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Cruz TM, Lima ADS, Silva AO, Mohammadi N, Zhang L, Azevedo L, Marques MB, Granato D. High-throughput synchronous erythrocyte cellular antioxidant activity and protection screening of phenolic-rich extracts: Protocol validation and applications. Food Chem 2024; 440:138281. [PMID: 38160597 DOI: 10.1016/j.foodchem.2023.138281] [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: 07/25/2023] [Revised: 12/13/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
Oxidative/nitrosative damage takes part in chronic disease development, which generates an urgent need for intervention and better therapies to manage them. The scientific community has demanded easy-to-run, cheap, and reliable methods for cellular antioxidant activity assays. This work standardised and validated an erythrocyte cellular antioxidant activity and membrane protection/injury (HERYCA-P) protocol to study food-derive extracts. The method measures intracellular reactive oxygen species (ROS) generation, lipoperoxidation, and haemolysis induced by 2,2'-azobis(2-amidinopropane) dihydrochloride. Quercetin decreased ROS generation by 50.4% and haemolysis by 2.2%, while ascorbic acid inhibited lipid peroxidation by 40.1%. Total phenolic contents of teas were correlated with decreased ROS generation (r = -0.924), lipoperoxidation (r = -0.951), and haemolysis (r = -0.869). The erythrocyte ROS generation and lipoperoxidation were also associated with CUPRAC (r = -0.925; r = -0.951) and hydroxyl radical scavenging activity (r = -0.936; r = -0.949). The precision rates of antioxidant standards and tea samples were below 15%. HERYCA-P is feasible as a complementary antioxidant assay for food matrices.
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Affiliation(s)
- Thiago Mendanha Cruz
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland; State University of Ponta Grossa (UEPG), Department of Chemistry, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Brazil
| | - Amanda Dos Santos Lima
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland; Federal University of Alfenas, Faculty of Nutrition, Rua Gabriel Monteiro da Silva, 714, 37130-000 Alfenas, Brazil
| | - Alessandra Oliveira Silva
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland; Federal University of Alfenas, Faculty of Pharmaceutical Sciences, Rua Gabriel Monteiro da Silva, 714, 37130-000 Alfenas, Brazil
| | - Nima Mohammadi
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland
| | - Liang Zhang
- Anhui Agricultural University, State Key Laboratory of Tea Plant Biology and Utilization, Hefei 230036, China
| | - Luciana Azevedo
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland; Federal University of Alfenas, Faculty of Nutrition, Rua Gabriel Monteiro da Silva, 714, 37130-000 Alfenas, Brazil
| | - Mariza Boscacci Marques
- State University of Ponta Grossa (UEPG), Department of Chemistry, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Brazil
| | - Daniel Granato
- University of Limerick, Faculty of Science and Engineering, Department of Biological Sciences, Bioactivity and Applications Lab, V94 T9PX Limerick, Ireland; Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland.
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Silva AO, Ribeiro JM, Patrocínio TB, Amorim GE, Pereira-Júnior AA, Ângelo ML, de Araújo Paula FB, de Mello Silva Oliveira N, Ruginsk SG, Antunes-Rodrigues J, Elias LLK, Dias MVS, Torres LH, Ceron CS. Protective Effects of Kefir Against Unpredictable Chronic Stress Alterations in Mice Central Nervous System, Heart, and Kidney. Probiotics Antimicrob Proteins 2023; 15:411-423. [PMID: 36534210 DOI: 10.1007/s12602-022-10031-9] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
Kefir is a probiotic mixture with anxiolytic and antioxidant properties. Chronic stress can lead to anxiety disorders and increase oxidative damage in organs such as the heart and kidney. In this study, we examined whether kefir ameliorates the anxiety-like behavior of mice submitted to chronic unpredictable stress (CUS) by modulating brain-derived neurotrophic factor (BDNF) and corticosterone levels and whether kefir modifies the oxidative parameters in the heart and kidney of mice. Male Swiss mice received kefir (0.3 mL/100 g/day) or milk for 30 days (gavage). On the 10th day, the mice were submitted to CUS. Behavioral analysis was performed using the elevated plus maze and forced swimming tests. BDNF levels were analyzed in brain tissues. Heart and kidney superoxide dismutase (SOD), catalase, glutathione (GSH), thiobarbituric acid reactive substances (TBARS), 3-nitrotyrosine, metalloproteinase-2 (MMP-2), and plasma corticosterone were evaluated. Kefir reverted the CUS-induced decrease in the time spent in the open arms, the increase in grooming frequency, and decrease in the head dipping frequency, but not the reduced immobility time. CUS decreased the cerebellum BDNF levels and increased corticosterone levels, which were restored by Kefir. Neither catalase and SOD activities nor GSH, TBARS, 3-nitrotyrosine, and MMP-2 were modified by CUS in the heart. In the kidney, CUS increased 3-nitrotyrosine and MMP-2. Kefir increased the antioxidant defense in the heart and kidney of control and CUS mice. These results suggest that kefir ameliorated CUS-induced anxiety-like behavior by modulating brain BDNF and corticosterone levels. Kefir also increased the antioxidant defense of mice heart and kidney.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Carla Speroni Ceron
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto (UFOP), Diogo de Vasconcelos, 122, 35400-000l, Ouro Preto, MG, Brazil.
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Pereira Júnior AA, de Amorim GES, Garcia RCT, Ribeiro JM, Silva AO, Almeida CADF, Ceron CS, Ruginsk SG, Antunes-Rodrigues J, Elias LLK, Dias MVS, Marcourakis T, Torres LH. Nicotine exposure through breastfeeding affects BDNF and synaptic proteins levels in the brain of stressed adult female mice. Int J Dev Neurosci 2022; 82:759-771. [PMID: 36018565 DOI: 10.1002/jdn.10227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 08/11/2022] [Accepted: 08/22/2022] [Indexed: 11/08/2022] Open
Abstract
Nicotine has been used during pregnancy and lactation as a tobacco harm reduction strategy. However, it is unclear whether nicotine exposure during a critical development period negatively impacts stress responses in adulthood. This study investigated how nicotine, administered via breastfeeding, affects the brain-derived neurotrophic factor (BDNF), synaptic proteins levels, and anxiety-like behavior in adult female mice subjected to stress. Female Swiss mice were exposed to saline or nicotine (8 mg/kg/day) through breastfeeding between their fourth and 17th postnatal days (P) via implanted osmotic mini pumps. The unpredictable chronic mild stress (UCMS) protocol was performed during their adulthood (P65) for 10 consecutive days, followed by the elevated plus maze (EPM) test one day after the protocol. Animals were euthanized and their blood, collected for plasma corticosterone measurements and their brain structures, dissected for BDNF and synaptic proteins analyses. We found no significant differences in corticosterone levels between groups (Saline/Non-stress, Nicotine/Non-stress, Saline/Stress, and Nicotine/Stress). The UCMS protocol hindered weight gain. Mice exposed to nicotine through breastfeeding with or without the UCMS protocol in adulthood showed higher grooming and head dipping frequency; decreased BDNF levels in cerebellum and striatum; increased postsynaptic density protein 95 (PSD-95), synapsin I, and synaptophysin levels in cerebellum; and decreased PSD-95 and synapsin I levels in brainstem. Our results indicate that nicotine exposure through breastfeeding leads to long-lasting behavioral effects and synaptic protein changes, most of which were independent of the UCMS protocol, even after a long nicotine-free period, highlighting the importance of further studies on nicotine exposure during development.
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Affiliation(s)
- Antonio Alves Pereira Júnior
- Department of Food and Drugs, School of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | | | - Raphael Caio Tamborelli Garcia
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo Diadema, São Paulo, Brazil
| | - Jéssyca Milene Ribeiro
- Department of Food and Drugs, School of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Alessandra Oliveira Silva
- Department of Food and Drugs, School of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | | | - Carla Speroni Ceron
- Department of Food and Drugs, School of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Silvia Graciela Ruginsk
- Department of Physiological Sciences, Biomedical Sciences Institute, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - José Antunes-Rodrigues
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Lucila Leico Kagohara Elias
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | - Tania Marcourakis
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Larissa Helena Torres
- Department of Food and Drugs, School of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
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do Valle GT, Ricci ST, Silva AO, Tirapelli CR, Ceron CS. Ethanol consumption increases renal dysfunction and mortality in a mice model of sub-lethal sepsis. Can J Physiol Pharmacol 2020; 99:699-707. [PMID: 33290154 DOI: 10.1139/cjpp-2020-0564] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chronic ethanol consumption and sepsis cause oxidative stress and renal dysfunction. This study aimed to examine whether chronic ethanol consumption sensitizes the mouse kidney to sub-lethal cecal ligation and puncture (SL-CLP) sepsis, leading to impairment of renal function by tissue oxidative and inflammatory damage. Male C57BL/6J mice were treated for 9 weeks with ethanol (20%, v/v) before SL-CLP was induced. Systolic blood pressure (SBP), survival rate, creatinine plasma, oxidative stress, and inflammatory parameters, inducible nitric oxide synthase (iNOS), cytokines, and metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) levels were evaluated. Chronic ethanol consumption increased SBP, plasma creatinine, O2.-, H2O2, lipid peroxidation, catalase activity, Nox4, IL-6, and TNF-α levels, and MMP-9/TIMP-1 ratio. SL-CLP decreased SBP, increased creatinine, lipid peroxidation, IL-6, TNF-α, nitrate/nitrite (NOx), and iNOS levels, and MMP-2/TIMP-2 ratio, and decreased catalase activity. SL-CLP mice previously treated with ethanol showed a similar decrease in SBP but higher mortality and creatinine levels than SL-CLP alone. These responses were mediated by increased O2-, lipid peroxidation, IL-6, TNF-α, NOx, iNOS, MMP-2, and MMP-9 levels, and MMP-9/TIMP-1 and MMP-2/TIMP-2 ratios. Our findings demonstrated that previous oxidative stress and inflammatory damage caused by ethanol consumption sensitizes the kidney to SL-CLP injury, resulting in impaired kidney function and sepsis prognosis.
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Affiliation(s)
- Gabriel Tavares do Valle
- Escola de Enfermagem de Ribeirão Preto (EERP), Universidade de São Paulo -USP, São Paulo, Brasil
| | - Sthefany Teodoro Ricci
- Escola de Enfermagem de Ribeirão Preto (EERP), Universidade de São Paulo -USP, São Paulo, Brasil
| | - Alessandra Oliveira Silva
- Departamento de Alimentos e Medicamentos, Universidade Federal de Alfenas (UNIFAL-MG), Minas Gerais, Brasil
| | - Carlos Renato Tirapelli
- Escola de Enfermagem de Ribeirão Preto (EERP), Universidade de São Paulo -USP, São Paulo, Brasil
| | - Carla Speroni Ceron
- Departamento de Alimentos e Medicamentos, Universidade Federal de Alfenas (UNIFAL-MG), Minas Gerais, Brasil.,Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto (UFOP), Minas Gerais, Brasil
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5
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Lima FRD, Martins GC, Silva AO, Vasques ICF, Engelhardt MM, Cândido GS, Pereira P, Reis RHCL, Carvalho GS, Windmöller CC, Moreira FMS, Guilherme LRG, Marques JJ. Critical mercury concentration in tropical soils: Impact on plants and soil biological attributes. Sci Total Environ 2019; 666:472-479. [PMID: 30802662 DOI: 10.1016/j.scitotenv.2019.02.216] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
Mercury is a toxic element that becomes a problem when present at high concentrations in soils. Mercury toxicity in soils varies depending on chemical species, concentration, exposure routes, and organism vulnerability. There is little information regarding the toxicity of Hg in tropical soils, especially for establishing safe levels of this pollutant. The purpose of this study was to investigate Hg concentrations in two tropical soils and their effect on oats and common beans, as well as on soil biological attributes. The experiment was carried out in a greenhouse, following ISO 11.269-2 and OECD-208 guidelines. Oat and common bean were cultivated in a Typic Hapludox (TyHpx) and Rhodic Acrudox (RhAcx) contaminated with HgCl2 at the following concentrations: 0, 2.5, 5.0, 10.0, 20.0, 40.0, and 80.0 mg of Hg kg-1 of dry soil. The biological variables analyzed were seedling emergence, vegetative growth, chlorophyll content (SPAD index), gas exchange (photosynthetic rate, internal CO2 concentration, transpiration rate, and stomatal conductance), and Hg concentration and accumulation in shoot dry matter. Microbial biomass carbon, soil basal respiration, and metabolic quotient (qCO2) were also analyzed. Due to the sorptive characteristics of TyHpx, it had higher Hg concentrations than RhAcx. Mercury showed toxic effects on both oat and common bean species. However, common bean was affected only at concentrations higher than 20 mg kg-1. The microbial community showed high sensitivity to soil Hg concentrations, but external factors, such as the plant species cultivated, influenced the sensitivity of the community. The microbiota was most sensitive in pots with common bean, and this effect was more pronounced at low clay and low organic matter contents (TyHpx). In this study, the concentration of 0.36 mg kg-1 was critical for Hg in these soils, based on its deleterious effects on oat and common bean and on biological soil attributes.
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Affiliation(s)
- F R D Lima
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - G C Martins
- Instituto Tecnológico Vale, Belém 66055-090, Pará State, Brazil
| | - A O Silva
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - I C F Vasques
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - M M Engelhardt
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - G S Cândido
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - P Pereira
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - R H C L Reis
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - G S Carvalho
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - C C Windmöller
- Departamento de Química, ICEX, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais State, Brazil
| | - F M S Moreira
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - L R G Guilherme
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil
| | - J J Marques
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil.
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Murta EFC, Silva AO, Silva EAC. Clinical significance of a negative loop electrosurgical excision procedure, conization and hysterectomy for cervical intraepithelial neoplasia. EUR J GYNAECOL ONCOL 2006; 27:50-2. [PMID: 16550969] [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: 05/07/2023]
Abstract
PURPOSE OF INVESTIGATION The absence of cervical intraepithelial neoplasia (CIN) in a loop electrosurgical excision procedure (LEEP), cold-knife conization and hysterectomy for treatment of CIN is an occasional finding of uncertain clinical significance. The aim of this study was to estimate the frequency of a negative procedure and its relationship to disease recurrence. METHODS A retrospective study was conducted on 263 specimens from women submitted to the LEEP (n = 142), conization (n = 101) or hysterectomy (n = 20) due to CIN. RESULTS The frequency of negative conization, LEEP and hysterectomy were, respectively, 15.5%, 19.8% and 25%. Recurrence occurred from 16 to 44 (median = 42) months in women with negative surgical specimens (LEEP or cold knife conization), and after five to 31 (median = 20) months after histological findings of CIN in surgical specimens, respectively, 7.1% and 11.2%. CONCLUSION The absence of CIN in those procedures of biopsy-confirmed CIN is a not an uncommon finding. Patients with positive or negative specimens should be carefully followed.
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Affiliation(s)
- E F C Murta
- Discipline of Gynecology and Obstetrics, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil
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Campiotto S, Pinho JRR, Carrilho FJ, Da Silva LC, Souto FJD, Spinelli V, Pereira LMMB, Coelho HSM, Silva AO, Fonseca JC, Rosa H, Lacet CMC, Bernardini AP. Geographic distribution of hepatitis C virus genotypes in Brazil. Braz J Med Biol Res 2005; 38:41-9. [PMID: 15665987 DOI: 10.1590/s0100-879x2005000100007] [Citation(s) in RCA: 130] [Impact Index Per Article: 6.8] [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: 12/14/2022] Open
Abstract
Brazil is a country of continental dimension with a population of different ethnic backgrounds. Thus, a wide variation in the frequencies of hepatitis C virus (HCV) genotypes is expected to occur. To address this point, 1,688 sequential samples from chronic HCV patients were analyzed. HCV-RNA was amplified by the RT-PCR from blood samples collected from 1995 to 2000 at different laboratories located in different cities from all Brazilian States. Samples were collected in tubes containing a gel separator, centrifuged in the site of collection and sent by express mail in a refrigerated container to Laboratório Bioquímico Jardim Paulista, São Paulo, SP, Brazil. HCV-RNA was extracted from serum and submitted to RT and nested PCR using standard procedures. Nested PCR products were submitted to cycle sequencing reactions without prior purification. Sequences were analyzed for genotype determination and the following frequencies were found: 64.9% (1,095) for genotype 1, 4.6% (78) for genotype 2, 30.2% (510) for genotype 3, 0.2% (3) for genotype 4, and 0.1% (2) for genotype 5. The frequencies of HCV genotypes were statistically different among Brazilian regions (P = 0.00017). In all regions, genotype 1 was the most frequent (51.7 to 74.1%), reaching the highest value in the North; genotype 2 was more prevalent in the Center-West region (11.4%), especially in Mato Grosso State (25.8%), while genotype 3 was more common in the South (43.2%). Genotypes 4 and 5 were rarely found and only in the Southeast, in São Paulo State. The present data indicate the need for careful epidemiological surveys throughout Brazil since knowing the frequency and distribution of the genotypes would provide key information for understanding the spread of HCV.
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Affiliation(s)
- S Campiotto
- Departamento de Biologia Molecular, Laboratório Bioquímico Jardim Paulista, São Paulo, SP, Brazil
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Macedo M, Espiga M, Lima MJ, Silva AO, Alcantra P, Ramalhinho V, Carmona J. BLOOD PRESURE IN PORTUGAL. DISTRIBUTION, AWARENESS, TREATMENT AND CONTROL OF HYPERTENSION. PAP STUDY. J Hypertens 2004. [DOI: 10.1097/00004872-200402001-00706] [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]
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Garcia CE, Ribeiro HB, Garcia RL, Copstein JL, Padilla JM, Santos TE, Amaral DD, Silva AO, D'Albuquerque LA. Mycophenolate mofetil in stable liver transplant patients with calcineurin inhibitor-induced renal impairment: single-center experience. Transplant Proc 2003; 35:1131-2. [PMID: 12947887 DOI: 10.1016/s0041-1345(03)00337-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- C E Garcia
- Centro Terapeutico Especializado em Figado (CETEFI), Real e Benemerita Sociedade Portuguesa de Beneficencia de Sao Paulo, Sao Paulo, Brazil.
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Abstract
The objective of the present work is to reflect on concepts of psychosocial rehabilitation and interdisciplinarity in the field of mental health. This study points out the importance of those themes for the mental health and/or psychiatric nursing knowledge and practice. Based on complex thought and ethic-esthetic paradigm, criticism is made regarding the rational paradigm. It also aims at building knowledge that can stimulate reflection, investigation, curiosity, questioning of "certainty" and the acceptance of multiple competitive narratives. Psychosocial rehabilitation is understood as a conception, not as a technique. Its is a process which enables the user to establish social and affectionate relationships in different contexts: at home, at work and society. Interdisciplinarity is the capacity of converging different specialized knowledge on the construction of one text. It was observed that the discussion of these themes allows the nursing professionals to understand their practices and knowledge on a utopian, ethical and esthetic dimension.
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Affiliation(s)
- F B de Oliveira
- Dep. de Enfermagem Saúde Pública e Psiquiatria-CCS Universidade-Federal da Paraíba
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11
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D'Albuquerque LA, Silva AO. [Portal hypertension treatment: the road had now a new and good rebuilding but still long and hard]. Arq Gastroenterol 2000; 37:145-7. [PMID: 11245156 DOI: 10.1590/s0004-28032000000300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sato MN, Carvalho AF, Silva AO, MacIel M, Fusaro AE, Duarte AJ. Low dose of orally administered antigen down-regulates the T helper type 2-response in a murine model of dust mite hypersensitivity. Immunology 1999; 98:338-44. [PMID: 10583591 PMCID: PMC2326944 DOI: 10.1046/j.1365-2567.1999.00869.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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
One of the main goals of immunotherapy of allergic diseases is the down-regulation of the type I hypersensitivity reaction. We investigated in this study the effect of oral administration of varying doses (0.25, 1.0, 4.0 and 10 mg) of dust mite extract (Dermatophagoides pteronyssinus, Dp) in sensitized A/Sn mice. A marked decrease of the allergen-specific immunoglobulin E (IgE) response was observed with all antigen doses. The mice orally tolerized with low Dp dose (0.25 mg) had a significant decrease in the total serum IgE and in the immunoglobulin G1 (IgG1), IgG2a and IgG2b antibody levels. The higher Dp dose (10.0 mg), however, enhanced the IgG1 antibody response, suggesting the stimulation of a pre-existing immune response of the sensitized animals. Animals fed with the low Dp dose had a significant decrease in the frequency of interleukin-4 (IL-4) secreting cells. These animals also showed a significant decrease in the frequency of Dp-specific IgE- and IgG1-positive plasma cells. Our data suggest that feeding dust mite extract to Dp-sensitized mice down-regulates the development of type I hypersensitivity, by inhibition of the T helper 2 response.
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Affiliation(s)
- M N Sato
- Laboratório de Alergia e Imunologia Clinica e Experimental-LIM 56, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Pinho JR, Zanotto PM, Ferreira JL, Sumita LM, Carrilho FJ, da Silva LC, Capacci ML, Silva AO, Guz B, Gonçales FL, Gonçales NS, Buck GA, Meyers GA, Bernardini AP. High prevalence of GB virus C in Brazil and molecular evidence for intrafamilial transmission. J Clin Microbiol 1999; 37:1634-7. [PMID: 10203545 PMCID: PMC84861 DOI: 10.1128/jcm.37.5.1634-1637.1999] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The prevalence of GB virus C (GBV-C) in candidate Brazilian blood donors with normal and elevated alanine aminotransferase levels was found to be 5.2% (5 of 95) and 6.5% (5 of 76), respectively. Among Brazilian patients, GBV-C was found in 9.5% (13 of 137) of cases of hepatitis not caused by hepatitis A virus (HAV), HBV, HCV, HDV, or HEV (non-A-E hepatitis) and in 18.2% (8 of 44) of individuals infected with HCV. Molecular characterization of GBV-C by partial sequencing of the NS3 region showed clustering between members of a single family, implying intrafamilial transmission. In conclusion, these results together suggest that contagion mechanisms which facilitate intrafamilial transmission of GBV-C may partially explain the high prevalence of viremic carriers worldwide.
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Affiliation(s)
- J R Pinho
- Serviço de Virologia, Instituto Adolfo Lutz, São Paulo, Brazil.
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14
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Pereira S, Almeida J, Silva AO, Quintas M, Candeias O, Freitas F. [Fatal liver necrosis due to allopurinol]. ACTA MEDICA PORT 1998; 11:1141-4. [PMID: 10192993] [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: 02/11/2023]
Abstract
Allopurinol hypersensitivity syndrome (AHS) is a severe reaction which is potentially lethal. Exanthematous rash, fever, eosinophilia, and other severe reactions such as toxic epidermal necrolysis, acute vasculitis, and severe hepatic and renal dysfunctions are manifestations of this syndrome. The authors report a case of lethal massive hepatic necrosis due to allopurinol in a patient with the asymptomatic hyperuricemia. They also describe the risk factors most frequently associated with the development of AHS and the strategy for its prevention and consequent reduction of the mortality associated with this syndrome.
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Affiliation(s)
- S Pereira
- Serviço de Medicina 2, Hospital de S. João, Porto
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Sato MN, Carvalho AF, Silva AO, MacIel M, Fusaro AE, Duarte AJ. Oral tolerance induced to house dust mite extract in naive and sensitized mice: evaluation of immunoglobulin G anti-immunoglobulin E autoantibodies and IgG-IgE complexes. Immunol Suppl 1998; 95:193-9. [PMID: 9824475 PMCID: PMC1364304 DOI: 10.1046/j.1365-2567.1998.00594.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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]
Abstract
We investigated the effect on specific antibody response of naive and sensitized mice orally administrated with low (0.25 mg) or high (10.0 mg) doses of Dermatophagoides pteronyssinus (Dp) extract. We also examined the effect of oral administration of Dp on the production of autoantibodies to immunoglobulin G (IgG) and immunoglobulin E (IgE). Naive and sensitized mice both showed a marked down-regulation of IgE antibody production, regardless of the dose of Dp. We also detected an inhibitory effect of the total IgE levels and the allergen-specific IgG1, IgG2a and IgG2b antibody response in sensitized mice given the low dose of Dp. In contrast, high doses of Dp stimulated IgG1 antibody production in both naive and sensitized animals. In addition, the oral tolerance induction protocol stimulated anti-F(ab')2gamma and anti-Fcgamma autoantibody production. Evaluation of IgG anti-IgE autoantibodies by a direct enzyme immunoassay (EIA) revealed the presence of these autoantibodies, predominantly of the IgG1 isotype, specifically in those animals fed with the high dose. In contrast, IgG-IgE complexes, determined by EIA using immobilized anti-IgE antibodies, were detected mainly in sera of control animals. The autoantibody anti-IgE specificity was tested against IgE-TNP and IgE-DANSYL murine proteins and revealed different inhibition profiles, suggesting the action of heterogeneous subpopulations of autoantibodies. Taken together, our results show that the oral tolerance protocol with Dp was able to modulate the production of allergen-specific IgE antibodies in both naive and sensitized animals. In addition, we suggest that anti-IgE autoantibodies participate in the modulation of allergic response triggered by oral tolerance protocols.
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Affiliation(s)
- M N Sato
- Laboratório de Imunogenética e Transplante Experimental LIM-56, Faculdade de Medicina da USP (FMUSP), São Paulo, Brasil
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Freitas J, Almeida J, Silva AO, Costa O, Carvalho M, de Freitas AF. [Circadian patterns of heart rate variability in patients with dysautonomia]. Rev Port Cardiol 1997; 16:313-5. [PMID: 9288991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- J Freitas
- Centro de Estudos da Função Autonómica, Hospital de S. João, Porto
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Hoshino-Shimizu S, De Brito T, Kanamura HY, Canto AL, Silva AO, Campos AR, Penna DO, Da Silva LC. Human schistosomiasis: Schistosoma mansoni antigen detection in renal glomeruli. Trans R Soc Trop Med Hyg 1976; 70:492-6. [PMID: 65811 DOI: 10.1016/0035-9203(76)90135-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Twelve kidney, five biopsy and seven necropsy specimens, all from schistosomiasis mansoni patients were studied by light and immunoflurescent microscopy in an attempt to detect antigen in the glomerular walls. Deposits of IgM, IgG,I gA, IgE, complement C3 and fibrinogen were observered in most cases. Antigen was successfully detected in two cases(one biopsy and one necropsy specimen), both exhibiting proliferative glomerulonephritis. The only clinical manifestation was a slight proteinuria. IgG antibodies eluted from the sutopsy kidney homogenates showed specific binding mostly to Schistosoma mansoni gut, thus spggesting that the fixed antibodies (eluates) are, at least partially, consituted by antibodies similar to the anti-circulating antigen. These data reinfroce the hypothesis that renal injury in schistosomiasis is mediated through an immune complex disease.
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