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Page 1 od 103 rezultati
An improved Percoll density gradient for measurements of experimental brain edema. Addition of sucrose to an isotonic gradient in an attempt to balance osmotic conditions during density determinations.
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Microgravimetric methods are very useful for quantitative studies on brain edema. One of the techniques available is based on a gradient made up by NaCl and polyvinyl pyrrolidone-coated silica particles (Percoll). The present study was performed to find a way of minimizing fluid shifts between the
[14C]urea and [14C]sucrose as permeability indicators in histamine pulmonary edema.
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To see whether, by avoiding red blood cell transport effects, [14C]-sucrose would be a more sensitive lung vascular permeability indicator than [14C]urea, we compared the effects of 4 microgram/kg-min intravenous histamine phosphate infusions on lung vascular permeability-surface area products (PS)
[Intracarotid injections of novocaine, penicillin and sucrose in dogs and the possibility of their use in therapy of cerebral edema, various algias of the face and Meniere's disease].
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[Intracarotid injections of novocain, penicillin, and sucrose and their possibilities in the treatment of cerebral edema, facial aigias, and Menière's syndrome; preliminary note].
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Clearance of edema fluid into cerebrospinal fluid. A mechanism for resolution of vasogenic brain edema.
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The authors present the results of an investigation studying the resolution of vasogenic brain edema using cold injury in cats. The appearance of RISA-I131 and sucrose-C14 lebeled edema fluid in the ventricular cerebrospinal fluid (CSF) was assessed by means of ventriculocisternal perfusion. The
Regional alterations in blood-to-brain transfer of alpha-aminoisobutyric acid and sucrose, after chronic administration and withdrawal of dexamethasone.
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The effect of dexamethasone administration and withdrawal was studied with respect to blood-brain barrier function. The tracers alpha-[3H]aminoisobutyric acid (AIB) (MW 104) and [14C]sucrose (MW 342), which have a low permeability across the intact endothelium, were simultaneously injected
Diffusion tensor imaging supports the cytotoxic origin of brain edema in a rat model of acute liver failure.
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OBJECTIVE
Brain edema is a severe complication of acute liver failure (ALF) that has been related to ammonia concentrations. Two mechanisms have been proposed in the pathogenesis: vasogenic edema that is secondary to the breakdown of the blood-brain barrier and cytotoxic edema caused by ammonia
Perineurial permeability and endoneurial edema during Wallerian degeneration of the frog peripheral nerve.
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Perineurial permeabilities to [3H]sucrose and [14C]dextran (MW = 70,000), and water content, conduction velocity (CV) and maximum amplitude (MAP) of the compound action potential, were determined in Wallerian degenerated nerves (sciatic or tibial) of the frog and compared with values in the
Role of blood-brain barrier permeability in focal ischemic brain edema.
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We studied how changes in BBB function are related to the development of ischemic brain edema. Focal cerebral ischemia was produced by left MCA occlusion in rats. The permeability of the BB to small or large molecules was evaluated qualitatively by the extravasation of EB or NaFl dyes and
Transport of sodium from blood to brain in ischemic brain edema.
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Brain water and sodium increase during ischemia, suggesting that the blood-brain barrier permeability to sodium is increased. To test this hypothesis we measured the permeability-surface area products of 22Na and [3H]sucrose in gerbils following 3 hours of unilateral ischemia. In animals with
Increased apparent diffusion coefficients on MRI linked with matrix metalloproteinases and edema in white matter after bilateral carotid artery occlusion in rats.
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White matter (WM) injury after bilateral common carotid artery occlusion (BCAO) in rat is associated with disruption of the blood-brain barrier (BBB) by matrix metalloproteinases (MMPs). We hypothesized that WM injury as seen on magnetic resonance imaging (MRI) would correlate with regions of
Compositional changes in lipid microdomains of air-blood barrier plasma membranes in pulmonary interstitial edema.
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We evaluated in anesthetized rabbits the compositional changes of plasmalemmal lipid microdomains from lung tissue samples after inducing pulmonary interstitial edema (0.5 ml/kg for 3 h, leading to approximately 5% increase in extravascular water). Lipid microdomains (lipid rafts and caveolae) were
Glycyrrhizic acid can attenuate metabolic deviations caused by a high-sucrose diet without causing water retention in male Sprague-Dawley rats.
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Glycyrrhizic acid (GA) ameliorates many components of the metabolic syndrome, but its potential therapeutic use is marred by edema caused by inhibition of renal 11β-hydroxysteroid dehydrogenase 2 (11β-HSD2). We assessed whether 100 mg/kg per day GA administered orally could promote metabolic
Prevention of nerve edema and increased blood-nerve barrier permeability-surface area product in galactosemic rats by aldose reductase or thromboxane synthetase inhibitors.
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Nerve water content and the permeability-surface area product (PA) to [3H]-or [14C]sucrose at the blood-nerve barrier were determined in unanesthetized control rats fed a normal diet and in rats fed galactose with or without an aldose reductase inhibitor (Statil or AL 1576) or a thromboxane
Stimulation of aldosterone biosynthesis by experimental edema: role of the kidneys.
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The role of the kidneys in the stimulation of aldosterone biosynthesis by sodium sequestration was investigated in potassium-depleted rats. After 2 wk on a potassium-deficient diet, rats were treated by subcutaneous injections of polyethylene glycol or formalin and were then kept on sucrose and
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