Satoshi Shirao

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Although recent investigations have suggested that a Rho-kinase–mediated Ca sensitization of vascular smooth muscle contraction plays a critical role in the pathogenesis of cerebral and coronary vasospasm, the upstream of this signal transduction has not been elucidated. In addition, the involvement of protein kinase C (PKC) may also be related to cerebral(More)
Although recent investigations have suggested that a Rho-kinase-mediated Ca2+ sensitization of vascular smooth muscle contraction plays a critical role in the pathogenesis of cerebral and coronary vasospasm, the upstream of this signal transduction has not been elucidated. In addition, the involvement of protein kinase C (PKC) may also be related to(More)
BACKGROUND The management of patients with poor-grade subarachnoid hemorrhage (SAH) continues to be controversial. The objective of this study was to examine predictors of outcome of poor-grade SAH after surgical obliteration of the aneurysm. METHODS The study was performed as a retrospective review of 283 patients with poor-grade SAH who underwent(More)
OBJECTIVE The sphingosylphosphorylcholine-Rho-kinase pathway plays an important role in Ca(2+) sensitization of vascular smooth muscle contraction. Eicosapentaenoic acid (EPA) inhibits sphingosylphosphorylcholine -Rho-kinase-activated Ca(2+)-sensitization in vitro and in subarachnoid hemorrhage (SAH) models in vivo and has also been shown to inhibit the(More)
We recently reported that sphingosylphosphorylcholine (SPC) is a novel messenger for Rho-kinase-mediated Ca(2+) sensitization of vascular smooth muscle (VSM) contraction. Subcellular localization and kinase activity of Src family protein kinases (SrcPTKs), except for c-Src, is controlled by a reversible S-palmitoylation, an event inhibited by(More)
We recently reported that sphingosylphosphorylcholine (SPC) is a novel messenger for Rho-kinase–mediated Ca sensitization of vascular smooth muscle (VSM) contraction. Subcellular localization and kinase activity of Src family protein kinases (SrcPTKs), except for c-Src, is controlled by a reversible S-palmitoylation, an event inhibited by eicosapentaenoic(More)
BACKGROUND AND PURPOSE Systemic circulation management has not been established for patients with poor grade aneurysmal subarachnoid hemorrhage (SAH) or delayed cerebral ischemia (DCI) after SAH. The aims of the study were to examine hemodynamic variables in these patients and to establish treatment strategies. METHODS A multicenter prospective cohort(More)
PURPOSE The purpose of this work was to evaluate the usefulness of perfusion CT in the evaluation of patients with chronic cerebral ischemia by comparing it with xenon CT (Xe-CT). METHOD Cerebral blood flow (CBF) of perfusion CT (CBFper) and time to peak (TTP) were compared with the CBF of Xe-CT (CBFxe) in 18 patients. Cerebral blood volume (CBV) was(More)
Ebselen is a mimic of glutathione peroxidase that reacts with peroxynitrite and inhibits nitric oxide (NO) synthase. Ebselen has beneficial effects on the neurological outcome of patients with stroke. In this study, the mechanisms by which ebselen can elicit neuroprotective effects against ischemic brain injury were investigated in male Wistar rats.(More)
Intracranial meningiomas are the most common types of neoplasms that cause mental disorders. Although higher brain function can be restored and even improved in some patients after tumor resection, the mechanisms remain unclear. We investigated changes in the brains of patients after resection of an intracranial meningioma using (123)I-Iomazenil(More)