Novel neurovascular protective mechanisms of PEDF after subarachnoid hemorrhage
PEDF对蛛网膜下腔出血后神经血管保护的新机制
基本信息
- 批准号:10525250
- 负责人:
- 金额:$ 40.3万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-12-01 至 2026-11-30
- 项目状态:未结题
- 来源:
- 关键词:AcuteAffinityAgeAneurysmal Subarachnoid HemorrhagesApoptosisApoptoticAttenuatedBindingBlood - brain barrier anatomyBrainBrain EdemaBrain InjuriesBrain hemorrhageCardiac MyocytesCell DeathCell SurvivalCerebrovascular SpasmClinicalDataDeteriorationDiseaseEventGene FamilyGlycoproteinsGoalsHomeostasisIn VitroInflammatoryInjuryIntracranial AneurysmIntracranial HypertensionIntranasal AdministrationIschemiaLinkLipaseMaintenanceMalignant - descriptorMediatingMembraneModelingMolecularMorbidity - disease rateNervous System PhysiologyNeurologicNeuronsOsteoblastsOutcomePathologyPathway interactionsPatientsPerforationRattusRecombinantsResearchRodentRodent ModelRoleRuptureSerine Proteinase InhibitorsSignal PathwayStrokeSubarachnoid HemorrhageSurvivorsTherapeuticTissuesTransient Cerebral IschemiaVascular Permeabilitiesblood-brain barrier disruptionblood-brain barrier permeabilizationcell typecerebral ischemic injuryclinical translationgranule cellhuman fetal retinal pigment epithelial cellimprovedimproved outcomeinsightknock-downmacular edemamembermortalityneurobehaviorneuron apoptosisneurovascularnew therapeutic targetnoveloverexpressionpigment epithelium-derived factorpigment epithelium-derived factor receptorprotective effectprotective efficacyprotective pathwayprotein expressionsextherapeutic targettranscription factortreatment strategy
项目摘要
ABSTRACT
Aneurysmal subarachnoid hemorrhage (SAH) is a devastating type of hemorrhagic stroke with 50%
mortality and long-term morbidity in surviving patients.1-4 Recently, the focus of SAH research has been shifted
to early brain injury (EBI) which comprises the acute initial events after SAH, such as elevation of intracranial
pressure (ICP), global ischemia, blood brain barrier (BBB) disruption, brain edema formation, neuronal
apoptosis, activation of inflammatory and cell death pathways that contribute to delayed neurological
deterioration, leading to mortality and morbidity after SAH.5-8
Pigment-epithelium derived factor (PEDF) is a pluripotent glycoprotein expressed in various tissues
including the brain.9,14 PEDF reduced apoptosis in various types of cells including neurons,14,18 osteoblasts24
and cardiomyocytes.22 Likewise, PEDF reduced vascular permeability and macular edema in ophthalmologic
pathologies.37,41 There have been relatively limited studies on the role of PEDF following stroke. PEDF has
been shown to have protective effects on neuronal cell survival in vitro14,18 and attenuated cerebral ischemic
injury in rodent models.19-21 PEDF reduced brain edema following cold-induced injury and transient cerebral
ischemia in rodent models.20,21,42 However, the role of PEDF following SAH has not been explored.
Furthermore, the neurovascular protective mechanisms of PEDF have not been studied. This proposal will
elucidate the neurovascular protective mechanisms of PEDF through anti-apoptotic and BBB
protective pathways in a rodent endovascular perforation SAH model. We will sequentially determine the
role of endogenous PEDF and then evaluate the therapeutic benefits of intranasal administration of
recombinant PEDF against early brain injury after SAH, specifically neuronal apoptosis and BBB disruption will
be evaluated. Additionally, we will elucidate the downstream signaling pathways of PEDF receptor (PEDF-R)
that contribute to anti-apoptotic and BBB protective mechanisms of PEDF. We propose that PEDF will activate
PEDF-R/NPD1/Erk1/2-cRel pathway that reduces neuronal apoptosis with intranasal recombinant PEDF
administration. Also, PEDF activation of the PEDF-R/Nrf2/HO-1 pathway will contribute to BBB stabilization
after SAH. We will knockdown PEDF receptor and inhibit the pathways to elucidate the mechanism of PEDF-R
signaling pathway mediated protection.
Overall, this proposal will provide novel insights into neurovascular protective mechanisms of PEDF.
Additionally, this proposal will establish the protective efficacy of intranasal administration of PEDF as a
potential therapeutic target against early brain injury after SAH.
抽象的
动脉瘤性蛛网膜下腔出血(SAH)是一种毁灭性的出血性中风,50%
幸存患者的死亡率和长期发病率。最近,SAH研究的重点已转移
早期脑损伤(EBI)包括SAH后急性初始事件,例如颅内升高
压力(ICP),全球性缺血,血脑屏障(BBB)破坏,脑水肿形成,神经元
导致神经系统延迟的炎症和细胞死亡途径的凋亡,激活
恶化,导致SAH.5-8之后导致死亡率和发病率
颜料 - 上皮衍生因子(PEDF)是一种在各种组织中表达的多能糖蛋白
包括大脑在内。9,14PEDF降低了包括神经元在内的各种细胞的凋亡,14,18个成骨细胞24
22同样,PEDF降低了眼科中的血管渗透性和黄斑水肿
病理学。37,41关于中风后PEDF作用的研究相对有限。佩夫有
它们被证明对体外14,18的神经元细胞存活有保护的作用,并减弱了脑缺血
啮齿动物模型的损伤。19-21PEDF降低了冷诱导损伤和瞬时脑水肿
啮齿动物模型中的缺血。20,21,42然而,尚未探索PEDF后的PEDF作用。
此外,PEDF的神经血管保护机制尚未研究。该提议将
通过抗凋亡和BBB阐明PEDF的神经血管保护机制
啮齿动物血管内穿孔SAH模型中的保护途径。我们将依次确定
内源性PEDF的作用,然后评估鼻内给药的治疗益处
SAH后针对早期脑损伤的重组PEDF,特别是神经元细胞凋亡和BBB破坏
进行评估。此外,我们将阐明PEDF接收器(PEDF-R)的下游信号通路
这有助于PEDF的抗凋亡和BBB保护机制。我们建议PEDF会激活
PEDF-R/NPD1/ERK1/2-CREL途径可通过鼻内重组PEDF降低神经元凋亡
行政。此外,PEDF-R/NRF2/HO-1途径的PEDF激活将有助于BBB稳定
SAH之后。我们会注意到PEDF接收者并抑制阐明PEDF-R机制的途径
信号通路介导的保护。
总体而言,该建议将为PEDF的神经血管保护机制提供新的见解。
此外,该提案将确定PEDF内鼻内给药的保护有效性
SAH后针对早期脑损伤的潜在治疗靶标。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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John H Zhang其他文献
Gas6 Promotes Microglia Eferocytosis and Suppresses Infammation Through Activating Axl/Rac1 Signaling in Subarachnoid Hemorrhage Mice
Gas6 通过激活蛛网膜下腔出血小鼠中的 Axl/Rac1 信号传导促进小胶质细胞胞质增多并抑制炎症
- DOI:
- 发表时间:
- 期刊:
- 影响因子:6.9
- 作者:
Junjia Tang;Yichao Jin;Feng Jia;Tao Lv;Anatol Manaenko;Lin-Feng Zhang;Zeyu Zhang;Xin Qi;Yajun Xue;Bin Zhao;Xiaohua Zhang;John H Zhang;Jianfei Lu;Qin Hu - 通讯作者:
Qin Hu
1. Early inhibition of HIF-1α with small interfering RNA reduces ischemic-reperfused brain injury in rats
1. 用小干扰 RNA 早期抑制 HIF-1α 可减少大鼠缺血再灌注脑损伤
- DOI:
- 发表时间:
- 期刊:
- 影响因子:6.1
- 作者:
Jiliang Lei;Xiaomei Yang;Xiaozhong Shi;John H Zhang;Chunhua Chen;Yunhong Huang;Junhao Yan;Qin Hu;Lin Chen;Changman Zhou;Jingyan Han - 通讯作者:
Jingyan Han
Hypoxia Induces Autophagic Cell Death through Hypoxia-Inducible Factor 1 alpha in Microglia
缺氧通过小胶质细胞缺氧诱导因子 1 α 诱导自噬细胞死亡
- DOI:
- 发表时间:
2014 - 期刊:
- 影响因子:3.7
- 作者:
Tian-zhi Zhao;Yong-jie Zou;John H Zhang;Hua Feng - 通讯作者:
Hua Feng
John H Zhang的其他文献
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{{ truncateString('John H Zhang', 18)}}的其他基金
The protective function of blood-borne monocytes/macrophages after delayed recanalization in a permanent MCAO rodent model
永久性 MCAO 啮齿动物模型延迟再通后血源性单核细胞/巨噬细胞的保护功能
- 批准号:
10806832 - 财政年份:2023
- 资助金额:
$ 40.3万 - 项目类别:
Novel neurovascular protective mechanisms of PEDF after subarachnoid hemorrhage
PEDF对蛛网膜下腔出血后神经血管保护的新机制
- 批准号:
10358153 - 财政年份:2021
- 资助金额:
$ 40.3万 - 项目类别:
ER stress and neonatal hypoxia ischemia encephalopathy
内质网应激与新生儿缺氧缺血性脑病
- 批准号:
10304130 - 财政年份:2017
- 资助金额:
$ 40.3万 - 项目类别:
Cerebrospinal Fluid Dynamics in Posthemorrhagic Hydrocephalus in Neonates
新生儿出血后脑积水的脑脊液动力学
- 批准号:
10213849 - 财政年份:2017
- 资助金额:
$ 40.3万 - 项目类别:
ER stress and neonatal hypoxia ischemia encephalopathy
内质网应激与新生儿缺氧缺血性脑病
- 批准号:
10059275 - 财政年份:2017
- 资助金额:
$ 40.3万 - 项目类别:
Harnessing Endogenous Neuroprotection Following ICH
利用 ICH 后的内源性神经保护
- 批准号:
9113729 - 财政年份:2016
- 资助金额:
$ 40.3万 - 项目类别:
Harnessing Endogenous Neuroprotection Following ICH
利用 ICH 后的内源性神经保护
- 批准号:
9233211 - 财政年份:2016
- 资助金额:
$ 40.3万 - 项目类别:
Crotalus Snake Venom Preconditioning to Prevent Surgical Brain Injury
响尾蛇蛇毒预处理可预防外科脑损伤
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8901321 - 财政年份:2014
- 资助金额:
$ 40.3万 - 项目类别:
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