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Administration of human recombinant activated protein C is not associated with pancreatic parenchymal haemorrhage in L-arginine-induced experimental acute pancreatitis.

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BACKGROUND Microvascular thrombosis is a critical event in severe acute pancreatitis. Human recombinant activated protein C (Xigris®, Eli Lilly, Indianapolis, IN, USA) modulates the interplay between pro-inflammatory and pro-coagulant pathways and maintains microvascular patency. However, the

Alleviation of brain edema by L-arginine following experimental subarachnoid hemorrhage in a rat model.

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Decreased levels of nitric oxide play a role in the development of cerebral ischemia secondary to subarachnoid hemorrhage (SAH). The protective effect of L-arginine on brain edema following SAH was investigated in this study. Rats were divided randomly into a sham-operated, a SAH+saline group and a

L-arginine attenuates trauma-hemorrhage-induced liver injury.

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OBJECTIVE Liver injury is common after trauma-hemorrhage for which the underlying mechanism is not clear. Although administration of the essential amino acid L-arginine has been reported to restore the depressed cardiovascular functions and cell-mediated immune responses after trauma-hemorrhage, it

L-Arginine restores splenocyte functions after trauma and hemorrhage potentially by improving splenic blood flow.

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Several studies indicate that immune responses are markedly depressed early after onset of hemorrhage. Decreased organ blood flow has been implicated in the pathophysiology of altered immune responses after trauma-hemorrhage. In this regard, administration of L-arginine has been shown to restore

Effects of N(omega)-nitro-L-arginine (L-NOARG) on blood flow and vasomotion in rat diaphragm microcirculation during hemorrhagic hypotension.

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The role of N(omega)-nitro-L-arginine (L-NOARG), a nitric oxide (NO) synthase inhibitor, in the control of blood flow and vasomotion in rat diaphragm microcirculation during hemorrhagic hypotension was investigated by means of laser Doppler flowmetry (LDF). Fifty-six Sprague-Dawley rats were divided

Influence of L-arginine, aminoguanidine, and NG-nitro-L-arginine methyl ester (L-name) on the survival rate in a rat model of hemorrhagic shock.

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Nitric oxide (NO) has been implicated in the pathophysiology of hemorrhagic shock. We investigated the influence of L-arginine (the precursor of NO synthesis), N(G)-nitro-L-arginine methyl ester (L-NAME) and aminoguanidine (AG) (inhibitors of NO synthase, with selectivity toward the constitutive and

L-arginine improves cerebral blood perfusion and vasomotion of microvessels following subarachnoid hemorrhage in rats.

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The purpose of this study is to investigate the effect of L-arginine (L-Arg) on cerebral blood perfusion and vasomotion (perfusion motion) in microvessels following subarachnoid hemorrhage (SAH). Rat noncraniotomy SAH models were used and animals were divided into sham-operated, saline-treated, and

Prevention of the hemorrhagic hypotension-induced hepatic arterial vasoconstriction by L-arginine and naloxone.

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The possible involvement of the L-arginine-nitric oxide pathway and endogenous opioid mechanisms in the hemorrhagic hypotension- (HH) induced changes of hepatic arterial blood flow and vascular resistance was studied in cats. During HH hepatic arterial blood flow was significantly higher both in

The attenuation of hemorrhage-induced liver injury by exogenous nitric oxide, L-arginine, and inhibition of inducible nitric oxide synthase.

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We investigated the role of nitric oxide (NO) in its ability to reduce liver injury in an animal model of hemorrhagic shock (HS). Ninety-six Sprague-Dawley rats weighing 250 to 300 g were divided in 6 groups (n = 16 per group) that included treatment at the beginning of resuscitation with normal

L-arginine, the precursor of nitric oxide, abolishes the effect of estrogens on bleeding time in experimental uremia.

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We have reported previously that conjugated estrogens that are effective in shortening the prolonged bleeding time in uremic patients are also effective on bleeding time in a rat model of uremia. Using such a rat model we have recently demonstrated that nitric oxide (NO), an endothelium-derived

Subarachnoid hemorrhage and endothelial L-arginine pathway in small brain stem arteries in dogs.

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OBJECTIVE Experiments were designed to determine the effect of subarachnoid hemorrhage on endothelium-dependent relaxations in small arteries of the brain stem. A "double-hemorrhage" canine model of the disease was used, and the presence of vasospasm in the basilar artery was confirmed by

Role of endogenous monomethylated L-arginine (L-NMMA) after subarachnoid hemorrhage.

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OBJECTIVE Monomethylated L-arginine (L-NMMA) has been proven to be a strong inhibitor of nitric oxide synthase (NOS) and has been used as an exogenous tool in experimental evaluation of cerebrovascular reactivity leading to vasoconstriction. However, L-NMMA is also produced endogenously and belongs,

Effect of L-arginine on adrenal and renal blood flows during hemorrhage in cats.

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Our earlier studies have shown development of endothelial dysfunction in the feline renal artery during hemorrhagic hypotension. Because L-arginine (L-Arg), the precursor of nitric oxide (NO), reportedly improves endothelial function in several pathophysiological states including hypotension, we

The role of L-arginine following trauma and blood loss.

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OBJECTIVE Vascular endothelial cells control vascular smooth muscle tone via the release of nitric oxide. Following adverse circulatory conditions, namely trauma and hemorrhage, endothelial cell dysfunction occurs, leading to a decrease in the release of endothelium-derived nitric oxide, which

Use of nitric oxide producer L-arginine during infusion therapy of experimental hemorrhagic shock.

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Experiments on rats showed that infusion of NO precursor L-arginine before bleeding enhanced their tolerance to hemorrhagic shock. When infused after blood loss as a component of saline solution, L-arginine improved efficiency of infusion therapy for hemorrhagic shock and increased survival rate of

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