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Página 1 a partir de 53 resultados
Induction of heart heme oxygenase-1 (HSP32) by hyperthermia: possible role in stress-mediated elevation of cyclic 3':5'-guanosine monophosphate.
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Presently we have investigated the carbon monoxide generating capacity of the cardiovascular system under normal and stress conditions by examining the microsomal heme oxygenase system at the transcript, protein and activity levels; and have assessed response of heart nitric oxide (NO) synthase
Dissimilar effects on body temperature in the cat produced by guanosine 3',5'-monophosphate, acetylcholine and bacterial endotoxin.
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1 Guanosine 3',5'-monophosphate (cyclic GMP) and N2-2'-O-dibutyryl guanosine 3',5'-monophosphate (db cyclic GMP) have been injected into the third cerebral ventricle (i.c.v.) of the unanaesthetized cat and the effects of rectal temperature and on behavioural and autonomic activities observed and
Heat shock protein 32/heme oxygenase-1 protects mouse Sertoli cells from hyperthermia-induced apoptosis by CO activation of sGC signalling pathways.
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Heat shock protein 32 (Hsp32)/heme oxygenase-1 (HO-1) may be a key enzyme for the protection of cells against stress. Its anti-apoptotic effect has been attributed to its product, carbon monoxide (CO), in many types of cells. However, whether its anti-apoptotic mechanism plays a role in Sertoli
Central nNOS is involved in restraint stress-induced fever: evidence for a cGMP pathway.
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It has been shown that the NO pathway plays a major role in restraint stress-induced fever, and that the neuronal nitric oxide synthase (nNOS) seems to be the NOS isoform that accounts for the pyretic effect of NO in psychological stress-induced fever. However, no information exists as to
Enhanced mobilization of intracellular Ca2+ induced by halothane in hepatocytes isolated from swine susceptible to malignant hyperthermia.
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Halothane, in a dose-dependent manner, induced the release of intracellular Ca2+ in hepatocytes prepared from swine. The magnitude of the release induced by halothane was greater for hepatocytes prepared from animals susceptible to malignant hyperthermia (MH) than for those from normal swine. Two
Is acute morphine hyperthermia of unrestrained rats due to selective activation of brown adipose tissue thermogenesis?
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Experiments were conducted to determine if the hyperthermia after acute morphine sulfate (MS) administration was due to selective activation of brown adipose tissue (BAT) thermogenesis. Interscapular BAT temperature (TIBAT) and core (rectal) temperature (TR) were measured concurrently in groups of
Involvement of sympathetic nervous system and brown fat in endotoxin-induced fever in rats.
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The object of this study was to assess the role of brown adipose tissue (BAT) and the sympathetic nervous system in the rise in heat production associated with endotoxin-induced fever. Oxygen consumption (VO2) was found to be significantly increased (28%) over a 4-h period after two doses of
Inhibitors of the tick-borne, hemorrhagic fever-associated flaviviruses.
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No antiviral therapies are available for the tick-borne flaviviruses associated with hemorrhagic fevers: Kyasanur Forest disease virus (KFDV), both classical and the Alkhurma hemorrhagic fever virus (AHFV) subtype, and Omsk hemorrhagic fever virus (OHFV). We tested compounds reported to have
Evidence that cyclic nucleotides are not mediators of fever in rabbits.
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The N6-2'-O-dibutyryl derivative of adenosine 3',5'-monophosphate (db cyclic AMP) and related compounds have been micro-injected into the preoptic/anterior hypothalamic nuclei (PO/AH) of the unanaesthetized, restrained rabbit and the effects on deep body temperature observed. Db cyclic AMP (100-400
Metabolic Profiles in Cell Lines Infected with Classical Swine Fever Virus.
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Viruses require energy and biosynthetic precursors from host cells for replication. An understanding of the metabolic interplay between classical swine fever virus (CSFV) and host cells is important for exploring the complex pathological mechanisms of classical swine fever (CSF). In the current
Escherichia coli peritonitis activates thermogenesis in brown adipose tissue: relationship to fever.
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Fever is a complex and important nonspecific, host defense mechanism against infection. The generation of the heat necessary to increase body temperature may involve thermogenesis in brown adipose tissue. To investigate whether the febrile response to Escherichia coli peritonitis involves
Accumulation of purine catabolites in solid tumors exposed to therapeutic hyperthermia.
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Intensified adenosine triphosphate (ATP) degradation following therapeutic hyperthermia is often observed in solid tumors. As a result, accumulation of purine catabolites can be expected together with formation of protons at several stages during degradation to the final product, uric acid. Proton
Chikungunya virus inhibition by synthetic coumarin-guanosine conjugates.
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Since its discovery in Tanganyika, Africa in 1952, chikungunya virus (CHIKV) outbreaks have occurred in Africa, Asia, Europe, and America. Till now chikungunya fever has spread in nearly 40 countries. Because of lack of effective vaccines and antiviral drugs to intervene this disease, 21 new
Characterization of resistance to non-obligate chain-terminating ribonucleoside analogs that inhibit hepatitis C virus replication in vitro.
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The urgent need for efficacious drugs to treat chronic hepatitis C virus (HCV) infection requires a concerted effort to develop inhibitors specific for virally encoded enzymes. We demonstrate that 2'-C-methyl ribonucleosides are efficient chain-terminating inhibitors of HCV genome replication.
Energy balance and brown adipose tissue thermogenesis during chronic endotoxemia in rats.
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The effects of continuously administered endotoxin on 7-day energy balance were investigated in male rats. Three groups of rats were implanted with osmotic pumps; two groups received saline-filled pumps, whereas the third received endotoxin. One of the saline groups was pair fed to match the food
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