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Therapeutic potential of stem cells in subarachnoid hemorrhage

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Neural Regeneration Research 2025年第4期20卷 936-945页

作者： Hideki Kanamaru hidenori Suzuki Department of Neurosurgery Mie University Graduate School of MedicineTsuJapan

Aneurysm rupture can result in subarachnoid hemorrhage,a condition with potentially severe consequences,such as disability and *** the acute stage,early brain injury manifests as intracranial pressure elevation,global cerebral ischemia,acute hydrocephalus,and direct blood–brain contact due to aneurysm *** may subsequently cause delayed cerebral infarction,often with cerebral vasospasm,significantly affecting patient *** complications such as brain volume loss and chronic hydrocephalus can further impact *** the mechanisms of subarachnoid hemorrhage-induced brain injury is paramount for identifying effective *** cell therapy,with its multipotent differentiation capacity and anti-inflammatory effects,has emerged as a promising approach for treating previously deemed incurable *** review focuses on the potential application of stem cells in subarachnoid hemorrhage pathology and explores their role in neurogenesis and as a therapeutic intervention in preclinical and clinical subarachnoid hemorrhage studies.

关键词： delayed cerebral ischemia early brain injury matricellular protein neurogenesis stem cell therapy subarachnoid hemorrhage

Challenges for beyond 5G:ultra-densification of radio access network

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通信学报 2020年第11期41卷 1-11页

作者： Fumiyuki Adachi Ryo Takahashi hidenori Matsuo Research Organization of Electrical Communication Tohoku UniversitySendai 980-8577Japan

Ultra-densification of radio access network(RAN)is a key to efficiently support the exponentially growing mobile data traffic in 5 G ***,extremely high frequency band like mm Wave band was utilized to solve the bandwidth shortage ***,untra-dense reusing the same radio resource produced severe *** the mm Wave link was very harsh due to frequent blockage by *** a new RAN architecture needed to be introduced to realize ultra-reliable communications in such a severe radio propagation *** architecture of distributed MIMO based RAN was ***,enhanced interference coordination(e IC)was ***,the effectiveness of distributed MIMO based RAN with e IC by computer simulation was showed.

关键词： 5G advanced systems distributed MIMO radio access network interference coordination cooperative signal transmission

Potential therapeutic molecular targets for blood-brain barrier disruption after subarachnoid hemorrhage

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Neural Regeneration Research 2019年第7期14卷 1138-1143页

作者： Hideki Kanamaru hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Aneurysmal subarachnoid hemorrhage remains serious hemorrhagic stroke with high morbidities and *** rupture causes arterial bleeding-induced mechanical brain tissue injuries and elevated intracranial pressure,followed by global cerebral ***-subarachnoid hemorrhage ischemia,tissue injuries as well as extravasated blood components and the breakdown products activate microglia,astrocytes and Toll-like receptor 4,and disrupt blood-brain barrier associated with the induction of many inflammatory and other *** blood-brain barrier is disrupted,brain tissues are directly exposed to harmful blood contents and immune cells,which aggravate brain injuries ***-brain barrier disruption after subarachnoid hemorrhage may be developed by a variety of mechanisms including endothelial cell apoptosis and disruption of tight junction *** molecules and pathways have been reported to disrupt the blood-brain barrier after subarachnoid hemorrhage,but the exact mechanisms remain *** independent and/or interconnected signaling pathways may be involved in blood-brain barrier disruption after subarachnoid *** review provides recent understandings of the mechanisms and the potential therapeutic targets of blood-brain barrier disruption after subarachnoid hemorrhage.

关键词： blood-brain barrier early brain injury endothelial cell subarachnoid hemorrhage tight junction inflammation matricellular protein Toll-like receptor 4 TLR4

Periostin in cerebrovascular disease

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Neural Regeneration Research 2020年第1期15卷 63-64页

作者： Fumihiro Kawakita hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Cerebrovascular diseases,which include ischemic and hemorrhagic strokes,remain serious conditions with high mortality and disability worldwide(He et al.,2018).Ischemic stroke accounts for around 80%of all strokes(He et al.,2018).Hemorrhagic stroke consisting of intracerebral hemorrhage and subarachnoid hemorrhage(SAH)occurs less frequently but may cause poorer outcomes than ischemic stroke(Ji et al.,2017;Luo et al.,2018).It is also well known that aneurysmal SAH may have delayed cerebral ischemia(DCI):thus aneurysmal SAH has both characteristics of hemorrhagic and ischemic strokes(Kanamaru et al.,2019).In spite of enormous efforts to improve outcomes,no conclusive treatment exists thus far,once stroke is completed.

关键词： al. hemorrhagic mortality

Lessons from tenascin-C knockout mice and potential clinical application to subarachnoid hemorrhage

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Neural Regeneration Research 2019年第2期14卷 262-264页

作者： Masato Shiba hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Subarachnoid hemorrhage by a ruptured cerebral aneurysmremains the most devastating cerebrovascular disorderswith high morbidity and mortality (Suzuki et al.,2017), which are mainly caused by early brain injury anddelayed cerebral ischemia. Despite many experimentaland clinical research efforts, the mechanisms of earlybrain injury as well as delayed cerebral ischemia remainunclarified. However, recent works have suggested thattenascin-C, which is a special type of secreted extracellularmatrix proteins, is promising as a novel therapeutictarget against post-subarachnoid hemorrhage early braininjury and delayed cerebral ischemia.

关键词： cerebral clinical ischemia hemorrhage

Implications of periostin in the development of subarachnoid hemorrhage-induced brain injuries

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Neural Regeneration Research 2017年第12期12卷 1982-1984页

作者： Hirofumi Nishikawa hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine Tsu Japan

Target of research in subarachnoid hemorrhage（SAH）：The outcome of aneurysmal SAH remains poor despite advances in the diagnosis and *** many factors related to patients,aneurysms,and institutions,as well as physiol... 详细信息

关键词： Implications of periostin the development subarachnoid hemorrhage-induced brain injuries

Toll-like receptor 4 as a possible therapeutic target for delayed brain injuries after aneurysmal subarachnoid hemorrhage

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Neural Regeneration Research 2017年第2期12卷 193-196页

作者： Takeshi Okada hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine Tsu Japan

Neuroinflammation is a well-recognized consequence of subarachnoid hemorrhage（SAH）, and Toll-like receptor（TLR） 4 may be an important therapeutic target for post-SAH neuroinflammation. Of the TLR family members, TLR4 is expressed in various cell types in the central nervous system, and is unique in that it can signal through both the myeloid differentiation primary-response protein 88-dependent and the toll receptor associated activator of interferon-dependent cascades to coordinate the maximal inflammatory response. TLR4 can be activated by many endogenous ligands having damage-associated molecular patterns including heme and fibrinogen at the rupture of an intracranial aneurysm, and the resultant inflammatory reaction and thereby tissue damages may furthermore activate TLR4. It is widely accepted that the excreted products of TLR4 signaling alter neuronal functions. Previous studies have focused on the pathway through nuclear factor（NF）-κΒ signaling among TLR4 signaling pathways as to the development of early brain injury（EBI） such as neuronal apoptosis and blood-brain barrier disruption, and cerebral vasospasm. However, many findings suggest that both pathways via NF-κΒ and mitogen-activated protein kinases may be involved in EBI and cerebral vasospasm development. To overcome EBI and cerebral vasospasm is important to improve outcomes after SAH, because both EBI and vasopasm are responsible for delayed brain injuries or delayed cerebral ischemia, the most important preventable cause of poor outcomes after SAH. Increasing evidence has shown that TLR4 signaling plays an important role in SAH-induced brain injuries. Better understanding of the roles of TLR4 signaling in SAH will facilitate development of new treatments.

关键词： cerebral aneurysm cerebral vasospasm early brain injury delayed brain injury delayed cerebral ischemia inflammation subarachnoid hemorrhage Toll-like receptor 4

Migratory mode transition of astrocyte progenitors in the cerebral cortex: an intrinsic or extrinsic cell process?

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Neural Regeneration Research 2024年第3期19卷 471-472页

作者： Michio Miyajima hidenori Tabata Kazunori Nakajima Department of Anatomy Keio University School of MedicineShinjuku-kuTokyoJapan Department of Molecular Neurobiology Institute for Developmental ResearchAichi Developmental Disability CenterKasugaiAichiJapan

The cerebral cortex is comprised of properly localized cell types that exert their specific *** the developing brain,cells migrate from the germinal region to their functional locations(Silva et al.,2019;Cossart and Garel,2022).For example,neocortical excitatory neurons are generated in the cerebral ventricular and subventricular zones,move to the developing cortical plate via radial migration,and reside in a radial array of six neuronal layers(Oishi and Nakajima,2018).On the other hand,cortical interneurons are mainly generated in ganglionic eminences,migrate tangentially across the cerebral cortex,and reach their final destinations in the cortex(Lim et al.,2018).The failure of neuronal migration leads to defects in cortical layer *** the mechanisms of neuronal distribution have been well examined,how astrocytes are diffusely distributed in the cortex is still *** are glial cells in the cerebral cortex with several functions,including metabolic support and synapse formation(Abbott et al.,2006;Bosworth and Allen,2017;Allen and Lyons,2018).For example,astrocytes establish synaptic connectivity in the developing brain while they contact numerous synapses and maintain optimal neuronal activity in the adult *** the developing brain,astrocytes are primarily generated from radial glia after the neurogenic *** a certain type of astrocyte called fibrous astrocytes populates the white matter,protoplasmic astrocytes migrate to the cortical plate during neural network formation.

关键词： cerebral migrate Abbott

Tenascin-C in aneurysmal subarachnoid hemorrhage: deleterious or protective?

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Neural Regeneration Research 2016年第2期11卷 230-231页

作者： hidenori Suzuki Fumihiro Kawakita Department of Neurosurgery Mie University Graduate School of Medicine

Subarachnoid hemorrhage（SAH）caused by the rupture of a cerebral aneurysm is a well-known devastating cerebrovascular ***-SAH brain is vulnerable,associated with early brain injury（EBI;Suzuki,2015）.

关键词： SAH Tenascin-C in aneurysmal subarachnoid hemorrhage