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1.
An Acad Bras Cienc ; 92(1): e20180596, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32267305

RESUMO

Red cabbage (Brassica oleracea L. var. capitata f. rubra DC.) extract has been demonstrated hypolipidemic and antioxidant capacity. Herein, we investigated the effect of red cabbage aqueous extract (RC) or fenofibrate (FF) in oxidative stress induced by Triton WR-1339 in rats. The antioxidant capacity was evaluated through the superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities and, thiobarbituric reactive species (TBARS) and protein carbonyl (PC) levels in erythrocytes, liver, kidneys, cerebral cortex and hippocampus of male rats. The alterations promoted by Triton WR-1339 in enzymatic antioxidant defense in the liver, kidneys and hippocampus were reversed by RC or FF treatments. The TBARS and PC levels increased in the liver, cerebral cortex and hippocampus of hyperlipidemic rats were decreased by the treatments with RC or FF. These findings demonstrated that RC is a potential therapy to treat diseases not only involving dyslipidemic condition but also oxidative stress.


Assuntos
Antioxidantes/farmacologia , Brassica/química , Peroxidação de Lipídeos/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Animais , Catalase/efeitos dos fármacos , Glutationa Peroxidase/efeitos dos fármacos , Masculino , Oxirredução , Ratos , Ratos Wistar , Superóxido Dismutase , Substâncias Reativas com Ácido Tiobarbitúrico
2.
Ann Hematol ; 99(5): 937-945, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32166377

RESUMO

Hydroxyurea (HU) is used as a therapy in sickle cell anemia (SCA). Many studies have established that HU improves patient quality of life by reducing symptoms. However, the effect of HU on erythrocytes is not well-described. We evaluated several parameters related to oxidative stress and total lipid content of erythrocytes in patients with SCA. The patient cohort consisted of 7 SCA patients treated with HU, 17 untreated SCA patients, and 15 healthy subjects. Erythrocytes from patients with SCA displayed increased oxidative stress relative to the control group, including higher thiobarbituric acid reactive substances (TBARS), Fe3+ content, and osmotic fragility, and decreased total cholesterol. We observed that treatment of SCA patients with HU increased Fe3+ content and activity of glutathione peroxidase, and decreased glutathione reductase activity, glutathione levels, total cholesterol, and phospholipid content comaperaded to patients untreated with HU. Thus, HU alters biochemical characteristics of erythrocytes; future studies will determine whether they are beneficial or not.


Assuntos
Anemia Falciforme , Eritrócitos Anormais/metabolismo , Hidroxiureia/administração & dosagem , Estresse Oxidativo/efeitos dos fármacos , Adulto , Anemia Falciforme/sangue , Anemia Falciforme/tratamento farmacológico , Colesterol/sangue , Feminino , Humanos , Masculino , Fragilidade Osmótica/efeitos dos fármacos , Fosfolipídeos/sangue , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
3.
Acta Cir Bras ; 34(12): e201901204, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32074166

RESUMO

PURPOSE: To examine the therapeutic effect of external adenosine on an acetic acid-induced acute ulcerative colitis model in rats. METHODS: Thirty male mature rats were divided into three groups as control, acute colitis (AC) and AC+adenosine group (AC+AD). AC was induced by rectal administration of 4% acetic acid (AA). 5mg/kg/day adenosine was performed i.p for 4 weeks to AC+AD group. Rectum and colon were excised for microscopic and histopathological histopathologic evaluations, and immunohistochemical analysis of nuclear factor kappa B (NF-kB). Blood samples were collected for biochemical detection of TNF-α, Pentraxin-3 and malondialdehyde (MDA) levels. RESULTS: AC group had generalized hyperemia and hemorrhage with increased macroscopic and histopathological scores compared with control (P <0.0001) while adenosine treatment decreased these scores significantly (P <0.001), with reduced distribution of disrupted epithelium, leukocyte infiltrates, and focal hemorrhage. AC group showed significantly increased immunoexpression of NF-kB in rectum, plasma and tissue levels of TNF-α, plasma Pentraxin-3 and MDA levels (P <0.0001) while adenosine reduced these levels (P < 0.05). CONCLUSION: Adenosine appears to promote healing of colon and rectum exposed to AA-induced AC, suggesting a boosting effect of adenosine on the intestinal immune system to cure ulcerative colitis.


Assuntos
Adenosina/uso terapêutico , Anti-Inflamatórios/uso terapêutico , Colite Ulcerativa/tratamento farmacológico , Ácido Acético , Doença Aguda , Animais , Proteína C-Reativa/análise , Colite Ulcerativa/induzido quimicamente , Colite Ulcerativa/patologia , Colo/patologia , Ensaio de Imunoadsorção Enzimática , Imuno-Histoquímica , Masculino , Malondialdeído/sangue , NF-kappa B/análise , Ratos Sprague-Dawley , Reto/patologia , Valores de Referência , Reprodutibilidade dos Testes , Componente Amiloide P Sérico/análise , Substâncias Reativas com Ácido Tiobarbitúrico , Fatores de Tempo , Resultado do Tratamento , Fator de Necrose Tumoral alfa/análise
4.
Ecotoxicol Environ Saf ; 193: 110341, 2020 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-32092582

RESUMO

An in-situ experiment was performed to study metabolic responses of the freshwater mussel Diplodon chilensis to water contaminated by leachates from an open dump and cattle activity, in order to analyze both the effects of those contaminants on aquatic environments and the potential use of a native bivalve to evaluate the effects of anthropic influence and eutrophication. Bivalves from a reference site were cage-transplanted to a control site (site A) and to a temporal water pond (site B) over 30 and 60 periods. Water quality analyses revealed that the site B was affected by anthropogenic influence. Mussel's hemocytes from site B showed 50% lower reactive oxygen species production and 130% higher lysosomal membrane stability in the site B mussels. In addition, no oxidative stress was evident in gills, despite the elevated copper and iron concentrations recorded in the site B water samples (CuB = 0.3350 ± 0.0636 mg. L-1vs. CuA = 0.0045 ± 0.0007 mg. L-1; FeB = 3.8650 ± 0.4031 mg. L-1vs. FeA = 0.0365 ± 0.0049 mg. L-1). In contrast, the adductor muscle accumulated more Fe (~10-20-fold) than the gills and showed signs of oxidative stress, e.g. superoxide dismutase activity and TBARS levels were increased by 10% were 34%, respectively, in the site B compared with the site A after 60 days of exposure. Additionally, the adductor muscle showed signs of anaerobic metabolism activation. Cu is accumulated in gills from both sites' individuals, at 60 days, in concordance with the increase in the activity of the cu-containing enzyme cytochrome-c-oxidase. There was a reduction in the overall condition and digestive gland index in bivalves exposed at site B, associated with diminished levels of lipid and protein contents. Metal-pollution and eutrophication affects D. chilensis metabolism and is associated to tissue-specific exposure, anaerobic metabolism and general energetic condition depletion.


Assuntos
Bivalves/efeitos dos fármacos , Eutrofização , Metais Pesados/toxicidade , Poluentes Químicos da Água/toxicidade , Animais , Bivalves/enzimologia , Bivalves/metabolismo , Bovinos , Cobre/metabolismo , Água Doce , Brânquias/efeitos dos fármacos , Brânquias/metabolismo , Hemócitos/efeitos dos fármacos , Hemócitos/metabolismo , Metais Pesados/metabolismo , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Superóxido Dismutase/metabolismo , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo , Poluentes Químicos da Água/metabolismo , Qualidade da Água
5.
Am J Physiol Renal Physiol ; 318(2): F509-F517, 2020 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-31904280

RESUMO

Endothelial dysfunction, characterized by reduced bioavailability of nitric oxide and increased oxidative stress, is a hallmark characteristic in diabetes and diabetic nephropathy (DN). High levels of asymmetric dimethylarginine (ADMA) are observed in several diseases including DN and are a strong prognostic marker for cardiovascular events in patients with diabetes and end-stage renal disease. ADMA, an endogenous endothelial nitric oxide synthase (NOS3) inhibitor, is selectively metabolized by dimethylarginine dimethylaminohydrolase (DDAH). Low DDAH levels have been associated with cardiac and renal dysfunction, but its effects on DN are unknown. We hypothesized that enhanced renal DDAH-1 expression would improve DN by reducing ADMA and restoring NOS3 levels. DBA/2J mice injected with multiple low doses of vehicle or streptozotocin were subsequently injected intrarenally with adenovirus expressing DDAH-1 (Ad-h-DDAH-1) or vector control [Ad-green fluorescent protein (GFP)], and mice were followed for 6 wk. Diabetes was associated with increased kidney ADMA and reduced kidney DDAH activity and DDAH-1 expression but had no effect on kidney DDAH-2 expression. Ad-GFP-treated diabetic mice showed significant increases in albuminuria, histological changes, glomerular macrophage recruitment, inflammatory cytokine and fibrotic markers, kidney ADMA levels, and urinary thiobarbituric acid reactive substances excretion as an indicator of oxidative stress, along with a significant reduction in kidney DDAH activity and kidney NOS3 mRNA compared with normal mice. In contrast, Ad-h-DDAH-1 treatment of diabetic mice reversed these effects. These data indicate, for the first time, that DDAH-1 mediates renal tissue protection in DN via the ADMA-NOS3-interaction. Enhanced renal DDAH-1 activity could be a novel therapeutic tool for treating patients with diabetes.


Assuntos
Adenoviridae/genética , Amidoidrolases/biossíntese , Arginina/análogos & derivados , Diabetes Mellitus Experimental/terapia , Nefropatias Diabéticas/prevenção & controle , Terapia Genética , Vetores Genéticos , Rim/enzimologia , Albuminúria/enzimologia , Albuminúria/genética , Albuminúria/prevenção & controle , Amidoidrolases/genética , Animais , Arginina/metabolismo , Citocinas/genética , Citocinas/metabolismo , Diabetes Mellitus Experimental/complicações , Diabetes Mellitus Experimental/enzimologia , Diabetes Mellitus Experimental/genética , Nefropatias Diabéticas/enzimologia , Nefropatias Diabéticas/etiologia , Nefropatias Diabéticas/genética , Fibrose , Mediadores da Inflamação/metabolismo , Rim/patologia , Masculino , Camundongos Endogâmicos DBA , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo III/genética , Óxido Nítrico Sintase Tipo III/metabolismo , Estresse Oxidativo , Transdução de Sinais , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
6.
Food Chem ; 313: 126139, 2020 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-31927203

RESUMO

Based on various antioxidant mechanisms, four kinds of antioxidants including ascorbyl palmitate (AP), vitamin E (VE), phytic acid (PA) and one of the polyphenols (antioxidant of bamboo leaves, tea polyphenol palmitate or tea polyphenols (TP)) were used in combination to improve oxidative stability of docosahexaenoic acid (DHA) algae oil. To achieve the best effect, the formulations and mixture ratios of the antioxidant combinations were optimized. The effects were monitored by peroxide value, thiobarbituric acid-reactive substances, acid value, free radicals, Rancimat induction time and fatty acid composition of DHA algae oil undergoing accelerated storage. Finally, the DHA algae oil containing 80 mg/kg AP, 80 mg/kg VE, 40 mg/kg PA and 80 mg/kg TP had the highest oxidative stability. Furthermore, the shelf life of DHA algae oil containing the optimum composite antioxidant was predicted by using accelerated shelf life testing coupled with Arrhenius model, which was 3.80-fold longer than the control sample.


Assuntos
Antioxidantes/química , Ácidos Docosa-Hexaenoicos/química , Óleos/química , Ácido Ascórbico/análogos & derivados , Ácido Ascórbico/química , Armazenamento de Alimentos , Oxirredução , Folhas de Planta/química , Polifenóis/química , Sasa/química , Chá/química , Substâncias Reativas com Ácido Tiobarbitúrico/química , Vitamina E/química
7.
Biosci Biotechnol Biochem ; 84(3): 621-632, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31762379

RESUMO

The antioxidant activity of Petasites japonicus flower buds cultivated in Tokushima, Japan, was examined in vitro and in vivo. The flower bud extracts were assayed using either oxygen radical absorbance capacity or 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Antioxidants in the 80% ethanol extract were investigated using online high-performance liquid chromatography-DPPH and were identified as caffeic acid, 3-O-caffeoylquinic acid, fukinolic acid, 3,4-di-O-caffeoylquinic acid, 3,5-di-O-caffeoylquinic acid, and 4,5-di-O-caffeoylquinic acid using liquid chromatography-mass spectrometry. Fukinolic acid was the most active compound based on its activity and abundance. Administering the extracts orally to ICR mice prior to iron injection significantly suppressed plasma thiobarbituric acid reactive substance (TBARS) production. Moreover, TBARS and triglyceride concentrations in the plasma of C57BL/6 mice fed with a high fat diet were also significantly decreased by the extract. The results suggest that antioxidative compounds in P. japonicus can be used in the management of oxidative stress.


Assuntos
Antioxidantes/farmacologia , Flores/química , Petasites/química , Extratos Vegetais/farmacologia , Animais , Cromatografia Líquida de Alta Pressão/métodos , Técnicas In Vitro , Masculino , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos ICR , Estresse Oxidativo/efeitos dos fármacos , Espectrometria de Massas em Tandem , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
8.
Food Chem Toxicol ; 135: 110931, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31678486

RESUMO

This study evaluated the heterocyclic aromatic amine (HAA) contents and quality characteristics of seven kinds of traditional smoked and roasted poultry products on the northern Chinese market. Harbin smoked chicken had the most abundant total HAAs, followed by Haroulian roasted chicken and Yishou smoked chicken. The contents of Norharman and Harman were much higher than those of other kinds of HAAs (P < 0.05). The water content of samples varied from 59.01% to 69.98% and the water activity varied from 0.953 to 0.976. The carbonyl content and TBARS values of the Beijing roasted duck and the Duiqing roasted goose were much higher than those of the other samples (P < 0.05). The sensory evaluation result of the Beijing roasted chicken was higher than that of the other samples (P < 0.05). Overall, the levels of HAAs in the industrial smoked and roasted products were lower than those in non-industrial products, which may provide a theoretical basis for the industrial production of smoked and roasted poultry products.


Assuntos
Aminas/análise , Qualidade dos Alimentos , Compostos Heterocíclicos com 2 Anéis/análise , Compostos Heterocíclicos com 3 Anéis/análise , Produtos Avícolas/análise , Animais , Galinhas , China , Culinária , Patos , Gansos , Análise de Componente Principal , Substâncias Reativas com Ácido Tiobarbitúrico/análise
9.
Food Chem Toxicol ; 135: 111038, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31825855

RESUMO

The aim of the study was to evaluate the potential protective role of sildenafil and tadalafil in contrast-induced nephropathy (CIN) by modulating oxidative stress. Thirty Wistar male rats were equally assigned into five groups: sham, CIN, CIN + sildenafil (10 mg/kg bw/day), CIN + tadalafil (5 mg/kg bw/day) and CIN + N-Acetyl Cysteine (NAC) (100 mg/kg bw/day) as a positive control. CIN was induced by 12 h dehydration and administration of indomethacin (10 mg/kg bw), N-ω- nitro-L-arginine methyl ester (10 mg/kg bw), and iopromide (3 g/kg bw iodine). Blood was drawn prior to and 24 h after CIN induction for evaluating renal function and oxidative stress. In the CIN group, total antioxidant capacity (TAC), reduced glutathione (GSH) and catalase (CAT) levels were significantly decreased; and protein carbonyl (PROTC) and thiobarbituric reactive species (TBARS) were significantly increased compared to the sham group. Pre- Sildenafil and tadalafil pre-treatment reduced CIN risk and reversed oxidative stress almost to the sham group levels. These results suggest that PDE5Is can be good candidates for preventing CIN based on their ability to modulate the oxidant/antioxidant balance.


Assuntos
Antioxidantes/metabolismo , Meios de Contraste/efeitos adversos , Nefropatias/induzido quimicamente , Nefropatias/prevenção & controle , Oxidantes/metabolismo , Inibidores da Fosfodiesterase 5/farmacologia , Citrato de Sildenafila/farmacologia , Tadalafila/farmacologia , Acetilcisteína/administração & dosagem , Animais , Catalase/metabolismo , Modelos Animais de Doenças , Glutationa/metabolismo , Nefropatias/enzimologia , Nefropatias/metabolismo , Masculino , Camundongos , Estresse Oxidativo , Ratos , Ratos Wistar , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
10.
J Sci Food Agric ; 100(1): 410-420, 2020 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-31599968

RESUMO

BACKGROUND: The present research aimed to evaluate the nutritional, technological, microstructural and sensory characteristics of bologna sausages made with pork fat replaced with Echium oil. Three different treatments were processed, all of them with approximately 35% less sodium than a regular bologna-type sausage: Control (only pork backfat addition) and T25 and T50 (replacement of 25 and 50% of the added animal fat with Echium oil respectively). RESULTS: Proximate composition, texture profile analysis, fatty acid profile and microstructure were evaluated to characterize the products. In refrigerated storage, the following characteristics were assessed: thiobarbituric acid-reactive substances (TBARS) index, objective color, pH value, microbiological counts and sensory acceptance. Both samples with Echium oil (T25 and T50) showed a healthier lipid profile, with high omega-3 content, mainly from α-linolenic and stearidonic fatty acids, consequently presenting better (P ≤ 0.05) values of nutritional indices than the Control. However, the replacement of 50% animal fat with Echium oil negatively affected (P ≤ 0.05) most of the technological characteristics and the sensory acceptance of bolognas. In contrast, the treatment with 25% replacement did not show significant differences in most of the evaluated parameters compared with the Control sample. CONCLUSION: Thus the replacement of 25% of pork backfat with Echium oil in bologna sausages can be recommended, representing a good balance between nutritional gains and sensory impairment. © 2019 Society of Chemical Industry.


Assuntos
Echium/química , Substitutos da Gordura/análise , Produtos da Carne/análise , Óleos Vegetais/análise , Sódio/análise , Animais , Cor , Ácidos Graxos Ômega-3/análise , Manipulação de Alimentos , Humanos , Valor Nutritivo , Suínos , Paladar , Substâncias Reativas com Ácido Tiobarbitúrico/análise
11.
Meat Sci ; 160: 107946, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31622902

RESUMO

Studies examining the effects of feeding lipid oxidation products (LOPs) to pigs on pork quality and storage stability have mostly focused on refrigerated storage and produced mixed results. We investigated the effects of adding yellow grease, containing commercially relevant levels of LOPs, to swine diets on quality and storage stability of ground salted pork. Twenty-four domestic pigs were divided into three study groups and fed the following diet regimens for five months: (1) Standard Diet (STD), (2) STD + yellow grease (YG, high LOPs), or (3) STD + corn oil (CO, negligible LOPs). Post-harvest carcass characteristics and the effects of frozen and refrigerated storage on color and lipid oxidation of salted pork patties were studied. While feeding of yellow grease had no impact on color, it increased the susceptibility of pork patties to lipid oxidation during storage (186% and 73% higher accumulation of LOPs in patties from pigs fed STD + YG when compared to those fed STD and STD + CO, respectively).


Assuntos
Ração Animal/análise , Armazenamento de Alimentos , Produtos da Carne/análise , Carne de Porco/análise , Fenômenos Fisiológicos da Nutrição Animal , Animais , Dieta/veterinária , Feminino , Metabolismo dos Lipídeos , Peroxidação de Lipídeos , Masculino , Oxirredução , Sus scrofa/metabolismo , Substâncias Reativas com Ácido Tiobarbitúrico/análise
12.
Food Chem ; 303: 125368, 2020 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-31445174

RESUMO

The effect of eight cold-resistant yeast strains (J3, J7, J8, J9, J12, J15, J18, and J25) of Wickerhamomyces anomalus on the lipid oxidation of cold stored fish mince (4 °C) were investigated. And the metabolites of these yeast were determined with gas chromatography-mass spectrometry. These strains could effectively inhibit the increase of hydroperoxides value (p < 0.05), and the inhibiting rate was positively correlated with the content of isolongifolene, xylitol, turanose, thymol-glucoside, and uridine. Especially, the J3, J7, J8, J9, J12, and J18 could eliminate a large part of thiobarbituric acid reactive substances (TBARS) (p < 0.05), the eliminating rate was proportionate to the aldehyde dehydrogenase activity. Several bacteriostatic metabolites were detected: thymol-glucoside, 2-phenylethanol, cedro, and 2,4-bis (1,1-dimethylethyl) phenol. In addition, W. anomalus produced many metabolites with fruit and floral notes. In conclusion, cold-resistant W. anomalus strains own antioxidant activity were potential new bio-preservatives in the cold storage of muscle products.


Assuntos
Antioxidantes/análise , Saccharomycetales/química , Alimentos Marinhos/microbiologia , Oxirredução , Substâncias Reativas com Ácido Tiobarbitúrico/análise , Compostos Orgânicos Voláteis
13.
Ecotoxicol Environ Saf ; 190: 110071, 2020 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-31841896

RESUMO

Aquatic environments are affected by the use of pesticides in agricultural areas near rivers. To assess the impact of pesticide residues on affected environments Danio rerio (zebrafish) embryos have become an alternative model for biomonitoring studies. In the present study, zebrafish embryos were used as bioindicator of water quality in the Vacacaí river, located in the city of Santa Maria, southern Brazil. We hypothesized that it would be possible to observe changes in the biomarkers tested in the embryos. Exposures were performed over a total of eight months during the year 2018 using water collected in a river located near agricultural areas. Twenty-four pesticides were found in river water samples. The most frequently found were atrazine, quinclorac and clomazone. During exposure (96 h) spontaneous movement, the heart rate and hatching rate were evaluated. After the exposure time the embryos were euthanized for biochemical assays. We analyzed biomarkers such as thiobarbituric acid reactive substance (TBARS), acetylcholinesterase (AChE), glutathione S-transferase (GST) and catalase (CAT). We observed increases in GST and TBARS, especially during periods of major water contamination such as January, February, October, and November. Pesticides can affect the development of native species that reproduce during periods of high agricultural production. These results demonstrate the potential use of biochemical parameters combined with developmental and behavioral analyses in zebrafish embryos for biomonitoring studies.


Assuntos
Praguicidas/análise , Rios/química , Poluentes Químicos da Água/análise , Acetilcolinesterase/metabolismo , Agricultura , Animais , Biomarcadores/metabolismo , Brasil , Catalase/metabolismo , Embrião não Mamífero/fisiologia , Glutationa Transferase/metabolismo , Frequência Cardíaca , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo , Peixe-Zebra/embriologia , Peixe-Zebra/fisiologia
14.
Int J Nanomedicine ; 14: 8943-8959, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31819411

RESUMO

Objective: The study was designed to investigate the therapeutic potential of lactobionic acid (LA) conjugated quercetin (Q) loaded organically modified silica nanoparticles (LA-Q-ORMOSIL) with bulk quercetin to mitigate cyclophosphamide (CP) induced liver injury. Methodology: Q-ORMOSIL nanoparticles were synthesized and characterized using UV-Vis spectroscopy, TEM, Zeta sizer, FTIR and EDX. Further, encapsulation efficiency and in vitro release kinetic study was done. Q-ORMOSIL nanoparticles surface were modified with lactobionic acid, a ligand for the asialoglycoprotein receptor on the hepatocyte surface. The hepatoprotective effects of Q-ORMOSIL and LA-Q-ORMOSIL nanoparticles were evaluated in vivo. Cyclophosphamide (20 mg/kg/day, i.p) was co-administered for seven days with bulk quercetin (50mg/kg/day) and quercetin nanoparticles (50µg/kg/day). After seven days, the number of biomarkers for liver function test and oxidative stress were determined in liver homogenate. Histopathological changes were also analyzed in control and treated liver tissues. Results: Physiochemical characterization of LA-Q-ORMOSIL nanoparticles depicts that the particles formed were of approx. 80 nm, spherical, monodispersed in nature and showed sustain drug release in in vitro study. Our results further suggested that Q-ORMOSIL and LA-Q-ORMOSIL nanoparticles significantly decreased tissue TBARS, ROS levels and ALT, AST, and ALP activities compared to CP induced group. On the other hand, tissue antioxidant levels (GSH, GST, and catalase) showed a significant increase in LA-Q-ORMOSIL treated group compared to the CP treated group confirming its high therapeutic efficacy during liver injury. Conclusion: Targeted nanoquercetin demonstrated a significant hepatoprotective effect compared to bulk quercetin against CP-induced hepatotoxicity and it considerably reduced bulk quercetin dose level to many folds. Bulk quercetin has low bioavailability and thus, from obtained data we suggest that LA-Q-ORMOSIL nanoparticles provide high therapeutic value in protecting experimental animals against CP-induced liver injury. We also propose multifunctional dye-doped LA-modified ORMOSIL nanoparticles for future studies in facilitating nanoparticles uptake to hepatocytes for liver diagnosis and treatment.


Assuntos
Ciclofosfamida/efeitos adversos , Dissacarídeos/química , Fígado/patologia , Nanopartículas/química , Quercetina/farmacologia , Dióxido de Silício/química , Alanina Transaminase/metabolismo , Fosfatase Alcalina/metabolismo , Animais , Antioxidantes/farmacologia , Aspartato Aminotransferases/metabolismo , Catalase/metabolismo , Liberação Controlada de Fármacos , Cinética , Fígado/efeitos dos fármacos , Masculino , Nanopartículas/ultraestrutura , Estresse Oxidativo/efeitos dos fármacos , Tamanho da Partícula , Ratos Wistar , Espécies Reativas de Oxigênio/metabolismo , Espectrofotometria Ultravioleta , Espectroscopia de Infravermelho com Transformada de Fourier , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
15.
Environ Int ; 133(Pt A): 105118, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31610369

RESUMO

The aim was to evaluate the associations of environmental phenol and paraben concentrations with the oxidative microenvironment in adipose tissue. This study was conducted in a subsample (n = 144) of the GraMo cohort (Southern Spain). Concentrations of 9 phenols and 7 parabens, and levels of oxidative stress biomarkers were quantified in adipose tissue. Associations were estimated using multivariable linear regression analyses adjusted for potential confounders. Benzophenone-3 (BP-3) concentration was borderline associated with enhanced glutathione peroxidase (GPx) activity [exp(ß) = 1.20, p = 0.060] and decreased levels of reduced glutathione (GSH) [exp(ß) = 0.55, p = 0.070]. Concentrations of bisphenol A (BPA) and methylparaben (MeP) were associated to lower glutathione reductase (GRd) activity [exp(ß) = 0.83, exp(ß) = 0.72, respectively], and BPA was borderline associated to increased levels of oxidized glutathione (GSSG) [exp(ß) = 1.73, p-value = 0.062]. MeP was inversely associated to both hemeoxygenase-1 (HO-1) and superoxide dismustase (SOD) activity, as well as to the levels of thiobarbituric acid reactive substances (TBARS) [0.75 < exp(ß) < 0.79]. Our results suggest that some specific non-persistent pollutants may be associated with a disruption of the activity of relevant antioxidant enzymes, in addition to the depletion of the glutathione stock. They might act as a tissue-specific source of free radicals, contributing to the oxidative microenvironment in the adipose tissue.


Assuntos
Tecido Adiposo/metabolismo , Poluentes Ambientais/metabolismo , Fenóis/metabolismo , Adulto , Antioxidantes/metabolismo , Compostos Benzidrílicos/metabolismo , Benzofenonas/metabolismo , Biomarcadores/metabolismo , Estudos de Coortes , Feminino , Radicais Livres/metabolismo , Glutationa/metabolismo , Glutationa Peroxidase , Humanos , Masculino , Pessoa de Meia-Idade , Oxirredução , Estresse Oxidativo , Parabenos/metabolismo , Espanha , Substâncias Reativas com Ácido Tiobarbitúrico
16.
Environ Sci Pollut Res Int ; 26(31): 32476-32487, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31617135

RESUMO

Particulate matter (PM) contains different chemical substances that have been associated with health effects and an increased risk of mortality due to their toxicity. In this study, fine particulate matter (PM2.5) samples were collected in a region with rural characteristics (Seropédica (Se)) and another with some industries (Duque de Caxias (DC)) (Brazil, RJ). Rats were exposed to PM2.5 extracts daily for 25 days at different dilutions: 10×, 5×, and a concentrated solution (CS). Biochemical analyses were investigated for total antioxidant capacity (ACAP), lipid peroxidation (LPO) levels, reduced glutathione (GSH) concentration, activity of glutamate cysteine ligase (GCL), and activity of glutathione S-transferase (GST). The liver showed a significant increase in GCL (DC-5×, DC-CS and Se-CS) and GST activities (DC-CS and Se-CS) in both regions when compared to the control group. In the renal cortex, GCL activity decreased in most of the tested groups while GST activity increased only in the 5× groups of both regions (DC and Se). In the renal medulla, GCL activity decreased for Se-10× and DC-CS but increased for Se-5×, and GST activity increased in the Se-10×, DC-5×, and DC-CS groups. Lung GCL increased in all groups for both regions. Moreover, this organ also showed an increase in GST activity when higher metal concentrations were present (5× and CS). TBARS levels were increased for all tissues in most tested concentrations. These data indicate that soluble compounds (e.g., metals) from PM2.5 sampled in areas with different pollution indexes can change the redox status and cause damage to different tissues.


Assuntos
Antioxidantes/metabolismo , Glutationa/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Fígado/efeitos dos fármacos , Pulmão/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Material Particulado/metabolismo , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo , Animais , Glutamato-Cisteína Ligase , Glutationa Transferase/metabolismo , Metais/química , Material Particulado/química , Ratos , Substâncias Reativas com Ácido Tiobarbitúrico/química
17.
Plant Physiol Biochem ; 144: 445-454, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31645011

RESUMO

In this study, antioxidant and antimicrobial activities of basil (Ocimum basilicum L.) essential oil (EO) in response to different Fe sources (Fe-arginine, Fe-glycine, and Fe-histidine nano-complexes and Fe-EDDHA) were examined. EO samples were predominantly constituted by the phenylpropanoid methyl chavicol (53-89.5%). Application of Fe nano-complexes significantly increased the occurrence and concentration of sesquiterpenes, while decreased the content of oxygenated monoterpenes. Antioxidant activity of basil EOs was evaluated using free radical 2,2-diphenyl-1-picrylhydrazyl, Nitric oxide, H2O2 and Thiobarbituric acid reactive substances scavenging assays, and in all assays the highest and the lowest activities were recorded in basils supplied with Fe-histidine nano-complex (1.02, 1.62, 2.21, 3.22 mg mL-1) and control (3.89, 4.89, 5.52, 6.79 mg mL-1), respectively. Fe-histidine nano-complex was the most effective treatment to inhibit fungal (C. albicans: 0.058 mg mL-1; A. niger: 0.066 mg mL-1), Gram-negative (E. coli: 0.181 mg mL-1; S. typhimurium: 0.163 mg mL-1) and Gram-positive (B. subtilis: 0.033 mg mL-1; S. aureus: 0.002 mg mL-1) growth. In conclusion, application of iron nano-complexes significantly altered biological and pharmacological characteristics of basil EOs. Our results are quite encouraging since EOs exhibited potent antioxidant effect and antimicrobial activities.


Assuntos
Antioxidantes/metabolismo , Ferro/metabolismo , Ocimum basilicum/metabolismo , Peróxido de Hidrogênio/metabolismo , Nanopartículas/química , Óleos Voláteis/metabolismo , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
18.
Adv Exp Med Biol ; 1222: 27-35, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31559568

RESUMO

Oxidative stress underlies both obstructive sleep apnea (OSA) and atherosclerosis. The aim of the study was to assess the markers of oxidative stress in plasma at different stages of OSA in non-smoking obese Caucasian males aged 41-60, with normal oral glucose tolerance test. All patients were subjected to clinical and polysomnographic examinations. The stage of OSA severity was set according to the following criteria of the apnea-hypopnea index (AHI): AHI < 5/h - no disease (OSA-0; n = 26), AHI 5-15/h - mild disease (OSA-1; n = 26), AHI 16-30/h - moderate disease (OSA-2: n = 27), and AHI > 30/h obstructive episodes per hour - severe disease (OSA-3; n = 27). Plasma total antioxidant status (TAS) and thiobarbituric acid-reacting substances (TBARS), reflecting the level of lipid peroxides, were determined spectrophotometrically. We found that TAS decreased and TBARS increased significantly from OSA-0 to OSA-3. We conclude that the oxidative stress markers are conducive to setting the severity of OSA in normoglycemic patients.


Assuntos
Biomarcadores/sangue , Obesidade , Estresse Oxidativo/fisiologia , Apneia Obstrutiva do Sono/sangue , Adulto , Antioxidantes/análise , Teste de Tolerância a Glucose , Humanos , Peróxidos Lipídicos/análise , Masculino , Pessoa de Meia-Idade , Polissonografia , Índice de Gravidade de Doença , Espectrofotometria , Substâncias Reativas com Ácido Tiobarbitúrico/análise
19.
Toxicol Lett ; 317: 24-44, 2019 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-31541690

RESUMO

Exposure of humans to xenobiotic mixtures is a continuous state during their everyday routine. However, the majority of toxicological studies assess the in vivo effects of individual substances rather than mixtures. Therefore, our main objective was to evaluate the impact of the 12- and 18-month exposure of rats to a mixture containing 13 pesticides, food, and life-style additives in three dosage levels (i.e. 0.0025 × NOAEL, 0.01 × NOAEL, and 0.05 × NOAEL), on redox biomarkers in blood and tissues. Our results indicate that the exposure to the mixture induces physiological adaptations by enhancing the blood antioxidant mechanism (i.e., increased glutathione, catalase and total antioxidant capacity and decreased protein carbonyls and TBARS) at 12 months of exposure. On the contrary, exposure to the 0.05 × NOAEL dose for 18 months induces significant perturbations in blood and tissue redox profile (i.e., increased carbonyls and TBARS). This study simulates a scenario of real-life risk exposure to mixtures of xenobiotics through a long-term low-dose administration regimen in rats. The results obtained could support, at least in part, the necessity of introducing testing of combined stimuli at reference doses and long term for the evaluation of the risk from exposure to chemicals.


Assuntos
Aditivos Alimentares/toxicidade , Estresse Oxidativo/efeitos dos fármacos , Praguicidas/toxicidade , Xenobióticos/toxicidade , Animais , Biomarcadores/sangue , Catalase/sangue , Relação Dose-Resposta a Droga , Exposição Ambiental/efeitos adversos , Feminino , Glutationa/sangue , Masculino , Nível de Efeito Adverso não Observado , Oxirredução , Carbonilação Proteica/efeitos dos fármacos , Ratos Sprague-Dawley , Medição de Risco , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo , Fatores de Tempo
20.
Plant Foods Hum Nutr ; 74(4): 495-500, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31482387

RESUMO

The aim of the present study was to evaluate the clinical effects and antioxidant potential of spray-dried yerba mate extract (SDME) capsules in healthy individuals. Fourteen healthy volunteers consumed three capsules of SDME three times daily. Measurements were carried out at the baseline and after 7, 30, and 60 days of SDME capsules intake. Electrocardiogram, hematological, urinary, and biochemical parameters analyzed remained within the normal values during all the study. SDME capsules ingestion increased significantly serum antioxidant capacity (after 7 and 30 days) and reduced glutathione values (after 7 and 60 days), and the superoxide dismutase (after 7, 30, and 60 days), catalase (after 7 and 30 days), and paraoxonase-1 activities (after 7 days); and decreased lipid hydroperoxides (after 30 and 60 days) and thiobarbituric acid reactive substances levels (after 7 and 30 days). No change was observed for glutathione peroxidase activity after SDME capsules intake. The present study showed that SDME capsules ingestion by healthy individuals did not promote clinical changes and promoted an increase of antioxidant biomarkers with a concomitant decrease of lipid peroxidation biomarkers in a short and prolonged manner.


Assuntos
Ilex paraguariensis , Antioxidantes , Cápsulas , Catalase , Humanos , Extratos Vegetais , Substâncias Reativas com Ácido Tiobarbitúrico
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