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Alnazeh AA, Kamran MA, Aseeri Y, Alrwuili MR, Aljabab MA, Baig EA, Hameed MS. Levels of Inflammatory and Bone Metabolic Markers in the Gingival Crevicular Fluid of Individuals Undergoing Fixed Orthodontic Treatment in Comparison to Those Utilizing Invisalign. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:2107. [PMID: 38138210 PMCID: PMC10744492 DOI: 10.3390/medicina59122107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/18/2023] [Accepted: 11/26/2023] [Indexed: 12/24/2023]
Abstract
Background and Objectives: Evaluation of the levels of cytokine and bone metabolic biomarkers (BMBs) in patients receiving fixed orthodontic therapy (FOT) and Invisalign. Materials and Methods: Sixty participants were enrolled after meeting the predefined inclusion criteria. Patients then underwent either FOT or Invisalign by allocating them randomly to each group (n = 30). The basic periodontal assessment was performed, including the plaque index (PI), gingival index (GI), and bleeding on probing (BoP), at baseline and again after 4 weeks. Gingival crevicular fluid (GCF) samples were taken from each individual at baseline and after 4 weeks. An enzyme-linked immunosorbent assay (ELISA) technique was used to determine the cytokine and BMB levels. An unpaired t-test compared the FOT and Invisalign group's means and SDs. Paired t-tests examined the difference between T0 baseline and T1. Results: Patients treated with either FOT or Invisalign presented no statistically significant difference in terms of periodontal parameters such as PI, GI, and BoP (p > 0.05). The levels of IL-6 were significantly higher in patients treated with FOT as compared to Invisalign at T1 (p < 0.05) The other tested cytokines, IL-10, 13, 17, and GM-CSF, were not significantly different in either the FOT or Invisalign group at baseline and 4 weeks follow-up (p > 0.05). Regarding BMBs, it was detected that NTx and OC levels in both of the investigated groups were not significantly different at baseline and after 4 weeks (p > 0.05). However, NTx levels rose significantly (p < 0.05) and OC levels fell from T0 to T1. Conclusions: FOT and Invisalign displayed comparable outcomes in terms of cytokine and BMB levels. However, only IL-6 and NTx were significantly different at week 4 from baseline.
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Affiliation(s)
- Abdullah A. Alnazeh
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - Muhammad Abdullah Kamran
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - Yahya Aseeri
- Specialist in Restorative Dentistry (AEGD), Ministry of Health, Abha 7588, Saudi Arabia
| | - Mohammad Raji Alrwuili
- Orthodontic Department, Qurayyat Specialized Dental Center, Al-Qurayyat 77453, Saudi Arabia
| | - Mohammed Ahmed Aljabab
- Orthodontic Department, Qurayyat Specialized Dental Center, Al-Qurayyat 77453, Saudi Arabia
| | - Eisha Abrar Baig
- Dow International Dental College, Dow University of Health Science, Karachi 74200, Pakistan
| | - Mohammad Shahul Hameed
- Department of Diagnostic Sciences and Oral Biology, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
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Oruba Z, Gibas-Stanek M, Pihut M, Cześnikiewicz-Guzik M, Stós W. Orthodontic treatment in patients with periodontitis - a narrative literature review. Aust Dent J 2023; 68:238-246. [PMID: 37688346 DOI: 10.1111/adj.12974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2023] [Indexed: 09/10/2023]
Abstract
Patients with periodontitis often require an inter-disciplinary approach, including orthodontic treatment, for effective rehabilitation of masticatory function, aesthetics and quality of life. The aim of this narrative review was to comprehensively discuss literature focusing on the biology, indications and inter-disciplinary connections related to the orthodontic approach in patients with periodontitis and to present clinical concepts in accordance with valid guidelines. The outcomes of the experimental studies indicate that orthodontic tooth movement (OTM) can be performed safely for teeth with reduced periodontium, provided infection and inflammation are controlled. Orthodontic treatment can correct pathological tooth migration, is not associated with deterioration of clinical periodontal parameters and improves aesthetics. Intrusion is safe when performed with light forces and under a strict oral hygiene regimen. Teeth can be moved either towards or away from the intrabony defect previously subjected to regenerative procedures, and research suggests that OTM has the potential to enhance bone formation after regenerative therapy. The data on orthodontic movement of teeth with furcation involvement are very scarce. The improvement in furcation involvement following either combined periodontal and orthodontic treatment was only documented in animal model studies. Due to bone and tooth loss, special consideration should be given to orthodontic treatment mechanics. © 2023 Australian Dental Association.
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Affiliation(s)
- Z Oruba
- Faculty of Medicine, Department of Periodontology, Preventive Dentistry and Oral Pathology, Institute of Dentistry, Jagiellonian University Medical College, Kraków, Poland
| | - M Gibas-Stanek
- Faculty of Medicine, Institute of Dentistry, Jagiellonian University Medical College, Chair of Prosthodontics and Orthodontics, Kraków, Poland
| | - M Pihut
- Faculty of Medicine, Institute of Dentistry, Jagiellonian University Medical College, Chair of Prosthodontics and Orthodontics, Kraków, Poland
| | - M Cześnikiewicz-Guzik
- Faculty of Medicine, Department of Periodontology, Preventive Dentistry and Oral Pathology, Institute of Dentistry, Jagiellonian University Medical College, Kraków, Poland
| | - W Stós
- Faculty of Medicine, Institute of Dentistry, Jagiellonian University Medical College, Chair of Prosthodontics and Orthodontics, Kraków, Poland
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3
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Gujar AN, Shivamurthy PG. Effect of 125 Hz and 150 Hz vibrational frequency electric toothbrushes on the rate of orthodontic tooth movement and prostaglandin E2 levels. Korean J Orthod 2023; 53:307-316. [PMID: 37746776 PMCID: PMC10547591 DOI: 10.4041/kjod23.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/03/2023] [Accepted: 08/13/2023] [Indexed: 09/26/2023] Open
Abstract
Objective To evaluate the effects of an electric toothbrush with vibrational frequencies of 125 Hz and 150 Hz on the orthodontic tooth movement (OTM) rate and the production of prostaglandin E2 (PGE2). Methods Out of thirty patients (aged 18-25 years; 16 females and 14 males), ten patients each formed Group A and B, who used electric toothbrushes with 125 Hz and 150 Hz vibrations, respectively. The remaining ten patients (Group C) served as the control group and did not use electric toothbrushes. The rate of OTM and levels of PGE2 using microcapillary pipettes were calculated before the start of retraction (T0), on the 30th day (T1), on the 60th day (T2), and on the 90th day (T3) from the start of retraction in all the groups. Results There was a statistically significant difference in the mean OTM values and PGE2 levels in all three groups at different time intervals, with the maximum difference seen in Group B compared to Group A and least in Group C at T1, T2 and T3. Conclusions The rate of OTM and levels of PGE2 were highest in patients who used an electric toothbrush with 150 Hz mechanical vibration compared to those who used an electric toothbrush with 125 Hz mechanical vibration and least in patients who did not use an electric toothbrush. Mechanical vibration led to an increase in the PGE2 levels and accelerated the OTM.
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Affiliation(s)
- Anadha N. Gujar
- Department of Orthodontics, Sri Rajiv Gandhi College of Dental Sciences and Hospital, Bangalore, India
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Navarrete C, Riquelme A, Baksai N, Pérez R, González C, Michea M, von Mühlenbrock H, Cafferata EA, Vernal R. Levels of Pro-Inflammatory and Bone-Resorptive Mediators in Periodontally Compromised Patients under Orthodontic Treatment Involving Intermittent Forces of Low Intensities. Int J Mol Sci 2023; 24:ijms24054807. [PMID: 36902236 PMCID: PMC10002573 DOI: 10.3390/ijms24054807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023] Open
Abstract
During orthodontic treatment, diverse cytokines, enzymes, and osteolytic mediators produced within the teeth surrounding periodontal tissues determine the rate of alveolar bone remodeling and consequent teeth movement. In patients with teeth presenting reduced periodontal support, periodontal stability should be ensured during orthodontic treatment. Thus, therapies based on the application of low-intensity intermittent orthodontic forces are recommended. To determine if this kind of treatment is periodontally well tolerated, this study aimed to analyze the production of receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), interleukin (IL)-6, IL-17A, and matrix metalloproteinase (MMP)-8 in periodontal tissues of protruded anterior teeth with reduced periodontal support and undergoing orthodontic treatment. Patients with periodontitis-associated anterior teeth migration received non-surgical periodontal therapy and a specific orthodontic treatment involving controlled low-intensity intermittent orthodontic forces. Samples were collected before periodontitis treatment, after periodontitis treatment, and at 1 week to 24 months of the orthodontic treatment. During the 2 years of orthodontic treatment, no significant differences were detected in the probing depth, clinical attachment level, supragingival bacterial plaque, and bleeding on probing. In line with this, the gingival crevicular levels of RANKL, OPG, IL-6, IL-17A, and MMP-8 did not vary between the different evaluation time-points of the orthodontic treatment. When compared with the levels detected during the periodontitis, the RANKL/OPG ratio was significantly lower at all the analyzed time-points of the orthodontic treatment. In conclusion, the patient-specific orthodontic treatment based on intermittent orthodontic forces of low intensities was well tolerated by periodontally compromised teeth with pathological migration.
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Affiliation(s)
- Cristian Navarrete
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Alejandro Riquelme
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Natalia Baksai
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Romina Pérez
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Claudia González
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - María Michea
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Hans von Mühlenbrock
- Orthodontics-Periodontics Center, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Emilio A. Cafferata
- Department of Periodontology, School of Dentistry, Universidad Científica del Sur, Lima 15067, Peru
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
| | - Rolando Vernal
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
- Department of Conservative Dentistry, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile
- Correspondence:
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Lin B, Ser HL, Wang L, Li J, Chan KG, Lee LH, Tan LTH. The Emerging Role of MMP12 in the Oral Environment. Int J Mol Sci 2023; 24:ijms24054648. [PMID: 36902078 PMCID: PMC10002488 DOI: 10.3390/ijms24054648] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 03/06/2023] Open
Abstract
Matrix metalloproteinase-12 (MMP12), or macrophage metalloelastase, plays important roles in extracellular matrix (ECM) component degradation. Recent reports show MMP12 has been implicated in the pathogenesis of periodontal diseases. To date, this review represents the latest comprehensive overview of MMP12 in various oral diseases, such as periodontitis, temporomandibular joint dysfunction (TMD), orthodontic tooth movement (OTM), and oral squamous cell carcinoma (OSCC). Furthermore, the current knowledge regarding the distribution of MMP12 in different tissues is also illustrated in this review. Studies have implicated the association of MMP12 expression with the pathogenesis of several representative oral diseases, including periodontitis, TMD, OSCC, OTM, and bone remodelling. Although there may be a potential role of MMP12 in oral diseases, the exact pathophysiological role of MMP12 remains to be elucidated. Understanding the cellular and molecular biology of MMP12 is essential, as MMP12 could be a potential target for developing therapeutic strategies targeting inflammatory and immunologically related oral diseases.
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Affiliation(s)
- Bingpeng Lin
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Department of Orthodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou 510180, China
- Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou 510182, China
| | - Hooi Leng Ser
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Bandar Sunway 47500, Malaysia
| | - Lijing Wang
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Vascular Biology Research Institute, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Jiang Li
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Department of Orthodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou 510180, China
- Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou 510182, China
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
- International Genome Centre, Jiangsu University, Zhenjiang 212013, China
- Correspondence: (K.-G.C.); (L.-H.L.)
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Innovative Bioprospection Development Research Group (InBioD), Clinical School Johor Bahru, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Johor Bahru 80100, Malaysia
- Correspondence: (K.-G.C.); (L.-H.L.)
| | - Loh Teng-Hern Tan
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Innovative Bioprospection Development Research Group (InBioD), Clinical School Johor Bahru, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Johor Bahru 80100, Malaysia
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Papageorgiou SN, Antonoglou GN, Michelogiannakis D, Kakali L, Eliades T, Madianos P. Effect of periodontal-orthodontic treatment of teeth with pathological tooth flaring, drifting, and elongation in patients with severe periodontitis: A systematic review with meta-analysis. J Clin Periodontol 2021; 49 Suppl 24:102-120. [PMID: 34327710 PMCID: PMC9290963 DOI: 10.1111/jcpe.13529] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 07/25/2021] [Indexed: 12/28/2022]
Abstract
Aim To assess the beneficial and adverse effects on the dental and periodontal issues of periodontal–orthodontic treatment of teeth with pathological tooth flaring, drifting, and elongation in patients with severe periodontitis. Materials and methods Nine databases were searched in April 2020 for randomized/non‐randomized clinical studies. After duplicate study selection, data extraction, and risk‐of‐bias assessment, random‐effect meta‐analyses of mean differences (MDs) and their 95% confidence intervals (CIs) were performed, followed by subgroup/meta‐regression analyses. Results A total of 30 randomized and non‐randomized clinical studies including 914 patients (29.7% male; mean age 43.4 years) were identified. Orthodontic treatment of pathologically migrated teeth was associated with clinical attachment gain (−0.24 mm; seven studies), pocket probing depth reduction (−0.23 mm; seven studies), marginal bone gain (−0.36 mm; seven studies), and papilla height gain (−1.42 mm; two studies) without considerable adverse effects, while patient sex, gingival phenotype, baseline disease severity, interval between periodontal and orthodontic treatment, and orthodontic treatment duration affected the results. Greater marginal bone level gains were seen by additional circumferential fiberotomy (two studies; MD = –0.98 mm; 95% CI = –1.87 to −0.10 mm; p = .03), but the quality of evidence was low. Conclusions Limited evidence of poor quality indicates that orthodontic treatment might be associated with small improvements of periodontal parameters, which do not seem to affect prognosis, but more research is needed.
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Affiliation(s)
- Spyridon N Papageorgiou
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Georgios N Antonoglou
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, Department of Periodontology, Faculty of Dentistry, University Complutense, Madrid, Spain
| | - Dimitrios Michelogiannakis
- Division of Orthodontics and Dentofacial Orthopedics, Eastman Institute for Oral Health, University of Rochester, Rochester, New York, USA
| | - Lydia Kakali
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Theodore Eliades
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Phoebus Madianos
- Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
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Behm C, Nemec M, Weissinger F, Rausch MA, Andrukhov O, Jonke E. MMPs and TIMPs Expression Levels in the Periodontal Ligament during Orthodontic Tooth Movement: A Systematic Review of In Vitro and In Vivo Studies. Int J Mol Sci 2021; 22:6967. [PMID: 34203475 PMCID: PMC8268288 DOI: 10.3390/ijms22136967] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/11/2022] Open
Abstract
Background: During orthodontic tooth movement (OTM), applied orthodontic forces cause an extensive remodeling of the extracellular matrix (ECM) in the periodontal ligament (PDL). This is mainly orchestrated by different types of matrix metalloproteinases (MMPs) and their tissue inhibitors of matrix metalloproteinases (TIMPs), which are both secreted by periodontal ligament (PDL) fibroblasts. Multiple in vitro and in vivo studies already investigated the influence of applied orthodontic forces on the expression of MMPs and TIMPs. The aim of this systematic review was to explore the expression levels of MMPs and TIMPs during OTM and the influence of specific orthodontic force-related parameters. Methods: Electronic article search was performed on PubMed and Web of Science until 31 January 2021. Screenings of titles, abstracts and full texts were performed according to PRISMA, whereas eligibility criteria were defined for in vitro and in vivo studies, respectively, according to the PICO schema. Risk of bias assessment for in vitro studies was verified by specific methodological and reporting criteria. For in vivo studies, risk of bias assessment was adapted from the Joanna Briggs Institute Critical Appraisal Checklist for analytical cross-sectional study. Results: Electronic article search identified 3266 records, from which 28 in vitro and 12 in vivo studies were included. The studies showed that orthodontic forces mainly caused increased MMPs and TIMPs expression levels, whereas the exact effect may depend on various intervention and sample parameters and subject characteristics. Conclusion: This systematic review revealed that orthodontic forces induce a significant effect on MMPs and TIMPs in the PDL. This connection may contribute to the controlled depletion and formation of the PDLs' ECM at the compression and tension site, respectively, and finally to the highly regulated OTM.
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Affiliation(s)
- Christian Behm
- Clinical Division of Orthodontics, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria; (C.B.); (M.N.); (M.A.R.); (E.J.)
- Competence Centre for Periodontal Research, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria;
| | - Michael Nemec
- Clinical Division of Orthodontics, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria; (C.B.); (M.N.); (M.A.R.); (E.J.)
| | - Fabian Weissinger
- Competence Centre for Periodontal Research, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria;
| | - Marco Aoqi Rausch
- Clinical Division of Orthodontics, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria; (C.B.); (M.N.); (M.A.R.); (E.J.)
- Competence Centre for Periodontal Research, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria;
| | - Oleh Andrukhov
- Competence Centre for Periodontal Research, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria;
| | - Erwin Jonke
- Clinical Division of Orthodontics, University Clinic of Dentistry, Sensengasse 2A, 1090 Vienna, Austria; (C.B.); (M.N.); (M.A.R.); (E.J.)
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Role of Oxygen Supply in Macrophages in a Model of Simulated Orthodontic Tooth Movement. Mediators Inflamm 2020; 2020:5802435. [PMID: 32831635 PMCID: PMC7424081 DOI: 10.1155/2020/5802435] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/22/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023] Open
Abstract
Apart from periodontal ligament fibroblasts, immune cells like macrophages also play an important mediating role in orthodontic tooth movement (OTM). Upon orthodontic force application to malpositioned teeth, macrophages in the periodontal ligament get exposed to both mechanical strain and hypoxic conditions (via a compression of blood vessels). In this study, we assessed the relative impact of orthodontically induced mechanical strain and hypoxic conditions on macrophages for the mediation and regulation of OTM. Macrophages were stimulated with physiological orthodontic compressive forces of 2 g/cm2 for 4 h and 24 h on gas-impermeable or gas-permeable cell culture plates under normoxic or hypoxic cell culture conditions. We quantified expression of genes involved in inflammation (Tnf, Il-6, and Cox-2), extracellular remodelling (Mmp-9), and angiogenesis (Vegf) by RT-qPCR. Furthermore, we analysed HIF-1α, prostaglandin-E2, and VEGF protein expression via immunoblotting or ELISA. Mechanical strain and oxygen supply both differentially affected expression of genes and proteins involved in inflammation and angiogenesis. In this context, we found that HIF-1α protein levels were elevated by combined mechanical strain and hypoxic conditions, whereas gas-permeable plates providing sufficient oxygen supply prevented HIF-1α stabilization at the protein level after pressure application on macrophages. Our results thus indicate that macrophages involved in the mediation of OTM are affected by and respond differently to hypoxic conditions and mechanical compressive strain, which occur concomitantly during OTM, than periodontal ligament fibroblasts (PDLF), thus indicating different roles of these cells in the regulation of OTM at the cellular-molecular level. We further observed that contrary to PDLF HIF-1α stabilization in macrophages is rather induced via the decreased oxygen supply associated with OTM than via mechanotransduction by mechanical strain.
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9
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Gujar AN, Baeshen HA, Alhazmi A, Bhandi S, Raj AT, Patil S, Birkhed D. Cytokine levels in gingival crevicular fluid during orthodontic treatment with aligners compared to conventional labial fixed appliances: a 3-week clinical study. Acta Odontol Scand 2019; 77:474-481. [PMID: 31027423 DOI: 10.1080/00016357.2019.1607548] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Objective: To test the hypothesis that the levels of IL-1ß and TNF-α increased more and IL-1α, IL-2, IL-6, IL-8 increased less, after 3 weeks of treatment with conventional labial fixed appliance and with aligners. Material and methods: Forty patients who were treated either with labial brackets (n = 20) or aligners (n = 20). Gingival crevicular fluid (GCF) samples were collected at baseline and after 21 days. Cytokine levels were evaluated by enzyme-linked immune sorbent assay (ELISA). Plaque index (PI), gingival index (GI), and bleeding on probing (POB) were also examined. Results: The levels of IL-1α, IL-1ß, IL-2, IL-6, IL-8 and TNF-α in the GCF were significantly increased in both groups. The levels of IL-2, IL-6, IL-8 increased more in patients treated with aligners compared to those treated by labial fixed appliances. There was a statistically significant difference in change of the mean cytokine levels of IL-1α, IL-2, IL-6, IL-8 and TNF-α compared to labial fixed appliances and aligners. Conclusions: The levels of the six studied cytokines in GCF (IL-1α, IL-1ß, IL-2, IL-6, IL-8 and TNF-α) increased after 3 weeks both after treatment with conventional labial fixed appliance and with aligners. IL-1ß and TNF-α showed a prominent increase compared to the other cytokines in the GCF of teeth by both the labial fixed appliance and aligners. However, there were only minor differences in the changes of the cytokine levels from baseline to 3 weeks between the two groups. There were no differences between the groups regarding PI, GI or POB.
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Affiliation(s)
| | - Hosam Ali Baeshen
- College of Dentistry, King Abdulaziz University and Alfarabi Private College for Dentistry and Nursing, Jeddah, Saudi Arabia
| | - Anwar Alhazmi
- College of Dentistry Jazan University, Jazan, Saudi Arabia
| | - Shilpa Bhandi
- College of Dentistry Jazan University, Jazan, Saudi Arabia
| | - A. Thirumal Raj
- Sri Venkateswara Dental College and Hospital, Chennai, India
| | | | - Dowen Birkhed
- Professor Emeritus at the University of Gothenburg, Gothenburg, Sweden
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Lack of association between matrix metalloproteinase-1 gene rs1799750 polymorphism and osteoarthritis susceptibility: a meta-analysis. Biosci Rep 2019; 39:BSR20181960. [PMID: 30886066 PMCID: PMC6465197 DOI: 10.1042/bsr20181960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 02/19/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022] Open
Abstract
Background. A relationship between matrix metalloproteinase-1 (MMP-1)-1607 (rs1799750) gene polymorphism and osteoarthritis (OA) susceptibility was reported in the Bioscience Reports journal; however, these results were inconsistent. To evaluate the specific relationship, we used a meta-analysis study to clarify the controversy. Methods. The relevant articles were retrieved on 20 October 2018 from PubMed, Elsevier, Springer, Ebase (Ovid), and Google Scholar. The number of alleles and genotypes for MMP-1 was obtained. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to estimate the association between MMP-1-1607 (rs1799750) 1G/2G promoter polymorphism and OA, while the Egger’s test was used to assess heterogeneity among studies and publication bias. All statistical analyses were conducted using STATA 12.0 software. Results. A total of six case–control studies covering 1133 cases and 1119 controls were included in the final meta-analysis. There was no significant association between MMP-1-1607 1G/2G promoter polymorphism and OA in all genetic models (2G versus 1G: OR = 1.12, 95% CI = 0.78–1.60; 1G/2G versus 1G/1G: OR = 0.73, 95% CI = 0.32–1.67; 2G/2G versus 1G/1G: OR = 1.31, 95% CI = 0.57–2.98; the recessive model: OR = 1.23, 95% CI = 0.63-2.41; and the dominant model: OR = 1.25, 95% CI = 0.79–1.97). We obtained similar results for the subgroup analysis using ethnicity and type of disease. Conclusion. We systematically investigated the association between MMP-1-1607 (rs1799750) 1G/2G polymorphism and OA susceptibility; however, the results show no correlation.
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Kong Q, Jin Y, Yan S, Wang Y, Zhao J, Feng Z, Wei J, Wang Y, Kong L, Guo L, Yang J. Examining the association of MMP-1 gene -1607 (2G/1G) and -519 (A/G) polymorphisms with the risk of osteomyelitis: A case-control study. Medicine (Baltimore) 2017; 96:e4969. [PMID: 29049163 PMCID: PMC5662329 DOI: 10.1097/md.0000000000004969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
To investigate the effects of matrix metalloproteinase-1 (MMP-1) gene polymorphisms on the onset of osteomyelitis in Chinese Han population.In all, 80 osteomyelitis patients (case group) and 81 healthy people (control group) were recruited into this case-control study. Polymerase chain reaction-restriction fragment length polymorphism method was utilized to examine the genotypes of MMP-1 polymorphisms (-1607 2G/1G and -519A/G) in the 2 groups. Genotype and allele differences between the case and control groups were analyzed by chi-square test. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated to present the association strength between MMP-1 gene polymorphisms and osteomyelitis.Frequencies of -1607 2G/2G genotype between the case and control groups were statistically significant (P = .025). Compared with 1G/1G genotype carriers, the 2G/2G genotype carriers had 1.605 times risk of developing osteomyelitis (OR 2.605, 95% CI 1.116-6.082). Meanwhile, the 2G allele significantly associated with the risk of osteomyelitis (OR 1.735, 95% CI 1.115-2.701). In addition, frequency of -519GG genotype was obviously higher in case group than that in control group (P = .024), and GG genotype related to an increased risk of osteomyelitis (OR 2.792, 95% CI 1.127-6.917). Whereas, the -519G allele may be a susceptible factor for osteomyelitis (OR 1.622, 95% CI 1.038-2.536).The MMP-1 -1607 (2G/1G) and -519 (A/G) polymorphisms may contribute to the onset of osteomyelitis.
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Affiliation(s)
- Qingzhu Kong
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Yu Jin
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Shi Yan
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Yin Wang
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Jingxin Zhao
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Zhen Feng
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Junqiang Wei
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Yu Wang
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Lingwei Kong
- Trauma 2 Ward, Southern District of Affiliated Hospital of Chengde Medical College
| | - Litao Guo
- Department of Ophthalmology, Affiliated Hospital of Chengde Medical College
| | - Jianing Yang
- Second Spine Surgery, Southern District of Affiliated Hospital of Chengde Medical College, Chengde, Hebei, China
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