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Dengue fever activates the L-arginine-nitric oxide pathway: an explanation for reduced aggregation of human platelets.

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In patients with Dengue fever, a viral inflammatory syndrome, haemorrhage is a significant pathological feature, yet the underlying mechanisms remain unclear. Nitric oxide (NO) is an important regulator of platelet function, inhibiting aggregation, recruitment and adhesion to the vascular

Protective effect of NG-monomethyl-L-arginine against hypotension inducted by combined tumour necrosis factor-alpha and whole body hyperthermia in rats.

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We studied: (a) the adverse effects of tumour necrosis factor-alpha (TNF) given during whole body hyperthermia (WBH) on mean arterial pressure (MAP) and gut mucosa in anaesthetized rats; (b) the potential protective effect of NG-monomethyl-L-arginine (L-NMA), an inhibitor of nitric oxide synthase;

The L-arginine-nitric oxide pathway: a potential therapeutic target in dengue haemorrhagic fever.

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The inhibition of nitric oxide synthase suppresses LPS- and psychological-stress-induced fever in rats.

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The purpose of this study was to assess the effects of a non-selective nitric oxide synthase (NOS) inhibitor on changes in fever response due to injection of lipopolysaccharide (LPS) or on stress fever caused by exposure to an open field in freely moving biotelemetered rats.

Nitric oxide mediates noradrenaline-induced hypothermic responses and opposes prostaglandin E2-induced fever in the rostromedial preoptic area.

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Noradrenaline (NA) microinjected into the rostromedial preoptic area (POA) elicits heat loss responses and opposes prostaglandin E(2)-induced fever. Here, I tested the hypothesis that local synthesis and release of nitric oxide (NO) mediates the NA-induced effects. The unilateral microinjection of

Nitric oxide and fever: immune-to-brain signaling vs. thermogenesis in chicks.

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Nitric oxide (NO) plays a role in thermogenesis but does not mediate immune-to-brain febrigenic signaling in rats. There are suggestions of a different situation in birds, but the underlying evidence is not compelling. The present study was designed to clarify this matter in 5-day-old chicks

Nitric oxide reduces body temperature and sympathetic input to brown adipose tissue during PGE1-hyperthermia.

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The firing rate of the nerves innervating interscapular brown adipose tissue (IBAT) and IBAT and colonic temperatures (TIBAT and TC were monitored in urethane-anaesthetized male Sprague-Dawley rats. These variables were measured for 40 min before (baseline values) and 40 min after a 4 micromoles

Effects of hyperthermia on contraction and dilatation of rabbit femoral arteries.

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To analyze the effect of hyperthermia on the vascular response, the isometric response of isolated rabbit femoral artery segments was recorded at 37 degreesC and hyperthermia (41 and 44 degreesC). Contraction to potassium (5 x 10(-3)-5 x 10(-2) M) was significantly greater at 41 and 44 than at 37

Role of centrally administered melatonin and inhibitors of COX and NOS in LPS-induced hyperthermia and adipsia.

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In the present study we have examined the effect of centrally administered non-steroidal anti-inflammatory drugs (NSAIDS), nitric oxide synthase (NOS) inhibitor and melatonin on lipopolysaccharide (LPS)-induced hyperthermia and its anti-dipsogenic effect. Intracerebroventricular (i.c.v.)

Icilin induces a hyperthermia in rats that is dependent on nitric oxide production and NMDA receptor activation.

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Icilin (AG-3-5) is a cold-inducing agent that activates the transient receptor potential channels TRPM8 and TRPA1. Both channels are members of the transient receptor potential (TRP) superfamily of ion channels and are activated by cold. Despite the key role of cold-activated TRPM8 and TRPA1

Strategies to reduce side effects of interleukin-2: evaluation of the antihypotensive agent NG-monomethyl-L-arginine.

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OBJECTIVE The clinical utility of high-dose intravenous recombinant interleukin (IL)-2 therapy is limited by severe toxicity including hypotension, fever, chills, pulmonary edema, and oliguria Hypotension has been previously shown to result from excessive vascular relaxation due to overproduction of

Effectiveness and tolerability of ibuprofen-arginine versus paracetamol in children with fever of likely infectious origin.

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The aim of this multicentre, double-blind, randomized study was to assess the paediatric antipyretic efficacy of a new ibuprofen formulation containing L-arginine for gastric protection, compared with the efficacy of paracetamol. For this purpose 100 patients were given ibuprofen-arginine (1

Effect of nitro-L-arginine on blood flow, oxygenation and the activity of hypoxic cell cytotoxins in murine tumours.

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This study was an investigation into the ability of nitro-L-arginine to change blood flow, oxygenation status and the activity of hypoxic cell cytotoxic agents in two different transplanted murine tumours. The tumour models were the C3H mammary carcinoma grown in the feet of female CDF1 mice and the

Pharmacological evidence that nitric oxide can act as an endogenous antipyretic factor in endotoxin-induced fever in rabbits.

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1. This study investigates the effects of the nitric oxide donors on lipopolysaccharide-induced fever in rabbits, and the effect of brain nitric oxide synthase inhibition on the febrile response in pyrogen tolerant animals. 2. The febrile response was reduced by intravenous injections of the nitric

Nitric oxide synthase-cyclo-oxygenase pathways in organum vasculosum laminae terminalis: possible role in pyrogenic fever in rabbits.

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1. Fever was induced in rabbits by administration of Escherichia coli endotoxin (lipopolysaccharide; LPS; 0.001-10 micrograms) into the organum vasculosum laminae terminalis (OVLT). Deep body temperature was evaluated over a period of 7 h. 2. The LPS-induced febrile response was mimicked by

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