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Grandizoli D, Renzo A, Sakae LO, Lopes RM, Zezell DM, Aranha A, Scaramucci T. Assessment of the Ability of Desensitizing and Conventional Mouth Rinses to Promote Dentin Tubule Occlusion. Oper Dent 2022; 47:549-561. [PMID: 36026699 DOI: 10.2341/21-043-l] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2021] [Indexed: 11/23/2022]
Abstract
This study aimed to evaluate the effect of desensitizing and conventional mouth rinses on dentin tubule occlusion. Dentin hypersensitivity was simulated by EDTA application for five minutes. The specimens were randomly allocated into the following groups: desensitizing mouth rinses (Colgate Sensitive, Elmex Sensitive Professional, Listerine Advanced Defense Sensitive, Sensodyne Cool Mint); conventional mouth rinses (Colgate Plax, Elmex Caries Protection, Listerine Anticaries, Sensodyne Pronamel); a negative control (C-: distilled water); and Clinpro XT Varnish was the positive control (C+). Subsequently, the specimens were submitted to an erosive or abrasive challenge (performed separately) and to an erosive/abrasive cycling for five days (n=10 for each challenge). After treatment, challenges, and cycling, the specimens were analyzed in an environmental scanning electron microscope to verify the number of open dentin tubules (ODTs), counted by using Image J software (National Institutes of Health, Bethesda, MD, USA). Data were analyzed by the Kruskal-Wallis, Friedman and Dunn tests, with Bonferroni correction (α=0.05). Groups did not differ at baseline (p>0.05). At the post-treatment, erosion and abrasion stages, C+ was the only group that showed a reduction in ODTs compared to C-(p<0.05). In the other groups, numbers did not differ significantly from C- (p>0.05). After cycling, none of the groups exhibited significant reduction in ODTs other than C- (p>0.05); however, C+, Listerine Anticaries, and Colgate Plax had a lower number of ODTs than Listerine Sensitive and Sensodyne Pronamel. No mouth rinse was able to promote significant occlusion of the dentin tubules after treatment and the challenges. C+ was the only product that effectively promoted tubular occlusion, but this effect did not withstand several erosive and abrasive challenges.
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Affiliation(s)
- Drp Grandizoli
- Diana Roberta Pereira Grandizoli, DDS, MSc, PhD student, University of São Paulo, São Paulo, Brazil
| | - Alm Renzo
- Ana Luisa Meira Renzo, DDS, University of São Paulo, São Paulo, Brazil
| | - L O Sakae
- Leticia Oba Sakae, DDS, MSc, PhD student, University of São Paulo, São Paulo, Brazil
| | - R M Lopes
- Raquel Marianna Lopes, DDS, MSc, PhD, Universidade Ibirapuera, São Paulo, São Paulo, Brazil
| | - D M Zezell
- Denise Maria Zezell, MSc, PhD, Institute for Energy and Nuclear Research IPEN/CNEN, São Paulo, São Paulo, Brazil
| | - Acc Aranha
- Ana Cecilia Correa Aranha, DDS, MSc, PhD, University of São Paulo, São Paulo, Brazil
| | - T Scaramucci
- *Tais Scaramucci, DDS, PhD, University of São Paulo, São Paulo, Brazil
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Ribeiro MES, Lopes RM, Aranha ACC, Medeiros IS, Lima RR, Souza Júnior MHSE, Loretto SC. Is prolonged bleaching more harmful to dental enamel than daily dietary and hygienic oral habits? Braz Oral Res 2021; 35:e113. [PMID: 34816901 DOI: 10.1590/1807-3107bor-2021.vol35.0113] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/24/2021] [Indexed: 11/21/2022] Open
Abstract
The ultrastructural and mechanical properties of enamel surface were evaluated after prolonged bleaching treatments with 10% carbamide peroxide in the presence or absence of orange juice (erosive challenge) and toothbrushing (abrasive challenge). In total, 145 incisor bovine teeth were used in this study. Twenty-five samples were prepared for the ultrastructural evaluations, and 120 samples were prepared for microhardness and roughness tests. These 120 samples were divided into eight experimental groups (n = 15): G1- artificial saliva; G2- abrasion; G3- erosion; G4- dental bleaching; G5- erosion + abrasion; G6- bleaching + abrasion; G7- bleaching + erosion; and G8- bleaching + erosion + abrasion. All groups were tested at T0 (before treatment), T1 (14 days), T2 (21 days), and T3 (28 days). Two-way analysis of variance for repeated measures and the post hoc Sidak tests (p ≤ 0.05) were used. The roughness evaluation demonstrated an increase in damage for all experimental groups with an increase in the time period. For microhardness, the groups exposed to artificial saliva (AS) and abrasive challenge did not show any differences at any time points, while the other groups showed a decrease in microhardness from T0 to T3. Ultrastructural evaluation showed different surface alterations in response to the treatments. Despite prolonged bleaching periods, the procedure caused lesser enamel surface alterations than exposure to orange juice alone or in combination with brushing.
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Affiliation(s)
- Mara Eliane Soares Ribeiro
- Universidade Federal do Pará - UFPA, School of Dentistry, Dental Materials Laboratory, Belém - PA, Brazil
| | - Raquel Marianna Lopes
- Universidade de São Paulo - USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Ana Cecília Corrêa Aranha
- Universidade de São Paulo - USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Igor Studart Medeiros
- Universidade de São Paulo, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Rafael Rodrigues Lima
- Universidade Federal do Pará - UFPA, Institute of Biological Sciences, Laboratory of Functional and Structural Biology, Belém - PA, Brazil
| | | | - Sandro Cordeiro Loretto
- Universidade Federal do Pará - UFPA, School of Dentistry, Dental Materials Laboratory, Belém - PA, Brazil
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Torso VH, Fraga MAA, Lopes RM, Aranha ACC, Correr-Sobrinho L, Correr AB. Charcoal-based dentifrices: Effect on color stability and surface wear of resin composites. J ESTHET RESTOR DENT 2021; 33:815-823. [PMID: 34060712 DOI: 10.1111/jerd.12741] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 09/05/2020] [Revised: 02/26/2021] [Accepted: 04/19/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To evaluate the effect of charcoal-based dentifrices on the color change (CC) and surface wear (SW) of resin composites. MATERIALS AND METHODS Five dentifrices, including three toothpastes: Colgate total-12 (C12), Black is the new White (CPX), and Natural (NAT); and two powders: Carvvo (CVV) and Whitemax (WMX), were evaluated. Composite blocks (5x5x2mm- Z350 3 M/ESPE, shade A2) were subjected to 417 and 5004 brushing cycles. The CC (n = 7, CIEDE2000; ΔE00 ) was evaluated using a spectrophotometer. SW (n = 5) was assessed using profilometry. The dentifrice particles were characterized by scanning electron microscopy (SEM). RESULTS In 417 brushing cycles, resin composite exhibited higher color change upon being exposed to NAT, CVV and WMC than to C12 (p ≤ 0.05). In 5004 brushing cycles, resin composite showed higher color change values when exposed to all dentifrices, except C12 (p ≤ 0.05). The powders promoted higher SW on resin composite than C12 in both evaluation times (p ≤ 0.05). In 417 cycles, WMX caused higher SW on composite than C12, CPX, and NAT (p ≤ 0.05). No significant different SW was found between powders and charcoal-based toothpastes after 5004 brushing cycles (p > 0.05). SEM showed larger particles for powder than for toothpaste dentifrices. CONCLUSION Within the limitations of this study, both null hypotheses have been rejected. Resin composites exposed to charcoal-based dentifrices exhibited significantly (p ≤ 0.05) higher color change and surface wear than conventional toothpastes. CLINICAL SIGNIFICANCE Color change and surface wear shown by charcoal dentifrices may compromise the longevity of restorations.
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Affiliation(s)
- Victor Hugo Torso
- Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
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Lopes RM, Scaramucci T, Walker CL, Feitosa SA, Aranha ACC. In situ evaluation of desensitizing toothpastes for protecting against erosive tooth wear and its characterization. Clin Oral Investig 2021; 25:6857-6870. [PMID: 33977386 DOI: 10.1007/s00784-021-03975-9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 05/03/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE This five-phase, single-blind, crossover in situ trial evaluated the effects of desensitizing or anti-erosive toothpastes on dentin erosive wear and tubule occlusion. MATERIALS AND METHODS Some characteristics such as relative dentin abrasivity (RDA), viscosity (V), cytotoxicity, and fluoride and calcium (Ca) availability of the toothpastes were also tested. Samples were positioned on removable intraoral appliances from 15 volunteers (n=4), according to the groups, C-control (0 ppm fluoride), F-sodium monofluorophosphate (MFP), A-MFP and arginine+calcium carbonate, CSP-calcium sodium phosphosilicate, and CS-MFP and calcium silicate+sodium phosphate. Erosion-abrasion cycling was performed (1% citric acid, 2min, 6×/day; toothbrushing, 5s, 2×/day). Surface loss (SL) was evaluated by optical profilometry. Environmental scanning electron microscopy images (ESEM) counted the number of open dentin tubules (ODTs). Data were statistically analyzed (α=0.05). RESULTS There were no significant differences in SL among groups (p=0.468). The ODT for CSP, CS, and A groups were significantly lower than the control. CSP and CS presented significantly less ODT than F, but they did not significantly differ from A. F and CS were more abrasive than all the other toothpastes; CSP was more abrasive than A, and C was the least abrasive. CSP presented higher V (p<0.05). All toothpastes presented lower cell viability than the control without toothpaste exposure. F and A presented significantly higher values of F- (p<0.05). All fluoride toothpastes had similar amount of Ca, differing from the control (p<0.05). CONCLUSION Although the toothpastes caused similar degree of erosive wear, CSP and CS were able to occlude the dentin tubules. CLINICAL RELEVANCE Desensitizing toothpastes containing calcium, sodium, phosphate, and silicate could be a suitable option for treating dentin hypersensitivity.
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Affiliation(s)
- Raquel Marianna Lopes
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - T Scaramucci
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Clandler L Walker
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, 1121 Michigan Street, Indianapolis, IN, 46202-5186, USA
| | - S A Feitosa
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, 1121 Michigan Street, Indianapolis, IN, 46202-5186, USA
| | - Ana Cecilia Correa Aranha
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, SP, 05508-000, Brazil. .,School of Dentistry, Special Laboratory of Lasers in Dentistry (LELO), University of São Paulo, Avenida Professor Lineu Prestes, 2226 - Cidade Universitária, Butantã, São Paulo, Brazil.
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Maximiano V, Machado AC, Lopes RM, Rabelo FEM, Garófalo SA, Zezell DM, Aranha ACC, Scaramucci T. Association of Nd:YAG laser and calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion. J Appl Oral Sci 2021; 29:e20200736. [PMID: 33825753 PMCID: PMC8011944 DOI: 10.1590/1678-7757-2020-0736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 01/05/2021] [Indexed: 12/03/2022] Open
Abstract
Objective To evaluate the efficacy of Nd:YAG laser associated with calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion after erosive/abrasive challenges. Methodology Dentin specimens were exposed to 17% ethylene diamine tetra-acetic acid (EDTA) solution for 5 min and randomly allocated into five groups: G1, control (no treatment); G2, Nd:YAG laser (1 W, 10 Hz, 100 mJ, 85 J/cm2); G3, Laser + TeethmateTM Desensitizer; G4, Laser + Desensibilize Nano P; and G5, Laser+Nupro®. Specimens underwent a 5-day erosion-abrasion cycling. Hydraulic conductance was measured post-EDTA, post-treatment, and post-cycling. Post-treatment and post-cycling permeability (%Lp) was calculated based on post-EDTA measurements, considered 100%. Open dentin tubules (ODT) were calculated at the abovementioned experimental moments using scanning electron microscopy and ImageJ software (n=10). Data were analyzed using two-way repeated measures ANOVA and Tukey’s test (α=0.05). Results G1 presented the highest %Lp post-treatment of all groups (p<0.05), without significantly differences among them. At post-cycling, %Lp significantly decreased in G1, showed no significant differences from post-treatment in G3 and G4, and increased in G2 and G5, without significant differences from G1 (p>0.05). We found no significant differences in ODT among groups (p>0.05) post-EDTA. At post-treatment, treated groups did not differ from each other, but presented lower ODT than G1 (p<0.001). As for post-cycling, we verified no differences among groups (p>0.05), although ODT was significantly lower for all groups when compared to post-EDTA values (p<0.001). Conclusion All treatments effectively reduced dentin permeability and promoted tubule occlusion after application. Combining Nd YAG laser with calcium-phosphate pastes did not improve the laser effect. After erosive-abrasive challenges, treatments presented no differences when compared to the control.
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Affiliation(s)
- Vinícius Maximiano
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Dentística, São Paulo, SP, Brasil
| | - Alana Cristina Machado
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Dentística, São Paulo, SP, Brasil
| | - Raquel Marianna Lopes
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Dentística, São Paulo, SP, Brasil
| | | | | | - Denise Maria Zezell
- Universidade de São Paulo, Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEM), São Paulo, SP, Brasil
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Viana ÍEL, Lopes RM, Silva FRO, Lima NB, Aranha ACC, Feitosa S, Scaramucci T. Novel fluoride and stannous -functionalized β-tricalcium phosphate nanoparticles for the management of dental erosion. J Dent 2019; 92:103263. [PMID: 31838138 DOI: 10.1016/j.jdent.2019.103263] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 10/23/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE To evaluate the anti-erosive effect of solutions containing β-tricalcium phosphate (β-TCP) nanoparticles functionalized with fluoride or with fluoride plus stannous on enamel and dentin. METHODS β-TCP nanoparticles were synthesized and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Sixty enamel and dentin specimens were randomly allocated into the groups (n = 10): Control (water); F (NaF, 225 ppm F-); F + Sn (NaF + SnCl2, 800 ppm Sn2+); F+β-TCP (F+40 ppm β-TCP); F + Sn+β-TCP (F + Sn+40 ppm β-TCP); F + Sn+100β-TCP (F + Sn+100 ppm β-TCP). Specimens underwent erosion-remineralization cycling (5 min immersion into 1 % citric acid solution and 60 min exposure to artificial saliva, 4×/day, 5 days). Immersion in the test solutions was performed for 2 min, 2×/day. Surface loss (SL, in μm) was determined by optical profilometry at the end of cycling. Data were analyzed using one way-ANOVA and Tukey's tests (α = 0.05). RESULTS XRD confirmed the β-TCP phase. TEM micrographs showed differences between the bare nanoparticle and the β-TCP functionalized with F and Sn. All enamel groups presented lower SL than the control, with F + Sn, F + Sn+β-TCP, and F + Sn+100β-TCP showing the lowest values. For dentin, all the groups had lower SL than the control. F+β-TCP presented the lowest SL, significantly differing from all the other groups. CONCLUSION β-TCP nanoparticles functionalized with fluoride showed improved anti-erosive effect compared to the fluoride solution on dentin. There was no significant effect of the β-TCP nanoparticles functionalized with fluoride plus stannous in both substrates. CLINICAL RELEVANCE β-TCP nanoparticles are a promising agent to be added to oral health products to improve the protective effect of fluoride against dentin erosion.
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Affiliation(s)
- Ítallo Emídio Lira Viana
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
| | - Raquel Marianna Lopes
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
| | - Flávia Rodrigues Oliveira Silva
- Nuclear and Energy Research Institute (IPEN-CNEN), Material Science and Technology Center, Av. Prof. Lineu Prestes 2242, São Paulo, SP, 05508-000, Brazil.
| | - Nelson Batista Lima
- Nuclear and Energy Research Institute (IPEN-CNEN), Material Science and Technology Center, Av. Prof. Lineu Prestes 2242, São Paulo, SP, 05508-000, Brazil.
| | - Ana Cecília Corrêa Aranha
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
| | - Sabrina Feitosa
- Clinical Assistant Professor, Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, 1121 Michigan Street, Indianapolis, IN, 46202-5186, United States.
| | - Taís Scaramucci
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
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Machado AC, Rabelo FEM, Maximiano V, Lopes RM, Aranha ACC, Scaramucci T. Effect of in-office desensitizers containing calcium and phosphate on dentin permeability and tubule occlusion. J Dent 2019; 86:53-59. [DOI: 10.1016/j.jdent.2019.05.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 05/17/2019] [Accepted: 05/20/2019] [Indexed: 11/24/2022] Open
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Hauser-Davis RA, Lopes RM, Ziolli RL. Inihibition of mullet (M. liza) brain acetylcholinesterase activity by in vitro polycyclic aromatic hydrocarbon exposure. Mar Pollut Bull 2019; 140:30-34. [PMID: 30803647 DOI: 10.1016/j.marpolbul.2019.01.027] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/13/2019] [Accepted: 01/14/2019] [Indexed: 06/09/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAH) have been reported as acetylcholinesterase (AChE) inibitors, although in vitro studies on PAH effects on AChE activity are scarce and have only been performed using electric eel brain extracts. Thus, this study investigated PAH effects on brain AChE activity in a tropical fish species in Southeastern Brazil, mullet (Mugil liza). Mullet specimens were obtained from Guanabara Bay (N = 20), Rio de Janeiro, Brazil. Brain AChE was extracted and exposed to an environmentally relevant concentration of Pyrene, Chrysene, Phenanthrene, and Naphthalene, and PAH metabolites, 2-Naphthol and 1-OH-Pyrene. AChE activity inhibition was observed, although no difference was observed between high- and low- molecular weight PAH. 2-Naphthol was a less potent AChE inhibitor than Naphthalene, albeit non-significantly. Further studies are required, since only one PAH concentration was used herein. Mullet brain extracts seem to be adequate to assess possible neurotoxic PAH effects on fish AChE.
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Affiliation(s)
- R A Hauser-Davis
- Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.
| | - R M Lopes
- Laboratório de Comunicação Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - R L Ziolli
- Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, RJ, Brazil
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João-Souza SH, Machado AC, Lopes RM, Zezell DM, Scaramucci T, Aranha ACC. Effectiveness and acid/tooth brushing resistance of in-office desensitizing treatments—A hydraulic conductance study. Arch Oral Biol 2018; 96:130-136. [DOI: 10.1016/j.archoralbio.2018.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/13/2018] [Accepted: 09/09/2018] [Indexed: 11/26/2022]
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Bezerra SJC, Trevisan LR, Viana IEL, Lopes RM, Pereira DL, Aranha ACC, Scaramucci T. Er,Cr:YSGG laser associated with acidulated phosphate fluoride gel (1.23% F) for prevention and control of dentin erosion progression. Lasers Med Sci 2018; 34:449-455. [PMID: 30215185 DOI: 10.1007/s10103-018-2609-3] [Citation(s) in RCA: 3] [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: 03/27/2018] [Accepted: 08/03/2018] [Indexed: 10/28/2022]
Abstract
To evaluate the effect of Er,Cr:YSGG laser, associated with fluoride application, on the prevention/control of dentin erosion. Dentin slabs were embedded in acrylic resin, flattened, and polished. Half of the specimens were previously eroded (10 min immersion in 1% citric acid solution) and half were kept sound. The specimens (n = 10 each substrate) were randomly allocated into the experimental groups, according to the following treatments: control (no treatment); APF gel (1.23% F, 1 min); Er,Cr:YSGG laser irradiation (P1: 0.25 W, 20 Hz, 2.8 J/cm2, tip S75, beam diameter of 750 μm, 1 mm away from the surface); Er,Cr:YSGG laser irradiation (P2: 0.50 W, 20 Hz, 5.7 J/cm2, tip S75, beam diameter of 750 μm, 1 mm away from the surface); APF gel + Er,Cr:YSGG laser P1 and; APF gel + Er,Cr:YSGG laser P2. Afterwards, the specimens underwent an erosion-remineralization cycling, consisting of a 5-min immersion into 0.3% citric acid, followed by 60-min exposure to artificial saliva. This procedure was repeated 4×/day, for 5 days. Surface loss (SL, in μm) was determined by optical profilometry. Specimens from each group were analyzed by environmental scanning electron microscopy (n = 3). Data were statistically analyzed (α = 0.05). For the eroded specimens, APF gel presented the lowest SL, being different from the control. For the sound specimens, none of the groups differed from the control, except for Er,Cr:YSGG laser P2, which presented the highest SL. When substrates were compared, only the eroded specimens of the control and APF + Er,Cr:YSGG laser P1 Groups showed higher SL. Selective structure removal was observed for the laser-treated groups. None of the Er,Cr:YSGG laser parameters were effective in the prevention/control dentin erosion. The laser was also unable to enhance the protection of fluoride against dentin erosion.
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Affiliation(s)
- S J C Bezerra
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - L R Trevisan
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - I E L Viana
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - R M Lopes
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - D L Pereira
- Institute of Energetic and Nuclear Research, IPEN/CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP, 05508-000, Brazil
| | - A C C Aranha
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.,Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - Taís Scaramucci
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
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Coimbra RSC, Mascarenhas MS, Saraiva VB, Santos CR, Lopes RM, Hauser-Davis RA, Oliveira VPS, Molisani MM, Almeida MG, Rezende CE, Carvalho CEV, Oliveira MM. Metal loads and biomarker suite responses in a tropical carnivorous fish indicative of anthropogenic impacts in a Southeastern Brazilian lagoon. Environ Monit Assess 2018; 190:564. [PMID: 30167796 DOI: 10.1007/s10661-018-6910-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Tropical coastal lagoons are highly productive environments exhibiting high biodiversity. However, the use of these ecosystems by local communities is of concern, since this generally leads to environmental degradation. The Imboassica coastal lagoon, located in Macaé city, in Northern Rio de Janeiro, is an important ecosystem in the state, however, already displaying signs of anthropogenic impacts. Carnivorous fish Hoplias malabaricus specimens were sampled from this impacted site, as well as from a reference area. Fish from Imboassica Lagoon presented lower condition factor, lower cholinesterase activity, and higher percentage of erythrocyte micronuclei when compared to fish from the reference site. Metals in fish from Imboassica Lagoon were always higher than Encantada Lagoon, with some seasonal differences, where some metals were higher in the rainy season compared to the dry season in muscle tissue, with the exception of Cu, Fe, Sr, and Zn; and in the liver, except for Ba, Cd, Cr, Ni, and Sr. Cr and Mn in the edible muscle portion of the fish were higher than the limits established by Brazilian and International legislations as permissible for human consumption, thus leading to concerns regarding public health risks for the local population that use fish as their main protein source.
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Affiliation(s)
- R S C Coimbra
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - M S Mascarenhas
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - V B Saraiva
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - C R Santos
- Departamento de Bioquímica - Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - R M Lopes
- Laboratório de Comunicação Celular, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - R A Hauser-Davis
- Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - V P S Oliveira
- Polo de Inovação, UPEA/Instituto Federal Fluminense, Campos dos Goytacazes, RJ, Brazil
| | - M M Molisani
- Núcleo de Ecologia e de Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro (UFRJ), Macaé, RJ, Brazil
| | - M G Almeida
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - C E Rezende
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - C E V Carvalho
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - M M Oliveira
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil.
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Lopes RM, Scaramucci T, Aranha ACC. Effect of desensitizing toothpastes on dentin erosive wear and tubule occlusion. An in situ study. Am J Dent 2018; 31:177-183. [PMID: 30106532] [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: 06/08/2023]
Abstract
PURPOSE To evaluate the effect of desensitizing dentifrices on dentin wear and tubule occlusion using a three-phase, single blind, crossover in situ trial. METHODS The dentifrices containing Arginine and calcium carbonate (1,450 ppmF) and Novamin, (~1,426 ppmF) were tested in two conditions: A: abrasion and B: erosion/abrasion. A dentifrice without desensitizing agents was used as control (1,450 ppmF). In each study phase, 10 volunteers used intra-oral appliances containing dentin specimens (pre-treated with EDTA, to simulate hypersensitive dentin), which were either submitted to erosion with a cola-like drink (pH 2.6), 4×/day (2 minutes), followed by toothbrushing, using electric toothbrushes, with standard pressure (2×/ day, 5 seconds), or toothbrushing only. Dentin surface loss (SL, in µm) was determined with optical profilometry at the 3rd and 5th days of cycling. Dentin surface was analyzed with environmental scanning electron microscopy (ESEM), post EDTA and post cycling, and the dentin tubules were counted using Image J software. Data were statistically analyzed (α= 0.05). RESULTS For condition A and B, there were no significant differences in SL among toothpastes in both experimental times. There were also no significant differences between times within groups. For ESEM, in A, Toothpaste with Novamin was the only dentifrice that showed significantly less opened tubules post cycling than post EDTA. In B, Toothpaste with Novamin and control toothpaste presented less opened tubules post cycling. In conclusion, toothbrushing with the tested dentifrices promoted similar levels of dentin loss; however, for tubule occlusion, the toothpaste with Novamin was the only toothpaste effective for both conditions, abrasion and erosion/abrasion. CLINICAL SIGNIFICANCE Ideally, desensitizing dentifrices should promote obliteration of the dentin tubules or nerve desensitization, without further contributing to the progression of dentin wear.
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Affiliation(s)
- Raquel Marianna Lopes
- Department of Restorative Dentistry; School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Tais Scaramucci
- Department of Restorative Dentistry; School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Ana Cecilia Corrêa Aranha
- Department of Restorative Dentistry; School of Dentistry, University of São Paulo, São Paulo, Brazil,
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Lopes RM, Trevelin LT, da Cunha SRB, de Oliveira RF, de Andrade Salgado DMR, de Freitas PM, de Paula Eduardo C, Aranha ACC. Dental Adhesion to Erbium-Lased Tooth Structure: A Review of the Literature. Photomed Laser Surg 2016. [PMID: 26226169 DOI: 10.1089/pho.2015.3892] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE The aim of the present study was to conduct a review of the literature about adhesion on erbium laser prepared cavities, related to the specific conditions of the irradiated dentin substrate and the effects on bond strength values. BACKGROUND DATA Advances in adhesive restorative techniques significantly influenced modern restorative dentistry. The concept of "minimally invasive dentistry" aims to perform more conservative treatment of cavities in which the removal of sound dentin is no longer necessary. This approach, which relies on the concept of adhesion of restorative materials to the mineralized dental tissues, is considered to be a contemporary outcome in dentistry. Similarly, laser technology in restorative dentistry opened new possibilities and strategies as alternatives to conventional treatment. Considering the clinical aspects of the use of erbium lasers for caries removal, cavity preparations, and substrate conditioning, treatment with lasers can be considered to be an efficient technique with wide acceptance by patients. METHODS Computerized and manual searches were conducted for studies through 2015 that addressed the topic. RESULTS According to the literature, there is no defined standard protocol concerning the information that articles must provide, making a definitive protocol very difficult to establish. Data varied from the type of adhesive and resin composite used, substrate, and parameters (power, energy density, pulse duration, irradiation time, distance, cooling system) to the bond strength test methodology used. CONCLUSIONS Further studies are necessary in order to define a standard protocol with positive results and higher bond strength values when using erbium lasers. Detailed information concerning laser parameters should be implemented. Also, longitudinal clinical studies should be developed in the search for new parameters that behave favorably in the irradiated substrate.
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Affiliation(s)
- Raquel Marianna Lopes
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Lívia Tosi Trevelin
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Sandra Ribeiro Barros da Cunha
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Renata Ferreira de Oliveira
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | | | - Patrícia Moreira de Freitas
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Carlos de Paula Eduardo
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Ana Cecília Corrêa Aranha
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry of the University of São Paulo (USP) , São Paulo, SP, Brazil
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Lopes RM, Turbino ML, Zezell DM, Scaramucci T, Aranha ACC. The effect of desensitizing dentifrices on dentin wear and tubule occlusion. Am J Dent 2015; 28:297-302. [PMID: 26714348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE To evaluate the effect of desensitizing dentifrices on dentin erosive wear, using a 5-day erosion-abrasion-remineralization cycling model. The effect of the dentifrices on dentin's tubule occlusion was also investigated. METHODS 30 samples of root dentin were randomly divided into three groups (n = 10): (1) Colgate Total 12 Clean Mint (control, 1,450 ppm F); (2) Colgate Sensitive Pro-Relief (1,450 ppm F, Pro-Argin); and (3) Sensodyne Repair&Protect (1,450 ppm F, Novamin). Erosion was performed with a cola drink, for 5 minutes, 4x/day. Toothbrushing with the slurry dentifrices (1:2) was performed 2x/day, with electric toothbrushes, using standard pressure for 15 seconds. Surface loss (SL) was determined with optical profilometry at baseline and after the first, third and fifth days of cycling. Before treatment and in the end of the cycling, the amount of opened dentin tubules per area was evaluated in three randomly selected specimens from each group, by environmental scanning electron microscopy. The relative dentin abrasitivity (RDA) of the dentifrices was also measured. Data were statistically analyzed (α = 0.05). RESULTS All the dentifrices showed a progressive increase in SL over time. However, no significant differences in SL among the dentifrices were observed at any time studied. Sensodyne Repair&Protect significantly reduced the number of opened dentin tubules when compared to the other groups. Colgate Total 12 Clean Mint showed the highest RDA, followed by Sensodyne Repair&Protect and then by Colgate Sensitive Pro-Relief. The desensitizing dentifrices tested produced a similar rate of erosive dentin wear to the conventional dentifrice; however, only Sensodyne Repair&Protect was able to promote tubule occlusion.
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Silva EJNL, Carapiá MF, Lopes RM, Belladonna FG, Senna PM, Souza EM, De-Deus G. Comparison of apically extruded debris after large apical preparations by full-sequence rotary and single-file reciprocating systems. Int Endod J 2015; 49:700-5. [PMID: 26174577 DOI: 10.1111/iej.12503] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [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: 05/06/2015] [Accepted: 07/07/2015] [Indexed: 11/27/2022]
Abstract
AIM To evaluate the amount of apically extruded debris produced by ProTaper Universal (PTU), ProTaper Next (PTN), WaveOne (WO) and Reciproc (R) systems after large apical preparations. METHODOLOGY Sixty mandibular premolars with a single canal were selected and randomly assigned into 4 groups (n = 15) according to the system used for root canal preparation: PTU, PTN, WO and R groups. Canal preparations were performed up to size 40 in each group. Distilled water was used as an irrigant, and the apically extruded debris from each tooth was collected in pre-weighted glass vials and dried. The average weight of debris was assessed using a microbalance, and the data were analysed statistically using one-way analysis of variance and the post hoc Tukey multiple comparison test (α = 0.05). RESULTS The PTU system was associated with significantly more debris than the other systems (P < 0.05). No significant differences were found between PTN, WO and R systems (P > 0.05). CONCLUSIONS All systems were associated with apical debris extrusion when canals were prepared to a large apical size. The PTU system was associated with more debris extrusion.
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Affiliation(s)
- E J N L Silva
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Duque de Caxias, Rio de Janeiro, Brazil
| | - M F Carapiá
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Duque de Caxias, Rio de Janeiro, Brazil
| | - R M Lopes
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Duque de Caxias, Rio de Janeiro, Brazil
| | - F G Belladonna
- Department of Endodontics, Fluminense Federal University (UFF), Niterói, Rio de Janeiro, Brazil
| | - P M Senna
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Duque de Caxias, Rio de Janeiro, Brazil
| | - E M Souza
- Department of Dentistry II, Federal University of Maranhão (UFMA), São Luís, Maranhão, Brazil
| | - G De-Deus
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Duque de Caxias, Rio de Janeiro, Brazil
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Lopes RM, Gaspar MM, Pereira J, Eleutério CV, Carvalheiro M, Almeida AJ, Cruz MEM. Liposomes versus lipid nanoparticles: comparative study of lipid-based systems as oryzalin carriers for the treatment of leishmaniasis. J Biomed Nanotechnol 2015; 10:3647-57. [PMID: 26000378 DOI: 10.1166/jbn.2014.1874] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Main-stay in treatment of leishmaniasis relies on chemotherapy but none of the current drugs combines high activity and low toxicity at affordable costs. Dinitroanilines are a new class of drugs with proved in vitro antileishmanial activity. However the development of their pharmaceutical formulations has been compromised by low water solubility and low accumulation in diseased organs. These limitations can be overcome by incorporation in lipid-based nanoformulations such as liposomes and solid lipid nanoparticles. In previous work this strategy was already followed with the incorporation of a dinitroaniline, oryzalin, resulting in the improvement of the biodistribution profile. The present work aims at demonstrating the in vitro and in vivo therapeutic activity of these oryzalin nanoformulations, and establishing a systematic comparison of both systems. After oryzalin incorporation suitable physicochemical properties for parenteral administration were obtained. Nanoformulations revealed reduced cytotoxicity and haemolytic activity when compared with free-oryzalin, while retaining the in vitro intracellular activity. Therapeutic activity, assessed in a murine model of visceral leishmaniasis, was evaluated in terms of number of administrations, dose-response and influence of the lipid excipient. Results demonstrate the superiority of both oryzalin nanoformulations on the reduction of parasitic burden in liver and spleen as compared to the control group (84 to 91%) and similar to Glucantime. A strong reduction in ED50 values (3 to 65 fold) as compared to free-oryzalin was also obtained, depending on the organ and nanoformulation used. Both oryzalin nanoformulations are potential candidates as therapeutic agents against visceral leishmaniasis.
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Lopes RM, Domingues GG, Junqueira SR, Araujo MED, Frias AC. Conditional factors for untreated caries in 12-year-old children in the city of Sao Paulo. Braz Oral Res 2013; 27:376-81. [DOI: 10.1590/s1806-83242013000400008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 05/14/2013] [Indexed: 11/22/2022] Open
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Simões SI, Delgado TC, Lopes RM, Jesus S, Ferreira AA, Morais JA, Cruz MEM, Corvo ML, Martins MBF. Developments in the rat adjuvant arthritis model and its use in therapeutic evaluation of novel non-invasive treatment by SOD in Transfersomes. J Control Release 2005; 103:419-34. [PMID: 15763624 DOI: 10.1016/j.jconrel.2004.12.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2004] [Revised: 12/03/2004] [Accepted: 12/13/2004] [Indexed: 01/22/2023]
Abstract
The aim of this study was firstly to refine a rat model of arthritis, the adjuvant arthritis (AA) model, by studying the time course of the disease, introducing new evaluation methods such as haematological and biochemical parameters in order to identify the main stages of the disease. An optimisation of treatment schedule and evaluation criteria was developed. This refinement provided novel non-invasive anti-inflammatory treatment of the AA with SOD by using mixed lipid vesicles specially developed for transdermal delivery, Transfersomes (Tfs), this being the second major aim. The time course of AA includes a first stage: 1 day after the disease induction, the induced paw volume more than doubled and the paw circumference increased by approx. 50%. Two weeks later, another stage occurred where the disease shifted from the local arthritis form towards polyarthritis: an additional increase of volume and circumference of the induced and non-induced paws, occurred. The animals also started to loose weight around day 14 after the disease induction. Radiographic observable lesions increased correspondingly. Treatment of animals, started at day 1 after induction, by epicutaneous application of SOD-Tfs showed that 1 mg SOD/kg body weight is more efficient than 0.66 mg SOD /kg body weight. As a positive control, SOD liposomes intravenously injected were used for comparison and confirmed the biological efficiency of epicutaneously applied SOD in Tfs. SOD solution and empty Tfs epicutaneously applied exerted no effect. In addition, epicutaneous application of SOD-Tfs used prophylactically was able to suppress the induced rat paw oedema. Radiographic images showed less joint lesions in SOD-Tfs treated animals in comparison with control and placebo treated rats. It was shown for the first time that SOD incorporated into Tfs and applied onto a skin area not necessarily close to the inflamed tissue is able to promote non-invasive treatment of induced arthritis.
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Affiliation(s)
- S I Simões
- Unidade de Novas Formas de Agentes Bioactivos, Departamento de Biotecnologia, Instituto Nacional de Engenharia, Tecnologia e Inovação, Edifício F, Estrada do Paço do Lumiar, 22 1649-038 Lisboa, Portugal.
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Abstract
Many pharmaceutical agents have been discovered by screening natural products from plants, animals, marine organisms and microorganisms. Vincristine, irinotecan, etoposide and paclitaxel are examples of plant-derived compounds that are being employed in cancer treatment, and dactinomycin, bleomycin and doxorubicin are anticancer agents derived from microbial sources. Citarabine is an example of an anticancer agent originating from a marine source. Other agents originating from marine sources are bryostatin-1, aplidine, dolastatin 10 and ET-743, which have recently entered phase I and II clinical trials.
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Affiliation(s)
- A B da Rocha
- Comprehensive Cancer Center, The Lutheran University of Brazil, Canoas, RS
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