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Id: biblio-973840
Autor: Tianshu-Chu,; Congrong-Gao,; Zhiwei-zhao,; Fei-Ling,; Ayu-Sun,; Yuanbiao-Zheng,; Jing-Cao,; Ge, Jianjun.
Título: Rapamycin Combined with α-Cyanoacrylate Contributes to Inhibiting Intimal Hyperplasia in Rat Models / Rapamicina em Combinação com α-Cianoacrilato Contribui à Inibição de Hiperplasia Intimal em Modelos em Ratos
Fonte: Arq. bras. cardiol;112(1):3-10, Jan. 2019. graf.
Idioma: en.
Resumo: Abstract Background: Vein graft restenosis has an adverse impact on bridge vessel circulation and patient prognosis after coronary artery bypass grafting. Objectives: We used the extravascular supporter α-cyanoacrylate (α-CA), the local application rapamycin/sirolimus (RPM), and a combination of the two (α-CA-RPM) in rat models of autogenous vein graft to stimulate vein graft change. The aim of our study was to observe the effect of α-CA, RPM, and α-CA-RPM on vein hyperplasia. Methods: Fifty healthy Sprague Dawley (SD) rats were randomized into the following 5 groups: sham, control, α-CA, RPM, and α-CA-RPM. Operating procedure as subsequently described was used to build models of grafted rat jugular vein on carotid artery on one side. The level of endothelin-1 (ET-1) was determined by enzyme-linked immunosorbent assay (ELISA). Grafted veins were observed via naked eye 4 weeks later; fresh veins were observed via microscope and image-processing software in hematoxylin-eosin (HE) staining and immunohistochemistry after having been fixed and stored" (i.e. First they were fixed and stored, and second they were observed); α-Smooth Muscle Actin (αSMA) and von Willebrand factor (vWF) were measured with reverse transcription-polymerase chain reaction (RT-PCR). Comparisons were made with single-factor analysis of variance and Fisher's least significant difference test, with p < 0.05 considered significant. Results: We found that intimal thickness of the α-CA, RPM, and α-CA-RPM groups was lower than that of the control group (p < 0.01), and the thickness of the α-CA-RPM group was notably lower than that of the α-CA and RPM groups (p < 0.05). Conclusion: RPM combined with α-CA contributes to inhibiting intimal hyperplasia in rat models and is more effective for vascular patency than individual use of either α-CA or RPM.

Resumo Fundamento: Reestenose de enxertos venosos tem um impacto adverso na circulação de pontagens e no prognóstico de pacientes após a cirurgia de revascularização miocárdica. Objetivos: Nós utilizamos α-cianoacrilato (α-CA) como suporte extravascular, rapamicina/sirolimus (RPM) como aplicação local e a combinação dos dois (α-CA-RPM) em modelos de enxerto venoso autógeno em ratos para estimular mudança no enxerto venoso. O objetivo do nosso estudo foi observar o efeito de α-CA, RPM e α-CA-RPM na hiperplasia venosa. Métodos: Cinquenta ratos Sprague Dawley (SD) saudáveis foram randomizados nos 5 grupos seguintes: sham, controle, α-CA, RPM e α-CA-RPM. O procedimento operacional descrito subsequentemente foi utilizado para construir modelos de enxertos da veia jugular na artéria carótida em ratos, em um lado. O nível de endotelina-1 (ET-1) foi determinado por ensaio de imunoabsorção enzimática (ELISA). As veias enxertadas foram observadas a olho nu 4 semanas após; as veias frescas foram observadas via microscópio e software de processamento de imagem com coloração hematoxilina-eosina (HE) e imuno-histoquímica depois de serem fixadas e armazenadas; α-actina do músculo liso (αSMA) e o fator de von Willebrand (vWF) foram medidos com reação em cadeia da polimerase-transcriptase reversa (RT-PCR). Realizaram-se as comparações com análise de variância de fator único (ANOVA) e o teste de diferença mínima significativa (LSD) de Fisher, com p < 0,05 sendo considerado estatisticamente significante. Resultados: Nós achamos que a espessura intimal nos grupos α-CA, RPM e α-CA-RPM era menor que no grupo controle (p < 0,01) e a espessura no grupo α-CA-RPM era notavelmente menor que nos grupos α-CA e RPM (p < 0,05). Conclusão: A combinação de RPM e α-CA contribui à inibição de hiperplasia em modelos em ratos e é mais efetivo para patência vascular que uso individual de α-CA ou RPM.
Descritores: Túnica Íntima/efeitos dos fármacos
Túnica Íntima/patologia
Sirolimo/farmacologia
Cianoacrilatos/farmacologia
Hiperplasia/prevenção & controle
-Fatores de Tempo
Ensaio de Imunoadsorção Enzimática
Artérias Carótidas/patologia
Artérias Carótidas/transplante
Distribuição Aleatória
Ponte de Artéria Coronária/efeitos adversos
Reprodutibilidade dos Testes
Actinas/análise
Resultado do Tratamento
Ratos Sprague-Dawley
Endotelina-1/sangue
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Proliferação de Células/efeitos dos fármacos
Modelos Animais de Doenças
Combinação de Medicamentos
Oclusão de Enxerto Vascular/etiologia
Oclusão de Enxerto Vascular/patologia
Oclusão de Enxerto Vascular/prevenção & controle
Veias Jugulares/patologia
Veias Jugulares/transplante
Limites: Animais
Masculino
Feminino
Tipo de Publ: Research Support, Non-U.S. Gov't
Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-1011412
Autor: Li, Wenting; Yu, Xiaolan; Zhu, Chuanlong; Wang, Zheng; Zhao, Zonghao; Li, Yi; Zhang, Yonghong.
Título: Notum attenuates HBV-related liver fibrosis through inhibiting Wnt 5a mediated non-canonical pathways
Fonte: Biol. Res;52:10, 2019. tab, graf.
Idioma: en.
Projeto: WBE Liver Fibrosis Foundation; . International Cooperative Project of Anhui Province; . Fundamental Research Funds for the Central Universities.
Resumo: BACKGROUND: Non-canonical Wnt pathways play important roles in liver fibrosis. Notum is a newly discovered inhibitor to Wnt proteins. This study was to investigate anti-fibrotic effects of Notum. METHODS: 53 patients with hepatitis B virus (HBV) infection as well as a cell co-culture system of LX-2 and Hep AD38 cells were engaged in this study. Clinical, biological and virological data of each patient were analyzed. Cell viability was detected at different time points. mRNA and protein levels of NFATc1 (Nuclear factor of activated T-cells), Jnk, α-SMA, Col1A1 and TIMP-1 were detected both in LX-2 and liver tissue. Protein levels of NFATc1 and Jnk in liver tissue and their correlations with fibrosis score were analyzed. RESULTS: Hepatitis B virus replication up-regulated Wnt5a induced NFATc1 and Jnk activity in Hep AD38. Notum suppressed NFATc1, Jnk and fibrosis genes expression, reduced cell viability in co-cultured LX-2 cells induced by HBV. Interestingly, Patients with HBV DNA > 5log copies/ml had higher mRNA levels of NFATc1 and fibrosis genes than patients with HBV DNA < 5log copies/ml. Most importantly, protein expressions of NFATc1 and pJnk have positive correlations with liver fibrosis scores in HBV-infected patients. CONCLUSIONS: Our data showed that Notum inhibited HBV-induced liver fibrosis through down-regulating Wnt 5a mediated non-canonical pathways. This study shed light on anti-fibrotic treatment.
Descritores: Esterases/administração & dosagem
Proteína Wnt-5a/antagonistas & inibidores
Hepatite B/complicações
Cirrose Hepática/prevenção & controle
-Replicação Viral
Transfecção
Sobrevivência Celular
Vírus da Hepatite B/fisiologia
Actinas/metabolismo
Inibidor Tecidual de Metaloproteinase-1/metabolismo
Colágeno Tipo I/metabolismo
MAP Quinase Quinase 4/metabolismo
Fatores de Transcrição NFATC/análise
Fatores de Transcrição NFATC/metabolismo
Via de Sinalização Wnt
Proteína Wnt-5a/metabolismo
Cirrose Hepática/metabolismo
Cirrose Hepática/virologia
Limites: Humanos
Masculino
Feminino
Adulto
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-896591
Autor: Costa Filho, Octávio Antonio Azevedo da; Ribas Filho, Jurandir Marcondes; Ariede, Bruno Luiz; Cavalcanti, Tereza; Scapini, João Guilherme Seifert; Pasetto, Camila Vitola.
Título: Avaliação da eficácia de três marcadores imunoistoquímicos envolvidos nos diferentes tempos da cicatrização da ferida cirúrgica / Comparative efficacy of immunohistochemical markers in surgical healing
Fonte: Rev. Col. Bras. Cir;44(4):367-373, jul.-ago. 2017. tab, graf.
Idioma: pt.
Resumo: RESUMO Objetivo: avaliar a eficácia de três marcadores imunoistoquímicos envolvidos no processo de cicatrização de ferida cirúrgica. Métodos: estudo experimental em 40 ratos da raça Wistar, dos marcadores metaloproteinases e metaloproteinase da matriz 9 (MMP-9), fator de transformação do crescimento beta (TGF-β) e miofibroblasto e alfa actina de músculo liso (α-AML), estudados a partir de fragmentos de cicatriz cirúrgica de incisão abdominal envolvendo pele, aponeurose e peritônio. Os animais foram distribuídos em quatro subgrupos de dez de acordo com o dia da morte, programada em três, sete, 14 e 21 dias. Resultados: na expressão da MMP-9 ocorreu aumento progressivo de sua concentração, mais evidente do 7º ao 14º dias variando a imuno-expressão tecidual entre 2,65% e 11,50%.TGF- β mostrou expressão em nível alto no 3º dia, caiu no 7º, voltando a subir no 14º, com pequena queda no 21º dia variando a imuno-expressão tecidual entre 0,03% e 2,92%. A α-AML apresentou níveis com pouca variação e discreto aumento variando a imuno-expressão tecidual entre 0,88% e 3,23%. Conclusão: a MMP-9 se apresentou como melhor marcador, seguido pela TGF-β. Já o α-AML não se mostrou um bom sinalizador da evolução da reparação tissular.

ABSTRACT Objective: to evaluate the efficacy of three immunohistochemical markers involved in the wound healing process. Methods: experimental study of 40 Wistar rats of the markers metalloproteinases and matrix metalloproteinase 9 (MMP-9), beta transforming growth factor (TGF-β) and myofibroblasts and smooth muscle actin alpha (α-MLA) markers, studied from fragments of surgical scar of abdominal incision involving skin, aponeurosis and peritoneum. The animals were divided into four subgroups of ten according to the day of death, scheduled in three, seven, 14 and 21 days. Results: MMP-9 expression showed a progressive increase of its concentration, more evident from 7th to 14th days, varying the tissue immunoexpression between 2.65% and 11.50% . TGF- β showed expression at high level on the 3rd day, fell in the 7th, rising again in the 14th, with a small decrease in the 21st day, varying the tissue immunoexpression between 0.03% and 2.92%. The α-AML presented levels with little variation and a slight increase, varying the tissue immunoexpression between 0.88% and 3.23%. Conclusion: MMP-9 presented as the best marker, followed by TGF-β. However, α-AML was not a good indicator of the evolution of tissue repair.
Descritores: Cicatrização
Fator de Crescimento Transformador beta/análise
Actinas/análise
Metaloproteinase 9 da Matriz/biossíntese
Ferida Cirúrgica/imunologia
Ferida Cirúrgica/patologia
-Imuno-Histoquímica
Biomarcadores/análise
Fator de Crescimento Transformador beta/fisiologia
Actinas/fisiologia
Ratos Wistar
Metaloproteinase 9 da Matriz/fisiologia
Limites: Animais
Masculino
Ratos
Tipo de Publ: Estudo Comparativo
Responsável: BR1.1 - BIREME


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Id: biblio-949364
Autor: Görük, Neval Yaman; Deveci, Engin.
Título: Immunoexpression of vascular endothelial growth factor and B-cell lymphoma 2 in the uterine tissue of rats treated with melatonin in the estrus phase
Fonte: Acta cir. bras;33(7):629-640, July 2018. tab, graf.
Idioma: en.
Resumo: Abstract Purpose: To investigate the effect of melatonin on uterine tissue in the ovariectomized rat model. Methods: Fourty Wistar albino rats were divided into four groups for histologic and immunohistochemical examination. The rats were first numbered randomly and then randomly divided into 4 equal groups: control (group 1), torsion (group 2), torsion+detorsion (group 3) and torsion+detorsion+melatonin (group 4) groups. In addition, four Wistar albino rats were used for western blot analysis in each group. And also, malondialdehyde (MDA) levels were measured biochemically in all rats. Results: The histopathological examination of the uterine tissue in rats ovarectomized showed a degeneration in uterine glands, dilation of blood vessels in the internal layer with a thrombosis and bleeding, abnormal nucleuses and vacuolated cytoplasm above and below the nucleus. In torsion group, the apoptotic cells increased in luminal epithelium and gland cells. In the melatonin group showed that the Bcl2 negative effect on the uterine epithelium and did not lead to apoptotic cells. Conclusion: The increase in vascular endothelial growth factor expression resulted in the rearrangement of endothelial cell growth and the induction of angiogenesis.
Descritores: Útero/efeitos dos fármacos
Útero/patologia
Estro/efeitos dos fármacos
Genes bcl-2/efeitos dos fármacos
Fator A de Crescimento do Endotélio Vascular/análise
Melatonina/farmacologia
Antioxidantes/farmacologia
-Imuno-Histoquímica
Ovariectomia
Distribuição Aleatória
Western Blotting
Actinas/análise
Fator A de Crescimento do Endotélio Vascular/efeitos dos fármacos
Malondialdeído/análise
Limites: Animais
Feminino
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-887177
Autor: Murback, Nathalia Dias Negrão; Takita, Luiz C; Castro, Bruna Corrêa de; Hans Filho, Gunter.
Título: Cutaneous leiomyosarcoma on the face
Fonte: An. bras. dermatol;93(2):262-264, Mar.-Apr. 2018. tab, graf.
Idioma: en.
Resumo: Abstract: Leiomyosarcoma is a rare skin tumor, most common in white men in the fifth to eighth decades of life. Primary tumors are classified in dermal or subcutaneous, that differ by clinical and prognostic features. They may appear on any site of the body, but are rare on the face. A 54-year-old female was admitted with a 5cm exophytic nodular lesion of 8 months duration on the right cheek, site of previous chronic radiodermatitis. Histopathology revealed spindle-shaped cell neoplasia, positive for smooth muscle actin on immunohistochemistry. Cutaneous leiomyosarcomas on the face are rare and may occur in previously irradiated areas. Immunohistochemistry is mandatory for an accurate diagnosis. Its similarity with other tumors may complicate the diagnosis, with delay expansion of the tumor.
Descritores: Neoplasias Cutâneas/patologia
Neoplasias Faciais/patologia
Leiomiossarcoma/patologia
-Neoplasias Cutâneas/diagnóstico
Neoplasias Faciais/diagnóstico
Imuno-Histoquímica
Actinas/análise
Doenças Raras/patologia
Diagnóstico Diferencial
Leiomiossarcoma/diagnóstico
Músculo Liso/patologia
Limites: Humanos
Feminino
Pessoa de Meia-Idade
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


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Id: biblio-1040159
Autor: Andrade-Mayorga, Omar; Lavados-Romo, Pamela; Valdebenito, Camila; Herrera, Christian L; Carrasco, Carolina; Salazar, Luis A.
Título: Polimorfismo genético ACTN3 R577X en deportistas universitarios chilenos / ACTN3 R577X gene polymorphism in Chilean college athletes
Fonte: Int. j. morphol;37(4):1493-1497, Dec. 2019. tab.
Idioma: es.
Projeto: Dirección de Investigación de la Universidad de La Frontera.
Resumo: Uno de los principales factores genéticos que influenciarían el rendimiento muscular humano es el gen ACTN3, que codifica la proteína estructural del sarcómero α-actinina-3. El polimorfismo R577X (rs1815739) del gen ACTN3 ha sido asociado con varios indicadores de rendimiento muscular y físico en deportistas y población general, pero este fenómeno ha sido escasamente descrito en poblaciones de Latinoamérica y Chile. Por lo tanto, el objetivo del presente estudio fue describir la frecuencia genotípica y distribución alélica de los genotipos de ACTN3 R577X en deportistas universitarios chilenos. 129 deportistas universitarios chilenos representantes de diferentes selecciones deportivas (halterofilia, balonmano, voleibol, rugby, basquetbol, futbol y futsal) participaron como voluntarios. Los análisis moleculares del polimorfismo R577X del gen ACTN3 fueron realizados mediante reacción en cadena de la polimerasa (PCR) y restricción enzimática (RFLP). La distribución de genotipos del polimorfismo ACTN3 R577X fue RR: 34,8 % (n=45), RX: 50,4 % (n=65), XX: 14,7 % (n=19), y la frecuencia relativa de alelos fue R: 0,601 y X: 0,399. Además, se encontró asociación entre distribución de genotipos (c2= 12,26; 2 gl; p=0,002) y frecuencia relativa de alelos (c2= 11.02; 1 gl; p=0.0009) con el sexo de los participantes. Sin embargo, no hubo asociación al realizar análisis por tipo de deporte practicado. Los hallazgos de la presente investigación sugieren que el polimorfismo R577X del gen ACTN3 está asociado con el sexo en deportistas universitarios chilenos. Además, estos resultados describen de forma inédita la distribución genotípica y frecuencia alélica de esta variante genética en población chilena, mostrando una distribución similar a otros estudios realizados en poblaciones de deportistas en Brasil, Rusia, Estados Unidos y Turquía. No obstante, también muestra diferencias con otras poblaciones generales y de deportistas.

One of the main genetic factors that influence the muscular performance is the gene that encodes the structural protein α-actinin-3 (ACTN3). The R577X polymorphism (rs1815739) of ACTN3 has been associated with indicators of muscle and physical performance in athletes and general population, but this has been scarcely described in the Latin American and Chilean population. Thus, the aim of the present study was to describe the genotypic frequency and allelic distribution of ACTN3 R577X genotypes in college athletes. A total of 129 unrelated Chilean college athletes representing various sport disciplines (weightlifting, handball, volleyball, rugby, basketball, soccer and futsal) were volunteered for the study. ACTN3 R577X gene polymorphism was analysed by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). For the total sample the genotypes distribution for R577X polymorphism was RR: 34.8 % (n=45), RX: 50.4 % (n=65), XX: 14.7 % (n=19), and the relative frequency of alleles was R: 0,601 and X: 0,399. Moreover, an association was found between genotype distribution (c2= 12.26; 2 df; p=0.002) and allele frequencies (c2= 11.02; 1 df; p=0.0009) with the sex of the participants. However, there were no associations when performing analysis by type of sports. These findings suggest that the R577X polymorphism of the ACTN3 gene is associated with sex in Chilean college athletes. Furthermore, these results describe in an unprecedented manner, the genotypic distribution and allelic frequency of this genetic variant in Chilean population, showing a similar distribution to other studies conducted in populations of athletes in Brazil, Russia, the United States and Turkey. However, it also shows differences with other general and athletes populations.
Descritores: Polimorfismo Genético
Estudantes
Actinas/genética
Atletas
-Universidades
Chile
Desempenho Atlético/fisiologia
Limites: Humanos
Masculino
Feminino
Adolescente
Adulto
Adulto Jovem
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-954194
Autor: Sawatpanich, Tarinee; Arun, Supatcharee; Tongpan, Saranya; Chaichun, Amnart; Sampannang, Apichakarn; Sukhorum, Wannisa; Maneenin, Chanwit; Burawat, Jaturon; Iamsaard, Sitthichai.
Título: Localization and changes of tyrosine phosphorylated proteins and ß actin in epididymis of rats treated with valproic acid / Localización y cambios de las proteínas tirosina fosforiladas y la ß actina en epidídimos de ratas tratadas con ácido valproico
Fonte: Int. j. morphol;36(3):835-840, Sept. 2018. graf.
Idioma: en.
Projeto: Khon Kaen University.
Resumo: Tyrosine phosphorylated proteins have been localized and identified in male reproductive tissues such as testis and capacitated/ acrosome reacted sperm except epididymis. The changes of such proteins are associated with decreased sperm quality of valproic acid treatment. This study aimed to investigate the presence and alterations of protein phosphorylation in epididymal epithelium and fluid of rats treated VPA. Sixteen adult male rats were divided into control and VPA-treated groups (n=8/ each). Treated rats were injected with VPA (500 mg/ kgBW, intraperitoneally) for 10 consecutive days. At the end of experiment, the monoclonal antiphosphotyrosine (clone 4G10) was used for immunohistochemistry to probe tyrosine phosphorylated proteins and also to examine the expression of such proteins using immuno-Western blotting in epididymal tissue and fluid. The result showed that positive reactivity of phosphorylated proteins was clearly observed in cytoplasmic principle cells, nuclei of apical & basal cells and sperm mass surrounded with epididymal fluids. The profiles of phosphorylated proteins in epididymal fluid were 182, 127, 80, 70, 57, 45, 34, and 31 kDas, respectively. Interestingly, VPA affected the changes of phosphorylated proteins and β actin in head, body, and tail epididymal fluids. We conclude that tyrosine phosphorylated proteins were detected in epididymal epithelium and fluid. The expressions of those proteins and actin were altered under VPA treating.

Las proteínas tirosina fosforiladas han sido localizadas e identificadas en tejidos reproductores masculinos tales como testículos y espermatozoides, capacitados a nivel acrosómico, excepto en el epidídimo. Los cambios de estas proteínas están asociadas con una disminución de la calidad del esperma en el tratamiento con ácido valproico (AVP). Este estudio tuvo como objetivo investigar la presencia y las alteraciones de la fosforilación de proteínas en el epitelio epididimal y en el fluido espermático de ratas tratadas con AVP. Dieciséis ratas macho adultas se dividieron en dos grupos: control y tratadas con AVP (n = 8 / cada uno). A las ratas tratadas se les inyectó AVP por vía intraperitoneal (500 mg / kg de peso corporal) durante 10 días consecutivos. Al final del experimento, se realizó inmunohistoquímica con la anti-fosfotirosina monoclonal (clon 4G10) para sondear las proteínas tirosina fosforiladas y también para examinar la expresión de tales proteínas usando inmunotransferencia Western, en tejido y fluido epididimarios. El resultado mostró reactividad positiva de proteínas fosforiladas en células citoplásmicas principales, en los núcleos de las células apicales y basales y en la masa de esperma rodeada por fluidos epididimarios. Los perfiles de proteínas fosforiladas en el fluido epididimal fueron 182, 127, 80, 70, 57, 45, 34 y 31 kDas, respectivamente. El AVP provocó cambios en las proteínas fosforiladas y en la β actina de los fluidos epididimarios de cabeza, cuerpo y cola del epidídimo. Concluimos que las proteínas tirosina fosforiladas se detectaron en el epitelio y el fluido epididimarios. Las expresiones de esas proteínas y de la β actina se alteraron bajo tratamiento con AVP.
Descritores: Fosfoproteínas/efeitos dos fármacos
Tirosina/efeitos dos fármacos
Ácido Valproico/administração & dosagem
Actinas/efeitos dos fármacos
Anticonvulsivantes/administração & dosagem
-Fosfoproteínas/metabolismo
Fosforilação
Tirosina/metabolismo
Imuno-Histoquímica
Western Blotting
Actinas/metabolismo
Ratos Sprague-Dawley
Fosfotirosina
Epididimo
Limites: Animais
Masculino
Ratos
Responsável: CL1.1 - Biblioteca Central


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Alvarenga, M. A
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Id: biblio-909825
Autor: Costa, L. D; Dias, M. C; Alvarenga, M. A; Sequeira, J. L.
Título: Identificação dos colágenos I, III, IV e α-SMA e participação dos miofibroblastos no processo fibrótico das endometroses equinas / Identification of collagens types I, III, IV and α-SMA and the participation of myofibroblasts in the fibrotic process in equine endometrosis
Fonte: Arq. bras. med. vet. zootec. (Online);69(6):1398-1406, nov.-dez. 2017. ilus, tab.
Idioma: pt.
Resumo: A endometrose é uma alteração degenerativa das glândulas uterinas e do estroma circundante, caracterizada pelo arranjo periglandular de miofibroblastos e pela deposição de matriz extracelular (ECM). O presente trabalho objetivou avaliar a expressão de colágenos tipos I, III e IV e α-actina de músculo liso (α-SMA) nas endometroses equinas, procurando esclarecer a participação dos miofibroblastos na progressão desses processos. Foram utilizadas 24 biópsias uterinas com diagnóstico de endometrose, recebidas pelo Serviço de Patologia Veterinária e de Reprodução Animal da FMVZ, Unesp, Botucatu, SP. Cortes histológicos foram submetidos às técnicas histoquímicas de tricrômico de Masson, picrosirius red sob luz polarizada e ácido periódico de Schiff (PAS) e imuno-histoquímicas para os três tipos de colágeno citados e α-SMA. Ainda, traçou-se um paralelo entre a técnica de picrosirius red e a imunomarcação dos colágenos tipos I e III. A análise histológica revelou que as fibras de colágeno denso correspondem ao colágeno tipo I, predominantes nas endometroses inativa e inativa destrutiva. As fibras de colágeno frouxo correspondem ao colágeno tipo III, predominantes nas endometroses ativas e ativas destrutivas. Nesses mesmos processos, a membrana basal revelou espessamento, aparentemente não relacionado ao colágeno tipo IV, e uma maior imunomarcação de miofibroblastos periglandulares em relação às endometroses inativa e inativa destrutiva. Dessa forma, nota-se que os miofibroblastos estão relacionados ao aumento na deposição de colágeno tipo III nos ninhos fibróticos ativos.(AU)

Endometriosis is a degenerative change of the uterine glands and surrounding stroma, characterized by periglandular arrangement of myofibroblasts and deposition of extracellular matrix (ECM). The aim of this study was to evaluate the expression of collagen type I, III and IV and α-smooth muscle actin (α-SMA) in equine endometriosis, and investigate the role of myofibroblasts in the progression of these processes. A parallel was made with histochemical techniques of Masson's trichrome, Picrosirius Red under polarized light and Periodic Acid-Schiff (PAS). Twenty four uterine biopsies received by the Veterinary Pathology Service and Animal Reproduction of FMVZ, UNESP, Botucatu, SP, were diagnosed with endometriosis. Histological analysis revealed that the orange dense collagen fibers correspond to type I collagen, being prevalent in inactive and inactive destructive endometriosis. The green loose collagen fibers correspond to type III collagen, and are predominant in active and active destructive endometriosis. In the same processes, a greater amount of periglandular myofibroblasts were observed in comparison to inactive and inactive destructive endometriosis. The presence of these cells in active processes are strongly related to an increased deposition of collagen type III in fibrotic nests. Regarding the basement membrane, the active destructive and active endometriosis shows thickening, apparently not related to an increase in expression of type IV collagen. The active destructive and inactive destructive endometriosis exhibited disruption areas in type IV collagen fibers. Thus, it is noted that the myofibroblasts are related to increased deposition of type III collagen in active fibrotic nests.(AU)
Descritores: Actinas/análise
Colágeno Tipo III/análise
Colágeno Tipo IV/análise
Colágeno Tipo I/análise
Endometriose/fisiopatologia
Cavalos
Miofibroblastos
-Imuno-Histoquímica/veterinária
Limites: Animais
Feminino
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-889501
Autor: EL-BATAL, Ahmed Ibrahim; AHMED, Salwa Farid.
Título: Therapeutic effect of Aloe vera and silver nanoparticles on acid-induced oral ulcer in gamma-irradiated mice
Fonte: Braz. oral res. (Online);32:e004, 2018. tab, graf.
Idioma: en.
Resumo: Abstract Radiation combined injury, a life-threatening condition, has higher mortality than simple radiation injury. The aim of the present study was to analyze the efficiency of Aloe vera and silver nanoparticles in improving the healing of ulcerated oral mucosa after irradiation. Thirty male Albino mice were divided into five groups: control, radiation, Aloe vera (AV), silver nanoparticles (NS), and AV+NS. The mice were exposed to whole body 6Gy gamma-radiation. After one hour, 20% acetic acid was injected into the submucosal layer of the lower lip for ulcer induction. The animals received topical treatment with the assigned substances for 5 days. Lip specimens were subjected to hematoxylin and eosin and anti alpha-smooth muscle actin immunohistochemical staining. Results demonstrated occurance of ulcer three days post irradiation in all groups except in the AV+NS group where only epithelial detachment was developed. After seven days, data revealed persistent ulcer in radiation group, and almost normal epithelium in the AV+NS group. A significant reduction of epithelial thickness was detected in all groups at the third day as compared to control. At the seventh day, only the AV+NS group restored the epithelial thickness. Area percent of alpha-smooth muscle actin expression was significantly decreased in radiation group at the third day followed by significant increase at the seventh day. However, all treatment groups showed significant increase in alpha-smooth muscle actin at the third day, which decreased to normal level at the seventh day. Our study demonstrated the efficiency of Aloe vera and silver nanoparticles in enhancing ulcer healing after irradiation.
Descritores: Aloe/química
Raios gama/efeitos adversos
Nanopartículas Metálicas/uso terapêutico
Úlceras Orais/tratamento farmacológico
Úlceras Orais/etiologia
Lesões Experimentais por Radiação/tratamento farmacológico
Prata/uso terapêutico
-Ácido Acético
Actinas/análise
Administração Tópica
Células Epiteliais/efeitos dos fármacos
Células Epiteliais/efeitos da radiação
Fibroblastos/efeitos dos fármacos
Imuno-Histoquímica
Microscopia Eletrônica de Transmissão
Úlceras Orais/patologia
Lesões Experimentais por Radiação/patologia
Valores de Referência
Reprodutibilidade dos Testes
Fatores de Tempo
Resultado do Tratamento
Cicatrização/efeitos dos fármacos
Limites: Animais
Masculino
Camundongos
Tipo de Publ: Ensaio Clínico Controlado Aleatório
Responsável: BR1.1 - BIREME


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Id: lil-792523
Autor: Chai, SD; Liu, T; Dong, MF; Li, ZK; Tang, PZ; Wang, JT; Ma, SJ.
Título: Inactivated Pseudomonas aeruginosa inhibits hypoxia-induced pulmonary hypertension by preventing TGF-beta1/Smad signaling
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;49(10):e5526, 2016. graf.
Idioma: en.
Resumo: Pseudomonas aeruginosa is one of the common colonizing bacteria of the human body and is an opportunistic pathogen frequently associated with respiratory infections. Inactivated P. aeruginosa (IPA) have a variety of biological effects against inflammation and allergy. Transforming growth factor-β (TGF-β) signaling plays a critical role in the regulation of cell growth, differentiation, and development in a wide range of biological systems. The present study was designed to investigate the effects of IPA on TGF-β/Smad signaling in vivo, using a hypoxia-induced pulmonary hypertension (PH) rat model. Sprague Dawley rats (n=40) were exposed to 10% oxygen for 21 days to induce PH. At the same time, IPA was administered intravenously from day 1 to day 14. Mean pulmonary artery pressure (mPAP) and the right ventricle (RV) to left ventricle plus the interventricular septum (LV+S) mass ratio were used to evaluate the development of PH. Vessel thickness and density were measured using immunohistochemistry. Primary arterial smooth muscle cells (PASMCs) were isolated and the proliferation of PASMCs was assayed by flow cytometry. The production of TGF-β1 in cultured supernatant of PASMCs was assayed by ELISA. The expression levels of α-smooth muscle actin (α-SMA), TGF-β1 and phospho-Smad 2/3 in PASMCs were assayed by western blot. Our data indicated that IPA attenuated PH, RV hypertrophy and pulmonary vascular remodeling in rats, which was probably mediated by restraining the hypoxia-induced overactive TGF-β1/Smad signaling. In conclusion, IPA is a promising protective treatment in PH due to the inhibiting effects on TGF-β1/Smad 2/3 signaling.
Descritores: Hipertensão Pulmonar/metabolismo
Hipertensão Pulmonar/prevenção & controle
Hipóxia/metabolismo
Miócitos de Músculo Liso/fisiologia
Pseudomonas aeruginosa/fisiologia
Proteínas Smad/metabolismo
Fator de Crescimento Transformador beta1/metabolismo
-Actinas/análise
Actinas/metabolismo
Western Blotting
Proliferação de Células/fisiologia
Ensaio de Imunoadsorção Enzimática
Citometria de Fluxo
Hipertensão Pulmonar/etiologia
Hipóxia/complicações
Imuno-Histoquímica
Ratos Sprague-Dawley
Reprodutibilidade dos Testes
Transdução de Sinais/fisiologia
Proteínas Smad/análise
Fator de Crescimento Transformador beta1/análise
Limites: Animais
Masculino
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME



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