Leathanach 1 ó 40 torthaí
Inhibitors of cyclooxygenases prevent fever. The purpose of this study was to test the hypothesis that selective and dual inhibitors of the other enzyme systems of arachidonic acid oxygenation (i.e., lipoxygenase and epoxygenase) affect the time course or magnitude of fever in mice. Swiss Webster
1. Sodium arachidonate, the prostaglandin precursor substance, when injected intraventricularly into rabbits, results in dose-dependent hyperthermia, which is rapid in onset and of several hours duration. 2. Arachidonate fever was inhibited by intraventricular injection of indomethacin, but not by
Conscious, unrestrained cats given multiple injections of sodium arachidonate into a lateral cerebral ventricle responded with prolonged increases in both temperature. Development of tolerance was indicated by a gradual reduction in the response to successive doses. Cross-tolerance developed to
In conclusion, we have described a novel series of acetohydroxamic acids that are potent and selective inhibitors of arachidonate 5-lipoxygenase in vitro and in vivo. In addition, we have shown that these compounds attenuate "leukotriene-dependent" anaphylactic bronchospasm, the accumulation of
Oren-gedoku-to is a traditional medicine used for treating inflammatory conditions and is given by prescription in Japan, People's Republic of China, and Korea. Its anti-inflammatory effect is related to the arachidonate cascade and inhibition of cyclo-oxygenase, but research on other
Effects of microelectrophoretic application of ultrapure human interleukin-1 (IL-1), an endogenous pyrogen, on the activity of 80 neurons in the preoptic and anterior hypothalamus (PO/AH) were investigated in the urethane anesthetized rat. IL-1 predominantly decreased the activity of warm-sensitive
Leukocytic pyrogen (LP) is a polypeptide product of activated mononuclear phagocytes that has been established as the endogenous mediator of fever. Recent studies show LP may be identical to lymphocyte-activating factor (LAF or interleukin 1). In the present experiments, chromatographic separations
1. Intravenous (I.V.) human recombinant interleukin-1 beta (IL-1 beta) in high doses caused biphasic fever in rabbits. In lower doses it produced only the first phase of fever. 2. Intracerebroventricular (I.C.V.) or intrapreoptic-anterior hypothalamic (IPOAH) injection of IL-1 beta produced a rather
1. Injection of sodium arachidonate (100-400 mug) into lateral cerebral ventricles of unanaesthetized cats caused shivering and rapid development of dose-related hyperthermic responses. Unless arachidonate is hyperthermogenic per se, this indicates that in vivo formation of prostaglandins, or
Until recently, studies on the role of the metabolites of arachidonic acid (AA), eicosanoids in fever have primarily focused on prostaglandins, prostaglandin E2 (PGE2) in particular, derived from the pathway related to cyclooxygenases (COX). COX exists in two known isoforms; a constitutive COX-1,
Hemorrhage in patients with Lassa fever is associated with the presence of a circulating plasma inhibitor of platelet aggregation. This study was to determine whether patients with Argentine hemorrhagic fever (AHF) develop a similar inhibitor. Normal platelets showed significantly weaker aggregation
To investigate the relation of arachidonate metabolism to the induction of fever by interleukin-1, indomethacin was administered in either an intracerebroventricular (icv) or a subcutaneous (sc) route in conscious rabbits. Fever induced by icv administration of recombinant human interleukin-1 beta
Sympathetic responses during fever induced by two representative endogenous pyrogens, interleukin-1 beta (IL-1 beta) and tumor necrosis factor alpha (TNF alpha), and their effective inducer, lipopolysaccharide (LPS), were investigated in conscious rabbits. Rectal temperature, ear skin temperature as
Spermatogenesis is known to be vulnerable to temperature. Exposures of rat testis to moderate hyperthermia result in loss of germ cells with survival of Sertoli cells (SC). Because SC provide structural and metabolic support to germ cells, our aim was to test the hypothesis that these exposures
Many products of lipid oxidation have been associated with human diseases. These include F2-isoprostanes (F2-IsoPs), hydroxyeicosatetraenoic acid products (HETEs), and cholesterol oxidation products (COPs). Here we present measurements of F2-IsoPs, HETEs, COPs, and arachidonate in single plasma