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Pascoal VDB, Marchesini RB, Athié MCP, Matos AHB, Conte FF, Pereira TC, Secolin R, Gilioli R, Malheiros JM, Polli RS, Tannús A, Covolan L, Pascoal LB, Vieira AS, Cavalheiro EA, Cendes F, Lopes-Cendes I. Modulating Expression of Endogenous Interleukin 1 Beta in the Acute Phase of the Pilocarpine Model of Epilepsy May Change Animal Survival. Cell Mol Neurobiol 2023; 43:367-380. [PMID: 35061107 DOI: 10.1007/s10571-022-01190-y] [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: 06/04/2021] [Accepted: 01/05/2022] [Indexed: 01/07/2023]
Abstract
The pilocarpine-induced (PILO) model has helped elucidate the electrophysiological and molecular aspects related to mesial temporal lobe epilepsy. It has been suggested that the extensive cell death and edema observed in the brains of these animals could be induced by increased inflammatory responses, such as the rapid release of the inflammatory cytokine interleukin 1 beta (Il1b). In this study, we investigate the role of endogenous Il1b in the acute phase of the PILO model. Our aim is twofold. First, we want to determine whether it is feasible to silence Il1b in the central nervous system using a non-invasive procedure. Second, we aim to investigate the effect of silencing endogenous Il1b and its antagonist, Il1rn.We used RNA interference applied non-invasively to knockdown Il1b and its endogenous antagonist Il1rn. We found that knocking down Il1b prior to pilocarpine injection increased the mortality rate of treated animals. Furthermore, we observed that, when exposing the animals to more Il1b by silencing its endogenous antagonist Il1rn, there was a better response to status epilepticus with decreased animal mortality in the acute phase of the PILO model. Thus, we show the feasibility of using a novel, less invasive approach to study genes involved in the inflammatory response in the central nervous system. Furthermore, our results provide suggestive evidence that modulating endogenous Il1b improves animal survival in the acute phase of the PILO model and may have effects that extend into the chronic phase.
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Affiliation(s)
- V D B Pascoal
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil.,Department of Basic Science, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - R B Marchesini
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil
| | - M C P Athié
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil
| | - A H B Matos
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil
| | - F F Conte
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil
| | - T C Pereira
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil.,Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, University of Sao Paulo (USP), Ribeirao Preto, SP, Brazil
| | - R Secolin
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil.,Department of Basic Science, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - R Gilioli
- Multidisciplinary Centre for Biological Investigation (CEMIB), University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - J M Malheiros
- Centro de Imagens e Espectroscopia por Ressonancia Magnetica (CIERMag), Institute of Physics, University of Sao Paulo (USP), Sao Carlos, SP, Brazil.,Department of Physiology, Federal University of Sao Paulo (UNIFESP), Sao Paulo, SP, Brazil
| | - R S Polli
- Institute of Science and Technology, Federal University of São Paulo, São José dos Campos, SP, Brazil
| | - A Tannús
- Centro de Imagens e Espectroscopia por Ressonancia Magnetica (CIERMag), Institute of Physics, University of Sao Paulo (USP), Sao Carlos, SP, Brazil
| | - L Covolan
- Department of Physiology, Federal University of Sao Paulo (UNIFESP), Sao Paulo, SP, Brazil
| | - L B Pascoal
- Laboratory of Cell Signaling, School of Medical Sciences, University of Campinas - (UNICAMP), Campinas, SP, Brazil
| | - A S Vieira
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas - (UNICAMP), Campinas, SP, Brazil
| | - E A Cavalheiro
- Department of Neurology and Neurosurgery, Federal University of Sao Paulo, (UNIFESP), Sao Paulo, SP, Brazil
| | - F Cendes
- Department of Neurology, School of Medical Sciences, University of Campinas - (UNICAMP); and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, SP, Brazil
| | - I Lopes-Cendes
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), and the Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Tessália Vieira de Camargo, 126, Cidade Universitária "Zeferino Vaz", Campinas, SP, 13083-887, Brazil.
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Camilo CM, Bento RA, Santos JAD, Rossetto DE, Pereira TC. PERFIL DE REAÇÕES TRANSFUSIONAIS OCORRIDAS NO ANO DE 2021 A 2022 EM HOSPITAL REFERÊNCIA DA ZONA SUL DE SÃO PAULO COM ATENDIMENTO ADULTO E PEDIÁTRICO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.917] [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: 11/05/2022] Open
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Braga FO, Pereira TC, Monteiro CRA, Alves PRG. PERFIL EPIDEMIOLÓGICO DE PACIENTES COM DOENÇAS NEUROLÓGICAS SUBMETIDOS A PLASMAFÉRESE EM 5 HOSPITAIS DE SÃO PAULO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.859] [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: 11/07/2022] Open
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Pereira TC, Dijkstra RJB, Petridis X, Sharma PK, van de Meer WJ, van der Sluis LWM, de Andrade FB. Chemical and mechanical influence of root canal irrigation on biofilm removal from lateral morphological features of simulated root canals, dentine discs and dentinal tubules. Int Endod J 2020; 54:112-129. [PMID: 32880989 PMCID: PMC7839520 DOI: 10.1111/iej.13399] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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: 12/20/2019] [Accepted: 08/26/2020] [Indexed: 01/08/2023]
Abstract
Aim To investigate the anti‐biofilm efficacy of irrigation using a simulated root canal model, the chemical effect of irrigants against biofilms grown on dentine discs and their impact on biofilm viscoelasticity, the efficacy of the irrigants in decontaminating infected dentinal tubules and the capacity of bacteria to regrow. Methodology Biofilm removal, viscoelastic analysis of remaining biofilms and bacterial viability were evaluated using a simulated root canal model with lateral morphological features, dentine discs and a dentinal tubule model, respectively. Experiments were conducted using a two‐phase irrigation protocol. Phase 1: a modified salt solution (RISA) and sodium hypochlorite (NaOCl) were used at a low flow rate to evaluate the chemical action of the irrigants. Ultrasonic activation (US) of a chemically inert solution (buffer) was used to evaluate the mechanical efficacy of irrigation. Phase 2: a final irrigation with buffer at a high flow rate was performed for all groups. Optical coherence tomography (OCT), low load compression testing (LLCT) and confocal scanning laser microscopy analysis were used in the different models. One‐way analysis of variance (anova) was performed for the OCT and LLCT analysis, whilst Kruskal–Wallis and Wilcoxon ranked tests for the dentinal tubule model. Results US and high flow rate removed significantly more biofilm from the artificial lateral canal. For biofilm removal from the artificial isthmus, no significant differences were found between the groups. Within‐group analysis revealed significant differences between the steps of the experiment, with the exception of NaOCl. For the dentine discs, no significant differences regarding biofilm removal and viscoelasticity were detected. In the dentinal tubule model, NaOCl exhibited the greatest anti‐biofilm efficacy. Conclusions The mechanical effect of irrigation is important for biofilm removal. An extra high flow irrigation rate resulted in greater biofilm removal than US in the artificial isthmus. The mechanical effect of US seemed to be more effective when the surface contact biofilm–irrigant was small. After the irrigation procedures, the remaining biofilm could survive after a 5‐day period. RISA and NaOCl seemed to alter post‐treatment remaining biofilms.
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Affiliation(s)
- T C Pereira
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.,Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R J B Dijkstra
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - X Petridis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P K Sharma
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - W J van de Meer
- Department of Orthodontics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - L W M van der Sluis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F B de Andrade
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
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Pereira TC, Boutsioukis C, Dijkstra RJB, Petridis X, Versluis M, de Andrade FB, van de Meer WJ, Sharma PK, van der Sluis LWM, So MVR. Biofilm removal from a simulated isthmus and lateral canal during syringe irrigation at various flow rates: a combined experimental and Computational Fluid Dynamics approach. Int Endod J 2020; 54:427-438. [PMID: 32990985 PMCID: PMC7894139 DOI: 10.1111/iej.13420] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 12/20/2019] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 01/22/2023]
Abstract
Aim (i) To quantify biofilm removal from a simulated isthmus and a lateral canal in an artificial root canal system during syringe irrigation with NaOCl at different concentrations and delivered at various flow rates (ii) to examine whether biofilm removal is further improved by a final high‐flow‐rate rinse with an inert irrigant following irrigation with NaOCl. (iii) to simulate the irrigant flow in these areas using a computer model (iv) to examine whether the irrigant velocity calculated by the computer model is correlated to biofilm removal. Methodology Ninety‐six artificial root canals with either a simulated isthmus or lateral canal were used. A dual‐species in vitro biofilm was formed in these areas using a Constant Depth Film Fermenter. NaOCl at various concentrations (2, 5 and 10%) or adhesion buffer (control) was delivered for 30 s by a syringe and an open‐ended needle at 0.033, 0.083, or 0.166 mL s−1 or passively deposited in the main root canal (phase 1). All specimens were subsequently rinsed for 30 s with adhesion buffer at 0.166 mL s−1 (phase 2). The biofilm was scanned by Optical Coherence Tomography to determine the percentage of the remaining biofilm. Results were analysed by two 3‐way mixed‐design ANOVAs (α = 0.05). A Computational Fluid Dynamics model was used to simulate the irrigant flow inside the artificial root canal system. Results The flow rate during phase 1 and additional irrigation during phase 2 had a significant effect on the percentage of the remaining biofilm in the isthmus (P = 0.004 and P < 0.001). Additional irrigation during phase 2 also affected the remaining biofilm in the lateral canal significantly (P ≤ 0.007) but only when preceded by irrigation at medium or high flow rate during phase 1. The effect of NaOCl concentration was not significant (P > 0.05). Irrigant velocity in the isthmus and lateral canal increased with increasing flow rate and it was substantially correlated to biofilm removal from those areas. Conclusions The irrigant flow rate affected biofilm removal in vitro more than NaOCl concentration. Irrigant velocity predicted by the computer model corresponded with the pattern of biofilm removal from the simulated isthmus and lateral canal.
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Affiliation(s)
- T C Pereira
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.,Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - C Boutsioukis
- Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - R J B Dijkstra
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - X Petridis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M Versluis
- Physics of Fluids group, Technical Medical (TechMed) Center and MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - F B de Andrade
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - W J van de Meer
- Department of Orthodontics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P K Sharma
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - L W M van der Sluis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M V R So
- Conservative Dentistry Department, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre-Rio Grande do Sul, Brazil
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Pereira TC, Dijkstra RJB, Petridis X, van der Meer WJ, Sharma PK, de Andrade FB, van der Sluis LWM. The influence of time and irrigant refreshment on biofilm removal from lateral morphological features of simulated root canals. Int Endod J 2020; 53:1705-1714. [PMID: 32502284 PMCID: PMC7754391 DOI: 10.1111/iej.13342] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 05/26/2020] [Accepted: 05/29/2020] [Indexed: 12/15/2022]
Abstract
Aim To evaluate the effect of irrigant refreshment and exposure time of a 2% sodium hypochlorite solution (NaOCl) on biofilm removal from simulated lateral root canal spaces using two different flow rates. Methodology A dual‐species biofilm was formed by a Constant Depth Film Fermenter (CDFF) for 96 h in plug inserts with anatomical features resembling an isthmus or lateral canal‐like structures. The inserts were placed in a root canal model facing the main canal. NaOCl 2% and demineralized water (control group) were used as irrigant solutions. Both substances were applied at a flow rate of 0.05 and 0.1 mL s−1. The samples were divided into three groups with zero, one or two refreshments in a total exposure time of 15 min. A three‐way analysis of variance (anova) was performed to investigate the interaction amongst the independent variables and the effect of consecutive irrigant refreshment on percentage of biofilm removal. A Tukey post hoc test was used to evaluate the effect of each independent variable on percentage biofilm removal in the absence of statistically significant interactions. Results For the lateral canal, NaOCl removed significantly more biofilm irrespective of the number of refreshments and exposure time (P = 0.005). There was no significant effect in biofilm removal between the consecutive irrigant refreshments measured in the same biofilm. For the isthmus, NaOCl removed significantly more biofilm irrespective of the number of refreshments and exposure time; both NaOCl and a high flow rate removed significantly more biofilm when the exposure time was analysed (P = 0.018 and P = 0.029, respectively). Evaluating the effect of consecutive irrigant refreshment on the same biofilm, 2% NaOCl, 0.1 mL s−1 flow rate and one or two refreshments removed significant more biofilm (P = 0.04, 0.034 and 0.003, <0.001, respectively). Conclusions In this model, refreshment did not improve biofilm removal from simulated lateral root canal spaces. NaOCl removed more biofilm from the lateral canal‐ and isthmus‐like structure. A higher flow rate removed significantly more biofilm from the isthmus‐like structure. There was always remaining biofilm left after the irrigation procedures.
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Affiliation(s)
- T C Pereira
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.,Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R J B Dijkstra
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - X Petridis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - W J van der Meer
- Department of Orthodontics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P K Sharma
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F B de Andrade
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - L W M van der Sluis
- Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Rodrigues CT, de Andrade FB, de Vasconcelos LRSM, Midena RZ, Pereira TC, Kuga MC, Duarte MAH, Bernardineli N. Antibacterial properties of silver nanoparticles as a root canal irrigant against Enterococcus faecalis
biofilm and infected dentinal tubules. Int Endod J 2018; 51:901-911. [DOI: 10.1111/iej.12904] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 01/29/2018] [Indexed: 01/11/2023]
Affiliation(s)
- C. T. Rodrigues
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - F. B. de Andrade
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - L. R. S. M. de Vasconcelos
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - R. Z. Midena
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - T. C. Pereira
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - M. C. Kuga
- Department of Restorative Dentistry; Araraquara Dental School; UNESP - Paulista State University; Araraquara Brazil
| | - M. A. H. Duarte
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
| | - N. Bernardineli
- Department of Dentistry, Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru Brazil
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Lopes-Ramos CM, Pereira TC, Dogini DB, Gilioli R, Lopes-Cendes I. Lithium carbonate and coenzyme Q10 reduce cell death in a cell model of Machado-Joseph disease. ACTA ACUST UNITED AC 2016; 49:e5805. [PMID: 27878228 PMCID: PMC5188859 DOI: 10.1590/1414-431x20165805] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 09/26/2016] [Indexed: 01/09/2023]
Abstract
Machado-Joseph disease (MJD) or spinocerebellar ataxia type 3 (SCA3) is an autosomal dominant neurodegenerative disorder caused by expansion of the polyglutamine domain of the ataxin-3 (ATX3) protein. MJD/SCA3 is the most frequent autosomal dominant ataxia in many countries. The mechanism underlying MJD/SCA3 is thought to be mainly related to protein misfolding and aggregation leading to neuronal dysfunction followed by cell death. Currently, there are no effective treatments for patients with MJD/SCA3. Here, we report on the potential use of lithium carbonate and coenzyme Q10 to reduce cell death caused by the expanded ATX3 in cell culture. Cell viability and apoptosis were evaluated by MTT assay and by flow cytometry after staining with annexin V-FITC/propidium iodide. Treatment with lithium carbonate and coenzyme Q10 led to a significant increase in viability of cells expressing expanded ATX3 (Q84). In addition, we found that the increase in cell viability resulted from a significant reduction in the proportion of apoptotic cells. Furthermore, there was a significant change in the expanded ATX3 monomer/aggregate ratio after lithium carbonate and coenzyme Q10 treatment, with an increase in the monomer fraction and decrease in aggregates. The safety and tolerance of both drugs are well established; thus, our results indicate that lithium carbonate and coenzyme Q10 are good candidates for further in vivo therapeutic trials.
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Affiliation(s)
- C M Lopes-Ramos
- Departamento de Genética Médica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - T C Pereira
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - D B Dogini
- Departamento de Genética Médica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - R Gilioli
- Centro Multidisciplinar para Investigação Biológica, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - I Lopes-Cendes
- Departamento de Genética Médica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
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Savio LEB, Vuaden FC, Kist LW, Pereira TC, Rosemberg DB, Bogo MR, Bonan CD, Wyse ATS. Proline-induced changes in acetylcholinesterase activity and gene expression in zebrafish brain: reversal by antipsychotic drugs. Neuroscience 2013; 250:121-8. [PMID: 23867765 DOI: 10.1016/j.neuroscience.2013.07.004] [Citation(s) in RCA: 6] [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: 04/19/2013] [Revised: 06/10/2013] [Accepted: 07/06/2013] [Indexed: 11/28/2022]
Abstract
Hyperprolinemia is an inherited disorder of proline metabolism and hyperprolinemic patients can present neurological manifestations, such as seizures, cognitive dysfunctions, and schizoaffective disorders. However, the mechanisms related to these symptoms are still unclear. In the present study, we evaluated the in vivo and in vitro effects of proline on acetylcholinesterase (AChE) activity and gene expression in the zebrafish brain. For the in vivo studies, animals were exposed at two proline concentrations (1.5 and 3.0mM) during 1h or 7 days (short- or long-term treatments, respectively). For the in vitro assays, different proline concentrations (ranging from 3.0 to 1000 μM) were tested. Long-term proline exposures significantly increased AChE activity for both treated groups when compared to the control (34% and 39%). Moreover, the proline-induced increase on AChE activity was completely reverted by acute administration of antipsychotic drugs (haloperidol and sulpiride), as well as the changes induced in ache expression. When assessed in vitro, proline did not promote significant changes in AChE activity. Altogether, these data indicate that the enzyme responsible for the control of acetylcholine levels might be altered after proline exposure in the adult zebrafish. These findings contribute for better understanding of the pathophysiology of hyperprolinemia and might reinforce the use of the zebrafish as a complementary vertebrate model for studying inborn errors of amino acid metabolism.
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Affiliation(s)
- L E B Savio
- Laboratório de Neuroproteção e Doenças Metabólicas, Programa de Pós-Graduação em Bioquímica, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, 90035-003 Porto Alegre, RS, Brazil
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Cavenago BC, Pereira TC, Duarte MAH, Ordinola-Zapata R, Marciano MA, Bramante CM, Bernardineli N. Influence of powder-to-water ratio on radiopacity, setting time, pH, calcium ion release and a micro-CT volumetric solubility of white mineral trioxide aggregate. Int Endod J 2013; 47:120-6. [DOI: 10.1111/iej.12120] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 04/03/2013] [Indexed: 11/27/2022]
Affiliation(s)
- B. C. Cavenago
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - T. C. Pereira
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - M. A. H. Duarte
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - R. Ordinola-Zapata
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - M. A. Marciano
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - C. M. Bramante
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
| | - N. Bernardineli
- Department of Operative Dentistry; Endodontics and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru São Paulo Brazil
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Pereira TC, Pascoal VDB, Marchesini RB, Maia IG, Magalhães LA, Zanotti-Magalhães EM, Lopes-Cendes I. Schistosoma mansoni: evaluation of an RNAi-based treatment targeting HGPRTase gene. Exp Parasitol 2008; 118:619-23. [PMID: 18237732 DOI: 10.1016/j.exppara.2007.11.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 10/15/2007] [Accepted: 11/14/2007] [Indexed: 11/16/2022]
Abstract
Hypoxanthine-guanine phosphoribosyltransferase (HGPRTase) is an essential gene of the parasite Schistosoma mansoni and it is well conserved in its hosts (mouse and human) at the protein but not at the RNA level. This feature prompted us to assess RNA interference (RNAi) to combat schistosomiasis. Small interfering RNAs (siRNAs) were produced against HGPRTase, injected in infected mice and the number of worms was counted six days after injection. The total number of parasites was reduced by approximately 27% after treatment. RT-PCR analyzes showed a significant reduction in parasite target mRNA but not in host's homologue. The use of low doses of molecules did not oversaturate si- or miRNA pathways as mice survival rates were not affected by siRNAs. This is the first successful in vivo demonstration of a RNAi-based treatment against schistosomiasis. We believe that improvements in molecule delivery and an increase on siRNA dose could rapidly eliminate parasite.
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Affiliation(s)
- T C Pereira
- Departamento de Genética Médica, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz, FCM, Unicamp-Campinas, São Paulo, Brazil 13084-971
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Grion C, Cardoso L, Grion D, Chiarelli L, Pereira P, Pereira T, Yamada M. Crit Care 2003; 7:P103. [DOI: 10.1186/cc2299] [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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Pereira TC, Landreneau R, Nathan G, Sturgis CD. Pathologic quiz case. Large posterior mediastinal mass in a young woman. Pathologic diagnosis: localized hyaline-vascular-type Castleman disease (angiofollicular lymphoid hyperplasia). Arch Pathol Lab Med 2001. [PMID: 11419989 DOI: 10.1043/0003-9985(2001)125<0964: pqclpm>2.0.co; 2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- T C Pereira
- Department of Pathology, Allegheny General Hospital, Pittsburgh, PA, USA
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Pereira TC, Landreneau R, Nathan G, Sturgis CD. Pathologic quiz case. Large posterior mediastinal mass in a young woman. Pathologic diagnosis: localized hyaline-vascular-type Castleman disease (angiofollicular lymphoid hyperplasia). Arch Pathol Lab Med 2001; 125:964-7. [PMID: 11419989 DOI: 10.5858/2001-125-0964-pqclpm] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- T C Pereira
- Department of Pathology, Allegheny General Hospital, Pittsburgh, PA, USA
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Pereira TC, Vi LH, Prichard JW, Sturgis CD. Pathologic quiz case. Elderly man with bright red blood per rectum. Pathologic diagnosis: metastatic hepatic epithelioid angiosarcoma. Arch Pathol Lab Med 2001; 125:968-70. [PMID: 11419990 DOI: 10.5858/2001-125-0968-pqcemw] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- T C Pereira
- Department of Pathology, Allegheny General Hospital, Pittsburgh, PA, USA
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Abstract
Abstract
Pulse granuloma is a rare benign entity, most likely representing a foreign body reaction to vegetable particles. We report a case of a pulse granuloma involving the rectum. The patient presented with a submucosal and intramuscular mass lesion found at routine rectal examination and subsequent colonoscopy. The mass was excised and the microscopic examination revealed acute and chronic inflammatory cells, foreign-body giant cells, vegetable matter, and convoluted hyaline rings and scattered circular structures containing basophilic granules, consistent with pulse granuloma. There are a few reports in the literature of pulse granulomas, with most occurring in the oral cavity or lungs. To the best of our knowledge, this is the first reported example of pulse granuloma in the rectum. Although rare, familiarity with this entity's distinctive histopathologic features may avoid a delay in diagnosis and prevent the expense of distinguishing it from its histologic lookalikes.
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Affiliation(s)
- T C Pereira
- Department of Pathology and Laboratory Medicine, Allegheny General Hospital, Pittsburgh, PA 15212, USA
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