Lipopolysaccharides
Mostrando 13-24 de 669 artigos, teses e dissertações.
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13. Inflamação durante a gestação: efeito da administração de lipopolissacarídeo (LPS) de Escherichia coli na expressão do fator de inibição de migração de macrófagos (MIF) na interface materno-fetal. / Inflamation during gestation: the effect of the administration of lipopolysaccharide (LPS) from Escherichia coli in the macrophage migrating inhibitory factor (MIF) expression at the materno-fetal interface.
A implantação embrionária determina eventos biológicos de fundamental importância para o desenvolvimento do embrião e para o sucesso da gestação. O fator de inibição de migração de macrófagos (MIF) é uma das muitas citocinas que atuam durante a gestação, desempenhando múltiplas funções biológicas e atividades pró-inflamatórias, em respo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2012
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14. A influência da flora intestinal e da esplenectomia na resistência à insulina induzida por obesidade / Influence of gut microbiota and splenectomy over the obesity-induced insulin resistance
A high-fat diet intake induces obesity and chronic subclinical inflammation, which play important roles in insulin resistance. Increased circulating levels of proinflammatory cytokines, free fatty acids and lipopolysaccharides activate innate immune system, which triggers inflammation and cytokine expression, leading to insulin resistance. Thus, we investiga
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/03/2012
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15. Response of peripheral blood mononuclear cells to conditioned medium from cultured oral squamous cell carcinomas
The current study investigated the capacity for tumor factors secreted by head and neck squamous cell carcinoma (HNSCC) cell lines, KB, KB16, and HEP, to induce the secretion of various cytokines from peripheral blood mononuclear cells (PBMCs). PBMCs were isolated from blood samples collected from six healthy volunteers and these cells were incubated for 6,
Brazilian Oral Research. Publicado em: 2011-10
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16. Efeito da exposição pré-natal à dexametasona e ao lipopolissacáride (LPS) na resposta inflamatória pulmonar alérgica da prole adulta / Effect of perinatal exposure to dexamethasone and lipopolysaccharide (LPS) in pulmonary allergic inflammatory response of adult offspring
Estudos conduzidos em animais de experimentação e em humanos mostram que o período pré-natal é de suma importância para o desenvolvimento da prole. Estressores de qualquer natureza, se aplicados nesse período, podem promover alterações como baixo peso ao nascer, risco de intolerância à glicose, hipertensão arterial, dislipidemias e asma. O objeti
Publicado em: 2010
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17. Use and limitations of peripheral tolerance in experimental model of asthma / Uso e limitações da tolerância imunológica periférica em modelo de asma experimental
Mucosal administration of soluble Ags, before the sensitization with the same Ag, leads to mucosal tolerance. We studied the effect of i.n. LPS during the induction of ovalbumin (OVA) nasal tolerance. The majority of murine models of asthma used OVA as allergen,thus, we also used Blomia tropicalis (Bt) extract, a mite more common in asthmatic patients. Featu
Publicado em: 2009
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18. Passive acquisition of maternal IgG antibodies reactive to lipopolysaccharide from enterobacteria incident in neonatal infections by preterm and term neonates. / Aquisição passiva de anticorpos IgG maternos reativos com os lipopolissacarídeos de enterobactérias incidentes em infecções neonatais por recém-nascidos pré-termos e a termo.
As espécies Klebsiella pneumoniae, Escherichia coli e Pseudomonas aeruginosa são responsáveis por infecções neonatais hospitalares. Lipopolissacarídeo (LPS) é o principal indutor de respostas inflamatórias. Os objetivos foram avaliar a transferência placentária de IgG reativa ao LPS de K. pneumoniae, E. coli O111, O26 e O6 e P. aeruginosa empregand
Publicado em: 2009
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19. Modulation of platelet agregation of rats treated with LPS by resctive oxygen species / Modulação da agregação de plaquetas de ratos tratados com LPS por especies reativas de oxigenio
LPS activates different cells, including platelets, causing the release of inflammatory mediators like nitric oxide, interleukins and reactive oxygen species (ROS). It has been published several reports about the effects of LPS on platelet reactivity but the results are still conflicting and the mechanisms underlying the LPS signaling pathway remains unclear
Publicado em: 2009
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20. Role of B-1 cell in inflammatory response to lipopolysaccharid / Participação da célula B-1 na resposta inflamatória ao lipopolissacáride
Sepsis syndrome is caused by inappropriate immune activation due to bacteria and bacterial components released during infection. This syndrome is the leading cause of death in intensive care units. Specialized B-lymphocytes located in the peritoneal and pleural cavities are known as B-1 cells. These cells produce IgM and IL-10, both of which are potent regul
Publicado em: 2009
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21. Nicotine effects on LPS-induced NF-capaB in the central nervous system / Efeito da nicotina na ativação do fator de transcrição NF-B no sistema nervoso central na vigência de estímulo inflamatório induzido por lipopolissacarídeo (LPS)
Nicotine is an alkaloid extracted from Tobacco plants, and it acts as an agonist in neurons and other cells that express nicotinic receptors. This substance crosses the blood brain barrier and mimics endogenous acetylcholine in interacting with various receptor subtypes. The hippocampus and cerebellum are brain regions rich in nicotinic receptors including 7
Publicado em: 2009
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22. Geração de espécies reativas por exossomos plaquetários: um possível novo mecanismo de disfunção vascular na sepse / Generation of reactive oxygen species by platelet-derived exosomes: a possible novel mechanism of vascular dysfunction in sepsis
Sepsis, the bodys response to infection, is associated with high mortality rates. Why a protective mechanism turns into a deadly clinical picture is a matter of debate, and goes largely unexplained. In previous work we demonstrated that plateled derived exosomes are found in the plasma of septic patients with septic shock and can induce endothelial and vascu
Publicado em: 2009
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23. Characterization of Lypopolyssacharide (LPS) effect on rat pinealocytes / Caracterização dos efeitos de LPS em pinealócitos de rato em cultura
Accumulating evidences put the pineal gland and the immune system reciprocally linked by bidirectional communication. Rat pineal gland constitutively activated NFkB, which plays a role on melatonin synthesis, is a preferential transduction pathway for cytokines and glucocorticoids (Ferreira et al., 2005; Fernandes et al., 2006). TNFα transiently inhibit
Publicado em: 2009
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24. Toll-like receptor 4 (TLR4) na modulação da imunidade do tipo 2. / Toll-like receptor 4 (TLR4) and modulation of Th2 immunity.
Epidemiological and experimental data suggest that bacterial lipopolysaccharides (LPS) can either protect from or exacerbate allergic asthma. LPS triggers immune responses through Toll-like receptor (TLR) 4 that in turn activates two major signaling pathways via either MyD88 or TRIF adaptor proteins. LPS is a pro-Th1 adjuvant while aluminum hydroxide (Alum)
Publicado em: 2008