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The effects of direct administration of vasopressin into the preoptic anterior hypothalamus on thermoregulatory functions were assessed in conscious rats at various ambient temperatures. Intrahypothalamic administration of vasopressin caused fever, increased metabolic heat production and decreased
CC Chemokine ligand 22 (Ccl22) is a selective, high affinity ligand at the CC chemokine receptor 4 (Ccr4). We have identified cDNAs encoding both ligand and receptor of the Ccl22-Ccr4 pair in cDNA libraries of the anterior hypothalamus/pre-optic area (AH/POA) by PCR. The AH/POA is the key brain
Cytokine-induced neutrophil chemoattractant-1 (CINC-1), a member of the ELR+CXC subfamily [ELR motif (glutamic acid-leucine-arginine) adjacent to the cysteine-X-cysteine (CXC) motif located at the N-terminus of the protein], is an acute-phase protein and its synthesis is induced by endogenous and
We have studied the mechanism by which interleukin-8 (IL-8) induces fever in rats. Intracerebroventricular injections of IL-8 (5.5-50 ng) evoked dose-dependent increases in body temperature, which reached a plateau 5 h after injection, i.e., later than intracerebroventricular interleukin-1 beta
The neuroanatomical distribution of sites in the diencephalon and mesencephalon within which a prostaglandin (PG) of the E series elicits hyperthermia was characterized in Macaca mulatta and Macaca nemestrina. In 420 experiments undertaken in 13 animals, 225 loci were examined for their reactivity
The organophosphate pesticide (OP) chlorpyrifos leads to an acute period of hypothermia followed by a delayed fever in the rat. Methyl scopolamine, a peripheral muscarinic antagonist, is thought to have little effect on body temperature of the rat because it does not cross the blood brain barrier.
Mannan components of C. albicans (5 mg/kg, i.p.) and S. cerevisiae (2.5 mg/kg, i.p.) cell walls produced pyrogenic responses which were completely inhibited by indomethacin (5 mg/kg, s.c.) pretreatment in rats. A non-selective NOS inhibitor, L-NAME (10 mg/kg, s.c.), also inhibited the pyrogenic
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
Interferon-alpha (IFN-alpha, 2.0 x 10(4) units) was bilaterally microinjected into the medial preoptic area and anterior hypothalamus in conscious rats treated 10 min prior with an opioid receptor antagonist, naloxone (NLX, 2 mg/kg, IM) or a prostaglandin synthetase inhibitor, acetaminophen (ACAP,
This investigation examined the extent to which the activity of a prostaglandin (PG) in the anterior hypothalamic, preoptic area (AH/POA) of the rat plays a role in the intense fever induced by macrophage inflammatory protein-1 (MIP-1) applied directly to this anatomical region. For the
A number of cytokines including the family of interleukins and the macrophage inflammatory proteins act in the brain to produce fever. The purpose of this study was to determine whether the recently discovered hematopoietic progenitor cell stimulator, interleukin-11 (IL-11), alters the body
Macrophage inflammatory protein-1 (MIP-1) evokes an intense fever, independent of a prostaglandin mechanism, and is now thought to play an important role in the defence response to bacterial pyrogens. The purpose of this study was 2-fold: (i) to determine whether the potent doublet of this cytokine,
OBJECTIVE
Misoprostol, a prostaglandin analogue used for the treatment of postpartum hemorrhage and termination of pregnancy, can cause high fevers. Genetic susceptibility may play a role in misoprostol-induced fever.
METHODS
Body temperature of women treated with misoprostol for termination of
Fever can be recognized as a higher set-point of the normal temperature regulation which is controlled by the center in the anterior part of hypothalamus. The change in this set-point is induced by interleukin-1 (IL-1) which is the common mediator of exogenic and endogenic pyrogenic factors. IL-1 is
Three experiments were carried out to investigate stress hyperthermia in prepubertal pigs. Experiment 1 examined the effect of frustrative nonreward (psychological stress) on deep body temperature in animals (n = 7) trained to make operant responses for food following a 17.5-h period of deprivation.