Base de dados : LILACS
Pesquisa : D03.633.100.103 [Categoria DeCS]
Referências encontradas : 108 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 11 ir para página                         

  1 / 108 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1092219
Autor: Palma, Adalid; Matamoros, Gabriela; Escobar, Denis; Sánchez, Ana Lourdes; Fontecha, Gustavo.
Título: Absence of mutations associated with resistance to benzimidazole in the beta-tubulin gene of Ascaris suum
Fonte: Rev. Soc. Bras. Med. Trop;53:e20190155, 2020. tab, graf.
Idioma: en.
Resumo: Abstract INTRODUCTION: Benzimidazoles are commonly used for the control of veterinary nematodes. Resistance to benzimidazoles has been associated with three single nucleotide polymorphisms in the β-tubulin gene of common nematodes. However, these mutations are infrequent in the genus Ascaris spp. METHODS: In order to determine mutations associated with benzimidazole resistance in Ascaris suum, worms were collected from slaughtered pigs and a partial region of the β-tubulin gene was sequenced. RESULTS: All parasites showed the wildtype genotype for codons 167, 198, and 200 of the β-tubulin gene. CONCLUSIONS: This is the first report of genetic sequences associated with benzimidazole resistance in A. suum.
Descritores: Benzimidazóis/farmacologia
Resistência a Medicamentos/genética
Ascaris suum/efeitos dos fármacos
Ascaris suum/genética
Mutação
-Suínos
Tubulina (Proteína)/farmacologia
Polimorfismo de Nucleotídeo Único
Genótipo
Limites: Animais
Responsável: BR1.1 - BIREME


  2 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1132221
Autor: Duran, Gülay Gülbol; Küçük, Meral Urhan; Algül, Öztekin; Terzi, Menderes Yusuf.
Título: Investigation of New Benzimidazole Derivative Compounds Effects on A549 Cell Line
Fonte: Braz. arch. biol. technol;63:e20190364, 2020. tab, graf.
Idioma: en.
Projeto: Hatay Mustafa Kemal University Scientific Research Projects Funding.
Resumo: Abstract Chronic inflammation is a common indication of several diseases, e.g. asthma, chronic obstructive pulmonary disease (COPD), atherosclerosis, etc. Benzimidazole derivatives are preferable compounds to design new analgesic and anti-inflammatory substances due to their unique biological features. We aimed to investigate the effect of a newly synthesized benzimidazole derivative, ORT-83, on A549 human lung adenocarcinoma cell line. ORT-83 was synthesized, and a non-cytotoxic concentration of ORT-83 on A549 cells was detected with MTT assay. To analyze the anti-inflammatory effect of ORT-83, an inflammatory cell culture model was established by stimulating A549 cell line with IL1-β (10 ng/ml). After 2 hours of treatment with IL1-β to induce inflammation, A549 cells were exposed to ORT-83 (0.78 µg/ml) for 24 hours. Thereafter gene expression analyses were performed with qRT-PCR. We found that ORT-83 significantly suppressed the gene expression levels of the proinflammatory cytokines; IL-6, NFkB, and TNF-α. However, the increased levels of IL-10 (2.8 folds) by IL-1β induction did not change after ORT-83 and/or dexamethasone (Dex: positive control) treatments. While Dex; a COX-2 inhibitor, reduced the COX-2 expression level in inflammatory cells from 10.03 folds to 0.71 folds, ORT-83 reduced its level to 4.37 folds. iNOS expression levels did not change in any experimental groups. In conclusion, we showed that ORT-83 exerted its anti-inflammatory effects by repressing the gene expression of proinflammatory cytokines in the inflammation-induced A549 cell line. Although ORT-83 had a weaker COX-2 inhibitory effect compared to Dex, it was shown to be still a strong anti-inflammatory compound.
Descritores: Benzimidazóis/farmacologia
Drogas em Investigação
Analgésicos/farmacologia
Anti-Inflamatórios/farmacologia
-Sobrevivência Celular/efeitos dos fármacos
Testes de Toxicidade
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Células A549
Limites: Humanos
Responsável: BR1.1 - BIREME


  3 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-887222
Autor: Rezaee-Zavareh, Mohammad Saeid; Hesamizadeh, Khashayar; Behnava, Bita; Alavian, Seyed Moayed; Gholami-Fesharaki, Mohammad; Sharafi, Heidar.
Título: Combination of Ledipasvir and Sofosbuvir for Treatment of Hepatitis C Virus Genotype 1 Infection: Systematic Review and Meta-Analysis
Fonte: Ann. hepatol;16(2):188-197, Mar.-Apr. 2017. tab, graf.
Idioma: en.
Resumo: ABSTRACT Background and aim. The combination of Sofosbuvir (SOF) and Ledipasvir (LDV) has been lead to considerable enhancement of treatment of hepatitis C virus (HCV) genotype 1 infection. A meta-analysis of the currently available studies was undertaken with the aim to evaluate the antiviral efficacy of SOF/LDV therapy for 12 or 24 weeks with or without Ribavirin (RBV) in patients with HCV genotype 1 infection. Material and methods. In this meta-analysis, we searched databases including PubMed, Scopus, Science Direct and Web of Science using appropriate keywords. All papers which evaluated the efficacy of combination therapy of SOF/LDV with or without RBV for 12 or 24 weeks among patients with HCV genotype 1 infection were included. Results. The 20 published articles were assessed for eligibility and finally 10 articles pooling 2248 participants were included in this meta-analysis. Pooled SVR12 for four SOF/LDV regimens were 95% (95%CI = 93%-97%) for 12 weeks of treatment with SOF/LDV, 97% (95%CI = 95%-98%) for 24 weeks of treatment with SOF/LDV, 96% (95%CI = 94%-97%) for 12 weeks of treatment with SOF/ LDV/RBV and 98% (95%CI = 97%-99%) for 24 weeks of treatment with SOF/LDV/RBV. Only in treatment regimen of SOF/LDV for 12 weeks, cirrhosis had a significant effect on the SVR12 (OR = 0.21, 95%CI = 0.07-0.66). Furthermore, NS5A resistance-associated substitutions at baseline were associated with decrease in the rate of SVR (OR = 0.31, 95%CI = 0.2-0.5). Conclusions. The Interferon-free regimen of SOF/LDV for 12 or 24 weeks with or without RBV is highly effective for treatment of patients with HCV genotype 1 infection.
Descritores: Antivirais/uso terapêutico
Benzimidazóis/uso terapêutico
Hepatite C/tratamento farmacológico
Hepacivirus/efeitos dos fármacos
Fluorenos/uso terapêutico
Sofosbuvir/uso terapêutico
-Antivirais/efeitos adversos
Ribavirina/uso terapêutico
Fatores de Tempo
Benzimidazóis/efeitos adversos
Distribuição de Qui-Quadrado
Razão de Chances
Resultado do Tratamento
Hepatite C/diagnóstico
Hepatite C/virologia
Hepacivirus/genética
Quimioterapia Combinada
Fluorenos/efeitos adversos
Sofosbuvir/efeitos adversos
Resposta Viral Sustentada
Genótipo
Limites: Humanos
Responsável: BR1.1 - BIREME


  4 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Texto completo
Id: biblio-887241
Autor: Vinaixa, Carmen; Berenguer, Marina.
Título: Persistence of Virologic Response after Liver Transplant in Hepatitis C Patients Treated with Ledipasvir/Sofosbuvir Plus Ribavirin Pretransplant
Fonte: Ann. hepatol;16(3):322-323, May.-Jun. 2017.
Idioma: en.
Projeto: Instituto de Salud Carlos III.
Descritores: Hepatite C
Hepacivirus
-Ribavirina
Benzimidazóis
Fluorenos
Sofosbuvir
Limites: Humanos
Responsável: BR1.1 - BIREME


  5 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1147777
Autor: Belardo, María Alejandra; Gelin, Marina.
Título: Sexualidad y climaterio: una mirada integral / Sexuality and climacteric: a comprehensive approach
Fonte: Rev. Hosp. Ital. B. Aires (2004);36(1):19-28, mar. 2016. graf, ilus, tab.
Idioma: es.
Resumo: Cuando hablamos de sexualidad humana debemos saber que estamos hablando de una compleja y cambiante interacción de factores biológicos y socioemocionales altamente influenciables por la familia, la religión y los patrones culturales. Esto se ve en los hombres y en las mujeres, especialmente en las mujeres. La sexualidad es un concepto intuitivo que cuesta definir. Según la Organización Mundial de la Salud, se define salud sexual como "un estado de bienestar físico, emocional, mental y social relacionado con la sexualidad, la cual no es solamente la ausencia de enfermedad, disfunción o incapacidad". Es una definición que tiene en cuenta varios conceptos, muy importantes todos ellos. La respuesta sexual consiste en una serie de cambios neurofisiológicos, hemodinámicos y hormonales que involucran al conjunto del organismo. Si bien es similar en ambos sexos, en las mujeres no siempre el inicio y la progresión se correlacionan en forma sistemática o lineal como en los hombres. Y de ese intrigante devenir de la respuesta sexual femenina surge la dificultad del diagnóstico de la "disfunción sexual femenina". Podríamos resumirla en "un conjunto de trastornos en los que los problemas fisiológicos o psicológicos dificultan la participación o la satisfacción en las actividades sexuales; lo cual se traduce en la incapacidad de una persona para participar en una relación sexual de la forma que le gustaría hacerlo"16. La menopausia es percibida por muchas mujeres como el fin de la sexualidad, y no solo como el fin de la vida reproductiva. Si bien es cierto que en esta etapa la actividad sexual suele declinar y puede verse afectada por una serie de factores hormonales, psicológicos y socioculturales, para la mayoría de las mujeres la sexualidad sigue siendo importante. Debemos comprender que la disfunción sexual femenina, en cualquier etapa de la vida, es multicausal y multidimensional. A la hora de realizar el abordaje de una paciente, debemos tener en cuenta todos los factores involucrados y saber con qué herramientas contamos. El abordaje terapéutico clásicamente incluye la terapia psicológica y la terapia hormonal. Sin embargo, recientemente se ha incorporado una nueva droga recientemente aprobada por la FDA de los Estados Unidos para el tratamiento del deseo sexual hipoactivo en la mujer: el flibanserín, un psicofármaco que actúa a nivel de mediadores del deseo sexual en el sistema nervioso central, favoreciéndolo. (AU)

When we talk about human sexuality, we know that we are talking about a complex and changing interaction between biological and socioemotional factors, which are highly influenced by society, family, religion and cultural norms. This can be seen in men and women especially in women. Sexuality is an intuitive concept difficult to define. According to the World Health Organization, it is defined as "A state of physical, emotional, mental and social well being related to sexuality, which is not merely the absence of disease, dysfunction or disabilityˮ. It is a definition that takes into account several concepts, all very important. Sexual response is a series of neurophysiological, hemodynamic and hormonal changes involving the whole body. While similar in both sexes, women are not always the onset and progression correlate systematically or linearly as in men. And that intriguing evolution of the female sexual response, the difficulty of diagnosis of "female sexual dysfunctionˮ. We could summarize it in "a group of disorders in which the physiological or psychological problems impede participation or satisfaction in sexual activities; which results in the inability of a person to participate in a sexual relationship the way she or he would like to do itˮ16. Menopause is perceived by many women as to the end of sexuality, not only as the end of reproductive life. Sexual activity declines with age, and may be affected by a number of hormonal, psychological and sociocultural factors, but, for most women it continues to be important. We must understand that female sexual dysfunction, at any stage of life is multicausal and multidimensional. When approaching a patient, it is important to know all the factors that are involved, and which tools we have for deal with it. Classically, the therapeutic approach has consisted of psychological therapy and hormone therapy. However, we have to consider a recently approved drug by the FDA for the treatment of hypoactive sexual desire in women: Flibanserin. It is a psychotropic substance that acts on the mediators of sexual desire on the central nervous system favoring it. (AU)
Descritores: Climatério/fisiologia
Disfunções Sexuais Psicogênicas/tratamento farmacológico
-Qualidade de Vida
Esteroides/administração & dosagem
Testosterona/administração & dosagem
Benzimidazóis/administração & dosagem
Climatério/psicologia
Menopausa/fisiologia
Menopausa/psicologia
Sulfato de Desidroepiandrosterona/uso terapêutico
Sexualidade/fisiologia
Sexualidade/psicologia
Disfunções Sexuais Psicogênicas/fisiopatologia
Disfunções Sexuais Psicogênicas/terapia
Estrogênios/uso terapêutico
Saúde Sexual/estatística & dados numéricos
Assexualidade
Antidepressivos/uso terapêutico
Limites: Humanos
Feminino
Pessoa de Meia-Idade
Idoso
Idoso de 80 Anos ou mais
Tipo de Publ: Revisão
Responsável: AR2.1 - Biblioteca Central


  6 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Lemes, Vera R. R
Id: lil-402214
Autor: Lemes, Vera R. R; Kussumi, Tereza A; Rocha, Sônia O. B.
Título: Monitoramento de resíduos de agrotóxicos em leite consumido pela população do estado de São Paulo, Brasil, 2000 e 2002 / Monitoring of pesticide residues in milk consumed by the population of the State of São Paulo, Brazil, 2000 and 2002
Fonte: Rev. Inst. Adolfo Lutz;63(1):24-30, jan.-jun. 2004. tab, graf.
Idioma: pt.
Resumo: O leite é um importante constituinte da dieta alimentar do homem e apresenta um consumo elevado, principalmente pela população infantil. Os resíduos de agrotóxicos não intencionais e seus metabólitos podem ser encontrados no leite em decorrência do consumo de água, pastagens e rações com resíduos pelo gado ou pelo uso de agrotóxicos para controle de ectoparasitas. Com o objetivo de avaliar os níveis desses resíduos foram analisadas 73 amostras de leite, coletadas pela Vigilância Sanitária em diversos estabelecimentos comerciais do Estado de São Paulo nos anos de 2000 a 2002. A análise dos agrotóxicos foi efetuada por cromatografia a gás e cromatografia a líquido de alta eficiência. Para verificar a exatidão e precisão do método foram realizados estudos de recuperaçoes cujos resultados variaram de 71 a 105%, todos dentro dos limites aceitáveis, com coeficientes de variações entre 1,2 e 17,8%. O limite de quantificação do método foi de 0,01 mg/kg para hexaclorobenzeno, a HCH, B HCH, y HCH, aldrin, heptacloro, heptacloro epóxido, endosulfan I, endosulfan II, sulfato de endosulfan, dieldrin, endrin, pp'DDE, pp'DDD, op'DDT, pp'DDT; 0,02 mg/kg para cialotrina, a cipermetrina, deltametrina e 0,10 mg/kg para carbendazim e tiabendazol. Nenhum dos agrotóxicos avaliados foram encontrados na amostras de leite analisadas
Descritores: Contaminação de Alimentos
Cromatografia
Qualidade dos Alimentos
Resíduos Perigosos
Substâncias Perigosas
-Benzimidazóis
Inseticidas Organoclorados
Leite/toxicidade
Limites: Humanos
Masculino
Feminino
Responsável: BR91.2 - Centro de Documentação


  7 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Teixeira, Mauro Martins
Texto completo
Id: biblio-893744
Autor: Baracho, Nilo César do Vale; Silveira, Kátia Daniela da; Rocha, Natália Pessoa; Cordeiro, Thiago Macedo; Feracin, Victor; Pereira, Regina Maria; Reis, Marconi Augusto Aguiar dos; Teixeira, Mauro Martins; Silva, Ana Cristina Simões e.
Título: Urinary cytokine profiles according to the site of blockade of the renin-angiotensin system in nephrectomized rats / Perfil de citocinas urinárias de acordo com o local de bloqueio do sistema renina angiotensina em ratos nefrectomizados
Fonte: J. bras. nefrol;39(2):108-118, Apr.-June 2017. tab, graf.
Idioma: en.
Projeto: Conselho Nacional de Desenvolvimento Científico e Tecnológico; . Fundação de Amparo à Pesquisa do Estado de Minas Gerais.
Resumo: Abstract Introduction: It is still unknown how the pharmacological inhibition of the Renin Angiotensin System (RAS) impacts the levels of inflammation and fibrosis biomarkers. Objective: This study sought to evaluate the effect of enalapril, candesartan and aliskiren on urinary levels of cytokines in a model of chronic kidney disease (CKD). Methods: Male Wistar rats were submitted to surgical removal of ¾ of renal parenchyma to induce CKD (¾ nephrectomy), or subjected to sham surgery (control). Animals were then randomized into five groups: Sham surgery receiving vehicle; ¾ Nephrectomy receiving vehicle; ¾ Nephrectomy receiving enalapril (10 mg/kg); ¾ Nephrectomy receiving candesartan (10 mg/kg) and ¾ Nephrectomy receiving aliskiren (10 mg/kg). Urine output, water intake, mean arterial pressure (MAP) and urinary concentrations of creatinine, urea, albuminuria, Na+, K+, interleukin (IL) -1β, IL-6, IL-10 and transforming growth factor beta (TGF-β) were measured. Results: Nephrectomy significantly impaired renal function, increased MAP and altered the levels of all evaluated cytokines in urine. Enalapril, candesartan and aliskiren improved renal function and decreased MAP and IL-6 when compared to vehicle-treated nephrectomized group. Candesartan and aliskiren decreased IL-1β, while only candesartan reduced TGF-β and only aliskiren increased IL-10. Conclusion: Enalapril, candesartan and aliskiren presented similar effects on improving renal function and reducing MAP and urinary levels of IL-6 in rats with CKD. On the other hand, cytokine profile differed according to the treatment, suggesting that differential mechanisms were triggered in response to the site of RAS blockade.

Resumo Introdução: Ainda não se sabe como a inibição farmacológica do Sistema Renina Angiotensina (SRA) afeta os níveis de biomarcadores de inflamação e fibrose. Objetivo: Este estudo pretendeu avaliar o efeito de enalapril, candesartan e alisquireno sobre os níveis urinários de citocinas em um modelo de doença renal crônica (DRC). Métodos: Ratos Wistar machos foram submetidos à remoção cirúrgica de ¾ do parênquima renal para induzir DRC (nefrectomia), ou submetidos à cirurgia fictícia (controle). Animais foram então randomizados em cinco grupos: Cirurgia fictícia recebendo veículo; Nefrectomia recebendo veículo; Nefrectomia recebendo enalapril (10 mg/kg); Nefrectomia recebendo candesartan (10 mg/kg) e Nefrectomia recebendo alisquireno (10 mg/kg). Débito urinário, ingesta hídrica, pressão arterial media (PAM) e concentrações urinárias de creatinina, ureia, albumina, Na+, K+, interleucina (IL) -1β, IL-6, IL-10 e fator de transformação e crescimento beta (TGF-β) foram medidas. Resultados: A nefrectomia comprometeu significativamente a função renal, aumentou a PAM e alterou os níveis de todas as citocinas avaliadas na urina. Enalapril, candesartan e alisquireno melhoraram a função renal e diminuíram a PAM e a IL-6 quando comparado aos grupo de animais nefrectomizados tratados com veículo. Candesartan e alisquireno reduziram IL-1β, enquanto somente candesartan diminuiu o TGF-β e somente alisquireno aumentou a IL-10. Conclusão: Enalapril, candesartan e alisquireno apresentaram efeitos similares em relação à melhora da função renal e redução da PAM e dos níveis urinários de IL-6 em ratos com DRC. Por outro lado, o perfil de citocinas diferiu de acordo com o tratamento, sugerindo que diferentes mecanismos sejam desencadeados em resposta ao local de bloqueio do SRA.
Descritores: Benzimidazóis/farmacologia
Inibidores da Enzima Conversora de Angiotensina/farmacologia
Enalapril/farmacologia
Citocinas/urina
Bloqueadores do Receptor Tipo 1 de Angiotensina II/farmacologia
Amidas/farmacologia
-Sistema Renina-Angiotensina/efeitos dos fármacos
Tetrazóis/farmacologia
Distribuição Aleatória
Ratos Wistar
Fumaratos/farmacologia
Nefrectomia
Limites: Animais
Masculino
Ratos
Responsável: BR1.1 - BIREME


  8 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Texto completo
Id: biblio-1039048
Autor: Rodrigues, Leticia Norma Carpentieri; Tavares, Anna Carollina Moraes; Ferreira, Beatriz Tavares; Reis, Adriana Karla Cardoso Amorim; Katiki, Luciana Morita.
Título: Inclusion complexes and self-assembled cyclodextrin aggregates for increasing the solubility of benzimidazoles
Fonte: Braz. J. Pharm. Sci. (Online);55:e17776, 2019. tab, graf.
Idioma: en.
Resumo: Albendazole and fenbendazole are imidazole derivatives that exhibit broad spectrum activity against parasites, but the low solubility of these drugs considerably reduces their effectiveness. Complexation of albendazole and fenbendazole with cyclodextrins (ß-cyclodextrin and hydroxypropyl-ß-cyclodextrin) in both water and an aqueous solution of polyvinylpyrrolidone (PVP-k30) was studied to determine if it could increase the solubility and dissolution rate of the drugs. In an aqueous solution, ß-cyclodextrin increased the solubility of albendazole from 0.4188 to ~93.47 µg mL-1 (223×), and of fenbendazole from 0.1054 to 45.56 µg mL-1 (432×); hydroxypropyl-ß-cyclodextrin, on the other hand, increased solubility to ~443.06 µg mL-1 (1058×) for albendazole and ~159.36 µg mL-1 (1512×) for fenbendazole. The combination of hydroxypropyl-ß-cyclodextrin and polyvinylpyrrolidone enabled a solubility increase of 1412× (~591.22 µg mL-1) for albendazole and 1373× (~144.66 µg mL-1) for fenbendazole. The dissolution rate of the drugs was significantly increased in binary and ternary systems, with hydroxypropyl-ß-cyclodextrin proving to be more effective. The presence of the water-soluble PVP-k30 increased the dissolution rate and amorphization of the complexes. Analysis of the changes in displacement and the profile of the cyclodextrin bands in the 1H NMR spectra revealed a molecular interaction and pointed to an effective complexation in the drug/cyclodextrin systems. Monomeric forms and nanoclusters of cyclodextrins were observed in the drug/cyclodextrin systems, suggesting that the increase in solubility of the drugs in the presence of cyclodextrins should not be attributed only to the formation of inclusion complexes, but also to the formation of cyclodextrin aggregates
Descritores: Benzimidazóis/administração & dosagem
Ciclodextrinas/farmacocinética
Dissolução/classificação
-Solubilidade
Preparações Farmacêuticas
Albendazol/análise
Fenbendazol/análise
Antiparasitários/análise
Responsável: BR40.1 - DBD - Divisão de Biblioteca e Documentacão do Conjunto das Químicas


  9 / 108 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-1002253
Autor: Faddladdeen, Khadija Abduljalil; Murad, Hussam Aly; Ali, Soad Shaker.
Título: Improved histoarchitectural changes with angiotensin receptor blockers in early testicular and cauda toxicity in rats / Mejora de los cambios en la histoarquitectura con bloqueadores de receptores de angiotensina en la toxicidad precoz testicular y de cauda en ratas
Fonte: Int. j. morphol;37(2):515-521, June 2019. tab, graf.
Idioma: en.
Projeto: King Abdulaziz University.
Resumo: SUMMARY: Reproductive dysfunction is a complication for many diseases and toxins. Its early diagnosis and treatment are immensely important. Here the morphological histoarchitecture changes in early testicular and cauda toxicity before and after treatment with angiotensin receptor blockers were evaluated. Low-grade testicular damage was induced using thioacetamide (TAA, 50 mg/kg/day) intraperitoneally for two weeks in rats. The rats were randomly divided into four groups (n = 8) treated daily orally for three weeks as follows: Normal control (distilled water), TAA (positive control), TAA+candesartan (0.2 mg/kg) and TAA+losartan (7.5 mg/kg). Serum testosterone and testicular malondialdehyde and glutathione were measured. The changes in histoarchitecture of testis and cauda epididymis were evaluated by hematoxylin and eosin for general structure, Masson's trichrome for collagen, periodic acid Schiff for basement membrane, and caspase-3 and proliferating cell nuclear antigen (PCNA) for immunohistochemical analysis. The TAA-rats showed decreases of serum testosterone and testicular glutathione, increases in testicular malondialdehyde, degenerative changes and apoptosis in germ cells, thickening of tubular basal lamina and increases in expression of caspase 3, and decreases in expression of PCNA. The ARBs (candesartan and losartan) significantly reversed these changes with non-significant differences in-between. Treatment with ARBs (candesartan and losartan) significantly reversed TAA-induced low-grade testicular and cauda toxicity in rats. This could be potentially useful for early treatment of male patients with occupational toxicant-induced reproductive dysfunction especially if they are using ARBs for other comorbidities.

RESUMEN: La disfunción reproductiva es una complicación por muchas enfermedades y toxinas. Su diagnóstico y tratamiento tempranos son inmensamente importantes. Aquí se evaluaron los cambios morfológicos en la histoarquitectura en la toxicidad precoz testicular y cauda antes y después del tratamiento con bloqueadores de receptores de angiotensina. Se indujo daño testicular de bajo grado usando tioacetamida (TAA, 50 mg / kg / día) por vía intraperitoneal durante dos semanas en ratas. Las ratas se dividieron aleatoriamente en cuatro grupos (n = 8) tratados diariamente por vía oral durante tres semanas de la siguiente manera: control normal (agua destilada), TAA (control positivo), TAA + candesartan (0,2 mg / kg) y TAA + losartán (7,5 mg / kg). Se midieron la testosterona sérica, el malondialdehído testicular y el glutatión. Los cambios en la histoarquitectura de los testículos y la epidermis de la cauda se evaluaron mediante Hematoxilina y Eosina para determinar la estructura general, con tricrómicro de Masson para el colágeno, ácido periódico de Schiff para la membrana basal y la caspasa-3 y el antígeno nuclear de células proliferantes (PCNA) para análisis inmunohistoquímico. Las ratas TAA mostraron disminución de la testosterona sérica y glutatión testicular, aumentos en el malondialdehído testicular, cambios degenerativos y apoptosis en células germinales, engrosamiento de la lámina basal tubular y aumentos en la expresión de la caspasa 3, y disminución en la expresión de PCNA. Los ARB (candesartán y losartán) revirtieron significativamente estos cambios con diferencias no significativas en el medio. El tratamiento con BRA (candesartán y losartán) revirtió significativamente la toxicidad testicular y cauda inducida por TAA en ratas. Esto podría ser potencialmente útil para el tratamiento temprano de pacientes con disfunción reproductiva inducida por tóxicos ocupacionales, especialmente si están usando BRA para otras comorbilidades.
Descritores: Testículo/efeitos dos fármacos
Tioacetamida/toxicidade
Benzimidazóis/farmacologia
Losartan/farmacologia
Bloqueadores do Receptor Tipo 1 de Angiotensina II/farmacologia
-Testículo/patologia
Testosterona/análise
Tetrazóis/farmacologia
Imuno-Histoquímica
Ratos Sprague-Dawley
Antígeno Nuclear de Célula em Proliferação/metabolismo
Caspase 3/metabolismo
Glutationa/análise
Malondialdeído/análise
Limites: Animais
Masculino
Ratos
Responsável: CL1.1 - Biblioteca Central


  10 / 108 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-888944
Autor: Murad, HA; Gazzaz, ZJ; Ali, SS; Ibraheem, MS.
Título: Candesartan, rather than losartan, improves motor dysfunction in thioacetamide-induced chronic liver failure in rats
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;50(11):e6665, 2017. tab, graf.
Idioma: en.
Projeto: KAU.
Resumo: Minimal hepatic encephalopathy is more common than the acute syndrome. Losartan, the first angiotensin-II receptor blocker (ARB), and candesartan, another widely-used ARB, have protected against developing fibrogenesis, but there is no clear data about their curative antifibrotic effects. The current study was designed to examine their effects in an already-established model of hepatic fibrosis and also their effects on the associated motor dysfunction. Low-grade chronic liver failure (CLF) was induced in 3-month old Sprague-Dawley male rats using thioacetamide (TAA, 50 mg·kg−1·day−1) intraperitoneally for 2 weeks. The TAA-CLF rats were randomly divided into five groups (n=8) treated orally for 14 days (mg·kg−1·day−1) as follows: TAA (distilled water), losartan (5 and 10 mg/kg), and candesartan (0.1 and 0.3 mg/kg). Rats were tested for rotarod and open-field tests. Serum and hepatic biochemical markers, and hepatic histopathological changes were evaluated by H&E and Masson's staining. The TAA-CLF rats showed significant increases of hepatic malondialdehyde, hepatic expression of tumor necrosis factor-α (TNF-α), and serum ammonia, alanine aminotransferase, γ-glutamyl transferase, TNF-α, and malondialdehyde levels as well as significant decreases of hepatic and serum glutathione levels. All treatments significantly reversed these changes. The histopathological changes were moderate in losartan-5 and candesartan-0.1 groups and mild in losartan-10 and candesartan-0.3 groups. Only candesartan significantly improved TAA-induced motor dysfunction. In conclusion, therapeutic antifibrotic effects of losartan and candesartan in thioacetamide-induced hepatic fibrosis in rats are possibly through angiotensin-II receptor blocking, antioxidant, and anti-inflammatory activities. Improved motor dysfunction by candesartan could be attributed to better brain penetration and slower "off-rate" from angiotensin-II receptors. Clinical trials are recommended.
Descritores: Bloqueadores do Receptor Tipo 1 de Angiotensina II/uso terapêutico
Benzimidazóis/uso terapêutico
Doença Hepática Terminal/complicações
Losartan/uso terapêutico
Transtornos Motores/tratamento farmacológico
Tetrazóis/uso terapêutico
-Alanina Transaminase/sangue
Amônia/sangue
Bloqueadores do Receptor Tipo 1 de Angiotensina II/farmacologia
Benzimidazóis/farmacologia
Modelos Animais de Doenças
Doença Hepática Terminal/patologia
Doença Hepática Terminal/fisiopatologia
Ensaio de Imunoadsorção Enzimática
gama-Glutamiltransferase/sangue
Glutationa/análise
Cirrose Hepática/complicações
Cirrose Hepática/patologia
Cirrose Hepática/fisiopatologia
Fígado/efeitos dos fármacos
Fígado/patologia
Locomoção/fisiologia
Losartan/farmacologia
Malondialdeído/análise
Transtornos Motores/etiologia
Transtornos Motores/fisiopatologia
Distribuição Aleatória
Ratos Sprague-Dawley
Reprodutibilidade dos Testes
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Tetrazóis/farmacologia
Tioacetamida
Resultado do Tratamento
Fator de Necrose Tumoral alfa/sangue
Limites: Animais
Masculino
Tipo de Publ: Estudo Comparativo
Responsável: BR1.1 - BIREME



página 1 de 11 ir para página                         
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde