OBJECTIVES The aim of this study was to determine the effect of transient myocardial ischemia on circulating natriuretic peptide levels. BACKGROUND Natriuretic peptides are released by the heart in response to wall stress. We hypothesized that transient myocardial ischemia would cause acute changes in circulating natriuretic peptide levels. METHODS B-type natriuretic peptide (BNP), N-termin...

BACKGROUND AND PURPOSE The risk of stroke after a transient ischemic attack (TIA) is high. Appropriately directed therapies may reduce this risk. However, sensitive means of detecting the presence of subtle neuronal ischemia are lacking. We investigated the potential use of quantitative diffusion-weighted (DW) MR imaging in the detection of deficits produced by transient cerebral ischemia. ME...

BACKGROUND AND PURPOSE The physiological function of cellular prion protein (PrPc) is not yet understood. Recent findings suggest that PrPc may have neuroprotective properties, and its absence increases susceptibility to neuronal injury. The purpose of this study was to elucidate the role of PrPc in ischemic brain injury in vivo. METHODS PrP knockout (Prnp(0/0)) and Prnp(+/+) wild-type (WT) m...

Headache and Transient Ischemic A Hacks • Headache occurring in association with episodes of transient cerebral ischemia has not been emphasized as part of the symptom complex. In an effort to ascertain the frequency and characteristics of these headaches and to determine whether there is any localizing, diagnostic, or prognostic significance to them, the records of 240 TIA patients were review...

Citicoline (CDP-choline) has undergone 13 phase III clinical stroke trials, and is being evaluated for treatment of Alzheimer’s and Parkinson’s diseases. Phospholipid degradation and generation of reactive oxygen species (ROS) are major factors causing neuronal injury in CNS trauma and neurodegenerative diseases. Oxidative metabolism of arachidonic acid, which is released by the action of phosp...

The protective mechanism underlying remote ischemic preconditioning (RIPC) is unclear. This study aims to verify whether the protein expression profile in the serum could be altered by RIPC and to detect potential protein mediators. Transient limb ischemia consisting of three cycles of 5-min ischemia followed by 5-min reperfusion was performed on sixty healthy volunteers. Serum samples were col...

Raynaud phenomenon (RP) in connective tissue disease (CTD) can be resistant to oral vasodilator therapy, resulting uncontrollable digital ischemia. Intravenous (IV) prostanoids are often used, but the benefit transient and not all patients respond. Selexipag is an orally active selective IP-type prostanoid receptor agonist used pulmonary arterial hypertension. We describe 2 where selexipag sig...

Recent studies have found that administration of stem cells or extracellular vehicles (EVs) derived from stem cells exert neuroprotective effects after transient global ischemia. However, the underlying mechanisms of this effect remain unclear, especially at the level of synaptic functions. In this study, we compared the suppressive effects on cyclooxygenase-2 (COX-2) upregulation by EVs derive...

Calbindin D-28K (CB), a Ca2+-binding protein, maintains Ca2+ homeostasis and protects neurons against various insults. Hyperthermia can exacerbate brain damage produced by ischemic insults. However, little is reported about the role of CB in the brain under hyperthermic condition during ischemic insults. We investigated the effects of transient global cerebral ischemia on CB immunoreactivity as...

BACKGROUND AND PURPOSE Tacrolimus, an immunosuppressant agent, has been shown to reduce tissue injury and leukocyte accumulation after transient ischemia. This study was designed to evaluate quantitatively the inhibitory effects of tacrolimus on leukocyte rolling and on subsequent leukocyte accumulation in vivo after transient retinal ischemia and the protective effects of tacrolimus on ischemi...