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1.
Electron. j. biotechnol ; 43: 1-7, Jan. 2020. tab, graf, ilus
Artigo em Inglês | LILACS | ID: biblio-1087520

RESUMO

Background: Textile industry not only plays a vital role in our daily life but also a prominent factor in improving global economy. One of the environmental concern is it releases huge quantities of toxic dyes in the water leading to severe environmental pollution. Bacterial laccase and azoreductase successfully oxidize complex chemical structure of nitrogen group-containing azo dyes. Additionally, the presence of textile dye infuriates bacterial peroxidase to act as a dye degrading enzyme. Our present study deals with three textile dye degrading enzymes laccase, azoreductase, and peroxidase through analyzing their structural and functional properties using standard computational tools. Result: According to the comparative analysis of physicochemical characteristics, it was clear that laccase was mostly made up of basic amino acids whereas azoreductase and peroxidase both comprised of acidic amino acids. Higher aliphatic index ascertained the thermostability of all these three enzymes. Negative GRAVY value of the enzymes confirmed better water interaction of the enzymes. Instability index depicted that compared to laccase and preoxidase, azoreductase was more stable in nature. It was also observed that the three model proteins had more than 90% of total amino acids in the favored region of Ramachandran plot. Functional analysis revealed laccase as multicopper oxidase type enzyme and azoreductase as FMN dependent enzyme, while peroxidase consisted of α-ß barrel with additional haem group. Conclusion: Present study aims to provide knowledge on industrial dye degrading enzymes, choosing the suitable enzyme for industrial set up and to help in understanding the experimental laboratory requirements as well.


Assuntos
Compostos Azo/metabolismo , Peroxidase/química , Lacase/química , NADH NADPH Oxirredutases/química , Temperatura , Compostos Azo/química , Indústria Têxtil , Biodegradação Ambiental , Simulação por Computador , Estabilidade Enzimática , Peroxidase/metabolismo , Lactase/metabolismo , Corantes/metabolismo , NADH NADPH Oxirredutases/metabolismo
2.
Acta cir. bras ; 34(11): e201901102, Nov. 2019. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1054682

RESUMO

Abstract Purpose: To investigate the effect of Picroside II on testicular ischemia and reperfusion (l/R) injury and the underlying mechanism. Methods: Sprague-Dawley rats were randomly divided into 4 groups: sham operated group (Sham), Sham with Picroside II treatment group (Sham+ Pic II), l/R group (l/R) and l/R with Picroside II treatment group (I/R+ Pic II). l/R model was established by rotating the left testis 720° in a clock-wise direction for 4 hours. The histopathologic and spermatogenetic evaluation was performed. The apoptosis changes and the levels of HO-1 (heme oxygenase-1), MPO (myeloperoxidase), NOX (NADPH oxidase), SOD (superoxide dismutase), XO (xanthine oxidase) and NOS (nitric oxide synthase) were measured. Results: The seminiferous tubules were damaged in l/R rats, but Picroside II alleviated the changes induced by l/R. The increased level of apoptosis was decreased by Picroside II (P=0.01, 9.05±0.35 vs. 4.85±0.25). The activities of HO-1, MPO, NOX, XO and MDA content were increased and the SOD activity was decreased in l/R (P<0.05) and could be reversed by Picroside II (P=0.03, 405.5±7.5 vs. 304±17U/mgprot; P=0.02, 0.99±0.05 vs. 0.52±0.04 mgprot; P=0.01, 260+7 vs. 189±2 mgprot; P=0.04, 10.95+0.55 vs. 8.75+0.35 U/mgprot; P=0.045, 6.8+0.7 vs. 3.75+0.35 mgprot; P=0.04, 44.5+3.5 vs. 57.5+3.5 mgprot). Western blot showed that the expression of iNOS, nNOS and eNOS were increased in l/R (P<0.05); however, they were decreased after Picroside II treatment (P<0.05). Conclusion: Picroside II attenuated testicular I/R injury in rats mainly through suppressing apoptosis and oxidative stress through reduction of nitric oxide synthesis.


Assuntos
Animais , Masculino , Testículo/irrigação sanguínea , Traumatismo por Reperfusão/prevenção & controle , Cinamatos/farmacologia , Apoptose/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Glucosídeos Iridoides/farmacologia , Óxido Nítrico/biossíntese , Traumatismo por Reperfusão/metabolismo , Traumatismo por Reperfusão/patologia , Distribuição Aleatória , Western Blotting , Ratos Sprague-Dawley , Peroxidase/análise , Marcação In Situ das Extremidades Cortadas , Heme Oxigenase-1/análise , Malondialdeído/análise , NADP/análise
3.
Braz. j. biol ; 79(4): 742-748, Nov. 2019. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1001482

RESUMO

Abstract Citrus fruit production occupies a place of considerable importance in the economy of the world including Pakistan. Tristeza disease caused by Citrus Tristeza Virus (CTV) exists in various forms that may or may not cause symptoms in the plants. The bioactive compounds and antioxidants are naturally present in plants and provide a defense mechanism that is generally accelerated in response to a stress. The objective of the present study was to target and analyze the citrus plants that were CTV positive to observe the changes in the enzymatic and non-enzymatic antioxidants of citrus (Sweet Oranges only). It was observed that in response to CTV infection, both the non-enzymatic antioxidants (total flavonoid, ascorbic acid, phenolic acid) and enzymatic antioxidants (catalase, superoxide dismutase and peroxidase) activities showed an increasing trend overall. The profiling of antioxidants in response to a viral infection may help in the discovery of new biomarkers that can be used as a monitoring tool in disease management.


Resumo As frutas cítricas ocupam um lugar de considerável importância na economia do Paquistão, assim como o resto do mundo. A doença da tristeza causada pelo Vírus da Tristeza dos Citros (CTV) existe em várias formas que podem ou não apresentar sintomas nas plantas. Os compostos bioativos e antioxidantes estão naturalmente presentes nas plantas e fornecem um mecanismo de defesa que é geralmente acelerado em resposta a um estresse. O objetivo do presente estudo foi analisar as alterações causadas pelo CTV nos antioxidantes enzimáticos e não enzimáticos de laranjas doces. Foi observado que, em resposta ao ataque de CTV, os antioxidantes não enzimáticos como flavonoides totais, ácido ascórbico, ácido fenólico e antioxidantes enzimáticos, como as atividades de catalase, superóxido dismutase e peroxidase, geralmente mostram uma tendência crescente. O perfil de antioxidantes em resposta a um ataque viral pode ajudar na descoberta de novos biomarcadores que podem ser usados ​​como uma ferramenta de monitoramento no gerenciamento de doenças.


Assuntos
Doenças das Plantas/prevenção & controle , Doenças das Plantas/virologia , Closterovirus/fisiologia , Citrus sinensis/enzimologia , Citrus sinensis/química , Antioxidantes/análise , Antioxidantes/classificação , Ácido Ascórbico/análise , Flavonoides/análise , Catalase/análise , Peroxidase/análise
4.
Acta cir. bras ; 34(10): e201901004, Oct. 2019. graf
Artigo em Inglês | LILACS | ID: biblio-1054674

RESUMO

Abstract Purpose: To evaluate the effects of infliximab on the inflammation of the colonic mucosa devoid from fecal stream. Methods: Twenty-four rats were submitted to a Hartmann's procedure. They remained for 12 weeks with the fecal derivation to development of diversion colitis on excluded colorectal stump. After this period, they were divided into 3 groups: one group received intervention with saline (2.0 mL / week), other group infliximab at doses of 5 mg/kg/week and the other 10 mg/kg/week for five consecutively weeks. Concluded the intervention period, the animals were euthanized to remove colon segments with and without fecal stream. Colitis was diagnosed by histological analysis and the degree of inflammation by validated score. The neutrophilic infiltrate was evaluated by tissue expression of myeloperoxidase identified by immunohistochemical. The tissue content of myeloperoxidase was measured by computer-assisted image analysis. Results: The inflammatory score was high in colonic segments without fecal stream. The intervention with infliximab reduced the inflammatory score in excluded colonic segments. The content of myeloperoxidase was reduced in colonic segments of animals treated with infliximab mainly in high concentrations. Conclusion: Intervention with infliximab reduced the inflammation and the neutrophil infiltrate in colonic segments devoid of the fecal stream.


Assuntos
Animais , Masculino , Fármacos Gastrointestinais/farmacologia , Fator de Necrose Tumoral alfa/antagonistas & inibidores , Colite/tratamento farmacológico , Infliximab/farmacologia , Fatores de Tempo , Processamento de Imagem Assistida por Computador , Trânsito Gastrointestinal/efeitos dos fármacos , Imuno-Histoquímica , Reprodutibilidade dos Testes , Ratos Wistar , Colite/patologia , Colo/efeitos dos fármacos , Colo/patologia , Peroxidase/análise , Infiltração de Neutrófilos/efeitos dos fármacos , Fezes , Mucosa Intestinal/efeitos dos fármacos , Mucosa Intestinal/patologia
5.
Acta cir. bras ; 34(8): e201900805, 2019. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1038124

RESUMO

Abstract Purpose To investigate the effect of sevoflurane preconditioning on ischemia/reperfusion (I/R)-induced pulmonary/hepatic injury Methods Fifty-one Wistar rats were randomly grouped into sham, I/R, and sevoflurane groups. After reperfusion, the structural change of the lung was measured by Smith score, the wet and dry weights (W/D) were determined, malondialdehyde (MDA) myeloperoxidase (MPO) content was determined colorimetrically and by fluorescence, respectively, and matrix metalloprotein-9 (MMP-9) mRNA was quantified by RT-PCR. Biopsy and morphological analyses were performed on liver tissue, activities of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were determined, and tumor necrosis factor-alpha (TNF-α) level was determined. Results The sham group showed no changes in tissue structure. Structural lesions in the sevoflurane and I/R groups were mild and severe, respectively. Smith score, W/D, MDA, MPO, and MMP mRNA showed the same trend, and were increased in the I/R group and recovered in the sevoflurane group, compared with the sham group (both P<0.05). AST and ALT were significantly increased compared to the sham group (AST: 655±52.06 vs . 29±9.30 U/L; ALT: 693±75.56 vs . 37±6.71 U/L; P<0.05). In the sevoflurane group, AST and ALT levels were significantly decreased (464±47.71 and 516±78.84 U/L; P<0.001). TNF-α presented similar results. Conclusion The protection of lung and liver by sevoflurane may be mediated by inhibited leukocyte recruitment and MMP-9 secretion.


Assuntos
Animais , Masculino , Ratos , Traumatismo por Reperfusão/prevenção & controle , Anestésicos Inalatórios/uso terapêutico , Precondicionamento Isquêmico/métodos , Fígado/irrigação sanguínea , Pulmão/irrigação sanguínea , Aspartato Aminotransferases/sangue , Traumatismo por Reperfusão/tratamento farmacológico , Fator de Necrose Tumoral alfa/sangue , Peroxidase/análise , Alanina Transaminase/sangue , Modelos Animais de Doenças , Sevoflurano/uso terapêutico , Isquemia/prevenção & controle , Fígado/efeitos dos fármacos , Fígado/patologia , Pulmão/efeitos dos fármacos , Pulmão/patologia , Malondialdeído/análise
6.
Int. j. morphol ; 36(4): 1453-1462, Dec. 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-975722

RESUMO

Traumatic brain injury (TBI) can potentially lead to hemorrhages in all areas of the skull, which can damage cells and nerve connections. This study aims to investigate the protective effects of Ganoderma lucidum polysaccharides (GLPS) as a antioxidant on cerebellar cell tissues after traumatic brain injury in rats. Sprague Dawley rats were subjected to TBI with a weight-drop device using 300 g1m weight-height impact. The groups are consisted of control, trauma, and trauma+Ganoderma lucidum groups. At seven days post-brain injury, experimental rats were decapitated after intraperitoneal administration of ketamine HCL (0.15 ml/100 g body weight). Cereballar samples were taken for histological examination or determination of malondialdehyde (MDA) and glutathione (GSH) levels and myeloperoxidase (MPO) activity. Significant improvement was observed in cells and vascular structures of Ganoderma lucidum treated groups when compared to untreated groups. It is believed that Ganoderma lucidum may have an effect on the progression of traumatic brain injury. Ganoderma lucidum application may affect angiogenetic development in blood vessel endothelial cells, decrease inflammatory cell accumulation by affecting cytokine mechanism and may create apoptotic nerve cells and neuroprotective mechanism in glial cells.


La lesión cerebral traumática (LCT) puede provocar hemorragias en todas las áreas del cráneo, lo que puede dañar las células y las conexiones nerviosas. Este estudio tuvo como objetivo investigar los efectos protectores de los polisacáridos de Ganoderma lucidum (GLPS) como antioxidante en los tejidos de las células del cerebelo después de la lesión cerebral traumática en ratas. Ratas Sprague Dawley fueron sometidas a TBI con un dispositivo de caída de peso usando un impacto de peso de 300 g-1 m. Se formaron los siguientes grupos: control, trauma y trauma + Ganoderma lucidum. Siete días después de la lesión cerebral, las ratas experimentales fueron decapitadas después de la administración intraperitoneal de ketamina HCL (0,15 ml / 100 g de peso corporal). Se tomaron muestras cerebrales para el examen histológico y para la determinación de niveles de malondialdehído (MDA) y glutatión (GSH) y actividad de mieloperoxidasa (MPO). Se observó una mejora significativa en las células y las estructuras vasculares de los grupos tratados con Ganoderma lucidum en comparación con los grupos no tratados. Durante el estudio se observó que Ganoderma lucidum puede tener un efecto sobre la progresión de la lesión cerebral traumática. La aplicación de Ganoderma lucidum puede afectar el desarrollo angiogénico en las células endoteliales de los vasos sanguíneos, disminuir la acumulación de células inflamatorias al afectar el mecanismo de las citocinas y puede crear células nerviosas apoptóticas y un mecanismo neuroprotector en las células gliales.


Assuntos
Animais , Masculino , Ratos , Cerebelo/efeitos dos fármacos , Reishi/química , Lesões Encefálicas Traumáticas/patologia , Antioxidantes/farmacologia , Polissacarídeos/farmacologia , Imuno-Histoquímica , Antígenos de Diferenciação Mielomonocítica , Antígenos CD , Cerebelo/metabolismo , Cerebelo/patologia , Western Blotting , Ratos Sprague-Dawley , Peroxidase/metabolismo , Fármacos Neuroprotetores , Proteínas Proto-Oncogênicas c-bcl-2 , Fator A de Crescimento do Endotélio Vascular/metabolismo , Glutationa/análise , Malondialdeído/análise
7.
J. coloproctol. (Rio J., Impr.) ; 38(4): 275-282, Oct.-Dec. 2018. tab, graf, ilus
Artigo em Inglês | LILACS | ID: biblio-975978

RESUMO

ABSTRACT This study was done to investigate the synergistic impacts hydro extract of jujube fruit in combination with Mesalazine (orally) and Asacol (intra-colonic) administration in ameliorating animal model of ulcerative colitis (UC). After the induction of UC and with the development of signs, the treatment groups daily received the hydro extract of jujube fruit (200 mg/kg, orally, enema), Mesalazine (30 mg/kg, orally) and Asacol (10 mg/kg, enema). After 10 days, rats were euthanized and were studied. Findings indicated a significant increase in Myeloperoxidase (161.66 ± 10.40), Nitric oxide (216.01 ± 17.55), IL-6 (138.54 ± 7.02), and TNF-α (123.87 ± 9.80) colon tissue levels and pathological damage of positive control group compared with the negative control group. Hydro extract of jujube fruit in combination with Mesalazine (orally) and Asacol (intra-colonic) group represented a higher capability in significantly decreasing Myeloperoxidase (73.33 ± 9.07), Nitric oxide (81.66 ± 10.50), IL-6 (51.69 ± 5.19), TNF-α (30.59 ± 5.50) levels and pathological damage in compared with the other treatment groups. Considering accessibility and affordability of jujube fruit and the side effects of routine drugs, taking a combination of jujube fruit with low doses of routine pharmaceutical drugs can improve and cure ulcerative colitis disease.


RESUMO Este estudo foi realizado para investigar os impactos sinérgicos do extrato aquoso do fruto da jujuba em combinação com a administração de Mesalazina (por via oral) e Asacol (intracolônico) na melhora do modelo animal de colite ulcerativa. Após a indução da colite ulcerativa e com o desenvolvimento de sinais, os grupos de tratamento receberam diariamente o extrato aquoso do fruto da jujuba (200 mg/kg, via oral, enema), Mesalazina (30 mg/kg, via oral) e Asacol (10 mg/kg, enema). Após 10 dias, os ratos foram eutanasiados e estudados. Os achados indicaram um aumento significativo dos níveis de mieloperoxidase (161,66 ± 10,40), óxido nítrico (216,01 ± 17,55), IL-6 (138,54 ± 7,02) e TNF-α (123,87 ± 9,80) no tecido do cólon e dano patológico do grupo controle positivo comparado com o grupo controle negativo. O extrato aquoso da fruta de jujuba em combinação com Mesalazina (oral) e Asacol (intracolônico) representou maior capacidade de redução significativa dos níveis de mieloperoxidase (73,33 ± 9,07), óxido nítrico (81,66 ± 10,50), IL-6 (51,69 ± 5,19), TNF-α (30,59 ± 5,50) e dano patológico em comparação com os outros grupos de tratamento. Considerando a acessibilidade e disponibilidade do fruto da jujuba e dos efeitos colaterais dos medicamentos de rotina, tomar uma combinação de jujuba com baixas doses de medicamentos farmacêuticos de rotina pode melhorar e curar a colite ulcerativa.


Assuntos
Animais , Ratos , Colite Ulcerativa , Mesalamina , Ziziphus , Preparações Farmacêuticas , Interleucina-6 , Fator de Necrose Tumoral alfa , Peroxidase , Óxido Nítrico
8.
Braz. j. microbiol ; 49(3): 513-521, July-Sept. 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-951812

RESUMO

Abstract Soil salinity is an important abiotic stress worldwide, and salt-induced oxidative stress can have detrimental effects on the biological nitrogen fixation. We hypothesized that co-inoculation of cowpea plants with Bradyrhizobium and plant growth-promoting bacteria would minimize the deleterious effects of salt stress via the induction of enzymatic and non-enzymatic antioxidative protection. To test our hypothesis, cowpea seeds were inoculated with Bradyrhizobium or co-inoculated with Bradyrhizobium and plant growth-promoting bacteria and then submitted to salt stress. Afterward, the cowpea nodules were collected, and the levels of hydrogen peroxide; lipid peroxidation; total, reduced and oxidized forms of ascorbate and glutathione; and superoxide dismutase, catalase and phenol peroxidase activities were evaluated. The sodium and potassium ion concentrations were measured in shoot samples. Cowpea plants did not present significant differences in sodium and potassium levels when grown under non-saline conditions, but sodium content was strongly increased under salt stress conditions. Under non-saline and salt stress conditions, plants co-inoculated with Bradyrhizobium and Actinomadura or co-inoculated with Bradyrhizobium and Paenibacillus graminis showed lower hydrogen peroxide content in their nodules, whereas lipid peroxidation was increased by 31% in plants that were subjected to salt stress. Furthermore, cowpea nodules co-inoculated with Bradyrhizobium and plant growth-promoting bacteria and exposed to salt stress displayed significant alterations in the total, reduced and oxidized forms of ascorbate and glutathione. Inoculation with Bradyrhizobium and plant growth-promoting bacteria induced increased superoxide dismutase, catalase and phenol peroxidase activities in the nodules of cowpea plants exposed to salt stress. The catalase activity in plants co-inoculated with Bradyrhizobium and Streptomyces was 55% greater than in plants inoculated with Bradyrhizobium alone, and this value was remarkably greater than that in the other treatments. These results reinforce the beneficial effects of plant growth-promoting bacteria on the antioxidant system that detoxifies reactive oxygen species. We concluded that the combination of Bradyrhizobium and plant growth-promoting bacteria induces positive responses for coping with salt-induced oxidative stress in cowpea nodules, mainly in plants co-inoculated with Bradyrhizobium and P. graminis or co-inoculated with Bradyrhizobium and Bacillus.


Assuntos
Cloreto de Sódio/metabolismo , Bradyrhizobium/fisiologia , Inoculantes Agrícolas/fisiologia , Vigna/microbiologia , Antioxidantes/metabolismo , Proteínas de Plantas/metabolismo , Estresse Fisiológico , Superóxido Dismutase/metabolismo , Peroxidação de Lipídeos , Catalase/metabolismo , Peroxidase/metabolismo , Estresse Oxidativo , Salinidade , Vigna/crescimento & desenvolvimento , Vigna/metabolismo , Glutationa/metabolismo
9.
J. pediatr. (Rio J.) ; 94(4): 446-452, July-Aug. 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-954628

RESUMO

Abstract Objective: Melatonin has a protective role in adults with cardiovascular disease, but the effects of melatonin in children with cardiac dysfunction are not well understood. This study was designed to explore the variations in melatonin, myeloperoxidase, and caspase-3 levels in children suffering from heart failure. Methods: Seventy-two pediatric patients with heart failure and twelve healthy children were enrolled in this study. A modified Ross scoring system was used to evaluate clinical cardiac function. Patients with a score of >2 points were included in the study and were divided into three groups according to severity of heart failure: mild (score: 3-6), moderate (score: 7-9), and severe (score: 10-12). Echocardiographic parameters, laboratory data, and serum levels of melatonin, myeloperoxidase, and caspase-3 were measured and analyzed in all patients. Results: Compared with patients with mild and moderate heart failure, patients in the severe heart failure group had significantly decreased left ventricular ejection fraction (p < 0.001), and significantly increased serum melatonin levels (p = 0.013) and myeloperoxidase levels (p < 0.001). Serum melatonin levels were positively correlated with serum caspase-3 levels (p < 0.001). The optimal cutoff values of serum melatonin levels for the diagnosis of severe heart failure and primary cardiomyopathy in pediatric patients with heart failure were 54.14 pg/mL and 32.88 pg/mL, respectively. Conclusions: Serum melatonin and myeloperoxidase levels were increased in children with severe heart failure. It is likely that increasing melatonin levels may act as a compensatory mechanism in pediatric children with heart failure.


Resumo Objetivo: A melatonina possui um papel protetor em adultos com doença cardiovascular, porém os efeitos da melatonina em crianças com disfunção cardíaca não são bem entendidos. O estudo foi projetado para explorar a variação nos níveis de melatonina, mieloperoxidase e caspase 3 em crianças que sofrem de insuficiência cardíaca. Métodos: 72 pacientes pediátricos com insuficiência cardíaca e 12 crianças saudáveis foram inscritos no estudo. Um sistema de classificação de Ross modificada foi utilizado para avaliar a função cardíaca clínica. Os pacientes com escore de > 2 pontos foram incluídas no estudo e foram divididos em três grupos de acordo com a gravidade da insuficiência cardíaca: leve (escore: 3-6), moderada (escore: 7-9) e grave (escore: 10-12). Os parâmetros ecocardiográficos, dados laboratoriais e níveis séricos de melatonina, mieloperoxidase e caspase 3 foram medidos e analisados em todos os pacientes. Resultados: Em comparação com os pacientes com insuficiência cardíaca de gravidade leve e moderada, os pacientes no grupo de insuficiência cardíaca grave apresentaram redução significativa da fração de ejeção do ventrículo esquerdo (p < 0,001) e aumento significativo nos níveis séricos de melatonina (p = 0,013) e níveis de mieloperoxidase (p < 0,001). Os níveis séricos de melatonina foram positivamente correlacionados com os níveis séricos de caspase 3 (p < 0,001). Os valores de corte ideais dos níveis séricos de melatonina para diagnóstico de IC e cardiomiopatia primária em pacientes pediátricos com insuficiência cardíaca foram 54,14 pg/mL e 32,88 pg/mL, respectivamente. Conclusões: Os níveis séricos de melatonina e mieloperoxidase mostraram aumento em crianças com insuficiência cardíaca grave. Especulamos se o aumento nos níveis de melatonina pode agir como um mecanismo compensatório em crianças pediátricas com insuficiência cardíaca.


Assuntos
Humanos , Masculino , Feminino , Lactente , Pré-Escolar , Criança , Caspase 3/sangue , Insuficiência Cardíaca/sangue , Melatonina/sangue , Índice de Gravidade de Doença , Ecocardiografia , Biomarcadores/sangue , Estudos de Casos e Controles , Peroxidase/sangue , Insuficiência Cardíaca/etiologia
10.
Acta cir. bras ; 33(4): 375-385, Apr. 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-886280

RESUMO

Abstract Purpose: To investigate the effects of melatonin on antioxidant capacity, inflammation and apoptotic cell death (through expression of cleaved-caspase 3) in lung tissue samples of diabetic rats. Methods: Thirty male Sprague-Dawley rats were randomly divided into three groups. Group 1 (control group) was made up of healthy rats. Group 2 (diabetes group) received streptozotocin at a dose of 50 mg/kg/day for 5 days.Group 3 (diabetes plus melatonin group) received streptozotocin at a dose of 50 mg/kg/day for 5 days and then they received melatonin at a dose of 20 mg/kg/day between 28thand 35thdays of the study. Results: Tissue MDA and MPO levels were found to be significantly higher in diabetes group compared to control group (p<0.05) whilst administration of melatonin was found to significantly lower this increase down to normal levels (p<0.05). Bronchus associated lymphoid tissue (BALT) was more severe in diabetics whereas administration of melatonin alleviated this hyperplasia. Cleaved caspase 3 activity was severe in hyperplastic BALT in diabetic rats however in lowered down to moderate level when melatonin was administered. Conclusion: The melatonin caused an increase in antioxidant capacity and decreased the expression of cleaved-caspase 3.


Assuntos
Animais , Masculino , Diabetes Mellitus Experimental/patologia , Caspase 3/análise , Piroptose/efeitos dos fármacos , Pulmão/efeitos dos fármacos , Melatonina/farmacologia , Antioxidantes/farmacologia , Superóxido Dismutase/análise , Fatores de Tempo , Imuno-Histoquímica , Peroxidação de Lipídeos , Catalase/análise , Distribuição Aleatória , Reprodutibilidade dos Testes , Ratos Sprague-Dawley , Estreptozocina , Peroxidase/análise , Diabetes Mellitus Experimental/complicações , Diabetes Mellitus Experimental/metabolismo , Caspase 3/efeitos dos fármacos , Glutationa/análise , Pulmão/metabolismo , Pulmão/patologia , Malondialdeído/análise
11.
Int. j. morphol ; 36(1): 175-179, Mar. 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-893207

RESUMO

SUMMARY: Traumatic injury to the spinal cord results in the delayed dysfunction and neuronal death. Impaired mitochondrial function, generation of reactive oxygen species (ROS), and lipid peroxidation occur soon after traumatic spinal cord injury (SCI), while the activation of compensatory molecules that neutralize ROS occurs at later time points. The aim of the current study was to investigate the putative neuroprotective effect of Ganoderma lucidum in a rat model of SCI. In order to induce SCI, a standard weight-drop method that induced a moderately severe injury (100 g/cm force) at T10, was used. Injured animals were given either 20 mL/kg Ganoderma lucidum or saline 30 min post injury per day by gastric gavage. At seven days postinjury, rats were decapitated. Spinal cord samples were taken for histological examination or determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity. SCI caused a significant decrease in spinal cord GSH content, which was accompanied with significant increases in MDA levels, MPO activity. On the other hand, Ganoderma lucidum treatment reversed all these biochemical parameters as well as SCI-induced histopathological alterations. Furthermore, impairment of the neurological functions due to SCI was improved by meloxicam treatment. The present study suggests that Ganoderma Lucidum, reduces SCI-induced oxidative stress and exerts neuroprotection by inhibiting lipid peroxidation, GSH depletion.


RESUMEN: La lesión traumática de la médula espinal provoca disfunción retrasada y muerte neuronal. La función mitocondrial deteriorada, la generación de especies reactivas de oxígeno (ERO) y la peroxidación lipídica ocurren poco después de una lesión traumática de la médula espinal (LTE), mientras que la activación de moléculas compensatorias que neutralizan ERO ocurre posteriormente. El objetivo del presente estudio fue investigar el efecto neuroprotector de Ganoderma lucidum en un modelo de LTE en ratas. Con el fin de inducir LTE, se utilizó un método estándar de pérdida de peso que indujo una lesión moderadamente grave (100 g / cm de fuerza) a T10. A los animales lesionados se les administró 20 ml / kg de Ganoderma lucidum o solución salina, por sonda gástrica, 30 minutos después de la lesión. A los siete días después de la lesión, las ratas fueron eutanasiadas por decapitación. Se tomaron muestras de médula espinal para el examen histológico y para la determinación de los niveles de malondialdehído (MDA) y glutatión (GSH), y la actividad de mieloperoxidasa (MPO). LTE causó una disminución significativa en el contenido de GSH de la médula espinal, además de aumentos significativos en los niveles de MDA y la actividad de MPO. Por otro lado, el tratamiento con Ganoderma lucidum invirtió todos estos parámetros bioquímicos así como las alteraciones histopatológicas inducidas por LTE. El deterioro de las funciones neurológicas debidas a LTE mejoró con el tratamiento con meloxicam. El presente estudio sugiere que Ganoderma lucidum, reduce el estrés oxidativo inducido por LTE y ejerce la neuroprotección mediante la inhibición de la peroxidación de los lípidos y agotamiento del GSH.


Assuntos
Animais , Ratos , Fármacos Neuroprotetores/administração & dosagem , Reishi/química , Traumatismos da Medula Espinal/tratamento farmacológico , Glutationa/análise , Imuno-Histoquímica , Marcação In Situ das Extremidades Cortadas , Malondialdeído/análise , Estresse Oxidativo/efeitos dos fármacos , Peroxidase/efeitos dos fármacos , Ratos Sprague-Dawley , Traumatismos da Medula Espinal/patologia
12.
Electron. j. biotechnol ; 27: 63-69, May. 2017. graf
Artigo em Inglês | LILACS | ID: biblio-1010394

RESUMO

Background: Defense-related anti-oxidative response is a vital defense mechanism of plants against pathogen invasion. Ralstonia solanacearum is an important phytopathogen. Bacterial wilt caused by R. solanacearum is the most destructive disease and causes severe losses in patchouli, an important aromatic and medicinal plant in Southeast Asia. The present study evaluated the defense response of patchouli inoculated with virulent R. solanacearum. Results: Results showed that the basic enzymatic activities differed not only between the leaves and stems but also between the upper and lower parts of the same organ of patchouli. POD, SOD, PPO, and PAL enzymatic activities were significantly elevated in leaves and stems from patchouli inoculated with R. solanacearum compared to those in control. The variation magnitude and rate of POD, PPO, and PAL activities were more obvious than those of SOD in patchouli inoculated with R. solanacearum. PAGE isoenzymatic analysis showed that there were one new POD band and two new SOD bands elicited, and at least two isoformic POD bands and two SOD bands were observably intensified compared to the corresponding control. Conclusion: Our results suggest that not only defense-related enzymatic activities were elevated but also the new isoenzymatic isoforms were induced in patchouli inoculated with R. solanacearum.


Assuntos
Ralstonia solanacearum/patogenicidade , Pogostemon/enzimologia , Pogostemon/microbiologia , Fenilalanina Amônia-Liase/metabolismo , Superóxido Dismutase/metabolismo , Virulência , Catecol Oxidase/metabolismo , Peroxidase/metabolismo , Ralstonia solanacearum/fisiologia , Eletroforese em Gel de Poliacrilamida , Enzimas/imunologia , Enzimas/metabolismo , Eletroforese em Gel de Poliacrilamida Nativa , Pogostemon/imunologia , Antioxidantes
13.
Acta cir. bras ; 32(5): 376-387, May 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-837712

RESUMO

Abstract Purpose: To investigate whether modulating GSK-3β could attenuate myocardial ischemia reperfusion injury (MIRI) induced acute lung injury (ALI) and analyze the underlying mechanism. Methods: Male SD rats were subjected to MIRI with or without myocardial ischemic post-conditioning in the presence or absence of GSK-3β inhibitor. GSK-3β inhibitor was injected peritoneally 10min before MIRI. Lung W/D weight ratio, MPO, PMNs, histopathological changes, TUNEL, Bax, Bcl-2, IL-6, IL-8, IL-10, GSK-3β, and caspase-3 were evaluated in the lung tissues of all rats. Results: After MIRI, lung injury was significantly increased manifested as significant morphological changes and increased leukocytes in the interstitial capillaries, Lung W/D ratio, MPO, and PMN in BALF, which was associated with enhanced inflammation evidenced by increased expressions of IL-6, IL-8 and reduced expression of IL-10. MIRI significantly increased cell apoptosis in the lung as increased levels of apoptotosis, Bax, cleaved caspase-3, and reduced expression of Bcl-2 was observed, which was concomitant with reduced p-GSK-3β. All these changes were reversed/prevented by ischemic post-conditioning, while these beneficial effects of ischemic post-conditioning were abolished by GSK-3β inhibition. Conclusion: Myocardial ischemia reperfusion injury induces acute lung injury by induction of inflammation and cell apoptosis. Ischemic post-conditioning protects the lung from ALI following MIRI by increasing p-GSK-3β.


Assuntos
Animais , Masculino , Traumatismo por Reperfusão Miocárdica/prevenção & controle , Substâncias Protetoras/metabolismo , Lesão Pulmonar Aguda/prevenção & controle , Pós-Condicionamento Isquêmico/métodos , Glicogênio Sintase Quinase 3 beta/metabolismo , Distribuição Aleatória , Regulação para Baixo , Interleucinas/metabolismo , Ratos Sprague-Dawley , Apoptose/efeitos dos fármacos , Peroxidase/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Substâncias Protetoras/farmacologia , Marcação In Situ das Extremidades Cortadas , Modelos Animais , Ativação Enzimática , Proteína X Associada a bcl-2/metabolismo , Caspase 3/metabolismo , Lesão Pulmonar Aguda/enzimologia , Glicogênio Sintase Quinase 3 beta/antagonistas & inibidores , Glicogênio Sintase Quinase 3 beta/farmacologia , Inflamação/metabolismo , Infarto do Miocárdio/patologia , Neutrófilos/enzimologia
14.
Braz. j. med. biol. res ; 50(6): e5954, 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-839306

RESUMO

Salvianolic acid B (SAB) is one the major phytocomponents of Radix Salvia miltiorrhiza and exhibit numerous health promoting properties. The objective of the current study was to examine whether SAB exerts a renoprotective effect by attenuating oxidative stress and inflammatory response through activating phosphatidylinositol 3-kinase/serine-threonine kinase B (PI3K/Akt) signaling pathway in a renal ischemic reperfusion rat model. Forty Sprague-Dawley male rats (250–300 g) were obtained and split into four groups with ten rats in each group. The right kidney of all rats was removed (nephrectomy). The rats of the Control group received only saline (occlusion) and served as a sham control group, whereas rats subjected to ischemic reperfusion (IR) insult by clamping the left renal artery served as a postitive control group. The other 2 groups of rats were pretreated with SAB (20 and 40 mg·kg-1·day-1) for 7 days prior IR induction and served as treatment groups (SAB 20+IR; SAB 40+IR). Renal markers creatinine (Cr) and blood urea nitrogen (BUN) were significantly lower in the groups that received SAB. Pretreatment with SAB appears to attenuate oxidative stress by suppressing the production of lipid peroxidation products like malondialdehyde as well as elevating antioxidant activity. The concentration of inflammatory markers and neutrophil infiltration (myeloperoxidase) were significantly decreased. Meanwhile, PI3K protein expression and pAkt/Akt ratio were significantly upregulated upon supplementation with SAB, indicating its renoprotective activity. Taken together, these results indicate that SAB can therapeutically alleviate oxidative stress and inflammatory process via modulating PI3K/Akt signaling pathway and probably ameliorate renal function and thus act as a renoprotective agent.


Assuntos
Animais , Masculino , Benzofuranos/farmacologia , Medicamentos de Ervas Chinesas/farmacologia , Estresse Oxidativo/efeitos dos fármacos , Fosfatidilinositol 3-Quinases/metabolismo , Substâncias Protetoras/farmacologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Traumatismo por Reperfusão/tratamento farmacológico , Nitrogênio da Ureia Sanguínea , Creatinina/metabolismo , Inflamação/metabolismo , Rim/patologia , Peroxidação de Lipídeos/efeitos dos fármacos , Peroxidase/efeitos dos fármacos , Ratos Sprague-Dawley , Traumatismo por Reperfusão/metabolismo , Transdução de Sinais
15.
São Paulo; s.n; s.n; 2017. 151p p. ilus, graf, tab.
Tese em Português | LILACS | ID: biblio-849414

RESUMO

O hidroperóxido de urato (HOOU) é o produto da oxidação do ácido úrico por peroxidases. Sua produção é favorecida durante a inflamação e hiperuricemia, uma vez que há grande quantidade de ácido úrico, peroxidases inflamatórias e superóxido. Neste sentido, o objetivo deste estudo foi avaliar o efeito do hidroperóxido de urato sobre proteínas sensíveis à modulação redox em um ambiente inflamatório asséptico e outro que imita infecção. Assim, nesta tese comparou-se a estrutura química do HOOU obtido fotoquimicamente daquele obtido através da catálise enzimática pela mieloperoxidase. A obtenção do HOOU por foto-oxidação permitiu o melhor isolamento do composto. Este oxidante foi capaz de reagir especificamente com os aminoácidos contendo enxofre (metionina e cisteína). Neste sentido, foi investigada sua reatividade com tiol-peroxidases detoxificadoras de peróxido, a peroxiredoxina 1 e 2 (Prx1 e Prx2). O HOOU apresentou cinética rápida de reação com a Prx1, k = 4,9 × 105 M-1s-1 e Prx2, k = 2,3 × 106 M-1s-1, o que as torna um provável alvo celular, além disso, foi capaz de oxidar a Prx2 de eritrócitos humanos, mostrando ser capaz de atravessar a membrana plasmática. Além das Prxs, a albumina do soro também desempenha papel importante na homeostase redox. O HOOU foi capaz de oxidar a albumina com constante de velocidade de 0,2 × 102 M-1s- 1. Outra tiol-proteína com importante função na homeostase e sinalização redox é a tioredoxina (Trx). A Trx foi oxidada pelo HOOU com constante de reação de 2,8 × 102 M-1s-1 e foi liberada juntamente com a Prx1 e Prx2 das células de macrófagos humanos (linhagem THP-1) quando estas células foram incubadas com HOOU. A liberação dessas proteínas é reconhecidamente um sinal de estresse celular. Assim o HOOU pode estar envolvido na exacerbação do estresse oxidativo em ambiente inflamatório. Quando neutrófilos (linhagem HL- 60) e macrófagos humanos (linhagem THP-1) foram incubados na presença de ácido úrico e Pseudomonas aeruginosa houve uma diminuição na produção de ácido hipocloroso (HOCl). Isto se deveu à competição entre ácido úrico e cloreto pela mieloperoxidase e resultou em menor atividade microbicida pelas células, demonstrando que a formação do HOOU não contribui e, ao contrário, prejudica a atividade microbicida das células inflamatórias. Dessa forma, a oxidação do ácido úrico e formação do hidroperóxido de urato tanto altera a atividade microbicida das células inflamtárias, quanto leva à oxidação de tiósproteínas importantes para manutenção da homeostase redox. Assim, o HOOU pode ser o responsável pelos efeitos pró-oxidantes e pró-inflamatórios do ácido úrico solúvel, e isso indica que o papel antioxidante do ácido úrico deve ser revisto em situações de inflamação.


Urate hydroperoxide (HOOU) is the product of the oxidation of uric acid by peroxidases. The formation of HOOU is favored during inflammation and in hyperuricemia, where there is plenty amount of uric acid, inflammatory peroxidases and superoxide. Therefore, the aim of the present study was to evaluate the effect of urate hydroperoxide on redox sensitive proteins in an inflammatory environment and another that mimics infection. In this thesis the chemical structure of the HOOU produced by photo-oxidation was compared to that obtained by myeloperoxidase catalysis. The chemical production of HOOU allowed a better purification of the compound. This oxidant was able to specifically react with sulfur containing amino acids (methionine and cysteine). In this sense, its reactivity with peroxiredoxins (Prx1 and Prx2) was investigated. HOOU reacted fast with Prx1 k = 4.9 × 105 M-1s-1 and Prx2 k = 2.3 × 106 M-1s-1. In addition, HOOU was able to oxidize Prx2 from intact erythrocytes at the same extend as does hydrogen peroxide. Albumin is an important thiol-containing protein to redox homeostasis in plasma. HOOU was able to oxidize albumin with a rate constant of 0.2 × 102 M-1s-1. Another protein with important function in redox homeostasis is thioredoxin (Trx). Trx was oxidized by HOOU with a rate constant of 2.8 × 102 M-1s-1 and was released together with Prx1 and Prx2 from human macrophages cells (THP-1 cell line) that were incubated with HOOU. The release of these proteins is a signal of cellular stress. Thus, HOOU may be involved in the exacerbation of oxidative stress in inflammatory environments. When neutrophil (HL-60 cell line) and macrophages (THP-1 cell line) were incubated with uric acid and Pseudomonas aeruginosa there was a decrease in hypochlorous acid (HOCl) production because of the competition between chloride and uric acid by myeloperoxidase. It decreased HOCl and impaired the microbicidal activity of the cells, showing that HOOU does not contribute in bacteria clearance. Therefore, the oxidation of uric acid to urate hydroperoxide impairs microbicidal activity and oxidizes thiol-proteins in inflammatory cells contributing to a pro-oxidant status. In this context, the antioxidant role of uric acid in inflammatory response should be reviwed.


Assuntos
Humanos , Animais , Masculino , Feminino , Bovinos , Espécies Reativas de Oxigênio/efeitos adversos , Ácido Úrico/efeitos da radiação , Albuminas , Peroxidase , Tiorredoxinas
16.
Braz. j. oral sci ; 15(3)July-Sept. 2016. ilus
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-875096

RESUMO

This study aimed to evaluate clinical, microbiological and immunological parameters in type 2 diabetes mellitus (DM) in comparison with normoglycemic patients (NDM). Glycemic and lipid profiles and periodontal clinical status were determined for thirty-three patients (17 DM and 16 NDM). The presence of periodontopathogens and species of Candida in subgingival sites were determined by polymerase chain reaction and immunological parameters by ELISA assays. All glycemic and clinical parameters evaluated were higher in the DM group, with statistical difference for fasting glucose, glycated-hemoglobin, and periodontal parameters. Lipid profile (except triglycerides), levels of TNF-α and myeloperoxidase and the prevalence of the tested microorganisms were similar between the groups, except for Candida albicans and Candida glabrata, which was higher in the DM group. In conclusion, although microbiological and immunological parameters were similar in the DM and NDM groups, periodontitis and the levels of some species of Candida were more severe in DM patients. (AU)


Assuntos
Humanos , Masculino , Feminino , Periodontite Crônica , Diabetes Mellitus Tipo 2 , Doenças Periodontais , Peroxidase , Fator de Necrose Tumoral alfa , Candida , Ensaio de Imunoadsorção Enzimática , Periodontite , Reação em Cadeia da Polimerase
17.
Braz. j. biol ; 76(2): 428-434, Apr.-June 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-781392

RESUMO

Abstract The antioxidant and anticandidal activities of leaves obtained from Camellia sinensis by non-fermentation (green and white teas), semi-fermentation (red tea) and fermentation method (black tea) were investigated. It was evaluated the total phenolic content by Folin-Ciocalteau assay; antioxidant capacities were evaluated in vitro using DPPH and ABTS radicals, hypochlorous acid and superoxide anion scavenger assays, induced hemolysis, lipid peroxidation by conjugated diene formation and myeloperoxidase activity. Anticandidal activity was performed on three strains of Candida spp. The results showed that non-fermented teas have a higher concentration of phenolic compounds, and then presented the best inhibitory activity of AAPH-induced hemolysis, the best inhibition of conjugated diene formation and more pronounced antioxidant activity in all tests. The highest anticandidal activity was obtained from fermented tea, followed by non-fermented tea. These results indicate that the antioxidant activity demonstrated has no direct relation with the anticandidal activity.


Resumo A atividade antioxidante e antifúngica das folhas obtidas da Camellia sinensis pelos métodos de não-fermentação (chás verde e branco), semi-fermentação (chá vermelho) e fermentação (chá preto) foram investigadas. Foi avaliado o conteúdo total de compostos fenólicos pelo método de Folin-Ciocalteau; a capacidade antioxidante foi avaliada in vitro usando os radicais artificiais DPPH e ABTS, o ácido hipocloroso, ensaios do ânion superóxido, hemólise induzida, peroxidação lipídica por formação de dienos conjugados e atividade da Mieloperoxidase. A atividade antifúngica foi obtida sobre três cepas de Candida spp. Os resultados obtidos mostram que os chás não fermentados apresentam a maior concentração de compostos fenólicos e também, apresentam a melhor atividade inibitória, sobre hemólise induzida por APPH, sobre a formação de dienos conjugados e a mais pronunciada atividade antioxidante sobre todos os testes. A maior atividade antifúngica foi obtida pelo chá fermentado, seguido pelo semi-fermentado e não-fermentados. Os resultados obtidos demonstram que a atividade antioxidante observada não apresenta relação com a atividade antifúngica.


Assuntos
Folhas de Planta/química , Camellia sinensis/química , Antifúngicos/farmacologia , Antioxidantes/farmacologia , Oxirredução , Fenóis/análise , Chá/química , Extratos Vegetais , Peroxidação de Lipídeos , Peroxidase/metabolismo , Fermentação , Hemólise , Antifúngicos/análise , Antioxidantes/análise
18.
Acta cir. bras ; 31(6): 417-421, tab
Artigo em Inglês | LILACS | ID: lil-785013

RESUMO

ABSTRACT PURPOSE: To evaluate the effect of Otostegia persica (O. persica) extract on renal damage induced by ischemia/reperfusion (I/R) in diabetic rats. METHODS: Forty-eight rats were subjected to right nephrectomy; then, they were allocated into six groups: Sham; Diabetic sham; I/R; Diabetic I/R; I/R+O. persica; Diabetic I/R+O. persica. Diabetes was induced by streptozotocin (200 mg/kg, i.p.). O. persica (300 mg/kg/day, p.o) was administered for 2 weeks. On the 15th day, ischemia was induced in left kidney for 60 min, followed by reperfusion for 24h. Renal functional and biochemical markers were estimated. RESULTS: I/R in both normal and diabetic rats, induced a significant elevation in serum levels of urea and creatinine (p<0.05). Renal I/R induced a significant increase of malondialdehyde, myeloperoxidase and nitric oxide concentrations associated with significant reduction in superoxide dismutase and catalase activities in comparison with the sham group (p<0.05). Diabetic rats that underwent renal I/R exhibited a significant increase in all the studied parameters with a reduction in the antioxidant enzymes as compared to nondiabetic rats (p<0.05). These deleterious effects associated with renal I/R were improved by the treatment with O. persica (p<0.05). CONCLUSION: Otostegia persica pretreatment protected the renal injury from ischemia-reperfusion in diabetic rats.


Assuntos
Animais , Masculino , Extratos Vegetais/farmacologia , Traumatismo por Reperfusão/complicações , Lamiaceae , Diabetes Mellitus Experimental/complicações , Antioxidantes/farmacologia , Superóxido Dismutase/metabolismo , Ureia/sangue , Glicemia/efeitos dos fármacos , Traumatismo por Reperfusão/metabolismo , Catalase/metabolismo , Ratos Wistar , Peroxidase/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Creatinina/sangue , Modelos Animais , Hipoglicemiantes/farmacologia , Rim/efeitos dos fármacos , Peróxidos Lipídicos/metabolismo , Nefrectomia/efeitos adversos
19.
Acta cir. bras ; 31(6): 411-416, tab, graf
Artigo em Inglês | LILACS | ID: lil-785016

RESUMO

ABSTRACT PURPOSE: To investigate the protective effect of metformin on testicular ischemia/reperfusion (I/R) injury in rats. METHODS: Eighteen adult male Wistar rats were randomly divided into three experimental groups (n=6), as follows: Sham, I/R, and Metformin. 1-hour ischemia was induced by the left testicular artery and vein clipping followed by 7 days of reperfusion. Metformin (100 mg/kg) was administrated orally for 7 days via oral gavage after ischemic period. At the end of trial, the left testis was removed for histological analysis and oxidative stress measurement. RESULTS: I/R reduced superoxide dismutase (SOD) activities and testicular Johnsen's scores accompanied by an elevation in malondialdehyde (MDA) and myeloperoxidase (MPO) levels in comparison with the sham group (P < 0.05). Compared to I/R group, metformin restored testicular Johnsen's scores, SOD activity, MDA and MPO levels (P < 0.05). CONCLUSION: Metformin has a protective effect against I/R injury on the testis.


Assuntos
Animais , Masculino , Testículo/irrigação sanguínea , Traumatismo por Reperfusão/prevenção & controle , Substâncias Protetoras/farmacologia , Metformina/farmacologia , Superóxido Dismutase/metabolismo , Testículo/metabolismo , Traumatismo por Reperfusão/metabolismo , Distribuição Aleatória , Ratos Wistar , Peroxidase/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Modelos Animais , Malondialdeído/metabolismo
20.
J. appl. oral sci ; 24(3): 271-277, graf
Artigo em Inglês | LILACS | ID: lil-787548

RESUMO

ABSTRACT Sesquiterpene lactones (SLs) are the active constituents of a variety of medicinal plants used in traditional medicine for the treatment of inflammatory diseases and other ailments. Objective In this study, we evaluated whether budlein A modulates the activation of innate and adaptive immune cells such as neutrophils and lymphocytes. Material and Methods Our research group has investigated several plant species and several compounds have been isolated, identified, and their medical potential evaluated. Budlein A is a SL isolated from the species Aldama buddlejiformis and A. robusta (Asteraceae) and shows anti-inflammatory and anti-nociceptive activities. Advances in understanding how plant-derived substances modulate the activation of innate and adaptive immune cells have led to the development of new therapies for human diseases. Results Budlein A inhibited MPO activity, IL-6, CXCL8, IL-10, and IL-12 production and induces neutrophil apoptosis. In contrast, budlein A inhibited lymphocyte proliferation and IL-2, IL-10, TGF-β, and IFN-γ production, but it did not lead to cell death. Conclusions Collectively, our results indicate that budlein A shows distinct immunomodulatory effects on immune cells.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Sesquiterpenos/farmacologia , Linfócitos T/efeitos dos fármacos , Lactonas/farmacologia , Anti-Inflamatórios/farmacologia , Neutrófilos/efeitos dos fármacos , Ensaio de Imunoadsorção Enzimática , Fatores de Crescimento Transformadores/análise , Fatores de Crescimento Transformadores/efeitos dos fármacos , Células Cultivadas , Reprodutibilidade dos Testes , Análise de Variância , Interleucina-8/análise , Interleucina-8/efeitos dos fármacos , Interleucinas/análise , Apoptose/efeitos dos fármacos , Peroxidase/análise , Peroxidase/efeitos dos fármacos , Asteraceae/química , Proliferação de Células/efeitos dos fármacos , Citometria de Fluxo
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