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Protective effect of FR35447 on experimental cerebral infarction.
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The protective effect of 2-(5-chloro-2-phenoxyanilino)-2-imidazoline [FR35447] on cerebral infarction was examined in animal models. FR35447 in p.o. doses of 1 mg/kg or more caused a marked reduction of arachidonate-induced cerebral infarction in rats. Since FR35447 (10(-6) M) inhibited platelet
Platelet responsiveness to yohimbine hydrochloride and MRS2179 in the context of the interaction between collagen and epinephrine in acute coronary syndrome.
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Acute coronary syndrome (ACS) covers a spectrum of clinical conditions ranging from unstable angina, Non-ST segment elevation myocardial infarction (NSTEMI), or ST segment elevation myocardial infarction (STEMI). This study encompasses patients with acute coronary syndrome, who were receiving the
Activated cranial cervical cord neurons affect left ventricular infarct size and the potential for sudden cardiac death.
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To evaluate whether cervical spinal neurons can influence cardiac indices and myocyte viability in the acutely ischemic heart, the hearts of anesthetized rabbits subjected to 30 min of LAD coronary arterial occlusion (CAO) were studied 3h after reperfusion. Control animals were compared to those
Altered platelet alpha 2 adrenoreceptor in acute myocardial infarction and its relation to plasma catecholamine concentrations.
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Changes in platelet alpha 2 adrenoreceptors and their relation to plasma catecholamine concentrations were studied in 11 patients with acute transmural myocardial infarction. A radiolabelled alpha 2 adrenoreceptor antagonist, [3H]-yohimbine, was used to assay alpha 2 adrenoreceptors on platelet
The alpha 2-adrenergic receptor antagonist yohimbine inhibits epinephrine-induced platelet aggregation in healthy subjects.
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Onset of sudden death, myocardial infarction, and stroke occurs more likely in the morning hours. Similarly, a morning increase in epinephrine-induced platelet aggregation was observed accompanied by an increase in plasma catecholamines. Inhibition of the morning increase in platelet aggregation
Clonidine preconditioning decreases infarct size and improves neurological outcome from transient forebrain ischemia in the rat.
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Clonidine, a alpha(2)-adrenergic receptor agonist, has been demonstrated to be neuroprotective when administered during ischemia. It is not known whether clonidine can precondition brain against ischemia. We examined this possibility using a transient forebrain ischemia model. Rats received 40
Dexmedetomidine preconditioning activates pro-survival kinases and attenuates regional ischemia/reperfusion injury in rat heart.
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Pharmacological preconditioning limits myocardial infarct size after ischemia/reperfusion. Dexmedetomidine is an α(2)-adrenergic receptor agonist used in anesthesia that may have cardioprotective properties against ischemia/reperfusion injury. We investigate whether dexmedetomidine administration
The cardioprotective effect of dexmedetomidine on regional ischemia/reperfusion injury in type 2 diabetic rat hearts.
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BACKGROUND
Dexmedetomidine (DEX) is an α2-adrenergic receptor agonist commonly used during perioperative periods due to its sedation and analgesia effect. It is confirmed that DEX has cardioprotective effects against ischemia/reperfusion (I/R) injury. We investigated whether DEX administration is
Clonidine preconditioning alleviated focal cerebral ischemic insult in rats via up-regulating p-NMDAR1 and down-regulating NMDAR2A / p-NMDAR2B.
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A brain ischemia rat model was established by middle cerebral artery occlusion (MCAO) for 2h and reperfusion for 4h to investigate the underlying mechanism of the neuroprotection action of clonidine, a classical alpha-2 adrenergic agonist, on cerebral ischemia. Clonidine and yohimbine were
Last performance with VIAGRA: post-mortem identification of sildenafil and its metabolites in biological specimens including hair sample.
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A 43-year-old man was found dead in a hotel room during a sexual relation with a colleague.He was treated both for cardiovascular disease and for erectile dysfunction with VIAGRA. A pillbox was found in the room with several tablets of verapamil (Isoptine), trimetazidine (Vastarel), yohimbine and
Platelet alpha 2 adrenoceptor characteristics during the morning increase in platelet aggregability.
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The incidence of myocardial infarction and sudden cardiac death increases in the morning, as do platelet aggregability and sympathetic activity. We considered the possibility that increased platelet aggregability in the morning was due to an increase in platelet alpha 2 adrenergic receptor number or
Ambulatory infusion of noradrenaline for long-term treatment of Shy-Drager syndrome.
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A 70-year-old female patient with advanced Shy-Drager syndrome exhibited severe orthostatic hypotension, low serum catecholamine levels, and autonomic dysfunction. She was bedridden despite oral medication with fludrocortisone, etilefrin, dihydroergotamine, L-dopa, yohimbine, and amezinium methyl
Dexmedetomidine preconditioning may attenuate myocardial ischemia/reperfusion injury by down-regulating the HMGB1-TLR4-MyD88-NF-кB signaling pathway.
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OBJECTIVE
To investigate whether dexmedetomidine (DEX) preconditioning could alleviate the inflammation caused by myocardial ischemia/reperfusion (I/R) injury by reducing HMGB1-TLR4-MyD88-NF-кB signaling.
METHODS
Seventy rats were randomly assigned into five groups: sham group, myocardial I/R group
Dexmedetomidine Improves Cerebral Ischemia-Reperfusion Injury in Rats via Extracellular Signal-Regulated Kinase/Cyclic Adenosine Monophosphate Response Element Binding Protein Signaling Pathway.
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Peri-interventional coronary vasomotion.
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A percutaneous coronary intervention (PCI) is a unique condition to study the effects of ischemia and reperfusion in patients with severe coronary atherosclerosis when coronary vasomotor function is compromised by loss of endothelial and autoregulatory vasodilation. We studied the effects of
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