Search results for "DISCOVERY"
showing 10 items of 4119 documents
Mechanisms underlying noise-induced hearing loss
2006
Noise-induced hearing loss (NIHL) is the worldwide leading occupational disease and presents an important socio-economic factor. Despite numerous identified details about its etiology, the underlying mechanisms, which induce NIHL, have been only partially identified. In the present article, we shall discuss possible mechanisms focusing on failure in cellular calcium regulation, leading to a rise in mitochondrial NO production and reactive oxygen species formation. In cases where radical production is significantly elevated, pathological concentrations lead to alterations of cell physiological conditions and finally contribute to NIHL. A more detailed knowledge about the induction of free ra…
The role of statins in preventing the progression of congestive heart failure in patients with metabolic syndrome.
2008
Heart Failure (CHF) is a very important public health problem in the world and certainly one of the most common debilitating diseases and cause of mortality. Current knowledge underlines that incidence rates are also influenced by the coexisting pathologic conditions that accelerate the development of disease or increase its severity. Important scientific evidence is emerging to demonstrate a strong correlation between HF and the metabolic syndrome (MetS). Hypolipemia- inducing medication offers the opportunity to discuss the possible existence of pharmacological substances that in addition to their specific targets have several demonstrated pleiotropic effects that could be beneficial in H…
Pharmacological Therapy in Children with Atrial Fibrillation and Atrial Flutter
2008
Heart rhythm disorders in children are not different, on electrocardiographic trace, from heart rhythm disorders in adults with the exception of incidence which is different according to the age. Paticularly, atrial flutter (FlA) and fibrillation (FA) are very uncommon arrhythmias in the general pediatric population. Generally atrial fibrillation and atrial flutter, in our experience, is a temporary heart rhythm disturbance connected to specifical and resovable reasons with the exception of Fontains surgical correction of congenital heart diseases or cardiopathies with dilatation of both atria. Presenting symptoms, symptom history (e.g., frequency, duration, and severity), risk assessment, …
Hereditary angioneurotic oedema and blood-coagulation: interaction between C1-esterase-inhibitor and the activation factors of the proteolytic enzyme…
1983
C-1-inactivator (C-1-INA) does not only exert its important inhibitory functions in the complement system but also in the first step in the activation of the coagulation, fibrinolytic and kallikrein system. We therefore determined in nine patients with hereditary angioneurotic oedema (HANE) with obvious quantitative or functional defects of C-1-INA, and one further patient with Quincke-type oedema of different origin, the coagulation factors of the initial phase such as Hageman factor, plasma thromboplastin antecedent (PTA) and high molecular weight kininogen (HMWK). These factors were further correlated with the concentration as well as functional activity of C-1-INA. Nine of ten patients …
Gastrin: an acid-releasing, proliferative and immunomodulatory peptide?
2010
Gastrin release is affected by gastric inflammatory conditions. Antral G cells respond to inflammatory mediators by increasing gastrin secretion. Accumulating experimental evidence suggests that gastrin exerts immunomodulatory and proinflammatory effects. Gastrin could be a contributing factor to these pathologies, which may constitute a new justification for pharmacological blockade of gastrin action.
Insulin und der Verteilungsraum von Xylit bei eviscerierten Ratten
1964
Insulin hat keinen Einflus auf den Verteilungsraum von Xylit bei eviscerierten alloxandiabetischen Ratten.
Soy-derived phytoestrogens as preventive and acute neuroprotectors in experimental ischemic stroke: Influence of rat strain
2011
The ability of a soy-based high-phytoestrogen diet (nutritional intervention) or genistein (pharmacological intervention), to limit ischemic brain damage in Wistar, Wistar-Kyoto (WKY) and spontaneously hypertensive (SHR) rats, has been assessed. As to the nutritional intervention, two groups from each strain received either a phytoestrogen-free (PE-0) or a high-phytoestrogen (PE-600) diet from weaning to adulthood. As to the pharmacological intervention, all animals were fed the standard soy-free AIN-93G diet and subsequently separated into two groups from each strain to receive either pure genistein (aglycone form, 1mg/kg/day intraperitoneal) or vehicle at 30 min reperfusion. After an epis…
�nderungen des Elektrolytgehalts von Erythrocyten und Plasma bei nephrektomierten Ratten
1957
After two-stage nephrectomy in rats the potassium concentration in the red blood corpuscles (RBC) decreases from 10.6 ± 0.3 to 5.5 ± 0.3 mEq per 100 ml of RBC within 48 h. The decrease is accompanied by a much smaller increase in the plasma potassium concentration; the hyperkaliemia in nephrectomized rats is less pronounced than in nephrectomized dogs or anuric humans. Na+ in RBC increases by about 44% after nephrectomy; while there is only a very slight decrease of Na+ in plasma. Plasma chlorides drop from 10.92 ± 0.08 mEq/100 ml of plasma to 6.00 ± 0.81 mEq % within 48 h after nephrectomy. RBC chlorides tend to increase again after an initial drop from 5.22 ± 0.07 to 3.82 ± 0.90 mEq% with…
Klinischer Verlauf und Narbenentwicklung beim operierten vesico-renalen Reflux in einer Langzeitbeobachtung
1985
62 patients (14 boys, 48 girls) representing 85 refluxive renal units (Grade 2-4) were investigated after successful operation for the development of further urinary tract infections (UTI) and renal scars (RS). The mean follow-up was 9.3 years. With the exception of one boy, none of the male patients developed any UTI or new RS. A similar result was obtained for about 45% of the girls. These two groups of patients presented with high-grade reflux before surgery. The remaining female patients (about 55%), however, presenting with lower-grade reflux before surgical treatment, developed further UTI as well as new RS despite surgical correction of their reflux. Investigations on the capacity of…
Sinusoidal endothelial liver cells in vitro release endothelin — Augmentation by transforming growth factorβ and Kupffer cell-conditioned media
1991
Endothelin is the most potent vasoconstrictor peptide known today. Using a radioimmunoassay for endothelin, we measured immunoreactive endothelin in culture media of guinea pig sinusoidal endothelial liver cells and human umbilical vein endothelial cells. A time-dependent release of immunoreactive endothelin by confluent sinusoidal endothelial liver cells in culture was found. Sinusoidal endothelial liver cells produced similar amounts of immunoreactive endothelin as umbilical vein endothelial cells, about 900 pg/microgram DNA per 24 h. In the presence of transforming growth factor beta a dose-dependent increase of immunoreactive endothelin release was measured. The maximal increase of 50% …