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Stranica 1 iz 88 rezultatima
Plasma First Resuscitation Reduces Lactate Acidosis, Enhances Redox Homeostasis, Amino Acid and Purine Catabolism in a Rat Model of Profound Hemorrhagic Shock.
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The use of aggressive crystalloid resuscitation to treat hypoxemia, hypovolemia, and nutrient deprivation promoted by massive blood loss may lead to the development of the blood vicious cycle of acidosis, hypothermia, and coagulopathy and, utterly, death. Metabolic acidosis is one of the many
Purine nucleosides stimulate Na/K ATPase, and prolong survival in hemorrhagic shock.
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BACKGROUND
Hemorrhagic shock leads to the appearance of substances in plasma that depress Na/K ATPase activity leading to a rise in plasma potassium. Recently, we reported that adenosine can stimulate Na/K ATPase activity, lower the plasma potassium back to control and prolong survival in shocked
Gastric mucosal microcirculation and purine nucleotide metabolism after retransfusion of rats in hemorrhagic shock.
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Gastric mucosal microcirculation and purine nucleotide metabolism were studied after hemorrhagic shock and retransfusion in rats. The number of perfused microvessels and the concentration of adenosine triphosphate, adenosine monophosphate, inosine monophosphate, inosine, hypoxanthine, xanthine, and
Changes in gastric mucosal microcirculation and purine nucleotide metabolism during hemorrhagic shock in rats.
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Intravital fluorescence microscopy and morphometry were used to study the microcirculation in the rat gastric mucosa during and after hemorrhagic shock. Under control conditions the circulation appeared homogeneous and unaffected by superfusion with 0.1 N HCl. During hemorrhagic shock, scattered
Relative cerebral ischemia in SHR due to hypotensive hemorrhage: cerebral function, blood flow and extracellular levels of lactate and purine catabolites.
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Cerebral blood flow (CBF, by laser Doppler flowmetry) and extracellular cortical concentrations (by microdialysis) of adenosine, inosine, xanthine, hypoxanthine, and lactate were measured together with somatosensory evoked potentials (SEP) in chloralose-anaesthetized spontaneously hypertensive rats
A purine antimetabolite attenuates toll-like receptor-2, -4, and subarachnoid hemorrhage-induced brain apoptosis.
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BACKGROUND
Upregulation of high-level toll-like receptors (TLRs) is observed in the serum of animals following experimental subarachnoid hemorrhage (SAH) and is highly related to SAH-induced early brain injury (EBI). The present study was of interest to examine the effect of 6-mercaptopurine (6-MP)
Impaired liver regeneration after hepatectomy and bleeding is associated with a shift from hepatocyte proliferation to hypertrophy.
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Extensive liver resections are common, and bleeding is frequent in these operations. Impaired regeneration after partial hepatectomy (PHx) may contribute to liver failure. We thus assessed the impact of acute bleeding on the liver regeneration progress after PHx and explored possible contributing
Multiple interstitial substances measured by microdialysis in patients with subarachnoid hemorrhage.
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OBJECTIVE
Intracerebral microdialysis is a tool to monitor metabolic disturbances in the brains of patients with severe head injuries or subarachnoid hemorrhage (SAH). In the search for putative indicators of primary and secondary brain damage, we measured multiple metabolites in the dialysates of
Ascorbate preserves gastric mucosal metabolism and microcirculation after hemorrhagic shock and retransfusion in rats.
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The gastric mucosal microcirculation and purine nucleotide metabolism were studied in rats after hemorrhagic shock and retransfusion. The mucosal surface density of perfused vessels (SDPV) and the mucosal levels of ATP, ADP, AMP, IMP, hypoxanthine and uric acid were measured following 15 min of
Mechanism of preferential packaging of negative sense genomic RNA by viral nucleoproteins in Crimean-Congo hemorrhagic Fever virus.
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The Crimean-Congo Hemorrhagic Fever (CCHF) is an infectious disease of high virulence and mortality caused by a negative sense RNA nairovirus. The genomic RNA of CCHFV is enwrapped by its nucleoprotein. Positively charged residues on CCHFV nucleoprotein provide multiple binding sites to facilitate
Hemorrhagic shock and tissue injury drive distinct plasma metabolome derangements in swine.
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BACKGROUND
Tissue injury and hemorrhagic shock induce significant systemic metabolic reprogramming in animal models and critically injured patients. Recent expansions of the classic concepts of metabolomic aberrations in tissue injury and hemorrhage opened the way for novel resuscitative
Protective effects of astaxanthin on subarachnoid hemorrhage-induced early brain injury: Reduction of cerebral vasospasm and improvement of neuron survival and mitochondrial function.
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The purpose of this study was to evaluate the neuroprotective effects of astaxanthin on early brain injury (EBI) caused by subarachnoid hemorrhage (SAH) in rats and to explore possible molecular mechanisms. Experimental SAH model was introduced in adult male SD rats by injecting autologous arterial
Relationship of uric acid concentrations and severe intraventricular hemorrhage/leukomalacia in the premature infant.
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The purine metabolite hypoxanthine accumulates with hypoxia ischemia and with reperfusion is converted to uric acid (UA). We hypothesized that elevated UA concentration is a marker of previous hypoxia ischemia and would identify infants at greatest risk for having subsequent intraventricular
Adenosine in hemorrhagic shock: possible role in attenuating sympathetic activation.
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Changes in plasma purine nucleoside level, autonomic activity and hemodynamic reactions were studied in pentobarbital anesthetized rabbits during hemorrhagic shock. Shock was elicited by bleeding the animals to a mean blood pressure of 40 mmHg and maintained until 60% of the maximum bleeding volume
Effects of 2-ethylamino-1,3,4-thiadiazole on hepatic adenosine nucleotides in experimental hemorrhagic shock.
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2-Ethylamino-1,3,4-thiadiazole (EAT), originally tested as a cancer chemotherapeutic agent, has been shown to increase the de novo synthesis of purines. To evaluate its effects on hepatic adenosine nucleotides in hemorrhagic shock, EAT was administered to dogs prior to bleeding. Concentrations of
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