Takuya Moriwaki

Learn More
BACKGROUND AND PURPOSE Subarachnoid hemorrhage caused by cerebral aneurysm rupture remains a life-threatening emergency despite advances in treatment. However, the mechanisms underlying aneurysm initiation, progression, and rupture remain unclear. We developed a method to induce experimental cerebral aneurysms in rats, monkeys, and mice. Interleukin-1beta(More)
BACKGROUND AND PURPOSE The degradation of extracellular matrix (ECM) is a hallmark of a cerebral aneurysm; however, little is known regarding the molecular mechanism leading to this change. Tissue inhibitor of matrix metalloproteinase (TIMP) regulates the ECM degradation in vascular walls by inhibiting the activity of matrix metalloproteinases (MMPs). We(More)
BACKGROUND Subarachnoid hemorrhage caused by the rupture of cerebral aneurysm (CA) remains a life-threatening disease despite recent diagnostic and therapeutic advancements. Recent studies strongly suggest the active participation of macrophage-mediated chronic inflammatory response in the pathogenesis of CA. We examined the role of nuclear factor-kappaB(More)
The fact that mitochondrial dysfunction has been implicated in a variety of human diseases suggests that they would be expected as a target organelle for these diseases. Bongkrekic acid (BKA) is a chemical that functions as a ligand of the adenine nucleotide translocator and is known to potently inhibit the mitochondrial permeability transition that is(More)
BACKGROUND Recently it is reported that proliferative activity remains in vascular walls of cerebral arteriovenous malformations (AVMs). These reports indicate that endothelial cells in AVMs have the neoangiogenic property. In this study, we assess the role of thioredoxin-1 (Trx-1) and hypoxia-inducible factor 1a (HIF-1α) in AVMs. These factors are reported(More)
OBJECT Cerebral aneurysm is a major cause of subarachnoid hemorrhage, but the mechanisms of its development remain unclear. Mechanical stretch has been reported to induce vascular smooth-muscle cell apoptosis via endothelin B receptors (ETBRs). The objectives of this study were to clarify the expression and localization of ETBR in cerebral aneurysms and to(More)
Bongkrekic acid (BKA), isolated from the bacterium Burkholderia cocovenenans, is an inhibitor of adenine nucleotide translocator, which inhibits apoptosis, and is thus an important tool for the mechanistic investigation of apoptosis. An efficient total synthesis of BKA has been achieved by employing a three-component convergent strategy based on(More)
We describe a family with facioscapulohumeral muscular dystrophy (FSHD) and hereditary long QT syndrome (LQT) for three generations. The proband, a 50-year-old woman, had noticed difficulty in raising the upper extremities since the age of 40. At the age of 48, she was admitted to our hospital because of arrhythmia attack. She, her mother, and one of her(More)
Cerebral aneurysms are a major cause of subarachnoid hemorrhage, but the mechanism of their development remains unclear. In this study, we investigated candidate genes whose expression is significantly changed during the development of experimentally induced cerebral aneurysms using adaptor-tagged competitive polymerase chain reaction (ATAC-PCR).(More)
Subarachnoid hemorrhage due to the rupture of a cerebral aneurysm is a life-threatening disease. Despite this, the detailed mechanisms underlying the initiation and progression of cerebral aneurysm are unclear. The relation of hypercholesterolemia and apolipoprotein E (ApoE) to cerebral aneurysm formation, has been unclear until now. We used, in the present(More)