodontology, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany;
| | - Sabine Ruf
- Department of Orthodontics, Faculty of Medicine, Justus Liebig University Giessen, 35392 Giessen, Germany; (S.G.); (J.v.B.); (S.R.)
| |
Collapse
|
4
|
Wang F, Rong P, Wang J, Yu X, Wang N, Wang S, Xue Z, Chen J, Meng W, Peng X. Anti-osteoporosis effects and regulatory mechanism of Lindera aggregata based on network pharmacology and experimental validation. Food Funct 2022; 13:6419-6432. [PMID: 35616518 DOI: 10.1039/d2fo00952h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Osteoporosis (OP) is characterized by the flaccidity of bones or bone bi-disease caused by kidney deficiency. Lindera aggregate has been used to strengthen kidney function in China for thousands of years. It has been approved by Chinese Pharmacopoeia that the root of Lindera aggregata (RLA) can replenish and tonify the kidney, which is thought to be an effective way to alleviate OP. In this study, a network pharmacology approach was applied to explore the active components and potential mechanisms of RLA in osteoporosis treatment. Then, the ethanolic extract of the root of L. aggregata (EERL) was prepared and these predicted results were validated by prednisone-induced zebrafish embryos model. Moreover, the candidate compounds were identified by UPLC-ESI-MS/MS. The anti-OP results showed that EERL could significantly reverse the bone loss of zebrafish induced by prednisone. The mRNA expressions results showed that EERL decreased osteoclast bone resorption by regulating the RANK/RANKL/OPG system. Also, it increased bone formation by regulating the gene expressions of spp1, mmp2, mmp9, runx2b, alp, and entpd5a. Our results demonstrated the reliability of the network pharmacology method, and also revealed the anti-OP effect and potential mechanism of RLA.
Collapse
Affiliation(s)
- Furong Wang
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Pengze Rong
- Ningbo University School of Medicine, Ningbo 315211, China
| | - Juan Wang
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Xiao Yu
- Department of Orthopedics, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo 315000, China
| | - Na Wang
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Shengyu Wang
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Zikai Xue
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Junnan Chen
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Wenlong Meng
- Zhejiang Pharmaceutical College, Ningbo 315100, Zhejiang Province, PR China
| | - Xin Peng
- Ningbo Municipal Hospital of TCM, Affiliated Hospital of Zhejiang Chinese Medical University, Ningbo 315010, Zhejiang Province, PR China.
| |
Collapse
|
5
|
Impact of Myeloid p38α/MAPK on Orthodontic Tooth Movement. J Clin Med 2022; 11:jcm11071796. [PMID: 35407404 PMCID: PMC9000068 DOI: 10.3390/jcm11071796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 02/01/2023] Open
Abstract
Objectives: Myeloid p38α/MAPK regulate and coordinate osteoclastogenesis. The present study was conducted to investigate the role of myeloid p38α/MAPK during orthodontic tooth movement. Methods: Orthodontic tooth movement was performed in wildtype and p38αΔmyel mice lacking p38α/MAPK expression in myeloid cells. First, bone parameter as well as osteoblast and osteoclast number were determined in tibiae. RNA was isolated from the untreated and orthodontically treated maxillary jaw side and expression of genes involved in inflammation and bone remodelling were analysed. Finally, periodontal bone loss, alveolar bone density and extent of orthodontic tooth movement were assessed. Results: Bone density was increased in p38αΔmyel mice compared to wildtype mice in tibiae (p = 0.043) and alveolar bone (p = 0.003). This was accompanied by a reduced osteoclast number in tibiae (p = 0.005) and TRAP5b in serum (p = 0.015). Accordingly, expression of osteoclast-specific genes was reduced in p38αΔmyel mice. Extent of tooth movement was reduced in p38αΔmyel mice (p = 0.024). This may be due to the higher bone density of the p38αΔmyel mice. Conclusions: Myeloid p38α/MAPK thus appears to play a regulatory role during orthodontic tooth movement by regulating osteoclastogenesis.
Collapse
|