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Pelá VT, Gironda CC, Taira EA, Brito L, Pieretti JC, Seabra AB, Cardoso CDAB, Rodrigues MC, Henrique-Silva F, Buzalaf MAR. Different vehicles containing CaneCPI-5 reduce erosive dentin wear in situ. Clin Oral Investig 2023; 27:5559-5568. [PMID: 37481640 DOI: 10.1007/s00784-023-05175-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 07/15/2023] [Indexed: 07/24/2023]
Abstract
OBJECTIVE This study evaluated the protective capacity of a sugarcane-derived cystatin (CaneCPI-5) in different vehicles (1-solution and 2-chitosan gel) against erosive dentin wear in situ. METHODS In part-1, 15 volunteers participated in a crossover protocol (solutions): Water; Elmex™ and CaneCPI-5. The volunteers wore an appliance with 4 dentin samples for 5 days. These samples were treated with a drop of the solutions for 1 min (4X/d), then the acquired pellicle (AP) was formed and the samples were subjected to erosive challenges (EROSION: citric acid, for 90 s, 4X/day). 2X/day, half of the samples were also abraded for 15 s (ABRASION). In part-2, 16 volunteers participated in a crossover protocol (gel): No gel, Chitosan gel, Chitosan gel + NaF and Chitosan gel + CaneCPI-5. The volunteers also wore an appliance. The samples were treated once/day with the gel or not for 4 min, then the AP was formed and the samples were subjected to erosive and abrasive challenges, as reported in part-1. Dentin wear was measured by profilometry. Data were analyzed by two-way RM-ANOVA and Sidak's tests (p < 0.05). RESULTS Part-1: Elmex™ and CaneCPI-5 significantly reduced dentin loss in comparison with Water for the EROSION/ABRASION conditions (p < 0.05). Part-2, all the treated groups significantly reduced the dentin loss in comparison to the No gel. The greatest reduction was found for the gel + CaneCPI-5 group for the EROSION/ABRASION (p < 0.05). CONCLUSION The solution and chitosan gel containing CaneCPI-5 protected against erosive dentin wear in situ. CLINICAL RELEVANCE These different vehicles are probably sufficient for protecting people with high risk of developing erosive dentin wear.
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Affiliation(s)
- Vinicius Taioqui Pelá
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Carlos Condarco Gironda
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Even Akemi Taira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Leonardo Brito
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Joana Claudio Pieretti
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, 09210-580, Brazil
| | - Amedea Barozzi Seabra
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, 09210-580, Brazil
| | | | | | - Flavio Henrique-Silva
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, 13565-905, Brazil
| | - Marília Afonso Rabelo Buzalaf
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil.
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Campos AL, Fronza BM, Rodrigues MC, Souza Chiari MDE, Braga RR. Influence of the calcium orthophosphate:glass ratio and calcium orthophosphate functionalization on the degree of conversion and mechanical properties of resin-based composites. J Biomed Mater Res B Appl Biomater 2023; 111:95-102. [PMID: 35851987 DOI: 10.1002/jbm.b.35136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 06/27/2022] [Accepted: 07/07/2022] [Indexed: 11/07/2022]
Abstract
The study verified the influence of calcium orthophosphate (CaP):glass ratio on the degree of conversion and mechanical properties of resin-based composites containing either TEGDMA-functionalized dicalcium phosphate anhydrous (DCPA) or non-functionalized DCPA particles. The null hypotheses were that the evaluated variables are not affected by (1) CaP:glass ratio or (2) DCPA functionalization. DCPA particles were synthesized and half of them were functionalized with TEGDMA. Particle characterization included x-ray diffraction, elemental analysis, laser scattering, helium picnometry and scanning electron microscopy. Two series of composites were prepared containing either DCPA-NF (non-functionalized) or DCPA-F (functionalized), with total inorganic content of 50 vol % and DCPA:silanized barium glass (BG) ratios from 10:40 to 50:0. A composite containing 50 vol % BG was tested as control. DC was determined using FTIR spectroscopy. Biaxial flexural strength and modulus were tested after 24 h in water. Data were analyzed using Kruskal-Wallis/Dunn (flexural properties) or analysis of variance/Tukey tests (DC). Materials with similar actual DCPA contents were compared using Student's t test (alpha: 0.05). DC was higher for materials with DCPA-F, except for the 10:40 ratio. DCPA-F resulted in higher strength than DCPA-NF only at 40:10 ratio. Modulus was not affected by functionalization. Materials with similar actual DCPA contents showed differences in DC (F > NF), while no difference in flexural properties was observed between materials with 28%-30% DCPA. Both null hypotheses were rejected.
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Affiliation(s)
- Amanda Lopes Campos
- Department of Biomaterials and Oral Biology, University of São Paulo, School of Dentistry, São Paulo, Brazil
| | - Bruna Marin Fronza
- Department of Biomaterials and Oral Biology, University of São Paulo, School of Dentistry, São Paulo, Brazil
| | | | | | - Roberto Ruggiero Braga
- Department of Biomaterials and Oral Biology, University of São Paulo, School of Dentistry, São Paulo, Brazil
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Pelá VT, Brito L, Taira EA, Henrique-Silva F, Pieretti JC, Seabra AB, de Almeida Baldini Cardoso C, de Souza EP, Groisman S, Rodrigues MC, Lussi A, Carvalho TS, Buzalaf MAR. Preventive effect of chitosan gel containing CaneCPI-5 against enamel erosive wear in situ. Clin Oral Investig 2022; 26:6511-6519. [PMID: 35829772 DOI: 10.1007/s00784-022-04600-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 06/20/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study evaluated the preventive effect of a chitosan gel containing CaneCPI-5 against enamel erosion and erosion + abrasion in situ. METHODS Sixteen volunteers participated in a crossover, double-blind protocol, comprising 4 phases: (1) no treatment (Nt); (2) chitosan gel (Cg); (3) chitosan gel + 12,300 ppm NaF (Cg + NaF); and (4) chitosan gel + 0.1 mg/mL CaneCPI-5 (Cg + Cane). Volunteers wore an appliance containing 4 specimens. Once/day, they applied the gel (except for Nt) (4 min/specimen). Erosive challenges were performed extra-orally (0.1% citric acid, 90 s, 4 × /day; ERO). Specimens were also abraded (toothbrush, 15 s/specimen, 2 × /day; ERO + ABR). Enamel wear was assessed by profilometry and relative surface reflection intensity (%SRI). Two-way RM-ANOVA/Sidak's tests and Spearman's correlation were used (p < 0.05). RESULTS For profilometry, ERO + ABR promoted significantly greater wear when compared with ERO. There was a significant difference among all treatments. The lowest enamel loss occurred for Cg + Cane, followed by Cg + NaF, Cg, and Nt (p < 0.05). The %SRI was significantly lower for ERO + ABR when compared to ERO, only for the Nt group. The greatest %SRI was found for the Cg + NaF and Cg + Cane groups, which did not differ significantly, regardless of the conditions. The lowest %SRI was found for the Nt and Cg groups, which did not differ from each other, regardless of the conditions. The Nt group did not differ significantly from the Cg + NaF (ERO). There was a significant correlation between both analyses. CONCLUSION The incorporation of CaneCPI-5 in the chitosan gel prevented erosive wear in situ. CLINICAL RELEVANCE These results open a new perspective for the use of CaneCPI-5 in other application vehicles, such as chitosan gel.
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Affiliation(s)
- Vinícius Taioqui Pelá
- Department of Genetics and Evolution, São Carlos Federal University, São Carlos, São Paulo, Brazil
| | - Leonardo Brito
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Even Akemi Taira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Flávio Henrique-Silva
- Department of Genetics and Evolution, São Carlos Federal University, São Carlos, São Paulo, Brazil
| | - Joana Claudio Pieretti
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo, Brazil
| | - Amedea Barozzi Seabra
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo, Brazil
| | | | - Eduardo Pereira de Souza
- Department of Genetics and Evolution, São Carlos Federal University, São Carlos, São Paulo, Brazil
| | - Sonia Groisman
- Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Adrian Lussi
- Department of Operative Dentistry and Periodontology, University Medical Centre, Freiburg, Germany
| | - Thiago Saads Carvalho
- Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
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Aguiar RCDO, Nunes LP, Batista ES, Viana MM, Rodrigues MC, Bueno-Silva B, Roscoe MG. Experimental composite containing silicon dioxide-coated silver nanoparticles for orthodontic bonding: Antimicrobial activity and shear bond strength. Dental Press J Orthod 2022; 27:e222116. [PMID: 35792792 PMCID: PMC9255988 DOI: 10.1590/2177-6709.27.3.e222116.oar] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 01/09/2021] [Accepted: 05/08/2021] [Indexed: 11/22/2022] Open
Abstract
Objective: This study aimed to investigate the antimicrobial activity and shear bond strength (SBS) of orthodontic brackets to bovine enamel using experimental composites with different concentrations of silicon dioxide-coated silver nanoparticles (Ag@SiO2 NPs). Methods: Fifty bovine incisors were divided into five groups according to the composite (n = 10): G1 - Control Group (Transbond XT Resin), G2 - Experimental composite without Ag@SiO2 NPs; G3 - Experimental composite with 0.5% of Ag@SiO2 NPs; G4 - Experimental composite with 1% of Ag@SiO2 NPs; G5 - Experimental composite with 3% of Ag@SiO2 NPs. The SBS test was performed using a universal mechanical testing machine, and the adhesive remnant index (ARI) was analyzed by optical microscopy. For the antimicrobial activity evaluation, Streptococcus mutans (S. mutans) biofilm was formed for three days in hydroxyapatite discs. Posteriorly, S. mutans colony forming units (CFU) were evaluated. For SBS analysis, Analysis of Variance was used, followed by the Tukey test, at a 5% statistical significance level. The CFU data were analyzed by Kruskal-Wallis, followed by Dunn as a post-hoc test. The ARI results were analyzed descriptively. Results: There was no statistically significant difference in SBS values between the experimental and control groups (p>0.05). A 3% incorporation of Ag@SiO2 NPs statistically reduced the SBS values (p<0.05) compared to the 1% group. The addition of 3% of Ag@SiO2 NPs to the composites significantly reduced S. mutans biofilm formation, compared to group G2 (p<0.05). Conclusion: Composites incorporating 3% of Ag@SiO2 NPs presented similar SBS values compared to the control group, and showed significant antimicrobial activity.
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Affiliation(s)
| | - Larissa Pereira Nunes
- Universidade Estadual de São Paulo (UNESP), Departamento de Medicina Dentária Preventiva e Restaurativa, Faculdade de Odontologia (Araçatuba/SP, Brazil)
| | | | - Marina Mariante Viana
- Universidade Cruzeiro do Sul (UNICSUL), Departamento de Pós-graduação, Faculdade de Odontologia (São Paulo/SP, Brazil)
| | - Marcela Charantola Rodrigues
- Universidade Municipal de São Caetano do Sul, Programa de Pós-Graduação em Ensino em Saúde (São Caetano do Sul/SP, Brazil)
| | - Bruno Bueno-Silva
- Universidade de Guarulhos (UNG), Faculdade de Odontologia (Guarulhos/SP, Brazil)
| | - Marina Guimarães Roscoe
- Universidade de São Paulo (FOUSP), Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia (São Paulo/SP, Brazil)
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Naves PA, Moura ALD, Rodrigues MC, Diniz MB, Arana-Chavez VE, Jordão MC, Cardoso CDAB. Effect of Xylitol Varnishes on the Inhibition of Demineralization in Vitro. Pesqui Bras Odontopediatria Clín Integr 2022. [DOI: 10.1590/pboci.2022.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Siqueira VL, Barreto GS, Silva EBV, Silva TVD, Nascimento DGD, Veronezi A, Rodrigues MC, Buzalaf MAR, Cardoso CDAB. Effect of xylitol varnishes on enamel remineralization of immature teeth: in vitro and in situ studies. Braz Oral Res 2021; 35:e137. [PMID: 34932666 DOI: 10.1590/1807-3107bor-2021.vol35.0137] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 06/14/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND We evaluated the efficacy of xylitol varnishes on the remineralization of newly erupted permanent and deciduous teeth in vitro and in situ. Human enamel specimens were randomly allocated to 8 groups (n = 15/group). Artificial caries lesions were produced and enamel alterations were quantified by surface/subsurface hardness and transverse microradiography. The blocks were then treated with the following varnishes: DuraphatTM; 20 wt% xylitol (146 μm) varnish; 20 wt% milled xylitol (80 μm) varnish, and placebo varnish, and removed after 6 h of immersion in artificial saliva. The blocks were subjected to pH-cycles for 8 days. CONCLUSIONS fifteen subjects wore palatal appliances containing four pre-demineralized and treated enamel specimens, for 5 days. Data were statistically analyzed by ANOVA/Tukey and Kruskal-Wallis/Tukey's test (p < 0.05). The %SHR in both studies was significantly increased by xylitol and Duraphat™ varnishes when compared to placebo. Considering subsurface remineralization, only the xylitol varnishes were able to significantly reduce the enamel lesion. Xylitol varnishes can be promising alternatives to promote enamel remineralization of newly erupted permanent and deciduous teeth.
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Affiliation(s)
- Vanessa Lira Siqueira
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, Department of Dentistry, São Paulo, SP, Brazil
| | - Gabriela Santos Barreto
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, Department of Dentistry, São Paulo, SP, Brazil
| | | | - Talita Vieira da Silva
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, Department of Dentistry, São Paulo, SP, Brazil
| | - Denis Gomes do Nascimento
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, Department of Dentistry, São Paulo, SP, Brazil
| | - André Veronezi
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, Department of Dentistry, São Paulo, SP, Brazil
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Vilela HS, Rodrigues MC, Fronza BM, Trinca RB, Vichi FM, Braga RR. Effect of Temperature and pH on Calcium Phosphate Precipitation. Crystal Research and Technology 2021. [DOI: 10.1002/crat.202100094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Handially Santos Vilela
- Department of Biomaterials and Oral Biology, School of Dentistry University of São Paulo Av. Prof. Lineu Prestes, 2227 São Paulo São Paulo 05508‐000 Brazil
| | - Marcela Charantola Rodrigues
- Municipal University of São Caetano do Sul (USCS) Rua Santo Antônio, 50 São Caetano do Sul São Paulo 09521‐160 Brazil
| | - Bruna Marin Fronza
- Department of Biomaterials and Oral Biology, School of Dentistry University of São Paulo Av. Prof. Lineu Prestes, 2227 São Paulo São Paulo 05508‐000 Brazil
| | - Rafael Bergamo Trinca
- Department of Biomaterials and Oral Biology, School of Dentistry University of São Paulo Av. Prof. Lineu Prestes, 2227 São Paulo São Paulo 05508‐000 Brazil
| | - Flávio Maron Vichi
- Department of Fundamental Chemistry, Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 São Paulo São Paulo 05508‐900 Brazil
| | - Roberto Ruggiero Braga
- Department of Biomaterials and Oral Biology, School of Dentistry University of São Paulo Av. Prof. Lineu Prestes, 2227 São Paulo São Paulo 05508‐000 Brazil
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Trovão T, Cavalcante MCV, Rodrigues MC, Ferraro AA, Bettiol H, Saraiva MCP, Lamy ZC, Lamy-Filho F. Determinants of the introduction of early complementary feeding before and after the third month of life: a multinomial analysis. ACTA ACUST UNITED AC 2020; 54:e10115. [PMID: 33237123 PMCID: PMC7679109 DOI: 10.1590/1414-431x202010115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/18/2020] [Accepted: 08/24/2020] [Indexed: 12/19/2022]
Abstract
The introduction of early complementary feeding (ECF) is determined by different factors depending on when it occurs. The objective of this study was to analyze factors associated with the introduction of ECF in two different moments of the infant's life: from zero to three and from four to five months of age. A cohort with 3,306 dyads studied in the BRISA survey in São Luis/MA in 2010 was used. Questionnaires were applied at birth and at follow-up when the infants were 15 to 36 months of age of women with more than 20 weeks of gestational age, residing in this municipality. A multivariate model of multinomial logistic regression was used to verify associations between independent variables and ECF at 0 to 3 months and at 4 to 5 months of age. A hierarchical analysis model was used to select variables for confounding adjustment. Variables with a P-value <0.05 were considered significant. For ECF introduced between 0-3 months, the variables "use of pacifier", "maternal paid activity", "smoking", and "postpartum pregnancy" were identified as risk factors. The variables "use of pacifier" and "maternal paid activity" remained associated as a risk for ECF introduced from 4-5 months. The variable 'mother without partner' (RR=1.26 and P=0.04) represented a risk factor for ECF only for the 4-5 months period. Although each period presented specific risk factors, the use of pacifier and maternal professional activity were associated in the two periods studied, indicating their importance for the introduction of ECF.
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Affiliation(s)
- T Trovão
- Programa de Pós-Graduação em Saúde Coletiva, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - M C V Cavalcante
- Hospital Universitário da Universidade Federal do Maranhão, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - M C Rodrigues
- Programa de Pós Graduação em Saúde Coletiva, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - A A Ferraro
- Departamento de Pediatria, Faculdade de Medicina da USP, Universidade de São Paulo, São Paulo, SP, Brasil
| | - H Bettiol
- Departamento de Puericultura e Pediatria, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - M C P Saraiva
- Departamento de Clínica Infantil, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - Z C Lamy
- Departamento de Saúde Pública, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - F Lamy-Filho
- Departamento de Medicina I, Universidade Federal do Maranhão, São Luís, MA, Brasil
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Vilela MS, Bernal VL, Chagas LLC, Vichi FM, Aranha ACC, Arana-Chavez VE, Braga RR, Rodrigues MC. Mechanical properties and surface roughness of polymer-based materials containing DCPD particles. Braz Oral Res 2020; 34:e095. [PMID: 32901725 DOI: 10.1590/1807-3107bor-2020.vol34.0095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 07/17/2020] [Indexed: 11/22/2022] Open
Abstract
The purpose of this study was to synthesize dicalcium phosphate dihydrate (DCPD) particles functionalized with triethylene glycol dimethacrylate (TEGDMA) through different routes by varying the receptor solution: ammonium phosphate (AP groups) or calcium nitrate (CN groups) and the moment in which TEGDMA was incorporated: ab initio (ab) or at the end of dripping the solution (ap). Two syntheses were performed without adding TEGDMA (nf). The particles were characterized by X-ray diffractometry, true density (using a helium pycnometer), surface area, and scanning electron microscopy. A 20 vol% of DCPD particles from the D, E, and F groups was added to the resin matrix to determine the degree of conversion (DC), biaxial flexural strength (BFS), the flexural modulus (FM), and surface roughness after an abrasive challenge (RA). A group with silanized barium glass particles was tested as a control. The data were submitted to ANOVA/Tukey's test (DC, BFS, and RA), and the Kruskal-Wallis test (FM) (alpha = 0.05). BFS values varied between 83 and 142 MPa, and the CN_ab group presented a similar value (123 MPa) to the control group. FM values varied between 3.6 and 8.7 GPa (CN_ab and CN_nf groups, respectively), with a significant difference found only between these groups. RA did not result in significant differences. The use of calcium nitrate solution as a receptor, together with ab initio functionalization formed particles with larger surface areas. Higher BFS values were observed for the material containing DCPD particles with a higher surface area. In general, the DC, FM, and RA values were not affected by the variables studied.
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Affiliation(s)
- Mateus Silva Vilela
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, São Paulo, SP, Brazil
| | - Vitória Leão Bernal
- Universidade Cruzeiro do Sul, Graduate Program in Dentistry, São Paulo, SP, Brazil
| | | | - Flávio Maron Vichi
- Universidade de São Paulo - USP, Institute of Chemistry, Department of Fundamental Chemistry, São Paulo, SP, Brazil
| | - Ana Cecília Corrêa Aranha
- Universidade de São Paulo - USP, School of Dentistry, Department of Operative Dentistry, São Paulo, SP, Brazil
| | - Victor Elias Arana-Chavez
- Universidade de São Paulo - USP, School of Dentistry, Department of Biometarials and Oral Biology, São Paulo, SP, Brazil
| | - Roberto Ruggiero Braga
- Universidade de São Paulo - USP, School of Dentistry, Department of Biometarials and Oral Biology, São Paulo, SP, Brazil
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Rodrigues MC, Rolim WR, Viana MM, Souza TR, Gonçalves F, Tanaka CJ, Bueno-Silva B, Seabra AB. Biogenic synthesis and antimicrobial activity of silica-coated silver nanoparticles for esthetic dental applications. J Dent 2020; 96:103327. [PMID: 32229160 DOI: 10.1016/j.jdent.2020.103327] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 09/19/2019] [Revised: 03/19/2020] [Accepted: 03/21/2020] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVES this study aimed to synthesize AgNPs from green tea (GT) extract, forming GT-AgNPs, and to coat their surfaces with silica, resulting in light-colored Ag@SiO2 nanoparticles. MATERIALS AND METHODS particles were characterized and tested for minimal inhibitory concentration (MIC), biofilm formation against Streptococcus mutans and cytotoxicity evaluation on dental pulp fibroblasts. RESULTS X-ray diffraction (XRD) confirmed the formation of pure AgNPs, whereas energy dispersive X-ray spectroscopy (EDS) mapped their elemental atoms. Dynamic light scattering (DLS) demonstrated formation of particles at nanoscale, with moderate polydispersity and negative zeta potential, in agreement with nanoparticle tracking analysis (NTA) size measurements. Fourier-transformed infrared (FTIR) spectroscopy confirmed the successful condensation of silica, which significantly increased surface area by 50%, as assayed by surface area analysis (BET). Thermogravimetric analysis showed a 18%-mass of silica on the surface of Ag@SiO2NPs. Transmission electron microscopy (TEM) displayed the spherical shape of nanoparticles and average size of 11 nm for GT-AgNPs and Ag@SiO2NPs. Ag@SiO2NPs demonstrated potent antimicrobial action against S. mutans, with MIC determined as 600 μg/mL, and inhibition of approximately 44% (p < 0.05) of biofilm formation. At the MIC concentrations, both NPs did not exhibit cytotoxicity. CONCLUSION Ag@SiO2NPs might have a useful application in dental materials. CLINICAL SIGNIFICANCE The possibility of incorporating antimicrobial properties in restorative materials without compromising esthetics makes the AgNPs@SiO2 NPs promising agents against S. mutans biofilm formation, hence the prevention of dental caries. This represents a great step towards the development of more interactive biomaterials in dentistry to overcome clinical problems.
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Affiliation(s)
- Marcela Charantola Rodrigues
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil; Municipal University of São Caetano do Sul (USCS), Santo Antônio St., 50, 09521-160, São Caetano do Sul, SP, Brazil.
| | - Wallace Rosado Rolim
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), dos Estados Ave., 5001, 09210-580, Santo André, SP, Brazil
| | - Marina Mariante Viana
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil
| | - Thaís Rodrigues Souza
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil
| | - Flavia Gonçalves
- Ibirapuera University (UNIB), Interlagos Ave., 1329, 04661-100, São Paulo, SP, Brazil
| | - Caio Junji Tanaka
- Dental Research Division, Guarulhos University, Teresa Cristina Square, 229, 07023-070, Guarulhos, SP, Brazil
| | - Bruno Bueno-Silva
- Dental Research Division, Guarulhos University, Teresa Cristina Square, 229, 07023-070, Guarulhos, SP, Brazil
| | - Amedea Barozzi Seabra
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), dos Estados Ave., 5001, 09210-580, Santo André, SP, Brazil
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Viana MM, do Amaral SF, Nakao E, Rodrigues MC. Conservative approach to the restoration of vital teeth affected by severe tissue wear. J Prosthet Dent 2020; 123:191-195. [DOI: 10.1016/j.prosdent.2018.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 11/28/2022]
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Marques RS, Cooke RF, Rodrigues MC, Brandão AP, Schubach KM, Lippolis KD, Moriel P, Perry GA, Lock A, Bohnert DW. Effects of supplementing calcium salts of polyunsaturated fatty acids to late-gestating beef cows on performance and physiological responses of the offspring. J Anim Sci 2018; 95:5347-5357. [PMID: 29293770 DOI: 10.2527/jas2017.1606] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
This experiment compared performance and physiological responses of the offspring from cows supplemented with Ca salts of PUFA or SFA + MUFA during late gestation. Ninety-six multiparous, nonlactating, pregnant Angus × Hereford cows were ranked by BW, BCS, and age and divided into 24 groups of 4 cows/group at the end of their second trimester of gestation (d -7). Cows conceived during the same estrus synchronization + AI protocol, with semen from a single sire; hence, gestation length was 195 d for all cows at the beginning of the experiment (d 0). Groups were randomly assigned to receive (DM basis) 405 g/cow daily of soybean meal in addition to 1) 190 g/cow daily of Ca salts of PUFA based on eicosapentaenoic, docosahexaenoic, and linoleic acids or 2) 190 g/cow daily of Ca salts of SFA + MUFA based on palmitic and oleic acids (CON). Groups were maintained in 2 pastures (6 groups of each treatment/pasture) and received daily 10.1 kg/cow (DM basis) of grass-alfalfa hay. Groups were segregated into 1 of 12 drylot pens (6 by 18 m) and individually offered treatments 3 times/wk from d 0 until calving. Cow BW and BCS were recorded, and blood samples were collected on d -7 of the experiment and also within 12 h after calving. Calf BW was also recorded within 12 h of calving. Calves were weaned on d 280 of the experiment, preconditioned for 45 d (d 280 to 325), transferred to a growing lot on d 325, and moved to a finishing lot on d 445, where they remained until slaughter. At calving, PUFA-supplemented cows had a greater ( < 0.01) proportion (as % of total plasma fatty acids) of PUFA, including linoleic, linolenic, arachidonic, docosapentaenoic, and docosahexaenoic acids. At weaning, calves from CON-supplemented cows were older ( = 0.03), although no treatment differences were detected ( = 0.82) for calf weaning BW. During both growing and finishing phases, ADG was greater ( ≤ 0.06) in calves from PUFA-supplemented cows. Upon slaughter, HCW and marbling were also greater ( ≤ 0.05) in calves from PUFA-supplemented cows. Collectively, these results indicate that supplementing eicosapentaenoic, docosahexaenoic, and linoleic acids to late-gestating beef cows stimulated programming effects on postnatal offspring growth and carcass quality. Therefore, supplementing late-gestating beef cows with Ca salts of PUFA appears to optimize offspring productivity in beef production systems.
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Liao Z, Rodrigues MC, Poynter JN, Amatruda JF, Rodriguez-Galindo C, Frazier AL. Risk of second malignant neoplasms in women and girls with germ cell tumors. Ann Oncol 2017; 28:329-332. [PMID: 27864217 DOI: 10.1093/annonc/mdw609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background While an elevated risk of second malignant neoplasms (SMNs) has been observed in men treated for germ cell tumors (GCTs), risk of SMNs have not been quantified in adult women or in girls treated for GCTs. Patients and methods One-year survivors of primary GCTs diagnosed between January 1980 and December 2012 were identified from Surveillance, Epidemiology, and End Results (SEER 9) registries. Risk of SMNs was calculated using SEER*Stat. Results Among 1507 patients, a total of 47 SMNs were identified. The overall risk of SMNs was not elevated in females overall or in females treated for GCT during adulthood although SMN sites (pancreas, soft tissue, bladder, kidney, and thyroid) and trends were comparable with those in men. There were too few childhood GCT cases with SMNs for further analysis. Conclusions Unlike men, women treated for GCTs did not have a statistically significant elevated risk of SMNs [standardized incidence ratio = 1.11; 95% confidence interval (CI) = 0.81-1.47]. The fact that SMNs in women occur in sites similar to those observed in men indicate that long-term follow-up of a larger cohort of females treated for GCT is warranted.
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Affiliation(s)
- Z Liao
- Division of Hematology/Oncology, Dana-Farber Cancer Institute and Boston Children's Hospital, Boston.,Interdepartmental Program in Biochemistry, Wellesley College, Wellesley, USA
| | - M C Rodrigues
- Medical Science, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, Brazil
| | - J N Poynter
- Department of Pediatrics, Division of Epidemiology and Clinical Research.,Departments of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis
| | - J F Amatruda
- Departments of Pediatrics, Molecular Biology and Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - C Rodriguez-Galindo
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, USA
| | - A L Frazier
- Division of Hematology/Oncology, Dana-Farber Cancer Institute and Boston Children's Hospital, Boston
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Maas MS, Alania Y, Natale LC, Rodrigues MC, Watts DC, Braga RR. Trends in restorative composites research: what is in the future? Braz Oral Res 2017; 31:e55. [PMID: 28902235 DOI: 10.1590/1807-3107bor-2017.vol31.0055] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 05/22/2017] [Indexed: 01/12/2023] Open
Abstract
Clinical trials have identified secondary caries and bulk fracture as the main causes for composite restoration failure. As a measure to avoid frequent reinterventions for restoration replacement, composites with some sort of defense mechanism against biofilm formation and demineralization, as well as materials with lower susceptibility to crack propagation are necessary. Also, the restorative procedure with composites are very time-consuming and technically demanding, particularly concerning the application of the adhesive system. Therefore, together with bulk-fill composites, self-adhesive restorative composites could reduce operator error and chairside time. This literature review describes the current stage of development of remineralizing, antibacterial and self-healing composites. Also, an overview of the research on fiber-reinforced composites and self-adhesive composites, both introduced for clinical use in recent years, is presented.
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Affiliation(s)
- Mariel Soeiro Maas
- Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Yvette Alania
- Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Livia Camargo Natale
- Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Marcela Charantola Rodrigues
- Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - David Christopher Watts
- University of Manchester School of Medical Sciences, Division of Dentistry, Manchester, United Kingdom
| | - Roberto Ruggiero Braga
- Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
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Ionescu AC, Hahnel S, Cazzaniga G, Ottobelli M, Braga RR, Rodrigues MC, Brambilla E. Streptococcus mutans adherence and biofilm formation on experimental composites containing dicalcium phosphate dihydrate nanoparticles. J Mater Sci Mater Med 2017; 28:108. [PMID: 28540581 DOI: 10.1007/s10856-017-5914-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 05/10/2017] [Indexed: 06/07/2023]
Abstract
UNLABELLED This study aimed at evaluating bacterial adhesion and biofilm formation on resin-based composites (RBC) including dicalcium phosphate dihydrate nanoparticles (nDCPD). METHODS Specimens were prepared from experimental RBCs with BisGMA/TEGDMA resin matrix including 20 vol% of either nDCPD (nDCPD-RBC), TEGDMA-functionalized nDPCD (F-nDCPD-RBC) or silanized silica (SiO2-RBC). Neat resin blend (control-Resin), conventional nanohybrid RBC (control-RBC) and human enamel were used for reference. Characterization of the specimens included surface roughness (SR), surface free energy (SFE), chemical surface composition (EDS, XPS), and buffering ability of a pH = 4.00 solution. Streptococcus mutans adherence was assessed after 2 h; biofilm formation was simulated for 48 h using a bioreactor. Adherent, viable biomass was determined using tetrazolium salt assay (MTT). RESULTS nDCPD-RBC yielded highest roughness and showed higher polar and lower disperse component to total SFE. EDS and XPS indicated higher amounts of calcium and phosphate on the surface of nDCPD-RBC than on F-nDCPD-RBC. nDCPD buffered the acidic solution to 5.74, while functionalization almost prevented buffering (pH = 4.26). F-nDCPD-RBC reduced adherence and biofilm formation in comparison to nDCPD-RBC. Regardless of functionalization, biofilm formation on nDCPD-containing RBCs was not significantly different from SiO2-RBC. Control-Resin, control-RBC, and enamel surfaces showed similar adherence values as F-nDCPD-RBC, but lower biofilm formation compared to both nDCPD-containing RBCs. In conclusion, the incorporation of nDCPD did not minimize S. mutans adherence and biofilm formation as a function of the materials´ surface properties. However, results observed for the buffering capacity indicated that optimized formulations of biomimetic RBCs may be useful for modulating their interaction with microorganisms.
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Affiliation(s)
- Andrei C Ionescu
- Department of Biomedical, Surgical and Dental Sciences, IRCCS Galeazzi Orthopedic Institute, University of Milan, Via R. Galeazzi, 4, Milan, 20133, Italy.
| | - Sebastian Hahnel
- Department of Prosthetic Dentistry, Regensburg University Medical Center, Regensburg, 93042, Germany
| | - Gloria Cazzaniga
- Department of Biomedical, Surgical and Dental Sciences, IRCCS Galeazzi Orthopedic Institute, University of Milan, Via R. Galeazzi, 4, Milan, 20133, Italy
| | - Marco Ottobelli
- Department of Biomedical, Surgical and Dental Sciences, IRCCS Galeazzi Orthopedic Institute, University of Milan, Via R. Galeazzi, 4, Milan, 20133, Italy
| | - Roberto Ruggiero Braga
- Department of Biomaterials and Oral Biology, Dental Faculty, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, 05508-000, Brazil
| | - Marcela Charantola Rodrigues
- Department of Biomaterials and Oral Biology, Dental Faculty, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, 05508-000, Brazil
| | - Eugenio Brambilla
- Department of Biomedical, Surgical and Dental Sciences, IRCCS Galeazzi Orthopedic Institute, University of Milan, Via R. Galeazzi, 4, Milan, 20133, Italy
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Marques RS, Cooke RF, Rodrigues MC, Cappellozza BI, Mills RR, Larson CK, Moriel P, Bohnert DW. Effects of organic or inorganic cobalt, copper, manganese, and zinc supplementation to late-gestating beef cows on productive and physiological responses of the offspring. J Anim Sci 2016; 94:1215-26. [PMID: 27065282 DOI: 10.2527/jas.2015-0036] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Eighty-four multiparous, nonlactating, pregnant Angus × Hereford cows were ranked by pregnancy type (56 AI and 28 natural service), BW, and BCS and allocated to 21 drylot pens at the end of their second trimester of gestation (d 0). Pens were assigned to receive forage-based diets containing 1) sulfate sources of Cu, Co, Mn, and Zn (INR); 2) an organic complexed source of Cu, Mn, Co, and Zn (AAC; Availa 4; Zinpro Corporation, Eden Prairie, MN); or 3) no supplemental Cu, Co, Mn, and Zn (CON). Diets were offered from d 0 until calving and formulated to meet requirements for energy, protein, macrominerals, Se, I, and vitamins. The INR and AAC diets provided the same daily amount of Cu, Co, Mn, and Zn. Cow BW and BCS were recorded and liver samples were collected on d -10 and 2 wk (d 75) before the calving season. Within 3 h after calving, calf BW was recorded, liver samples were collected, and the expelled placenta was retrieved ( = 47 placentas). Calves were weaned on d 283 of the experiment, preconditioned for 45 d (d 283 to 328), transferred to a growing lot on d 328, and moved to a finishing lot on d 440 where they remained until slaughter. Liver Co, Cu, and Zn concentrations on d 75 were greater ( ≤ 0.05) for INR and AAC cows compared with CON cows, whereas INR cows had reduced ( = 0.04) liver Co but greater ( = 0.03) liver Cu compared with AAC cows. In placental cotyledons, Co concentrations were greater ( ≤ 0.05) in AAC and INR cows compared with CON cows, whereas Cu concentrations were increased ( = 0.05) only in AAC cows compared with CON cows. Calves from INR and AAC cows had greater ( < 0.01) liver Co concentrations at birth compared with calves from CON cows. Liver Cu and Zn concentrations at birth were greater ( ≤ 0.05) in calves from AAC cows compared with cohorts from CON cows. Weaning BW was greater ( ≤ 0.05) in calves from AAC cows compared with cohorts from CON cows, and this difference was maintained until slaughter. In the growing lot, calves from AAC cows had reduced ( < 0.01) incidence of bovine respiratory disease compared with CON and INR cohorts. Collectively, these results suggest that feeding the AAC diet to late-gestating beef cows stimulated programming effects on postnatal offspring growth and health compared with the CON diet. Therefore, supplementing late-gestating beef cows with an organic complexed source of Co, Cu, Zn, and Mn instead of no supplementation appears to optimize offspring productivity in beef production systems.
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Rodrigues MC, Cooke RF, Marques RS, Arispe SA, Keisler DH, Bohnert DW. Effects of oral meloxicam administration to beef cattle receiving lipopolysaccharide administration or vaccination against respiratory pathogens. J Anim Sci 2016; 93:5018-27. [PMID: 26523594 DOI: 10.2527/jas.2015-9424] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study evaluated the effects of oral meloxicam administration on metabolic, inflammatory, and acute-phase responses of beef cattle receiving a lipopolysaccharide (LPS) challenge (Exp. 1; d -1 to 6) or vaccinated against respiratory pathogens (Exp. 2; d 7 to 21). Twenty-one Angus steers ( = 11) and heifers ( = 10) were housed in individual pens on d -15 and were offered free-choice water, mineral-vitamin mix, and hay until d 21. In Exp. 1, cattle were ranked on d -1 by sex and BW and assigned to 1) oral meloxicam administration (1 mg/kg BW daily) from day -1 to 6 (MEL8), 2) oral meloxicam administration (1 mg/kg BW) on d 0 and oral lactose monohydrate administration (1 mg/kg BW) on d -1 and from d 1 to 6 (MEL1), or 3) oral lactose monohydrate administration (1 mg/kg BW daily) from d -1 to 6 (CON). On d 0, cattle received an intravenous LPS bolus (0.5 μg/kg BW) concurrently with treatment administration. Rectal temperature (RTEMP) was assessed, and blood samples were collected at -2, 0, 2, 4, 6, 8, 12, 16, 24, 36, 48, 60, 72, 96, 120, and 144 h relative to LPS administration. No treatment effects were detected ( ≥ 0.36) for RTEMP, concentrations of serum tumor necrosis factor α (TNFα), plasma haptoglobin, cortisol, insulin, and leptin, as well as blood mRNA expression of α and cyclooxygenase-2, although all variables increased ( < 0.01) across treatments after LPS administration. In Exp. 2, cattle received the same treatments that they were assigned to in Exp. 1 from d 7 to d 13 and were vaccinated against respiratory pathogens concurrently with treatment administration on d 8. Blood samples were collected, and RTEMP was assessed as in Exp. 1 in addition to 168, 240, and 336 h relative to vaccination. No treatment effects were detected ( ≥ 0.26) for RTEMP, the same plasma and serum variables evaluated in Exp. 1, and serum concentrations of antibodies against or serum titers against bovine respiratory syncytial virus, bovine herpesvirus-1, bovine viral diarrhea virus-1, and parainfluenza-3 virus. All variables increased ( < 0.01) across treatments after vaccination, except for serum TNFα and titers against bovine viral diarrhea virus-1 ( ≥ 0.40). Collectively, this study found no evidence that oral meloxicam administration, at the doses and intervals utilized herein, mitigated the metabolic, inflammatory, and acute-phase reactions elicited by LPS administration or vaccination against respiratory pathogens.
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Rodrigues MC, Cooke RF, Marques RS, Cappellozza BI, Arispe SA, Keisler DH, Bohnert DW. Effects of vaccination against respiratory pathogens on feed intake, metabolic, and inflammatory responses in beef heifers. J Anim Sci 2016; 93:4443-52. [PMID: 26440344 DOI: 10.2527/jas.2015-9277] [Citation(s) in RCA: 25] [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: 12/23/2022] Open
Abstract
The objective of this study was to evaluate intake, metabolic, inflammatory, and acute-phase responses in beef heifers vaccinated against pathogens that cause bovine respiratory disease (BRD). Eighteen weaned Angus heifers (initial BW 257 ± 3 kg; initial age 245 ± 2 d) were ranked by BW and allocated to 2 groups, which were assigned to 2 experiments of 7 d and the following treatments on d 1 of each experiment: 1) revaccinated against infectious bovine rhinotracheitis virus, parainfluenza-3 virus, bovine respiratory syncytial virus, bovine viral diarrhea Types 1 and 2 viruses, and (VAC; 2 mL [s.c.]) and 2) receiving a 2-mL s.c. injection of 0.9% sterile saline (CON). The group receiving VAC in Exp. 1 was assigned to CON in Exp. 2 and vice versa. Heifers were weaned 21 d before Exp. 1, when they all received the first dose of the aforementioned vaccine. Heifers were maintained in individual pens and offered free-choice mixed alfalfa-grass hay and 3.5 kg/d (DM basis) of a corn-based supplement throughout the study. During Exp. 1, hay and concentrate intake were evaluated daily. During Exp. 2, blood samples were collected before (-2 and 0 h) and at 2, 4, 6, 8, 12, 16, 24, 36, 48, 60, 72, 96, 120, 144, and 168 h after treatment administration. In Exp. 1, treatment × day interactions were detected ( < 0.01) for forage intake and total DMI; these parameters were reduced ( ≤ 0.05) in VAC heifers compared with CON heifers on d 1 and 2 by an average of 1.7 and 0.8 kg (DM basis), respectively. In Exp. 2, mean serum tumor necrosis factor α (TNFα) concentration was greater ( = 0.05) in VAC heifers compared with CON heifers and treatment × hour interactions were detected for all plasma variables ( ≤ 0.02), whereas a similar tendency was detected ( = 0.09) for blood α mRNA expression. Haptoglobin concentrations were greater ( ≤ 0.05) in VAC heifers compared with CON heifers from 16 to 120 h. Blood α mRNA expression was greater ( = 0.05) in VAC heifers compared with CON heifers at 12 h. Cortisol concentrations were greater ( ≤ 0.05) in VAC heifers compared with CON heifers from 2 to 16 h. Insulin concentration was greater ( = 0.02) in VAC heifers compared with CON heifers at 2 h. Leptin concentrations were greater ( ≤ 0.05) in VAC heifers compared with CON heifers from 6 to 16 h. In conclusion, vaccinating beef heifers against BRD pathogens decreased forage intake and total DMI during the 2 d following vaccination in Exp. 1, which can be associated with transient metabolic, inflammatory, and acute-phase responses elicited by vaccination in Exp. 2.
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Cooke RF, Peres RFG, Cipriano RS, Guarnieri Filho TA, Marques RS, Rodrigues MC, Carvalho RS, Bohnert DW, Vasconcelos JLM. Impacts of meloxicam administration before temporary calf weaning on physiological and reproductive responses of beef cows. J Anim Sci 2016; 94:406-11. [PMID: 26812346 DOI: 10.2527/jas.2015-9222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this experiment was to evaluate temperament, physiological, and reproductive variables in beef cows assigned to an estrus synchronization + timed AI protocol including eCG administration, 48-h temporary calf weaning (TCW), or TCW + meloxicam administration. A total of 943 lactating, multiparous, nonpregnant Nelore cows, allocated into 8 groups of approximately 120 cows each, were assigned to the experiment. Groups were maintained in individual pastures and assigned to the following estrus synchronization + timed AI protocol: a 2-mg injection of estradiol benzoate and an intravaginal progesterone-releasing device (CIDR) on d 0, a 12.5-mg injection of PGF on d 7, CIDR removal in addition to a 0.6-mg injection of estradiol cypionate on d 9, and timed AI on d 11. Within each group, cows were randomly assigned on d 9 to 1) TCW from d 9 to 11 (TCW-CON; = 317), 2) no TCW and a 300-IU injection of eCG on d 9 (NOTCW; = 311), and 3) TCW-CON in addition to meloxicam administration (intramuscular; 0.5 mg/kg BW) on d 9 (TCW-MEL; = 315). Cow BW and BCS were assessed on d 0. On d 9 and 11, blood samples were collected, and cow temperament was evaluated via chute score and exit velocity. Pregnancy status was verified 30 d after timed AI via transrectal ultrasonography. No treatment differences were detected ( ≥ 0.23) for cow age, days postpartum, BW, and BCS on d 0 of the estrus synchronization + timed AI protocol. No treatment effects were detected ( ≥ 0.41) for any of the temperament variables evaluated. A treatment × day interaction was detected ( = 0.02) for serum cortisol concentrations, which were similar ( = 0.55) between treatments on d 9 but greater ( ≤ 0.05) in TCW-CON and TCW-MEL compared with NOTCW cows on d 11. No treatment effects were detected ( = 0.90) for serum haptoglobin concentrations, which decreased from d 9 to 11 in all treatments (day effect; < 0.01). No treatment differences were detected ( = 0.84) for pregnancy rates to timed AI. In summary, TCW during estrus synchronization did not impact temperament or serum haptoglobin concentrations in beef cows but increased serum cortisol concentrations compared with cows not assigned to TCW, although such an outcome was not sufficient to impact pregnancy rates to timed AI. Moreover, administration of meloxicam did not alleviate the TCW-induced increase in serum cortisol concentrations and failed to benefit pregnancy rates to timed AI in beef cows.
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Rodrigues MC, Hewer TLR, de Souza Brito GE, Arana-Chavez VE, Braga RR. Calcium phosphate nanoparticles functionalized with a dimethacrylate monomer. Materials Science and Engineering: C 2014; 45:122-6. [DOI: 10.1016/j.msec.2014.08.066] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 08/06/2014] [Accepted: 08/29/2014] [Indexed: 01/01/2023]
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Natale LC, Rodrigues MC, Xavier TA, Simões A, de Souza DN, Braga RR. Ion release and mechanical properties of calcium silicate and calcium hydroxide materials used for pulp capping. Int Endod J 2014; 48:89-94. [PMID: 24646329 DOI: 10.1111/iej.12281] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 03/13/2014] [Indexed: 11/28/2022]
Abstract
AIM To compare the ion release and mechanical properties of a calcium hydroxide (Dycal) and two calcium silicate (MTA Angelus and Biodentine) cements. METHODOLOGY Calcium and hydroxyl ion release in water from 24-h set cements were calculated from titration with HCl (n = 3). Calcium release after 7, 14, 21 and 28 days at pH 5.5 and 7.0 was measured using ICP-OES (n = 6). Flexural strength (FS) and modulus (E) were tested after 48-h storage, and compressive strength (CS) was tested after 48 h and 7 days (n = 10). Ion release and mechanical data were subjected to anova/Tukey and Kruskal-Wallis/Mann-Whitney tests, respectively (α = 0.05). RESULTS Titration curves revealed that Dycal released significantly fewer ions in solution than calcium silicates (P < 0.001). Calcium release remained constant at pH 7.0, whilst at pH 5.5, it dropped significantly by 24% after 21 days (P < 0.05). At pH 5.5, MTA Angelus released significantly more calcium than Dycal (P < 0.01), whilst Biodentine had superior ion release than Dycal at pH 7.0 (P < 0.01). Biodentine had superior flexural strength, flexural modulus and compressive strength than the other cements, whilst MTA Angelus had higher modulus than Dycal (P < 0.001). CONCLUSIONS Immediate calcium and hydroxyl ion release in solution was significantly lower for Dycal. In general, all materials released constant calcium levels over 28 days, but release from Dycal was significantly lower than Biodentine and MTA Angelus depending on pH conditions. Biodentine had substantially higher strength and modulus than MTA Angelus and Dycal, both of which demonstrated low stress-bearing capabilities.
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Affiliation(s)
- L C Natale
- Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
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Rodrigues MC, Mondelli RFL, Oliveira GU, Franco EB, Baseggio W, Wang L. Minimal alterations on the enamel surface by micro-abrasion: in vitro roughness and wear assessments. J Appl Oral Sci 2013; 21:112-7. [PMID: 23739863 PMCID: PMC3881870 DOI: 10.1590/1678-7757201302117] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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: 02/07/2012] [Accepted: 01/30/2013] [Indexed: 12/14/2022] Open
Abstract
Objective: To evaluate the in vitro changes on the enamel surface after a
micro-abrasion treatment promoted by different products. Material and Methods: Fifty (50) fragments of bovine enamel (15 mm x 5 mm) were randomly assigned to
five groups (n=10) according to the product utilized: G1 (control)= silicone
polisher (TDV), G2= 37% phosphoric acid (3M/ESPE) + pumice stone (SS White), G3=
Micropol (DMC Equipment), G4= Opalustre (Ultradent) and G5= Whiteness RM (FGM
Dental Products). Roughness and wear were the responsible variables used to
analyze these surfaces in four stages: baseline, 60 s and 120 s after the
micro-abrasion and after polishing, using a Hommel Tester T1000 device. After the
tests, a normal distribution of data was verified, with repeated ANOVA analyses
(p≤0.05) which were used to compare each product in different stages. One-way
ANOVA and Tukey tests were applied for individual comparisons between the products
in each stage (p≤0.05). Results: Means and standard deviations of roughness and wear (mm) after all the promoted
stages were: G1=7.26(1.81)/13.16(2.67), G2=2.02(0.62)/37.44(3.33),
G3=1.81(0.91)/34.93(6.92), G4=1.92(0.29)/38.42(0.65) and
G5=1.98(0.53)/33.45(2.66). At 60 seconds, all products tended to produce less
surface roughness with a variable gradual decrease over time. After polishing,
there were no statistically significant differences between the groups, except for
G1. Independent of the product utilized, the enamel wear occurred after the
micro-abrasion. Conclusions: In this in vitro study, enamel
micro-abrasion presented itself as a conservative approach, regardless of the type
of the paste compound utilized. These products promoted minor roughness
alterations and minimal wear. The use of phosphoric acid and pumice stone showed
similar results to commercial products for the micro-abrasion with regard to the
surface roughness and wear.
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Affiliation(s)
- Marcela Charantola Rodrigues
- Department of Operative Dentistry, Dental Materials and Endodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Sztajnbok F, Boechat NL, Oliveira SK, Ribeiro SB, Rodrigues MC, Diniz C, Sztajnbok FCDN, Sant'Anna CC. PReS-FINAL-2054: Latent tuberculosis infection in patients with juvenile idiopathic arthritis undergoing methotrexate therapy: a longitudinal study with TST and ELISPOT. Pediatr Rheumatol Online J 2013. [PMCID: PMC4044362 DOI: 10.1186/1546-0096-11-s2-p67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Oliveira GUD, Mondelli RFL, Charantola Rodrigues M, Franco EB, Ishikiriama SK, Wang L. Impact of filler size and distribution on roughness and wear of composite resin after simulated toothbrushing. J Appl Oral Sci 2013; 20:510-6. [PMID: 23138735 PMCID: PMC3881789 DOI: 10.1590/s1678-77572012000500003] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [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: 11/05/2010] [Accepted: 09/05/2010] [Indexed: 11/25/2022] Open
Abstract
Objectives Nanofilled composite resins are claimed to provide superior mechanical properties
compared with microhybrid resins. Thus, the aim of this study was to compare
nanofilled with microhybrid composite resins. The null hypothesis was that the
size and the distribution of fillers do not influence the mechanical properties of
surface roughness and wear after simulated toothbrushing test. Material and methods Ten rectangular specimens (15 mm x 5 mm x 4 mm) of Filtek Z250 (FZ2), Admira (A),
TPH3 (T),Esthet-X (EX), Estelite Sigma (ES), Concept Advanced (C), Grandio (G) and
Filtek Z350 (F) were prepared according to manufacturer's instructions. Half of
each top surface was protected with nail polish as control surface (not brushed)
while the other half was assessed with five random readings using a roughness
tester (Ra). Following, the specimens were abraded by simulated toothbrushing with
soft toothbrushes and slurry comprised of 2:1 water and dentifrice (w/w). 100,000
strokes were performed and the brushed surfaces were re-analyzed. Nail polish
layers were removed from the specimens so that the roughness (Ra) and the wear
could be assessed with three random readings (µm). Data were analyzed by ANOVA and
Tukey's multiple-comparison test (α=0.05). Results Overall outcomes indicated that composite resins showed a significant increase in
roughness after simulated toothbrushing, except for Grandio, which presented a
smoother surface. Generally, wear of nanofilled resins was significantly lower
compared with microhybrid resins. Conclusions As restorative materials suffer alterations under mechanical challenges, such as
toothbrushing, the use of nanofilled materials seem to be more resistant than
microhybrid composite resins, being less prone to be rougher and worn.
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Affiliation(s)
- Gabriela Ulian de Oliveira
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Rodrigues MC, Campagnole-Santos MJ, Machado RP, Silva ME, Rocha JLM, Ferreira PM, Santos RAS, Alzamora AC. Evidence for a role of AT(2) receptors at the CVLM in the cardiovascular changes induced by low-intensity physical activity in renovascular hypertensive rats. Peptides 2007; 28:1375-82. [PMID: 17629353 DOI: 10.1016/j.peptides.2007.06.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Revised: 06/04/2007] [Accepted: 06/04/2007] [Indexed: 11/25/2022]
Abstract
In the present study, we evaluated the involvement of the rennin-angiotensin system (RAS) in the control of the blood pressure (BP), baroreceptor-mediated bradycardia and the reactivity of caudal ventrolateral medulla (CVLM) neurons to Ang II and to AT(2) receptor antagonist in sedentary or trained renovascular hypertensive rats. Physical activity did not significantly change the baseline mean arterial pressure (MAP), heart rate (HR) or the sensitivity of the baroreflex bradycardia in normotensive Sham rats. However, in 2K1C hypertensive rats, physical activity induced a significant fall in baseline MAP and HR and produced an improvement of the baroreflex function (bradycardic component). The microinjections of Ang II into the CVLM produced similar decreases in MAP in all groups, Sham and 2K1C, sedentary and trained rats. The hypotensive effect of Ang II at the CVLM was blocked by previous microinjection of the AT(2) receptors antagonist, PD123319, in all groups of rats. Unexpectedly, microinjection of PD123319 at the CVLM produced a depressor effect in 2K1C sedentary that was attenuated in 2K1C trained rats. No significant changes in MAP were observed after PD123319 in Sham rats, sedentary or trained. These data showed that low-intensity physical activity is effective in lowering blood pressure and restoring the sensitivity of the baroreflex bradycardia, however these cardiovascular effects are not accompanied by changes in the responsiveness to Ang II at CVLM in normotensive or hypertensive, 2K1C rats. In addition, the blood pressure changes observed after AT(2) blockade in 2K1C rats suggest that hypertension may trigger an imbalance of AT(1)/AT(2) receptors at the CVLM that may be restored, at least in part, by low-intensity physical activity.
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Affiliation(s)
- M C Rodrigues
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
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Abstract
OBJECTIVE: To present an updated review concerning the most prevalent diseases with musculoskeletal signs and symptoms that make adolescents seek medical care, giving special emphasis to rheumatic diseases. Our aim is to offer physicians and health care providers the possibility of distinct differential diagnoses, thus allowing them to establish a therapeutic approach and, if necessary, refer the patient to a specialist METHODS: Review of literature using Medline database, data obtained at our department, and the authorś personal experience. RESULTS: Musculoskeletal pain is characteristic of several diseases and usually urges adolescents to seek medical care. Rheumatic diseases, especially rheumatic fever, account for nearly fifty percent of the cases. In adolescents, it is also important that the aspects regarding the diagnosis and treatment of idiopathic juvenile arthritis, arthritis associated with enthesitis, systemic lupus erythematosus, and vasculitis be considered. Fibromyalgia, reflex sympathetic dystrophy, growing pains, hypermobility syndrome, and psychogenic rheumatism are noninflammatory conditions that frequently mimic rheumatic diseases. CONCLUSIONS: Inflammatory and noninflammatory conditions, and diseases of different etiology (infectious, neoplastic, and orthopedic) are frequently associated with musculoskeletal pain. It is important that health professionals diagnose these diseases as early as possible so that prompt action can be taken and prognosis can be improved.
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Affiliation(s)
- F R Sztajnbok
- Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
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27
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Rodrigues MC, Guizzo R, dos Santos WF, Cairasco NG. A comparative neuroethological study of limbic seizures induced by Parawixia bistriata venom and kainic acid injections in rats. Brain Res Bull 2001; 55:79-86. [PMID: 11427341 DOI: 10.1016/s0361-9230(01)00495-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/26/2022]
Abstract
A number of neurotoxins derived from arthropod venoms are known to show highly selective effects on nervous tissue. These neurotoxins have been proved to be extremely useful tools to investigate either convulsive or anticonvulsive mechanisms in the nervous system. In the present work, intracerebroventricular injection of the crude venom from the spider Parawixia bistriata (Araneae, Araneidae) in rats induced convulsive limbic seizures (head and forelimb myoclonus, as well as rearing and falling). Neuroethological analysis showed that the limbic seizures induced by the venom were different from those induced by kainic acid. Intravenous injection of the same venom did not induce seizures, but the neuroethological analysis showed an intensification of grooming behavior similar to a displaced activity. In conclusion, our experiments point that crude venom of P. bistriata may contain convulsant neurotoxins probably acting in limbic system structures. The mechanism of action of these neurotoxins may be different from simple activation of glutamatergic kainate receptors, as evidenced by a comparative neuroethological analysis of seizures induced by either venom or kainic acid.
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Affiliation(s)
- M C Rodrigues
- Programa de Pós-graduação em Psicobiologia, Departamento de Psicologia e Educação, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
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Seabra LM, Zapata JF, Fuentes MF, Aguiar CM, Freitas ER, Rodrigues MC. Effect of deboning time, muscle tensioning, and calcium chloride marination on texture characteristics of chicken breast meat. Poult Sci 2001; 80:109-12. [PMID: 11214330 DOI: 10.1093/ps/80.1.109] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/13/2022] Open
Abstract
Tenderness is the most important organoleptic characteristic of meat, and various methods have been developed to improve it. The purpose of this experiment was to evaluate the effect of different conditioning treatments of broiler carcasses on pH, cooking losses, shear values, R-values, and sensory tenderness of breast meat. All measurements were collected for breast muscle as follows: after 24 h of carcass aging (T1); after 24 h of carcass aging with muscle tensioning (T2); after 24 h of carcass aging with muscle tensioning, followed by muscle collection and marination in CaCl2 (T3); after hot-boning 15 min following slaughter (T4); after hot-boning 15 min following slaughter and marination in CaCl2 (T5). pH values in meat treated with CaCl2 were significantly lower than those in untreated meat from the aged carcass group (T3) or the hot-boning group (T5). Breasts from carcasses aged for 24 h (T1, T2, and T3) showed lower cooking loss than breasts harvested immediately after slaughter (T4 and T5). CaCl2 marination produced meats with cooking losses significantly higher than those observed for untreated meats. Regardless of muscle tensioning or marination treatments, aging of the carcass for 24 h (T1, T2, and T3) produced meats with lower shear values than those from hot-boned carcasses (T4 and T5). Hot-boned breasts treated with CaCl2 (T5) were judged less tender by panelists than breasts aged under muscle tensioning (T2 and T3).
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Affiliation(s)
- L M Seabra
- Departamento de Tecnologia de Alimentos, Universidade Federal do Ceará, Fortaleza, CE, Brazil
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de Souza GT, Rodrigues MC, Ciavaglia MC. [Analysis of the level of knowledge in the population of the teratogenic effect of alcohol and the activities of nurses]. Rev Bras Enferm 1996; 49:287-304. [PMID: 9220845 DOI: 10.1590/s0034-71671996000200013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 02/04/2023] Open
Abstract
Alcohol which, at first, is part of great ceremonies, parties, get-togethers, is now becoming an important issue, for the number of women who consume alcoholic beverages has increased, and consequently the number of pregnant women, considering that not only the mother's body but also the one of the child that is being formed, are under metabolic changes, and inevitably will be a target for acquired alcohol alterations (intake). During the human development, it is important to take into consideration the pregnancy stage and depending on it, the individual becomes susceptible to teratogenic agents. This paper aims at providing some contribution related to this social issue bringing knowledge on the action of alcohol on the fetus alterations, from the slightest (irritability, lack of attention, mobility deficiency) until Fetal Alcoholic Syndrome (F.A.S.) and also tries to analyse the extent of people knowledge on the consequences of alcohol effects over pregnant women bodies and the possible changes that may occur with the fetus. In order to make this study possible, interviews have been made by the use of forms with a population sample of about 100 people living in the northern, western, southern and interior low land regions. We have also visited some public and private institutions (23) on those regions, interviewing nurses in paediatric wards, aiming at identifying the difficulties found related to the diagnosis and management towards F.A.S.
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Prata MM, Nogueira AC, Pinto JR, Correia AM, Vicente O, Rodrigues MC, Miguel MJ. Long-term effect of lovastatin on lipoprotein profile in patients with primary nephrotic syndrome. Clin Nephrol 1994; 41:277-83. [PMID: 8050207] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Eight patients with biopsy-proven primary nephrotic syndrome were included in an open, prospective, two-year study of lovastatin. One patients was withdrawn after 6 months due to an asymptomatic rise in creatinine phosphokinase, which was rapidly reversed after interruption of lovastatin. In the remaining patients, treatment was well-tolerated and produced no side effects. After 2 years of treatment, these 7 patients had decreases in total cholesterol from 446 +/- 165 to 250 +/- 57 mg/dl (p < 0.001), LDL cholesterol from 343 +/- 121 to 174 +/- 49 mg/dl (p < 0.001), Apo B lipoprotein from 162 +/- 60 to 108 +/- 42 mg/dl (p < 0.05), triglycerides from 336 +/- 273 to 182 +/- 71 mg/dl (p < 0.04). There was no change in HDL cholesterol. The LDL/HDL cholesterol and the total/HDL cholesterol ratios fell from 15.0 +/- 12.1 and 19.1 +/- 17.2 mg/dl before the study to 4.4 +/- 1.2 and 6.3 +/- 1.6 mg/dl, respectively, at 2 years. A decrease in proteinuria from 8.6 +/- 4.6 to 5.0 +/- 3.7 g/24 h (p < 0.02) was noted in 4 patients on concomitant ACE inhibitor therapy. Renal function remained stable in all patients throughout the study, except for one whose moderate impairment progressed to end-stage renal failure requiring dialysis 3 months poststudy. We conclude that long-term lovastatin in patients with primary nephrotic syndrome is an effective and generally safe treatment for accompanying dyslipidemia.
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Affiliation(s)
- M M Prata
- Department of Nephrology, Hospital Universitario Santa Maria, Lisboa, Portugal
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31
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Abstract
Bradykinin is a potent vasodilator peptide; however, its half-life in vivo is very short because of various plasma and tissue peptidases that hydrolyze bradykinin to inactive fragments. We studied the role of kininase II (angiotensin converting enzyme) and neutral endopeptidase 24.11 (enkephalinase) in the catabolism of bradykinin in vascular tissue by determining the effect of inhibitors of kininase II (captopril) and of endopeptidase 24.11 (phosphoramidon) on the action of bradykinin on rat isolated mesenteric arteries. Because bradykinin may induce prostaglandin formation and release, we also studied the effect of a cyclooxygenase inhibitor, indomethacin, on the action of bradykinin. The mesenteric bed was isolated from rats (250-300 g) with rats under either anesthesia and was perfused with Krebs' solution (4 ml/min) containing phenylephrine (0.5-1.0 microgram/ml) to produce a mean perfusion pressure of 120-130 mm Hg. Bradykinin (2.5-40.0 ng), injected as a bolus, produced a dose-dependent decrease in perfusion pressure. In the presence of indomethacin (1.0 microgram/ml), the amplitude of the vasodilator responses to bradykinin was not significantly affected, although the duration of the responses was increased approximately two to four times. In the presence of captopril (1.0 microgram/ml), bradykinin elicited either a vasodilator or a biphasic effect. The vasodilator effect was greatly potentiated by captopril, whereas the duration of the response was unchanged when compared with control experiments. When present, the pressor responses were also dose related. In the presence of indomethacin plus captopril, bradykinin produced only a fall in perfusion pressure that lasted five to six times longer than without any treatment.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M C Salgado
- Department of Pharmacology, School of Medicine, Ribeirão Prêto, University of São Paulo, Brazil
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Costa AR, Porto E, Pegas JR, dos Reis VM, Pires MC, Lacaz CDS, Rodrigues MC, Müller H, Cucé LC. Rhinofacial zygomycosis caused by Conidiobolus coronatus. A case report. Mycopathologia 1991; 115:1-8. [PMID: 1922264 DOI: 10.1007/bf00436414] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [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: 12/29/2022]
Abstract
A case of rhinofacial zygomycosis with of years duration, caused by Conidiobolus coronatus is described. The patient, a 72-years-old woman, presented with a bilateral distortion of the subcutaneous tissue and disfigurement of the face. Treatment with ketoconazole and potassium iodide did not prevent several relapses. At present she is still under treatment with fluconazole with clinical healing. Histopathological and mycological examination confirmed the dermatological diagnosis. An increasing number of cases of zygomycosis caused by fungi of the order Entomophthorales have also been reported in the Northern and Northeastern States of Brazil.
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Affiliation(s)
- A R Costa
- Hospital do Servidor Público Estadual Francisco Morato de Oliveira, Serviço de Dermatologia, Brasil
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Costa AR, Porto E, Tabuti AH, Lacaz CDS, Sakai-Valente NY, Maranhão WM, Rodrigues MC. Subcutaneous phaeohyphomycosis caused by Bipolaris hawaiiensis. A case report. Rev Inst Med Trop Sao Paulo 1991; 33:74-9. [PMID: 1843402 DOI: 10.1590/s0036-46651991000100014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 12/29/2022] Open
Abstract
A case of phaeohyphomycosis caused by Bipolaris hawaiiensis is reported. The patient, an immunocompetent host, presented a verrucous lesion on the first finger of the left foot. Dematiaceous septate hyphae and yeast-like elements were seen in direct and histological examination. The isolated strain was identified on the basis of micro and macromorphological aspects. Treated with electrocoagulation, the lesions healed and presented no relapse after two years follow-up.
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Affiliation(s)
- A R Costa
- Hospital do Servidor Público Estadual Francisco Morato de Oliveira, Serviço de Dermatologia, São Paulo, Brasil
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Costa AR, Porto E, Tayah M, Valente NY, Lacaz CDS, Maranhão WM, Rodrigues MC. Subcutaneous mucormycosis caused by Mucor hiemalis Wehmer f. luteus (Linnemann) Schipper 1973. Mycoses 1990; 33:241-6. [PMID: 2267000 DOI: 10.1111/myc.1990.33.5.241] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [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: 12/31/2022]
Abstract
The authors report a case of subcutaneous mucormycosis in a diabetic patient with verrucous lesions in the fourth finger of the right hand. Initially diagnosed as a fixed cutaneous sporotrichosis case, success was obtained with the use of potassium iodide with healing of the lesion in a period of nearly 5 months. At present the patient remains under clinical observation with no treatment or relapse.
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Affiliation(s)
- A R Costa
- Serviço de Dermatologia, Hospital do Servidor Público Estadual Francisco Morato de Oliveria, Brazil
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35
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Mendez MH, Derivi SC, Rodrigues MC, Da Silva MF. [Comparative study of analytical methods for determination of dietary fiber insoluble fraction, in starch rich foods]. Arch Latinoam Nutr 1990; 40:107-15. [PMID: 1966506] [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: 12/29/2022]
Abstract
The objective of this work was to compare two enzymatic methods for determination of the neutral detergent fiber (NDF) in starch-rich foods. The samples analyzed were foods from the legume group, cereals and derivatives, roots, tubers and similars. The results obtained by the Robertson and Van Soest method showed markedly higher values of the NDF fraction when compared with those found following the procedure of Mendez et al. The percentage differences in NDF values found between the two methods were not constant in the food samples analyzed. These differences were not related with the starch content present in the samples nor with the type of processing to which the foods were subjected. The Mendez et al. method is recommended for the samples tested.
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Affiliation(s)
- M H Mendez
- Universidade Federal Fluminense, Río de Janeiro, Brasil
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37
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Rodrigues HL, Prata MM, Rodrigues MC, da Costa AG, Barbas JM, de Almeida OM. [Renal insufficiency with primary hyperaldosteronism]. ACTA MEDICA PORT 1989; 2:27-30. [PMID: 2773678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We describe a case of advanced chronic renal failure with persisting hypokalemia. The clinical study revealed the simultaneous presence of a salt and potassium loosing nephropathy associated with aldosterone-producing adenoma. This late pathology was revealed as electrolytic changes characteristic of primary hyperaldosteronism became evident as the renal function progressively deteriorated.
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Chikamori T, Saka S, Nagano H, Saeki S, Lacaz CDS, Rodrigues MC, Cassaguerra CM, Braccialli ML. Paracoccidioidomycosis in Japan. Report of a case. Rev Inst Med Trop Sao Paulo 1984; 26:267-71. [PMID: 6099907 DOI: 10.1590/s0036-46651984000500007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Os Autores descrevem um caso de paracoccidioidomicose em Tóquio, o segundo observado no Japão. A paciente residiu cerca de cinco anos na zona urbana de São Paulo, onde provavelmente adquiriu a primo-infecção. Não tomou corticóides, nem teve história de outras afecções que justificassem a paracoccidioidomicose. Após três anos do retorno ao Japão apresentou linfadenopatia, comprometimento hepatesplênico e ausência de lesões pulmonares. O presente caso, com exame histopatoló-gico e cultivo positivos para Paracoccidioides brasiliensis também apresentou quadro soroló-gico compatível. O aspecto blástico das lesões ósseas, raro em arcos costáis nesta micose, bem como a linfadenopatia generalizada são discutidos. Tratamento à base de anfotericina B e ketoconazol ofereceu resultados favoráveis. Neste trabalho os Autores discutem o problema de "patologia de importação", com suas implicações.
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Rodrigues MC, Cassaguerra CM, Lacaz CDS. Antigenemia in paracoccidioidomycosis. Probable demonstration of circulating antigen by counterimmunoelectrophoresis test. Preliminary report. Rev Inst Med Trop Sao Paulo 1984; 26:285-7. [PMID: 6533751 DOI: 10.1590/s0036-46651984000500011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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40
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Sabbaga E, Lacaz CDS, Saldanha LB, de Azevedo LS, El Ibrahim R, de Siqueira AM, Rodrigues MC. [Disseminated histoplasmosis in renal transplant patients]. Rev Inst Med Trop Sao Paulo 1984; 26:170-6. [PMID: 6390658 DOI: 10.1590/s0036-46651984000300008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Os Autores registram caso de histoplasmose generalizada em paciente transplantado com rim de doador não aparentado. Além da infecção fúngica diagnosticada sorologicamente e pela histopatologia, a autópsia revelou cirrose hepática macro e micronodular, de provável etiologia viral (vírus B), hepatocarcinoma, depleção linfóide do baço e glomerulopatia de transplante. Revendo a literatura sobre o assunto, chegam à conclusão de que, provavelmente, com a imunodepressão medicamentosa, as lesões pulmonares por reinfecção endógena foram as primeiras a aparecer sob a forma de uma histoplasmose pulmonar crônica.
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41
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de Andrade JA, de Andrade TM, Lacaz CDS, Rodrigues MC, Preuss M, Lorenço R, Badaró R. [Survey on paracoccidioidin in a population of Bahia (Brazil)]. Rev Inst Med Trop Sao Paulo 1984; 26:1-6. [PMID: 6611574 DOI: 10.1590/s0036-46651984000100001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
No Município de Una, localizado ao Sul do Estado da Bahia, em área com registro freqüente de casos de leishmaniose tegumentar, foram estudados 177 indivíduos, na faixa etária entre três meses e 73 anos, através de provas intradérmicas com paracoccidioidina (antígeno péptido-polissacarídico do Paracoccidioides brasiliensis). Positividade foi obtida em dez indivíduos (5,6%). Somente foi considerada positiva a reação que apresentava enduração igual ou maior que 5 mm. Em nenhum dos casos positivos à paracoccidioidina havia evidência clínica de lesões blastomicóticas. Com os soros dos indivíduos positivos à paracoccidioidina, foram realizadas provas de imunodifusão dupla e contraimunoeletroforese, com resultados negativos para anticorpos circulantes anti-P. brasiliensis. Este dado indica que, em nenhum dos reatores à paracoccidioidina, havia processo infeccioso em atividade. O percentual de positividade obtido com a paracoccidioidina, em que pesem eventuais reações cruzadas com histoplasmose, sugere a ocorrência da paracoccidioidomicose na área estudada.
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Abstract
Two of six patients (four women and two men ranging in age from 51 to 90 years) with bilateral senile iridoschisis also had secondary unilateral narrow angle or angle-closure glaucoma. All six patients had splitting of the iris stroma inferiorly. Histopathologic studies disclosed marked iris stromal atrophy without evidence of vascular or neural alterations. Vessels were present in the separated anterior stroma. Electron microscopy of iridectomy specimens from three patients and a corneal button from one disclosed scant or absent collagen fibrils in the area of separation. The cornea showed focal loss of endothelial cells, patchy posterior banding (110 nm) of Descemet's membrane, and stromal and epithelial edema. The posterior corneal surface showed degenerated endothelial cells and irregular connective tissue most marked inferiorly; the endothelial cells appeared to be normal.
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43
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Rodrigues MC, Ferri RG, Baruzzi RG. Study of serum proteins in Indians from the Alto Xingu, Central Brazil. Rev Inst Med Trop Sao Paulo 1981; 23:102-5. [PMID: 7280475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Rodrigues MC, Carvalho RP, Baruzzi RG. [Detection of neutralizing antibodies against herpes simplex virus in Indians of the upper Xingu, central Brazil]. Rev Inst Med Trop Sao Paulo 1973; 15:20-4. [PMID: 4703902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Baruzzj RG, Rodrigues MC, Carvalho RP, de Souza-Dias LC. [Detection of neutralizing antibodies against measles virus in Indians of Xingu, Central Brazil]. Rev Inst Med Trop Sao Paulo 1971; 13:356-62. [PMID: 5162259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Neves WE, Rodrigues MC, Kipnis J, Carvalho RP, Amato Neto V. [Poliomyelitis vaccination, Sabin type, in 1-month-old and 3-month-old infants]. Rev Inst Med Trop Sao Paulo 1968; 10:376-82. [PMID: 4303642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Rodrigues MC, de Carvalho RP. [Study of age distribution of neutralizing antibodies against herpes simple virus in São Paulo]. Rev Inst Med Trop Sao Paulo 1965; 7:323-6. [PMID: 4285314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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