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Pereira TCR, Fidale TM, Guimarães LC, Deconte SR, Herrera GC, Mundim AV, de Sales Cabral E, Lopes PR, de Souza FR, de Ulhôa Rocha Júnior LD, Silva ATF, Resende ES. Cardioprotective Effects of the 4-Week Aerobic Running Exercises Before Treatment with Doxorubicin in Rats. Cardiovasc Toxicol 2023; 23:265-277. [PMID: 37402033 DOI: 10.1007/s12012-023-09798-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/22/2023] [Indexed: 07/05/2023]
Abstract
Doxorubicin is associated with cardiotoxicity, and physical exercise seeks to minimize the toxic effects of doxorubicin through physiological cardiac remodeling, as well as the reduction of oxidative stress, evidenced by previous studies. This study aimed to analyze whether running training before treatment with doxorubicin influences tolerance to physical exertion and cardiotoxicity. Thirty-nine male Wistar rats, aged 90 days and weighing between 250 and 300 g, were divided into 4 groups: Control (C), Doxorubicin (D), Trained (T), and Trained + Doxorubicin (TD). Animals in groups T and DT were submitted to treadmill running for 3 weeks, 5 times a week at 18 m/min for 20-30 min before treatment with doxorubicin. Animals in groups D and DT received intraperitoneal injections of doxorubicin hydrochloride three times a week for two weeks, reaching a total cumulative dose of 7.50 mg/kg. Our results show an increase in total collagen fibers in the D group (p = 0.01), but no increase in the TD group, in addition to the attenuation of the number of cardiac mast cells in the animals in the TD group (p = 0.05). The animals in the TD group showed maintenance of tolerance to exertion compared to group D. Therefore, running training attenuated the cardiac damage caused by the treatment with doxorubicin, in addition to maintaining the tolerance to exertion in the rats.
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Affiliation(s)
- Talita Cristina Rodrigues Pereira
- Experimental Medicine Laboratory, Department of Medicine, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil.
- , Uberlândia, Brazil.
| | - Thiago Montes Fidale
- Department of Medicine, Federal University of Catalão- UFCAT, Catalão-Goiás, Brazil
| | - Lucas Costa Guimarães
- Experimental Medicine Laboratory, Department of Medicine, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil
| | - Simone Ramos Deconte
- Department of Physiology, Institute of Biomedical Sciences, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil
| | | | | | - Eduardo de Sales Cabral
- Experimental Medicine Laboratory, Department of Medicine, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil
| | - Paulo Ricardo Lopes
- Department of Physiology and Pathology, School of Dentistry-FOAr, Paulista State University "Julio de Mesquita Filho"-UNESP, Araraquara, SP, Brazil
| | - Fernanda Rodrigues de Souza
- Experimental Medicine Laboratory, Department of Medicine, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil
| | | | - Alinne Tatiane Faria Silva
- Laboratory of Nanobiotechnology, Institute of Genetics and Biochemistry, Luiz Ricardo Goulart Filho, Universidade Federal de Uberlândia-UFU, Prof. Dr, Uberlândia, MG, Brazil
| | - Elmiro Santos Resende
- Graduate Program in Health Sciences-PPGCS, Faculty of Medicine, Universidade Federal de Uberlândia-UFU, Uberlândia, MG, Brazil
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Almeida GC, Guimarães LC, Resende PD, Buono VTL, Peixoto IFC, Viana ACD. Torsional behaviour of Reciproc and Reciproc blue instruments associated with their martensitic transformation temperatures. Int Endod J 2019; 52:1768-1772. [PMID: 31306497 DOI: 10.1111/iej.13185] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 07/09/2019] [Indexed: 11/26/2022]
Abstract
AIM To compare the martensitic transformation temperatures and torsional resistance behaviour of classic M-Wire Reciproc and Reciproc blue files (VDW, Munich, Germany). METHODOLOGY M-Wire classic Reciproc R25 and Reciproc blue R25 instruments were used. Transformation temperatures were determined by differential scanning calorimetry (DSC-DSC 60, Shimadzu, Kyoto, Japan). Three samples with approximately 20 mg of each system were cooled to -120 °C and then heated to 100 °C and then cooled to -100 °C at a rate of 10 °C min-1 . The maximum torque values and angular deflection until fracture of new instruments (n = 10) were measured according to ISO 3630-1. Results were analysed statistically using the Student's t-test at a significance level of P < 0.05. RESULTS DSC results revealed the absence of martensitic transformation for Reciproc instruments in the temperature range analysed. In both systems, the instruments were composed of a mixture of R-phase and austenite at room temperature. After torsional tests, Reciproc blue had significantly lower values for mean maximum torque at rupture (P < 0.05), although the angular deflection values were significantly higher than the Reciproc classic group (P < 0.05). CONCLUSIONS Both Reciproc and Reciproc blue instruments were composed of a mixture of R-phase and austenite. Reciproc Blue instruments had a greater angle of rotation to fracture but a lower torque to failure than M-Wire Reciproc instruments.
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Affiliation(s)
- G C Almeida
- Department of Restorative Dentistry, Faculty of Dentistry
| | - L C Guimarães
- Department of Restorative Dentistry, Faculty of Dentistry
| | - P D Resende
- Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - V T L Buono
- Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - I F C Peixoto
- Department of Restorative Dentistry, Faculty of Dentistry
| | - A C D Viana
- Department of Restorative Dentistry, Faculty of Dentistry
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Abstract
Microorganisms are a source of many high-value compounds which are useful to every living being, such as humans, plants and animals. Since the process of isolating and improving a microorganism can be lengthy and expensive, preserving the obtained characteristic is of paramount importance, so the process does not need to be repeated. Fungi are eukaryotic, achlorophyllous, heterotrophic organisms, usually filamentous, absorb their food, can be either macro or microscopic, propagate themselves by means of spores and store glycogen as a source of storage. Fungi, while infesting food, may produce toxic substances such as mycotoxins. The great genetic diversity of the Kingdom Fungi renders the preservation of fungal cultures for many years relevant. Several international reference mycological culture collections are maintained in many countries. The methodologies that are most fit for preserving microorganisms for extended periods are based on lowering the metabolism until it reaches a stage of artificial dormancy. The goal of this study was to analyze three methods for potentially toxigenic fungal conservation (Castellani’s, continuous subculture and lyophilization) and to identify the best among them.
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Affiliation(s)
| | - Ana Paula Fernandes
- Departamento de Ciência dos Alimentos Universidade Federal de Lavras LavrasMG Brazil
| | | | - Luís Roberto Batista
- Departamento de Ciência dos Alimentos Universidade Federal de Lavras LavrasMG Brazil
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Pereira UP, Soares SC, Blom J, Leal CAG, Ramos RTJ, Guimarães LC, Oliveira LC, Almeida SS, Hassan SS, Santos AR, Miyoshi A, Silva A, Tauch A, Barh D, Azevedo V, Figueiredo HCP. In silico prediction of conserved vaccine targets in Streptococcus agalactiae strains isolated from fish, cattle, and human samples. Genet Mol Res 2013; 12:2902-12. [PMID: 24065646 DOI: 10.4238/2013.august.12.6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Streptococcus agalactiae (Lancefield group B; group B streptococci) is a major pathogen that causes meningoencephalitis in fish, mastitis in cows, and neonatal sepsis and meningitis in humans. The available prophylactic measures for conserving human and animal health are not totally effective and have limitations. Effective vaccines against the different serotypes or genotypes of pathogenic strains from the various hosts would be useful. We used an in silico strategy to identify conserved vaccine candidates in 15 genomes of group B streptococci strains isolated from human, bovine, and fish samples. The degree of conservation, subcellular localization, and immunogenic potential of S. agalactiae proteins were investigated. We identified 36 antigenic proteins that were conserved in all 15 genomes. Among these proteins, 5 and 23 were shared only by human or fish strains, respectively. These potential vaccine targets may help develop effective vaccines that will help prevent S. agalactiae infection.
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Affiliation(s)
- U P Pereira
- AQUAVET - Laboratório de Doenças de Animais Aquáticos, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Abstract
A case of larva migrans or serpiginous linear dermatitis on the scalp of a teenager is reported. An ancylostomid larva was found within a sebaceous gland acinus. The unusual skin site for larva migrans as well as the penetration through the sebaceous gland are highlighted. The probable mechanism by which the parasite reached the skin adnexa is discussed.
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Affiliation(s)
- L C Guimarães
- Faculdade de Medicina do Triângulo Mineiro, Hospital Hélio Angotti (Associação de Combate ao Câncer do Brasil Central), Universidade de Uberaba, MG
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de Lima R, Perdigão C, Cravino J, Guimarães LC, Dantas M. [A case of perforation of the interventricular septum with free wall rupture, in the acute phase of myocardial infarct, successfully treated with surgery]. Rev Port Cardiol 1990; 9:619-24. [PMID: 2271217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The authors present a case of interventricular septal rupture with left ventricular free wall rupture post acute myocardial infarction operated on the third day after the onset of symptoms, by enfartectomy and application of a septal patch. Then, they compare this case with four cases referred in the literature, discussing the different and similar points between them. They emphasize the good results of this kind of surgery, but they also remark the need of an early diagnosis and surgery in these patients.
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Affiliation(s)
- R de Lima
- Serviço do Serviço de Cirurgia Cardiotorácica do Hospital de Santa Maria
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Da Costa JC, Rebocho MJ, Real MT, Guimarães LC. Results following closure of ostium secundum atrial septal defects. J Cardiovasc Surg (Torino) 1978; 19:567-70. [PMID: 153912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In a series of 41 patients of ASD (ostium secundum type) corrected by surgery, a clinical, radiological, electrocardiographic and echocardiographic follow-up study was performed. Good clinical results were obtained but some abnormalities can persist postoperatively: RV enlargement, dysrhythmias and mitral valve dysfunction.
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