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Rodrigues NS, França CM, Tahayeri A, Ren Z, Saboia VPA, Smith AJ, Ferracane JL, Koo H, Bertassoni LE. Biomaterial and Biofilm Interactions with the Pulp-Dentin Complex-on-a-Chip. J Dent Res 2021; 100:1136-1143. [PMID: 34036838 DOI: 10.1177/00220345211016429] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Calcium silicate cements (CSCs) are the choice materials for vital pulp therapy because of their bioactive properties, promotion of pulp repair, and dentin bridge formation. Despite the significant progress made in understanding CSCs' mechanisms of action, the key events that characterize the early interplay between CSC-dentin-pulp are still poorly understood. To address this gap, a microfluidic device, the "tooth-on-a-chip," which was developed to emulate the biomaterial-dentin-pulp interface, was used to test 1) the effect of CSCs (ProRoot, Biodentine, and TheraCal) on the viability and proliferation of human dental pulp stem cells, 2) variations of pH, and 3) release within the pulp chamber of transforming growth factor-β (TGFβ) as a surrogate of the bioactive dentin matrix molecules. ProRoot significantly increased the extraction of TGFβ (P < 0.05) within 24 to 72 h and, along with Biodentine, induced higher cell proliferation (P > 0.05), while TheraCal decreased cell viability and provoked atypical changes in cell morphology. No correlation between TGFβ levels and pH was observed. Further, we established a biofilm of Streptococcus mutans on-chip to model the biomaterial-biofilm-dentin interface and conducted a live and dead assay to test the antimicrobial capability of ProRoot in real time. In conclusion, the device allows for direct characterization of the interaction of bioactive dental materials with the dentin-pulp complex on a model of restored tooth while enabling assessment of antibiofilm properties at the interface in real time that was previously unattainable.
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Affiliation(s)
- N S Rodrigues
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - C M França
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - A Tahayeri
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Z Ren
- Department of Orthodontics, Divisions of Community Oral Health & Pediatric Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - V P A Saboia
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - A J Smith
- School of Dentistry, University of Birmingham, Birmingham, UK
| | - J L Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - H Koo
- Department of Orthodontics, Divisions of Community Oral Health & Pediatric Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Center for Innovation & Precision Dentistry, School of Dental Medicine and School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - L E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.,Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA.,Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA.,Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA
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2
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Fugolin APP, Navarro O, Logan MG, Huynh V, França CM, Ferracane JL, Pfeifer CS. Synthesis of di- and triacrylamides with tertiary amine cores and their evaluation as monomers in dental adhesive interfaces. Acta Biomater 2020; 115:148-159. [PMID: 32853802 DOI: 10.1016/j.actbio.2020.08.026] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/24/2020] [Accepted: 08/14/2020] [Indexed: 01/13/2023]
Abstract
PURPOSE/AIM In an attempt to increase the service life of dental adhesive interfaces, more hydrolytically and enzymatically-stable methacrylate alternatives, such as methacrylamides, have been proposed. The aim of this study was to investigate polymerization behavior, as well as mechanical and biological properties of experimental adhesives containing multi-functional acrylamides. MATERIALS AND METHODS Multi-functional acrylamides (N,N-Bis[(3-methylaminoacryl)propyl]methylamine - BMAAPMA, Tris[(2-methylaminoacryl)ethyl]amine - TMAAEA, N,N'-bis(acrylamido) 1,4-diazepane - BAADA, N,N-Diethyl-1,3-bis(acrylamido)propane - DEBAAP) or HEMA (2-Hydroxyethyl methacrylate - control) were added at 40 wt% to UDMA. 0.2 wt% DMPA and 0.4 wt% DPI-PF6 were used as initiators. Polymerization kinetics was followed in real-time in near-IR during photoactivation (320-500 nm, at 630 mW/cm2). Water sorption/solubility and flexural strength/modulus were measured according to ISO 4049. 1H NMR was used to assess monomer degradation kinetics. MTT assay was used to assess cytotoxicity against OD-21 and DPSC cells. Biofilm formation and adhesion were assessed by Luciferase Assay and Impingement technique, respectively. Solvated adhesives (40 vol% ethanol) were used to test interfacial adhesion strength. The results were analyzed by ANOVA/Tukey's test (α = 0.05). RESULTS In general, the pure methacrylate mixture had higher rate of polymerization (Rpmax), degree of conversion (DC) at Rpmax, and final DC than the acrylamides. Flexural properties after water storage decreased between 11 and 65%, more markedly for acrylamides. Interfacial bond strength was greater and more stable long-term for the newly synthesized acrylamide formulations (less than 4% reduction at 6 months) compared to the methacrylate experimental control (42% reduction at 6 months). HEMA degraded by almost 90%, while the acrylamides showed no degradation in acidic conditions. Cytotoxicity and biofilm formation, in general, were similar for all groups. CONCLUSIONS Despite demonstrating high water sorption, the acrylamide-containing materials had similar mechanical and biological properties and enhanced interfacial bond strength stability compared to the methacrylate control.
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Affiliation(s)
- A P P Fugolin
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Oscar Navarro
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Matthew G Logan
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Vincent Huynh
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Cristiane M França
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Jack L Ferracane
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA
| | - Carmem S Pfeifer
- Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland OR 97239, USA.
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Horsophonphong S, Sercia A, França CM, Tahayeri A, Reddy AP, Wilmarth PA, Surarit R, Smith AJ, Ferracane JL, Bertassoni LE. Equivalence of human and bovine dentin matrix molecules for dental pulp regeneration: proteomic analysis and biological function. Arch Oral Biol 2020; 119:104888. [PMID: 32932150 DOI: 10.1016/j.archoralbio.2020.104888] [Citation(s) in RCA: 4] [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: 05/01/2020] [Revised: 08/13/2020] [Accepted: 08/21/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To compare proteomics and biological function of human dentin matrix molecules (hDMMs) and bovine dentin matrix molecules (bDMMs). DESIGN Dentin powder from human or bovine teeth (n = 4) was demineralized in 10% (v/v) ethylenediaminetetraacetic acid for 7 days. The extracts were dialyzed, lyophilized and proteins were characterized using liquid chromatography-tandem mass spectrometry and shotgun proteomic analysis. To study biological function, mouse-derived undifferentiated dental pulp cells (OD21) were treated with 0.01, 0.1 or 1 μg/mL of hDMMs or bDMMs and proliferation was measured after 24 hours and 48 hours using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell migration was assessed after 24 hours using a Boyden chamber. Alizarin Red S staining was used to evaluate mineral formation. RESULTS There were 307 proteins identified, of which 93 proteins were common to both species. Gene Ontology functional analysis demonstrated similar pattern of biological process in both species which consisted mainly of tissue development and biomineralization. hDMMs and bDMMs both enhanced cell proliferation. After 24 hours, all concentrations of bDMMs promoted cell proliferation (p ≤ 0.05), while hDMMs did not affect proliferation. After 48 hours, groups with 1μg/mL of bDMMs and 0.01μg/mL of hDMMs had increased cell proliferation compared to control (p ≤ 0.0001). All concentrations of hDMMs and bDMMs enhanced cell migration and mineralization (p ≤ 0.0001). CONCLUSION bDMMs has similar biological functions as hDMMs. Moreover, bDMMs stimulated cell proliferation, migration and differentiation similar to hDMMs.
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Affiliation(s)
- Sivaporn Horsophonphong
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA; Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand; Department of Pediatric Dentistry, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Ashley Sercia
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Cristiane M França
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Ashok P Reddy
- Proteomics Shared Resource, Oregon Health and & Science University, Portland, OR, 97239, USA
| | - Phillip A Wilmarth
- Proteomics Shared Resource, Oregon Health and & Science University, Portland, OR, 97239, USA
| | - Rudee Surarit
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Anthony J Smith
- School of Dentistry, University of Birmingham, Birmingham, UK
| | - Jack L Ferracane
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Luiz E Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA; Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA; Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA; Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA.
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4
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França CM, Thrivikraman G, Athirasala A, Tahayeri A, Gower LB, Bertassoni LE. The influence of osteopontin-guided collagen intrafibrillar mineralization on pericyte differentiation and vascularization of engineered bone scaffolds. J Biomed Mater Res B Appl Biomater 2019; 107:1522-1532. [PMID: 30267638 PMCID: PMC6440878 DOI: 10.1002/jbm.b.34244] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/25/2018] [Accepted: 08/25/2018] [Indexed: 12/17/2022]
Abstract
Biomimetically mineralized collagen scaffolds are promising for bone regeneration, but vascularization of these materials remains to be addressed. Here, we engineered mineralized scaffolds using an osteopontin-guided polymer-induced liquid-precursor mineralization method to recapitulate bone's mineralized nanostructure. SEM images of mineralized samples confirmed the presence of collagen with intrafibrillar mineral, also EDS spectra and FTIR showed high peaks of calcium and phosphate, with a similar mineral/matrix ratio to native bone. Mineralization increased collagen compressive modulus up to 15-fold. To evaluate vasculature formation and pericyte-like differentiation, HUVECs and hMSCs were seeded in a 4:1 ratio in the scaffolds for 7 days. Moreover, we used RT-PCR to investigate the gene expression of pericyte markers ACTA2, desmin, CD13, NG2, and PDGFRβ. Confocal images showed that both nonmineralized and mineralized scaffolds enabled endothelial capillary network formation. However, vessels in the nonmineralized samples had longer vessel length, a larger number of junctions, and a higher presence of αSMA+ mural cells. RT-PCR analysis confirmed the downregulation of pericytic markers in mineralized samples. In conclusion, although both scaffolds enabled endothelial capillary network formation, mineralized scaffolds presented less pericyte-supported vessels. These observations suggest that specific scaffold characteristics may be required for efficient scaffold vascularization in future bone tissue engineering strategies. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1522-1532, 2019.
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Affiliation(s)
- Cristiane M. França
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, OR, USA
- Nove de Julho University, São Paulo, SP, Brazil
| | - Greeshma Thrivikraman
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, OR, USA
| | - Avathamsa Athirasala
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, OR, USA
| | - Laurie B. Gower
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL, USA
| | - Luiz E. Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health and Science University, Portland, OR, USA
- Center for Regenerative Medicine, School of Medicine, Oregon Health and Science University, Portland, OR, USA
- Department of Biomedical Engineering, School of Medicine, Oregon Health and Science University, Portland, OR, USA
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5
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Trindade GG, Thrivikraman G, Menezes PP, França CM, Lima BS, Carvalho YM, Souza EP, Duarte MC, Shanmugam S, Quintans-Júnior LJ, Bezerra DP, Bertassoni LE, Araújo AA. Carvacrol/β-cyclodextrin inclusion complex inhibits cell proliferation and migration of prostate cancer cells. Food Chem Toxicol 2019; 125:198-209. [DOI: 10.1016/j.fct.2019.01.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/02/2018] [Accepted: 01/03/2019] [Indexed: 01/17/2023]
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6
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Souza NHC, Mesquita-Ferrari RA, Rodrigues MFSD, da Silva DFT, Ribeiro BG, Alves AN, Garcia MP, Nunes FD, da Silva Junior EM, França CM, Bussadori SK, Fernandes KPS. Photobiomodulation and different macrophages phenotypes during muscle tissue repair. J Cell Mol Med 2018; 22:4922-4934. [PMID: 30024093 PMCID: PMC6156453 DOI: 10.1111/jcmm.13757] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 03/01/2018] [Accepted: 06/09/2018] [Indexed: 12/12/2022] Open
Abstract
Macrophages play a very important role in the conduction of several regenerative processes mainly due to their plasticity and multiple functions. In the muscle repair process, while M1 macrophages regulate the inflammatory and proliferative phases, M2 (anti‐inflammatory) macrophages direct the differentiation and remodelling phases, leading to tissue regeneration. The aim of this study was to evaluate the effect of red and near infrared (NIR) photobiomodulation (PBM) on macrophage phenotypes and correlate these findings with the repair process following acute muscle injury. Wistar rats were divided into 4 groups: control; muscle injury; muscle injury + red PBM; and muscle injury + NIR PBM. After 2, 4 and 7 days, the tibialis anterior muscle was processed for analysis. Macrophages phenotypic profile was evaluated by immunohistochemistry and correlated with the different stages of the skeletal muscle repair by the qualitative and quantitative morphological analysis as well as by the evaluation of IL‐6,TNF‐α and TGF‐β mRNA expression. Photobiomodulation at both wavelengths was able to decrease the number of CD68+ (M1) macrophages 2 days after muscle injury and increase the number of CD163+ (M2) macrophages 7 days after injury. However, only NIR treatment was able to increase the number of CD206+ M2 macrophages (Day 2) and TGF‐β mRNA expression (Day 2, 4 and 7), favouring the repair process more expressivelly. Treatment with PBM was able to modulate the inflammation phase, optimize the transition from the inflammatory to the regeneration phase (mainly with NIR light) and improve the final step of regeneration, enhancing tissue repair.
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Affiliation(s)
- Nadhia H C Souza
- Postgraduate Program in Rehabilition Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Raquel A Mesquita-Ferrari
- Postgraduate Program in Rehabilition Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil.,Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Maria Fernanda S D Rodrigues
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Daniela F T da Silva
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Beatriz G Ribeiro
- Postgraduate Program in Rehabilition Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Agnelo N Alves
- Postgraduate Program in Rehabilition Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil.,Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Mónica P Garcia
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Fábio D Nunes
- Departament of Oral Pathology, School of Dentistry, University of São Paulo (FOUSP), São Paulo, Brazil
| | - Evaldo M da Silva Junior
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Cristiane M França
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Sandra K Bussadori
- Postgraduate Program in Rehabilition Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil.,Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
| | - Kristianne P S Fernandes
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, Brazil
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Andreo L, Mesquita-Ferrari RA, Ribeiro BG, Benitte A, de Fátima Nogueira T, França CM, Silva DDFTD, Bussadori SK, Fernandes KPS, Corrêa FI, Corrêa JCF. Effects of myogenic precursor cells (C2C12) transplantation and low-level laser therapy on muscle repair. Lasers Surg Med 2018; 50:781-791. [PMID: 29399847 DOI: 10.1002/lsm.22798] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2018] [Indexed: 02/28/2024]
Abstract
OBJECTIVE The aim of the present study was to evaluate the effects of myoblast inoculation in combination with photobiomodulation therapy (PBMT) on skeletal muscle tissue following injury. MATERIALS AND METHODS Sixty-five Wistar rats were divided into five groups: Control-animals not submitted to any procedure; Injury-cryoinjury of the tibialis anterior muscle; HBSS-animals submitted to cryoinjury and intramuscular Hank's Balanced Salt Solution; Injury + Cells-animals submitted to cryoinjury, followed by myogenic precursor cells (C2C12) transplantation; Injury + Cells + LLLT-animals submitted to cryoinjury, followed by myogenic precursor cells (C2C12) transplantation and PBMT (780 nm, 40 mW, 3.2 J in 8 points). The periods analyzed were 1, 3, and 7 days. The tibialis anterior muscle was harvest for histological analysis, collagen analysis, and immunolabeling of macrophages. RESULTS No differences were found between the HBSS group and injury group. The Injury + Cells group exhibited an increase of inflammatory cells and immature fibers as well as a decrease in the number of macrophages on Day 1. The Injury + Cells + LLLT group exhibited a decrease in myonecrosis and inflammatory infiltrate at 7 days, but an increase in inflammatory infiltrate at 1 and 3 days as well as an increase in blood vessels at 3 and 7 days, an increase in macrophages at 3 days and better collagen organization at 7 days. CONCLUSION Cell transplantation combined with PBMT led to an increase in the number of blood vessels, a reduction in myonecrosis and total inflammatory cells as well as better organization of collagen fibers during the skeletal muscle repair process. Lasers Surg. Med. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Lucas Andreo
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, SP, Brazil
| | - Raquel A Mesquita-Ferrari
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, SP, Brazil
- Postgraduate Program in Rehabilitation Sciences, UNINOVE, São Paulo, SP, Brazil
| | - Beatriz G Ribeiro
- Postgraduate Program in Rehabilitation Sciences, UNINOVE, São Paulo, SP, Brazil
| | | | | | - Cristiane M França
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, SP, Brazil
| | | | - Sandra K Bussadori
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, SP, Brazil
- Postgraduate Program in Rehabilitation Sciences, UNINOVE, São Paulo, SP, Brazil
| | - Kristianne P S Fernandes
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, SP, Brazil
| | - Fernanda I Corrêa
- Postgraduate Program in Rehabilitation Sciences, UNINOVE, São Paulo, SP, Brazil
| | - João C F Corrêa
- Postgraduate Program in Rehabilitation Sciences, UNINOVE, São Paulo, SP, Brazil
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Athirasala A, Tahayeri A, Thrivikraman G, França CM, Monteiro N, Tran V, Ferracane J, Bertassoni LE. A dentin-derived hydrogel bioink for 3D bioprinting of cell laden scaffolds for regenerative dentistry. Biofabrication 2018; 10:024101. [PMID: 29320372 DOI: 10.1088/1758-5090/aa9b4e] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Recent studies in tissue engineering have adopted extracellular matrix (ECM) derived scaffolds as natural and cytocompatible microenvironments for tissue regeneration. The dentin matrix, specifically, has been shown to be associated with a host of soluble and insoluble signaling molecules that can promote odontogenesis. Here, we have developed a novel bioink, blending printable alginate (3% w/v) hydrogels with the soluble and insoluble fractions of the dentin matrix. We have optimized the printing parameters and the concentrations of the individual components of the bioink for print accuracy, cell viability and odontogenic potential. We find that, while viscosity, and hence printability of the bioinks, was greater in the formulations containing higher concentrations of alginate, a higher proportion of insoluble dentin matrix proteins significantly improved cell viability; where a 1:1 ratio of alginate and dentin (1:1 Alg-Dent) was most suitable. We further demonstrate high retention of the soluble dentin molecules within the 1:1 Alg-Dent hydrogel blends, evidencing renewed interactions between these molecules and the dentin matrix post crosslinking. Moreover, at concentrations of 100 μg ml-1, these soluble dentin molecules significantly enhanced odontogenic differentiation of stem cells from the apical papilla encapsulated in bioprinted hydrogels. In summary, the proposed novel bioinks have demonstrable cytocompatibility and natural odontogenic capacity, which can be a used to reproducibly fabricate scaffolds with complex three-dimensional microarchitectures for regenerative dentistry in the future.
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Affiliation(s)
- Avathamsa Athirasala
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, United States of America
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9
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Monteiro N, Thrivikraman G, Athirasala A, Tahayeri A, França CM, Ferracane JL, Bertassoni LE. Photopolymerization of cell-laden gelatin methacryloyl hydrogels using a dental curing light for regenerative dentistry. Dent Mater 2017; 34:389-399. [PMID: 29199008 DOI: 10.1016/j.dental.2017.11.020] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [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: 09/11/2017] [Revised: 11/16/2017] [Accepted: 11/18/2017] [Indexed: 01/12/2023]
Abstract
Photopolymerized hydrogels, such as gelatin methacryloyl (GelMA), have desirable biological and mechanical characteristics for a range of tissue engineering applications. OBJECTIVE This study aimed to optimize a new method to photopolymerize GelMA using a dental curing light (DL). METHODS Lithium acylphosphinate photo-initiator (LAP, 0.05, 0.067, 0.1% w/v) was evaluated for its ability to polymerize GelMA hydrogel precursors (10% w/v) encapsulated with odontoblast-like cells (OD21). Different irradiances (1650, 2300 and 3700mW/cm2) and photo-curing times (5-20s) were tested, and compared against the parameters typically used in UV light photopolymerization (45mW/cm2, 0.1% w/v Irgacure 2959 as photoinitiator). Physical and mechanical properties of the photopolymerized GelMA hydrogels were determined. Cell viability was assessed using a live and dead assay kit. RESULTS Comparing DL and UV polymerization methods, the DL method photopolymerized GelMA precursor faster and presented larger pore size than the UV polymerization method. The live and dead assay showed more than 80% of cells were viable when hydrogels were photopolymerized with the different DL irradiances. However, the cell viability decreased when the exposure time was increased to 20s using the 1650mW/cm2 intensity, and when the LAP concentration was increased from 0.05 to 0.1%. Both DL and UV photocrosslinked hydrogels supported a high percentage of cell viability and enabled fabrication of micropatterns using a photolithography microfabrication technique. SIGNIFICANCE The proposed method to photopolymerize GelMA cell-laden hydrogels using a dental curing light is effective and represents an important step towards the establishment of chair-side procedures in regenerative dentistry.
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Affiliation(s)
- Nelson Monteiro
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA
| | - Greeshma Thrivikraman
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA
| | - Avathamsa Athirasala
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA
| | - Cristiane M França
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA; Biophotonics Applied to Health Sciences Post-Graduation Program, Nove de Julho University, São Paulo, SP, Brazil
| | - Jack L Ferracane
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA
| | - Luiz E Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, USA; Department of Biomedical Engineering, School of Medicine, Oregon Health and Science University, Portland, OR, USA; Center for Regenerative Medicine, Oregon Health and Science University, Portland, OR, USA.
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Sabino CP, Deana AM, Yoshimura TM, da Silva DFT, França CM, Hamblin MR, Ribeiro MS. The optical properties of mouse skin in the visible and near infrared spectral regions. J Photochem Photobiol B 2016; 160:72-8. [PMID: 27101274 DOI: 10.1016/j.jphotobiol.2016.03.047] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 03/07/2016] [Accepted: 03/24/2016] [Indexed: 10/22/2022]
Abstract
Visible and near-infrared radiation is now widely employed in health science and technology. Pre-clinical trials are still essential to allow appropriate translation of optical methods into clinical practice. Our results stress the importance of considering the mouse strain and gender when planning pre-clinical experiments that depend on light-skin interactions. Here, we evaluated the optical properties of depilated albino and pigmented mouse skin using reproducible methods to determine parameters that have wide applicability in biomedical optics. Light penetration depth (δ), absorption (μa), reduced scattering (μ's) and reduced attenuation (μ't) coefficients were calculated using the Kubelka-Munk model of photon transport and spectrophotometric measurements. Within a broad wavelength coverage (400-1400nm), the main optical tissue interactions of visible and near infrared radiation could be inferred. Histological analysis was performed to correlate the findings with tissue composition and structure. Disperse melanin granules present in depilated pigmented mouse skin were shown to be irrelevant for light absorption. Gender mostly affected optical properties in the visible range due to variations in blood and abundance of dense connective tissue. On the other hand, mouse strains could produce more variations in the hydration level of skin, leading to changes in absorption in the infrared spectral region. A spectral region of minimal light attenuation, commonly referred as the "optical window", was observed between 600 and 1350nm.
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Affiliation(s)
- Caetano P Sabino
- Center for Lasers and Applications, Nuclear and Energy Research Institute, IPEN-CNEN/SP, São Paulo, SP, Brazil; Institute for Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil; School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Alessandro M Deana
- Biophotonics Post-Graduation Program, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Tania M Yoshimura
- Center for Lasers and Applications, Nuclear and Energy Research Institute, IPEN-CNEN/SP, São Paulo, SP, Brazil
| | - Daniela F T da Silva
- Biophotonics Post-Graduation Program, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Cristiane M França
- Biophotonics Post-Graduation Program, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Martha S Ribeiro
- Center for Lasers and Applications, Nuclear and Energy Research Institute, IPEN-CNEN/SP, São Paulo, SP, Brazil.
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França CM, Batista AC, Borra RC, Ventiades-Flores JA, Mendonça EF, Deana AM, Mesquita-Ferrari RA, de Natali Caly D, de Mello Rode S, Faria MR. Macrophage migration inhibitory factor and oral cancer. J Oral Pathol Med 2012; 42:368-73. [DOI: 10.1111/jop.12011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2012] [Indexed: 01/02/2023]
Affiliation(s)
- Cristiane M. França
- Post-Graduation Program of Biophotonics Applied to Health Sciences; Nove de Julho University; São Paulo Brazil
| | - Aline C. Batista
- Department of Stomatology (Oral Pathology); Dental School; Federal University of Goiás; Goiânia Brazil
| | - Ricardo C. Borra
- Post-graduation Program in Stomatology; São Leopoldo Mandic School of Dentistry; Campinas-SP Brazil
| | | | - Elismauro F. Mendonça
- Division of Head and Neck; Araújo Jorge Hospital; Association of Cancer Combat of Goiás; Goiânia Brazil
| | - Alessandro M. Deana
- Post-Graduation Program of Biophotonics Applied to Health Sciences; Nove de Julho University; São Paulo Brazil
| | - Raquel A. Mesquita-Ferrari
- Post-Graduation Program of Biophotonics Applied to Health Sciences; Nove de Julho University; São Paulo Brazil
| | - Decio de Natali Caly
- Post-Graduation Program of Medical Sciences; Nove de Julho University; São Paulo Brazil
| | - Sigmar de Mello Rode
- São José dos Campos Dentistry School; UNESP; São José dos Campos São Paulo Brazil
| | - Miriam R. Faria
- Department of Cell and Developmental Biology; Institute of Biomedical Sciences, University of São Paulo; São Paulo Brazil
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Prates RA, Yamada AM, Suzuki LC, França CM, Cai S, Mayer MPA, Ribeiro AC, Ribeiro MS. Histomorphometric and microbiological assessment of photodynamic therapy as an adjuvant treatment for periodontitis: a short-term evaluation of inflammatory periodontal conditions and bacterial reduction in a rat model. Photomed Laser Surg 2011; 29:835-44. [PMID: 21916615 PMCID: PMC3231969 DOI: 10.1089/pho.2010.2984] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE The aim of this study was to investigate the short-term effects of photodynamic therapy (PDT) in periodontal tissue when it is used as an adjuvant treatment for periodontitis. BACKGROUND DATA PDT has been used as an adjuvant in the combat of local infections, such as periodontitis, and combines a photosensitizer (PS) with a light source to induce reactive oxygen species (ROS) and kill microbial cells. METHODS Fifty healthy male rats were used in this study. Periodontitis was induced by placing a cotton ligature around the upper left second molar in a subgingival position. Posterior maxillas were removed and histologically prepared with hematoxylin & eosin (H&E) staining techniques. PDT was performed with a diode laser (λ=660 nm) with an output power of 100 mW. Methylene blue aqueous solution (100 μM) was used as the PS while control group used phosphate buffered saline (PBS). Collagen organization, inflammatory infiltrate, and bone loss were evaluated. Bacterial samples were collected before and immediately after treatment to determine bacterial reduction. RESULTS The experimental group that was treated with PDT presented better periodontal healing, as measured by collagen organization, inflammatory infiltrate, and bone loss. Significant bacterial reduction was achieved following treatment with or without PDT compared to control, with a higher microbial reduction observed in the PDT group. CONCLUSIONS PDT used as an adjuvant treatment showed effective short-term control of periodontitis infection.
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Affiliation(s)
- Renato A Prates
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas Nucleares, IPEN-CNEN/SP, Cidade Universitária , São Paulo, SP, Brazil.
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França CM, França CM, Núñez SC, Prates RA, Noborikawa E, Faria MR, Ribeiro MS. Low-intensity red laser on the prevention and treatment of induced-oral mucositis in hamsters. Journal of Photochemistry and Photobiology B: Biology 2009; 94:25-31. [DOI: 10.1016/j.jphotobiol.2008.09.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Revised: 07/28/2008] [Accepted: 09/24/2008] [Indexed: 11/16/2022]
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Ramos GHA, Tavares MR, Dedivitis RA, França CM, Oliveira BV, Pedruzzi PA. Endoscopia de contato (microestomatoscopia) nas lesões da boca e do lábio: avaliação do método. Rev Col Bras Cir 2008. [DOI: 10.1590/s0100-69912008000600003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVO: Descrever as dificuldades da endoscopia de contato aplicada à boca e ao lábio (microestomatoscopia de contato) e aplicar nas lesões do lábio os critérios usados na endoscopia de contato de outras topografias. MÉTODO: Estudo prospectivo utilizando o endoscópio de contato Storz 8715A e o corante azul de toluidina. Vinte exames foram feitos para aprendizado da técnica e depois mais 31 (21 lesões do lábio e 10 da boca), todos exames in vivo. Os critérios avaliados foram: Celularidade, Arquitetura, Estratificação e Morfologia. RESULTADOS: A falta de nitidez, os tremores finos e o deslizamento do aparelho dificultaram o procedimento em 100% dos casos, mas permitiram um exame adequado. Os 13 diagnósticos de malignidade das lesões do lábio apresentaram todos os critérios alterados. CONCLUSÃO: as dificuldades encontradas foram o contato do aparelho com a superfície anatômica, o deslizamento do aparelho, os tremores finos e a falta de nitidez da imagem, que não inviabilizaram a realização e a interpretação do exame. Os critérios são aplicáveis às lesões da boca e do lábio inferior.
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Affiliation(s)
- Mônica A Lotufo
- Department of Oral Diagnosis, School of Dentistry, Ibirapuera University, São Paulo, Brazil.
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Abstract
Adenoid cystic carcinoma (ACC) is a frequent malignant salivary gland neoplasm presenting different growth patterns described as tubular, cribriform and solid, which represent distinct differentiation stages. Cell lines originated from ACCs grown inside three-dimensional environments have not been capable to reproduce all in vivo ACC growth patterns. As ACC cells in vivo present replicated basement membrane, to mimic this situation in vitro ACC cells (CAC2 cells) were grown on the top of a reconstituted basement membrane (Matrigel). Phenotype differences were assessed by light, fluorescence and transmission electron microscopy. The cultures grown on the top of Matrigel presented three-dimensional arrangement of cells intercepted by cellular cords. At these, cell nests pseudocyst formations were observed. This morphological structure entirely reproduced the cribriform growth pattern of ACC. We suggest that the cribriform differentiation of ACC in culture is dependent of proteins and growth factors associated in a bi-dimensional structure.
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Affiliation(s)
- Márcia M Marques
- Department of Restorative Dentistry, University of São Paulo, São Paulo, Brazil.
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Lopes NNF, Petrilli AS, Caran EMM, França CM, Chilvarquer I, Lederman H. Dental abnormalities in children submitted to antineoplastic therapy. J Dent Child (Chic) 2006; 73:140-5. [PMID: 17367030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
PURPOSE The purpose of this study was to assess, by panoramic radiographs, the prevalence of morphological dental changes in children with cancer who were submitted for chemotherapy alone or concomitant radiotherapy of the head and neck. METHODS All patients admitted between March, 1996 and February, 2004 were analyzed and 137 were included in this retrospective, nonrandomized, institutional study. The rates of microdontia, taurodontia, anodontia, macrodontia, blunt root, and tapered root were assessed. RESULTS The patients were distributed into 2 groups: (1) those with lymphoproliferative neoplasias (61%); and (2) those with solid tumors (39%). Their mean age when treatment began was 5 years and 6 months. Dental abnormalities were found in 39 (29%) patients, while 98 (72%) patients did not present any abnormality. The abnormalities found were: (1) microdontia (7%; N= 10); (2) anodontia (6%; N=8); (3) taurodontia (14%; N=19); (4) macrodontia (5%; N=7); (5) blunted root (2%; N=2); and (6) tapered root (4%; N=5). Of these patients: 22% (N=30) presented 1 abnormality; 4% (N=6) presented 2 abnormalities; and 2% (N=3) presented 3 abnormalities. CONCLUSION Taurodontia was the most frequent abnormality found in children and adolescents who underwent antineoplastic treatment, and its rate was significantly higher than those found for the healthy Brazilian population. This study's results show that it is necessary for the odontologist to systematically research the dental changes that occur among this special group of patients.
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Affiliation(s)
- Nilza N F Lopes
- Diagnostic Department, all at the Pediatric Oncology Institute, GRAACC, Medical School of São Paulo, Federal University of São Paulo, São Paulo, Brazil.
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Dedivitis RA, França CM, Mafra ACB, Guimarães FT, Guimarães AV. Características clínico-epidemiológicas no carcinoma espinocelular de boca e orofaringe. ACTA ACUST UNITED AC 2004. [DOI: 10.1590/s0034-72992004000100006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
O câncer de boca e orofaringe é de comportamento agressivo e, no Brasil, a incidência é considerada uma das mais altas do mundo, sendo o mais comum da região de cabeça e pescoço. OBJETIVO: O objetivo deste trabalho é analisar os aspectos clínico-epidemiológicos dos pacientes e a evolução da doença. FORMA DE ESTUDO: Clínico retrospectivo. CASUÍSTICA E MÉTODO: Foram arrolados 43 casos de carcinoma espinocelular (CEC) de boca e 25 de orofaringe do Serviço de Cirurgia de Cabeça e Pescoço da Santa Casa de Misericórdia de Santos e do Hospital Ana Costa entre os anos de 1997 a 2000. Informações sobre idade, sexo, profissão, raça, hábitos de tabagismo e etilismo, uso de prótese dentária, origem do encaminhamento do paciente ao tratamento, localização da lesão, estadiamento clínico, grau de diferenciação histológica, tratamento, sobrevida e presença de segundo tumor primário foram analisados estatisticamente pelo Teste Exato de Fischer. RESULTADOS: Dos pacientes com CEC em boca, a relação de incidência masculino-feminino foi de 3,35:1, a idade variou de 46 a 91 anos (mediana de 62), 90,7% eram caucasianos, 81% foram referenciados por profissionais médicos, 76,8% eram tabagistas, 74% etilistas, 79% não utilizavam prótese dentária. O sítio mais acometido foi a língua (51,1%), 53% apresentaram-se nos estádios III e IV, 72,1% eram de grau histológico II, 53% foram tratados por cirurgia e 47% por cirurgia e radioterapia adjuvante e 9,3% apresentaram segundo tumor primário. Para a orofaringe, a relação masculino-feminino foi de 11,5:1, com idade entre 40 e 81 anos (mediana de 58), 92% eram caucasianos, 92% foram encaminhados por médicos, 84% eram tabagistas, 80% etilistas, 52% não utilizavam prótese, as tonsilas palatinas foram o sítio mais acometido (76%), 96% estavam em estádios III e IV, 84% eram de grau II, 80% foram tratados por cirurgia associada a radioterapia, 16% a cirurgia para resgate de falha após radioterapia e 4% a cirurgia exclusiva e 8% tiveram segundo primário. Não houve relação estatisticamente significativa entre o estadiamento e os hábitos de tabagismo, etilismo e uso de prótese. Tais hábitos, a faixa etária e o grau histológico não tiveram relação significativa com o sítio do tumor. Estavam vivos e livres de doença 69,7% dos pacientes com tumor de boca e 22% de orofaringe. CONCLUSÃO: O médico ou dentista que dá o atendimento inicial é fundamental no reconhecimento das lesões, para que se possa estabelecer o diagnóstico precoce.
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Abstract
BACKGROUND The neural cell adhesion molecule (N-CAM) has been implicated in the behaviour of the adenoid cystic carcinoma. In vitro, it was demonstrated that N-CAM inhibits cell invasion. The aim of this study was to search for N-CAM in the most common salivary gland tumour that has a malignant counterpart. METHODS We investigated the presence of N-CAM in pleomorphic adenoma and its malignant counterpart, the carcinoma ex-pleomorphic adenoma, using the immunohistochemistry technique. RESULTS Neural cell adhesion molecule was expressed in all cases of pleomorphic adenoma, strongly labelling the luminal cells of the double-layered ductform structures. This expression was weaker in neoplastic myoepithelial cells and progressively diminished at a distance from the luminal cells. In carcinoma, ex-pleomorphic adenoma N-CAM was either totally absent or faintly present at the apical pole of the few luminal cells. CONCLUSIONS As a result of the peculiar distribution of N-CAM in pleomorphic adenoma, we speculated that N-CAM behaves as a tumour-suppressor molecule, which is expressed in the benign neoplasm and which is down-regulated after malignancy, when the tumour assumes an invasive behaviour.
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Affiliation(s)
- E R M Saleh
- School of Dentistry, University of São Paulo, SP, Brazil
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Abstract
Adenoid cystic carcinoma of salivary glands is characterised by aggressive behaviour, high rate of local recurrences, neurotropism and late metastasis. In a previous work we demonstrated that adenoid cystic carcinoma cultured cells (CAC2 cells) expressed N-CAM. It was suggested that this expression, modulated by extracellular matrix, would be correlated to cell movement. The aim of our study was to verify whether CAC2 cells presented invasion capacity. Moreover, we tested whether the neural adhesion molecule (N-CAM) would participate in this process. CAC2 cells were either previously treated, or not (control), with a monoclonal antibody against N-CAM. Invasion assays were carried out using a modified Boyden chamber (Transwell chamber). CAC2 cells (10(5)) were dispensed into Transwell upper chamber on the top of Matrigel coated filter. The cells that invaded the filters in the first 8 h were counted under light microscopy, yielding data for the invasion rates (%). Control CAC2 cells presented an invasion rate of 5.28+/-0.04%. The invasion rate raised to 6.53+/-0.2% when N-CAM was blocked with monoclonal antibody. N-CAM impaired the adenoid cystic carcinoma cell invasion in vitro. Therefore, we suggest an anti-invasive role for N-CAM in adenoid cystic carcinoma.
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Affiliation(s)
- C M França
- Universidade de São Paulo, Faculdade de Odontologia, Disciplina de Patologia Bucal, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo-SP, Brazil
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Abstract
BACKGROUND Graft-vs.-host-disease, or GVHD, is the main cause of morbidity in patients who have received bone marrow transplants. Chronic GVHD, or cGVHD, occurs 100 days or more after the transplant procedure and may take the form of various oral manifestations. CASE DESCRIPTION A 23-year-old woman received an allogeneic bone marrow transplant. Although prophylactic therapy was provided, the patient developed cGVHD. Appropriate therapy was initiated, and it received a good clinical response at all sites affected by cGVHD, except in the oral cavity. The patient received complete symptomatic relief through revised systemic therapy, improved oral hygiene, use of topical medications and a monitored diet. CLINICAL IMPLICATIONS Effective intervention by dentists is an important part of increasing treatment effectiveness and improving quality of life in patients who received bone marrow transplants.
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Affiliation(s)
- C M França
- Department of Oral Pathology, School of Dentistry, Ibirapuera University, São Paulo, Brazil.
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França CM, Jaeger MM, Jaeger RG, Araújo NS. The role of basement membrane proteins on the expression of neural cell adhesion molecule (N-CAM) in an adenoid cystic carcinoma cell line. Oral Oncol 2000; 36:248-52. [PMID: 10745180 DOI: 10.1016/s1368-8375(99)00087-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We investigated the presence of neural cell adhesion molecule (N-CAM) in the adenoid cystic carcinoma cell line CAC2 using immunofluorescence microscopy. Additionally, we analysed the role of laminin and type IV collagen in N-CAM expression. We demonstrated that cultured adenoid cystic carcinoma cells express N-CAM. Control cells presented a scattered N-CAM expression on cell membrane, and type IV collagen had no effect in N-CAM distribution. CAC2 cells grown on laminin-coated coverslips expressed N-CAM concentrated on cell lamellipodia suggesting relationship with migratory activity. Our results showed that cultured adenoid cystic carcinoma cells express N-CAM and this expression is modulated by extracellular matrix.
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Affiliation(s)
- C M França
- Department of Oral Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil
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