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García-Castañeda Z, Gomes-Azevedo S, Flores-Treviño J, González GM, Brasil SC, Souza TM, Rôças IN, Siqueira JF. Shaping ability of BlueShaper, TruNatomy, DC Taper and HyFlex EDM in long oval canals: An ex vivo study. Int Endod J 2023; 56:1147-1154. [PMID: 37334880 DOI: 10.1111/iej.13945] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/21/2023]
Abstract
AIM This study evaluated and compared the shaping ability of four rotary instrument systems in long-oval root canals using microcomputed tomographic (micro-CT) evaluation. Currently, there is no data available on the canal shaping abilities of BlueShaper and DC Taper instruments. METHODOLOGY Sixty-four single-rooted mandibular premolars were matched based on similar root canal morphologic features as determined by (micro-CT) and randomly assigned to 1 of 4 experimental groups (n = 16) according to the instrument system used: BlueShaper, TruNatomy, DC Taper and HyFlex EDM One File. Changes in the root canal surface and volume, remaining dentine thickness, and number of prepared areas were assessed. RESULTS No significant differences were found amongst the four instrument systems for the parameters evaluated (p > .05). There was a significant reduction in the number of unprepared areas and the remaining dentine thickness after each increase in size of the instruments tested (p < .05). CONCLUSIONS The four instrument systems perform similarly in long oval root canals. Although none could prepare all canal walls, larger preparations incorporated significantly more surfaces in the final shape.
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Affiliation(s)
| | - Susana Gomes-Azevedo
- Postgraduate Program in Endodontics, Universidad Autonoma de Nuevo Leon, Monterrey, Mexico
| | - Jorge Flores-Treviño
- Postgraduate Program in Endodontics, Universidad Autonoma de Nuevo Leon, Monterrey, Mexico
| | | | - Sabrina C Brasil
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Brazil
| | - Thaís M Souza
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Brazil
| | - Isabela N Rôças
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Brazil
| | - José F Siqueira
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Brazil
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Romeiro K, Brasil SC, Souza TM, Gominho LF, Pérez AR, Perez R, Alves FRF, Rôças IN, Siqueira JF. Influence of brushing motions on the shaping of oval canals by rotary and reciprocating instruments. Clin Oral Investig 2023:10.1007/s00784-023-05022-1. [PMID: 37097436 DOI: 10.1007/s00784-023-05022-1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 04/08/2023] [Indexed: 04/26/2023]
Abstract
OBJECTIVE The effects of brushing on shaping with three different instruments were assessed in oval canals. DESIGN Mandibular incisors were assigned to 6 groups (n = 12/group) according to the system, each one with or without brushing: Reciproc Blue, VDW.Rotate, and Race EVO. Micro-computed tomography was performed before and after preparation. RESULTS Brushing strokes caused no increase in canal volume, surface area, and structure model index independently of the system (p > 0.05), except for RaCe EVO in the full canal surface area (p < 0.05). Brushing did not increase the prepared areas (p > 0.05), except for Reciproc in the apical canal (p < 0.05). Reciproc with no brushing exhibited less pericervical dentin than with brushing (p < 0.05), while RaCe EVO with brushing resulted in less remaining dentin (p < 0.05). CONCLUSIONS The brushing motion had no effects on the overall shaping performance of the 3 instruments tested. An exception was the increase in prepared surface area in the apical canal segment when the Reciproc instrument was used with brushing strokes.
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Affiliation(s)
- Kaline Romeiro
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil
| | - Sabrina C Brasil
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil
| | - Thaís M Souza
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil
| | - Luciana F Gominho
- Department of Restorative Dentistry, Federal University of Paraíba (UFPB), Paraíba, João Pessoa, PB, Brazil
| | - Alejandro R Pérez
- Department of Endodontics, University Rey Juan Carlos, Madrid, Spain
| | | | - Flávio R F Alves
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil.
| | - Isabela N Rôças
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil
| | - José F Siqueira
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rua Professor José de Souza Herdy, 1160, Duque de Caxias, Rio de Janeiro, RJ, 25071-202, Brazil
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Tavares FA, Souza TM, Cavalcante RS, Castro AB, Jamas MT, Miranda CL, Garcia PC. CORRELAÇÃO ENTRE OS GRUPOS SANGUÍNEOS E AS ALTERAÇÕES IMUNO-HEMATOLÓGICAS NA COVID-19. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Nunes EA, Lopes GO, Araújo GMB, Inacio JO, Gonçalves LF, Del-Fiaco NV, Gontijo TAM, Souza TM. LINFOMA DE GRANDES CÉLULAS B INTRAVASCULAR: UM RELATO DE CASO. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Souza TM, van den Beucken T, Kleinjans JCS, Jennen DGJ. Inferring transcription factor activity from microarray data reveals novel targets for toxicological investigations. Toxicology 2017; 389:101-107. [PMID: 28743512 DOI: 10.1016/j.tox.2017.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/12/2017] [Accepted: 07/13/2017] [Indexed: 01/09/2023]
Abstract
Transcription factors (TFs) are important modulators of the inducible portion of the transcriptome, and therefore relevant in the context of exposure to exogenous compounds. Current approaches to predict the activity of TFs in biological systems are usually restricted to a few entities at a time due to low-throughput techniques targeting a limited fraction of annotated human TFs. Therefore, high-throughput alternatives may help to identify new targets of mechanistic and predictive value in toxicological investigations. In this study, we inferred the activity multiple TFs using publicly available microarray data from primary human hepatocytes exposed to hundreds of chemicals and evaluated these molecular profiles using multiple correspondence analysis. Our results demonstrate that the lowest dose and latest exposure time (24h) in a subset of chemicals generates a signature indicative of carcinogenicity possibly due to DNA-damaging properties. Furthermore, profiles from the earliest exposure time (2h) and highest dose creates clusters of chemicals implicated in the development of diverse forms of drug-induced liver injury (DILI). Both approaches yielded a number of TFs with similar activity across groups of chemicals, including TFs known in toxicological responses such as AhR, NFE2L2 (Nrf2), NF-κB and PPARG. FOXM1, IRF1 and E2F4 were some of the TFs identified that may be relevant in genotoxic carcinogenesis. SMADs (SMAD1, SMAD2, SMAD5) and KLF5 were identified as some of potentially new TFs whose inferred activities were linked to acute and progressive outcomes in DILI. In conclusion this study offers a novel mechanistic approach targeting TF activity during chemical exposure.
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Affiliation(s)
- T M Souza
- Department of Toxicogenomics, GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, 6229 ER, The Netherlands.
| | - T van den Beucken
- Department of Toxicogenomics, GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, 6229 ER, The Netherlands
| | - J C S Kleinjans
- Department of Toxicogenomics, GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, 6229 ER, The Netherlands
| | - D G J Jennen
- Department of Toxicogenomics, GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, 6229 ER, The Netherlands
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Morais-Braga MFB, Souza TM, Santos KKA, Guedes GMM, Andrade JC, Tintino SR, Sobral-Souza CE, Costa JGM, Saraiva AAF, Coutinho HDM. Phenolic compounds and interaction between aminoglycosides and natural products of Lygodium venustum SW against multiresistant bacteria. Chemotherapy 2012; 58:337-40. [PMID: 23171666 DOI: 10.1159/000343044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 08/29/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND The aim of this work was to evaluate the interactions between aminoglycosides and the ethyl-acetate fraction of the fern Lygodium venustum SW (EAFLV) METHODS: The ethyl-acetate fraction was obtained from the ethanol extract of L. venustum and was assayed via the checkerboard method associated with aminoglycosides against two bacterial strains multiresistant to antibiotics. RESULTS The antibiotic activity of all drugs, when associated with the ethyl-acetate fraction, was enhanced in an additive manner, except for the association between EAFLV and amikacin, which showed a synergistic interaction against the Escherichia coli strain. CONCLUSIONS The results indicated that L. venustum can be a source of secondary metabolites to be used in association with antibiotics like aminoglycosides in antibiotic chemotherapy against resistant bacteria.
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Affiliation(s)
- M F B Morais-Braga
- Laboratory of Microbiology and Molecular Biology, Regional University of Cariri, Crato, Brazil
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Souza TM, Farias DF, Soares BM, Viana MP, Lima GPG, Machado LKA, Morais SM, Carvalho AFU. Toxicity of Brazilian plant seed extracts to two strains of Aedes aegypti (Diptera: Culicidae) and nontarget animals. J Med Entomol 2011; 48:846-851. [PMID: 21845944 DOI: 10.1603/me10205] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Seed ethanolic extracts of 21 Brazilian plants were evaluated for ovicidal, larvicidal, and pupicidal activities against insecticide-susceptible (SS) and field-collected (FC) strains of Aedes aegypti (L.) (Diptera: Culicidae), as well as for their effects on nontarget organisms. Myracrodruon urundeuva Fr. Allemao extract was highly toxic to both mosquito strains. Schinopsis brasiliensis Engler extract showed low toxicity and was 38-68 times less toxic to Ae. aegypti larvae than was M. urundeuva extract. The pupicidal activity (LC50) of 14 plant seed extracts ranged between 9 and 433/g/ml, and toxicities were comparable to both mosquito strains. Piptadenia moniliformis Benth. and Luetzelburgia auriculata (Allemao) Ducke extracts showed the highest activities against pupae of FC and SS strains. None of the extracts showed 100% ovicidal activity. In addition, the active extracts did not show high acute toxicity to mice (LD50 > 1.5 g/kg), except that of Enterolobium contortisiliquum (Vell.) Morong. Most of the active extracts exhibited low toxicity against brine shrimp (Artemia sp.) nauplii. The extracts of M. urundeuva, P. moniliformis, and L. auriculata are promising sources of recognized classes of insecticidal compounds with good selectivity against immature stages of Ae. aegypti.
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Affiliation(s)
- T M Souza
- Department of Biology, Campus do Pici, Federal University of Ceara, 60455-760 Fortaleza, CE, Brazil
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Souza CG, Moreira JD, Siqueira IR, Pereira AG, Rieger DK, Souza DO, Souza TM, Portela LV, Perry MLS. Highly palatable diet consumption increases protein oxidation in rat frontal cortex and anxiety-like behavior. Life Sci 2007; 81:198-203. [PMID: 17574275 DOI: 10.1016/j.lfs.2007.05.001] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Revised: 04/19/2007] [Accepted: 05/02/2007] [Indexed: 01/09/2023]
Abstract
Obesity is frequently associated with consumption of high amounts of sugar and/or fat. Studies have demonstrated a high prevalence of overweight and obesity associated or not with increase rates of psychiatry disorders, in particular mood and anxiety disorders. Recent works have demonstrated an association between specific genes involved in oxidative stress metabolism and anxiety-like behavior. The aim of this study was to investigate the effect of a highly palatable diet enriched with sucrose in body fat mass composition, anxiety behavior and brain oxidative status. Twenty male Wistar rats received two different diets during four months: standard chow (SC) and highly palatable (HP). Metabolic parameters, behavioral tests and oxidative stress status were evaluated. Body fat mass, insulin sensitivity and glucose tolerance were altered in the HP group (p<0.01). The same group spends less time in light compartment and had a lower risk assessment behavior (p<0.05) but no differences were observed in the open field test habituation (p>0.05). Protein degradation, DCF and TBARS levels were not different in the hippocampus between groups; however, there were higher levels of protein degration in frontal cortex of HP groups (p<0.05), although DCF and TBARS levels don't differ from the SC group (p>0.05). In conclusion, our data suggest that the consumption of HP diet leads to an obese phenotype, increases protein oxidation in frontal cortex and appears to induce anxiety-like behavior in rats.
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Affiliation(s)
- C G Souza
- Departamento de Bioquímica, ICBS, Rua Ramiro Barcelos, 2600 anexo, CEP 90035003, Porto Alegre, RS, Brazil.
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