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Braga-Neto JT, Tozetto SO, Oliveira FS, Conceição TA, Santos WPC, Fernandes MS, Baliza MD. Comet assay to evaluate chromosomal changes in chickens (Gallus gallus domesticus) contaminated by lead in a city in Bahia. BRAZ J BIOL 2023; 83:e274806. [PMID: 38126633 DOI: 10.1590/1519-6984.274806] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023] Open
Abstract
Chicken (Gallus gallus domesticus) is one of the primary sources of animal protein for the Brazilian population. Thus, the safety of this food is highly relevant. This study was based on the evidence of severe contamination of these animals by metals such as lead in Santo Amaro, Bahia. This exploratory study aimed to evaluate associations between lead levels in blood of chicken exposed to a contaminated area with the occurrence of chromosomal alterations, evidencing genotoxic effects. Serum lead analysis was performed by GF-AAS after dilution with a matrix modifier solution (Triton X-100 0.2% v/v and HNO3 0.1% v/v), while chromosomal damage was evaluated using the comet assay. The results showed genotoxic effects (positive comet assay) only for the specimen sample with higher serum lead concentrations (33.9 µg dL-1), suggesting the occurrence of toxic effects at this level of exposure. This work evaluated a relationship between the reduction of serum lead levels in chicken and increased distance from the primary polluting source - a lead processing plant (COBRAC). It also showed that lead is bioavailable in this territory, contaminating chicken and causing genotoxic effects in these animals, further expanding the concern with the local biota and the health of the residents of Santo Amaro.
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Affiliation(s)
- J T Braga-Neto
- Universidade Federal do Recôncavo da Bahia - UFRB, Centro de Ciências da Saúde, Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - S O Tozetto
- Universidade Federal do Recôncavo da Bahia - UFRB, Centro de Ciências da Saúde, Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - F S Oliveira
- Universidade Federal do Recôncavo da Bahia - UFRB, Centro de Ciências da Saúde, Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - T A Conceição
- Universidade Federal do Recôncavo da Bahia - UFRB, Centro de Ciências da Saúde, Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - W P C Santos
- Instituto Federal de Educação, Ciência e Tecnologia da Bahia - IFBA, Salvador, BA, Brasil
| | - M S Fernandes
- Universidade Federal da Fronteira Sul - UFFS, Campus Passo Fundo, Passo Fundo, RS, Brasil
| | - M D Baliza
- Universidade Federal do Recôncavo da Bahia - UFRB, Centro de Ciências da Saúde, Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
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2
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Silva RM, Silva IMM, Jesus MC, Fernandes MDB, Oliveira FS, Evêncio-Neto J. Co-relationship between Escherichia coli in broiler cellulitis and liver lesions. BRAZ J BIOL 2021; 81:714-718. [PMID: 32965333 DOI: 10.1590/1519-6984.230243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 03/18/2020] [Indexed: 12/17/2022] Open
Abstract
Pathogenic strains of Escherichia coli may invade the subcutaneous tissue of poultry and cause cellulitis, whilst the pathogen may also cause lesions in internal organs such as the liver. Current paper co-relates Escherichia coli and virulence genes characteristic of Avian Pathogenic Escherichia coli (APEC) in broilers´ cellulitis and liver lesions. One hundred carcasses were retrieved from the production chain in an avian abattoir in the state of Bahia, Brazil, between August 2013 and January 2014, due to detection of cellulitis lesions. Cellulitis and liver samples were retrieved aseptically to quantify E. coli by Petrifilm™ count fast method (3M Company) (AOAC 998.8). Virulent genes iss and iutA were removed from E. coli isolates by Polymerase Chain Reaction (PCR). Escherichia coli was isolated from 82.0% of broilers removed from the production chain and the bacterium was concomitantly detected in cellulitis and liver lesions in 40.0% of broilers. E. coli counts ranged between 1.00 and 4.73 log CFU/g in liver lesions and between 2.00 and 9.00 log UFC/g in cellulitis lesions. Virulent genes iutA and iss were detected in 97.56% and 89.02% of E. coli isolates, respectively. Genotype analysis demonstrated the concomitant amplification of genes iutA and iss in 60.0% (n=40) of samples of cellulitis and liver lesions in which the simultaneous isolation of E. coli occurred. There was a positive and significant co-relationship (r=0.22; p<0.05) between the variables occurrence of E. coli isolated from liver samples and the occurrence of E. coli isolated from cellulitis lesions. There were also positive and significant co-relationships between populations of E. coli from liver isolates and cellulitis lesions (r=0.46; p<0.05) when E. coli isolated in the liver and in cellulitis lesions was detected. Since results showed a relationship between E. coli in cellulitis and liver lesions and possible systemic infection, the occurrence of cellulitis lesions as a criterion for total discarding of carcass may be suggested.
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Affiliation(s)
- R M Silva
- Universidade Federal do Recôncavo da Bahia - UFRB, Complexo Multidisciplinar de Estudo e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - I M M Silva
- Universidade Federal do Recôncavo da Bahia - UFRB, Complexo Multidisciplinar de Estudo e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - M C Jesus
- Centro de Ciências Agrárias Ambientais e Biológicas - UFRB, Programa de Pós-graduação em Microbiologia Agrícola, Cruz das Almas, BA, Brasil
| | - M D B Fernandes
- Universidade Federal do Recôncavo da Bahia - UFRB, Complexo Multidisciplinar de Estudo e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - F S Oliveira
- Universidade Federal do Recôncavo da Bahia - UFRB, Complexo Multidisciplinar de Estudo e Pesquisa em Saúde, Santo Antônio de Jesus, BA, Brasil
| | - J Evêncio-Neto
- Universidade Federal Rural de Pernambuco, Departamento de Histopatologia, Recife, PE, Brasil
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Sá FVS, Oliveira FS, Torres SB, Paiva EP, Nogueira NW, Sarmento ECS, Melo AS. Hydric and saline stress on Phaseolus lunatus L. seeds. BRAZ J BIOL 2021; 82:e233550. [PMID: 34133547 DOI: 10.1590/1519-6984.233550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 11/17/2020] [Indexed: 11/21/2022] Open
Affiliation(s)
- F V S Sá
- Universidade Federal do Semi-Árido - UFERSA, Centro de Ciências Agrárias, Mossoró, RN, Brasil
| | - F S Oliveira
- Universidade Federal do Semi-Árido - UFERSA, Centro de Ciências Agrárias, Mossoró, RN, Brasil
| | - S B Torres
- Universidade Federal do Semi-Árido - UFERSA, Centro de Ciências Agrárias, Mossoró, RN, Brasil
| | - E P Paiva
- Universidade Federal do Semi-Árido - UFERSA, Centro de Ciências Agrárias, Mossoró, RN, Brasil
| | - N W Nogueira
- Universidade Federal do Semi-Árido - UFERSA, Centro de Ciências Agrárias, Mossoró, RN, Brasil
| | - E C S Sarmento
- Universidade Federal do Ceará - UFC, Departamento de Fitotecnia, Fortaleza, CE, Brasil
| | - A S Melo
- Universidade Estadual da Paraíba - UEPB, Departamento de Ciências Biológicas, Campina Grande, PB, Brasil
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Oliveira FS, Cipriano RB, da Silva FT, Romão EC, Dos Santos CAM. Simple analytical method for determining electrical resistivity and sheet resistance using the van der Pauw procedure. Sci Rep 2020; 10:16379. [PMID: 33009433 PMCID: PMC7532437 DOI: 10.1038/s41598-020-72097-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 08/24/2020] [Indexed: 11/11/2022] Open
Abstract
This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The method is compared with previous numerical solutions and available experimental data showing a universal behavior for isotropic conductors. An approximated solution is also reported allowing one to easily determine ρ and RS for samples either with regular or arbitrary shapes.
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Affiliation(s)
- F S Oliveira
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - R B Cipriano
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - F T da Silva
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - E C Romão
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - C A M Dos Santos
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil.
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Bruno DCF, Donatti A, Martin M, Almeida VS, Geraldis JC, Oliveira FS, Dogini DB, Lopes-Cendes I. Circulating nucleic acids in the plasma and serum as potential biomarkers in neurological disorders. ACTA ACUST UNITED AC 2020; 53:e9881. [PMID: 32813850 PMCID: PMC7446710 DOI: 10.1590/1414-431x20209881] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 06/12/2020] [Indexed: 12/12/2022]
Abstract
Neurological diseases are responsible for approximately 6.8 million deaths every year. They affect up to 1 billion people worldwide and cause significant disability and reduced quality of life. In most neurological disorders, the diagnosis can be challenging; it frequently requires long-term investigation. Thus, the discovery of better diagnostic methods to help in the accurate and fast diagnosis of neurological disorders is crucial. Circulating nucleic acids (CNAs) are defined as any type of DNA or RNA that is present in body biofluids. They can be found within extracellular vesicles or as cell-free DNA and RNA. Currently, CNAs are being explored as potential biomarkers for diseases because they can be obtained using non-invasive methods and may reflect unique characteristics of the biological processes involved in several diseases. CNAs can be especially useful as biomarkers for conditions that involve organs or structures that are difficult to assess, such as the central nervous system. This review presents a critical assessment of the most current literature about the use of plasma and serum CNAs as biomarkers for several aspects of neurological disorders: defining a diagnosis, establishing a prognosis, and monitoring the disease progression and response to therapy. We explored the biological origin, types, and general mechanisms involved in the generation of CNAs in physiological and pathological processes, with specific attention to neurological disorders. In addition, we present some of the future applications of CNAs as non-invasive biomarkers for these diseases.
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Affiliation(s)
- D C F Bruno
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - A Donatti
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - M Martin
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - V S Almeida
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - J C Geraldis
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - F S Oliveira
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - D B Dogini
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - I Lopes-Cendes
- Departamento de Genética Médica e Medicina Genômica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
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Batista-Silva W, Medeiros DB, Rodrigues-Salvador A, Daloso DM, Omena-Garcia RP, Oliveira FS, Pino LE, Peres LEP, Nunes-Nesi A, Fernie AR, Zsögön A, Araújo WL. Modulation of auxin signalling through DIAGETROPICA and ENTIRE differentially affects tomato plant growth via changes in photosynthetic and mitochondrial metabolism. Plant Cell Environ 2019; 42:448-465. [PMID: 30066402 DOI: 10.1111/pce.13413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 01/29/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
Auxin modulates a range of plant developmental processes including embryogenesis, organogenesis, and shoot and root development. Recent studies have shown that plant hormones also strongly influence metabolic networks, which results in altered growth phenotypes. Modulating auxin signalling pathways may therefore provide an opportunity to alter crop performance. Here, we performed a detailed physiological and metabolic characterization of tomato (Solanum lycopersicum) mutants with either increased (entire) or reduced (diageotropica-dgt) auxin signalling to investigate the consequences of altered auxin signalling on photosynthesis, water use, and primary metabolism. We show that reduced auxin sensitivity in dgt led to anatomical and physiological modifications, including altered stomatal distribution along the leaf blade and reduced stomatal conductance, resulting in clear reductions in both photosynthesis and water loss in detached leaves. By contrast, plants with higher auxin sensitivity (entire) increased the photosynthetic capacity, as deduced by higher Vcmax and Jmax coupled with reduced stomatal limitation. Remarkably, our results demonstrate that auxin-sensitive mutants (dgt) are characterized by impairments in the usage of starch that led to lower growth, most likely associated with decreased respiration. Collectively, our findings suggest that mutations in different components of the auxin signalling pathway specifically modulate photosynthetic and respiratory processes.
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Affiliation(s)
- Willian Batista-Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - David B Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Acácio Rodrigues-Salvador
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Rebeca P Omena-Garcia
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Franciele Santos Oliveira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Lilian Ellen Pino
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Lázaro Eustáquio Pereira Peres
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Agustín Zsögön
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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Freitas TS, Oliveira FS, Cruz RP, Pereira RLS, Silva ARP, Moura JVB, Luz-Lima C, Viana BC, da Silva JH, Freire PTC, Coutinho HDM. Modulation of antibiotic effect by Fe 2(MoO 4) 3 microstrutures. Eur J Pharm Sci 2018; 123:295-300. [PMID: 30026093 DOI: 10.1016/j.ejps.2018.07.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/25/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
Abstract
In this study, we report the antibacterial activity and modulation of antibiotic activity by Fe2(MoO4)3 microstructures obtained by the hydrothermal route without use of surfactants or organic additives. This material was characterized by X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM) images. The XRD pattern showed that the Fe2(MoO4)3 crystallize in a monoclinic structure without secondary phases. Raman spectroscopy confirms the formation of Fe2(MoO4)3. SEM images show that the Fe2(MoO4)3 obtained have ball-of-yarn shaped morphology. In the antibacterial assays, strains of Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus were assayed by microdilution method to evaluate the antibacterial and modulatory-antibiotic activity with antibiotics as gentamicin, norfloxacin and imipenem. Against all bacteria, the Minimum Inhibitory Concentration (MIC) was Fe2(MoO4)3 ≥ 1024 μg/mL. This high MIC result must be associated with the fact of the iron be an essential microelement to the bacterial growth. However, when the Fe2(MoO4)3 was assayed in association with the antibiotics was observed an antagonistic effect demonstrated by an enhance of the MIC. This fact is associated directly with the pro-oxidative properties of metallic oxides. These compounds enhance the production of free radicals, as H2O2 and superoxide ions that can affect the cell structures as cell membrane and cell wall. Other effect is associated with the possible coordination of the metal, performing bonds with the chemical structure of the antibiotics, reducing their activity. Our results indicated that nanocompounds as Fe2(MoO4)3 can not be used as antimicrobial products for clinical usage, neither directly and neither in association with antibiotics.
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Affiliation(s)
- T S Freitas
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil
| | - F S Oliveira
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil
| | - R P Cruz
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil
| | - R L S Pereira
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil
| | - A R P Silva
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil
| | - J V B Moura
- Departamento de Física, Universidade Federal do Ceará, P. O. Box 6030, CEP 60455-970 Fortaleza, CE, Brazil; Universidade Federal do Cariri, CEP 63000-000 Juazeiro do Norte, CE, Brazil
| | - C Luz-Lima
- Departamento de Física, Campus Ministro Petrônio Portella, Universidade Federal do Piauí, CEP 64049-550 Teresina, PI, Brazil
| | - B C Viana
- Departamento de Física, Campus Ministro Petrônio Portella, Universidade Federal do Piauí, CEP 64049-550 Teresina, PI, Brazil
| | - J H da Silva
- Universidade Federal do Cariri, CEP 63000-000 Juazeiro do Norte, CE, Brazil
| | - P T C Freire
- Departamento de Física, Universidade Federal do Ceará, P. O. Box 6030, CEP 60455-970 Fortaleza, CE, Brazil
| | - H D M Coutinho
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000 Crato, CE, Brazil.
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Castro AM, Reis CGC, Costa JGF, Alcântara RM, Ferreira DCA, Oliveira FS. Importance of Deciduous Teeth: Maternal Perceptions and Early Childhood Caries. Pesqui bras odontopediatria clín integr 2017. [DOI: 10.4034/pboci.2017.171.36] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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9
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Castro AM, Espinosa RCG, Pereira CAM, Castro TC, Santos MASB, Santos DR, Oliveira FS. Behavior Guidance Techniques used in Dental Care for Patients with Special Needs: Acceptance of Parents. Pesqui bras odontopediatria clín integr 2016. [DOI: 10.4034/pboci.2016.161.12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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10
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Rippe MP, Amaral R, Oliveira FS, Cesar PF, Scotti R, Valandro LF, Bottino MA. Evaluation of tensile retention of Y-TZP crowns cemented on resin composite cores: effect of the cement and Y-TZP surface conditioning. Oper Dent 2014; 40:E1-E10. [PMID: 25162722 DOI: 10.2341/13-310-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the effect of the cement type (adhesive resin, self-adhesive, glass ionomer, and zinc phosphate) on the retention of crowns made of yttria-stabilized polycrystalline tetragonal zirconia (Y-TZP). Therefore, 108 freshly extracted molars were embedded in acrylic resin, perpendicular to their long axis, and prepared for full crowns: the crown preparations were removed and reconstructed using composite resin plus fiber posts with dimensions identical to the prepared dentin. The preparations were impressed using addition silicone, and Y-TZP copings were produced, which presented a special setup for the tensile testing. Cementation was performed with two adhesive resin cements (Multilink Automix, Ivoclar-Vivadent; RelyX ARC, 3M ESPE, St Paul, MN, USA), one self-adhesive resin cement (RelyX U100, 3M ESPE), one glass ionomer based cement (RelyX Luting, 3M ESPE), and one zinc phosphate cement (Cimento de Zinco, SS White, Rio de Janeiro, Brazil). For the resin cement groups, the inner surfaces of the crowns were subjected to three surface treatments: cleaning with isopropyl alcohol, tribochemical silica coating, or application of a thin low-fusing glass porcelain layer plus silanization. After 24 hours, all groups were subjected to thermocycling (6000 cycles) and included in a special device for tensile testing in a universal testing machine to test the retention of the infrastructure. After testing, the failure modes of all samples were analyzed under a stereomicroscope. The Kruskal-Wallis test showed that the surface treatment and cement type (α=0.05) affected the tensile retention results. The Multilink cement presented the highest tensile retention values, but that result was not statistically different from RelyX ARC. The surface treatment was statistically relevant only for the Multilink cement. The cement choice was shown to be more important than the crown surface treatment for cementation of a Y-TZP crown to a composite resin substrate.
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Oliveira FS, Bellesini LS, Defino HLA, da Silva Herrero CF, Beloti MM, Rosa AL. Hedgehog signaling and osteoblast gene expression are regulated by purmorphamine in human mesenchymal stem cells. J Cell Biochem 2012; 113:204-8. [PMID: 21898541 DOI: 10.1002/jcb.23345] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Several biological events are controlled by Hedgehog (Hh) signaling, including osteoblast phenotype development. This study aimed at evaluating the gene expression profile of human mesenchymal stem cells (hMSCs) treated with the Hh agonist, purmorphamine, focusing on Hh signaling and osteoblast differentiation. hMSCs from bone marrow were cultured in non-osteogenic medium with or without purmorphamine (2 µM) for periods of up to 14 days. Purmorphamine up-regulated gene expression of the mediators of Hh pathway, SMO, PTCH1, GLI1, and GLI2. The activation of Hh pathway by purmorphamine increased the expression of several genes (e.g., RUNX2 and BMPs) related to osteogenesis. Our results indicated that purmorphamine triggers Hh signaling pathway in hMSCs, inducing an increase in the expression of a set of genes involved in the osteoblast differentiation program. Thus, we conclude that Hh is a crucial pathway in the commitment of undifferentiated cells to the osteoblast lineage.
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Affiliation(s)
- F S Oliveira
- Cell Culture Laboratory, School of Dentistry of Ribeirao Preto, University of Sao Paulo, 14040-904 Ribeirao Preto, Sao Paulo, Brazil
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Assunção M, Oliveira FS, Mazza BF, Freitas F, Jackiu M, Machado FR. Risk factors for intra-abdominal hypertension and abdominal compartment syndrome in patients admitted to the ICU. Crit Care 2011. [PMCID: PMC3124216 DOI: 10.1186/cc10214] [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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Baptista C, Schubach AO, Madeira MF, Leal CA, Pires MQ, Oliveira FS, Conceição-Silva F, Rosalino CMV, Salgueiro MM, Pacheco RS. Leishmania (Viannia) braziliensis genotypes identified in lesions of patients with atypical or typical manifestations of tegumentary leishmaniasis: evaluation by two molecular markers. Exp Parasitol 2008; 121:317-22. [PMID: 19135053 DOI: 10.1016/j.exppara.2008.12.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Revised: 12/03/2008] [Accepted: 12/05/2008] [Indexed: 10/21/2022]
Abstract
Analyses of MLEE, RAPD and LSSP-PCR were used to compare the panel of american tegumentary leishmaniasis (ATL) isolates obtained from lesions of patients with rare clinical manifestations of the disease and typical lesions. All of the 34 samples analyzed by MLEE demonstrated similar electromorphic profiles with Leishmania (Viannia) braziliensis reference strain. Through the RAPD analysis, nine genetic profiles (genotypes) were identified. LSSP-PCR corroborates the initial screening and phenetic analysis has grouped the isolates into two major clusters comprising the nine different genotypes. Prevalent genotype defined as LbmtDNAgen1 was detected in the largest number of isolates. There was no association between genotypes and clinical symptoms. However, two different genotypes could be identified in the initial (LbmtDNAGen9) and reactivated lesion (LbmtDNAGen3) of the same patient. Our results support the idea of a less pronounced genotypic diversity among L. (V.) braziliensis circulating in the State of Rio de Janeiro and demonstrate the useful application of these molecular markers in genetics variability studies.
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Affiliation(s)
- C Baptista
- Centro de Referência em Leishmanioses, Instituto de Pesquisa Clínica Evandro Chagas, IPEC/Fiocruz, Av. Brasil, 4365, Rio de Janeiro, CEP 21040-900, Brazil.
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Bulhões AC, Goldani HAS, Oliveira FS, Matte US, Mazzuca RB, Silveira TR. Correlation between lactose absorption and the C/T-13910 and G/A-22018 mutations of the lactase-phlorizin hydrolase (LCT) gene in adult-type hypolactasia. Braz J Med Biol Res 2008; 40:1441-6. [PMID: 17934640 DOI: 10.1590/s0100-879x2007001100004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Accepted: 08/27/2007] [Indexed: 11/22/2022] Open
Abstract
The C/T-13910 mutation is the major factor responsible for the persistence of the lactase-phlorizin hydrolase (LCT) gene expression. Mutation G/A-22018 appears to be only in co-segregation with C/T-13910. The objective of the present study was to assess the presence of these two mutations in Brazilian individuals with and without lactose malabsorption diagnosed by the hydrogen breath test (HBT). Ten milk-tolerant and 10 milk-intolerant individuals underwent the HBT after oral ingestion of 50 g lactose (equivalent to 1 L of milk). Analyses for C/T-13910 and G/A-22018 mutations were performed using a PCR-based method. Primers were designed for this study based on the GenBank sequence. The CT/GA, CT/AA, and TT/AA genotypes (lactase persistence) were found in 10 individuals with negative HBT. The CC/GG genotype (lactase non-persistence) was found in 10 individuals, 9 of them with positive HBT results. There was a significant agreement between the presence of mutations in the LCT gene promoter and HBT results (kappa = -0.9, P < 0.001). The CT/AA genotype has not been described previously and seems to be related to lactase persistence. The present study showed a significant agreement between the occurrence of mutations G/A-22018 and C/T-13910 and lactose absorption in Brazilian subjects, suggesting that the molecular test used here could be proposed for the laboratory diagnosis of adult-type primary hypolactasia.
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Affiliation(s)
- A C Bulhões
- Laboratório Experimental de Gastroenterologia e Hepatologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil.
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Oliveira FS, Canola JC, Oliveira PT, Pécora JD, Capelli A. Microscopic characterization of teeth of pacas bred in captivity (Agouti paca, Linnaeus, 1766). Anat Histol Embryol 2007; 36:371-4. [PMID: 17845228 DOI: 10.1111/j.1439-0264.2007.00768.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The microscopic description of the teeth of pacas (Agouti paca) bred in captivity was developed for providing biological data on one of the largest American wild rodents, as not many references exist in the literature about this species. Two newborn males, two adult males (9 and 72 months old), one newborn female and two adult females (30 and 54 months old) were used after death due to fights, neonatal cannibalism or unknown causes. Animals were radiographed, and their teeth were extracted and put on an acrylic resin block, cut on a diamond-like disc microtome and diaphanized. It was noted that enamel surrounds the coronary dentine and projects to the root region, besides being present as internal laminae, arranged in a parallel way and in the vestibulolingual direction. The dentine is located between the enamel laminae and surrounds the pulp horns. The cementum is located internal to the enamel laminae. From scanning electronic microscopy, we find that the enamel is the outer element on the vestibular surface, and it is in direct contact with the dentine. On the lingual surface, the cementum and dentine are the outer elements.
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Affiliation(s)
- F S Oliveira
- Animal Clinics and Surgery Department, Faculty of Veterinary, São Paulo State University (UNESP), Jaboticabal, SP, Brazil
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Oliveira FS, Canola JC, Oliveira PT, Pécora JD, Capelli A. Anatomoradiographic Description of the Teeth of Pacas Bred in Captivity (Agouti paca, Linnaeus, 1766). Anat Histol Embryol 2006; 35:316-8. [PMID: 16968251 DOI: 10.1111/j.1439-0264.2006.00686.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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
Two newborn males, two adult males 9 and 72 months old, one newborn female and two adult females of 30 and 54 months old pacas were used. Animals were radiographed on lateral recumbency, teeth were extracted and the vestibulolingual and mesiodistal lengths were achieved at the occlusal surface, besides the longitudinal length. The lower incisors presented greater length in relation to the other ones and sinuous shape; the upper incisors, relatively smaller, are practically straight. There is no canine tooth, and after a great diastema there is one premolar and three molars in each hemiarcade. In adult pacas, the enamel of incisors presents yellowish colour, mainly in the labial surface; in the premolars and molars, the enamel is present as internal sheets disposed nearly in a parallel way and in vestibulolingual direction, through practically all the dental length, which provides several joined teeth aspect.
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Affiliation(s)
- F S Oliveira
- Animal Clinics and Surgery Department, Faculty of Veterinary, São Paulo State University (UNESP), Jaboticabal, SP, 14884-900 Brazil.
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Madeira MF, Schubach A, Schubach TMP, Pacheco RS, Oliveira FS, Pereira SA, Figueiredo FB, Baptista C, Marzochi MCA. Mixed infection with Leishmania (Viannia) braziliensis and Leishmania (Leishmania) chagasi in a naturally infected dog from Rio de Janeiro, Brazil. Trans R Soc Trop Med Hyg 2006; 100:442-5. [PMID: 16257024 DOI: 10.1016/j.trstmh.2005.07.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Revised: 07/26/2005] [Accepted: 07/26/2005] [Indexed: 11/24/2022] Open
Abstract
We report here the first case of co-infection with Leishmania (Viannia) braziliensis and Leishmania (Leishmania) chagasi in a naturally infected dog from Rio de Janeiro, Brazil. Isoenzyme characterisation identified the parasites isolated in culture from the cutaneous lesion as L. (V.) braziliensis and the isolates from blood and lymph node as L. (L.) chagasi. PCR analysis using specific primers followed by molecular hybridisation for direct Leishmania species identification in tissue fragments confirmed the presence of L. (V.) braziliensis DNA in the cutaneous lesion and of L. (L.) chagasi DNA in spleen and popliteal lymph node fragments. This report emphasises the importance of identification of Leishmania species infecting seropositive dogs in endemic areas, and the consequent re-assessment of control and epidemiological surveillance measures for the control of leishmaniasis, as is the case in Brazil.
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Affiliation(s)
- M F Madeira
- Serviço de Parasitologia, Instituto de Pesquisa Clínica Evandro Chagas--FIOCRUZ, Av. Brasil 4365, 21045-900 Rio de Janeiro, RJ, Brazil.
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Cabral VP, Oliveira FS, Machado MR, Ribeiro AA, Orsi AM. Study of lobation and vascularization of the lungs of wild boar (Sus scrofa). Anat Histol Embryol 2001; 30:205-9. [PMID: 11534325 DOI: 10.1046/j.1439-0264.2001.00315.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The purpose of this study was to describe the anatomy of the lungs of wild boars for comparison with those of domestic swine. It was found that the right lung of the wild boar is divided into four lobes: cranial, median, caudal and accessory, whereas the left lung is divided into two lobes: cranial and caudal. In 93.4% of the cases, right pulmonary artery separates into the ascendant, descendant, median, accessory and caudal branches. In 73.3% of the cases, left pulmonary artery separates most frequently to form three branches to the cranial lobe, whereas the median lobe is generally supplied by only one arterial branch. There is a single pattern of bronchial distribution: in the right lung a tracheal bronchus leads to the cranial lobe, where it separates into the cranial and caudal bronchi and there are also bronchi to the median, caudal and accessory lobes. In the left lung, the large bronchus separates to form two branches, one of which further separates to form two branches to the cranial lobe whereas the other forms a single branch to the caudal lobe.
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Affiliation(s)
- V P Cabral
- Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal da Universidade Estadual Paulista (UNESP), SP, Brazil
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