Results: 433

Regulatory B cells present in lymph nodes draining a murine tumor

Medicina (B.Aires); 74 (3), 2014
In cancer, B cells have been classically associated with antibody secretion, antigen presentation and T cell activation. However, a possible role for B lymphocytes in impairing antitumor response and collaborating with tumor growth has been brought into focus. Recent reports have described the capacity o...

Análise molecular da expressão do fenótipo multi-droga resistente (MDR) em enterobactérias isoladas de amostras clínicas após exposição in vitro ao Imipenem

Após o surgimento e disseminação das β-lactamases de amplo espectro em membros da família Enterobacteriaceae, os antibióticos carbapenêmicos (imipenem, meropenemeertapenem) têm sido considerados a terapia de escolha devido à estabilidade apresentada contra estas enzimas. A desvantagem destes ant...

Isolation and characterization of lactic acid bacteria and yeasts from the Brazilian grape sourdough

Braz. j. pharm. sci; 50 (2), 2014
Sourdough is a mixture of flour and water fermented by lactic acid bacteria and yeast, with a large use in bakery products. This study was developed with Brazilian grape (Niagara rosada) sourdough obtained from spontaneous fermentation. The aim of this work was to characterize genotypic and phenotypicall...

The structure of selective dinucleotide interactions and periodicities in D melanogaster mtDNA

Biol. Res; 47 (), 2014
BACKGROUND: We found a strong selective 3-sites periodicity of deviations from randomness of the dinucleotide (DN) distribution, where both bases of DN were separated by 1, 2, K sites in prokaryotes and mtDNA. Three main aspects are studied. I) the specific 3 K-sites periodic structure of the 16 DN. II) ...

Morphometric and phytochemical characterization of chaura fruits (Gaultheria pumila): a native Chilean berry with commercial potential

Biol. Res; 47 (), 2014
BACKGROUND: For the first time, a morphometric characterization of chaura (Gaultheria pumila) fruits has been conducted between natural populations growing in the Villarrica National Park, Araucania Region, Chile. Chaura is a native Ericaceae from Chile that produces aromatic and tasty fruits which could...

Caracterização fenotípica e genotípica de Listeria monocytogenes isoladas de produtos cárneos crus comercializados no município de São Pau

Listeria monocytogenes é um importante patógeno de origem alimentar que causa listeriose, infecção severa que acomete, principalmente, gestantes, idosos, crianças e imunocomprometidos, e que apresenta elevada taxa de mortalidade. A bactéria está amplamente distribuída no ambiente e é comumente e...

Discrimination of population of recombinant inbred lines of rye (Secale cereale L. ) for different responses to nitrogen-potassium stress assessed at the seedling stage under in vitro conditions

Electron. j. biotechnol; 16 (1), 2013
Background: Plants differ in the methods used to acquire nutrients from environments with low nutrient availability, and may change the morphology of their ‘root architecture’ to be able to take up nutrients. Results: In the present study rye response to stress caused by high and low nitrogen-potassium...

RIC-8B, um fator trocador de nucleotídeo guanina (GEF), é essencial para a embriogênese

RIC-8B é uma proteína que apresenta, in vitro, atividade de fator de troca de nucleotídeos guanina (GEF). No entanto, seu papel in vivo não é conhecido. Dados anteriores do nosso laboratório demonstraram que essa proteína interage especificamente com Gαolf, que é uma proteína G exclusiva do sis...

Caracterização molecular dos mecanismos de resistência à linezolida em estafilococos coagulase-negativos e estudo da estabilidade do fenótipo resistente

Linezolid was the first agent of the oxazolidinone class to be introduced clinically. This oxazolidinone inhibits protein biosynthesis by preventing the formation of the initiation complex that consists of the mRNA, the f-Met tRNA and the 50S subunit of the ribosome. Although linezolid resistance has bee...

Weak phenotypic reversion of ivermectin resistance in a field resistant isolate of Haemonchus contortus by verapamil

Pesqui. vet. bras; 31 (9), 2011
Recent advances in anthelmintic resistant phenotype reversion by Pgp modulating drugs in ruminant nematodes indicate that this can be a useful tool to helminth control. The aim of the present study was to evaluate the efficacy of ivermectin (IVM) in combination with verapamil (VRP), in oil or water-based...