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Histamine receptors influence blood-spinal cord barrier permeability, edema formation, and spinal cord blood flow following trauma to the rat spinal cord.
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The role of histamine in edema formation, blood-spinal cord barrier (BSCB) permeability, and spinal cord blood flow (SCBF) following spinal cord injury (SCI) was examined using modulation of histamine H1, H2, and H3 receptors in the rat. Focal trauma to the spinal cord at the T10-11 level
Mast cells and histamine play an important role in edema and leukocyte recruitment induced by Potamotrygon motoro stingray venom in mice.
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This work aimed to investigate mechanisms underlying the inflammatory response caused by Potamotrygon motoro stingray venom (PmV) in mouse paws. Pre-treatment of animals with a mast cell degranulation inhibitor (cromolyn) diminished edema (62% of inhibition) and leukocyte influx into the site of PmV
O-(beta-hydroxyethyl)-rutoside (Venoruton) fails to block histamine or bradykinin-induced edema formation in the canine forelimb perfused at constant arterial inflow.
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O-(beta-hydroxyethyl)-rutoside (Venoruton) has been reported to alleviate edema formation in chronic venous insufficiency. In an attempt to elucidate Venoruton's potential as an antiinflammatory agent, we infused Venoruton (20 mg/minute) intraarterially into the canine forelimb perfused at constant
[H2 receptor mediates the protective effect of histamine against the cellular edema and viability reduction induced by oxygen-glucose deprivation in rat hippocampal slices].
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OBJECTIVE
To determine the effect of histamine on ischemia-induced cellular edema and viability reduction in rat hippocampal slices, and the involved subtypes of histamine receptor in this effect.
METHODS
In vitro ischemic injury of hippocampal slices was induced by oxygen-glucose deprivation (OGD).
Utilization of 67Ga-citrate for the measurement of histamine-induced edema in anesthetized rats.
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Radioactivity of the histamine-induced paw edema was measured after intravenous injection of 67Ga-citrate in anesthetized rats. The radioactivity was fluctuated almost parallel with the edema rate following subcutaneous injection of histamine. Both the radioactivity and the edema rate were almost
Airway blood flow distribution and lung edema after histamine infusion in awake sheep.
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The present study was designed to evaluate the distribution of bronchial blood flow to major airways and peripheral lung and to quantitate lung edema during a 2-h histamine infusion (2 micrograms.kg-1.min-1) in unanesthetized sheep. By the use of radioactive microspheres, the blood flow to trachea
Substance P provokes cutaneous erythema and edema through a histamine-independent pathway.
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Substance P is a neuropeptide (contained in/and released from the A delta and C nerve fibers of the skin), which provokes erythema, edema, and pruritus after intradermal injection. Local pretreatment with capsaicin produces decreased substance P-dependent erythema, with edema similar to that
Histamine-induced changes in rat tracheal goblet cell mucin store and mucosal edema.
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The pathology of chronic asthma in human and mouse is characterized by inflammation and remodeling of airway tissues. As a result of repeated inflammatory insults to the lower airways, smooth muscle thickening, mucin secretion and airway hyperreactivity may develop. In ovalbumin (OVA)-sensitized
Effects of antihistamines on the lung vascular response to histamine in unanesthetized sheep. Diphenhydramine prevention of pulmonary edema and increased permeability.
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To see whether antihistamines could prevent and reverse histamine-induced pulmonary edema and increased lung vascular permeability, we compared the effects of a 4-h intravenous infusion of 4 mug/kg per min histamine phosphate on pulmonary hemodynamics, lung lymph flow, lymph and plasma protein
Role of histamine in traumatic brain edema. An experimental study in the rat.
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The possibility that histamine plays a role in the formation of traumatic brain edema was investigated in the rat. A 3 mm deep and 3 mm long stab injury was performed in the right parietal cortex under urethane anaesthesia. The brain water content and histamine levels in plasma and brain were
Histamine-induced pulmonary edema distal to pulmonary arterial occlusion.
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Histological studies provide evidence that the bronchial veins are a site of leakage in histamine-induced pulmonary edema, but the physiological importance of this finding is not known. To determine if a lung perfused by only the bronchial arteries could develop pulmonary edema, we infused histamine
The Effect of Schinus terebinthifolius Raddi (Anacardiaceae) Bark Extract on Histamine-Induced Paw Edema and Ileum Smooth Muscle Contraction.
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Schinus terebinthifolius Raddi (Anacardiaceae), popularly known as red aroeira, is used in traditional medicine to treat inflammatory, gastric, and respiratory disorders. The aim of this study was to evaluate the antihistaminic activity of S. terebinthifolius (St) bark extract by using in vivo and
Antagonism of histamine edema formation by catecholamines.
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Histamine (4 microgram base/min) infused into the brachial artery for 60 min greatly increases skin lymph flow and lymph protein concentration in forelimbs perfused either naturally or at constant inflow. In contrast, the simultaneous intrabrachial infusion of histamine and norepinephrine (4
Nitric oxide- and hydrogen peroxide-mediated gene expression by glucocorticoids and FK506 in histamine paw edema of mice.
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An immunosuppressant FK506 binds with a component (hsp 56) of glucocorticoid receptor (GR) complex. Dexamethasone (Dex) never suppressed histamine paw edema of mice before 1 hr after its dosing as new protein(s) synthesis is required. However, FK506 (0.01-10 mg/kg, oral) 1.5 hr before 0.1 mg/kg Dex
Fructose-1,6-diphosphate enhanced oxyradicals and nitric oxide-dependent suppressions by dexamethasone of ischemic and histamine paw edema of mice.
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Dexamethasone (Dex, 0.1 mg/kg, s.c.) suppressions of ischemic paw edema in mice at 1, 3, 6, 8, 18 hr were; 2, 22, 12, 11, 7%. Dex suppression in fructose-1,6-diphosphate (FDP, 100 mg/kg, i.p.)-treated mice were; 5, 49, 51, 42, 33%. Suppressions by this dose of FDP alone were less than 10% during
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