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Guimarães AGC, Lopes LES, Capelassi AN, Araújo ACF, Balbo SL, Blanc HNH, Freitas IN, Silva JN, Ribeiro RA, Bonfleur ML. Morphological alterations in gastrointestinal organs of western-diet obese rats submitted to vertical sleeve gastrectomy or Roux-en-Y gastric bypass. AN ACAD BRAS CIENC 2021; 93:e20200884. [PMID: 34495204 DOI: 10.1590/0001-3765202120200884] [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] [Received: 06/07/2020] [Accepted: 09/11/2020] [Indexed: 11/22/2022] Open
Abstract
To assess the effect of vertical sleeve gastrectomy (VSG) and Roux-en-Y gastric bypass (RYGB) on the esophageal and intestinal morphology of western diet (WD)-obese rats and to characterize the stomach histopathology of WD rats submitted to VSG. Male Wistar rats received WD from 2-4 months of age, to induce obesity, before randomly submitting them to pseudo (WD-SHAM), VSG (WD-VSG) or RYGB (WD-RYGB) surgeries. Gastrointestinal histomorphometry was performed at 3-months post-surgery. The upper esophagus of VSG and RYGB rats increased luminal area, while reductions in the keratin layer of the mucosa and the tunica muscularis were observed only in the RYGB animals. In the lower esophagus, both surgeries increased keratin layer thickness, but reduced the mucosal mucus content, while RYGB increased the thickness of the tunica mucosa and muscularis. The glandular region of the stomach of WD-VSG rats exhibited hypotrophy, epithelial erosion, fibrosis and moderate inflammatory infiltration. VSG and RYGB increased the villi height in the ileum, and the thickness of the tunica muscularis in the jejunum and ileum of WD rats; furthermore, RYGB augmented the ileal villi height. Thus both approaches induced histomorphological alterations in the esophagus and intestine and VSG damaged the gastric mucosa, even over the long-term.
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Affiliation(s)
- Alana G C Guimarães
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Luana E S Lopes
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Angélica N Capelassi
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Allan C F Araújo
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Médicas e Farmacêuticas, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Sandra L Balbo
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
| | - Helene N H Blanc
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Israelle N Freitas
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Juliana N Silva
- Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Rua Aluízio da Silva Gomes, 50, Granja dos Cavaleiros, 27933-378 Macaé, RJ, Brazil
| | - Rosane A Ribeiro
- Universidade Estadual de Ponta Grossa (UEPG), Setor de Ciências Biológicas e da Saúde (SEBISA), Departamento de Biologia Geral, Campos Uvaranas, Avenida General Carlos Cavalcanti, 4748, 84010-330 Ponta Grossa, PR, Brazil
| | - Maria Lúcia Bonfleur
- Universidade Estadual do Oeste do Paraná (UNIOESTE), Centro de Ciências Biológicas e da Saúde, Laboratório de Fisiologia Endócrina e Metabolismo (LAFEM), Rua Universitária, 1069, 85819-110 Cascavel, PR, Brazil
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2
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Oliveira KM, Figueiredo LS, Araujo TR, Freitas IN, Silva JN, Boschero AC, Ribeiro RA. Prolonged bisphenol-A exposure decreases endocrine pancreatic proliferation in response to obesogenic diet in ovariectomized mice. Steroids 2020; 160:108658. [PMID: 32442623 DOI: 10.1016/j.steroids.2020.108658] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 01/29/2020] [Revised: 04/24/2020] [Accepted: 05/14/2020] [Indexed: 12/23/2022]
Abstract
Research on the deleterious actions of bisphenol (BP)-A have focused on its effects on insulin secretion during pre/perinatal periods or adulthood. Estrogens also modulate endocrine pancreas physiology in females during aging; however, the effects of BPA on islet morphophysiology after menopause have not been investigated. We evaluated the effects of BPA exposure on glucose homeostasis and islet morphofunction in ovariectomized (OVX) mice fed on a high-fat diet (HFD). Adult Swiss female mice were underwent to bilateral ovariectomy, and with the confirmation of the establishment of surgical menopause, the females were then submitted, or not,to a normolipidic diet or HFD [control (CTL) and HFD groups, respectively] without or with 1 μg/mL BPA in their drinking water (CBPA and HBPA groups) for 90 days. HFD females displayed obesity, hyperglycemia, hyperinsulinemia, glucose intolerance and insulin resistance. BPA did not modulate HFD-induced obesity or body glucose impairments in HBPA females, and islets isolated from both the HFD and HBPA groups exhibited insulin hypersecretion. The HBPA islets, however, displayed enlarged islet cells and reduced proliferation, in association with the downregulation of mRNAs encoding PDX-1, NGN3 and CCND2 and upregulation of mRNAs encoding ER-β, GPR30, TNF-α and IL-1β in HBPA islets. BPA consumption in OVX mice impaired the islet-cell hyperplasia response to the HFD, partly mediated by increased expression of ER-β and GPR30, which impaired the expression of major genes involved in islet-cell survival and functionality. Together with higher pro-inflammatory cytokines expression in the islet milieu, these alterations may accelerate β-cell failure in postmenopause.
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Affiliation(s)
- Kênia M Oliveira
- Federal University of Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | | | - Thiago R Araujo
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Israelle N Freitas
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Juliana N Silva
- Federal University of Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | - Antonio C Boschero
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Rosane A Ribeiro
- Federal University of Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil.
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Seregheti TMQ, Pinto APR, Gonçalves MDC, Antunes ADS, Almeida WADS, Machado RS, Silva JN, Ferreira PMP, Pessoa C, Santos VMRD, Nascimento AMD. Antiproliferative and photoprotective activities of the extracts and compounds from Calea fruticosa. ACTA ACUST UNITED AC 2020; 53:e9375. [PMID: 32696817 PMCID: PMC7372941 DOI: 10.1590/1414-431x20209375] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 05/27/2020] [Indexed: 11/24/2022]
Abstract
In this paper, we complement our previous study on the antiproliferative activity
of Calea fruticosa (Asteraceae) by isolating the compounds
apigenin-4',7-dimethyl ether (1), budlein A (2), quercetin (3), and cichoriin
(4) from the plant’s aerial parts. The antiproliferative activity of these
compounds was evaluated by the
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method
against human tumor cell lines. Compound 3 displayed moderate antiproliferative
activity in three cell lines (HCT-116, PC-3, and SF-295, with cell growth
inhibition values of 72.97, 74.55, and 68.94%) and high antiproliferative
activity (90.86%) in the HL-60 cell line. The in vitro sun
protection factor (SPF) of the extracts and compound 4, with and without
sunscreen, was determined by a spectrophotometric method. The ethanol extract
exhibited the highest SPF (9.67) at a concentration of 0.100 mg/mL, while
compound 4, isolated from this extract, showed a SPF of 13.79 at the same
concentration. A relative increased efficacy of SPF was observed for the
extracts and compound 4 when sunscreen was also used. Compound 4 has not been
reported previously from any species within the genus Calea.
Compounds 1–4 were obtained from this species for the first time.
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Affiliation(s)
- T M Q Seregheti
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - A P R Pinto
- Departamento de Química, Programa de Pós-Graduação em Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - M da C Gonçalves
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - A Dos S Antunes
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - W A da S Almeida
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - R S Machado
- Departamento de Biofísica e Fisiologia, Laboratório de Cancerologia Experimental, Programas de Pós-Graduação em Ciências Farmacêuticas e Biotecnologia, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - J N Silva
- Departamento de Biofísica e Fisiologia, Laboratório de Cancerologia Experimental, Programas de Pós-Graduação em Ciências Farmacêuticas e Biotecnologia, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - P M P Ferreira
- Departamento de Biofísica e Fisiologia, Laboratório de Cancerologia Experimental, Programas de Pós-Graduação em Ciências Farmacêuticas e Biotecnologia, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - C Pessoa
- Departamento de Fisiologia e Farmacologia, Programa de Pós-Graduação em Farmacologia, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - V M R Dos Santos
- Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
| | - A M do Nascimento
- Departamento de Química, Programa de Pós-Graduação em Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG, Brasil
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Figueiredo LS, Oliveira KM, Freitas IN, Silva JA, Silva JN, Favero-Santos BC, Bonfleur ML, Carneiro EM, Ribeiro RA. Bisphenol-A exposure worsens hepatic steatosis in ovariectomized mice fed on a high-fat diet: Role of endoplasmic reticulum stress and fibrogenic pathways. Life Sci 2020; 256:118012. [PMID: 32593710 DOI: 10.1016/j.lfs.2020.118012] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 04/23/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 02/07/2023]
Abstract
AIMS Bisphenol (BP)-A exposure can impair glucose and lipid metabolism. However, it is unclear whether this endocrine disruptor (ED) modulates these processes in postmenopause, a period with organic changes that increase the risk for metabolic diseases. Herein, we evaluated the effects of BPA exposure on adiposity, glucose homeostasis and hepatic steatosis in ovariectomized (OVX) mice fed on a high-fat diet (HFD). MAIN METHODS Adult Swiss female mice were OVX and submitted to a normolipidic diet or HFD and drinking water without [control (OVX CTL) and OVX HFD groups, respectively] or with 1 μg/mL BPA (OVX CBPA and OVX HBPA groups, respectively), for 3 months. KEY FINDINGS OVX HFD females displayed increased adiposity, glucose intolerance, insulin resistance and moderate hepatic steatosis. This effect was associated with a high hepatic expression of genes involved in lipogenesis (Srebf1 and Scd1), β-oxidation (Cpt1a) and endoplasmic reticulum (ER) stress (Hspa5 and Hyou1). BPA did not alter adiposity or glucose homeostasis disruptions induced by HFD. However, this ED triggered severe steatosis, exacerbating hepatic fat and collagen depositions in OVX HBPA, in association with a reduction in Mttp mRNA, and up-regulation of genes involved in β-oxidation (Acox1 and Acadvl), mitochondrial uncoupling (Ucp2), ER stress (Hyou1 and Atf6) and chronic liver injury (Tgfb1and Casp8). Furthermore, BPA caused mild steatosis in OVX CBPA females, increasing the hepatic total lipids and mRNAs for Srebf1, Scd1, Hspa5, Hyou1 and Atf6. SIGNIFICANCE BPA aggravated hepatic steatosis in OVX mice. Especially when combined with a HFD, BPA caused NAFLD progression, which was partly mediated by chronic ER stress and the TGF-β1 pathway.
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Affiliation(s)
- Letícia S Figueiredo
- Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | - Kênia M Oliveira
- Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | - Israelle N Freitas
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Joel A Silva
- Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | - Juliana N Silva
- Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil
| | - Bianca C Favero-Santos
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Maria Lúcia Bonfleur
- Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Campus Cascavel, Cascavel, PR, Brazil
| | - Everardo M Carneiro
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Rosane A Ribeiro
- Laboratório de Fisiopatologia, Divisão de Pesquisa Integrada em Produtos Bioativos e Biociências (DPBio), Polo Novo Cavaleiros, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, Macaé, RJ, Brazil; Setor de Ciências Biológicas e da Saúde (SEBISA), Departamento de Biologia Geral, Universidade Estadual de Ponta Grossa (UEPG), Ponta Grossa, PR, Brazil.
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Silva JN, Baliza MD, Freitas F, Cruz ES, Camilo VMA, Silva IMM. Genotypical characterization of thermotolerant coliforms isolated from food produced by a Solidarity Economic Venture of Bahia (Brazil). BRAZ J BIOL 2020; 81:189-194. [PMID: 32267294 DOI: 10.1590/1519-6984.226833] [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] [Received: 07/31/2019] [Accepted: 10/04/2019] [Indexed: 11/21/2022] Open
Abstract
Many Solidarity Economic Venture (SEV) are family farmers who seek to add value to production through artisanal processing, which can lead to food contamination. Thus, this study aimed to genotypically characterize thermotolerant coliforms (TtC) strains from food produced by local agribusinesses of SEV during January to April 2019. Samples from thirteen production units (PU) from the SEV were submitted to a microbiological analysis of thermotolerant coliforms (AFNOR 3M1/2 - 09/89), using a fast count method in Petrifilm™ dishes. The Polymerase Chain Reaction (PCR) technique was used to verify the following virulence genes (VGs) associated with Escherichia coli: stx, typical from enterohemorrhagic E. coli (EHEC); bfpA typical from entheropathogenic E. coli (EPEC) and elt and slt, typical from entherotoxigenic E. coli (ETEC). The results showed that two samples of queijadinha (typical Brazilian candy made with eggs and coconut) and one sample of cassava cake presented characteristic colonies TtC. This way, three strains were isolated in order to perform the PCR technique. However, the genes used in the reaction were not detected in the isolated strains. Therefore, it is suggested that the isolated strains are from E. coli pathotypes with different virulence genes than the ones analyzed belong other types of TtC, such as Enterobacter and Klebsiella. Although the virulence of genes has not been confirmed, the presence of TtC on food indicates hygiene flaws during production and, therefore, measurements to control and prevent contamination should be taken.
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Affiliation(s)
- J N Silva
- Programa de Pós-graduação em Microbiologia Agrícola, Centro de Ciências Agrárias, Ambientais e Biológicas, Universidade Federal do Recôncavo da Bahia (UFRB), Rua Rui Barbosa, 710, Centro, CEP 44380-000, Cruz das Almas, BA, Brasil
| | - M D Baliza
- Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Centro de Ciências da Saúde - COMEPS, Universidade Federal do Recôncavo da Bahia (UFRB), Avenida Carlos Amaral, R. do Cajueiro, 1015, CEP 44570-000, Santo Antônio de Jesus, BA, Brasil
| | - F Freitas
- Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Centro de Ciências da Saúde - COMEPS, Universidade Federal do Recôncavo da Bahia (UFRB), Avenida Carlos Amaral, R. do Cajueiro, 1015, CEP 44570-000, Santo Antônio de Jesus, BA, Brasil
| | - E S Cruz
- Programa de Pós-graduação em Microbiologia Agrícola, Centro de Ciências Agrárias, Ambientais e Biológicas, Universidade Federal do Recôncavo da Bahia (UFRB), Rua Rui Barbosa, 710, Centro, CEP 44380-000, Cruz das Almas, BA, Brasil.,Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Centro de Ciências da Saúde - COMEPS, Universidade Federal do Recôncavo da Bahia (UFRB), Avenida Carlos Amaral, R. do Cajueiro, 1015, CEP 44570-000, Santo Antônio de Jesus, BA, Brasil
| | - V M A Camilo
- Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Centro de Ciências da Saúde - COMEPS, Universidade Federal do Recôncavo da Bahia (UFRB), Avenida Carlos Amaral, R. do Cajueiro, 1015, CEP 44570-000, Santo Antônio de Jesus, BA, Brasil
| | - I M M Silva
- Programa de Pós-graduação em Microbiologia Agrícola, Centro de Ciências Agrárias, Ambientais e Biológicas, Universidade Federal do Recôncavo da Bahia (UFRB), Rua Rui Barbosa, 710, Centro, CEP 44380-000, Cruz das Almas, BA, Brasil.,Complexo Multidisciplinar de Estudos e Pesquisa em Saúde, Centro de Ciências da Saúde - COMEPS, Universidade Federal do Recôncavo da Bahia (UFRB), Avenida Carlos Amaral, R. do Cajueiro, 1015, CEP 44570-000, Santo Antônio de Jesus, BA, Brasil
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Araujo TR, da Silva JA, Vettorazzi JF, Freitas IN, Lubaczeuski C, Magalhães EA, Silva JN, Ribeiro ES, Boschero AC, Carneiro EM, Bonfleur ML, Ribeiro RA. Glucose intolerance in monosodium glutamate obesity is linked to hyperglucagonemia and insulin resistance in α cells. J Cell Physiol 2018; 234:7019-7031. [DOI: 10.1002/jcp.27455] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 08/29/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Thiago R. Araujo
- Campus UFRJ‐Macaé, Universidade Federal do R io de Janeiro Macaé Brazil
| | - Joel A. da Silva
- Campus UFRJ‐Macaé, Universidade Federal do R io de Janeiro Macaé Brazil
| | - Jean F. Vettorazzi
- Departamento de Biologia Estrutural e Funcional Instituto de Biologia, Universidade Estadual de Campinas Campinas Brazil
| | | | - Camila Lubaczeuski
- Departamento de Biologia Estrutural e Funcional Instituto de Biologia, Universidade Estadual de Campinas Campinas Brazil
| | | | - Juliana N. Silva
- Campus UFRJ‐Macaé, Universidade Federal do R io de Janeiro Macaé Brazil
| | - Elane S. Ribeiro
- Campus UFRJ‐Macaé, Universidade Federal do R io de Janeiro Macaé Brazil
| | - Antonio C. Boschero
- Departamento de Biologia Estrutural e Funcional Instituto de Biologia, Universidade Estadual de Campinas Campinas Brazil
| | - Everardo M. Carneiro
- Departamento de Biologia Estrutural e Funcional Instituto de Biologia, Universidade Estadual de Campinas Campinas Brazil
| | - Maria L. Bonfleur
- Centro de Ciências Biológicas e da Saúde Universidade Estadual do Oeste do Paraná (UNIOESTE) Cascavel Brazil
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Rodrigues AS, Nunes MJ, Lopes A, Silva JN, Ciríaco L, Pacheco MJ. Electrodegradation of naphthalenic amines: Influence of the relative position of the substituent groups, anode material and electrolyte on the degradation products and kinetics. Chemosphere 2018; 205:433-442. [PMID: 29705634 DOI: 10.1016/j.chemosphere.2018.04.104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/20/2018] [Revised: 03/24/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
The electrodegradation of the 4-aminonaphthalene-1-sulfonic acid (4AN1S), 5-aminonaphthalene-2-sulfonic acid (5AN2S) and 8-aminonaphthalene-2-sulfonic acid (8AN2S) was studied, using two electrode materials as anode, BDD and Ti/Pt/PbO2, and two different electrolytes, sodium sulfate and sodium chloride. The highest COD removal rates were obtained at BDD: for 5AN2S and 8AN2S results were similar in both electrolytes; for 4AN1S, results were better in sodium chloride. The lowest COD removal rates were obtained at the system Ti/Pt/PbO2-sodium sulfate, for all the studied amines. The dissolved organic carbon (DOC) removal was much higher at BDD for all the amines, in sulfate for 5AN2S and 8AN2S and in chloride for 4AN1S. Nitrogen removal was always almost irrelevant in sulfate medium but higher than 60%, after 6-h assays, in chloride. The highest combustion efficiencies were attained at the system BDD-sodium sulfate and were: 4AN1S-75%; 5AN2S-84%; 8AN2S-74%. HPLC results show that total degradation of the studied aminonaphthalene sulfonates is attained at both anode materials, utilizing any of the electrolytes, with a first order kinetics. However, kinetic constants obtained with the variation of the amines concentration in time are 10-40 times higher in chloride, being slightly higher at Ti/Pt/PbO2 than at BDD. Regarding the presence of carboxylic acids during the degradation assays, it was observed that the electrolysis of the amines 5AN2S and 8AN2S always lead to higher amounts of oxalic acid and lower quantities of acetic acid than the electrolysis of the amine 4AN1S.
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Affiliation(s)
- A S Rodrigues
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
| | - M J Nunes
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
| | - A Lopes
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal.
| | - J N Silva
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
| | - L Ciríaco
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
| | - M J Pacheco
- FibEnTech-UBI Research Unit and Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
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Silva JN, Miranda LHM, Menezes RC, Gremião IDF, Oliveira RVC, Vieira SMM, Conceição-Silva F, Ferreiro L, Pereira SA. Comparison of the Sensitivity of Three Methods for the Early Diagnosis of Sporotrichosis in Cats. J Comp Pathol 2018; 160:72-78. [PMID: 29729723 DOI: 10.1016/j.jcpa.2018.03.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 05/08/2017] [Revised: 01/22/2018] [Accepted: 03/13/2018] [Indexed: 10/17/2022]
Abstract
Sporotrichosis is caused by species of fungi within the Sporothrix schenckii complex that infect man and animals. In Rio de Janeiro, Brazil, an epidemic has been observed since 1998, with most of the cases being related to transmission from infected cats. Although the definitive diagnosis of feline sporotrichosis is made by fungal culture, cytopathological and histopathological examinations are used routinely, because the long culture period may delay treatment onset. However, alternative methods are desirable in cases of low fungal burden. Immunohistochemistry (IHC) has been described as a sensitive method for diagnosing human and canine sporotrichosis, but there are no reports of its application to cats. The aim of this study was to analyse the sensitivity of cytopathological examination (Quick Panoptic method), histopathology (Grocott silver stain) and anti-Sporothrix IHC by blinded comparisons, using fungal culture as the reference standard. Samples were collected from 184 cats with sporotrichosis that exhibited skin ulcers. The sensitivities of Grocott silver stain, cytopathological examination and IHC were 91.3%, 87.0% and 88.6%, respectively. Grocott silver stain showed the best performance. IHC showed high sensitivity, as did cytopathological examination and these may be considered as alternative methodologies. When the three methods were combined, the diagnosis was established in 180 (97.8%) out of 184 cases. Taken together, these findings indicate the need to implement these methods as routine tools for the early diagnosis of sporotrichosis in cats, notably when fungal culture is not available.
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Affiliation(s)
- J N Silva
- Laboratório de Micologia, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Agronomia, Porto Alegre, Rio Grande do Sul, Brazil; Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil
| | - L H M Miranda
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil.
| | - R C Menezes
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil
| | - I D F Gremião
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil
| | - R V C Oliveira
- Laboratório de Epidemiologia Clínica, INI/Fiocruz, Av. Brasil 4036/201A, Manguinhos, Rio de Janeiro, Brazil
| | - S M M Vieira
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil
| | - F Conceição-Silva
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz/Fiocruz, Av. Brasil 4365/Pavilhão 26/406C, Manguinhos, Rio de Janeiro, Brazil
| | - L Ferreiro
- Laboratório de Micologia, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Agronomia, Porto Alegre, Rio Grande do Sul, Brazil
| | - S A Pereira
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto Nacional de Infectologia Evandro Chagas (INI), Fundação Oswaldo Cruz (Fiocruz), Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil
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9
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Cruz CS, Costa EP, Machado JA, Silva JN, Romeiro NC, Moraes J, Silva JR, Fonseca RN, Vaz IS, Logullo C, Campos E. A soluble inorganic pyrophosphatase from the cattle tick Rhipicephalus microplus capable of hydrolysing polyphosphates. Insect Mol Biol 2018; 27:260-267. [PMID: 29271528 DOI: 10.1111/imb.12369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polyphosphates have been found in all cell types examined to date and play diverse roles depending on the cell type. In eukaryotic organisms, polyphosphates have been investigated mainly in mammalian cells, and only a few studies have addressed arthropods. Pyrophosphatases have been shown to regulate polyphosphate metabolism. However, these studies were restricted to trypanosomatids. Here we focus on the tick Rhipicephalus microplus, a haematophagous ectoparasite that is highly harmful to cattle. We produced a recombinant R. microplus pyrophosphatase (rRmPPase) with the aim of investigating its kinetic parameters using polyphosphates as substrate. Molecular docking assays of RmPPase with polyphosphates were also carried out. The kinetic and Hill coefficient parameters indicated that rRmPPase has a greater affinity, higher catalytic efficiency and increased cooperativity for sodium phosphate glass type 15 (polyP15 ) than for sodium tripolyphosphate (polyP3 ). Through molecular docking, we found that polyP3 binds close to the Mg2+ atoms in the catalytic region of the protein, participating in their coordination network, whereas polyP15 interactions involve negatively charged phosphate groups and basic amino acid residues, such as Lys56, Arg58 and Lys193; polyP15 has a more favourable theoretical binding affinity than polyP3 , thus supporting the kinetic data. This study shows, for the first time in arthropods, a pyrophosphatase with polyphosphatase activity, suggesting its participation in polyphosphate metabolism.
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Affiliation(s)
- C S Cruz
- Laboratório Integrado de Bioquímica - Hatisaburo Masuda, UFRJ, NUPEM, São José do Barreto, Macaé, Rio de Janeiro, Brazil
| | - E P Costa
- Laboratório de Química e Função de Proteínas e Peptídeos and Unidade de Experimentação Animal - CBB - UENF, Horto, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - J A Machado
- Laboratório de Química e Função de Proteínas e Peptídeos and Unidade de Experimentação Animal - CBB - UENF, Horto, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - J N Silva
- Laboratório de Química e Função de Proteínas e Peptídeos and Unidade de Experimentação Animal - CBB - UENF, Horto, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - N C Romeiro
- Laboratório de Química e Função de Proteínas e Peptídeos and Unidade de Experimentação Animal - CBB - UENF, Horto, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - J Moraes
- Laboratório Integrado de Bioquímica - Hatisaburo Masuda, UFRJ, NUPEM, São José do Barreto, Macaé, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
| | - J R Silva
- Laboratório Integrado de Bioquímica - Hatisaburo Masuda, UFRJ, NUPEM, São José do Barreto, Macaé, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
| | - R N Fonseca
- Laboratório Integrado de Bioquímica - Hatisaburo Masuda, UFRJ, NUPEM, São José do Barreto, Macaé, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
| | - I S Vaz
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
- Centro de Biotecnologia e Faculdade de Veterinária, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - C Logullo
- Laboratório de Química e Função de Proteínas e Peptídeos and Unidade de Experimentação Animal - CBB - UENF, Horto, Campos dos Goytacazes, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
| | - E Campos
- Laboratório Integrado de Bioquímica - Hatisaburo Masuda, UFRJ, NUPEM, São José do Barreto, Macaé, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia - Entomologia Molecular, Rio de Janeiro, Brazil
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10
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Ma-Hock L, Farias PMA, Hofmann T, Andrade ACDS, Silva JN, Arnaud TMS, Wohlleben W, Strauss V, Treumann S, Chaves CR, Gröters S, Landsiedel R, van Ravenzwaay B. Short term inhalation toxicity of a liquid aerosol of glutaraldehyde-coated CdS/Cd(OH)2 core shell quantum dots in rats. Toxicol Lett 2013; 225:20-6. [PMID: 24296008 DOI: 10.1016/j.toxlet.2013.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [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: 09/02/2013] [Revised: 11/04/2013] [Accepted: 11/08/2013] [Indexed: 12/29/2022]
Abstract
Quantum dots exhibit extraordinary optical and mechanical properties, and the number of their applications is increasing. In order to investigate a possible effect of coating on the inhalation toxicity of previously tested non-coated CdS/Cd(OH)2 quantum dots and translocation of these very small particles from the lungs, rats were exposed to coated quantum dots or CdCl2 aerosol (since Cd(2+) was present as impurity), 6h/d for 5 consecutive days. Cd content was determined in organs and excreta after the end of exposure and three weeks thereafter. Toxicity was determined by examination of broncho-alveolar lavage fluid and microscopic evaluation of the entire respiratory tract. There was no evidence for translocation of particles from the respiratory tract. Evidence of a minimal inflammatory process was observed by examination of broncho-alveolar lavage fluid. Microscopically, minimal to mild epithelial alteration was seen in the larynx. The effects observed with coated quantum dots, non-coated quantum dots and CdCl2 were comparable, indicating that quantum dots elicited no significant effects beyond the toxicity of the Cd(2+) ion itself. Compared to other compounds with larger particle size tested at similarly low concentrations, quantum dots caused much less pronounced toxicological effects. Therefore, the present data show that small particle sizes with corresponding high surfaces are not the only factor triggering the toxic response or translocation.
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Affiliation(s)
- L Ma-Hock
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - P M A Farias
- Research Group on Nanostructures and Biological Interfaces; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Graduate Program on Material Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - T Hofmann
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - A C D S Andrade
- Research Group on Nanostructures and Biological Interfaces; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Graduate Program on Material Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - J N Silva
- Research Group on Nanostructures and Biological Interfaces; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Graduate Program on Material Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - T M S Arnaud
- Research Group on Nanostructures and Biological Interfaces; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Graduate Program on Material Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - W Wohlleben
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; BASF SE, Material Physics, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - V Strauss
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - S Treumann
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - C R Chaves
- Research Group on Nanostructures and Biological Interfaces; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Graduate Program on Material Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - S Gröters
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - R Landsiedel
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil
| | - B van Ravenzwaay
- BASF SE, Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany; Departament of Pharmaceutical Sciences; Federal University of Pernambuco (UFPE), 50670-901 Recife, Brazil.
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11
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Faria PB, Vieira JO, Silva JN, Rodrigues AQ, Souza XR, Santos FR, Pereira AA. Performance and carcass characteristics of free-range broiler chickens fed diets containing alternative feedstuffs. Rev Bras Cienc Avic 2011. [DOI: 10.1590/s1516-635x2011000300009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Pereira SA, Passos SRL, Silva JN, Gremião IDF, Figueiredo FB, Teixeira JL, Monteiro PCF, Schubach TMP. Response to azolic antifungal agents for treating feline sporotrichosis. Vet Rec 2010; 166:290-4. [PMID: 20208075 DOI: 10.1136/vr.166.10.290] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The effectiveness and safety of treatment with ketoconazole and itraconazole were compared in 773 sporotrichosis-infected cats over a four-year period (2002 to 2005). Five hundred and ninety-eight cats received oral ketoconazole and 175 received oral itraconazole. Treatment was successful in 238 (30.8 per cent) cats, of which 171 (28.6 per cent) of 598 received 13.5 to 27.0 mg/kg/day ketoconazole and 67 (38.3 per cent) of 175 received 8.3 to 27.7 mg/kg/day itraconazole. Adverse effects were reported in 306 (39.6 per cent) of the cats, 105 (13.6 per cent) died and 430 (55.6 per cent) dropped out of treatment or were still under treatment at the time of data analysis.
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Affiliation(s)
- S A Pereira
- Instituto de Pesquisa Clínica Evandro Chagas, Fundação Oswaldo Cruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ 21040-900, Brazil.
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13
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Abstract
Flavonoids are naturally occurring plant compounds with antioxidant properties. Their consumption has been associated with the protective effects of certain diets against some of the complications of atherosclerosis. Low-density lipoprotein (LDL) oxidative modification is currently thought to be a significant event in the atherogenic process. Most of the experiments concerning the inhibition of LDL oxidation used isolated LDL. We used diluted human whole plasma to study the influence of flavonoids on lipid peroxidation (LPO) promoted by copper, and their interaction with uric acid, one of the most important plasma antioxidants. Lipid peroxidation was evaluated by the formation of thiobarbituric acid reactive substances (TBARS) and of free malondialdehyde (MDA). The comparative capability of the assayed flavonoids on copper (II) reduction was tested using the neocuproine colorimetric test. In our assay system, urate disappears and free MDA and TBARS formation increase during the incubation of plasma with copper. Most of the tested flavonoids inhibited copper-induced LPO. The inhibition of LPO by flavonoids correlated positively with their capability to reduce copper (II). The urate consumption during the incubation of plasma with copper was inhibited by myricetin, quercetin and kaempferol. The inhibition of urate degradation by flavonoids correlated positively with the inhibition of LPO. Urate inhibited the copper-induced LPO in a concentration-dependent mode. Luteolin, rutin, catechin and quercetin had an antioxidant synergy with urate. Our results show that some flavonoids could protect endogenous urate from oxidative degradation, and demonstrate an antioxidant synergy between urate and some of the flavonoids.
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Affiliation(s)
- P Filipe
- Centro de Metabolismo e Endocrinologia da Faculdade de Medicina de Lisboa, Portugal
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14
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Jennings S, Brown ND, Whitmore TC, Silva JN, Lopes JD, Baima AM. To conserve rainforest, we have to help local people live sustainably. Nature 2000; 405:507. [PMID: 10850687 DOI: 10.1038/35014661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Filipe PM, Fernandes AC, Silva JN, Freitas JP, Manso CF. [Effect of silibinin on oxidative damage of blood constituents]. C R Seances Soc Biol Fil 1998; 191:821-35. [PMID: 9587488] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Silibinin (SDH) is a flavonoid with ascertained hepatoprotective effects, which have been partially attributed to its antioxidant properties. Oxidation of blood constituents could have a role in atherogenesis and interfere with the rheologic properties of the blood. In this study we investigated, whether SDH could protect some blood constituents against oxidative modification. In human plasma we measured TBARS and fluorescence generation as indicators of copper or azobis amidinopropane hydrochloride (AAPH) at 760 mm Hg PO2-induced lipid peroxidation. SDH at 50 microM inhibited copper-induced TBARS formation by 25% and fluorescence by 47%. SDH also inhibited AAPH-induced lipid peroxidation, but at 175 microM concentration only. Oxidative modification of albumine was evaluated by fluorescence generation. SDH at 50 microM inhibited copper/hydrogen peroxide fluorescence generation by 54% and at 2.5 microM it inhibited EDTA-Fe (II)/hydrogen peroxide fluorescence generation by 31%. The protection of albumin by SDH was confirmed by SDS-PAGE electrophoresis. Copper-induced red-cell lipid peroxidation was evaluated by TBARS formation. SDH at 250 microM inhibited copper-induced lipid peroxidation and hemolysis by 45% and 94%, respectively. SDH also inhibited hemolysis in red-cell suspensions exposed to hydrogen peroxide, but not lipid peroxidation. Our results show that SDH may protect blood constituents from oxidative damage.
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Affiliation(s)
- P M Filipe
- Centro de Metabolismo e Endocrinologia, Faculdade de Medicina de Lisboa, Portugal
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16
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Minzoni MA, Alencastre MB, Goulart MC, Paciência E, Rodrigues AR, Silva JN, Carswell WA, Saeki T. [Mental health and psychiatric nursing. Quest for a concept]. Rev Enferm Nov Dimens 1977; 3:350-5. [PMID: 243943] [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: 12/14/2022]
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17
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Silva JN. [Carcinoma of the male breast. Morphological aspects]. Arq Patol 1972; 43:131-5. [PMID: 4343611] [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: 01/10/2023]
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18
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Silva JN. [Carcinoma of the female breast. Morphological aspects]. Arq Patol 1972; 43:109-20. [PMID: 4343609] [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: 01/10/2023]
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19
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Silva JN. [Carcinoma of the uterus. Anatomy and topographic relations-Pathological anatomy]. Arq Patol 1967; 39:13-6. [PMID: 5595931] [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: 01/15/2023]
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