383 resultados para Receptores dopaminérgicos.
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Ps-graduao em Qumica - IQ
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
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Ps-graduao em Agronomia (Gentica e Melhoramento de Plantas) - FCAV
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
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The aim of this study was to evaluate the influence of the bed in High Density Porous Polyethylene (Medpor) implants integration. Two different kind of beds -- corticalized and decorticalized -- were made in six dogs. The animals were killed thirty, sixty and ninety days after implantation. Blocks including implant and adjacent bone were harvested, submitted to histological procedures, stained in hematoxiline-eosine and analyzed in optic microscope. The results demonstrated an absence of infection and foreign body reaction associated with High Density Porous Polyethylene (Medpor) implants. Furthermore, bony and fibrovascular ingrowth could be observed into its pores. The best integration was noted in decorticalized group, in which occurred a greater bony and fibrovascular ingrowth in comparison to the corticalized group
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Coordenao de Aperfeioamento de Pessoal de Nvel Superior (CAPES)
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The present work deals with the study on the evaluation of the human health risks caused by the leaching of hydrocarbon products from a gas station in Sumar-SP. First, a geoenvironmental diagnosis had to be done, where information such as: history of the area, chemicals involved, geological characteristics, transport, chemical analysis, were used to make it. The geoenvironmental diagnosis was used in the software RBCA tier 2 which established the risks by all possible pathways. The results indicated that there are risks for groundwater ingestion for commercial (on site and off site) and residential receptors and 10 that theres risk for inhalation of vapors in enclosed space for the commercial receptor on site. The evaluation also calculated the specific target levels that the area needs to show, in order not to harm human beings and the environment. That makes RBCA a great tool that can helps the remediation actions needed to be done so that the human being and the environment remain secure.
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O bulbo rostroventrolateral (RVL) uma estrutura importante para o controle cardiovascular. Em ratos espontaneamente hipertensos (SHR), h evidncias de que a transmisso glutamatrgica descendente do RVL aos neurnios pr-ganglionares simpticos maior quando comparada com os ratos Wistar Kyoto (WKY). A adrenomedulina (ADM) um peptdeo de 52 aminocidos que tem como funes: vasodilatao, broncodilatao e neurotransmisso no sistema nervoso central (SNC). Dados da literatura tm demonstrado que a ADM quando microinjetada no RVL de ratos normotensos anestesiados ou normotensos no anestesiados promove aumento da presso arterial. Ademais, tambm j foi demonstrado que a microinjeo bilateral no RVL do antagonista de ADM (adrenomedulina 22-52) em SHR anestesiados foi capaz de reduzir significantemente a presso arterial, enquanto que no foi observado alteraes da presso arterial em ratos normotensos. Uma vez que foi descrito que em SHR h um maior nmero de receptores de ADM no RVL quando comparado com ratos normotensos, esses dados obtidos so convergentes com a idia de que maior nmero de receptores de ADM no RVL de SHR possam ser um dos fatores responsveis pela hipertenso nestes animais. Entretanto, at o momento, no sabemos os efeitos da ADM no RVL de SHR no anestesiados, uma vez que a anestesia pode interferir com a resposta cardiovascular. Estudos anteriores demonstraram que o efeito pressor da ADM no RVL so dependentes de receptores glutamatrgicos, sugerindo uma interao entre a ADM e o glutamato (GLU). Assim, seria interessante estudar a interao entre ADM e a neurotransmisso glutamatrgica no RVL. Por isso, o presente estudo teve como objetivo estudar os efeitos da microinjeo de ADM no RVL e seu efeito sobre a resposta pressora do GLU em ratos normotensos e SHR conscientes... (Resumo completo, clicar acesso eletrnico abaixo)
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Breast cancer has received an increasing attention because it is one of the most common cancer type and a leading cause of morbity and mortality among women worldwide. This disease has been considered as a heterogeneous condition, demonstrating a large spectrum of clinical and histopathological variability. In the last two decades, several studies have been conducted to identify new molecular markers of cancer cells, including the alterations of DNA methylation, which is the major epigenetic mechanism associated with the control of gene expression. The hypermethylation of promoter-associated CpG islands contributes to the loss of function of several cancer-related genes, including those encoding to the estrogen receptor (ESR) and progesterone receptor (PGR). This study aimed to determine the methylation patterns of CpG islands of the genes encoding the estrogen receptor (ESR1 gene, promoters A and B), estrogen receptor (ESR2 gene) and progesterone receptor (PGR gene, promoter A and B) in 15 cell lines derived from breast cancer. The DNA methylation analysis was based on the Methylation Specific-Polymerase Chain Reaction (MSP), which provides a qualitative assessment of the methylation status of a specific CpG island. The results revealed heterogeneous data: the promoter region of ESR1A showed complete methylation in one cell line (BT549) and only two cell lines showed partial methylation (MDA-MB-231 and MDA-MB-453), while the others lineages presented unmethylated alleles. The promoter region of isoform ESR1B was unmethylated in the cell lines BT549, SKBR3 and T47D; partial methylation were observed in the cell lines MDA-MB- 231, MCF-7 and ZR-75-30, while the others cell lines presented complete methylation. All lineages showed complete or partial methylation of the ESR2 gene. The methylation pattern of the promoter A of the PGR ...(Complete abstract click electronic access below)
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A rea septal medial (ASM), situada no prosencfalo, est envolvida na regulao cardiovascular e no controle do balano hidroeletroltico. Esta rea rica em receptores colinrgicos e a ativao dos mesmos induz ingesto de gua, natriurese e anti-diurese. Existem evidncias experimentais de que as espcies reativas de oxignio possam participar do controle de respostas fisiolgicas. Resultados recentes de nosso laboratrio demonstraram que uma espcie reativa de oxignio, o perxido de hidrognio (H2O2), injetada na ASM reduz a ingesto de gua induzida por carbacol (agonista colinrgico) tambm injetado na ASM. No presente projeto propomos estudar os efeitos do aumento da produo endgena de H2O2 na ASM nos efeitos dipsognico, natriurtico e anti-diurtico do carbacol injetado na ASM. O inibidor da catalase, 3 amino 1,2,4 triazole (ATZ) ser injetado na ASM para aumentar os nveis endgenos de H2O2
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Inflammation is an immune complex-related tissue damage and / or cell caused by chemical, physical, immunological or microbial. The inflammatory process involves a complex cascade of biochemical and cellular events, including awareness and receptor activation, lysis and tissue repair. In general, tissue damage trigger a local inflammatory response by recruiting leukocytes, which release inflammatory mediators. These substances are able to sensitize nociceptors. After synaptic transmission and signal modulation by nociceptive sensory neurons, these signals are perceived as pain. Pain is an experience that involves multiple factors. The route of the supraspinal pain control originates in many brain regions, such as substance periarquedutal gray (PAG), median raphe nucleus and rostral ventromedial medulla (RVM) and have a critical role in determining the chronic and acute pain. Anti-inflammatory drugs (NSAIDs) are used to control inflammation, which inhibit the inflammatory mediators, but can cause side effects such as stomach ulcers and cardiovascular damage. An alternative for the treatment of pain and inflammation is the use of plant species. The genus Eugenia belongs to the family Myrtaceae, one of the largest botanical families of expression in the Brazilian ecosystems. From the pharmacological point of view, studies of similar species crude extracts showed the presence of anti-inflammatory, analgesic, antifungal, hypotensive, antidiabetic and antioxidant activity of some species. As a class of importance in therapeutic phytochemical, the flavonoids has represented an important group with significant anti-inflammatory and gastroprotective, and are present in a significant way in the chemical composition of genus Eugenia. The projects overall objective is to evaluate the antinociceptive and anti-inflammatory activities from hydroalcoholic extract of leaves of Eugenia punicifolia (EHEP). In this work we performed acute toxicity ...
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The recombinant bovine somatotropin (rbST) at first, had its widespread use in dairy cows in order to increase milk production. Currently, it has been studied frequently and use their influence both in bovine milk, such as cutting. Its production has been an evolution to the science, using bacteria to produce recombinant DNA. Most authors that have studied and obtained positive results, such as increasing the number of ovarian follicles larger than five millimeters, among others. Its action takes place directly on the ovary, follicles, corpus luteum, the granulosa cells, oviduct, myometrium, endometrium and placenta, where they were found receptors, or indirectly through the release of insuline like growth factor-1 (IGF-1). Therefore, the objective of this work is to explain the importance of bST in bovine as well as the usefulness of this, its mechanism of action and the benefits it can bring when combined with other biotechnology, such as superovulation, embryo transfer, synchronization of estrus, and others
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Segundo dados da V Diretrizes Brasileiras de Hipertenso, 60% das pessoas idosas sofrem de hipertenso arterial, sendo as mulheres mais acometidas por esta doena. Pesquisas tm mostrado uma relao entre exerccio, percepo de dor e presso arterial, e idosos apresentam ainda um decrscimo na sensibilidade cutnea, devido reduo do nmero de receptores sensoriais responsveis pelas terminaes nervosas. Desta maneira, o objetivo deste trabalho foi analisar o efeito de uma sesso de exerccio com pesos na sensibilidade cutnea em idosas hipertensas e normotensas fisicamente ativas. Metodologia: Participaram do estudo dezessete mulheres com 60 anos ou mais, praticantes de exerccio com pesos no Programa de Atividade Fsica para a Terceira Idade (PROFIT) Departamento de Educao Fsica IB - UNESP Rio Claro, divididas em dois grupos (hipertensas com diagnstico mdico e normotensas) e seguiram o seguinte protocolo de avaliao: questionrio de dados cadastrais, antropomtricos (massa corporal, estatura e IMC) e de anamnese clnica; o Questionrio de Baecke Modificado para Idosos (QBMI) para estimativa do nvel de atividade fsica e o Diagrama Corporal da Localizao e Distribuio de Dor; um questionrio para avaliar a ansiedade pr e ps-sesso de exerccio (IDATE) e tiveram o limiar de sensibilidade cutnea avaliado por meio do estesimetro pr e aps um sesso de exerccio com pesos. A anlise estatstica variou de acordo com a natureza das medidas: a) para os dados de avaliao antropomtrica e nvel de atividade fsica foi empregada a estatstica descritiva paramtrica (mdias e desvios-padro); b) teste de Wilcoxon para comparao intra-grupo; c) teste t para comparao inter-grupo do teste de ansiedade; d) teste U de Mann-Whitney para comparao entre os grupos no teste de sensibilidade... (Resumo completo, clicar acesso eletrnico abaixo)
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Estudos tm demonstrado que o reconhecimento inicial de microrganismos mediado por receptores celulares expressos em clulas da imunidade inata denominados receptores de reconhecimento de padres (PRRs). Assim, a interao entre molculas de superfcie dos patgenos e receptores homlogos presentes na membrana celular de moncitos, modula a fagocitose, a ativao da clula e conseqentemente a produo de citocinas. Trabalhos tm demonstrado a importncia da estimulao de receptores toll-like 2 e 4 (TLR2 e TLR4), receptores de manose (MR) e dectina-1 de moncitos, tanto em infeces bacterianas como fngicas, culminando com induo de produo de vrias citocinas. A IL-18 uma citocina indutora de IFN-g e possui uma ao extremamente importante, por ser capaz de promover tanto uma resposta do tipo Th1 ou Th2, dependendo do contexto de estimulao e do microambiente de citocinas. Em trabalho recente demonstramos que a IL-18 possui uma ao importante sobre o aumento da expresso de MR em moncitos humanos, e o reconhecimento do Paracoccidioides brasiliensis via esse receptor causaria aumento do crescimento fngico no interior da clula. Dessa forma, os objetivos do presente projeto foram: 1) Avaliar a ao da IL- 18 sobre a expresso do receptor dectina-1 por moncitos humanos desafiados in vitro com diferentes cepas do P. brasiliensis; b) Avaliar a participao da dectina-1 na induo da produo de IL-18, TNF-a e IL-10 por moncitos desafiados in vitro com diferentes cepas do P. brasiliensis. Assim, moncitos de indivduos normais tratados in vitro com IL-18 foram desafiados com diferentes de cepas do P. brasiliensis, e a expresso do receptor dectina-1 foi avaliada pela tcnica de citometria de fluxo. A dosagem de IL-18, TNF-a e IL-10 no sobrenadante de cultura de moncitos desafiados com P. brasiliensis foi realizada utilizando a tcnica de ELISA . Os resultados mostraram que a ...