1
|
Elshazly TM, Bourauel C, Chavanne P, Elattar H, Keilig L. Numerical biomechanical finite element analysis of different trimming line designs of orthodontic aligners: An in silico study. J World Fed Orthod 2024; 13:65-71. [PMID: 38395726 DOI: 10.1016/j.ejwf.2024.01.001] [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: 12/04/2023] [Revised: 12/23/2023] [Accepted: 01/03/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND A finite element model was used to investigate the effect of different designs and thicknesses of orthodontic aligner margins on their biomechanical behavior. METHODS A three-dimensional data set of an upper jaw was imported into the 3-matic software. The upper right central incisor tooth (Tooth 11) was separated from the remaining model, and its periodontal ligament and surrounding bone were designed. Aligners were designed with four different trimming lines (scalloped, straight, scalloped extended, straight extended), each with four different thicknesses (0.3, 0.4, 0.5, and 0.6 mm). The models were imported into a finite element package (Marc/Mentat). A linear elastic constitutive material model was applied. A facial 0.2 mm bodily malalignment of tooth 11 was simulated. RESULTS The maximum resultant force was in the range of 1.0 N to 2.2 N. The straight trimming designs deliver higher resultant forces compared with scalloped trimming designs. Increasing the aligner thickness and/or extending the aligner edge beyond the gingival line leads to an increase in the resultant force. All designs showed an uneven distribution of the normal contact forces over the tooth surface with a predominant concentration toward the cervical third and distal third, particularly with the extended trimming designs. All designs showed uncontrolled tipping of the tooth. CONCLUSIONS Based on the current model outcomes, the use of a straight extended trimming line design for aligners is favored because of its positive impact on force distribution and, consequently, the control of tooth movement. CLINICAL RELEVANCE These findings provide aligner companies and orthodontists a valuable biomechanical evidence and guidance to enhance control over tooth movement and therefore optimize treatment outcomes. This can be achieved by trimming the edges of aligners with a straight extended design and selecting the appropriate aligner thickness.
Collapse
Affiliation(s)
- Tarek M Elshazly
- Oral Technology, Dental School, University Hospital Bonn, Bonn, Germany.
| | | | | | - Hanaa Elattar
- Orthodontic Department, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt
| | - Ludger Keilig
- Oral Technology, Dental School, University Hospital Bonn, Bonn, Germany; Department of Dental Prosthetics, Propaedeutics and Materials Science, Dental School, University Hospital Bonn, Bonn, Germany
| |
Collapse
|
2
|
Kivi MK, Jafarzadeh A, Hosseini-Baharanchi FS, Salehi S, Goodarzi A. The efficacy, satisfaction, and safety of carbon dioxide (CO2) fractional laser in combination with pulsed dye laser ( PDL) versus each one alone in the treatment of hypertrophic burn scars: a single-blinded randomized controlled trial. Lasers Med Sci 2024; 39:69. [PMID: 38376542 DOI: 10.1007/s10103-024-03976-6] [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: 07/08/2023] [Accepted: 01/02/2024] [Indexed: 02/21/2024]
Abstract
The tendency to use less-invasive laser-based methods with far more obvious effectiveness has been taken into consideration today for improvement of burning scars. The present study thus aimed to assess the efficacy of two laser-based techniques including pulsed dye laser (PDL) and ablative fractional CO2 laser (AFCL) and its combination on improving different aspects of burning scars regardless of the types of scar as hypertrophic or keloid scars. This randomized single-blinded clinical trial was performed on patients suffering hypertrophic or keloid burning scars. The patients were randomly assigned into three groups scheduling for treatment with PDL alone, AFCL alone, or its combination. All patients were visited before and 40 days after the last treatment session, and their scars were assessed. In all groups, significant improvement was revealed in the Vancouver scar scale (VSS) score, the color of scar, vascular bed in the scar, the and height of scar and its pliability; however, the improvement in each item was more highlighted in the group receiving a combination therapy with PDL and AFCL techniques. In this regard, the highest improvement was found in vascular bed and pliability in the combination therapy group as compared to other groups. Although the superiority of the combined group was not statistically significant, due to the high percentage of improvement in total VSS and most of its indicators, it can be clinically significant. The efficacy of the treatment protocols was different considering subgroups of mature and immature scars (less than 1 year), so that more improvement in pliability of scar, vascularity, and color of scar was found in the group scheduling for PDL + AFCL as compared to those who were treated with PDL alone in immature scar group but not in mature scar group. Combined treatment can be much more effective in improving the appearance and pathological characteristics of scars than each individual treatment. This effectiveness can be seen mainly in immature scars.
Collapse
Affiliation(s)
- Maedeh Karimi Kivi
- Medical Students Association, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Alireza Jafarzadeh
- Department of Dermatology, Rasool Akram Medical Complex Clinical Research Development Center (RCRDC), School of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Fatemeh Sadat Hosseini-Baharanchi
- Minimally Invasive Surgery Research Center & Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Sadaf Salehi
- Medical Students Association, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Azadeh Goodarzi
- Department of Dermatology, Rasool Akram Medical Complex Clinical Research Development Center (RCRDC), School of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.
| |
Collapse
|
3
|
Roser CJ, Rues S, Erber R, Hodecker L, Lux CJ, Bauer CAJ. Tooth mobility restriction by multistranded and CAD/CAM retainers-an in vitro study. Eur J Orthod 2024; 46:cjad076. [PMID: 38086543 DOI: 10.1093/ejo/cjad076] [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] [Indexed: 01/12/2024]
Abstract
OBJECTIVES Orthodontic retainers should restrict physiological tooth mobility as little as possible. While this has been investigated for multistranded retainers, there is a lack of data for novel CAD/CAM retainers. To address this, the present study compared the restriction of physiological tooth mobility in multistranded retainers and different CAD/CAM retainers. MATERIAL/METHODS One group of multistranded (n = 8) and five groups of CAD/CAM retainers (nickel-titanium (NiTi), titanium grade 5 (Ti5), polyetheretherketone (PEEK), zirconia (ZrO2), and cobalt-chromium (CoCr); each n = 8) bonded from canine to canine were investigated for their influence on vertical and horizontal tooth mobility using an in vitro model of a lower arch in a universal testing machine. Load-deflection curves were determined and statistically analysed. RESULTS All retainers restricted tooth mobility to varying extents. The retainers had less of an influence on vertical tooth mobility, with less of a difference between retainers (14%-38% restriction). In contrast, significant (P ≤ 0.05) differences were observed between retainers in the restriction of horizontal tooth mobility. ZrO2 retainers had the greatest impact, restricting horizontal tooth mobility by 82% (68 ± 20 µm/100N), followed by CoCr (75%, 94 ± 26 µm/100N) and PEEK (73%, 103 ± 28 µm/100N) CAD/CAM retainers, which had comparable effects on horizontal tooth mobility. Ti5 (54%, 175 ± 66 µm/100N) and NiTi (34%, 248 ± 119 µm/100N) CAD/CAM retainers had less of an influence on horizontal tooth mobility, and were comparable to multistranded retainers (44%, 211 ± 77 µm/100N). LIMITATIONS This is an in vitro study, so clinical studies are needed to draw clinical conclusions. CONCLUSIONS Multistranded and CAD/CAM retainers have different effects on tooth mobility in vitro. These effects should be further explored in future in vivo studies.
Collapse
Affiliation(s)
- Christoph J Roser
- Department of Orthodontics and Dentofacial Orthopaedics, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, Germany
| | - Stefan Rues
- Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 400, Heidelberg, Germany
| | - Ralf Erber
- Department of Orthodontics and Dentofacial Orthopaedics, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, Germany
| | - Lutz Hodecker
- Department of Orthodontics and Dentofacial Orthopaedics, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, Germany
| | - Christopher J Lux
- Department of Orthodontics and Dentofacial Orthopaedics, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, Germany
| | - Carolien A J Bauer
- Department of Orthodontics and Dentofacial Orthopaedics, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, Germany
| |
Collapse
|
4
|
Mylona V, Anagnostaki E, Chiniforush N, Barikani H, Lynch E, Grootveld M. Photobiomodulation Effects on Periodontal Ligament Stem Cells: A Systematic Review of In Vitro Studies. Curr Stem Cell Res Ther 2024; 19:544-558. [PMID: 35638280 DOI: 10.2174/1574888x17666220527090321] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 02/03/2022] [Revised: 03/24/2022] [Accepted: 04/12/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Stem cell therapy has been considered to play a paramount role in the treatment modalities available for regenerative dentistry. The established beneficial effects of photobiomodulation (PBM) at the cellular level have led to the combined use of these two factors (PBM and stem cells). The main goal of this study was firstly to critically appraise the effects of PBM on periodontal ligament stem cells (PDLSCs), and secondly to explore the most effective PBM protocols applied. METHODS Pubmed, Cochrane, Scopus, Science Direct, and Google Scholar search engines were used to identify experimental in vitro studies in which PBM was applied to cultured PDLSCs. After applying specific keywords, additional filters, and inclusion/exclusion criteria, a preliminary number of 245 articles were narrowed down to 11 in which lasers and LEDs were used within the 630 - 1064 nm wavelength range. Selected articles were further assessed by three independent reviewers for strict compliance with PRISMA guidelines, and a modified Cochrane risk of bias to determine eligibility. STATISTICAL ANALYSIS The dataset analysed was extracted from the studies with sufficient and clearly presented PBM protocols. Simple univariate regression analysis was performed to explore the significance of contributions of potential quantitative predictor variables toward study outcomes, and a one-way ANOVA model was employed for testing differences between the laser or LED sources of the treatments. The significance level for testing was set at α = 0.05. RESULTS The proliferation rate, osteogenic differentiation, and expression of different indicative genes for osteogenesis and inflammation suppression were found to be positively affected by the application of various types of lasers and LEDs. With regard to the PBM protocol, only the wavelength variable appeared to affect the treatment outcome; indeed, the 940 nm wavelength parameter was found not to exert a favourable effect. CONCLUSIONS Photobiomodulation can enhance the stemness and differentiation capacities of periodontal ligament stem cells. Therefore, for PBM protocols, there remains no consensus amongst the scientific community. Statistical analyses performed here indicated that the employment of a near-infrared (NIR) wavelength of 940 nm may not yield a significant favourable outcome, although those within the 630 - 830 nm range did so. Concerning the fluence, it should not exceed 8 J/cm2 when therapy is applied by LED devices, and 4 J/cm2 when applied by lasers, respectively.
Collapse
Affiliation(s)
- Valina Mylona
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | | | - Nasim Chiniforush
- Laser Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamidreza Barikani
- Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Edward Lynch
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - Martin Grootveld
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| |
Collapse
|
5
|
Eckembrecher FJ, Eckembrecher DG, Camacho I, Shah H, Jaalouk D, Nouri K. A review of treatment of port-wine stains with pulsed dye laser in fitzpatrick skin type IV-VI. Arch Dermatol Res 2023; 315:2505-2511. [PMID: 37253863 DOI: 10.1007/s00403-023-02640-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 03/12/2023] [Revised: 03/12/2023] [Accepted: 05/17/2023] [Indexed: 06/01/2023]
Abstract
Port-Wine Stains are a congenital vascular malformation that affect 0.3-0.5% of newborns. It is a benign capillary malformation that commonly occurs on the head and neck. It is formed by progressive dilation of the post-capillary venules, and as the patient ages it may be associated with hypertrophy and nodularity which can lead to cosmetic disfigurement and psychological aggravation. There are many choices of treatment such as cryosurgery, cosmetic tattooing, and dermabrasion, amongst others. The treatment of choice is pulse dye laser (PDL) because it is both effective and safe to use. In darker skin types (Fitzpatrick skin types IV-VI), treatment is more difficult. Caution when treating darker skin types with PDL comes from the fact that there is an inverse correlation between vessel specificity of the PDL and skin pigmentation. In this review, we will be reviewing the literature and discussing the manuscripts that describe the treatment of PWS on patients with fitzpatrick skin type IV-VI. Authors searched the PubMed Medline in the English language from database inception through December 2022 for eligible articles. The keywords searched included "PDL," "pulse dye laser," "skin of color," "Fitzpatrick skin types IV-VI," "fitzpatrick," "pigmented skin," "Port-wine stain," "PWS", and "pulse dye laser." The articles that were included discussed PDL in the treatment of PWS in patients of skin of color. Any additional similar articles that were cited in our search were also included. Articles that were excluded did not discuss Fitzpatrick skin types IV-VI, darker skin type, or PDL. Data collected from each article included the number of participants, Fitzpatrick skin type, age, and laser parameters. There were 120 articles that were reviewed from our search and a total of nine articles met inclusion criteria with 241 patients that were considered Fitzpatrick skin type IV-VI. The patients were of a wide range of ages from 1 month to 74 years old. In our review, patients who are treated at a younger age had better results than when treated at an older age. The results show that darker skin individuals have better results when treated at a younger age compared to adults, they can experience complete resolution. Adults who were treated saw a variation of results, from improvements in the appearance to hyperpigmentation/hypopigmentation or scarring of the treated area. Patients who are Fitzpatrick skin type IV-VI are at higher risk of adverse events when treated with PDL for PWS when compared to patients of other skin types. Studies show that PDL can be beneficial for PWS in patients of skin of color; however, there are risks of hyperpigmentation, hypopigmentation, and scarring that are important to take into consideration when treating these patients. Further research is warranted to improve the understanding of PDL for PWS in patients of skin of color.
Collapse
Affiliation(s)
- Francelia J Eckembrecher
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
- San Juan Bautista School of Medicine, Caguas, PR, USA.
| | - Daphne G Eckembrecher
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
- San Juan Bautista School of Medicine, Caguas, PR, USA
| | - Isabella Camacho
- MedStar Washington Hospital Center/Georgetown University Hospital, Washington, DC, USA
| | | | - Dana Jaalouk
- Florida State University College of Medicine, Tallahassee, USA
| | - Keyvan Nouri
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| |
Collapse
|
6
|
Noori M, Azizi S, Mahjoubfar A, Abbasi Varaki F, Fayyaz F, Mousavian AH, Bashash D, Kardoust Parizi M, Kasaeian A. Efficacy and safety of immune checkpoint inhibitors for patients with prostate cancer: a systematic review and meta-analysis. Front Immunol 2023; 14:1181051. [PMID: 38022569 PMCID: PMC10644317 DOI: 10.3389/fimmu.2023.1181051] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 09/04/2023] [Indexed: 12/01/2023] Open
Abstract
Immunotherapy has revolutionized the treatment paradigm of many cancers, however, its effectiveness in prostate cancer patients is still under question. In the present systematic review and meta-analysis, we sought for assessing the efficacy and safety of Immune checkpoint inhibitors (ICIs) in patients with prostate cancer. PubMed, Scopus, Web of Science, and EMBASE databases were searched on Aguste 19, 2022. Thirty five studies met the eligibility criteria. The median overall survival (mOS) of all treatments was 14.1 months, with the longest and shortest mOS was seen among patients who received anti-CTLA-4 monotherapy and anti-PD-1/PD-L1+anti-CTLA-4 regimen at 24.9 and 9.2 months, respectively. Noteworthy, all types of adverse events had the lowest incidence in the anti-PD-1/PD-L1 monotherapy group. Considering the ICI monotherapy regimens, we found that fatigue, diarrhea, and infusion reaction had the highest incidence rates. Future studies evaluating the efficacy and safety of novel combination therapies with ICIs are warranted.
Collapse
Affiliation(s)
- Maryam Noori
- Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Hematology, Oncology and Stem Cell Transplantation Research Center, Research Institute for Oncology, Hematology and Cell Therapy, Tehran University of Medical Sciences, Tehran, Iran
| | - Shadi Azizi
- Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Aref Mahjoubfar
- Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farhan Abbasi Varaki
- Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farimah Fayyaz
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Amir-Hossein Mousavian
- Hematology, Oncology and Stem Cell Transplantation Research Center, Research Institute for Oncology, Hematology and Cell Therapy, Tehran University of Medical Sciences, Tehran, Iran
- Digestive Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Davood Bashash
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Kardoust Parizi
- Department of Urology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Department of Urology, Medical University of Vienna, Vienna, Austria
| | - Amir Kasaeian
- Hematology, Oncology and Stem Cell Transplantation Research Center, Research Institute for Oncology, Hematology and Cell Therapy, Tehran University of Medical Sciences, Tehran, Iran
- Digestive Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Clinical Research Development Unit, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
7
|
Roth CE, Niederau C, Radermacher C, Rizk M, Neuss S, Jankowski J, Apel C, Craveiro RB, Wolf M. Knockout of Bone Sialoprotein in Cementoblasts Cell Lines Affects Specific Gene Expression in Unstimulated and Mechanically Stimulated Conditions. Ann Anat 2023; 249:152102. [PMID: 37150306 DOI: 10.1016/j.aanat.2023.152102] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/28/2023] [Accepted: 04/17/2023] [Indexed: 05/09/2023]
Abstract
One of the major components in cementum extracellular matrix is bone sialoprotein (BSP). BSP knockout (Ibsp) mice were reported to have a nonfunctional hypo-mineralized cementum, as well as detachment and disorganization of the periodontal ligament tissue. However, studies investigating the influence of Ibsp in cementoblasts are missing yet. This study investigates the influences of Bsp in three cementoblasts cell lines (OCCM.30-WT,IbspΔNterm, and IbspKAE). The mRNA expression of cementoblast and osteoclast markers (Col1a1, Alpl, Ocn, Runx2, Ctsk, Rankl and Opg) and the cell morphology were compared. Additionally, a functional monocyte adhesion assay was performed. To understand the influence of external stimuli, the effect of Ibsp was investigated under static compressive force, mimicking the compression side of orthodontic tooth movement. Cementoblasts with genotype IbspΔNterm and IbspKAE showed slight differences in cell morphology compared to OCCM.30-WT, as well as different gene expression. Under compressive force, the Ibsp cell lines presented expression pattern markers similar to the OCCM.30-WT cell line. However, Cathepsin K was strongly upregulated in IbspΔNterm cementoblasts under compressive force. This study provides insight into the role of BSP in cementoblasts and explores the influence of BSP on periodontal ligament tissues. BSP markers in cementoblasts seem to be involved in the regulation of cementum organization as an important factor for a functional periodontium. In summary, our findings provide a basis for investigations regarding molecular biology interactions of BSP in cementoblasts, and a supporting input for understanding the periodontal and cellular cementum remodeling.
Collapse
Affiliation(s)
- Charlotte E Roth
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany; Correspondence to: Pauwelsstr. 30, 52074 Aachen, Germany. E-mail:
| | - Christian Niederau
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany
| | - Chloé Radermacher
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany; Helmholtz Institute for Biomedical Engineering, Bionterface Group, RWTH Aachen University, 52056 Aachen, Germany; Institute of Pathology, RWTH Aachen University Hospital, 52074, Germany
| | - Marta Rizk
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany
| | - Sabine Neuss
- Helmholtz Institute for Biomedical Engineering, Bionterface Group, RWTH Aachen University, 52056 Aachen, Germany; Institute of Pathology, RWTH Aachen University Hospital, 52074, Germany
| | - Joachim Jankowski
- Institute for Molecular Cardiovascular Research, University Hospital RWTH Aachen, Germany
| | - Christian Apel
- Department of Biohybrid & Medical Textiles (BioTex), Institut of Applied Medical Engineering, RWTH Aachen University & Hospital, Germany
| | - Rogerio B Craveiro
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany; Correspondence to: Pauwelsstr. 30, 52074 Aachen, Germany. E-mail:
| | - Michael Wolf
- Department of Orthodontics, Dental Clinic, University of Aachen, 52074 Aachen, Germany
| |
Collapse
|
8
|
Folwaczny M, Ahantab R, Kessler A, Ern C, Frasheri I. Cytotoxicity of 3D printed resin materials for temporary restorations on human periodontal ligament ( PDL-hTERT) cells. Dent Mater 2023; 39:529-537. [PMID: 37055304 DOI: 10.1016/j.dental.2023.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 04/15/2023]
Abstract
OBJECTIVES Various dental resin materials are available for the fabrication of temporary restorations using modern additive printing methods. Albeit these materials are placed for several months in intimate contact with dental hard and soft tissues, including the gingival crevice, there exists only insufficient evidence on the biocompatibility of these materials. This in vitro study aimed to delineate the biocompatibility of 3D printable materials on periodontal ligament cells (PDL-hTERTs). METHODS Samples of four dental resin materials for additive fabrication of temporary restorations using 3D printing (MFH, Nextdent; GC Temp, GC; Freeprint temp, Detax; 3Delta temp, Deltamed), one material for subtractive fabrication (Grandio disc, Voco) and one conventional temporary material (Luxatemp, DMG) were prepared with a standardized size according to the manufacturer's instructions. Human PDL-hTERTs were exposed to resin specimens or eluates of the material for 1, 2, 3, 6 and 9 days. For determination of cell viability, XTT assays were performed. In addition, the expression of the proinflammatory cytokines interleukin 6 and 8 (IL-6 and 8) was assessed in the supernatants with ELISA. Cell viability and the expression of IL-6 and 8 in presence of the resin material or their eluates was compared with untreated controls. Immunofluorescence staining for IL-6 and IL-8, as well as scanning electron microscopy of the discs after culturing, were performed. Differences between groups were analyzed with Student´s t-test for unpaired samples. RESULTS Compared to untreated control samples, the exposure against the resin specimen induced strong reduction of cell viability in case of the conventional material Luxatemp (p < 0.001) and the additive material 3Delta temp (p < 0.001) irrespective of the observation period. On the contrary, the presence of eluates of the various materials induced only minor changes in cell viability. Considering IL-6 (day 2: p = 0.001; day 6 and 9: p < 0.001) and IL-8 (day 1: p = 0.001; day 2, 3, 6, 9: p < 0.001) their expression was strongly reduced in presence of the eluate of Luxatemp. Except for IL-6 at day 1 and 6 also the material 3Delta temp caused significant reduction of both proinflammatory mediators at any time point. SIGNIFICANCE The conventional material Luxatemp and the additive material 3Delta temp appear to severely affect cell viability when in direct contact with PDL-hTERTs. The other tested materials of this new category of additive materials and the subtractive material Grandio seem to induce only minor changes in direct contact with these cells. Therefore, they could serve as a viable alternative in the fabrication of temporary restorations.
Collapse
Affiliation(s)
- Matthias Folwaczny
- Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestr. 70, D-80336 Munich, Germany.
| | - Roya Ahantab
- Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestr. 70, D-80336 Munich, Germany
| | - Andreas Kessler
- Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestr. 70, D-80336 Munich, Germany
| | - Christina Ern
- Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestr. 70, D-80336 Munich, Germany
| | - Iris Frasheri
- Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestr. 70, D-80336 Munich, Germany
| |
Collapse
|
9
|
Liu XJ, Lei Y, Gold MH, Tan J. Efficacy of pulsed dye laser combined with fractional CO 2 laser in the treatment of pediatric burn scars. Lasers Surg Med 2023. [PMID: 37021488 DOI: 10.1002/lsm.23648] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/12/2023] [Accepted: 02/21/2023] [Indexed: 04/07/2023]
Abstract
OBJECTIVE The present study aimed to investigate the efficacy and safety of pulsed dye laser (PDL) combined with fractional CO2 laser in the treatment of burn scars in pediatric patients. METHODS The present retrospective study enrolled 60 pediatric patients with burn scars from July 2017 to June 2021. In the 4-month treatment period, all patients received PDL treatment every 1 month and received fractional CO2 laser treatment every 3 months. The Patient and Observer Scar Assessment Scale (POSAS) was used to evaluate the scar condition before the treatment as well as 6 months after the whole treatment. The satisfaction of the patient's parents was collected and recorded 6 months after the treatment. Complications were recorded during the treatment period and at follow-up visits. RESULTS Among all patients, 38 (63.33%) cases were scald-induced scars and 22 (36.67%) cases were burn-induced scars. The mean diameter of the scar area was 107.53 ± 2.92 cm2 . For the measurement of the patient part of POSAS, all indices of pain, itching, color, stiffness, thickness, and irregularity, as well as the total scores were remarkably lower after 6 months of the treatment compared with the baseline (p < 0.05). For the observer part of POSAS, the indices of vascularization, pigmentation, thickness, relief, pliability, and surface area, as well as the total scores were markedly decreased after treatment (p < 0.05). The total satisfactory rate was 96.67% (58/60). No severe complications nor scar aggravation was observed. CONCLUSION The combination of PDL and fractional CO2 laser showed good efficacy in the treatment of pediatric patients with burn scars with no severe complications and can be recommended in clinical application.
Collapse
Affiliation(s)
- Xiao-Jia Liu
- Department of Plastic and Laser Cosmetic, Hunan Provincial People's Hospital, Changsha, Hunan, China
| | - Ying Lei
- Department of Plastic and Laser Cosmetic, Hunan Provincial People's Hospital, Changsha, Hunan, China
| | | | - Jun Tan
- Department of Plastic and Laser Cosmetic, Hunan Provincial People's Hospital, Changsha, Hunan, China
| |
Collapse
|
10
|
Misiurev D, Kaspar P, Holcman V. Brief Theoretical Overview of Bi-Fe-O Based Thin Films. Materials (Basel) 2022; 15:ma15248719. [PMID: 36556529 PMCID: PMC9784397 DOI: 10.3390/ma15248719] [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] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/16/2022] [Accepted: 12/05/2022] [Indexed: 05/14/2023]
Abstract
This paper will provide a brief overview of the unique multiferroic material Bismuth ferrite (BFO). Considering that Bismuth ferrite is a unique material which possesses both ferroelectric and magnetic properties at room temperature, the uniqueness of Bismuth ferrite material will be discussed. Fundamental properties of the material including electrical and ferromagnetic properties also will be mentioned in this paper. Electrical properties include characterization of basic parameters considering the electrical resistivity and leakage current. Ferromagnetic properties involve the description of magnetic hysteresis characterization. Bismuth ferrite can be fabricated in a different form. The common forms will be mentioned and include powder, thin films and nanostructures. The most popular method of producing thin films based on BFO materials will be described and compared. Finally, the perspectives and potential applications of the material will be highlighted.
Collapse
|
11
|
Nam YS, Yang DW, Moon JS, Kang JH, Cho JH, Kim OS, Kim MS, Koh JT, Kim YJ, Kim SH. Sclerostin in Periodontal Ligament: Homeostatic Regulator in Biophysical Force-Induced Tooth Movement. J Clin Periodontol 2022; 49:932-944. [PMID: 35373367 DOI: 10.1111/jcpe.13624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 02/25/2022] [Accepted: 03/29/2022] [Indexed: 11/30/2022]
Abstract
AIM This study elucidates the role of sclerostin in periodontal ligament (PDL) as a homeostatic regulator in biophysical force-induced tooth movement (BFTM). MATERIALS AND METHODS BFTM was performed in rats, followed by microarray, immunofluorescence, in situ hybridization, and real-time PCR for detection and identification of the molecules. The periodontal space was analyzed via micro-computed tomography. Effects on osteoclastogenesis and bone resorption were evaluated in mouse bone marrow-derived cells. In vitro human PDL cells were subjected to biophysical forces. RESULTS In the absence of BFTM, sclerostin was hardly detected in the periodontium except the PDL and alveolar bone in the furcation region and apex of the molar roots. However, sclerostin was upregulated in the PDL in vivo by adaptable force, which induced typical transfiguration without changes in periodontal space as well as in vitro PDL cells under compression and tension. In contrast, the sclerostin level was unaffected by heavy force, which caused severe degeneration of the PDL and narrowed periodontal space. Sclerostin inhibited osteoclastogenesis and bone resorption, which corroborates the accelerated tooth movement by the heavy force. CONCLUSIONS Sclerostin in PDL may be a key homeostatic molecule in the periodontium and a biological target for the therapeutic modulation of BFTM. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Yoo-Sung Nam
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Dong-Wook Yang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jung-Sun Moon
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jee-Hae Kang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jin-Hyoung Cho
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Min-Seok Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jeong-Tae Koh
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Young-Jun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| |
Collapse
|
12
|
Crump B, Reader A, Nusstein J, Drum M, Fowler S, Draper J. Prospective Study on PDL Anesthesia as an Aide to Decrease Palatal Infiltration Pain. Anesth Prog 2022; 69:10-17. [PMID: 35377934 DOI: 10.2344/anpr-68-03-03] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/04/2021] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE The purpose of this prospective randomized study was to assess using a periodontal ligament (PDL) injection as an aide to decrease palatal infiltration pain. METHODS A total of 133 subjects randomly received a PDL injection and alternative palatal infiltration or a mock PDL injection and conventional palatal infiltration at 2 separate appointments. PDL injection was given in the mid-palatal sulcus of the maxillary first molar. Mock PDL injection consisted of only needle insertion. All subjects then received a palatal infiltration administered into the blanched gingival tissue 3 mm (alternative palatal infiltration) or 7 mm (conventional palatal infiltration) from the gingival collar. Subjects recorded needle insertion and solution deposition pain using a Heft-Parker visual analog scale (VAS). RESULTS The combined PDL injection and alternative palatal infiltration had significantly decreased mean VAS ratings for needle insertion and solution deposition pain (P < .0001). Incidence of moderate/severe pain for needle insertion and solution deposition was reduced from 65% to 1% and from 65% to 2%, respectively. CONCLUSION Providing PDL anesthesia into the mid-palatal sulcus of the maxillary first molar and then administering an alternative palatal infiltration into the blanched collar around the PDL molar site led to significant reductions in needle insertion and solution deposition pain compared with a mock PDL and conventional palatal infiltration.
Collapse
Affiliation(s)
- Brian Crump
- Former Graduate Student in Endodontics, The Ohio State University, Columbus, Ohio
| | - Al Reader
- Emeritus Professor, Division of Endodontics, The Ohio State University, Columbus, Ohio
| | - John Nusstein
- Professor and Chair, Division of Endodontics, The Ohio State University, Columbus, Ohio
| | - Melissa Drum
- Professor and Graduate Program Director, Division of Endodontics, The Ohio State University, Columbus, Ohio
| | - Sara Fowler
- Associate Professor and Predoctoral Director, Division of Endodontics, The Ohio State University, Columbus, Ohio
| | - John Draper
- Assistant Professor, Fisher College of Business, The Ohio State University, Columbus, Ohio
| |
Collapse
|
13
|
Sharma A, Kroumpouzos G, Kassir M, Galadari H, Goren A, Grabbe S, Goldust M. Rosacea Management: A Comprehensive Review. J Cosmet Dermatol 2022; 21:1895-1904. [PMID: 35104917 DOI: 10.1111/jocd.14816] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/11/2022] [Indexed: 11/28/2022]
Abstract
Rosacea is a chronic cutaneous disorder affecting primarily the face, characterized by erythema, transient or persistent, telangiectasia, and inflammatory lesions including papulo-pustules and swelling. The essential component of the disease is the persistent erythema of facial skin. Episodes of flushing (acute-subacute intermittent vasodilation) are common. Swelling and erythema of the nose along with dilatation of the pilosebaceous poral orifices, known as rhinophyma, can be noted in chronic cases. Rosacea affects up to 10% of the world population and is especially noted in fair skinned individuals aged 35 to 50. Women are affected more often than men. Several treatment modalities including topical medications, systemic drugs, lasers and light-based therapies have been used for the management of rosacea with variable results. Topical medications such as azelaic acid, metronidazole, and sulfacetamide/sulphur, oral antibiotics such as tetracyclines, and oral retinoids alone or, most commonly, in combination form the mainstay of treatment. Light therapies such as intense pulsed light and pulsed dye laser are best used for the eythemato-telangiectatic type. Topical brimonidine, oxymetazoline, ivermectin, tacrolimus, pimercrolimus, low-dose modified release tetracyclines and botulinum toxin are the new additions to the therapeutic armamentarium. This article provides a comprehensive review of the various therapies used for rosacea.
Collapse
Affiliation(s)
- Anuj Sharma
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Govt. Medical College, Himachal Pradesh, Kangra (Tanda), India
| | - George Kroumpouzos
- Department of Dermatology, Alpert Medical School of Brown University Providence, Rhode Island, Department of Dermatology, Medical School of Jundiaí, São Paulo, Brazil.,GK Dermatology, PC, South Weymouth, Massachusetts, USA
| | - Martin Kassir
- Founding director, Worldwide laser institute, Dallas, USA
| | - Hassan Galadari
- College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Andy Goren
- Applied Biology, Inc, Irvine, CA, United States
| | - Stephan Grabbe
- Department of Dermatology, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Mohamad Goldust
- Department of Dermatology, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| |
Collapse
|
14
|
Abrouk M, Gianatasio C, Li Y, Waibel JS. Prospective study of intense pulsed light versus pulsed dye laser with or without blue light in the activation of PDT for the treatment of actinic keratosis and photodamage. Lasers Surg Med 2022; 54:66-73. [PMID: 35043459 DOI: 10.1002/lsm.23492] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/08/2022]
Abstract
BACKGROUND Exposure to ultraviolet (UV) light from the sun is known to have a deleterious effect on the skin. Repeated insults to the dermal matrix from UV radiation result in the clinical signs of photodamage, including changes in skin elasticity, color, and texture. UV radiation also leads to the accumulation of DNA mutations and promotes tumor development, resulting in the formation of cutaneous precancerous and cancerous lesions. Continuous-wave incoherent blue light, intense pulsed light (IPL), and pulsed dye laser (PDL) are safe and efficacious light sources commonly used for aminolevulinic acid photodynamic therapy (PDT). The aim of this study was to prospectively evaluate the efficacy of PDT for the treatment of photodamage and actinic keratoses using four different combinations of light sources: PDL, PDL + blue light, IPL, and IPL + blue light. STUDY A total of 220 patients with either photodamage or actinic keratosis (AK) were recruited from the Miami Dermatology Laser Institute (Miami, FL) and were assigned prospectively to undergo one PDT treatment with one of the four light options: PDL, PDL + blue light, IPL or IPL + blue light. Of the 220 patients enrolled in treatment groups, 214 patients completed the study. Of the 214 patients, 88 received treatment for AK, and 126 received treatment for photodamage. All patients gave their consent to participate in the study and to allow their photographs to be utilized for the purpose of scientific presentations. RESULTS Treatment with IPL resulted in a 70.8% reduction of actinic keratoses at a 1-month follow-up. Treatment with IPL and blue light 84.4% reduction of actinic keratoses at 1 month follow up. Treatment with PDL 70.5% reduction of actinic keratoses at 1 month follow up. Treatment with PDL and blue light 69.3% reduction of actinic keratoses at 1 month follow up. Treatment with IPL resulted in an improvement score of 2.9. Treatment with IPL and blue light resulted in an improvement score of 3.0. Treatment PDL resulted in an improvement score of 1.5. Treatment with PDL and blue light resulted in an improvement score of 1.8. CONCLUSION Although all four treatment groups led to some improvement in signs of photoaging, IPL + blue light again demonstrated increased efficacy when compared to IPL, PDL, and PDL + blue light treatment groups. Results from our study were limited by an unequal distribution between treatment groups and a lack of follow-up beyond a 1-month period and warrant further research.
Collapse
Affiliation(s)
- Michael Abrouk
- Harvard Massachusetts General Hospital Laser & Cosmetic Dermatology, Wellman Center for Photomedicine, Boston, Massachusetts, USA
| | | | - Yumeng Li
- Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Jill S Waibel
- Miami Dermatology & Laser Institute, Miami, Florida, USA
| |
Collapse
|
15
|
Santeerapharp A, Song SA, Woo P, Franco RA. Long-term outcomes of aminolevulinic acid photodynamic therapy for treatment of recalcitrant laryngeal premalignant lesions. Clin Otolaryngol 2021; 47:153-159. [PMID: 34662496 DOI: 10.1111/coa.13878] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 09/19/2021] [Accepted: 10/10/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To assess long-term outcomes of ALA-PDT in treating recalcitrant laryngeal leukoplakia. STUDY DESIGN Retrospective Case-Control. METHODS We reviewed all laryngeal leukoplakia patients treated with ALA-PDT compared with angiolytic laser treatment alone (585 nm PDL or 532 nm KTP laser) from 2000 to 2019. Patients with laryngeal cancer (or a history of laryngeal cancer), leukoplakia previously treated with radiation and no pathologic report were excluded. Patient demographics, procedure details and outcomes were examined including histopathologic diagnosis, procedures performed, ALA usage, recurrence of leukoplakia and the development of cancer. RESULTS We identified 132 patients with laryngeal leukoplakia: 42 were treated with ALA-PDT and 90 were treated with an angiolytic laser alone (Laser group). The proportion of cases of high-grade dysplasia was 57.1% in the ALA-PDT group compared to 32.2% in the Laser group. In high-grade dysplasia cases, there was a statistically significant better recurrence-free survival (RFS) at 12 months and 60 months in those who underwent ALA-PDT 71.4% and 7.1% vs Laser 25% and 0% (p = .01). However, for overall groups, there was no difference in RFS (p = .25). Voice outcomes (patient subjective report) improved or were stable in 75% of subjects with no serious side effects reported. CONCLUSION ALA-PDT for recalcitrant and high-grade dysplasia is highly effective with improved recurrence-free survival compared to laser alone. ALA-PDT may be an appropriate therapy in patients who have failed prior angiolytic laser alone.
Collapse
Affiliation(s)
- Alena Santeerapharp
- Department of Otorhinolaryngology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand.,Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts, USA
| | - Sungjin A Song
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts, USA.,Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
| | - Peak Woo
- Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Ramon A Franco
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts, USA.,Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
16
|
Kowalska M, Dębek W, Matuszczak E. Infantile Hemangiomas: An Update on Pathogenesis and Treatment. J Clin Med 2021; 10:jcm10204631. [PMID: 34682753 PMCID: PMC8539430 DOI: 10.3390/jcm10204631] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 09/09/2021] [Revised: 09/25/2021] [Accepted: 10/05/2021] [Indexed: 12/13/2022] Open
Abstract
Infantile hemangiomas are the most common benign vascular tumors in infancy. This review includes an update on the current knowledge on pathogenesis, a discussion on indications for treatment, and a review of the mechanisms underlying the different treatment methods. Although most infantile hemangiomas require only active observation because of their natural course, which results in involution, about 10% present with complications that require immediate treatment. The basic treatment includes systemic and topical options. In cases of insufficient response or rebound growth, other forms of treatment should be considered. In some cases, combined therapy might be initiated.
Collapse
|
17
|
Miyazaki T, Kurimoto R, Chiba T, Matsushima T, Nakamichi R, Tsutsumi H, Takada K, Yagasaki L, Kato T, Shishido K, Kobayashi Y, Matsumoto T, Moriyama K, Asahara H. Mkx regulates the orthodontic tooth movement via osteoclast induction. J Bone Miner Metab 2021; 39:780-786. [PMID: 33988755 DOI: 10.1007/s00774-021-01233-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 04/21/2021] [Indexed: 12/01/2022]
Abstract
INTRODUCTION The periodontal ligament (PDL) plays an important role in orthodontic tooth movement; however, the underlying molecular mechanism remains unclear. We have previously reported that the Mohawk homeobox (Mkx), a tendon-specific transcription factor, is expressed in the PDL and regulates its homeostasis. MATERIALS AND METHODS In the present study, we examined the role of Mkx in orthodontic tooth movement via bone remodeling induced by mechanical stimulation in Mkx-deficient rats, which are widely used as experimental animals for orthodontic force application. Orthodontic tooth movement of the maxillary first molar was performed in 7-week-old male Mkx-deficient rats (n = 4) and wild-type Wistar rats (n = 4) using coil springs for 14 days. Hematoxylin and eosin (H&E) staining and tartrate-resistant acid phosphatase (TRAP) staining were performed to evaluate morphological changes and osteoclasts. Furthermore, changes in the expression of receptor activator nuclear factor-kappa B ligand (RANKL) were demonstrated using immunostaining. RESULTS The amount of tooth movement was significantly lower in Mkx-deficient rats than in wild-type rats. The number of TRAP-positive cells was suppressed in Mkx-deficient rats on the compression side. CONCLUSION Orthodontic tooth movement experiments in Mkx-deficient rats suggested that Mkx is involved in osteoclast induction at the alveolar bone surface on the compression side. This study reveals the possibility that Mkx plays a mechanosensory role in orthodontic tooth movement by inducing RANKL expression and osteoclastogenesis.
Collapse
Affiliation(s)
- Takayuki Miyazaki
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, Japan
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Ryota Kurimoto
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Tomoki Chiba
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Takahide Matsushima
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Ryo Nakamichi
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Hiroki Tsutsumi
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Kaho Takada
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
- Department of Oral and Maxillofacilal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Lisa Yagasaki
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Tomomi Kato
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Kana Shishido
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan
| | - Yukiho Kobayashi
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Tsutomu Matsumoto
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, Japan.
| | - Hiroshi Asahara
- Department of Systems BioMedicine, Tokyo Medical and Dental University, 1-5-45Bunkyo-ku, YushimaTokyo, Japan.
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA.
| |
Collapse
|
18
|
Soliman M, Aal HA, Sadek AM, Tawfik AA. Pulsed-dye Laser Versus Intralesional Steroid in the Management of Nail Psoriasis: A Randomized, Intra-patient, Comparative, Controlled Study. J Clin Aesthet Dermatol 2021; 14:45-49. [PMID: 34980971 PMCID: PMC8675333] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Intralesional injection of corticosteroid (ILIS) and pulsed-dye laser (PDL) have been used in nail psoriasis treatment with variable outcomes. OBJECTIVE We sought to compare the efficacy of ILIS to PDL for the treatment of psoriatic fingernails using a dermoscope in the assessment and follow-up. METHODS This study included 30 patients with bilateral nail psoriasis. The fingernails of one hand were treated with PDL, whereas ILIS was used to treat the fingernails of the other hand. One psoriatic nail was left alone as a control. Every patient received four treatment sessions once every month. Efficacy was recorded clinically using the Nail Psoriasis Severity Index (NAPSI) and by a dermoscope before treatment (baseline) and at eight, 24, and 36 weeks after treatment. RESULTS The assessment by NAPSI revealed improvements of 22.24% and 24.11% occurred in the laser group and the intralesional steroid group, respectively. Also, the dermoscopic assessments revealed an improvement of 18.33% in the laser group versus that of 21.69% in the ILES. No significant difference was found between the two groups. CONCLUSION Both PDL and ILIS are considered safe treatments for nail psoriasis, yielding nearly equal results. The dermoscope is a reliable tool for the diagnosis and follow-up of nail psoriasis treatment.
Collapse
Affiliation(s)
- Mona Soliman
- All authors are with the Dermatology Unit, Medical Applications at the Laser National institute of Laser Enhanced Sciences, at Cairo University in Cairo , Egypt
- Ms. Aal is also with the Cairo Hospital for Dermatology and Venereology in Cairo, Egypt
| | - Hanaa Abdel Aal
- All authors are with the Dermatology Unit, Medical Applications at the Laser National institute of Laser Enhanced Sciences, at Cairo University in Cairo , Egypt
- Ms. Aal is also with the Cairo Hospital for Dermatology and Venereology in Cairo, Egypt
| | - Ahmed M Sadek
- All authors are with the Dermatology Unit, Medical Applications at the Laser National institute of Laser Enhanced Sciences, at Cairo University in Cairo , Egypt
- Ms. Aal is also with the Cairo Hospital for Dermatology and Venereology in Cairo, Egypt
| | - Abeer Attia Tawfik
- All authors are with the Dermatology Unit, Medical Applications at the Laser National institute of Laser Enhanced Sciences, at Cairo University in Cairo , Egypt
- Ms. Aal is also with the Cairo Hospital for Dermatology and Venereology in Cairo, Egypt
| |
Collapse
|
19
|
Schröder A, Stumpf J, Paddenberg E, Neubert P, Schatz V, Köstler J, Jantsch J, Deschner J, Proff P, Kirschneck C. Effects of mechanical strain on periodontal ligament fibroblasts in presence of Aggregatibacter actinomycetemcomitans lysate. BMC Oral Health 2021; 21:405. [PMID: 34407790 PMCID: PMC8371899 DOI: 10.1186/s12903-021-01761-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 08/04/2021] [Indexed: 01/30/2023] Open
Abstract
PURPOSE Many adult orthodontic patients suffer from periodontitis, which is caused by oral pathogens such as the gram-negative Aggregatibacter actinomycetemcomitans (Agac). Like orthodontic tooth movement, periodontitis is associated with inflammation and alveolar bone remodelling thereby affecting orthodontic treatment. Interactions of both processes, however, are not sufficiently explored, particularly with regard to oxidative stress. METHODS After preincubation with Agac lysate for 24 h periodontal ligament fibroblasts (PDLF) were either stretched or compressed for further 48 h simulating orthodontic forces in vitro. We analysed the expression of genes and proteins involved in the formation of reactive oxygen species (NOX-4, ROS) and nitric oxide (NOS-2), inflammation (TNF, IL-6, PTGS-2) and bone remodelling (OPG, RANKL). RESULTS Agac lysate elevated the expression of NOX-4, NOS-2, inflammatory IL-6 and PTGS-2 and the bone-remodelling RANKL/OPG ratio during compressive, but not tensile mechanical strain. Agac lysate stimulated pressure-induced inflammatory signalling, whereas surprisingly ROS formation was reduced. Pressure-induced downregulation of OPG expression was inhibited by Agac lysate. CONCLUSIONS Agac lysate impact on the expression of genes and proteins involved in inflammation and bone remodelling as well as ROS formation, when PDLF were subjected to mechanical forces occurring during orthodontic tooth movement.
Collapse
Affiliation(s)
- Agnes Schröder
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany.
| | - Julia Stumpf
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany
| | - Eva Paddenberg
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany
| | - Patrick Neubert
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Valentin Schatz
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Josef Köstler
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - James Deschner
- Department of Periodontology and Operative Medicine, University Medicine Mainz, 55131, Mainz, Germany
| | - Peter Proff
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany
| | | |
Collapse
|
20
|
Kimura-Nakajima C, Sakaguchi K, Hatano Y, Matsumoto M, Okazaki Y, Tanaka K, Yamane T, Oishi Y, Kamimoto K, Iwatsuki K. Ngn3-Positive Cells Arise from Pancreatic Duct Cells. Int J Mol Sci 2021; 22:8548. [PMID: 34445257 DOI: 10.3390/ijms22168548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 11/28/2022] Open
Abstract
The production of pancreatic β cells is the most challenging step for curing diabetes using next-generation treatments. Adult pancreatic endocrine cells are thought to be maintained by the self-duplication of differentiated cells, and pancreatic endocrine neogenesis can only be observed when the tissue is severely damaged. Experimentally, this can be performed using a method named partial duct ligation (PDL). As the success rate of PDL surgery is low because of difficulties in identifying the pancreatic duct, we previously proposed a method for fluorescently labeling the duct in live animals. Using this method, we performed PDL on neurogenin3 (Ngn3)-GFP transgenic mice to determine the origin of endocrine precursor cells and evaluate their potential to differentiate into multiple cell types. Ngn3-activated cells, which were marked with GFP, appeared after PDL operation. Because some GFP-positive cells were aligned proximally to the duct, we hypothesized that Ngn3-positive cells arise from the pancreatic duct. Therefore, we next developed an in vitro pancreatic duct culture system using Ngn3-GFP mice and examined whether Ngn3-positive cells emerge from this duct. We observed GFP expressions in ductal organoid cultures. GFP expressions were correlated with Ngn3 expressions and endocrine cell lineage markers. Interestingly, tuft cell markers were also correlated with GFP expressions. Our results demonstrate that in adult mice, Ngn3-positive endocrine precursor cells arise from the pancreatic ducts both in vivo and in vitro experiments indicating that the pancreatic duct could be a potential donor for therapeutic use.
Collapse
|
21
|
Chalazias A, Plemmenos G, Evangeliou E, Piperi C. Pivotal role of Transient Receptor Potential Channels in oral physiology. Curr Med Chem 2021; 29:1408-1425. [PMID: 34365940 DOI: 10.2174/0929867328666210806113132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/08/2021] [Accepted: 06/11/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Transient Receptor Potential (TRP) Channels constitute a large family of non-selective permeable ion channels involved in the perception of environmental stimuli with a central and continuously expanding role in oral tissue homeostasis. Recent studies indicate the regulatory role of TRPs in pulp physiology, oral mucosa sensation, dental pain nociception and salivary gland secretion. This review provides an update on the diverse functions of TRP channels in the physiology of oral cavity, with emphasis on their cellular location, the underlying molecular mechanisms and clinical significance. METHODS A structured search of bibliographic databases (PubMed and MEDLINE) was performed for peer reviewed studies on TRP channels function on oral cavity physiology the last ten years. A qualitative content analysis was performed in screened papers and a critical discussion of main findings is provided. RESULTS TRPs expression has been detected in major cell types of the oral cavity, including odontoblasts, periodontal ligament, oral epithelial, salivary gland cells, and chondrocytes of temporomandibular joints, where they mediate signal perception and transduction of mechanical, thermal, and osmotic stimuli. They contribute to pulp physiology through dentin formation, mineralization, and periodontal ligament formation along with alveolar bone remodeling in dental pulp and periodontal ligament cells. TRPs are also involved in oral mucosa sensation, dental pain nociception, saliva secretion, swallowing reflex and temporomandibular joints' development. CONCLUSION Various TRP channels regulate oral cavity homeostasis, playing an important role in the transduction of external stimuli to intracellular signals in a cell type-specific manner and presenting promising drug targets for the development of pharmacological strategies to manage oral diseases.
Collapse
Affiliation(s)
- Andreas Chalazias
- School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, Goudi, 115 27 Athens. Greece
| | - Grigorios Plemmenos
- School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, Goudi, 115 27 Athens. Greece
| | - Evangelos Evangeliou
- School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, Goudi, 115 27 Athens. Greece
| | - Christina Piperi
- School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, Goudi, 115 27 Athens. Greece
| |
Collapse
|
22
|
Sanchez-Martos M, Martinez-Navarrete G, Bernabeu-Zornoza A, Humphreys L, Fernandez E. Evaluation and Optimization of Poly-d-Lysine as a Non-Natural Cationic Polypeptide for Gene Transfer in Neuroblastoma Cells. Nanomaterials (Basel) 2021; 11:nano11071756. [PMID: 34361142 PMCID: PMC8308159 DOI: 10.3390/nano11071756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 06/26/2021] [Accepted: 06/29/2021] [Indexed: 11/17/2022]
Abstract
Cationic polypeptides and cationic polymers have cell-penetrating capacities and have been used in gene transfer studies. In this study, we investigate the capability of a polymer of d-lysine (PDL), a chiral form of α–Poly-lysine, as a possible nonviral vector for releasing genetic materials to neuroblastoma cells and evaluate its stability against proteases. We tested and compared its transfection effectiveness in vitro as a vehicle for the EGFP plasmid DNA (pDNA) reporter in the SH-SY5Y human neuroblastoma, HeLa, and 3T3 cell lines. Using fluorescent microscopy and flow cytometry, we demonstrated high transfection efficiencies based on EGFP fluorescence in SH-SY5Y cells, compared with HeLa and 3T3. Our results reveal PDL as an efficient vector for gene delivery specifically in the SH-SY5Y cell line and suggest that PDL can be used as a synthetic cell-penetrating polypeptide for gene therapy in neuroblastoma cells.
Collapse
Affiliation(s)
- Miguel Sanchez-Martos
- Neuroprothesis and Neuroengineering Research Group, Miguel Hernández University, 03201 Elche, Spain; (M.S.-M.); (G.M.-N.); (A.B.-Z.); (L.H.)
| | - Gema Martinez-Navarrete
- Neuroprothesis and Neuroengineering Research Group, Miguel Hernández University, 03201 Elche, Spain; (M.S.-M.); (G.M.-N.); (A.B.-Z.); (L.H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Adela Bernabeu-Zornoza
- Neuroprothesis and Neuroengineering Research Group, Miguel Hernández University, 03201 Elche, Spain; (M.S.-M.); (G.M.-N.); (A.B.-Z.); (L.H.)
| | - Lawrence Humphreys
- Neuroprothesis and Neuroengineering Research Group, Miguel Hernández University, 03201 Elche, Spain; (M.S.-M.); (G.M.-N.); (A.B.-Z.); (L.H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Eduardo Fernandez
- Neuroprothesis and Neuroengineering Research Group, Miguel Hernández University, 03201 Elche, Spain; (M.S.-M.); (G.M.-N.); (A.B.-Z.); (L.H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-965222001
| |
Collapse
|
23
|
Lee SY, Moon JS, Yang DW, Yoo HI, Jung JY, Kim OS, Kim MS, Koh JT, Chung HJ, Kim SH. SLPI in periodontal Ligament is not sleepy during biophysical force-induced tooth movement. J Clin Periodontol 2021; 48:528-540. [PMID: 33370451 DOI: 10.1111/jcpe.13416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/09/2020] [Accepted: 12/23/2020] [Indexed: 12/14/2022]
Abstract
AIM We aimed to identify a key molecule that maintains periodontal tissue homeostasis during biophysical force-induced tooth movement (BTM) by orchestrating alveolar bone (AB) remodelling. MATERIALS AND METHODS Differential display-PCR was performed to identify key molecules for BTM in rats. To investigate the localization and expression of the identified molecules, immunofluorescence, real-time RT-PCR and Western blotting were performed in rats and human periodontal ligament (PDL) cells. Functional test and micro-CT analysis were performed to examine the in vivo effects of the identified molecules on BTM. RESULTS Secretory leucocyte peptidase inhibitor (SLPI) in the PDL was revealed as a key molecule for BTM-induced AB remodelling. SLPI was enhanced in the PDL under both compression and tension, and downregulated by an adenyl cyclases inhibitor. SLPI induced osteoblastogenic genes including runt-related transcription factor 2 (Runx2) and synergistically augmented tension-induced Runx2 expression. SLPI augmented mineralization in PDL cells. SLPI induced osteoclastogenic genes including receptor activator of nuclear factor kappa-Β ligand (RANKL) and synergistically augmented the compression-induced RANKL and macrophage colony-stimulating factor (MCSF) expression. Finally, the in vivo SLPI application into the AB significantly augmented BTM. CONCLUSIONS SLPI or its inhibitors might serve as a biological target molecule for therapeutic interventions to modulate BTM.
Collapse
Affiliation(s)
- Su-Young Lee
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jung-Sun Moon
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Dong-Wook Yang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Hong-Il Yoo
- Department of Anatomy and Neuroscience, College of Medicine, Eulji University, Daejeon, Korea
| | - Ji-Yeon Jung
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Min-Seok Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jeong-Tae Koh
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Hyun-Ju Chung
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| |
Collapse
|
24
|
Powell E, Markus R, Malone CH. Generalized essential telangiectasia treated with PDL. J Cosmet Dermatol 2021; 20:1086-1087. [PMID: 33405306 DOI: 10.1111/jocd.13938] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 12/30/2020] [Indexed: 11/26/2022]
Abstract
Generalized essential telangiectasia (GET) is a rare, clinically benign condition but a source of cosmetic concern for affected patients. There is a dearth of publications and known treatment options for GET. This case report reviews the clinical course of a 54-year-old woman who presented with a long-standing history of telangiectatic patches on her dorsal feet and ankles with progressive spread to the lower extremities consistent with GET. The patient proceeded with two pulsed dye laser (PDL) treatments and had complete resolution of her skin findings maintained at her 1.5-year follow-up appointment.
Collapse
Affiliation(s)
- Emily Powell
- Department of Dermatology, Baylor College of Medicine, Houston, TX, USA
| | | | - Cedar H Malone
- Department of Dermatology, Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
25
|
Quast A, Martian V, Bohnsack A, Batschkus S, Meyer-Marcotty P, Miosge N. Donor variation and sex hormone receptors in periodontal ligament cells. Arch Oral Biol 2020; 122:105026. [PMID: 33348207 DOI: 10.1016/j.archoralbio.2020.105026] [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: 07/31/2020] [Revised: 10/21/2020] [Accepted: 11/28/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE This study evaluated the gene expression and protein synthesis of sex hormone receptors in human periodontal ligament cells (PDLCs) in relation to donor- and tooth-specific factors with the aim to clarify the debate about sex hormone receptors in PDLCs. DESIGN The expression patterns of estrogen receptors (genes: ESR1 and ESR2; proteins: ERα and ERβ), androgen receptor (AR) and progesterone receptor (PR) were investigated in the context of immortalization status, previous orthodontic tooth movement (OTM), donor age, sex and hormonal stimulation in PDLCs from 14 healthy donors (male: n = 8, female: n = 6; adolescents: n = 8, adults: n = 6) using quantitative real-time polymerase chain reaction, Western blot and immunocytochemistry. RESULTS For ERβ, the full-length isoform ERβ1 and truncated variants were detected. For ERα, the expected isoform ERα66 was not observed, but a novel isoform ERα36 was detected. Immortalization status, previous OTM and donor age had no impact on ESR1 and ESR2 expression. Estradiol stimulation for 24 h doubled the ratio of ESR2/ESR1 in PDLCs from female but not male donors, indicating sex-specific patterns of receptor expression. AR and PR demonstrated insufficient protein synthesis in PDLCs. CONCLUSIONS The data revealed a pivotal role for and complex interplay between ERα and ERβ in human PDLCs regardless of variable donor characteristics. Therefore, PDLC biology might be altered in patients of each age group and both sexes due to hormonal changes. This should be kept in mind during periodontic and orthodontic treatment of patients with special hormonal status.
Collapse
Affiliation(s)
- Anja Quast
- Department of Orthodontics, University Medical Center, Goettingen, Germany.
| | - Viktor Martian
- Tissue Regeneration Group, Department of Orthodontics, University Medical Center, Goettingen, Germany
| | - Annegret Bohnsack
- Department of Orthodontics, University Medical Center, Goettingen, Germany
| | - Sarah Batschkus
- Department of Orthodontics, University Medical Center, Goettingen, Germany
| | | | - Nicolai Miosge
- Tissue Regeneration Group, Department of Orthodontics, University Medical Center, Goettingen, Germany
| |
Collapse
|
26
|
Karimi A, Razaghi R, Biglari H, Rahmati SM, Sandbothe A, Hasani M. Finite element modeling of the periodontal ligament under a realistic kinetic loading of the jaw system. Saudi Dent J 2019; 32:349-356. [PMID: 33132663 PMCID: PMC7588630 DOI: 10.1016/j.sdentj.2019.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 07/13/2019] [Revised: 09/29/2019] [Accepted: 10/20/2019] [Indexed: 11/25/2022] Open
Abstract
Purpose The stresses and deformations in the periodontal ligament (PDL) under the realistic kinetic loading of the jaw system, i.e., chewing, are difficult to be determined numerically as the mechanical properties of the PDL is variably present in different finite element (FE) models. This study was aimed to conduct a dynamic finite element (FE) simulation to investigate the role of the PDL (PDL) material models in the induced stresses and deformations using a simplified patient-specific FE model of a human jaw system. Methods To do that, a realistic kinetic loading of chewing was applied to the incisor point, contralateral, and ipsilateral condyles, through the experimentally proven trajectory approach. Three different material models, including the elasto-plastic, hyperelastic, and viscoelastic, were assigned to the PDL, and the resulted stresses of the tooth FE model were computed and compared. Results The results revealed the highest von Mises stress of 620.14 kPa and the lowest deformation of 0.16 mm in the PDL when using the hyperelastic model. The concentration of the stress in the elastoplastic and viscoelastic models was in the mid-root and apex of the PDL, while for the hyperelastic model, it was concentrated in the cervical margin. The highest deformation in the PDL regardless of the employed material model was located in the caudal direction of the tooth. The viscoelastic PDL absorbed the transmitted energy from the dentine and led to lower stress in the cancellous bone compared to the elastoplastic and hyperelastic material models. Conclusion These results have implications not only for understanding the stresses and deformations in the PDL under chewing but also for providing comprehensive information for the medical and biomechanical experts in regard of the role of the material models being used to address the mechanical behavior of the PDL in other components of the tooth.
Collapse
Affiliation(s)
- Alireza Karimi
- Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Reza Razaghi
- Department of Mechanical Engineering, University of Tabriz, Tabriz 51666, Iran.,Basir Eye Health Research Center, Tehran, Iran
| | - Hasan Biglari
- Department of Mechanical Engineering, University of Tabriz, Tabriz 51666, Iran
| | | | - Alix Sandbothe
- Children's Hospital & Medical Center, Omaha, NE, United States
| | - Mojtaba Hasani
- Department of Biomedical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran
| |
Collapse
|
27
|
Schröder A, Küchler EC, Omori M, Spanier G, Proff P, Kirschneck C. Effects of ethanol on human periodontal ligament fibroblasts subjected to static compressive force. Alcohol 2019; 77:59-70. [PMID: 30336201 DOI: 10.1016/j.alcohol.2018.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [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: 04/27/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 11/29/2022]
Abstract
Consumption of toxic substances such as alcohol is widespread in the general population and thus also in patients receiving orthodontic treatment. Since human periodontal ligament (hPDL) fibroblasts play a key role in orthodontic tooth movement (OTM) by expressing cytokines and chemokines, we wanted to clarify whether ethanol modulates the physiological activity and expression pattern of hPDL fibroblasts during static compressive force application. We pre-incubated hPDL fibroblasts for 24 h with different ethanol concentrations, corresponding to casual (0.041% blood alcohol concentration [BAC], % by volume) and excessive (0.179%) alcohol consumption. At each ethanol concentration, we incubated the cells for another 48 h with and without an additional physiological compressive force of 2 g/cm2 occurring during orthodontic tooth movement in compression areas of the periodontal ligament. Thereafter, we analyzed expression and secretion of genes and proteins involved in OTM regulation by RT-qPCR and ELISA. We also performed co-culture experiments to observe hPDL-fibroblast-mediated osteoclastogenesis. We observed no effects of ethanol on cytotoxicity or cell viability of hPDL fibroblasts in the applied concentrations. Ethanol showed an enhancing effect on angiogenesis and activity of alkaline phosphatase. Simultaneously, ethanol reduced the induction of IL-6 and increased prostaglandin E2 synthesis as well as hPDL-fibroblast-mediated osteoclastogenesis without affecting the RANK-L/OPG-system. hPDL fibroblasts thus seem to be a cell type quite resistant to ethanol, as no cytotoxic effects or influence on cell viability were detected. High ethanol concentrations, however, seem to promote bone formation and angiogenesis. Ethanol at 0.179% also enhanced hPDL-induced osteoclastogenesis, indicating increased bone resorption and thus tooth movement velocity to be expected during orthodontic therapy.
Collapse
Affiliation(s)
- Agnes Schröder
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany.
| | | | - Marjorie Omori
- School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil
| | - Gerrit Spanier
- Department of Cranio-Maxillo-Facial Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Peter Proff
- Department of Orthodontics, University Hospital Regensburg, Regensburg, Germany
| | | |
Collapse
|
28
|
Periyasamy MK, Sekar CS, Rai R. Effectiveness of Dual Sequential Wavelength Laser in the Treatment of Portwine Stains - A Retrospective Study. Indian Dermatol Online J 2019; 10:418-421. [PMID: 31334061 PMCID: PMC6615402 DOI: 10.4103/idoj.idoj_483_18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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] [Indexed: 11/04/2022] Open
Abstract
Background Port Wine Stain (PWS) is only partially and superficially treated with the Pulsed dye laser (PDL) because of its limited depth of penetration. The 1064-nm long pulsed Nd:YAG laser has greater depth of penetration and is used to treat deeper vessels. The dual sequential wavelength laser (DSWL) which combines PDL/Nd:YAG (595/1064 nm) can be more effective for the treatment of deeper, nodular portwine stains due to its synergistic effect. The purpose of this study is to evaluate the efficacy and safety of DSWL in the treatment of portwine stains after five treatment sessions. Materials and Methods A total of 11 patients with PWS lesions on the head and neck, who were treated with DSWL for at least five sittings at monthly interval were included in this study. The assessment of the therapeutic response and grading of improvement was done with a scale of 0 to 4 by comparing the photographs taken before treatment and after 5 sittings of laser treatment. Results Out of the 11 patients, 5 patients (45.45%) had more than 70% improvement. Six out of eleven patients (54.54%) had 40 to 70% improvement at the end of five sittings with no adverse effects including purpura. Conclusion Dual Sequential Wavelength Laser is a good modality of treatment for portwine stains. It has enhanced penetration and effective clearance of thicker, nodular, recalcitrant lesions of PWS. DSWL is safe and efficacious and it can be recommended as a therapeutic modality for portwine stains.
Collapse
Affiliation(s)
| | - C Shanmuga Sekar
- Department of Dermatology, PSG Hospitals, Coimbatore, Tamil Nadu, India
| | - Reena Rai
- Department of Dermatology, PSG Hospitals, Coimbatore, Tamil Nadu, India
| |
Collapse
|
29
|
Shi C, Zhu J, Yang D. The pivotal role of inflammation in scar/keloid formation after acne. Dermatoendocrinol 2018; 9:e1448327. [PMID: 29707102 PMCID: PMC5914537 DOI: 10.1080/19381980.2018.1448327] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 02/13/2018] [Accepted: 02/26/2018] [Indexed: 11/15/2022]
Abstract
Most keloids are clinically observed as solid nodules or claw-like extensions. However, they appear hypoechoic on ultrasound images and are therefore easily confused with liquid features such as blood or vessels. The pathological manifestations of typical keloids also include prominent, thick blood vessels. The existing classification of scars fails to reflect the natural history of keloids. The outer characteristics of a typical keloid include bright red hyperplasia with abundant vessels, suggesting the importance of vascular components in the process of scar formation and prompting consideration of the role of inflammation in the development of granular hyperplasia. Additionally, we further considered the potential effectiveness of oral isotretinoin for severe keloids secondary to severe acne. We also explored different principles and applications related to 5-fluorouracil (5-FU), pulsed dye laser (PDL), and CO2 laser treatments for scars.
Collapse
Affiliation(s)
- Chao Shi
- Shanghai Dermatology Hospital, No.1278 Baode Road, Jing An District, Shanghai, China
| | - Jianyu Zhu
- Shanghai Dermatology Hospital, No.1278 Baode Road, Jing An District, Shanghai, China
| | - Degang Yang
- Shanghai Dermatology Hospital, No.1278 Baode Road, Jing An District, Shanghai, China
| |
Collapse
|
30
|
Namburi M, Nagothu S, Kumar CS, Chakrapani N, Hanumantharao CH, Kumar SK. Evaluating the effects of consolidation on intrusion and retraction using temporary anchorage devices-a FEM study. Prog Orthod 2017; 18:2. [PMID: 28066875 PMCID: PMC5219976 DOI: 10.1186/s40510-016-0155-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 11/14/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Extraction of premolars and retracting the anterior teeth using mini-implants and anterior retraction hooks became advent now a day. In such treatments, consolidation of arches is not done in regular practice. So, the present study is concentrated on effects of consolidation in two implant and three implant combinations of retraction and intrusion. METHODS A three-dimensional FEM model of maxillary teeth and periodontal ligament housed in the alveolar bone with the first premolars extracted is generated with appropriate number of elements and nodes. The models were broadly divided into two groups according to the no. of implants. Mini-implants were placed bilaterally between the second premolar and molar at varying heights (7, 10, 13 mm) in group I, and along with bilateral implants, an additional mid-implant is placed between the central incisors as group II. Brackets with 0.022 slot were placed on the teeth, 19 × 25 SS wire is placed in the brackets, an anterior retraction hook was placed at 9 mm height, and analysis was done to evaluate the stresses and displacement patterns in consolidation and non-consolidation models. RESULTS The results showed that consolidation of the anterior teeth during intrusion and retraction shows various advantages such as less stresses on the bone, PDL, implant, teeth, and no labial flaring of the anterior teeth and three implant system, i.e., two bilateral implant at 10 mm and a mid-implant at 12 mm between the centrals has shown to be better than other models as bodily movement is observed. CONCLUSION Consolidation is better than non consolidation during enmasse retraction and intrusion.
Collapse
Affiliation(s)
- Monica Namburi
- St. Joseph Dental College, Eluru, Andhra Pradesh, India.
| | | | | | - N Chakrapani
- St. Joseph Dental College, Eluru, Andhra Pradesh, India
| | | | | |
Collapse
|
31
|
Minch LE, Sarul M, Nowak R, Kawala B, Antoszewska-Smith J. Orthodontic intrusion of periodontally-compromised maxillary incisors: 3-dimensional finite element method analysis. ADV CLIN EXP MED 2017; 26:829-833. [PMID: 29068580 DOI: 10.17219/acem/61349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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] [Indexed: 11/24/2022]
Abstract
BACKGROUND Loading of the compromised periodontium with orthodontic forces produces different results than those achieved in patients with healthy periodontal support. Determining the force value at a level preventing further deterioration of the patient's periodontal status, thus delivering the most precisely individualized "dose" of loading, seems to be crucial for the successful intrusion of teeth with reduced periodontal support. OBJECTIVES The aim of the study was to determine the range of force values efficiently intruding maxillary incisors without further compromising the initially-impaired periodontal status. Finite element analysis (FEA), allowing estimation of the stress and strain distribution, was the method of choice. MATERIAL AND METHODS The CT scans of a periodontally-compromised patient were segmented using InVesalius software. A model - based on NURBS surfaces - was adjusted to the CT scans in order to obtain both smooth and natural curvatures of each model segment. All relevant tissues were modeled as separate volumes. The geometric model was discretized in order to create a numerical model for applying Ansys software (v. 15.07) and using APDL. The central incisors were loaded with external intrusive forces, ranging from 0.1 to 0.4 N. RESULTS The simulation, performed iteratively, showed that even the lowest force value - 0.1 N - causes stress changes in the alveolus and on the root surfaces, with a tendency of stress increasing towards the bottom of the alveolus and root apex. It is also notable that during the application of forces of equal magnitude, the stress/strain distribution was significantly higher around tooth 21, which displayed the highest range of PDL reduction. Application of the same force level created a higher stress-strain response around tooth 21, and the characteristics were less homogenous. CONCLUSIONS A force value of 0.1 N applied in vivo might produce the most effective tooth intrusion and bone modeling which favors bone defect regeneration.
Collapse
Affiliation(s)
- Liwia E Minch
- Department of Dentofacial Orthopedics and Orthodontics, Wroclaw Medical University, Poland
| | - Michał Sarul
- Department of Dentofacial Orthopedics and Orthodontics, Wroclaw Medical University, Poland
| | - Rafał Nowak
- Department of Maxillofacial Surgery, Wroclaw Medical University, Poland
| | - Beata Kawala
- Department of Dentofacial Orthopedics and Orthodontics, Wroclaw Medical University, Poland
| | | |
Collapse
|
32
|
Lee Y, Kim W. Combination laser treatment for immediate post-surgical scars: a retrospective analysis of 33 immature scars. Lasers Med Sci 2017; 32:1111-9. [PMID: 28466198 DOI: 10.1007/s10103-017-2215-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 04/19/2017] [Indexed: 10/19/2022]
Abstract
The application of laser treatments beginning on the day of stitch removal has been demonstrated to improve scar quality. However, there are few guidelines for the treatment of immature scars (ISs), which are defined as "scars whose features are not yet expressed." The purpose of this study was to extract information about early combination laser treatment (CLT) beyond what is currently known by analyzing 33 pairs of pre-treatment and post-treatment photographs of ISs. Two hundred fifty medical records of patients with scars were reviewed, and 33 scars were included in the study. The included scars were treated with vascular lasers (585 or 532 nm) followed by 1550-nm fractional lasers from May 2014 to July 2015 (fewer than 52 days after stitch removal, Fitzpatrick's skin types III-IV, mean age = 16.0 years). Blinded evaluators (one plastic surgeon and two dermatologists) evaluated the pre-treatment and post-treatment photographs. The pre-treatment photographs were scored on a spectrum from "0," when no difference with the surrounding unaffected skin was observed, to "100," when the worst scarring was present. The pre-treatment and post-treatment photographs were compared, and the results were graded on a spectrum from 0, when no difference between the pre-treatment and post-treatment photographs was observed, to 100, when no difference was observed between the post-treatment skin and the surrounding unaffected skin. Statistical analyses were performed with PASW 17.0, SPSS Korea, Seoul, Korea (p < 0.05). The improvement scores (ImS) and weighted scores (Wtd: i.e., weighted according to the pre-treatment scores) were used as dependent variables. The average improvement score was 87.98 (median = 90). Seventeen cases were scored as 100-point improvements. The facial and non-facial scars exhibited differences in the ImS and Wtd scores. The Wtd scores were negatively correlated with the temporal gap (in days) between stitch removal and the beginning of CLT. No significant difference in the Wtd scores was demonstrated between the two vascular laser groups. Patient age and Wtd score were negatively correlated, and a significant difference was observed in the Wtd scores between the age groups (≥15 and <15 years old). CLT for ISs results in excellent outcomes. Better results are achieved with earlier CLT initiation following stitch removal. Better outcomes can be expected for younger patients and for facial scars. We found that 532 and 585-nm lasers are equally effective for CLT of ISs.
Collapse
|
33
|
Uhlir R, Mayo V, Lin PH, Chen S, Lee YT, Hershey G, Lin FC, Ko CC. Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement. Angle Orthod 2016; 87:183-192. [PMID: 27542105 DOI: 10.2319/092615-651.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To quantify the biomechanical properties of the bovine periodontal ligament (PDL) in postmortem sections and to apply these properties to study orthodontic tooth intrusion using finite element analysis (FEA). We hypothesized that PDL's property inherited heterogeneous (anatomical dependency) and nonlinear stress-strain behavior that could aid FEA to delineate force vectors with various rectangular archwires. MATERIALS AND METHODS A dynamic mechanical analyzer was used to quantify the stress-strain behavior of bovine PDL. Uniaxial tension tests using three force levels (0.5, 1, and 3 N) and samples from two anatomical locations (circumferential and longitudinal) were performed to calculate modulus. The Mooney-Rivlin hyperelastic (MRH) model was applied to the experimental data and used in an FEA of orthodontic intrusion rebounded via a 0.45-mm step bend with three archwire configurations of two materials (stainless steel and TMA). RESULTS Force levels and anatomical location were statistically significant in their effects on modulus (P < .05). The apical part had a greater stiffness than did the middle part. The MRH model was found to approximate the experimental data well (r = 0.99), and it demonstrated a reasonable stress-strain outcome within the PDL and bone for FEA intrusion simulation. The force acting on the tooth increased five times from the 0.016 × 0.022-inch TMA to the 0.019 × 0.025-inch stainless steel. CONCLUSIONS The PDL is a nonhomogeneous tissue in which the modulus changed in relation to location. PDL nonlinear constitutive model estimated quantitative force vectors for the first time to compare intrusive tooth movement in 3-D space in response to various rectangular archwires.
Collapse
|
34
|
Mlacker S, Shah VV, Aldahan AS, McNamara CA, Kamath P, Nouri K. Laser and light-based treatments of venous lakes: a literature review. Lasers Med Sci 2016; 31:1511-9. [PMID: 27056704 DOI: 10.1007/s10103-016-1934-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 02/12/2016] [Accepted: 03/28/2016] [Indexed: 12/19/2022]
Abstract
Venous lake is a benign vascular malformation commonly seen in elderly patients, typically arising in sun-exposed areas of the body. Patients often seek treatment to prevent recurrent bleeding or because they find the lesion cosmetically unacceptable. Venous lake may negatively affect quality of life, due to the cosmetic disfigurement it can create and the resulting psychological distress. Traditional treatments, such as surgical excision, cryosurgery, sclerotherapy, and electrocoagulation, result in varying degrees of success and can cause discomfort. Laser- and light-based treatment modalities may offer a safe and effective alternative, as numerous studies have shown their benefit in the treatment of venous lakes, particularly with the long-pulsed 1064-nm neodymium-doped yttrium aluminum garnet (Nd:YAG). Although various types of lasers and lights have been studied, there remains a lack of general consensus as to which one is the superior laser modality. Further studies that establish standardized protocols to compare the results of using different types of laser treatments are warranted.
Collapse
Affiliation(s)
- Stephanie Mlacker
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA.
| | - Vidhi V Shah
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA
| | - Adam S Aldahan
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA
| | - Colin A McNamara
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA
| | - Preetha Kamath
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA
| | - Keyvan Nouri
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 1475 NW 12th Avenue, Suite 2175, Miami, FL, 33136, USA
| |
Collapse
|
35
|
Sanchez-Mendoza EH, Schlechter J, Hermann DM, Doeppner TR. Characterization of Seeding Conditions for Studies on Differentiation Patterns of Subventricular Zone Derived Neurospheres. Front Cell Neurosci 2016; 10:55. [PMID: 27013970 PMCID: PMC4779939 DOI: 10.3389/fncel.2016.00055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 07/28/2015] [Accepted: 02/22/2016] [Indexed: 11/13/2022] Open
Abstract
Stem cell research depends on extensive in vitro research. Poly-D-lysine (PDL) and polyornithine (PornT) are chemically synthesized amino acid chains promoting cell adhesion to solid substrates. Although, PDL and PornT are extensively used, there is no common agreement regarding the most optimal substance and its concentration. We therefore aimed at testing the effect of increasing concentrations (10, 50, and 100 μg/ml) for each compound and their corresponding mixtures (5+5 and 10+10 μg/ml) on the differentiation patterns of subventricular zone derived neurospheres. The latter were cultured for 24 h for protein and morphological analysis or for 8 h for migration analysis. No significant differences were found between increasing concentrations of PDL and PornT alone and the 10+10 condition in Western blots and immunocytochemistry. However, the mixed condition of 5+5 showed decreased glial fibrillary acidic protein and nestin expression with no changes in Akt, pAkt, GSK-3-beta, and pGSK-3-beta expression patterns. The various coating conditions also had no influence on migration of cells emerging from the neurosphere. Nevertheless, stimulation with recombinant human Erythropoietin (rhEpo) reduced migration by 20% regardless of the coating condition. We therefore conclude that a minimal concentration of 10 μg/ml of either compound should be used to produce reliable results with no alterations in protein levels as found for the 5+5 groups, and that the coating has no effect on the response of cells to chemical interventions. As such, a concentration of 10 μg/ml for either substance is sufficient when studying cellular processes of neurospheres in an in vitro or ex vivo environment.
Collapse
Affiliation(s)
| | - Jana Schlechter
- Department of Neurology, Essen Medical School, University of Duisburg-Essen Essen, Germany
| | - Dirk M Hermann
- Department of Neurology, Essen Medical School, University of Duisburg-Essen Essen, Germany
| | - Thorsten R Doeppner
- Department of Neurology, Essen Medical School, University of Duisburg-EssenEssen, Germany; Department of Neurology, Medical School, University of GöttingenGöttingen, Germany
| |
Collapse
|
36
|
Ren Y, Han X, Jing Y, Yuan B, Ke H, Liu M, Feng JQ. Sclerostin antibody (Scl-Ab) improves osteomalacia phenotype in dentin matrix protein 1(Dmp1) knockout mice with little impact on serum levels of phosphorus and FGF23. Matrix Biol 2015; 52-54:151-161. [PMID: 26721590 DOI: 10.1016/j.matbio.2015.12.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 02/05/2023]
Abstract
Unlike treatments for most rickets, the treatment using 1,25-(OH)2 vitamin D3 has little efficacy on patients with hypophosphatemic rickets, a set of rare genetic diseases. Thus, understanding the local cause for osteomalacia in hypophosphatemic rickets and developing an effective treatment to restore mineralization in this rare disease has been a longstanding goal in medicine. Here, we used Dmp1 knockout (KO) mice (whose mutations led to the same type of autosomal recessive hypophosphatemic rickets in humans) as the model in which the monoclonal antibody of sclerostin (Scl-Ab) was tested in two age groups for 8weeks: the prevention group (starting at age 4weeks) and the treatment group (starting at age 12weeks). Applications of Scl-Ab greatly improved the osteomalacia phenotype (>15%) and the biomechanical properties (3-point bending, ~60%) in the treated long-bone group. Our studies not only showed improvement of the osteomalacia in the alveolar bone, which has the highest bone metabolism rate, as well as the long bone phenotypes in treated mice. All these improvements attributed to the use of Scl-Ab are independent of the change in serum levels of phosphorus and FGF23, since Scl-Ab had little efficacy on those parameters. Finally, we propose a model to explain how Scl-Ab can improve the Dmp1 KO osteomalacia phenotype, in which the sclerostin level is already low.
Collapse
Affiliation(s)
- Yinshi Ren
- Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, TX, USA
| | - Xianglong Han
- Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, TX, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, China
| | - Yan Jing
- Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, TX, USA
| | - Baozhi Yuan
- Department of Medicine, University of Wisconsin-Madison and Geriatric Research and Education Center, Madison, WI, USA
| | - Huazhu Ke
- Department of Metabolic Disorders, Amgen Inc., Thousand Oaks, CA, USA
| | - Min Liu
- Department of Metabolic Disorders, Amgen Inc., Thousand Oaks, CA, USA
| | - Jian Q Feng
- Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, TX, USA.
| |
Collapse
|
37
|
Memmert S, Gölz L, Pütz P, Jäger A, Deschner J, Appel T, Baumgarten G, Rath-Deschner B, Frede S, Götz W. Regulation of p53 under hypoxic and inflammatory conditions in periodontium. Clin Oral Investig 2015; 20:1781-9. [PMID: 26620730 DOI: 10.1007/s00784-015-1679-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 11/22/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVES Different studies suggest that inflammation as well as hypoxia leads to an increase of p53 protein levels. However, the implication of p53 during oral inflammatory processes is still unknown. The aim of this study was therefore to investigate the effect of hypoxia and inflammation on p53 regulation in human periodontium in vitro and in vivo. MATERIALS AND METHODS Under hypoxic and normoxic conditions, human primary periodontal ligament (PDL) fibroblasts (n = 9) were stimulated with lipopolysaccharides (LPS) from Porphyromonas gingivalis (P.g.), a periodontal pathogenic bacterium. After different time points, cell viability was tested; p53 gene expression, protein synthesis, and activation were measured using quantitative RT-PCR, immunoblotting, and immunofluorescence. Moreover, healthy and inflamed periodontal tissues were obtained from 12 donors to analyze p53 protein in oral inflammatory diseases by immunohistochemistry. RESULTS LPS-P.g. and hypoxia initially induced a significant upregulation of p53 mRNA expression and p53 protein levels. Nuclear translocation of p53 after inflammatory stimulation supported these findings. Hypoxia first enhanced p53 levels, but after 24 h of incubation, protein levels decreased, which was accompanied by an improvement of PDL cell viability. Immunohistochemistry revealed an elevation of p53 immunoreactivity in accordance to the progression of periodontal inflammation. CONCLUSIONS Our data indicate that p53 plays a pivotal role in PDL cell homeostasis and seems to be upregulated in oral inflammatory diseases. CLINICAL RELEVANCE Upregulation of p53 may promote the destruction of periodontal integrity. A possible relationship with carcinogenesis may be discussed.
Collapse
Affiliation(s)
- S Memmert
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany. .,Section of Experimental Dento-Maxillo-Facial Medicine, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Bonn, Germany.
| | - L Gölz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany
| | - P Pütz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany
| | - A Jäger
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany
| | - J Deschner
- Section of Experimental Dento-Maxillo-Facial Medicine, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Bonn, Germany
| | - T Appel
- Clinic of Oral and Maxillofacial Surgery, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Bonn, Germany
| | - G Baumgarten
- Clinic and Polyclinic of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, University of Bonn, Bonn, Germany
| | - B Rath-Deschner
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany
| | - S Frede
- Clinic and Polyclinic of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, University of Bonn, Bonn, Germany
| | - W Götz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, Faculty of Medicine, University of Bonn, Welschnonnenstr 17, 53111, Bonn, Germany
| |
Collapse
|
38
|
Ren Y, Han X, Ho SP, Harris SE, Cao Z, Economides AN, Qin C, Ke H, Liu M, Feng JQ. Removal of SOST or blocking its product sclerostin rescues defects in the periodontitis mouse model. FASEB J 2015; 29:2702-11. [PMID: 25757567 DOI: 10.1096/fj.14-265496] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/19/2015] [Indexed: 02/05/2023]
Abstract
Understanding periodontal ligament (PDL) biology and developing an effective treatment for bone and PDL damage due to periodontitis have been long-standing aims in dental medicine. Here, we first demonstrated by cell lineage tracing and mineral double-labeling approaches that murine PDL progenitor cells display a 2- and 3-fold higher mineral deposition rate than the periosteum and endosteum at the age of 4 weeks, respectively. We next proved that the pathologic changes in osteocytes (Ocys; changes from a spindle shape to round shape with a >50% reduction in the dendrite number/length, and an increase in SOST) are the key pathologic factors responsible for bone and PDL damage in periostin-null mice (a periodontitis animal model) using a newly developed 3-dimensional FITC-Imaris technique. Importantly, we proved that deleting the Sost gene (a potent inhibitor of WNT signaling) or blocking sclerostin function by using the mAb in this periodontitis model significantly restores bone and PDL defects (n = 4-5; P < 0.05). Together, identification of the key contribution of the PDL in normal alveolar bone formation, the pathologic changes of the Ocys in periodontitis bone loss, and the novel link between sclerostin and Wnt signaling in the PDL will aid future drug development in the treatment of patients with periodontitis.
Collapse
Affiliation(s)
- Yinshi Ren
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Xianglong Han
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Sunita P Ho
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Stephen E Harris
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Zhengguo Cao
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Aris N Economides
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Chunlin Qin
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Huazhu Ke
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Min Liu
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| | - Jian Q Feng
- *Department of Biomedical Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China; Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California, USA; Department of Periodontics, University of Texas Health Science Center, San Antonio, San Antonio, Texas, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Regeneron Pharmaceuticals, Tarrytown, New York, USA; and Department of Metabolic Disorders, Amgen Incorporated, Thousand Oaks, California, USA
| |
Collapse
|
39
|
Kowalska-Brocka J, Brocki M, Uczniak S, Uczniak K, Kaszuba A, Jurowski P. Sturge-Weber syndrome type II treated with PDL 595 nm laser. Postepy Dermatol Alergol 2015; 32:63-6. [PMID: 25821431 DOI: 10.5114/pdia.2014.40948] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 11/09/2013] [Accepted: 11/17/2013] [Indexed: 11/17/2022] Open
Abstract
Sturge-Weber syndrome (SWS) is rare congenital disorder presenting facial port-wine stains (PWS) eye abnormalities and cerebrovascular malformations. The frequency of SWS is estimated at 1 in 50 000. Cerebrovascular abnormalities can be responsible for seizures, hemiparesis, mental retardation and ophthalmologic abnormalities cause intraocular pressure, glaucoma. Etiopathogenesis of SWS remains elusive. We present a case of a 7-year-old girl with SWS type II. A port-wine stain involves the upper right part of half face and has been associated with glaucoma of both eyes. In the Department of Dermatology in 2009-2012 we performed 23 procedures within 2 months. We have been using PDL laser at wavelength 595 nm and very good cosmetic results were achieved. Given positive treatment effects, the laser therapy of port-wine stains is a method of selection. Port-wine stains in the course of SWS requires a large number of laser treatment.
Collapse
|
40
|
Ghavam SA, Aref S, Mohajerani E, Shidfar MR, Moravvej H. Laser irradiation on growth of trichophyton rubrum: an in vitro study. J Lasers Med Sci 2015; 6:10-16. [PMID: 25699162 PMCID: PMC4329136] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
INTRODUCTION Trichophyton rubrum is one of the most common species of dermatophytes which affects superficial keratinous tissue. It is not especially virulent but it can be responsible for considerable morbidity. Although there are different therapeutic modalities to treat fungal infections, clinicians are searching for alternative treatment because of the various side effects of the present therapeutic methods. As a new procedure, Laser therapy has brought on many advantages in clinical management of dermatophytes. Possible inhibitory potential of laser irradiation on fungal colonies was investigated invitro in this study. METHODS A total of 240 fungal plates of standard size of trichophyton rubrum colonies that had been cultured from the lesions of different patients at the mycology laboratory, were selected. Each fungal plate was assigned as control or experimental group. Experimental plates were irradiated by a laser system (low power laser or different wavelength of high power laser). The effects of different laser wavelengths and energies on isolated colonies were assessed. After laser irradiation, final size of colonies was measured on the first, the 7th and the 14th day after laser irradiation. RESULTS Although low power laser irradiation did not have any inhibitory effect on fungal growth, the Q-Switched Neodymium-Doped Yttrium Aluminium Garnet (Nd:YAG) laser 532nm at 8j/cm(2), Q-Switched Nd:YAG laser 1064nm at 4j/cm(2) to 8j/cm(2) and Pulsed dye laser 595nm at 8j/cm(2) to 14j/cm(2) significantly inhibited growth of trichophyton rubrum in vitro. CONCLUSION Q-Switched Nd:YAG 532nm at 8j/cm(2), Q-Switched Nd:YAG laser 1064nm at 4j/cm(2) to 8j/cm(2) and pulsed dye laser (PDL) 595nm at 8j/cm(2) to 14j/cm(2) can be effective to suppress trichophyton rubrum growth.
Collapse
Affiliation(s)
- Seyed Alireza Ghavam
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Aref
- Tehran University of Medical Sciences, Tehran, Iran
| | - Ezedin Mohajerani
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mohammad Reza Shidfar
- Department of Medical Parasitology and Mycology, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamideh Moravvej
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
41
|
Salem SAM, Abdel Fattah NSA, Tantawy SMA, El-Badawy NMA, Abd El-Aziz YA. Neodymium-yttrium aluminum garnet laser versus pulsed dye laser in erythemato-telangiectatic rosacea: comparison of clinical efficacy and effect on cutaneous substance (P) expression. J Cosmet Dermatol 2014; 12:187-94. [PMID: 23992160 DOI: 10.1111/jocd.12048] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Different laser systems are reported to be effective in treatment of telangiectasia and erythema, but comparative studies on 1064-nm neodymium-yttrium aluminum garnet (Nd-YAG) laser and pulsed dye laser (PDL) in treatment of erythemato-telangiectatic rosacea are lacking. Substance (P) is implicated in rosacea pathogenesis. OBJECTIVES To compare the effect of Nd-YAG laser and PDL on erythemato-telangiectatic rosacea, both clinically and immunohistochemically on cutaneous substance (P) expression. METHODS This split-face comparative study included 15 patients with erythemato-telangiectatic rosacea treated on the right side with Nd-YAG laser and on the left side with PDL: three sessions, 4 weeks apart. Evaluation of the patients was done using erythema and telangiectasia grading scores, patient's self-assessment, physicians' clinical assessment of the patient, and immunohistochemical assessment of substance (P). RESULTS One month after the three laser sessions, excellent response was achieved in 73.3% of patients after Nd-YAG and in 53.3% of patients after PDL with significantly lower substance (P) concentration after Nd-YAG laser than after PDL. Positive correlations were found between the decrease in erythema and telangiectasia grading scores and the decrease in substance (P) concentration. CONCLUSIONS The use of Nd-YAG laser and PDL appears to be safe and effective measures in treatment of erythemato-telangiectatic rosacea. Both types of laser decrease the concentration of substance (P) in the skin. This effect is more pronounced with Nd-YAG laser.
Collapse
Affiliation(s)
- Samar Abdallah M Salem
- Department of Dermatology and Venereology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | | | | | | | | |
Collapse
|
42
|
Sarma N, Chakraborty S, Bhattacharya SR. Acquired, Idiopathic, Patterned Facial Pigmentation (AIPFP) Including Periorbital Pigmentation and Pigmentary Demarcation Lines on Face Follows the Lines of Blaschko on Face. Indian J Dermatol 2014; 59:41-8. [PMID: 24470659 PMCID: PMC3884927 DOI: 10.4103/0019-5154.123492] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background: Acquired, non-nevoid, apparently idiopathic facial pigmentation are distributed over some specific locations like periorbital area, zygomatic area, malar area, root of nose, perioral and mandibular area. Periorbital pigmentation is the most well known entity in this group. These are bilaterally distributed homogenously diffuse gray to dark gray or slate-gray colored patches showing progressive intensification of pigmentation. These are often considered as physiologic or constitutional pigmentation. Some portions of the margins of these patches were described previously as pigmentary demarcation line (PDL- F, G, H). Aim: To analyze the distributional patterns of acquired, apparently idiopathic facial pigmentations and to evaluate the etiologic aspects of these conditions. Materials and Methods: Spatial patterns, distribution, and orientation were analyzed among 187 individuals with idiopathic non-nevoid, facial pigmentation. Observed patterns were compared with various pigmentary nevi and Blaschko's lines on face. Results: It was found that most of the idiopathic facial pigmentary alterations including periorbital pigmentation and PDL on face had specific patterned distribution that had high similarity to that of the pigmentary nevi and Blaschko's lines on face. Conclusion: It is hypothesized here that phenotypic expression of acquired patterned pigmentation (AIFPFP) is due to genetically determined increased pigmentary functional activity to various known and unknown yet natural factors like UV rays and aging. Mosaicism was a definite possibility. We also consider that the patterns actually reflected the normal patterns of embryological human pigmentation on face.
Collapse
Affiliation(s)
- Nilendu Sarma
- Department of Dermatology, Nil Ratan Sarkar Medical College, Kolkata, West Bengal, India
| | - Sayantani Chakraborty
- Department of Dermatology, Nil Ratan Sarkar Medical College, Kolkata, West Bengal, India
| | | |
Collapse
|
43
|
Tang H, Xiang Y, Jiang X, Ke Y, Xiao Z, Guo Y, Wang Q, Du M, Qin L, Zou Y, Cai Y, Chen Z, Xu R. Dual expression of hTERT and VEGF prolongs life span and enhances angiogenic ability of aged BMSCs. Biochem Biophys Res Commun 2013; 440:502-8. [PMID: 24055873 DOI: 10.1016/j.bbrc.2013.09.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 09/10/2013] [Indexed: 01/01/2023]
Abstract
Previous studies have confirmed the therapeutic effects of bone marrow stromal cells (BMSCs) transplantation on cerebral ischemia. However, the proliferative, differentiative, and homing capacity of BMSC from the elderly are significantly reduced, especially after several passages expansion in vitro. In this study, by introducing lentivirus-mediated hTERT and VEGF genes to modify human BMSCs from aged donors, we observed extended lifespan, promoted angiogenic capacity while less enhanced tumorigenicity of the genetically engineering BMSCs. These results therefore suggest that the modification of aged BMSCs by dual expression of hTERT and VEGF may be used for autologous cell replacement for ischemic cerebrovascular disease in elderly patients.
Collapse
Affiliation(s)
- Hao Tang
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China; Department of Neurosurgery, Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA, Beijing, China
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Wu Y, Han X, Guo Y, Wu H, Ren J, Li J, Ai D, Wang L, Bai D. Response of immortalized murine cementoblast cells to hypoxia in vitro. Arch Oral Biol 2013; 58:1718-25. [PMID: 24112739 DOI: 10.1016/j.archoralbio.2013.08.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 09/30/2012] [Revised: 06/13/2013] [Accepted: 08/02/2013] [Indexed: 02/05/2023]
Abstract
OBJECTIVES The aim of the study was to investigate the impact of hypoxia on proliferation, apoptosis and mineralization of cementoblast-like cells (OCCM-30) in vitro. METHODS The effects of different periods of hypoxia (2% O2) on proliferation, apoptosis, cementoblastic potential and root cementum resorption capability of OCCM-30 were evaluated, by using MTT, flow cytometry, alkaline phosphatase (ALP) activity assay, reverse transcription-polymerase chain reaction measurement, enzyme-linked immunosorbent assay and mineralization nodule formation assay. RESULTS OCCM-30 viability was significantly inhibited by hypoxia while the apoptosis ratio was enhanced in a time-dependent manner; hypoxia inducible factor-1α and vascular endothelial growth factor mRNA were induced by hypoxia in different manners; temporary hypoxia (<24 h) stimulated cementoblastic function of OCCM-30, while long-term hypoxia inhibited it, manifested by decreased mRNA level or release of ALP, osteocalcin, bone sialoprotein, osteopontin and osteoprotegerin. In addition, hypoxia affected mineralized nodule formation of OCCM-30 in a time-dependent fashion; moreover, root cementum resorption function was also induced by hypoxia, manifested by increased receptor activator of nuclear factor kappa B ligand mRNA and protein expression. CONCLUSION Temporary exposure of OCCM-30 to hypoxia inhibited proliferation, promoted apoptosis and mineralization, while longer duration of hypoxia could inhibit the cementoblast function. The findings may provide theoretical basis for developing novel therapeutics to prevent root resorption during orthodontic treatment.
Collapse
Affiliation(s)
- Yeke Wu
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Kodama D, Togari A. Store-operated calcium entry induced by activation of Gq-coupled alpha1B adrenergic receptor in human osteoblast. Biochem Biophys Res Commun 2013; 437:239-44. [PMID: 23806689 DOI: 10.1016/j.bbrc.2013.06.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 06/15/2013] [Indexed: 11/26/2022]
Abstract
Recent studies have revealed that the sympathetic nervous system is involved in bone metabolism. We previously reported that noradrenaline (NA) suppressed K(+) currents via Gi/o protein-coupled alpha1B-adrenergic receptor (α1B-AR) in human osteoblast SaM-1 cells. Additionally, it has been demonstrated that the intracellular Ca(2+) level ([Ca(2+)]i) was increased by NA via α1B-AR. In this study, we investigated the signal pathway of NA-induced [Ca(2+)]i elevation by using Ca(2+) fluorescence imaging in SaM-1 cells. NA-induced [Ca(2+)]i elevation was suppressed by pretreatment with a PLC inhibitor, U73122. This suggested that the [Ca(2+)]i elevation was mediated by Gq protein-coupled α1B-AR. On the other hand, NA-induced [Ca(2+)]i elevation was completely abolished in Ca(2+)-free solution, which suggested that Ca(2+) influx is the predominant pathway of NA-induced [Ca(2+)]i elevation. Although the inhibition of K(+) channel by NA caused membrane depolarization, the [Ca(2+)]i elevation was not affected by voltage-dependent Ca(2+) channel blockers, nifedipine and mibefradil. Meanwhile, NA-induced [Ca(2+)]i elevation was abolished following activation of store-operated Ca(2+) channel by thapsigargin. Additionally, the [Ca(2+)]i elevation was suppressed by store-operated channel inhibitors, 2-APB, flufenamate, GdCl3 and LaCl3. These results suggest that Ca(2+) influx through store-operated Ca(2+) channels plays a critical role in the signal transduction pathway of Gq protein-coupled α1B-AR in human osteoblasts.
Collapse
Affiliation(s)
- Daisuke Kodama
- Department of Pharmacology, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan.
| | | |
Collapse
|
46
|
Alam M, Voravutinon N, Warycha M, Whiting D, Nodzenski M, Yoo S, West DP, Veledar E, Poon E. Comparative effectiveness of nonpurpuragenic 595-nm pulsed dye laser and microsecond 1064-nm neodymium:yttrium-aluminum-garnet laser for treatment of diffuse facial erythema: A double-blind randomized controlled trial. J Am Acad Dermatol 2013; 69:438-43. [PMID: 23688651 DOI: 10.1016/j.jaad.2013.04.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/25/2013] [Accepted: 04/02/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND Facial erythema is a common symptom that responds to vascular laser treatment, but there are few comparative studies. OBJECTIVE We sought to compare the effectiveness of microsecond 1064-nm neodymium:yttrium-aluminum-garnet (Nd:YAG) laser with nonpurpuragenic 595-nm pulsed dye laser (PDL) for diffuse facial erythema. METHODS This was a split-face, double-blind randomized controlled trial. Bilateral cheeks received 4 treatments each at one month intervals with PDL or Nd:YAG. Spectrophotometer measurements, digital photographs, pain scores, and patient preferences were recorded. RESULTS Sixteen patients enrolled and 2 dropped out. Fourteen patients, all skin types I to III, 57% women, mean age 42 years, completed the study and were analyzed. Spectrophotometer readings changed after both PDL (8.9%) and Nd:YAG (2.5%), but varied by treatment type, with PDL reducing facial redness 6.4% more from baseline than Nd:YAG (P = .0199; 95% confidence interval -11.6 to -1.2). Pain varied (P = .0028), with Nd:YAG associated with less pain, at 3.07, than PDL at 3.87. Subjects rated redness as improved by 52% as a result of PDL, and 34% as a result of Nd:YAG (P = .031; 95% confidence interval -34.6 to -1.94). No serious adverse events were observed. LIMITATIONS Lasers settings are not standardized across devices. CONCLUSION Facial erythema is safely and effectively treated with PDL and Nd:YAG. Nonpupuragenic PDL may be more effective for lighter-skinned patients, but microsecond Nd:YAG may be less painful.
Collapse
Affiliation(s)
- Murad Alam
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Ghaninejhadi H, Ehsani A, Edrisi L, Gholamali F, Akbari Z, Noormohammadpour P. Solar Lentigines: Evaluating Pulsed Dye Laser ( PDL) as an Effective Treatment Option. J Lasers Med Sci 2013; 4:33-38. [PMID: 25606304 PMCID: PMC4281975] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
INTRODUCTION Solar lentigines are among commonest cosmetic problems. There are many topical therapies suggested to treat these lesions including cryotherapy, chemical peeling with tri chloro acetic acid (TCA) and laser therapy with q-switched lasers as well as long pulsed lasers. Considering possible treatment side effects (PIH, scar) with cryotherapy and peeling in Iranian patients (darker skin types) it seems necessary to try to find alternative measures. The aim of the present study was to evaluate effect of long pulsed dye laser (LPDL) on lentigines via an objective method (computerized dermoscopy). METHODS Patients with pathologically confirmed lentigines were selected if they agreed to participate in the study,were not treated before, hadn't history of psoriasis, vitiligo, scar formation and were not pregnant. Letigines were dermoscopied before and after treatment with PDL (V-beam, 595nm, Candela Corp. Wayland, USA) using fluence of 10 joules,without DCD (dynamic cooling device) via extra compress lens provided with laser system.The resulting figures were compared by two academic unrelated dermatologists as well as by computerized analysis. Post laser side effects were treated with topical antibiotics and mild topical steroids. Patients were followed for six months after the end of the study to determine the rate of recurrence via dermoscopy of sites of previous lesions and also delayed side effects. RESULTS A total of 21 patients with the same number of lesions, were included in the study.Mean age of patients was 54.2 years (±23.3) ranging from 39 to 71 years. Included patient swere 18 females and three males. From 21 treated lesions, 11 were located on the hands and 10 on the face. Comparing before and after photographs taken through dermoscopy system,revealed that approximately 57% of patients had more than 75% improvement. Mean pigment analysis score (calculated by computerized dermoscope software) was respectively 8 and 2 before and after PDL therapy, showing noticeable decrease in pigment density of lesions.Side effects were mild erythema and local irritation responding to topical mild steroids.No hypo or persistent hyper pigmentation or other delayed side effects was seen after six months follow up. One patient experienced transient hyper pigmentation of treatment site after treatment. During six months follow up, no recurrences were seen. CONCLUSION In conclusion, PDL is a safe and effective option to treat lentigines if applied properly using compression method, especially in Iranian patients. However, further studies with larger sample size are required to confirm these results.
Collapse
Affiliation(s)
| | | | - Ladan Edrisi
- Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Zahra Akbari
- Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | |
Collapse
|
48
|
El-Bialy T, Alhadlaq A, Lam B. Effect of therapeutic ultrasound on human periodontal ligament cells for dental and periodontal tissue engineering. Open Dent J 2012; 6:235-9. [PMID: 23308087 PMCID: PMC3540784 DOI: 10.2174/1874210601206010235] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 07/05/2012] [Revised: 08/10/2012] [Accepted: 09/27/2012] [Indexed: 01/18/2023] Open
Abstract
The objective of this study was to investigate whether low intensity pulsed ultrasound (LIPUS) has anabolic effects on human periodontal ligament (PDL) cells. The PDL cells were plated in 48-well plates and cultured at 37°C in an atmosphere of 5% CO2 in air, in a humidified incubator until confluent. The cells were divided into three groups including control, 5 min and 10 min ultrasound application. The LIPUS was applied using a 2.5 transducer that produces an incident intensity of 30 mW/cm2 of the transducer's surface area. The results from the quantitative polymerase chain reaction (PCR) indicates that expression levels of alkaline phosphatase (ALP),cyclin D1 (CYC), nucleostemin (NCT) were increased after four weeks of 10 minutes of daily ultrasound treatment. The increased ALP/DNA by LIPUS shows a time dependent pattern with the highest activity occurring after four weeks of treatment. These results demonstrate that LIPUS has an anabolic effect on PDL cells and suggest that LIPUS may enhance the pluripotent characteristics of PDL cells as indicated by the up-regulation of NCT, a stem marker. These results also may explain the potential role of LIPUS in periodontal tissue regeneration.
Collapse
Affiliation(s)
- Tarek El-Bialy
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | | | | |
Collapse
|
49
|
Affiliation(s)
- Cs Scanlon
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry , Ann Arbor, MI 48109
| | - Jt Marchesan
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry , Ann Arbor, MI 48109
| | - S Soehren
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry , Ann Arbor, MI 48109
| | - M Matsuo
- Department of Oral Anatomy, Kanagawa Dental College , Yokosuka, Kanagawa, 238-8580, Japan
| | - Y Kapila
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry , Ann Arbor, MI 48109
| |
Collapse
|