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Silva FRF, Heredia JE, Duffles LF, Arntz OJ, Teixeira MM, Ferreira AVM, Silva TA, van de Loo FAJ, Macari S, Oliveira MC. Protective Effect of Bovine Milk Extracellular Vesicles on Alveolar Bone Loss. Mol Nutr Food Res 2024; 68:e2300445. [PMID: 38087782 DOI: 10.1002/mnfr.202300445] [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: 06/28/2023] [Revised: 10/17/2023] [Indexed: 02/10/2024]
Abstract
SCOPE Bovine milk extracellular vesicles (MEVs) have demonstrated therapeutic potential in regulating bone cell activity. However, the outcome of their use on alveolar bone loss has not yet been demonstrated. METHODS AND RESULTS This study evaluates the effect of oral administration of MEVs on ovariectomized (OVX) mice. There is a reduced height of the alveolar bone crest in OVX mice by MEVs treatment, but the alveolar bone parameters are not altered. OVX mice are then submitted to a force-induced bone remodeling model by orthodontic tooth movement (OTM). MEVs-treated mice have markedly less bone remodeling movement, unlike the untreated OVX mice. Also, OVX mice treated with MEVs show an increased number of osteoblasts and osteocytes associated with higher sclerostin expression and reduce osteoclasts in the alveolar bone. Although the treatment with MEVs in OVX mice does not show differences in root structure in OTM, few odontoclasts are observed in the dental roots of OVX-treated mice. Compared to untreated mice, maxillary and systemic RANKL/OPG ratios are reduced in OVX mice treated with MEVs. CONCLUSION Treatment with MEVs results in positive bone cell balance in the alveolar bone and dental roots, indicating its beneficial potential in treating alveolar bone loss in the nutritional context.
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Affiliation(s)
- Francine R F Silva
- Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Joyce E Heredia
- Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Letícia F Duffles
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Onno J Arntz
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Mauro M Teixeira
- Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Adaliene V M Ferreira
- Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tarcilia A Silva
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fons A J van de Loo
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Soraia Macari
- Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marina C Oliveira
- Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Sola GS, Costa MRN, Silva TA, Costa MRL, Souza RR, Peters LP, Carvalho CM, Silva BKA. Antimicrobial potential of extracts from leaves and culms of an Amazonian native bamboo. BRAZ J BIOL 2023; 83:e277199. [PMID: 38055582 DOI: 10.1590/1519-6984.277199] [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: 08/08/2023] [Accepted: 10/08/2023] [Indexed: 12/08/2023] Open
Abstract
Antibiotics have shown less efficiency against resistance of pathogenic microorganisms. As a result, research centers have sought therapeutic alternatives against multidrug resistance of bacteria to antibiotics, one of which is using plant extracts. Bamboo extracts are used for several medicinal purposes. This study aimed to evaluate the antibacterial potential of hydroalcoholic extracts of culms and leaves of the species Guadua aff. lynnclarkiae on strains of Staphylococcus aureus, Streptococcus pneumoniae, and Klebsiella pneumoniae. We evaluated the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC). Only the leaves of G. aff. lynnclarkiae showed a bactericidal effect for all tested strains with MBC ranging from 1.55 mg ml-1 to 25 mg ml-1. The culms had bacteriostatic action with MIC ranging from 1.55 mg ml-1 to 6.25 mg ml-1, and bactericidal action at the concentration of 6.25 mg ml-1 only for S. aureus. This study provides bases for the use of this Amazonian native bamboo in bioprospecting.
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Affiliation(s)
- G S Sola
- Universidade Federal do Acre, Centro de Ciências Biológicas e da Natureza, Rio Branco, AC, Brasil
| | - M R N Costa
- Universidade Federal do Acre, Programa de Pós-graduação em Ciência, Inovação e Tecnologia para a Amazônia, Rio Branco, AC, Brasil
| | - T A Silva
- Universidade Federal do Acre, Programa de Pós-graduação em Ciência, Inovação e Tecnologia para a Amazônia, Rio Branco, AC, Brasil
| | - M R L Costa
- Universidade Federal do Acre, Programa de Pós-graduação em Ciência, Inovação e Tecnologia para a Amazônia, Rio Branco, AC, Brasil
| | - R R Souza
- Universidade Federal do Acre, Programa de Pós-graduação em Ciência, Inovação e Tecnologia para a Amazônia, Rio Branco, AC, Brasil
| | - L P Peters
- Universidade Federal do Acre, Centro de Ciências da Saúde e Desporto, Rio Branco, AC, Brasil
| | - C M Carvalho
- Universidade Federal do Acre, Centro de Ciências Biológicas e da Natureza, Rio Branco, AC, Brasil
| | - B K A Silva
- Universidade Federal do Acre, Centro de Ciências Biológicas e da Natureza, Rio Branco, AC, Brasil
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3
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Marangon BB, Magalhães IB, Pereira ASAP, Silva TA, Gama RCN, Ferreira J, Castro JS, Assis LR, Lorentz JF, Calijuri ML. Emerging microalgae-based biofuels: Technology, life-cycle and scale-up. Chemosphere 2023; 326:138447. [PMID: 36940833 DOI: 10.1016/j.chemosphere.2023.138447] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/23/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Microalgae biomass is a versatile feedstock with a variable composition that can be submitted to several conversion routes. Considering the increasing energy demand and the context of third-generation biofuels, algae can fulfill the increasing global demand for energy with the additional benefit of environmental impact mitigation. While biodiesel and biogas are widely consolidated and reviewed, emerging algal-based biofuels such as biohydrogen, biokerosene, and biomethane are cutting-edge technologies in earlier stages of development. In this context, the present study covers their theoretical and practical conversion technologies, environmental hotspots, and cost-effectiveness. Scaling-up considerations are also addressed, mainly through Life Cycle Assessment results and interpretation. Discussions on the current literature for each biofuel directs researchers towards challenges such as optimized pretreatment methods for biohydrogen and optimized catalyst for biokerosene, besides encouraging pilot and industrial scale studies for all biofuels. While presenting studies for larger scales, biomethane still needs continuous operation results to consolidate the technology further. Additionally, environmental improvements on all three routes are discussed in light of life-cycle models, highlighting the ample research opportunities on wastewater-grown microalgae biomass.
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Affiliation(s)
- B B Marangon
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - I B Magalhães
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - A S A P Pereira
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - T A Silva
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - R C N Gama
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - J Ferreira
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - J S Castro
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - L R Assis
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - J F Lorentz
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
| | - M L Calijuri
- Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa/UFV), Av. Peter Henry Rolfs, S/n, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
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4
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Silva MKS, Silva TA, Silva JAF, Costa LDA, Leal MLE, Bezerra RS, Costa HMS, Freitas-Júnior ACV. Carangoides bartholomaei (Cuvier, 1833) stomach: a source of aspartic proteases for industrial and biotechnological applications. BRAZ J BIOL 2021; 82:e234413. [PMID: 34105658 DOI: 10.1590/1519-6984.234413] [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: 02/25/2020] [Accepted: 08/02/2020] [Indexed: 11/22/2022] Open
Abstract
The viscera and other residues from fish processing are commonly discarded by the fishing industry. These by-products can be a source of digestive enzymes with industrial and biotechnological potential. In this study, we aimed at the extraction, characterization, and application of acidic proteases from the stomach of Carangoides bartholomaei (Cuvier, 1833). A crude extract from the stomachs was obtained and submitted to a partial purification process by salting-out, which obtained a Purified Extract (PE) with a specific proteolytic activity of 54.0 U⋅mg-1. A purification of 1.9 fold and a yield of 41% were obtained. The PE presents two isoforms of acidic proteases and a maximum proteolytic activity at 45 °C and pH 2.0. The PE acidic proteolytic activity was stable in the pH range of 1.5 to 7.0 and temperature from 25 °C to 50 °C. Purified Extract kept 35% of its proteolytic activity at the presence of NaCl 15% (m/v) but was totally inhibited by pepstatin A. Purified Extract aspartic proteases presented high activity in the presence of heavy metals such as Cd2+, Hg2+, Pb2+, Al3+, and Cu2+. The utilization of PE as an enzymatic addictive in the collagen extraction from Nile tilapia scales has doubled the process yield. The results indicate the potential of these aspartic proteases for industrial and biotechnological applications.
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Affiliation(s)
- M K S Silva
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, João Pessoa, PB, Brasil
| | - T A Silva
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, João Pessoa, PB, Brasil
| | - J A F Silva
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, João Pessoa, PB, Brasil
| | - L D A Costa
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil
| | - M L E Leal
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil
| | - R S Bezerra
- Universidade Federal de Pernambuco - UFPE, Centro de Biociências, Departamento de Bioquímica, Laboratório de Enzimologia, Recife, PE, Brasil
| | - H M S Costa
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, João Pessoa, PB, Brasil
| | - A C V Freitas-Júnior
- Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Departamento de Biologia Molecular, Laboratório de Biomoléculas de Organismos Aquáticos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, João Pessoa, PB, Brasil
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5
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Silva JAF, Silva MKS, Silva TA, Costa LDA, Leal MLE, Bezerra RS, Costa HMS, Freitas-Júnior ACV. Obtainment and characterization of digestive aspartic proteases from the fish Caranx hippos (Linnaeus, 1766). BRAZ J BIOL 2021; 82:e234500. [PMID: 33787732 DOI: 10.1590/1519-6984.234500] [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: 02/27/2020] [Accepted: 07/25/2020] [Indexed: 11/21/2022] Open
Abstract
This work aimed to obtain aspartic proteases of industrial and biotechnological interest from the stomach of the crevalle jack fish (Caranx hippos). In order to do so, a crude extract (CE) of the stomach was obtained and subjected to a partial purification by salting-out, which resulted in the enzyme extract (EE) obtainment. EE proteases were characterized physicochemically and by means of zymogram. In addition, the effect of chemical agents on their activity was also assessed. By means of salting-out it was possible to obtain a purification of 1.6 times with a yield of 49.4%. Two acid proteases present in the EE were observed in zymogram. The optimum temperature and thermal stability for EE acidic proteases were 55 ºC and 45 °C, respectively. The optimum pH and pH stability found for these enzymes were pH 1.5 and 7.0, respectively. Total inhibition of EE acid proteolytic activity was observed in the presence of pepstatin A. dithiothreitol (DTT) and Ca2+ did not promote a significant effect on enzyme activity. In the presence of heavy metals, such as Al3+, Cd2+ and Hg2+, EE acidic proteases showed more than 70% of their enzymatic activity. The results show that it is possible to obtain, from the stomach of C. hippos, aspartic proteases with high proteolytic activity and characteristics that demonstrate potential for industrial and biotechnological applications.
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Affiliation(s)
- J A F Silva
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, Cidade Universitária, João Pessoa, PB, Brasil
| | - M K S Silva
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, Cidade Universitária, João Pessoa, PB, Brasil
| | - T A Silva
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, Cidade Universitária, João Pessoa, PB, Brasil
| | - L D A Costa
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil
| | - M L E Leal
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil
| | - R S Bezerra
- Universidade Federal de Pernambuco - UFPE, Centro de Biociências, Departamento de Bioquímica, Laboratório de Enzimologia, Cidade Universitária, Recife, PE, Brasil
| | - H M S Costa
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, Cidade Universitária, João Pessoa, PB, Brasil
| | - A C V Freitas-Júnior
- Universidade Federal da Paraíba - UFPB, Laboratório de Biomoléculas de Organismos Aquáticos, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Cidade Universitária, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências Exatas e da Natureza, Programa de Pós-graduação em Biologia Celular e Molecular, Cidade Universitária, João Pessoa, PB, Brasil
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6
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Oliveira MC, Pieters BCH, Guimarães PB, Duffles LF, Heredia JE, Silveira ALM, Oliveira ACC, Teixeira MM, Ferreira AVM, Silva TA, van de Loo FAJ, Macari S. Bovine Milk Extracellular Vesicles Are Osteoprotective by Increasing Osteocyte Numbers and Targeting RANKL/OPG System in Experimental Models of Bone Loss. Front Bioeng Biotechnol 2020; 8:891. [PMID: 32850743 PMCID: PMC7411003 DOI: 10.3389/fbioe.2020.00891] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 07/10/2020] [Indexed: 12/24/2022] Open
Abstract
Studying effects of milk components on bone may have a clinical impact as milk is highly associated with bone maintenance, and clinical studies provided controversial associations with dairy consumption. We aimed to evaluate the impact of milk extracellular vesicles (mEVs) on the dynamics of bone loss in mice. MEVs are nanoparticles containing proteins, mRNA and microRNA, and were supplemented into the drinking water of mice, either receiving diet-induced obesity or ovariectomy (OVX). Mice receiving mEVs were protected from the bone loss caused by diet-induced obesity. In a more severe model of bone loss, OVX, higher osteoclast numbers in the femur were found, which were lowered by mEV treatment. Additionally, the osteoclastogenic potential of bone marrow-derived precursor cells was lowered in mEV-treated mice. The reduced stiffness in the femur of OVX mice was consequently reversed by mEV treatment, accompanied by improvement in the bone microarchitecture. In general, the RANKL/OPG ratio increased systemically and locally in both models and was rescued by mEV treatment. The number of osteocytes, as primary regulators of the RANKL/OPG system, raised in the femur of the OVX mEVs-treated group compared to OVX non-treated mice. Also, the osteocyte cell line treated with mEVs demonstrated a lowered RANKL/OPG ratio. Thus, mEVs showed systemic and local osteoprotective properties in two mouse models of bone loss reflected in reduced osteoclast presence. Data reveal mEV potential in bone modulation, acting via osteocyte enhancement and RANKL/OPG regulation. We suggest that mEVs could be a therapeutic candidate for the treatment of bone loss.
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Affiliation(s)
- Marina C Oliveira
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Experimental Rheumatology, Radboud University Medical Center, Nijmegen, Netherlands.,Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Bartijn C H Pieters
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Polianna B Guimarães
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Letícia F Duffles
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Joyce E Heredia
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana L M Silveira
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Amanda C C Oliveira
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro M Teixeira
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Adaliene V M Ferreira
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tarcilia A Silva
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fons A J van de Loo
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Soraia Macari
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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7
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Boriollo MFG, Alves VE, Silva TA, Silva JJ, Barros GBS, Dias CTS, Höfling JF, Oliveira NMS. Decrease of the DXR-induced genotoxicity and nongenotoxic effects of Theobroma cacao revealed by micronucleus assay. BRAZ J BIOL 2020; 81:268-277. [PMID: 32696851 DOI: 10.1590/1519-6984.223687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 11/04/2019] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the genotoxicity of lyophilized glycolic extract of Theobroma cacao Linné seeds (TCL), using the micronucleus assay in bone marrow of mice. The interaction between TCL and doxorubicin (DXR) was also analyzed. Experimental groups were evaluated 24-48 h after treatment with N-Nitroso-N-ethylurea (NEU: 50 mg/kg), DXR (5 mg/kg), NaCl (145 mM), TCL (0.5-2 g/kg), and TCL (2 g/kg) in combination with DXR (antigenotoxic assays). Analysis of micronucleated polychromatic erythrocytes (MNPCEs) showed no significant differences between all the treatment doses of TCL and NaCl control. Mice experimentally treated with DXR and NEU significantly induced MNPCEs. However, a significant reduction of MNPCEs was also observed when TCL was administered in combination with the chemotherapeutic agent DXR. The analysis of the PCE/NCE ratio revealed no significant differences between the NaCl control, all doses of TCL, and DXR. However, there were significant differences in the PCE/NCE ratio between positive NEU control and all other treatments. The PCE/NCE ratio observed after treatment with TCL and DXR showed significant differences and intermediate values to controls (NaCl and NEU). This study suggests absence of genotoxicity and cytotoxicity of TCL, regardless of dose, sex, and time. TCL reduced genotoxic effects induced by DXR, suggesting potential antigenotoxic effects.
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Affiliation(s)
- M F G Boriollo
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - V E Alves
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - T A Silva
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - J J Silva
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - G B S Barros
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - C T S Dias
- Departamento de Ciências Exatas, Escola de Agricultura "Luiz de Queiroz" - ESALQ, Universidade de são Paulo - USP, Av. Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brasil
| | - J F Höfling
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - N M S Oliveira
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
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8
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Comim FV, Comim FV, Mujica LKS, Macari S, Silva TA, Barrioni BR, Stein CS, Valente F, Miyazato LG, Antoniazzi AQ, Moresco RN, Premaor MO. SUN-023 Changes in Microct Bone Density and Reduced Bone Formation in a “Postmenopausal” PCOS Rat Model. J Endocr Soc 2020. [PMCID: PMC7208756 DOI: 10.1210/jendso/bvaa046.1728] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) affects women during their entire lifespan. Evidence from the literature suggests an association of PCOS with decreased bone formation markers (osteocalcin and P1NP), although no conclusive data about the incidence of fractures exist. In the present study, we investigated the consequences of androgenization in rats on bone markers and femur microCT and the changes in these parameters after ovariectomy. This study was approved by the local Animal Ethics Committee. Briefly, Wistar rats (n= 38) were divided in 4 groups: 1) “Control OVX” (single dose of corn oil s.c. at day 5 of life and ovariectomy at day 100, n=9); 2) “Control SHAM” (n=9); 3) “Androgenized OVX”(single dose of testosterone propionate 1.25 mg s.c. at day 5 of life and ovariectomy at day 100, n=10); and 4) “Androgenized SHAM” (n=10). Full characterization of estrous cycles and weight was performed during growth, and all animals were euthanized at day 180 during metestrus/diestrous. Evaluation of glucose levels, lipids, estradiol, P1NP levels (a marker of bone formation), and analysis of the femur micro CT Skyscan 1174 (Aartselaar, Belgium) was performed in at least eight animals of each group. Ovariectomy increased the weight of Androgenized OVX rats on day 180: these animals were heavier than Control OVX, Control SHAM, or Androgenized SHAM (ANOVA p<0.001). However, metabolic changes were observed in ovary-intact Androgenized SHAM rats who exhibited higher total cholesterol (ANOVA p<0.001), increased LDL (ANOVA p=0.03), and elevated TyG index, a marker of insulin resistance (ANOVA p<0.001) against all other three groups. This group (Androgenized SHAM rats)also exhibited an increase in MicroCt bone density (g/cm-3) (mean + SEM) of 1.117 + 0.06 against the other - Control SHAM 0.8433 + 0.03, Control OVX 0.5527 + 0.001, and Androgenized OVX 0.6284 + 0.02 (ANOVA p< 0.001). Although the values of bone density between Control OVX and Androgenized OVX groups were similar, gonadal removal produced a different pattern of bone density reduction between Control OVX and Androgenized OVX (Two-Way ANOVA p=0.001). Moreover, we found P1NP levels significantly decreased in the Androgenized OVX group (mean + SEM) of 58.57 + 4.41 ng/ml against 88.02 + 8.49 ng/ml in Control OVX versus (ANOVA p<0.0001) indicating lower bone formation. Our results suggest that bone and metabolic features of Androgenized rats are affected by ovariectomy with a negative impact on bone formation.
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9
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Montalvany-Antonucci CC, Duffles LF, de Arruda JAA, Zicker MC, de Oliveira S, Macari S, Garlet GP, Madeira MFM, Fukada SY, Andrade I, Teixeira MM, Mackay C, Vieira AT, Vinolo MA, Silva TA. Short-chain fatty acids and FFAR2 as suppressors of bone resorption. Bone 2019; 125:112-121. [PMID: 31100533 DOI: 10.1016/j.bone.2019.05.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/30/2019] [Accepted: 05/13/2019] [Indexed: 12/21/2022]
Abstract
Short-chain fatty acids (SCFAs) exert a variety of immune and metabolic functions by binding to G-protein-coupled receptors, mainly free fatty acid receptor 2 (FFAR2). However, the effects of SCFAs and FFARs on bone remodeling, especially in alveolar bone, have been less explored. In this study, we investigated the influence of the SCFA/FFAR2 axis on alveolar bone. Bone samples from wild-type (WT) and FFAR2-deficient mice (FFAR2-/-) were analyzed using micro-CT, histology and qPCR. WT and FFAR2-/- animals received a high-fiber diet (HFD) reported to increase circulating levels of SCFAs. Additionally, we analyzed the effects of SCFAs and a synthetic FFAR2 agonist, phenylacetamide-1 (CTMB), on bone cell differentiation. The participation of histone deacetylase inhibitors (iHDACs) in the effects of SCFAs was further assessed in vitro. CTMB treatment was also evaluated in vivo during orthodontic tooth movement (OTM). FFAR2-/- mice exhibited deterioration of maxillary bone parameters. Consistent with this, FFAR2-/- mice exhibited a significant increase of OTM and changes in bone cell numbers and in the expression of remodeling markers. The HFD partially reversed bone loss in the maxillae of FFAR2-/- mice. In WT mice, the HFD induced changes in the bone markers apparently favoring a bone formation scenario. In vitro, bone marrow cells from FFAR2-/- mice exhibited increased differentiation into osteoclasts, while no changes in osteoblasts were observed. In line with this, differentiation of osteoclasts was diminished by SCFAs and CTMB. Moreover, CTMB treatment significantly reduced OTM. Pretreatment of osteoclasts with iHDACs did not modify the effects of SCFAs on these cells. In conclusion, SCFAs function as regulators of bone resorption. The effects of SCFAs on osteoclasts are dependent on FFAR2 activation and are independent of the inhibition of HDACs. FFAR2 agonists may be useful to control bone osteolysis.
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Affiliation(s)
- C C Montalvany-Antonucci
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Federal University of Minas Gerais, MG, Brazil; Department of Orthodontics, Faculty of Dentistry, Pontifical Catholic University, Belo Horizonte, MG, Brazil
| | - L F Duffles
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Federal University of Minas Gerais, MG, Brazil
| | - J A A de Arruda
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Federal University of Minas Gerais, MG, Brazil
| | - M C Zicker
- Department of Food Science, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - S de Oliveira
- Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, SP, Brazil
| | - S Macari
- Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - G P Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, University of São Paulo, Bauru, SP, Brazil
| | - M F M Madeira
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - S Y Fukada
- Department of Pharmacological Science, Faculty of Pharmacy, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - I Andrade
- Department of Orthodontics, Faculty of Dentistry, Pontifical Catholic University, Belo Horizonte, MG, Brazil
| | - M M Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - C Mackay
- Department of Immunology, Monash University, Melbourne, Australia
| | - A T Vieira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - M A Vinolo
- Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, SP, Brazil
| | - T A Silva
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Federal University of Minas Gerais, MG, Brazil.
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10
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Guerrero-Vargas JA, Silva TA, Macari S, de Las Casas EB, Garzón-Alvarado DA. Influence of interdigitation and expander type in the mechanical response of the midpalatal suture during maxillary expansion. Comput Methods Programs Biomed 2019; 176:195-209. [PMID: 31200906 DOI: 10.1016/j.cmpb.2019.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/02/2019] [Accepted: 05/11/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND OBJECTIVE The orthopedic Maxillary Expansion (ME) procedure is used for treating the transverse maxillary deficiency. This pathology consists in a smaller transverse dimension in the maxilla and leads to malocclusion. The treatment takes advantage of the existence of the midpalatal suture (MPS), which corresponds to the junction at the palatine bones of its horizontal portions. The technique employs a device, conventionally a palatal expander attached to the posterior teeth, to separate the two maxillary bones in the MPS. The objective of this study was to analyze, using the Finite Element Method, the biomechanical behavior of the MPS when an expansion is applied. METHODS A Computer Tomography image of the maxilla was reconstructed, the suture geometry was modeled with different interdigitation levels and types of hyrax devices. A total of 12 geometric models (three levels for interdigitation and four types of hyrax devices) were prepared and analyzed taking into account the chewing forces and the expansion displacement. For each case, maximum principal stresses on the maxilla (bone), and equivalent stresses on the expander device (stainless steel) were observed. In the MPS, maximum principal stresses and directional displacement were evaluated. RESULTS The results showed that the interdigitation does not have an important influence on the deformation behavior of the maxilla but it affects the stress distribution. In addition, the type of expander device and anchorage have a direct relationship with the treatment effectiveness; larger deformation in the expansion direction was obtained with skeletal when compared to dental anchorage. CONCLUSIONS A study that allows a better understanding of the oral biomechanics during the application of ME was presented. To our knowledge, it is the first study based on computational simulations that takes into account bone structures, like maxilla and part of the skull, to analyze the interdigitation influence on the MPS behavior when exposed to a ME.
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Affiliation(s)
- J A Guerrero-Vargas
- Department of Mechanical and Mechatronic Engineering, Faculty of Engineering, Universidad Nacional de Colombia, Bogotá, Colombia; Department of Mechanical Engineering, School of Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Department of Mechanical Engineering, Faculty of Engineering, Universidad ECCI, Bogotá, Colombia.
| | - T A Silva
- Department of Clinical, Pathology and Dental Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - S Macari
- Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - E B de Las Casas
- Department of Structural Engineering, School of Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - D A Garzón-Alvarado
- Department of Mechanical and Mechatronic Engineering, Faculty of Engineering, Universidad Nacional de Colombia, Bogotá, Colombia
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11
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Mendonça SMS, Corrêa JD, Souza AF, Travassos DV, Calderaro DC, Rocha NP, Vieira ÉLM, Teixeira AL, Ferreira GA, Silva TA. Immunological signatures in saliva of systemic lupus erythematosus patients: influence of periodontal condition. Clin Exp Rheumatol 2019; 37:208-214. [PMID: 30148445] [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] [Received: 02/23/2018] [Accepted: 05/14/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVES The immune system has an important role in the development of systemic lupus erythematosus (SLE) and chronic periodontitis (CP). Altered cytokines levels characterise both diseases and contributes to periodontal tissue damage in CP and to macrocomplexes deposition with connective tissue destruction in SLE. This study aimed to evaluate the production of salivary cytokines in patients with SLE and its association with periodontal status. METHODS The sample comprised 70 SLE patients and 70 paired controls. SLE activity and damage were scored using Systemic Lupus Erythematosus Disease Activity Index 2000 and Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index. Subjects were classified as without or with CP. Salivary concentrations of IL-33, MMP2/TIMP2, RANK and OPG were measured by ELISA, while IL-2, IFNγ, TNFα, IL-4, IL-6, IL-10 and IL-17A were determined by Cytometric Bead Array. Linear regression models analysed association among SLE, CP and salivary cytokines. RESULTS IL-6 and IL-17A concentrations were significantly higher in SLE/CP patients than controls/CP. Concentrations of IL-6, IL-17A and IL-33 were increased in SLE/CP individuals when compared to SLE without CP. Multivariate model revealed association of cumulative dose of corticoids with periodontal damage and of IL-33 salivary concentration with SLE activity. CONCLUSIONS Our findings suggest that long-term therapy with corticoids would contribute with periodontal destruction in SLE patients. Moreover, the increased levels of IL-6, IL-17A and IL-33 in saliva of SLE subjects with CP may signal it as possible inflammatory pathways in this process.
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Affiliation(s)
- Santuza M S Mendonça
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Jôice D Corrêa
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Alessandra F Souza
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Denise V Travassos
- Department of Community and Preventive Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Débora C Calderaro
- Department of Locomotor System, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Natalia P Rocha
- Department of Internal Medicine, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Érica L M Vieira
- Department of Internal Medicine, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Antônio L Teixeira
- Department of Internal Medicine, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Gilda A Ferreira
- Department of Locomotor System, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tarcilia A Silva
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
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12
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Abstract
Periodontal diseases are initiated by bacteria that accumulate in a biofilm on the tooth surface and affect the adjacent periodontal tissue. Systemic diseases such as diabetes, rheumatoid arthritis (RA), and systemic lupus erythematosus (SLE) increase susceptibility to destructive periodontal diseases. In human studies and in animal models, these diseases have been shown to enhance inflammation in the periodontium and increase the risk or severity of periodontitis. All 3 systemic diseases are linked to a decrease in bacterial taxa associated with health and an increase in taxa associated with disease. Although there is controversy regarding the specific oral bacterial changes associated with each disease, it has been reported that diabetes increases the levels of Capnocytophaga, Porphyromonas, and Pseudomonas, while Prevotella and Selenomonas are increased in RA and Selenomonas, Leptotrichia, and Prevotella in SLE. In an animal model, diabetes increased the pathogenicity of the oral microbiome, as shown by increased inflammation, osteoclastogenesis, and periodontal bone loss when transferred to normal germ-free hosts. Moreover, in diabetic animals, the increased pathogenicity could be substantially reversed by inhibition of IL-17, indicating that host inflammation altered the microbial pathogenicity. Increased IL-17 has also been shown in SLE, RA, and leukocyte adhesion deficiency and may contribute to oral microbial changes in these diseases. Successful RA treatment with anti-inflammatory drugs partially reverses the oral microbial dysbiosis. Together, these data demonstrate that systemic diseases characterized by enhanced inflammation disturb the oral microbiota and point to IL-17 as key mediator in this process.
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Affiliation(s)
- D T Graves
- 1 Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - J D Corrêa
- 2 Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - T A Silva
- 2 Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
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13
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Boff D, Crijns H, Janssens R, Vanheule V, Menezes GB, Macari S, Silva TA, Amaral FA, Proost P. The chemokine fragment CXCL9(74-103) diminishes neutrophil recruitment and joint inflammation in antigen-induced arthritis. J Leukoc Biol 2018; 104:413-422. [DOI: 10.1002/jlb.3ma1217-502r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/01/2018] [Accepted: 04/05/2018] [Indexed: 12/28/2022] Open
Affiliation(s)
- Daiane Boff
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute; KU Leuven; Leuven Belgium
- Departamento de Bioquimica e Imunologia; Instituto de Ciencias Biologicas; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Helena Crijns
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute; KU Leuven; Leuven Belgium
| | - Rik Janssens
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute; KU Leuven; Leuven Belgium
| | - Vincent Vanheule
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute; KU Leuven; Leuven Belgium
| | - Gustavo B. Menezes
- Centro de Biologia Gastrointestinal; Departamento de Morfologia; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Soraia Macari
- Departmento de Clínica; Patologia e Cirurgias Odontológicas; Faculdade de Odontologia; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Tarcilia A. Silva
- Departmento de Clínica; Patologia e Cirurgias Odontológicas; Faculdade de Odontologia; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Flavio A. Amaral
- Departamento de Bioquimica e Imunologia; Instituto de Ciencias Biologicas; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Paul Proost
- Laboratory of Molecular Immunology; Department of Microbiology and Immunology; Rega Institute; KU Leuven; Leuven Belgium
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14
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Montalvany-Antonucci CC, Zicker MC, Oliveira MC, Macari S, Madeira MFM, Andrade I, Ferreira AVM, Silva TA. Diet versus jaw bones: Lessons from experimental models and potential clinical implications. Nutrition 2017; 45:59-67. [PMID: 29129238 DOI: 10.1016/j.nut.2017.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 06/30/2017] [Accepted: 07/03/2017] [Indexed: 12/25/2022]
Abstract
The consumption of different types of diets influences not only body health but the bone remodeling process as well. Nutritional components can directly affect maxillary and mandibular alveolar bone microarchitecture. In this review, we focus on the current knowledge regarding the influence of diets and dietary supplementation on alveolar bone. Accumulating evidence from experimental models suggests that carbohydrate- and fat-rich diets are detrimental for alveolar bone, whereas protective effects are associated with consumption of calcium, ω-3, and bioactive compounds. Little is known about the effects of protein-free and protein-rich diets, boron, vitamin C, vitamin E, zinc, and caffeine on alveolar bone remodeling. Adipokines and direct effects of nutritional components on bone cells are proposed mechanisms linking diet and bone. Results from animal models substantiate the role of nutritional components on alveolar bone. It is a well-built starting point for clinical studies on nutritional monitoring and intervention for patients with alveolar bone disorders, especially those who are treatment refractory.
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Affiliation(s)
| | - Marina C Zicker
- Department of Food Science, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marina C Oliveira
- Department of Food Science, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Soraia Macari
- Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Mila Fernandes M Madeira
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ildeu Andrade
- Department of Orthodontics, Faculty of Dentistry, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Adaliene Versiani M Ferreira
- Department of Nutrition, Nursing School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tarcilia A Silva
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Federal University of Minas Gerais, Minas Gerais, Brazil.
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15
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Boriollo MFG, Silva TA, Rodrigues-Netto MF, Silva JJ, Marques MB, Dias CTS, Höfling JF, Resck MCC, Oliveira NMS. Reduction of doxorubicin-induced genotoxicity by Handroanthus impetiginosus in mouse bone marrow revealed by micronucleus assay. BRAZ J BIOL 2017; 78:1-12. [PMID: 28699970 DOI: 10.1590/1519-6984.18515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 09/20/2016] [Indexed: 11/22/2022] Open
Abstract
Handroanthus impetiginosus has long been used in traditional medicine and various studies have determined the presence of bioactive chemical compounds and potential phytotherapeutics. In this study, the genotoxicity of the lyophilized tincture of H. impetiginosus bark (THI) was evaluated in mouse bone marrow using micronucleus assays. The interaction between THI and genotoxic effects induced by the chemotherapeutic agent, doxorubicin (DXR), was also analyzed. Experimental groups were evaluated 24 to 48 h after treatment with N-nitroso-N-ethylurea (NEU; 50 mg/kg), DXR (5 mg/kg), sodium chloride (NaCl; 150 mM), and THI (0.5-2 g/kg). Antigenotoxic assays were carried out using THI (0.5 g/kg) in combination with NEU or DXR. Analysis of the micronucleated polychromatic erythrocytes (MNPCEs) indicated no significant differences between treatment doses of THI (0.5-2 g/kg) and NaCl. Polychromatic erythrocyte (PCE) to normochromatic erythrocyte (NCE) ratios did not indicate any statistical differences between DXR and THI or NaCl, but there were differences between THI and NaCl. A significant reduction in MNPCEs and PCE/NCE ratios was observed when THI was administered in combination with DXR. This study suggested the absence of THI genotoxicity that was dose-, time-, and gender-independent and the presence of moderate systemic toxicity that was dose-independent, but time- and gender-dependent. The combination of THI and DXR also suggested antigenotoxic effects, indicating that THI reduced genotoxic effects induced by chemotherapeutic agents.
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Affiliation(s)
- M F G Boriollo
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - T A Silva
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - M F Rodrigues-Netto
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - J J Silva
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - M B Marques
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - C T S Dias
- Escola de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, Brazil
| | - J F Höfling
- Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - M C C Resck
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - N M S Oliveira
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
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16
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Corrêa JD, Branco LGA, Calderaro DC, Mendonça SMS, Travassos DV, Ferreira GA, Teixeira AL, Abreu LG, Silva TA. Impact of systemic lupus erythematosus on oral health-related quality of life. Lupus 2017; 27:283-289. [PMID: 28679308 DOI: 10.1177/0961203317719147] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Oral symptoms in systemic lupus erythematosus (SLE) patients are often unexplored and affect the health-related quality of life. The aims of this study were: (a) to evaluate the oral health condition of SLE patients compared to control subjects without rheumatic diseases; (b) to determine the consequences of oral health condition in the quality of life of these two groups. Individuals with SLE ( n = 75) and without SLE ( n = 78) (control group), paired for gender and age, underwent complete oral examination. Sociodemographic and clinical information was obtained, and interviews were conducted using the Brazilian version of the oral health impact profile. The activity and damage of SLE disease were assessed, respectively, by the systemic lupus erythematosus disease activity index 2000 and the Systemic Lupus International Collaborating Clinics/American College of Rheumatology damage index for systemic lupus erythematosus. When we analysed the oral health condition and hygiene habits of the participants, SLE patients exhibited an increased number of missing teeth despite their higher frequency of tooth brushing. No significant differences were verified in other habits and clinical parameters evaluated such as smoking, flossing, salivary flux, periodontitis, decayed and filled teeth. Patients with SLE presented with worse oral health-related quality of life than controls ( P = 0.011). The significant difference was on individuals' physical disability ( P = 0.002). The determinant of the negative impact on the oral health-related quality of life was prosthesis wearing ( P < 0.05). Overall, the oral health impact profile score was higher in individuals with moderate SLE damage compared to SLE individuals with no damage ( P = 0.043). Patients with SLE had a negative impact of oral condition on their quality of life. The evaluation of the oral health-related quality of life might be useful to monitor the effects of SLE on oral condition.
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Affiliation(s)
- J D Corrêa
- 1 Department of Oral Pathology and Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - L G A Branco
- 1 Department of Oral Pathology and Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - D C Calderaro
- 2 Department of Locomotor System, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - S M S Mendonça
- 1 Department of Oral Pathology and Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - D V Travassos
- 3 Department of Community and Preventive Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Belo Horizonte, Brazil
| | - G A Ferreira
- 2 Department of Locomotor System, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - A L Teixeira
- 4 Department of Internal Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - L G Abreu
- 5 Department of Pediatric Dentistry and Orthodontics, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - T A Silva
- 1 Department of Oral Pathology and Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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17
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Bastos JV, Silva TA, Colosimo EA, Côrtes MIS, Ferreira DAB, Goulart EMA, Gomez RS, Dutra WO. Expression of Inflammatory Cytokines and Chemokines in Replanted Permanent Teeth with External Root Resorption. J Endod 2017; 43:203-209. [DOI: 10.1016/j.joen.2016.10.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 09/20/2016] [Accepted: 10/10/2016] [Indexed: 12/31/2022]
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18
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Abstract
The inflammatory oral diseases are characterized by the persistent migration of polymorphonuclear leukocytes, monocytes, lymphocytes, plasma and mast cells, and osteoblasts and osteoclasts. In the last decade, there has been a great interest in the mediators responsible for the selective recruitment and activation of these cell types at inflammatory sites. Of these mediators, the chemokines have received particular attention in recent years. Chemokine messages are decoded by specific receptors that initiate signal transduction events, leading to a multitude of cellular responses, including chemotaxis and activation of inflammatory and bone cells. However, little is known about their role in the pathogenesis of inflammatory oral diseases. The purpose of this review is to summarize the findings regarding the role of chemokines in periapical and periodontal tissue inflammation, and the integration, into experimental models, of the information about the role of chemokines in human diseases.
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Affiliation(s)
- T A Silva
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP 31.270-901, Belo Horizonte, Minas Gerais, Brazil.
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19
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May PW, Clegg M, Silva TA, Zanin H, Fatibello-Filho O, Celorrio V, Fermin DJ, Welch CC, Hazell G, Fisher L, Nobbs A, Su B. Diamond-coated 'black silicon' as a promising material for high-surface-area electrochemical electrodes and antibacterial surfaces. J Mater Chem B 2016; 4:5737-5746. [PMID: 32263865 DOI: 10.1039/c6tb01774f] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This report describes a method to fabricate high-surface-area boron-doped diamond (BDD) electrodes using so-called 'black silicon' (bSi) as a substrate. This is a synthetic nanostructured material that contains high-aspect-ratio nano-protrusions, such as spikes or needles, on the Si surface produced via plasma etching. We now show that coating a bSi surface composed of 15 μm-high needles conformably with BDD produces a robust electrochemical electrode with high sensitivity and high electroactive area. A clinically relevant demonstration of the efficacy of these electrodes is shown by measuring their sensitivity for detection of dopamine (DA) in the presence of an excess of uric acid (UA). Finally, the nanostructured surface of bSi has recently been found to generate a mechanical bactericidal effect, killing both Gram-negative and Gram-positive bacteria at high rates. We will show that BDD-coated bSi also acts as an effective antibacterial surface, with the added advantage that being diamond-coated it is far more robust and less likely to become damaged than Si.
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Affiliation(s)
- P W May
- School of Chemistry, University of Bristol, Bristol BS8 1TS, UK.
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20
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Madeira MFM, Queiroz-Junior CM, Montero-Melendez T, Werneck SMC, Corrêa JD, Soriani FM, Garlet GP, Souza DG, Teixeira MM, Silva TA, Perretti M. Melanocortin agonism as a viable strategy to control alveolar bone loss induced by oral infection. FASEB J 2016; 30:4033-4041. [PMID: 27535487 DOI: 10.1096/fj.201600790r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/08/2016] [Indexed: 11/11/2022]
Abstract
Alveolar bone loss is a result of an aggressive form of periodontal disease (PD) associated with Aggregatibacter actinomycetemcomitans (Aa) infection. PD is often observed with other systemic inflammatory conditions, including arthritis. Melanocortin peptides activate specific receptors to exert antiarthritic properties, avoiding excessing inflammation and modulating macrophage function. Recent work has indicated that melanocortin can control osteoclast development and function, but whether such protection takes place in infection-induced alveolar bone loss has not been investigated. The purpose of this study was to evaluate the role of melanocortin in Aa-induced PD. Mice were orally infected with Aa and treated with the melanocortin analog DTrp8-γMSH or vehicle daily for 30 d. Then, periodontal tissue was collected and analyzed. Aa-infected mice treated with DTrp8-γMSH presented decreased alveolar bone loss and a lower degree of neutrophil infiltration in the periodontium than vehicle-treated animals; these actions were associated with reduced periodontal levels of TNF-α, IFN-γ, and IL-17A. In vitro experiments with cells differentiated into osteoclasts showed that osteoclast formation and resorptive activity were attenuated after treatment with DTrp8-γMSH. Thus, melanocortin agonism could represent an innovative way to tame overexuberant inflammation and, at the same time, preserve bone physiology, as seen after Aa infection.-Madeira, M. F. M., Queiroz-Junior, C. M., Montero-Melendez, T., Werneck, S. M. C., Corrêa, J. D., Soriani, F. M., Garlet, G. P., Souza, D. G., Teixeira, M. M., Silva, T. A., Perretti, M. Melanocortin agonism as a viable strategy to control alveolar bone loss induced by oral infection.
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Affiliation(s)
- Mila F M Madeira
- Department of Microbiology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; .,Department of Oral Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Celso M Queiroz-Junior
- Department of Morphology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Trinidad Montero-Melendez
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Silvia M C Werneck
- Department of Microbiology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jôice D Corrêa
- Department of Oral Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Frederico M Soriani
- Department of General Biology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gustavo P Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, Universidade de São Paulo, Bauru, São Paulo, Brazil; and
| | - Daniele G Souza
- Department of Microbiology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mauro M Teixeira
- Department of Biochemistry and Immunology, Biologic Science Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tarcilia A Silva
- Department of Oral Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mauro Perretti
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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21
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Costa VV, Amaral FA, Coelho FM, Queiroz-Junior CM, Malagoli BG, Gomes JHS, Lopes F, Silveira KD, Sachs D, Fagundes CT, Tavares LD, Pinho V, Silva TA, Teixeira MM, Braga FC, Souza DG. Lithothamnion muelleri treatment ameliorates inflammatory and hypernociceptive responses in antigen-induced arthritis in mice. PLoS One 2015; 10:e0118356. [PMID: 25793994 PMCID: PMC4368517 DOI: 10.1371/journal.pone.0118356] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 01/14/2015] [Indexed: 12/29/2022] Open
Abstract
Rheumatoid Arthritis (RA) is a chronic disease characterized by persistent inflammation and pain. Alternative therapies to reduce these symptoms are needed. Marine algae are valuable sources of diverse bioactive compounds. Lithothamnion muelleri (Hapalidiaceae) is a marine algae with anti-inflammatory, antitumor, and immunomodulatory properties. Here, we investigated the potential anti-inflammatory and analgesic activities of L. muelleri in a murine model of antigen-induced arthritis (AIA) in mice. Our results demonstrate that treatment with L. muelleri prevented inflammation and hypernociception in arthritic mice. Mechanistically, the crude extract and the polysaccharide-rich fractions of L. muelleri may act impairing the production of the chemokines CXCL1 and CXCL2, and consequently inhibit neutrophil influx to the knee joint by dampening the adhesion step of leukocyte recruitment in the knee microvessels. Altogether our results suggest that treatment with L.muelleri has a potential therapeutic application in arthritis treatment.
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Affiliation(s)
- Vivian V. Costa
- Laboratório de Interação Microrganismo-Hospedeiro, Departamento de Microbiologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Interdisciplinary Research Group in Infectious Diseases, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Flavio A. Amaral
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Fernanda M. Coelho
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Celso M. Queiroz-Junior
- Laboratório de Interação Microrganismo-Hospedeiro, Departamento de Microbiologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Departamento de Clínica, Patologia e Cirurgia Odontológicas, Faculdade de Odontologia, UFMG, Belo Horizonte, MG, Brazil
| | - Bruna G. Malagoli
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, UFMG, Belo Horizonte, MG, Brazil
| | - Jose Hugo S. Gomes
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, UFMG, Belo Horizonte, MG, Brazil
| | - Fernando Lopes
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Departamento de Morfologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Kátia D. Silveira
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Daniela Sachs
- Departamento de Física e Química, Instituto de Ciências Exatas da Universidade Federal de Itajubá (UNIFEI), Itajubá, MG, Brazil
| | - Caio T. Fagundes
- Laboratório de Interação Microrganismo-Hospedeiro, Departamento de Microbiologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Lívia D. Tavares
- Laboratório de Interação Microrganismo-Hospedeiro, Departamento de Microbiologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Vanessa Pinho
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Departamento de Morfologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Tarcilia A. Silva
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Departamento de Clínica, Patologia e Cirurgia Odontológicas, Faculdade de Odontologia, UFMG, Belo Horizonte, MG, Brazil
| | - Mauro M. Teixeira
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
| | - Fernão C. Braga
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, UFMG, Belo Horizonte, MG, Brazil
| | - Danielle G. Souza
- Laboratório de Interação Microrganismo-Hospedeiro, Departamento de Microbiologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
- * E-mail:
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22
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Moura AP, Taddei SRA, Queiroz-Junior CM, Madeira MFM, Rodrigues LFD, Garlet GP, Souza DG, Machado FS, Andrade I, Teixeira MM, Silva TA. The relevance of leukotrienes for bone resorption induced by mechanical loading. Bone 2014; 69:133-8. [PMID: 25270168 DOI: 10.1016/j.bone.2014.09.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/08/2014] [Accepted: 09/20/2014] [Indexed: 12/15/2022]
Abstract
5-Lipoxygenase (5-LO) metabolites are important pro-inflammatory lipid mediators. However, much still remains to be understood about the role of such mediators in bone remodeling. This study aimed to investigate the effect of 5-LO metabolites, LTB4 and CysLTs, in a model of mechanical loading-induced bone remodeling. Strain-induced tooth movement and consequently alveolar bone resorption/apposition was achieved by using a coil spring placed on molar and attached to incisors of C57BL6 (wild-type-WT), 5-LO deficient mice (5-LO(-/-)) and mice treated with 5-LO inhibitor (zileuton-ZN) or with antagonist of CysLTs receptor (montelukast-MT). The amount of bone resorption and the number of osteoclasts were determined morphometrically. The expression of inflammatory and bone remodeling markers in periodontium was analyzed by qPCR. Osteoclast differentiation and TNF-α production were evaluated in vitro using RAW 264.7 cells treated with LTB4 or LTD4. Bone resorption, TRAP(+) cells and expression of Tnfa, Il10 and Runx2 were significantly diminished in 5-LO(-/-), ZN- and MT-treated mice. The expression of Rank was also reduced in 5-LO(-/-) and MT-treated mice. Accordingly, LTB4 and LTD4 in association with RANKL promoted osteoclast differentiation and increased TNF-α release in vitro. These data demonstrate that the absence of 5-LO metabolites, LTB4 and CysLTs reduces osteoclast recruitment and differentiation, consequently diminishing bone resorption induced by mechanical loading. Thus, 5-LO might be a potential target for controlling bone resorption in physiological and pathological conditions.
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Affiliation(s)
- A P Moura
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Department of Oral Pathology and Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - S R A Taddei
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - C M Queiroz-Junior
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Department of Microbiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - M F M Madeira
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Department of Microbiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - L F D Rodrigues
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - G P Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, Universidade de São Paulo, São Paulo, Brazil
| | - D G Souza
- Department of Microbiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - F S Machado
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - I Andrade
- Department of Dentistry, Pontifícia Universidade Católica de Minas Gerais, Minas Gerais, Brazil
| | - M M Teixeira
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - T A Silva
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil.
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23
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Madeira MFM, Queiroz-Junior CM, Cisalpino D, Werneck SMC, Kikuchi H, Fujise O, Ryffel B, Silva TA, Teixeira MM, Souza DG. MyD88 is essential for alveolar bone loss induced by Aggregatibacter actinomycetemcomitans lipopolysaccharide in mice. Mol Oral Microbiol 2013; 28:415-24. [PMID: 23906379 DOI: 10.1111/omi.12034] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2013] [Indexed: 12/20/2022]
Abstract
Aggregatibacter actinomycetemcomitans is a Gram-negative bacteria highly associated with localized aggressive periodontitis. The recognition of microbial factors, such as lipopolysaccharide from A. actinomycetemcomitans ((Aa)LPS), in the oral environment is made mainly by surface receptors known as Toll-like receptors (TLR). TLR4 is the major LPS receptor. This interaction leads to the production of inflammatory cytokines by myeloid differentiation primary-response protein 88 (MyD88) -dependent and -independent pathways, which may involve the adaptor Toll/interleukin-1 receptor-domain-containing adaptor inducing interferon-β (TRIF). The aim of this study was to assess the involvement of MyD88 in alveolar bone loss induced by (Aa)LPS in mice. C57BL6/J wild-type (WT) mice, MyD88, TRIF or TRIF/MyD88 knockout mice received 10 injections of Aa LPS strain FDC Y4 (5 μg in 3 μl), in the palatal gingival tissue of the right first molar, every 48 h. Phosphate-buffered saline was injected in the opposite side and used as control. Animals were sacrificed 24 h after the 10th injection and the maxillae were removed for macroscopic and biochemical analyses. The injections of Aa LPS induced significant alveolar bone loss in WT mice. In the absence of MyD88 or TRIF/MyD88 no bone loss induced by (Aa)LPS was observed. In contrast, responses in TRIF(-/-) mice were similar to those in WT mice. Diminished bone loss in the absence of MyD88 was associated with fewer TRAP-positive cells and increased expression of osteoblast markers, RUNX2 and osteopontin. There was also reduced tumor necrosis factor-α production in MyD88(-/-) mice. There was less osteoclast differentiation of hematopoietic bone marrow cells from MyD88(-/-) mice after (Aa)LPS stimulation. Hence, the signaling through MyD88 is pivotal for (Aa)LPS-induced osteoclast formation and alveolar bone loss.
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Affiliation(s)
- M F M Madeira
- Departamento de Microbiologia, ICB, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil; Departamento de Bioquímica e Imunologia, ICB, UFMG, Belo Horizonte, MG, Brazil
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24
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Santana AR, Amorim FF, Soares FB, de Souza Godoy LG, de Jesus Almeida L, Rodrigues TA, de Andrade Filho GM, Silva TA, da Silva Neto OG, Rocha PHG, Ferreira PN, Amorim APP, Bastos de Moura E, de Araújo Neto JA, de Oliveira Maia M. Comparison of CURB-65 and CRB-65 as predictors of death in community-acquired pneumonia in adults admitted to an ICU. Crit Care 2013. [PMCID: PMC3891493 DOI: 10.1186/cc12655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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25
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Santana AR, Amorim FF, Soares FB, de Souza Godoy LG, de Jesus Almeida L, Rodrigues TA, Menezes de Andrade Filho G, Silva TA, de Souza JL, Ogliari KCM, Ferreira PN, Amorim APP, de Moura EB, de Araújo Neto JA, de Oliveira Maia M. Acute kidney injury according to RIFLE criteria in an ICU: incidence and mortality impact. Crit Care 2013. [PMCID: PMC3890969 DOI: 10.1186/cc12646] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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26
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Santana AR, Amorim FF, Soares FB, de Souza Godoy LG, de Jesus Almeida L, Rodrigues TA, de Andrade Filho GM, Silva TA, de Carvalho Santos LC, de Araújo MPB, Ferreira PN, Amorim APP, de Moura EB, de Araújo Neto JA, de Oliveira Maia M. Role of hypothermia in the immediate postoperative period on mortality in a surgical ICU. Crit Care 2013. [PMCID: PMC3891297 DOI: 10.1186/cc12675] [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: 11/13/2022] Open
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27
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Filho GM, Silva TA, Santana AR, Soares FB, Almeida LJ, Godoy LG, Rodrigues TA, Maia MO, Neto JA, Amorim AP, Moura EB, Amorim FF. Impact of the time elapsed between ICU request and actual admission on mortality and length of stay. Crit Care 2013. [PMCID: PMC3643162 DOI: 10.1186/cc12425] [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: 11/10/2022] Open
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28
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Amorim FF, Moura EB, Santana AR, Soares FB, Godoy LG, Rodrigues TA, Almeida LJ, FIlho GM, Silva TA, Amorim AP, Neto JA, Maia MO. Lactate clearance as a determinant of mortality in surgical patients. Crit Care 2013. [PMCID: PMC3642496 DOI: 10.1186/cc12154] [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: 11/10/2022] Open
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29
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Omena EP, Lavrado HP, Paranhos R, Silva TA. Spatial distribution of intertidal sandy beach polychaeta along an estuarine and morphodynamic gradient in an eutrophic tropical bay. Mar Pollut Bull 2012; 64:1861-1873. [PMID: 22818168 DOI: 10.1016/j.marpolbul.2012.06.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 05/28/2012] [Accepted: 06/02/2012] [Indexed: 06/01/2023]
Abstract
The spatial distribution of polychaeta along pollution gradients often reflects different degrees of disturbance. In order to evaluate polychaeta fauna of an organically polluted tropical bay, 20 sandy beaches distributed in five areas were sampled. The relationship between community structure, slope, beach index, exposure, sediment and water quality parameters were analysed. Multivariate analysis of variance (PERMANOVA) showed differences among areas and beaches. Scolelepis chilensis dominated at mouth of bay beaches whereas Streblospio gynobranchiata and Capitella capitata complex, at inner beaches. Highest polychaete density was recorded at areas 3 and 5 with the dominance of Saccocirrus sp. and the organic indicator species C. capitata complex and Polydora sp. The most important factors obtained from canonical analysis were sorting, slope, mud and organic matter percentage. Marine biotic index (AMBI) showed that areas 3 and 5 were highly affected by anthropogenic factors, given that a poor polychaeta fauna, dominated by opportunistic species, were found. Polychaete assemblages were affected by eutrophication along an estuarine gradient as well as by morphodynamic condition of the beaches.
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Affiliation(s)
- E P Omena
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21941-913 Rio de Janeiro (RJ), Brazil.
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Resende RG, Correia-Silva JDF, Silva TA, Xavier SG, Bittencourt H, Gomez RS, Abreu MHNG. Saliva and blood interferon gamma levels andIFNGgenotypes in acute graft-versus-host disease. Oral Dis 2012; 18:816-22. [DOI: 10.1111/j.1601-0825.2012.01955.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Correia-Silva JF, Resende RG, Arão TC, Abreu MHNG, Teixeira MM, Bittencourt H, Silva TA, Gomez RS. HCMV gB genotype and its association with cytokine levels in hematopoietic stem cell transplantation. Oral Dis 2011; 17:530-7. [PMID: 21332604 DOI: 10.1111/j.1601-0825.2011.01801.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Glycoprotein B (gB) has been implicated in determining the pathogenicity and clinical outcomes of human cytomegalovirus (HCMV) disease. OBJECTIVE The purpose of this study was to assess the prevalence of gB genotypes in allogeneic hematopoietic stem cell transplantation (allo-HSCT) and the relationship between it and cytokine levels in saliva and blood samples. The impact of these parameters on patients' survival was also investigated. METHODS Samples were obtained from 63 patients receiving an allo-HSCT. HCMV gB genotyping was carried out by multiplex nested PCR. The cytokine levels were assessed using ELISA assay. RESULTS A single or mixed genotype infection was detected in the saliva and blood of 36/63 and 52/63 subjects, respectively. Patients with gB2 in their saliva showed lower IL-10 levels in comparison with patients without gB2. Reduced blood levels of IFN-γ and IL-1β were also found in recipients with the HCMV gB4 genotype compared with patients without it. Decreased IL-1β and increased IL-10 blood levels were associated with lower survival. However, HCMV gB genotypes have no impact on patient outcome. CONCLUSION Decreased IL-1β and increased IL-10 levels in the blood are associated with lower survival. HCMV genotypes are associated with different cytokine levels in saliva and blood.
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Affiliation(s)
- J F Correia-Silva
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Abstract
INTRODUCTION To evaluate the microscopic characteristics and densities (per mm(2) ) of tryptase(+) mast cells, CD4(+) T helper lymphocytes, CD45RO(+) memory T lymphocytes, foxp3(+) T regulatory lymphocytes, CD20(+) B lymphocytes, CD68(+) macrophages, and CD31(+) blood vessels in human dental pulpitis (n=38) and healthy pulpal tissue (n=6). METHODOLOGY The pulps of 38 human teeth with a clinical diagnosis of irreversible pulpitis were removed by pulpectomy. The pulp tissue was immersed in 10% buffered formalin for evaluation using light microscopy. Tryptase, CD4, CD45RO, foxp3, CD20, CD68, and CD31 expressions were analysed using immunohistochemistry; other microscopic features, such as intensity of inflammatory infiltrate and collagen deposition, were evaluated using haematoxylin and eosin stain. Wilcoxon and Mann-Whitney tests were used for statistical analysis. The significance level was set at α=5%. RESULTS Two microscopic patterns of pulpitis were found: group 1 (G1) (n=15) had an intense inflammatory infiltrate and mild collagen deposition; conversely, group 2 (G2) (n=23) had a scarce inflammatory infiltrate and intense collagen deposition. The numbers of CD68(+) macrophages (P=0.004) and CD20(+) B (P=0.068) lymphocytes and the density of blood vessels (P=0.002) were higher in G1 than in G2. However, a similar number of CD4(+) and CD45RO(+) T lymphocytes was found in both groups (P>0.05). When present, tryptase(+) mast cells were equally distributed in G1 and G2, whereas foxp3(+) T regulatory lymphocytes were detected in 59% and 14% of the samples of G1 and G2. Controls exhibited lower numbers of foxp3, tryptase, CD4, CD45RO, CD68 and CD20 positive cells than G1 and G2. CONCLUSIONS Irreversible pulpitis had distinct microscopic features with important quantitative and qualitative differences in inflammatory cell infiltration.
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Affiliation(s)
- K F Bruno
- Department of Endodontics, Federal University of Goiás, Goiânia, GO, Brazil
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Vieira AT, Fagundes CT, Alessandri AL, Castor MGM, Guabiraba R, Borges VO, Silveira KD, Vieira ELM, Gonçalves JL, Silva TA, Deruaz M, Proudfoot AEI, Sousa LP, Teixeira MM. Treatment with a novel chemokine-binding protein or eosinophil lineage-ablation protects mice from experimental colitis. Am J Pathol 2009; 175:2382-91. [PMID: 19893035 DOI: 10.2353/ajpath.2009.090093] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Eosinophils are multifunctional leukocytes implicated in numerous inflammatory diseases. The present study was conducted to clarify the precise role of eosinophils in the development of colitis by using eosinophil-depleted mice and a novel chemokine-binding protein that neutralizes CCL11 action. Colitis was induced by administration of dextran sodium sulfate (DSS) to wild-type and eosinophil-deficient DeltadblGATA-1 mice. Accumulation of eosinophils in the gut of mice given DSS paralleled worsening of clinical score and weight loss. In response to DSS, DeltadblGATA-1 mice showed virtual absence of eosinophil recruitment, amelioration of clinical score, weight loss, and tissue destruction, and no lethality. There was a decrease in CXCL1 and CCL3 production and decreased neutrophil influx in the intestine of DeltadblGATA-1 mice. Transfer of bone marrow cells from wild-type mice reconstituted disease manifestation in DSS-treated DeltadblGATA-1 mice, and levels of CCL11 were increased after DSS treatment and localized to inflammatory cells. Treatment with the chemokine-binding protein evasin-4 at a dose that prevented the function of CCL11 greatly ameliorated clinical score, weight loss, overall tissue destruction, and death rates. In conclusion, the influx of eosinophils is critical for the induction of colitis by DSS. Treatment with a novel chemokine-binding protein decreased eosinophil influx and greatly ameliorated colitis, suggesting that strategies that interfere with the recruitment of eosinophils may be useful as therapy for colitis.
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Affiliation(s)
- Angélica T Vieira
- Laboratório de Imunofarmacologia, Colégio Técnico, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
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Andrade I, Taddei SRA, Garlet GP, Garlet TP, Teixeira AL, Silva TA, Teixeira MM. CCR5 down-regulates osteoclast function in orthodontic tooth movement. J Dent Res 2009; 88:1037-41. [PMID: 19828893 DOI: 10.1177/0022034509346230] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
During orthodontic tooth movement, there is local production of chemokines and an influx of leukocytes into the periodontium. CCL5 plays an important role in osteoclast recruitment and activation. This study aimed to investigate whether the CCR5-receptor influences these events and, consequently, orthodontic tooth movement. An orthodontic appliance was placed in wild-type mice (WT) and CCR5-deficient mice (CCR5(-/-)). The expression of mediators involved in bone remodeling was evaluated in periodontal tissues by Real-time PCR. The number of TRAP-positive osteoclasts and the expression of cathepsin K, RANKL, and MMP13 were significantly higher in CCR5(-/-). Meanwhile, the expression of two osteoblastic differentiation markers, RUNX2 and osteocalcin, and that of bone resorption regulators, IL-10 and OPG, were lower in CCR5(-/-). Analysis of the data also showed that CCR5(-/-) exhibited a greater amount of tooth movement after 7 days of mechanical loading. The results suggested that CCR5 might be a down-regulator of alveolar bone resorption during orthodontic movement.
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Affiliation(s)
- I Andrade
- Department of Orthodontics, Faculty of Dentistry, Pontifícia Universidade Católica de Minas Gerais, Av. Dom José Gaspar 500, CEP 31.270-901, Belo Horizonte, Minas Gerais, Brazil.
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Fukada SY, Silva TA, Saconato IF, Garlet GP, Avila-Campos MJ, Silva JS, Cunha FQ. iNOS-derived nitric oxide modulates infection-stimulated bone loss. J Dent Res 2009; 87:1155-9. [PMID: 19029085 DOI: 10.1177/154405910808701207] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nitric oxide (NO) derived from inducible nitric oxide synthase (iNOS) plays an important role in host defense, as well as in inflammation-induced tissue lesions. Here we evaluated the role of NO in bone loss in bacterial infection-induced apical periodontitis by using iNOS-deficient mice (iNOS(-/-)). The iNOS(-/-) mice developed greater inflammatory cell recruitment and osteolytic lesions than WT mice. Moreover, tartrate-resistant acid-phosphatase-positive (TRAP(+)) osteoclasts were significantly more numerous in iNOS(-/-) mice. Furthermore, the increased bone resorption in iNOS(-/-) mice also correlated with the increased expression of receptor activator NF-kappaB (RANK), stromal-cell-derived factor-1 alpha (SDF-1 alpha/CXCL12), and reduced expression of osteoprotegerin (OPG). These results show that NO deficiency was associated with an imbalance of bone-resorption-modulating factors, leading to severe infection-stimulated bone loss.
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Affiliation(s)
- S Y Fukada
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Av. Bandeirantes 3900, Monte Alegre, 14049-900, Ribeirão Preto SP, São Paulo, Brazil
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Guerrero ATG, Verri WA, Cunha TM, Silva TA, Schivo IRS, Dal-Secco D, Canetti C, Rocha FAC, Parada CA, Cunha FQ, Ferreira SH. Involvement of LTB4 in zymosan-induced joint nociception in mice: participation of neutrophils and PGE2. J Leukoc Biol 2007; 83:122-30. [PMID: 17913976 DOI: 10.1189/jlb.0207123] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Leukotriene B4 (LTB4) mediates different inflammatory events such as neutrophil migration and pain. The present study addressed the mechanisms of LTB4-mediated joint inflammation-induced hypernociception. It was observed that zymosan-induced articular hypernociception and neutrophil migration were reduced dose-dependently by the pretreatment with MK886 (1-9 mg/kg; LT synthesis inhibitor) as well as in 5-lypoxygenase-deficient mice (5LO(-/-)) or by the selective antagonist of the LTB(4) receptor (CP105696; 3 mg/kg). Histological analysis showed reduced zymosan-induced articular inflammatory damage in 5LO(-/-) mice. The hypernociceptive role of LTB4 was confirmed further by the demonstration that joint injection of LTB4 induces a dose (8.3, 25, and 75 ng)-dependent articular hypernociception. Furthermore, zymosan induced an increase in joint LTB4 production. Investigating the mechanism underlying LTB4 mediation of zymosan-induced hypernociception, LTB4-induced hypernociception was reduced by indomethacin (5 mg/kg), MK886 (3 mg/kg), celecoxib (10 mg/kg), antineutrophil antibody (100 mug, two doses), and fucoidan (20 mg/kg) treatments as well as in 5LO(-/-) mice. The production of LTB4 induced by zymosan in the joint was reduced by the pretreatment with fucoidan or antineutrophil antibody as well as the production of PGE2 induced by LTB4. Therefore, besides reinforcing the role of endogenous LTB4 as an important mediator of inflamed joint hypernociception, these results also suggested that the mechanism of LTB4-induced articular hypernociception depends on prostanoid and neutrophil recruitment. Furthermore, the results also demonstrated clearly that LTB4-induced hypernociception depends on the additional release of endogenous LTs. Concluding, targeting LTB4 synthesis/action might constitute useful therapeutic approaches to inhibit articular inflammatory hypernociception.
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Affiliation(s)
- Ana T G Guerrero
- Department of Pharmacology, Faculty of Medicine of Ribeirao Preto, University of São Paulo, Avenida Bandeirantes, 3900, 14049-900-Ribeirao Preto, Sao Paulo, Brazil
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Guerrero ATG, Verri WA, Cunha TM, Silva TA, Rocha FAC, Ferreira SH, Cunha FQ, Parada CA. Hypernociception elicited by tibio-tarsal joint flexion in mice: a novel experimental arthritis model for pharmacological screening. Pharmacol Biochem Behav 2006; 84:244-51. [PMID: 16797062 DOI: 10.1016/j.pbb.2006.05.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [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: 01/19/2006] [Revised: 05/05/2006] [Accepted: 05/09/2006] [Indexed: 11/19/2022]
Abstract
Mice have been used as animal model to study mechanisms underlying inflammatory and immune diseases. The present study describes a model of joint inflammation-induced hypernociception to discriminate pharmacological tests in mice. A polypropylene tip probe with a large area (4.15 mm2) applied on the plantar surface of the hind paw was used to produce a dorsal flexion of tibio-tarsal joint. Experiments were performed to demonstrate that the probe application did not provoke cutaneous nociception. The decrease in the withdrawal threshold of inflamed joint was used as nociceptive parameter. Administration of zymosan in the tibio-tarsal joint induced a dose and time-dependent hypernociception elicited by articular dorsal flexion movement. Maximal joint hypernociception was detected between 7 and 24 h after zymosan injection, and matched maximal inflammation score as determined by histopathology and neutrophil migration assay. In agreement with the inflammatory hypernociceptive paradigm, flexion-elicited hypernociception induced by zymosan was dose-dependently inhibited by morphine (2-8 mg/kg) and by an effective dose of indomethacin (5 mg/kg). The present study demonstrated that the tibio-tarsal flexion reflex is a behavioral nociceptive model that allows a quantitative evaluation of inflammatory joint hypernociception in mice and its pharmacological modulation.
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Affiliation(s)
- Ana T G Guerrero
- Department of Pharmacology, Faculty of Medicine of Ribeirao Preto, University of São Paulo, São Paulo, Avenida Bandeirantes, 3900, 14049-900 - Ribeirao Preto, São Paulo, Brazil
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Garlet GP, Cardoso CR, Silva TA, Ferreira BR, Avila-Campos MJ, Cunha FQ, Silva JS. Cytokine pattern determines the progression of experimental periodontal disease induced by Actinobacillus actinomycetemcomitans through the modulation of MMPs, RANKL, and their physiological inhibitors. ACTA ACUST UNITED AC 2006; 21:12-20. [PMID: 16390336 DOI: 10.1111/j.1399-302x.2005.00245.x] [Citation(s) in RCA: 160] [Impact Index Per Article: 8.9] [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: 11/26/2022]
Abstract
OBJECTIVE Inflammatory and immune reactions raised in response to periodontopathogens are thought to trigger periodontal tissue destruction. We therefore investigated the expression of matrix metalloproteinases (MMPs) and the osteoclastogenic factor RANKL (receptor activator of nuclear factor-kappaB ligand), their respective inhibitors TIMPs (tissue inhibitors of metalloproteinases) and OPG (osteoprotegerin) and their possible correlation with the expression of inflammatory and regulatory cytokines in the course of experimental periodontal disease in mice. METHODS We characterized the time course of leukocyte migration and alveolar bone loss in C57BL/6 mice infected with Actinobacillus actinomycetemcomitans. Quantitative polymerase chain reaction (RealTime PCR) and ELISA were performed to determine the expression of MMPs, TIMPs, RANKL, OPG and cathepsin K, interleukin-1beta, tumor necrosis factor-alpha, interferon-gamma, interleukin-12, interleukin-4 and interleukin-10 in periodontal tissue samples harvested throughout the course of experimental disease. RESULTS Oral inoculation of A. actinomycetemcomitans results in an intense and widespread migration of leukocytes to the gingival tissues, besides marked alveolar bone resorption. Our data also demonstrate two distinct patterns of MMP/TIMP and RANKL/OPG expression in the course of experimental periodontal disease. The expression of MMPs (MMP-1, 2 and 9) and RANKL was correlated with the expression of interleukin-1beta, tumor necrosis factor-alpha and interferon-gamma, in a time period characterized by the intense increase of inflammatory reaction and alveolar bone loss. On the other hand, interleukin-4 and interleukin-10 were associated with higher expression of TIMPs (TIMP 1, 2 and 3) and OPG, with a lower expression of MMPs and RANKL, and with reduced rates of increase of cellular infiltration in periodontal tissues and alveolar bone loss. CONCLUSIONS It is possible that the pattern of cytokines produced in periodontal tissues determines the progression and the severity of experimental periodontal disease, controlling the breakdown of soft and bone tissues through the balance between MMPs/TIMP and RANKL/OPG expression in gingival tissues.
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Affiliation(s)
- G P Garlet
- Department of Biochemistry and Immunology, School of Medicine-USP, Ribeirao Preto, SP, Brazil.
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Silva TA, Garlet GP, Lara VS, Martins W, Silva JS, Cunha FQ. Differential expression of chemokines and chemokine receptors in inflammatory periapical diseases. ACTA ACUST UNITED AC 2005; 20:310-6. [PMID: 16101967 DOI: 10.1111/j.1399-302x.2005.00232.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [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: 11/26/2022]
Abstract
BACKGROUND Periapical lesions are thought to be the result of a local inflammatory response mediated by inflammatory cell infiltration and production of inflammatory mediators. Although chemokines are strongly implicated in the migration and activation of leukocytes in different inflammatory diseases and experimental models, little is known regarding the expression of chemokines and their receptors in human apical periodontitis. OBJECTIVE AND METHODS The objective of this study was to determine the expression of chemokines and their receptors by real-time polymerase chain reaction in samples obtained from healthy gingiva, periapical granulomas, and inflammatory periradicular cysts. The inflammatory infiltrate was characterized by immunohistochemistry. RESULTS Comparing cysts and granulomas, an increase in CD4+ and CD8+ cells was observed in granulomas, despite the similar numbers of CD45RO-positive cells detected in both lesions. The analysis of mRNA expression revealed increased levels of CCR1, CCR2, CCR3, CCR5, CXCR1, and CXCR3 in both types of lesion compared with controls. Cysts exhibited a higher expression of CCR3, CCR5, CXCR1, and CXCR3 compared to granulomas. A significantly higher expression of RANTES, IP-10, and MCP-1 was detected in cysts compared with controls or granulomas. The expression of interleukin-8, MIP-1alpha, and MIP-1beta was not different in the three experimental groups. CONCLUSIONS The increase in Th1 type (CCR1, CCR5, and CXCR3) and Th2 type (CCR2 and CCR3) receptors in both periapical lesions suggests the concomitant occurrence of Th1 and Th2 responses. Furthermore, the prevalent expression of the receptors CCR3, CCR5, CXCR1, and CXCR3 and of the chemokines RANTES, IP-10, and MCP-1 in cysts may point to a role in the progression of granulomas to cysts.
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Affiliation(s)
- T A Silva
- Department of Pharmacology, School of Medicine of Ribeirao Preto, Brazil.
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Silva TA, Lara VS, Silva JS, Oliveira SHP, Butler WT, Cunha FQ. Macrophages and mast cells control the neutrophil migration induced by dentin proteins. J Dent Res 2005; 84:79-83. [PMID: 15615881 DOI: 10.1177/154405910508400114] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/17/2022] Open
Abstract
Dentin sialoprotein (DSP) and dentin phosphoprotein (DPP), the major dentin proteins, have been shown to induce neutrophil migration through release of IL-1beta, TNF-alpha, MIP-2, and KC. However, the sources of these mediators were not determined. Here, the roles of macrophages and mast cells (MC) in dentin-induced neutrophil accumulation were investigated. Peritoneal MC depletion or the enhancement of macrophage population increased DSP- and DPP-induced neutrophil extravasation. Moreover, supernatants from DSP- and DPP-stimulated macrophages caused neutrophil migration. The release of neutrophil chemotactic factor by macrophages was inhibited by dexamethasone or the supernatant of DSP-treated MC. Consistently, dexamethasone and the MC supernatant inhibited the production of IL-1beta, TNF-alpha, and MIP-2 by macrophages. This inhibitory activity of the DSP-stimulated MC was neutralized by anti-IL-4 and anti-IL-10 antibodies. These results indicate that dentin induces the release of the neutrophil chemotactic substance(s) by macrophages, which are down-modulated by MC-derived IL-4 and IL-10.
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Affiliation(s)
- T A Silva
- Department of Stomatology, Faculty of Dentistry of Bauru, University of São Paulo, Brazil.
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Abstract
The study was conducted in the Capibaribe river estuary in Recife (Brazil) to assess the role played by cladocerans in a eutrophic environment. Samplings were carried out monthly at 4 fixed stations along the estuary from July 1987 to June 1988. Collections were made with a plankton net of 65 micrometers mesh size. Six cladocerans species were registered: Penilia avirostris, Diaphanosoma spinulosum, Chydorus barroisi, Ceriodaphnia rigaudi, Ilyocryptus spinifer, and Moina micrura. The most frequent species was Moina micrura with 49%. The only true marine species was Penilia avirostris, which was registered at station 1 (close to the river mouth), during high and low tide and in the dry season. The Cladocera average density decreased from 329 ind.m-3 (August 1987, high tide) to 2 ind.m-3 (March 1988, high tide) due to the high load of organic and chemical pollution received by the estuary. At all stations, D. spinulosum, M. micrura, and C. barroisi occurred with a wide distribution, mainly during the rainy season. C. rigaudi and I. spinifer were rare, occurring only during the rainy season. Cladocerans played an important role in the food webs of the plankton community of the Capibaribe tropical estuary and the dominance of a few small species indicated a hypereutrophic environment. A high level of disturbance was indicated by the decline in diversity of specialized species and the increase in abundance of opportunistic species like M. micrura.
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Affiliation(s)
- M N Paranaguá
- Departamento de Biologia da Universidade Federal Rural de Pernambuco, Av. Dom Manuel, s/n, Dois lrmAos, CEP 52171-900, Recife, Pemambuco, Brazil
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Abstract
OBJECTIVE The aim of this study was to characterize the effects of dentin extracts on cytokine, chemokine and nitric oxide (NO) production by primary rat bone cells. STUDY DESIGN Osteoblastic bone marrow cultures were exposed to particulate (D-part), non-particulate (D-n-part) and demineralized dentin extracts and evaluated for proliferative activity, cell morphology, alkaline phosphatase activity and bone-like nodule formation. Cytokine production was assessed by enzyme-linked immunosorbent assay and NO release by the Griess method. RESULTS The dentin extracts did not affect osteoblast numbering. Conversely, they up regulated in a dose-dependent manner the production by the osteoblasts of the pro-inflammatory interleukin-1beta (IL-1beta), tumor necrosis factor-alpha, IL-6, cytokine-induced neutrophil chemoattractant-1, and of the anti-inflammatory cytokine, IL-10. The NO production was stimulated only by D-n-part. CONCLUSION These results demonstrate that dentin induces the production of inflammatory cytokines by osteoblasts and suggest that pro-resorptive pathways might be stimulated when dentin molecules come into contact with bone cells during pathological processes associated with dentin and bone matrix dissolution.
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Affiliation(s)
- T A Silva
- Department of Stomatology, Pathology, Faculty of Dentistry of Bauru, University of São Paulo, Brazil.
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Silva TA, Lara VS, Silva JS, Garlet GP, Butler WT, Cunha FQ. Dentin sialoprotein and phosphoprotein induce neutrophil recruitment: a mechanism dependent on IL-1beta, TNF-beta, and CXC chemokines. Calcif Tissue Int 2004; 74:532-41. [PMID: 15354861 DOI: 10.1007/s00223-003-0159-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [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] [Indexed: 11/24/2022]
Abstract
Dentin is a reservoir of several potentially active molecules, and dentin sialoprotein (DSP) and dentin phosphoprotein (DPP) are the two major non-collagenous proteins. It has been established that dentin molecules are released as a consequence of osteoclast action during the resorption process. Along with osteoclasts, inflammatory cells seem to play an important role at sites of root resorption. Although the role of dentin molecules in dentinogenesis is well known, their role in pathological processes associated with dentin matrix dissolution is unclear. Recent studies have suggested that dentin components may function as chemotactic and activator signals for inflammatory cells at these sites. Herein we present evidence that demineralized dentin crude extract, DSP, and DPP induced doseand time-dependent neutrophil migration into the peritoneal cavity of mice and that this activity was inhibited by dexamethasone, but not by indomethacin or MK886. The blockade of tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 (IL-1) receptors inhibited neutrophil accumulation. The neutrophil migration was also diminished in the absence of the chemokines cytokine-induced neutrophil chemoattractant (KC) and macrophage inflammatory protein-2 (MIP-2), but not in the absence of macrophage inflammatory protein-1alpha (MIP-1alpha). These results demonstrate that dentin induces neutrophil migration via the synthesis of IL-1beta, TNF-alpha, and chemokines and they suggest that dentin matrix proteins may have an active role in inflammatory cell recruitment during pathological processes associated with dentin and bone matrix dissolution.
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Affiliation(s)
- T A Silva
- Department of Stomatology, Faculty of Dentistry of Bauru, University of São Paulo, São Paulo, Brazil.
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Silva TA, Rosa AL, Lara VS. Dentin matrix proteins and soluble factors: intrinsic regulatory signals for healing and resorption of dental and periodontal tissues? Oral Dis 2004; 10:63-74. [PMID: 14996275 DOI: 10.1111/j.1601-0825.2004.00992.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [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: 01/08/2023]
Abstract
Dentin contains numerous polypeptides and signaling molecules sequestered in a mineralized matrix. The exposure and release of these molecules occur as a consequence of injury to the pulp and periodontal ligament, which may result from luxation, orthodontic movement or infections of tooth and periodontal structures. When released at these sites, dentin constituents have the potential to act on different surrounding cells, including periodontal cells, osteoblasts, osteoclasts and inflammatory cells, and to affect the course of dental disease. Experimental studies have highlighted the interactions between dentin and cells from tooth and periodontal tissues and reveal dentin to be a cell adhesive, signaling and migratory stimulus for various mesenchymal and inflammatory cells. These results support the hypothesis that dentin molecules might function as regulatory signals for the healing and resorption of dental and periodontal tissues. Data from recent and classical investigations are summarized, many open questions are discussed, and current hypotheses concerning the mechanisms of tooth resorption and periodontal healing are outlined. Many questions regarding the importance of dentin as a source of multifunctional molecules remain unanswered and provide important directions for future studies.
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Affiliation(s)
- T A Silva
- Department of Stomatology, Faculty of Dentistry of Bauru, University of São Paulo, São Paulo, Brazil.
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Abstract
UNLABELLED The expression of the inducible nitric oxide synthase enzyme (iNOS) is a response to an inflammatory stimulus and produces a large amount of nitric oxide (NO), which may act as a cytotoxic molecule against the invading microorganism and may be related to both harmful and beneficial effects to tissues. OBJECTIVE AND MATERIAL AND METHODS In order to further characterize the presence of NO in human periodontal disease, we undertook a quantitative study of iNOS positive cells in samples of clinically healthy gingival tissues, plaque-induced gingivitis and localized chronic periodontitis using immunohistochemistry. RESULTS A significant increase in the number of iNOS+ cells mm-2 was found in the samples of the gingivitis and periodontitis compared with those of the control. In all groups most of the polymorphonuclear cells showed intense immunoreactivity for iNOS independent of the disease stage, and the percentage of iNOS+ polymorphonuclear cells increased significantly in periodontal disease when compared with the control. CONCLUSION Our results indicate that iNOS increases in the presence of periodontal disease. In addition, our findings suggest that polymorphonuclear cells present an additional activation pathway in periodontal disease, expressing significant iNOS and probably representing an important source of NO in human periodontal disease that has not been previously reported.
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Affiliation(s)
- A C Batista
- Department of Stomatology (Pathology), Bauru Dental School, University of São Paulo, Brazil
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Silva TA, Yano K. [Aspects of nursing care in total arthroplasty of the hip]. Rev Enferm Nov Dimens 1976; 2:75-9. [PMID: 59374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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