1
|
Silva AF, Torres MDT, Silva LS, Alves FL, Miranda A, Oliveira VX, de la Fuente-Nunez C, Pinheiro AAS. Synthetic angiotensin II peptide derivatives confer protection against cerebral and severe non-cerebral malaria in murine models. Sci Rep 2024; 14:4682. [PMID: 38409185 PMCID: PMC10897374 DOI: 10.1038/s41598-024-51267-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/03/2024] [Indexed: 02/28/2024] Open
Abstract
Malaria can have severe long-term effects. Even after treatment with antimalarial drugs eliminates the parasite, survivors of cerebral malaria may suffer from irreversible brain damage, leading to cognitive deficits. Angiotensin II, a natural human peptide hormone that regulates blood pressure, has been shown to be active against Plasmodium spp., the etiologic agent of malaria. Here, we tested two Ang II derivatives that do not elicit vasoconstriction in mice: VIPF, a linear tetrapeptide, which constitutes part of the hydrophobic portion of Ang II; and Ang II-SS, a disulfide-bridged derivative. The antiplasmodial potential of both peptides was evaluated with two mouse models: an experimental cerebral malaria model and a mouse model of non-cerebral malaria. The latter consisted of BALB/c mice infected with Plasmodium berghei ANKA. The peptides had no effect on mean blood pressure and significantly reduced parasitemia in both mouse models. Both peptides reduced the SHIRPA score, an assay used to assess murine health and behavior. However, only the constrained derivative (Ang II-SS), which was also resistant to proteolytic degradation, significantly increased mouse survival. Here, we show that synthetic peptides derived from Ang II are capable of conferring protection against severe manifestations of malaria in mouse models while overcoming the vasoconstrictive side effects of the parent peptide.
Collapse
Affiliation(s)
- Adriana F Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Marcelo D T Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Leandro S Silva
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Flavio L Alves
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil
| | - Antonio Miranda
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Vani X Oliveira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA.
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA.
| | - Ana Acacia S Pinheiro
- Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| |
Collapse
|
2
|
David C, de Souza JF, Silva AF, Grazioli G, Barboza AS, Lund RG, Fajardo AR, Moraes RR. Cannabidiol-loaded microparticles embedded in a porous hydrogel matrix for biomedical applications. J Mater Sci Mater Med 2024; 35:14. [PMID: 38353746 PMCID: PMC10866797 DOI: 10.1007/s10856-023-06773-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 12/19/2023] [Indexed: 02/16/2024]
Abstract
In this study, poly (lactic-co-glycolic acid) (PLGA) microparticles loaded with cannabidiol (CBD) were synthesized (PLGA@CBD microparticles) and embedded up to 10 wt% in a chondroitin sulfate/polyvinyl alcohol hydrogel matrix. In vitro chemical, physical, and biological assays were carried out to validate the potential use of the modified hydrogels as biomaterials. The microparticles had spherical morphology and a narrow range of size distribution. CBD encapsulation efficiency was around 52%, loading was approximately 50%. Microparticle addition to the hydrogels caused minor changes in their morphology, FTIR and thermal analyses confirmed these changes. Swelling degree and total porosity were reduced in the presence of microparticles, but similar hydrophilic and degradation in phosphate buffer solution behaviors were observed by all hydrogels. Rupture force and maximum strain at rupture were higher in the modified hydrogels, whereas modulus of elasticity was similar across all materials. Viability of primary human dental pulp cells up to 21 days was generally not influenced by the addition of PLGA@CBD microparticles. The control hydrogel showed no antimicrobial activity against Staphylococcus aureus, whereas hydrogels with 5% and 10% PLGA@CBD microparticles showed inhibition zones. In conclusion, the PLGA@CBD microparticles were fabricated and successfully embedded in a hydrogel matrix. Despite the hydrophobic nature of CBD, the physicochemical and morphological properties were generally similar for the hydrogels with and without the CBD-loaded microparticles. The data reported in this study suggested that this original biomaterial loaded with CBD oil has characteristics that could enable it to be used as a scaffold for tissue/cellular regeneration.
Collapse
Affiliation(s)
- Carla David
- Biopathological Research Group, Faculty of Dentistry (GIBFO), University of the Andes, Mérida, Venezuela.
- Graduate Program in Dentistry, Universidade Federal de Pelotas, Pelotas, Brazil.
| | - Jaqueline F de Souza
- Laboratory of Technology and Development of Composites and Polymeric Materials-LaCoPol, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Adriana F Silva
- Graduate Program in Dentistry, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Guillermo Grazioli
- Department of Dental Materials, Universidad de la República, Montevideo, Uruguay
| | - Andressa S Barboza
- Graduate Program in Dentistry, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Rafael G Lund
- Graduate Program in Dentistry, Universidade Federal de Pelotas, Pelotas, Brazil
| | - André R Fajardo
- Laboratory of Technology and Development of Composites and Polymeric Materials-LaCoPol, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Rafael R Moraes
- Graduate Program in Dentistry, Universidade Federal de Pelotas, Pelotas, Brazil
| |
Collapse
|
3
|
Silva AF, Frazão-Teixeira E, Oliveira FCR, Fonseca ABM, Ferreira AMR. Toxoplasma gondii in tissues of sheep slaughtered for human consumption in a highly endemic area for toxoplasmosis in Brazil. Vet Parasitol Reg Stud Reports 2022; 29:100688. [PMID: 35256116 DOI: 10.1016/j.vprsr.2022.100688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 12/02/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
Toxoplasma gondii infects warm-blooded animals, including humans, and the ingestion of undercooked meat of infected animals is an important source of infection. We investigated the presence of T. gondii by PCR and histopathology in tissues of 25 seropositive sheep slaughtered for human consumption in Rio de Janeiro and assessed the suitability of different tissues for molecular detection of the parasite. The animals were first screened for T. gondii antibodies by MAT (Modified Agglutination Test), and tissues of seropositive sheep (brain, heart, lungs, kidneys, liver and diaphragm) were subjected to molecular and histological examination. A nested-PCR targeting the P43 gene of T. gondii was performed, and kappa Coefficient was used to assess PCR results among tissues. DNA of the parasite was detected in 60 % (9 of 15) of the animals. and tissue pairs of lungs/heart, lungs/diaphragm or heart/diaphragm had substantial agreement with the global status of the animals. The combination between these three tissues leads to an almost perfect agreement with global status results. Sheep slaughtered for human consumption in Rio de Janeiro, Brazil are infected with T. gondii, and pairs of fragments of lungs and heart, lungs and diaphragm or heart and diaphragm could be used for molecular identification of T. gondii in sheep with substantial agreement with the global status of the animals.
Collapse
Affiliation(s)
- A F Silva
- Programa de Pós-Graduação em Medicina Veterinária, Departamento de Medicina e Cirurgia Veterinária, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - E Frazão-Teixeira
- Laboratório de Biologia Estrutural, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, Rio de Janeiro, RJ 21040-361, Brazil / Laboratório de Sanidade Animal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego 2000, Campos dos Goytacazes, RJ 28013-602, Brazil
| | - F C R Oliveira
- Laboratório de Sanidade Animal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil
| | - A B M Fonseca
- Departamento de Estatística, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil
| | - A M R Ferreira
- Laboratório de Anatomia Patológica Veterinária, Programa de Pós-Graduação em Medicina Veterinária, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
4
|
van de Steeg AW, Vialetto L, Silva AF, Peeters FJJ, van den Bekerom DCM, Gatti N, Diomede P, van de Sanden MCM, van Rooij GJ. Revisiting spontaneous Raman scattering for direct oxygen atom quantification. Opt Lett 2021; 46:2172-2175. [PMID: 33929446 DOI: 10.1364/ol.424102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
In this Letter, the counterintuitive and largely unknown Raman activity of oxygen atoms is evaluated for its capacity to determine absolute densities in gases with significant O-density. The study involves ${\rm CO}_2$ microwave plasma to generate a self-calibrating mixture and establish accurate cross sections for the $^3{\!P_2}{\leftrightarrow ^3}{\!P_1}$ and $^3{\!P_2}{\leftrightarrow ^3}{\!P_0}$ transitions. The approach requires conservation of stoichiometry, confirmed within experimental uncertainty by a 1D fluid model. The measurements yield ${\sigma _{J = 2 \to 1}} = 5.27 \pm _{{\rm sys}:0.53}^{{\rm rand}:0.17} \times {10^{- 31}}\;{{\rm cm}^2}/{\rm sr}$ and ${\sigma _{J = 2 \to 0}} = 2.11 \pm _{{\rm sys}:0.21}^{{\rm rand}:0.06} \times {10^{- 31}}\;{{\rm cm}^2}/{\rm sr}$, and the detection limit is estimated to be $1 \times {10^{15}}\;{{\rm cm}^{- 3}}$ for systems without other scattering species.
Collapse
|
5
|
Grazioli G, Silva AF, Souza JF, David C, Diehl L, Sousa-Neto MD, Cava SS, Fajardo AR, Moraes RR. Synthesis and characterization of poly(vinyl alcohol)/chondroitin sulfate composite hydrogels containing strontium-doped hydroxyapatite as promising biomaterials. J Biomed Mater Res A 2020; 109:1160-1172. [PMID: 32985092 DOI: 10.1002/jbm.a.37108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/21/2020] [Accepted: 09/26/2020] [Indexed: 01/20/2023]
Abstract
Novel poly(vinyl alcohol)/chondroitin sulfate (PVA/CS) composite hydrogels containing hydroxyapatite (HA) or Sr-doped HA (HASr) particles were synthesized by a freeze/thaw method and characterized aiming towards biomedical applications. HA and HASr were synthesized by a wet-precipitation method and added to the composite hydrogels in fractions up to 15 wt%. Physical-chemical characterizations of particles and hydrogels included scanning electron microscopy, energy-dispersive spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetry, porosity, compressive strength/elastic modulus, swelling degree, and cell viability. Particles were irregular in shape and appeared to have narrow size variation. The thermal behavior of composite hydrogels was altered compared to the control (bare) hydrogel. All hydrogels exhibited high porosity. HA/HASr particles reduced total porosity without reducing pore size. The mechanical strength was improved as the fraction of HA or HASr was increased. HASr particles led to a faster water uptake but did not interfere with the total hydrogel swelling capacity. In cell viability essay, increased cell growth (above 120%) was observed in all groups including the control hydrogel, suggesting a bioactive effect. In conclusion, PVA/CS hydrogels containing HA or HASr particles were successfully synthesized and showed promising morphological, mechanical, and swelling properties, which are particularly required for scaffolding.
Collapse
Affiliation(s)
- Guillermo Grazioli
- Department of Dental Materials, University of the Republic, Montevideo, Uruguay.,Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Adriana F Silva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Jaqueline F Souza
- Laboratory of Technology and Development of Composites and Polymeric Materials - LaCoPol, Federal University of Pelotas, Pelotas, Brazil
| | - Carla David
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Lisiane Diehl
- Advanced Crystal Growth and Photonics - CCAF, Federal University of Pelotas, Pelotas, Brazil
| | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Sergio S Cava
- Advanced Crystal Growth and Photonics - CCAF, Federal University of Pelotas, Pelotas, Brazil
| | - André R Fajardo
- Laboratory of Technology and Development of Composites and Polymeric Materials - LaCoPol, Federal University of Pelotas, Pelotas, Brazil
| | - Rafael R Moraes
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| |
Collapse
|
6
|
Torres MDT, Silva AF, Andrade GP, Pedron CN, Cerchiaro G, Ribeiro AO, Oliveira VX, de la Fuente‐Nunez C. The wasp venom antimicrobial peptide polybia-CP and its synthetic derivatives display antiplasmodial and anticancer properties. Bioeng Transl Med 2020; 5:e10167. [PMID: 33005737 PMCID: PMC7510464 DOI: 10.1002/btm2.10167] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 03/23/2020] [Revised: 05/10/2020] [Accepted: 05/11/2020] [Indexed: 12/11/2022] Open
Abstract
The wasp venom-derived antimicrobial peptide polybia-CP has been previously shown to exhibit potent antimicrobial activity, but it is also highly toxic. Previously, using a physicochemical-guided peptide design strategy, we reversed its toxicity while preserving and even enhancing its antibacterial properties. Here, we report on several additional unanticipated biological properties of polybia-CP and derivatives, namely their ability to target Plasmodium sporozoites and cancer cells. We leverage a physicochemical-guided approach to identify features that operate as functional hotspots making these peptides viable antiplasmodial and anticancer agents. Helical content and net positive charge are identified as key structural and physicochemical determinants for antiplasmodial activity. In addition to helicity and net charge, hydrophobicity-related properties of polybia-CP and derivatives were found to be equally critical to target cancer cells. We demonstrate that by tuning these physicochemical parameters, it is possible to design synthetic peptides with enhanced submicromolar antiplasmodial potency and micromolar anticancer activity. This study reveals novel and previously undescribed functions for Polybia-CP and analogs. Additionally, we demonstrate that a physicochemical-guided rational design strategy can be used for identifying functional hotspots in peptide molecules and for tuning structure-function to generate novel and potent new-to-nature therapies.
Collapse
Affiliation(s)
- Marcelo D. T. Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, Penn Institute for Computational Science, and Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - Adriana F. Silva
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
- Departamento de BioquímicaUniversidade Federal de São PauloSão PauloSPBrazil
| | - Gislaine P. Andrade
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
| | - Cibele N. Pedron
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
| | - Giselle Cerchiaro
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
| | - Anderson O. Ribeiro
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
| | - Vani X. Oliveira
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABCSanto AndréSPBrazil
- Departamento de BiofísicaUniversidade Federal de São PauloSão PauloSPBrazil
| | - Cesar de la Fuente‐Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, Penn Institute for Computational Science, and Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| |
Collapse
|
7
|
Medeiros-Ventura WRL, Rabello CBV, Barros MR, Silva Junior RV, Oliveira HB, Faria AG, Silva AF, Soares PC, Pereira CG, Santos MJB, Fireman AK. Zinc, manganese, and copper amino acid complexes improve performance and bone characteristics of layer-type chicks under thermoneutral and cold stress conditions. Poult Sci 2020; 99:5718-5727. [PMID: 33142489 PMCID: PMC7647727 DOI: 10.1016/j.psj.2020.07.022] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 07/10/2020] [Accepted: 07/23/2020] [Indexed: 11/30/2022] Open
Abstract
Two experiments were designed to evaluate the effect of mineral-amino acid complexes (AACM) as a partial replacement of inorganic mineral (IM) in layer-type chicks' diets. Both studies had the same dietary treatments, where in experiment 1 (Exp. 1) was conducted under thermoneutral conditions from 0 to 35 D and chicks in experiment 2 (Exp. 2) were exposed to cold stress conditions at nighttime during the first 15 D and to thermoneutral condition from 16 to 35 D. For each trial, 1,200 one-day-old Lohmann Brown chicks were used, with 20 cage replicates with 30 chicks per cage. Treatments consisted of the control diet (IM; with 70, 70, and 8 mg/kg of zinc [Zn], manganese [Mn], and copper [Cu], respectively) and the treatment diet (AACM, with 40, 40, and 2.75 mg/kg of Zn, Mn, and Cu, respectively, from IM sources, along with 30, 30, and 5.25 mg/kg of Zn, Mn, and Cu, respectively). Data were submitted to analysis of variance, and means were compared using the t-test (P < 0.05). In Exp. 1, there were no significant differences between treatments on chick performance. However, AACM-fed chicks had higher thymus (P = 0.03) and cecum weight (P < 0.01), superior micromineral deposition in the tibias (P < 0.01), and reduced phosphorus excretion (P = 0.03). In Exp. 2, chicks fed with AACM had higher body weight gain (P = 0.04), better average daily feed intake (P = 0.03), lower phosphorus excretion (P = 0.02), and higher liver and pancreas weight (P < 0.01) in the last week of the study. In conclusion, chicks fed with AACM under thermoneutral conditions had higher bone mineralization and reduced excretion of phosphorus, and in adverse conditions, AACM improves performance and liver and pancreas weight, also reducing phosphorus excretion.
Collapse
Affiliation(s)
- W R L Medeiros-Ventura
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - C B V Rabello
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - M R Barros
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - R V Silva Junior
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - H B Oliveira
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - A G Faria
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - A F Silva
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - P C Soares
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - C G Pereira
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil
| | - M J B Santos
- Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros CEP: 52171-900 Recife, PE, Brazil.
| | - A K Fireman
- Zinpro Corporation, Eden Prairie, MN, USA 55344
| |
Collapse
|
8
|
Rufino JPF, Cruz FGG, Costa VR, Silva AF, Melo LD, Bezerra NS. Effect of In Ovo Feeding of L-Glutamine to Chick Embryos. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | - VR Costa
- Federal University of Amazonas, Brazil
| | - AF Silva
- Federal University of Amazonas, Brazil
| | - LD Melo
- Federal University of Amazonas, Brazil
| | | |
Collapse
|
9
|
Costa VR, Cruz FGG, Rufino JPF, Silva AF, Freitas BKM, Feijó JC, Guimarães CC. Available Phosphorus Levels in Diets for Muscovy Ducks in Housing. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- VR Costa
- Federal University of Amazonas, Brazil
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | | | - AF Silva
- Federal University of Amazonas, Brazil
| | | | - JC Feijó
- Federal University of Amazonas, Brazil
| | | |
Collapse
|
10
|
Guimarães CC, Silva AJI, Cruz FGG, Rufino JPF, Silva AF, Costa VR. Digestibility and Physicochemical Characteristics of Tambaqui Waste Biological Silage Meal Included in Commercial Layer Diets*. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - AJI Silva
- Federal University of Amazonas, Brazil
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | | | - AF Silva
- Federal University of Amazonas, Brazil
| | - VR Costa
- Federal University of Amazonas, Brazil
| |
Collapse
|
11
|
Affiliation(s)
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | | | - AF Silva
- Federal University of Amazonas, Brazil
| | | | - VR Costa
- Federal University of Amazonas, Brazil
| | | |
Collapse
|
12
|
Vieira JN, Gonçalves CL, Villarreal JPV, Gonçalves VM, Lund RG, Freitag RA, Silva AF, Nascente PS. Chemical composition of essential oils from the apiaceae family, cytotoxicity, and their antifungal activity in vitro against candida species from oral cavity. BRAZ J BIOL 2018; 79:432-437. [PMID: 30328892 DOI: 10.1590/1519-6984.182206] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 01/27/2018] [Indexed: 11/21/2022] Open
Abstract
The aims of this research were: evaluate the chemical composition and the cytotoxicity of the Cuminum cyminum (cumin), Anethum graveolens (dill), Pimpinella anisum (anise) and Foeniculum vulgare (fennel) essential oils, as well as their antifungal activity in vitro against ten Candida spp. isolates. The chemical composition of the oils was analyzed by means of gas chromatography coupled with mass spectrometry (GC/MS). The cytotoxicity assays were performed, using the cell proliferation reagent WST-1 in L929 mouse fibroblasts (20x103 well-1). The determinate the Minimum Inhibitory Concentration (MIC), was performed through the Broth Microdilution technique (CLSI). The chemical main components were the cuminaldehyde (32.66%) for cumin, carvone (34.89%) for the dill, trans-anethole (94.01%) for the anise and anethole (79.62%) for the fennel. Anise and fennel did not were cytotoxic in all the tested concentrations, however the cumin oil was cytotoxic in the concentration of 20 mg.mL-1 and the dill in the concentrations of 20 and 8 mg.mL-1. All yeasts were susceptible against the evaluated essential oils. Cumin presented the lowest MIC against yeasts. We concluded that all the essential oils presented inhibitory action against Candida spp., and C . cyminum, P. anisum and F. vulgare were not cytotoxic in the same minimum inhibitory concentrations for the fungi.
Collapse
Affiliation(s)
- J N Vieira
- Laboratório de Parasitologia, Departamento de Microbiologia e Parasitologia, Institute de Biologia, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| | - C L Gonçalves
- Laboratório de Parasitologia, Departamento de Microbiologia e Parasitologia, Institute de Biologia, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| | - J P V Villarreal
- Laboratório de Parasitologia, Departamento de Microbiologia e Parasitologia, Institute de Biologia, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| | - V M Gonçalves
- Departamento de Química Orgânica, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| | - R G Lund
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Pelotas - UFPel, Ruas Chaves, 457, Centro, CEP 96020-080, Pelotas, RS, Brasil
| | - R A Freitag
- Departamento de Química Orgânica, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| | - A F Silva
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Pelotas - UFPel, Ruas Chaves, 457, Centro, CEP 96020-080, Pelotas, RS, Brasil
| | - P S Nascente
- Laboratório de Parasitologia, Departamento de Microbiologia e Parasitologia, Institute de Biologia, Universidade Federal de Pelotas - UFPel, s/n, Capão do Leão, CEP 96010-900, Pelotas, RS, Brasil
| |
Collapse
|
13
|
Abstract
Optogenetics is a relatively new technology to achieve cell-type specific neuromodulation with millisecond-scale temporal precision. Optogenetic tools are being developed to address neuroscience challenges, and to improve the knowledge about brain networks, with the ultimate aim of catalyzing new treatments for brain disorders and diseases. To reach this ambitious goal the implementation of mature and reliable engineered tools is required. The success of optogenetics relies on optical tools that can deliver light into the neural tissue. Objective/Approach: Here, the design and manufacturing approaches available to the scientific community are reviewed, and current challenges to accomplish appropriate scalable, multimodal and wireless optical devices are discussed. SIGNIFICANCE Overall, this review aims at presenting a helpful guidance to the engineering and design of optical microsystems for optogenetic applications.
Collapse
Affiliation(s)
- S B Goncalves
- CMEMS-UMinho, Department of Industrial Electronics, University of Minho, Guimaraes, Portugal
| | | | | | | | | |
Collapse
|
14
|
Torres MDT, Silva AF, Pedron CN, Capurro ML, de la Fuente‐Nunez C, Junior VXO. Peptide Design Enables Reengineering of an Inactive Wasp Venom Peptide into Synthetic Antiplasmodial Agents. ChemistrySelect 2018. [DOI: 10.1002/slct.201800529] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Marcelo D. T. Torres
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABC
- Synthetic Biology Group
- Research Laboratory of Electronics
- Department of Biological Engineering and Department of Electrical Engineering and Computer ScienceMassachusetts Institute of TechnologyCambridge, MassachusettsUnited States of America
- Broad Institute of MIT and Harvard, Cambridge, MassachusettsUnited States of America
| | - Adriana F. Silva
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABC
| | - Cibele N. Pedron
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABC
| | | | - Cesar de la Fuente‐Nunez
- Synthetic Biology Group
- Research Laboratory of Electronics
- Department of Biological Engineering and Department of Electrical Engineering and Computer ScienceMassachusetts Institute of TechnologyCambridge, MassachusettsUnited States of America
- Broad Institute of MIT and Harvard, Cambridge, MassachusettsUnited States of America
- The Center for Microbiome Informatics and Therapeutics, Cambridge, Massachusetts, United States of America
| | | |
Collapse
|
15
|
Batalha OS, Alfaia SS, Cruz FGG, Jesus RS, Rufino JPF, Silva AF. Pirarucu By-Product Acid Silage Meal in Diets for Commercial Laying Hens. Braz J Poult Sci 2018. [DOI: 10.1590/1806-9061-2017-0518] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- OS Batalha
- National Institute of Amazonian Researches, Brazil
| | - SS Alfaia
- National Institute of Amazonian Researches, Brazil
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | - RS Jesus
- National Institute of Amazonian Researches, Brazil
| | | | - AF Silva
- Federal University of Amazonas, Brazil
| |
Collapse
|
16
|
Tavares RS, Escada-Rebelo S, Silva AF, Sousa MI, Ramalho-Santos J, Amaral S. Antidiabetic therapies and male reproductive function: where do we stand? Reproduction 2018; 155:R13-R37. [DOI: 10.1530/rep-17-0390] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/15/2017] [Accepted: 10/09/2017] [Indexed: 12/21/2022]
Abstract
Diabetes mellitus has been increasing at alarming rates in recent years, thus jeopardizing human health worldwide. Several antidiabetic drugs have been introduced in the market to manage glycemic levels, and proven effective in avoiding, minimizing or preventing the appearance or development of diabetes mellitus-related complications. However, and despite the established association between such pathology and male reproductive dysfunction, the influence of these therapeutic interventions on such topics have been scarcely explored. Importantly, this pathology may contribute toward the global decline in male fertility, giving the increasing preponderance of diabetes mellitus in young men at their reproductive age. Therefore, it is mandatory that the reproductive health of diabetic individuals is maintained during the antidiabetic treatment. With this in mind, we have gathered the available information and made a critical analysis regarding the effects of several antidiabetic drugs on male reproductive function. Unlike insulin, which has a clear and fundamental role on male reproductive function, the other antidiabetic therapies' effects at this level seem incoherent. In fact, studies are highly controversial possibly due to the different experimental study approaches, which, in our opinion, suggests caution when it comes to prescribing such drugs to young diabetic patients. Overall, much is still to be determined and further studies are needed to clarify the safety of these antidiabetic strategies on male reproductive system. Aspects such as the effects of insulin levels variations, consequent of insulin therapy, as well as what will be the impact of the side effect hypoglycemia, common to several therapeutic strategies discussed, on the male reproductive system are still to be addressed.
Collapse
|
17
|
Silva AF, Oliveira VX, Silva LS, Pinheiro AA, Ciscato LF. Antiplasmodial activity of alkyl-substituted 1,2-dioxetanes against Plasmodium falciparum. Bioorg Med Chem Lett 2016; 26:5007-5008. [DOI: 10.1016/j.bmcl.2016.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 08/29/2016] [Accepted: 08/31/2016] [Indexed: 10/21/2022]
|
18
|
Abstract
Emerging understanding about interactions between stem cells, scaffolds, and morphogenic factors has accelerated translational research in the field of dental pulp tissue engineering. Dental pulp stem cells constitute a subpopulation of cells endowed with self-renewal and multipotency. Dental pulp stem cells seeded in biodegradable scaffolds and exposed to dentin-derived morphogenic factors give rise to a pulplike tissue capable of generating new dentin. Notably, dentin-derived proteins are sufficient to induce dental pulp stem cell differentiation into odontoblasts. Ongoing work is focused on developing ways of mobilizing dentin-derived proteins and disinfecting the root canal of necrotic teeth without compromising the morphogenic potential of these signaling molecules. On the other hand, dentin by itself does not appear to be capable of inducing endothelial differentiation of dental pulp stem cells despite the well-known presence of angiogenic factors in dentin. This is particularly relevant in the context of dental pulp tissue engineering in full root canals in which access to blood supply is limited to the apical foramina. To address this challenge, scientists are looking at ways to use the scaffold as a controlled-release device for angiogenic factors. The aim of this article was to present and discuss current strategies to functionalize injectable scaffolds and customize them for dental pulp tissue engineering. The long-term goal of this work is to develop stem cell-based therapies that enable the engineering of functional dental pulps capable of generating new tubular dentin in humans.
Collapse
Affiliation(s)
- Evandro Piva
- Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil; Department of Cariology, Restorative Sciences, Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan
| | - Adriana F Silva
- Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil; Department of Cariology, Restorative Sciences, Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan
| | - Jacques E Nör
- Department of Cariology, Restorative Sciences, Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan; Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, Michigan; Department of Otolaryngology, University of Michigan School of Medicine, Ann Arbor, Michigan.
| |
Collapse
|
19
|
Lopes LC, Silva AF, Cruz ITSA, Fraiz FC, Assunção LRS. Oral Findings in Brazilian Infants Born at Full Term. Pesqui bras odontopediatria clín integr 2016. [DOI: 10.4034/pboci.2016.161.30] [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
|
20
|
Lopes NS, Yoshitake AM, Silva AF, Oliveira VX, Silva LS, Pinheiro AAS, Ciscato LFML. Antimalarial Effect of 3-Methoxy-1,2-Dioxetanes on the Erythrocytic Cycle of Plasmodium falciparum. Chem Biol Drug Des 2015; 86:1373-7. [PMID: 26032859 DOI: 10.1111/cbdd.12599] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 04/28/2015] [Revised: 05/19/2015] [Accepted: 05/27/2015] [Indexed: 12/19/2022]
Abstract
The antimalarial activity of peroxides most likely originates from their interaction with iron(II) species located inside the malaria parasite, which forms destructive radical species through a Fenton-like mechanism. This article reports the first evaluation of the in vitro antimalarial activity of three peroxides of the class 1,2-dioxetanes against Plasmodium falciparum; the results reveal that the studied 3-methoxy-1,2-dioxetanes display significant antimalarial activity, at a similar level as artemisinin and also that their reactivity toward iron(II) correlate linearly with their antimalarial activity.
Collapse
Affiliation(s)
- Nicolas S Lopes
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001, Santo André, SP, 09210-580, Brazil
| | - Ariane M Yoshitake
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001, Santo André, SP, 09210-580, Brazil
| | - Adriana F Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001, Santo André, SP, 09210-580, Brazil
| | - Vani X Oliveira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001, Santo André, SP, 09210-580, Brazil
| | - Leandro S Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, RJ 21944-970, Brazil
| | - Ana A S Pinheiro
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, RJ 21944-970, Brazil
| | - Luiz Francisco M L Ciscato
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001, Santo André, SP, 09210-580, Brazil
| |
Collapse
|
21
|
Goncalves N, Correia E, Silva AF, Moura CM, Roncon Albuquerque R, Falcao Pires I, Leite Moreira AF. P81Changes on right ventricle induced by a high caloric diet and a left ventricle model of pressure overload. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu082.24] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Marcelo Der Torossian T, Silva AF, Alves FL, Capurro ML, Miranda A, Vani Xavier O. Highly Potential Antiplasmodial Restricted Peptides. Chem Biol Drug Des 2014; 85:163-71. [DOI: 10.1111/cbdd.12354] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 04/01/2014] [Accepted: 04/29/2014] [Indexed: 12/17/2022]
Affiliation(s)
| | - Adriana F. Silva
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André Brazil
| | - Flávio L. Alves
- Departamento de Biofísica; Universidade Federal de São Paulo; São Paulo Brazil
| | - Margareth L. Capurro
- Instituto de Ciências Biomédicas II; Universidade de São Paulo; São Paulo Brazil
| | - Antonio Miranda
- Departamento de Biofísica; Universidade Federal de São Paulo; São Paulo Brazil
| | - Oliveira Vani Xavier
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André Brazil
| |
Collapse
|
23
|
Tavares RS, Silva AF, Lourenço B, Almeida-Santos T, Sousa AP, Ramalho-Santos J. Evaluation of human sperm chromatin status after selection using a modified Diff-Quik stain indicates embryo quality and pregnancy outcomes following in vitro fertilization. Andrology 2013; 1:830-7. [PMID: 24124136 DOI: 10.1111/j.2047-2927.2013.00127.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 04/11/2013] [Revised: 07/08/2013] [Accepted: 07/30/2013] [Indexed: 11/29/2022]
Abstract
Sperm chromatin/DNA damage can be measured by a variety of assays. However, it has been reported that these tests may lose prognostic value in Assisted Reproductive Technology (ART) cycles when assessed in post-prepared samples, possibly due to the normalizing effect promoted by sperm preparation procedures. We have recently implemented a modified version of the Diff-Quik staining assay that allows for the evaluation of human sperm chromatin status in native samples, together with standard sperm morphology assessment. However, the value of this parameter in terms of predicting in vitro fertilization (IVF) and Intracytoplasmic sperm injection (ICSI) outcomes after sperm selection is unknown. In this study, data from 138 couples undergoing in vitro fertilization (IVF) or Intracytoplasmic sperm injection (ICSI) treatments showed that sperm chromatin integrity was significantly improved after density gradient centrifugation and swim up (p < 0.001), but no correlations were found with fertilization or embryo development rates (p > 0.05). However, sperm samples presenting lower percentages of damaged chromatin were associated with better quality (Grade I) embryos in both ART procedures (p < 0.05) and clinical pregnancy among IVF couples (p < 0.05). Furthermore, regression analysis confirmed the clinical value of Diff-Quik staining in predicting IVF (but not ICSI) clinical pregnancy (OR: 0.927, 95% CI: 0.871-0.985, p = 0.015), and a threshold value of 34.25% for this parameter was established. The proportion of IVF couples achieving a clinical pregnancy was reduced 1.9-fold when the percentage of abnormal dark staining was ≥34.25% (p = 0.05). In conclusion, the Diff-Quik staining assay provides useful information regarding ART success, particularly in IVF cycles, where some degree of 'natural' sperm selection may occur; but not in ICSI, where sperm selection is operator dependent. This quick and low-cost assay is suggested as an alternative method to detect sperm chromatin status in minimal clinical settings, when no other well-established and robust assays (e.g. Sperm chromatin structure assay, terminal deoxynucleotidyl transferase-mediated dUDP nick-end labelling) are available.
Collapse
Affiliation(s)
- R S Tavares
- Biology of Reproduction and Stem Cell Group, CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | | | | | | | | | | |
Collapse
|
24
|
Chamlian M, Bastos EL, Maciel C, Capurro ML, Miranda A, Silva AF, Torres MDT, Oliveira VX. A study of the anti-plasmodium activity of angiotensin II analogs. J Pept Sci 2013; 19:575-80. [DOI: 10.1002/psc.2534] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 06/06/2013] [Accepted: 06/10/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Mayra Chamlian
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
| | - Erick L. Bastos
- Departamento de Química Fundamental; Universidade de São Paulo, Instituto de Química; São Paulo SP Brazil
| | - Ceres Maciel
- Instituto de Ciências Biomédicas; Universidade de São Paulo; São Paulo SP Brazil
| | - Margareth L. Capurro
- Instituto de Ciências Biomédicas; Universidade de São Paulo; São Paulo SP Brazil
| | - Antonio Miranda
- Departamento de Biofísica; Universidade Federal de São Paulo; São Paulo SP Brazil
| | - Adriana F. Silva
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
| | - Marcelo Der T. Torres
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
| | - Vani X. Oliveira
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
| |
Collapse
|
25
|
Oliveira VX, Fázio MA, Silva AF, Campana PT, Pesquero JB, Santos EL, Costa-Neto CM, Miranda A. Biological and conformational evaluation of angiotensin II lactam bridge containing analogues. ACTA ACUST UNITED AC 2011; 172:1-7. [PMID: 21787808 DOI: 10.1016/j.regpep.2011.05.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Revised: 03/28/2011] [Accepted: 05/30/2011] [Indexed: 11/25/2022]
Abstract
Angiotensin II (AII) is the active octapeptide product of the renin enzymatic cascade, which is responsible for sustaining blood pressure. In an attempt to establish the AII-receptor-bound conformation of this octapeptide, we designed conformationally constrained analogues by scanning the entire AII sequence with an i-(i+2) and i-(i+3) lactam bridge consisting of an Asp-(Xaa)(n)-Lys scaffold. Most analogues presented low agonistic activity when compared to AII in the different bioassays tested. The exceptions are cyclo(0-1a) [Asp(0), endo-(Lys(1a))]-AII (1) and [Asp(0), endo-(Lys(1a))]-AII (2), both of which showed activity similar to AII. Based on peptide 1 and the analogue cyclo(3-5)[Sar(1), Asp(3), Lys(5)]-AII characterized by Matsoukas et al., we analyzed the agonistic and antagonistic activities, respectively, through a new monocyclic peptide series synthesized by using the following combinations of residues as bridgehead elements for the lactam bond formation: D- or L-Asp combined with D- or L-Lys or L-Glu combined with L-Orn. Six analogues showed an approximately 20% increase in biological activity when compared with peptide (1) and were equipotent to AII. In contrast, six analogues presented antagonistic activity. These results suggest that the position of the lactam bridge is more important than the bridge length or chirality for recognition of and binding to the angiotensin II AT1-receptor.
Collapse
Affiliation(s)
- Vani X Oliveira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP 09210-170, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Leites AB, Baldissera EZ, Silva AF, Tarquinio S, Botero T, Piva E, Demarco FF. Histologic Response and Tenascin and Fibronectin Expression After Pulp Capping in Pig Primary Teeth With Mineral Trioxide Aggregate or Calcium Hydroxide. Oper Dent 2011; 36:448-56. [DOI: 10.2341/10-321-l] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
Mineral trioxide aggregate produces a lower initial inflammatory response than calcium hydroxide. However, both capping materials produce dentin barriers after seventy days.
Collapse
|
27
|
Rocha RP, Silva AF, Carmo JP, Correia JH. FBG in PVC foils for monitoring the knee joint movement during the rehabilitation process. Annu Int Conf IEEE Eng Med Biol Soc 2011; 2011:458-461. [PMID: 22254347 DOI: 10.1109/iembs.2011.6090064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper presents a sensing electronic-free wearable solution for monitoring the body kinematics. The measuring of the knee movements, flexion and extension, with the corresponding joint acting as the rotation axis is shown as working principle. The proposed sensing system is based on a single optical Fiber-Bragg Grating (FBG) with a resonance wavelength of 1547.76 nm. The optical fiber with the FBG is placed inside a new polymeric foil composed by three flexible layers which facilitates its placement in the anatomic parts under investigation while maintaining full sensing capabilities. The way the device is placed in the specific body part to be measured enables the clear detection of the movements in respect to the joint. The proposed solution was tested using a prototype that was built to evaluate the device under different condition tests and also to assess the system's consistency. The designed and fabricated system demonstrates clear advantages in medical fields like physical therapy applications as optical fiber is not affected by electromagnetic interference nor does the system needs complex and expensive electronic systems and mechanical parts. Another advantage is the possibility to measure, record and evaluate specific mechanical parameters of the limbs' motion. Patients with bone, muscular and joint related health conditions, as well as athletes, are within the most important end-user applications.
Collapse
Affiliation(s)
- R P Rocha
- Dept Industrial Electronics, University of Minho, 4800-058 Guimarães, Portugal.
| | | | | | | |
Collapse
|
28
|
Carvalho RV, Ogliari FA, de Souza AP, Silva AF, Petzhold CL, Line SRP, Piva E, Etges A. 2-hydroxyethyl methacrylate as an inhibitor of matrix metalloproteinase-2. Eur J Oral Sci 2009; 117:64-7. [PMID: 19196320 DOI: 10.1111/j.1600-0722.2008.00591.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study evaluated the effect of different concentrations of 2-hydroxyethyl methacrylate (HEMA) on the inhibition of matrix metalloproteinase-2 (MMP-2) in vitro. Mouse gingival explants were cultured overnight in Dulbecco's modified Eagle's minimal essential medium, following which the expression of secreted enzymes was analyzed by gelatin zymography and the effects of different amounts of HEMA on enzyme activity were investigated. The gelatinolytic proteinases present in the conditioned media were characterized as being matrix metalloproteinases (MMPs) by means of specific chemical inhibition. The MMPs present in the conditioned media were identified, using immunoprecipitation, as MMP-2. Three major bands were detected in the zymographic assays and were characterized, according to their respective molecular weights, into the following forms of MMP-2: zymogene (72 kDa), intermediate (66 kDa), and active (62 kDa). All forms of MMP-2 were inhibited by HEMA in a dose-dependent manner, implying that MMP-2 may be inhibited by HEMA in vivo.
Collapse
Affiliation(s)
- Rodrigo V Carvalho
- Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, Rio Grande do Sul, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
Collared peccary (Tayassu tajacu) belongs to the Tayassuidae family that is characterized by a dorsal scent gland located in the middle of the hump. It can be found from south-west United States to Argentina. It is a very well-adapted animal that can survive different environments, having a varied diet. Very little morphological information of the animal is available, except that concerning the reproductive tract. This study describes the histological organization of the collared peccary lip. The lip marks the junction between the integument and digestive system. It is lined by skin on the outer surface and mucosa on the inner surface. Skin appendages such as hair follicles and glands are usually found on the outer surface. The collared peccary's lip shows, on the outer surface, simple and sinus hair follicles as well as sebaceous and apocrine sweat glands. No salivary gland is found on the inner surface, and deep in the connective tissue pacinian corpuscles can be found. The connective tissue is rich in collagen and elastic fibres. The collared peccary's lip may be used not only for food prehension but also functions as a sensitive structure giving tactile input to the central nervous system.
Collapse
Affiliation(s)
- T S Teófilo
- Department of Animal Sciences, Veterinary Medicine College, UFERSA, Mossoró-RN 59625-900, Brazil
| | | | | |
Collapse
|
30
|
Piva E, Tarquínio SBC, Demarco FF, Silva AF, de Araújo VC. Immunohistochemical expression of fibronectin and tenascin after direct pulp capping with calcium hydroxide. ACTA ACUST UNITED AC 2006; 102:e66-71. [PMID: 16997097 DOI: 10.1016/j.tripleo.2006.01.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2005] [Revised: 01/18/2006] [Accepted: 01/19/2006] [Indexed: 11/22/2022]
Abstract
The aim of this study was to investigate the expression of 2 extracellullar matrix glycoproteins, fibronectin (FNC) and tenascin (TNC), following direct pulp capping with calcium hydroxide (CH). Third molars scheduled for extraction were used. Standardized class I cavities with pulp exposures were prepared. After control of bleeding, CH powder was applied in the exposure sites, which were covered with CH cement (Dycal; Dentsply) and the cavities were filled with zinc oxide-eugenol cement. Three teeth were extracted at each post-treatment period (1, 7, 14, and 30 days). Demineralized and paraffin-embedded specimens were stained for histologic technique (hematoxylin-eosin) and for immunohistochemical analysis. Anti-TNC and anti-FNC monoclonal antibodies were used with the streptavidin-biotin complex method. Generally, similar patterns of immunohistochemical expression were observed for TNC and FNC in the pulp tissue as a whole. In the exposure site, TNC immunostaining increased over time, exhibiting a thicker immunostaining pattern within 30 days. The imunohistochemical technique showed expression of both glycoproteins during pulp healing process.
Collapse
Affiliation(s)
- Evandro Piva
- Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
| | | | | | | | | |
Collapse
|
31
|
Silva AF, Tarquinio SBC, Demarco FF, Piva E, Rivero ERC. The influence of haemostatic agents on healing of healthy human dental pulp tissue capped with calcium hydroxide. Int Endod J 2006; 39:309-16. [PMID: 16584494 DOI: 10.1111/j.1365-2591.2006.01101.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AIM To investigate the hypothesis that different haemostatic agents could impair the histological response of human pulps capped with calcium hydroxide. METHODOLOGY Forty-five third molars scheduled for extraction were selected. Class I cavities with pulp exposures were prepared. Three agents were used to control bleeding: 0.9% saline solution (control, n = 14), 5.25% sodium hypochlorite (n = 16) and 2% chlorhexidine digluconate (n = 15). The pulps were dressed with hard-setting calcium hydroxide cement. After 7, 30 or 90 days, teeth were extracted, formalin-fixed and prepared for histochemical techniques. The biological response was categorized using the following criteria: inflammatory response, soft tissue organization, reactionary dentine and reparative dentine. Data were submitted to statistical analysis, using nonparametric Kruskal-Wallis one-way analysis of variance on ranks. Differences amongst groups were detected using Dunn's method. RESULTS The statistical analysis disclosed that whilst inflammatory response decreased over time, reactionary dentine deposition and reparative dentine formation increased in the latter periods of evaluation (P < 0.05). The three agents had similar performances for all criteria evaluated. The conventional pulp response to calcium hydroxide was observed over time, and complete pulp healing was observed in 88% of the specimens after 90 days. CONCLUSION The three haemostatic agents did not impair the healing process following pulp exposure and capping with calcium hydroxide at different time intervals investigated.
Collapse
Affiliation(s)
- A F Silva
- Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | | | | | | | | |
Collapse
|
32
|
Souza ALS, Roffê E, Pinho V, Souza DG, Silva AF, Russo RC, Guabiraba R, Pereira CAJ, Carvalho FM, Barsante MM, Correa-Oliveira R, Fraga LAO, Negrão-Correa D, Teixeira MM. Potential role of the chemokine macrophage inflammatory protein 1alpha in human and experimental schistosomiasis. Infect Immun 2005; 73:2515-23. [PMID: 15784598 PMCID: PMC1087406 DOI: 10.1128/iai.73.4.2515-2523.2005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In human schistosomiasis, the concentrations of the chemokine macrophage inflammatory protein 1alpha (MIP-1alpha/CCL3) is greater in the plasma of patients with clinical hepatosplenic disease. The objective of the present study was to confirm the ability of CCL3 to detect severe disease in patients classified by ultrasonography (US) and to evaluate the potential role of CCL3 in Schistosoma mansoni-infected mice. CCL3 was measured by enzyme-linked immunosorbent assay in the plasma of S. mansoni-infected patients. CCL3-deficient mice were infected with 25 cercariae, and various inflammatory and infectious indices were evaluated. The concentration of CCL3 was higher in the plasma of S. mansoni-infected than noninfected patients. Moreover, CCL3 was greater in those with US-defined hepatosplenic than with the intestinal form of the disease. In CCL3-deficient mice, the size of the granuloma and the liver eosinophil peroxidase activity and collagen content were diminished compared to wild-type mice. In CCL3-deficient mice, the worm burden after 14 weeks of infection, but not after 9 weeks, was consistently smaller. The in vitro response of mesenteric lymph node cells to antigen stimulation was characterized by lower levels of interleukin-4 (IL-4) and IL-10. CCL3 is a marker of disease severity in infected humans, and experimental studies in mice suggest that CCL3 may be a causative factor in the development of severe schistosomiasis.
Collapse
Affiliation(s)
- Adriano L S Souza
- Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Galvão CM, Silva AF, Custódio MF, Monti R, Giordano RL. Controlled hydrolysis of cheese whey proteins using trypsin and alpha-chymotrypsin. Appl Biochem Biotechnol 2002; 91-93:761-76. [PMID: 11963904 DOI: 10.1385/abab:91-93:1-9:761] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 11/11/2022]
Abstract
This study examined the production of protein hydrolysates with controlled composition from cheese whey proteins. Cheese whey was characterized and several hydrolysis experiments were made using whey proteins and purified beta-lactoglobulin, as substrates, and trypsin and alpha-chymotrypsin, as catalysts, at two temperatures and several enzyme concentrations. Maximum degrees of hydrolysis obtained experimentally were compared to the theoretical values and peptide compositions were calculated. For trypsin, 100% of yield was achieved; for alpha-chymotrypsin, hydrolysis seemed to be dependent on the oligopeptide size. The results showed that the two proteases could hydrolyze beta-lactoglobulin. Trypsin and alpha-chymotrypsin were stable at 40 degrees C, but a sharp decrease in the protease activity was observed at 55 degrees C.
Collapse
Affiliation(s)
- C M Galvão
- Departamento de Engenharia Química, Universidade Federal de São Carlos, SP, Brazil
| | | | | | | | | |
Collapse
|
34
|
Lee HJ, Pereira CM, Silva AF, Girault HH. Pulse amperometric detection of salt concentrations by flow injection analysis using ionodes. Anal Chem 2000; 72:5562-6. [PMID: 11101232 DOI: 10.1021/ac0006831] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A sensitive novel approach of using an amperometric ion detector for the flow injection analysis of salts has been developed. The detection methodology is based on measuring the current associated with the transfer of ions across polarized microinterfaces between the aqueous sample solution and a 2-nitrophenyloctyl ether-poly(vinyl chloride) gel phase, referred to as ionodes. Different sodium salts of fluoride, chloride, bromide, nitrate, and sulfate were investigated. It was found that by employing an amperometric pulse detection mode and pure water as eluent, the detection limit of the ionode detector could be lowered to ppt level of salt concentrations under flowing conditions.
Collapse
Affiliation(s)
- H J Lee
- Laboratoire d'Electrochimie, Ecole Polytechnique Fédérale de Lausanne, Switzerland
| | | | | | | |
Collapse
|
35
|
Pinotti LM, Silva AF, Silva RG, Giordano RL. Study of different media for production of penicillin G acylase from Bacillus megaterium ATCC 14945. Appl Biochem Biotechnol 2000; 84-86:655-63. [PMID: 10849825 DOI: 10.1385/abab:84-86:1-9:655] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this study, several fermentation media were tested for the production of penicillin G acylase (PGA) using Bacillus megaterium. The carbon sources studied were glucose and lactose. The nitrogen sources studied were enzymatic casein hydrolysates produced with proteases of different specificities. The replacement of glucose with cheese whey and the addition of free amino acids in the PGA production were also tested. The results showed a strong correlation between the nitrogen source and enzyme yield and the presence of glucose repression. The highest enzyme concentration achieved was 138 IU/L using casein hydrolyzed with 0.6 L of Alcalase and cheese whey.
Collapse
Affiliation(s)
- L M Pinotti
- Departamento de Engenharia Química, Universidade Federal de São Carlos, SP, Brazil
| | | | | | | |
Collapse
|
36
|
Abstract
In this study, we screened sixty medicinal plant species from the Brazilian savanna ("cerrado") that could contain useful compounds for the control of tropical diseases. The plant selection was based on existing ethnobotanic information and interviews with local healers. Plant extracts were screened for: (a) molluscicidal activity against Biomphalaria glabrata, (b) toxicity to brine shrimp (Artemia salina L.), (c) antifungal activity in the bioautographic assay with Cladosporium sphaerospermum and (d) antibacterial activity in the agar diffusion assay against Staphylococcus aureus, Escherichia coli, Bacillus cereus and Pseudomonas aeruginosa. Forty-two species afforded extracts that showed some degree of activity in one or more of these bioassays.
Collapse
Affiliation(s)
- T M Alves
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Instituto Oswaldo Cruz, Belo Horizonte, MG, 30190-002, Brasil
| | | | | | | | | | | | | |
Collapse
|
37
|
Abstract
Wernicke's encephalopathy may be fatal if untreated. Because Wernicke's encephalopathy is suspected to be underdiagnosed in children, the authors wished to assess the frequency of overlooked diagnosis and to establish pertinent findings that could lead to early identification of pediatric Wernicke's encephalopathy. The authors performed multiple literature searches seeking pediatric patients with Wernicke's encephalopathy (age = 20 years or younger). A total of 30 patients was found, and the authors added a new patient. Each case report had its clinical, radiologic, and laboratory data, diagnostic method, and outcome analyzed. Of 31 patients, 16 were female and 15 male; the median age +/- S.D. was 11 +/- 6.5 years. The most frequent underlying disorder was malignancy in 11. Thirteen patients died undiagnosed, 16 recovered with thiamine therapy (eight with sequelae), and two died of infection soon after thiamine replacement was initiated. Only six presented with the Wernicke's encephalopathy clinical triad (mental status changes, ocular signs, and ataxia) at neurologic onset; nine eventually demonstrated this triad. The high rate of patients diagnosed only at postmortem examination (41.9%) confirms that Wernicke's encephalopathy is underdiagnosed in children. Thiamine therapy is warranted if any component of the Wernicke's encephalopathy triad is present in an appropriate clinical setting.
Collapse
Affiliation(s)
- M M Vasconcelos
- Department of Pediatrics, Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Brazil
| | | | | | | | | | | |
Collapse
|
38
|
Marzochi KB, Marzochi MA, Silva AF, Grativol N, Duarte R, Confort EM, Modabber F. Phase 1 study of an inactivated vaccine against American tegumentary leishmaniasis in normal volunteers in Brazil. Mem Inst Oswaldo Cruz 1998; 93:205-12. [PMID: 9698895 DOI: 10.1590/s0074-02761998000200014] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
A Phase 1 double-blind placebo-controlled study was performed to evaluate a vaccine against American tegumentary leishmaniasis in 61 healthy male volunteers. Side effects and the immune response to the vaccine were evaluated, with 1- and 2- dose schemes, with intervals of 7 or 21 days, each dose containing 1440 mg of protein N antigen of a single strain of Leishmania amazonensis (PH8) diluted in merthiolated saline (1:10,000). Merthiolated saline and an inert substance were used as placebos. No significant clinical alterations were found following the respective injections in the vaccinated individuals as compared to the placebos, except for local pain, which was associated significantly with injection of the vaccine. The laboratory alterations we observed bore no association with the clinical findings and were unimportant. We observed no differences between the groups with regard to seroconversion of the Montenegro skin test. However, the group that received a single dose of the vaccine and the one that received two doses with a 21-day interval displayed cutaneous induration significantly larger than in the control group, with 100%, 100%, and 66% conversion in the skin test, respectively. We concluded that the vaccine does not present any major side effect that would contraindicate its use in healthy individuals.
Collapse
Affiliation(s)
- K B Marzochi
- Hospital Evandro Chagas, Instituo Oswaldo Cruz, Rio de Janerio, Brasil
| | | | | | | | | | | | | |
Collapse
|
39
|
Diniz JS, Silva JM, Silva AF, Junior MM, Heringer SB, Batista EN, Figueiredo CL. [Hypertension: retrospective study in children from a pediatric nephrology unit]. J Pediatr (Rio J) 1994; 70:226-33. [PMID: 14688861 DOI: 10.2223/jped.715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
300 hypertensive children, from newborn to 18 years old,were studied, retrospectively, from 1975 to 1992, 105 from those lost for follow-up. In 244 the diagnosis of the primary disease, predominantly glomerulopathy, was established. 122 had chronic renal failure (CRF). From them, 74 arrived at end stage renal disease (ESRD) and 13 have been transplanted. From 12 submitted to surgical treatment, hypertension has been controlled in 8. 54 died, 48 with CRF and 38 with ESRD. Difficulties in controlling those patients are discussed, mainly therapy diet, the use of hypotensive drugs on dialysis treatment. Our conclusion is for the necessity of a precocious diagnosis for hypertension and primary diseases, of a trained interprofessional team as well as availability of adequate equipment to children, mainly for dialytic therapy. For many of these children, renal transplantation is the only definite therapy.
Collapse
Affiliation(s)
- J S Diniz
- Unidade de Nefrologia Pediátrica-Hospital das Clínicas, Depaprtmento de Pediatria, Faculdade de Medicine da UFMG, Belo Horizinte, MG
| | | | | | | | | | | | | |
Collapse
|
40
|
Sakai P, Ishioka S, Silva AF, Pinotti HW, Raia A. [Mallory-Weiss syndrome in upper digestive hemorrhage. Study of 32 cases]. AMB Rev Assoc Med Bras 1980; 26:120-2. [PMID: 6968953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|