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Becker CU, Sartório CL, Campos-Carraro C, Siqueira R, Colombo R, Zimmer A, Belló-Klein A. Exercise training decreases oxidative stress in skeletal muscle of rats with pulmonary arterial hypertension. Arch Physiol Biochem 2022; 128:1330-1338. [PMID: 32449880 DOI: 10.1080/13813455.2020.1769679] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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] [Indexed: 12/17/2022]
Abstract
The effects of exercise training on oxidative stress in gastrocnemius of rats with pulmonary hypertension were studied. Four groups were established: sedentary control (SC), sedentary monocrotaline (SM), trained control (TC), trained monocrotaline (TM). Exercise was applied for 4 weeks, 5 days/week, 50-60 min/session, at 60% of VO2 max. Right ventricular (RV) pressures were measured, heart and gastrocnemius were removed for morphometric/biochemical analysis. Lipid peroxidation (LPO), H2O2, GSH/GSSG, and activity/expression of antioxidant enzymes were evaluated. Increased RV hypertrophy, systolic and end-diastolic pressures (RVEDP) were observed in SM animals, and the RVEDP was decreased in TM vs. SM. H2O2, SOD-1, and LPO were higher in the SM group than in SC. In TM, H2O2 was further increased when compared to SM, with a rise in antioxidant defences and a decrease in LPO. GSH/GSSG was higher only in the TC group. Exercise induced an efficient antioxidant adaptation, preventing oxidative damage to lipids.
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Affiliation(s)
- C U Becker
- Cardiovascular Physiology Laboratory, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - C L Sartório
- Department of Physiological Sciences, Federal University of Espírito Santo (UFES), Vitória, Brazil
| | - C Campos-Carraro
- Cardiovascular Physiology Laboratory, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - R Siqueira
- Cardiovascular Physiology Laboratory, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - R Colombo
- Pharmacology and Physiology Laboratory, University of Caxias do Sul, Caxias do Sul, Brazil
| | - A Zimmer
- Cardiovascular Physiology Laboratory, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - A Belló-Klein
- Cardiovascular Physiology Laboratory, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Rodrigues R, Vieira J, Vasconcelos G, Marinho L, Neto J, Siqueira R, Rocha R, Almeida G. Association of ANK2 Mutation and Massive Myocardial Calcification: A Case Report. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1420] [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: 11/25/2022] Open
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Rothschild C, Sabanai A, Santos A, Sousa C, Siqueira R, Ferretti T, Brandâo A, Diz M, Pereira J, Rocha V. PO-65 Pharmaceutical vigilance and education: the first 6 months of a new anticoagulant at a Brazilian cancer institute. Thromb Res 2021. [DOI: 10.1016/s0049-3848(21)00238-3] [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: 11/28/2022]
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Siqueira R, Lucena R, Guerra R, Vilela V, Vasconcelos R, Quaresma A, Riet-Correa F. Erratic migration of Ascaridia hermaphrodita (Nematoda: Ascaridida) in a blue-fronted Amazon parrot (Amazona aestiva) from illegal wildlife trade: case report. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Ascaridiasis by Ascaridia hermaphrodita is a common parasitic disease in blue-fronted Amazon parrots (Amazona aestiva) and the contamination occurs by ingestion of eggs. Illegal trade of wild birds can increase the frequency of visceral erratic migration by this parasite. Hence, this report describes the erratic migration of A. hermaphrodita and associated lesions in a blue-fronted Amazon parrot. This is a retrospective study, which originated from several apprehension of illegal birds in the state of Paraíba, Brazil. Necropsy revealed intense intestinal ascarid infestation. Hepatic lesions were also observed associated with the parasite migration. Stereoscopy allowed the identification of the morphology of the parasites. Summarizing, this condition in wild birds is not fully understood and may be associated with illegal trade.
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Affiliation(s)
| | - R.B. Lucena
- Universidade Federal de Campina Grande, Brazil
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Vasconcelos J, Siqueira R, Clementino I, Gama A, Alves A, Lucena R, Dantas A. Frequência das doenças de pele não tumorais em cães no município de João Pessoa, Paraíba, Brasil (2014-2016). ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO Diante da carência de estudos sobre a frequência de dermatopatias que acometem cães por região geográfica no Brasil, o presente estudo objetivou conhecer a frequência das principais doenças cutâneas que afetam cães na região metropolitana de João Pessoa, Paraíba, Brasil. Os dados foram coletados de cães que passaram por atendimento dermatológico no período de setembro de 2014 a dezembro de 2016. Além dos exames clínicos e dermatológicos os cães foram submetidos a exames complementares (citológico, raspado de pele, parasitológico, tricograma, bacteriológico, micológico, histopatológico e molecular). No período do estudo, foram atendidos 1.083 cães, em que 18,65% (202/1.083) apresentavam algum tipo de dermatopatia não tumoral. Dos 202 cães acometidos, 51,49% (104/202) eram machos e 48,51% (98/202), fêmeas. Desses 202 cães, 13 tinham dois diagnósticos, totalizando 215 dermatopatias. Dos cães afetados, 62,87% (127/202) eram de raça definida e 37,13% (75/202), sem raça definida (SRD). As lesões observadas com mais frequência caracterizaram-se por áreas alopécicas, hipotricoicas, maculosas, erosivas e ulcerativas, placoides, eritematosas, assim como comedões, colaretes, seborreia. As dermatopatias parasitárias foram as mais frequentes (35,35%; 76/215), seguidas pelas dermatopatias bacterianas (24,19%; 52/215), dermatopatias alérgicas (20,00%; 43/215), dermatopatias fúngicas (17,21%; 37/215), dermatopatias por outras causas (2,32%; 5/215) e pelas dermatopatias autoimunes (0,93%; 2/215). Os exames físicos e dermatológicos, incluindo anamnese detalhada, histórico clínico apurado, associado a exames complementares, são ferramentas importantes para o diagnóstico das dermatopatias em cães. Presume-se que a frequência de dermatopatias em cães na região de estudo possa ser maior do que a observada.
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Affiliation(s)
| | | | | | - A. Gama
- Universidade de Trás-os-Montes e Alto Douro, Portugal
| | - A. Alves
- Universidade de Trás-os-Montes e Alto Douro, Portugal
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Ravidà A, Siqueira R, Saleh I, Saleh M, Giannobile A, Wang H. Lack of Clinical Benefit of Implantoplasty to Improve Implant Survival Rate. J Dent Res 2020; 99:1348-1355. [DOI: 10.1177/0022034520944158] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The objective of this study was to compare postsurgical outcomes of resective treatment for peri-implantitis with and without implant surface modification (implantoplasty [IP]). This was accomplished by a retrospective analysis with data from patients with ≥1 implant who were surgically treated for peri-implantitis by resective therapy. Patients were divided into 2 groups regarding treatment approach: IP (test) and no IP (control). Retrospective data were obtained after implant placement (T0) and the day of peri-implantitis surgical treatment (T1). Patients were then recalled (≥1 y after T1) for clinical and radiographic examination (T2). The findings were conclusive. A total of 41 patients (68 implants; mean ± SD follow-up, 41.6 ± 24.4 mo) were included in this study. The survival rate at the implant level was 90% in the test group and 81.6% in the control group ( P > 0.05). Multilevel regression analysis showed that the probability of implant failure was influenced by marginal bone loss (MBL) at T1 and not surgical modality. For example, peri-implantitis defects ≥50% and 25% to 50% MBL were 18.6 and 8.86 times more likely to lose the implant, respectively, when compared with <25% MBL. Nonetheless, MBL changes were similar in the test and control groups ( P = 0.592). Similarly, changes in bleeding on probing, probing pocket depth, and suppuration at T2 did not differ between groups ( P > 0.05). Multilevel regression analysis indicated that clinical improvement of these parameters was influenced by the number of supportive peri-implant therapy visits ( P < 0.01). The results demonstrate little difference between the procedures. Regardless of the implant surface modification (IP) being performed or not, the survival rate of implants treated for peri-implantitis was primarily influenced by the amount of bone loss at the time of treatment. Other clinical parameters (MBL, probing pocket depth, bleeding on probing, suppuration) were influenced by the frequency of supportive peri-implant therapy visits and not by the IP procedure (ClinicalTrials.gov NCT04259840).
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Affiliation(s)
- A. Ravidà
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - R. Siqueira
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - I. Saleh
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - M.H.A. Saleh
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Department of Periodontics, School of Dentistry, University of Louisville, Louisville, KY, USA
| | - A. Giannobile
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - H.L. Wang
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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Gullo-Neto S, Padoin AV, Queiroz de Carvalho JE, Wendling R, Traesel MA, Kroth L, Miranda C, Balestro AC, Siqueira R, Chao Lisot B, Lima S, Mottin CC, Saitovitch D. Metabolic surgery for the treatment of type 2 diabetes in pancreas after kidney transplant candidates. Transplant Proc 2015; 46:1741-4. [PMID: 25131025 DOI: 10.1016/j.transproceed.2014.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Metabolic surgery for the treatment of type 2 diabetes mellitus (T2DM) in patients not morbidly obese (BMI <35) has been widely studied. Taking into account that ∼12% of pancreas transplants are performed in patients with T2DM, our goal was to evaluate the impact of metabolic surgery on the management of obese patients with T2DM on waiting lists for a pancreas transplant. We performed a Roux-en-Y gastrointestinal bypass in 5 patients with insulin-dependent T2DM who were candidates for pancreas after kidney transplant and with a BMI <35. Three patients became insulin independent by the end of the first year while the other 2 reduced their insulin requirements by 70%. Furthermore, all patients achieved improved control of lipid levels. We concluded that the surgery was effective in controlling blood glucose and lipid metabolism in these obese T2DM kidney transplant recipients. In this population, a pancreas transplant, along with its associated morbidity, may be avoided.
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Affiliation(s)
- S Gullo-Neto
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil; General and Digestive Tract Surgery Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | - A Vontobel Padoin
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil; General and Digestive Tract Surgery Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | | | - R Wendling
- Anesthesiology Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | - M A Traesel
- Nephrology Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | - L Kroth
- Nephrology Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | - C Miranda
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - A Colombo Balestro
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - R Siqueira
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - B Chao Lisot
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - S Lima
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - C Corá Mottin
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil; General and Digestive Tract Surgery Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil
| | - D Saitovitch
- Medical School of the Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil; Nephrology Service, São Lucas Hospital-PUCRS, Porto Alegre, Brazil.
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Siqueira R, Campos C, Colombo R, Becker CU, Fernandes TRG, Araújo ASR, Belló-Klein A. Influence of estrogen on pulmonary arterial hypertension: role of oxidative stress. Cell Biochem Funct 2011; 29:543-8. [DOI: 10.1002/cbf.1784] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- R. Siqueira
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - C. Campos
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - R. Colombo
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - C. U. Becker
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - T. R. G. Fernandes
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - A. S. R. Araújo
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
| | - A. Belló-Klein
- Laboratório de Fisiologia Cardiovascular; Departamento de Fisiologia; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS; Brazil
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Siqueira R, Durso N, Almada AG, Moreira MT, Massad GB. [Reflections on the causes of early weaning observed through group dynamics in groups for encouraging breastfeeding]. J Pediatr (Rio J) 1994; 70:16-20. [PMID: 14688889 DOI: 10.2223/jped.752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Nanavati NJ, Daxini BV, Pilane K, Bhatt GS, Mashru MR, Siqueira R, Joshi VR. Mitral valve prolapse with cerebrovascular accident in a young patient. J Assoc Physicians India 1986; 34:809-11. [PMID: 3558309] [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: 01/06/2023]
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Jones A, Razniewska T, Lesser BH, Siqueira R, Berk D, Behie LA, Gaucher GM. An assay for the measurement of the protein content of cells immobilized in carrageenan. Can J Microbiol 1984; 30:475-81. [PMID: 6744121 DOI: 10.1139/m84-069] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A reliable and reproducible method for the estimation of the protein content of fungal cells immobilized in a carrageenan gel is described. The procedure depends upon the acid lability of the polysaccharide gel at 90 degrees C and on the acetone solubility of accumulated phenolics. Freeze-dried gel beads (2-3 mm) containing entrapped cells of Penicillium urticae were ground to a fine powder and samples of powder (approximately 20 mg) were sequentially extracted with hot 1 N HCl - 0.9% NaCl and acetone. The precipitated residue contained the cell protein, which was then solubilized with 1 N NaOH at 90 degrees C and quantitated by the Folin-Lowry method. Interferences from both carrageenan and phenols were thus eliminated. The presence of carrageenan (20-25 mg) did not affect the recovery of varying amounts (0-2500 micrograms) of bovine serum albumin. The recovery of radiolabeled protein from immobilized cells was parallel to that of Folin-Lowry positive material over a range of 0-60 beads (0-60 mg powder). Cycloheximide (0-100 micrograms/mL) was shown to progressively inhibit the incorporation of L-[U-14C]leucine so that the radioactivity present in the initial HCl-NaCl extract (i.e., [14C]leucine) increased as that in the final NaOH extract (i.e., 14C-labeled protein) decreased. Using this new assay for cell protein, free and immobilized cell cultures were found to exhibit virtually identical kinetics of glucose utilization, growth, and patulin production. In addition to providing a means of comparing the specific productivity of free versus immobilized cell preparations, this assay accurately measures the incorporation of [14C]leucine into cellular protein and could be used as a measure of cell viability.
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