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:10358153
- 负责人:
- 金额:$ 40.03万
- 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 SpasmClinicalDataDeteriorationDiseaseEventGenesGlycoproteinsGoalsHomeostasisIn VitroInflammatoryInjuryIntracranial AneurysmIntracranial HypertensionIntranasal AdministrationIschemiaLinkLipaseMaintenanceMalignant - descriptorMediatingMembraneModelingMolecularMorbidity - disease rateNervous System PhysiologyNeurologicNeuronsOphthalmologyOutcomePathologyPathway 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 efficacyprotein 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.
摘要
动脉瘤性蛛网膜下腔出血(SAH)是一种破坏性的出血性卒中,
存活患者的死亡率和长期发病率。1 - 2004最近,SAH研究的重点已经转移
早期脑损伤(EBI)包括SAH后的急性初始事件,如颅内压升高,
颅内压(ICP),全脑缺血,血脑屏障(BBB)破坏,脑水肿形成,神经元
细胞凋亡,炎症和细胞死亡途径的激活,导致延迟的神经
恶化,导致SAH后的死亡率和发病率。
色素上皮衍生因子(PEDF)是一种多能性糖蛋白,
包括大脑。9,14 PEDF减少了各种类型细胞的凋亡,包括神经元,14,18成骨细胞24
22同样,PEDF减少了眼科手术中的血管通透性和黄斑水肿。
关于PEDF在卒中后的作用的研究相对有限。
已显示对体外神经元细胞存活具有保护作用14,18,并减弱脑缺血
PEDF减少了寒冷诱导的损伤后的脑水肿和短暂的脑水肿。
然而,PEDF在SAH后的作用尚未被探索。
此外,PEDF的神经血管保护机制尚未研究。该提案将
通过抗凋亡和血脑屏障的作用,阐明PEDF的神经血管保护机制
在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效果,
重组PEDF抗SAH后早期脑损伤,特别是神经元凋亡和BBB破坏,
此外,我们还将阐明PEDF受体(PEDF-miR)的下游信号通路。
提示PEDF具有抗脑细胞凋亡和血脑屏障保护作用,
鼻内重组PEDF减少神经元凋亡的PEDF-miR/NPD 1/Erk 1/2-miR-1通路
此外,PEDF激活PEDF-miR/Nrf 2/HO-miR 1通路将有助于BBB稳定化。
我们将通过敲低PEDF受体,抑制PEDF受体通路,来阐明PEDF受体介导SAH的机制
信号通路介导的保护。
总之,这一建议将提供新的见解PEDF的神经血管保护机制。
此外,该建议将确立鼻内给予PEDF作为一种免疫抑制剂的保护功效。
SAH后早期脑损伤的潜在治疗靶点。
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
The development of hyperbaric oxygen therapy for skin rejuvenation and treatment of photoaging
- DOI:
10.1186/2045-9912-4-7 - 发表时间:
2014-04-01 - 期刊:
- 影响因子:2.900
- 作者:
Bralipisut Asadamongkol;John H Zhang - 通讯作者:
John H Zhang
A new perspective on cerebrospinal fluid dynamics after subarachnoid hemorrhage: From normal physiology to pathophysiological changes
- DOI:
10.1177/0271678x211045748 - 发表时间:
2021 - 期刊:
- 影响因子:
- 作者:
Yuanjian Fang;Lei Huang;Xiaoyu Wang;Xiaoli Si;Cameron Lenahan;Hui Shi;Anwen Shao;Jiping Tang;Sheng Chen;Jianmin Zhang;John H Zhang - 通讯作者:
John H Zhang
Cerebral vasospasm after subarachnoid hemorrhage: the emerging revolution
蛛网膜下腔出血后的脑血管痉挛:新兴的革命
- DOI:
10.1038/ncpneuro0490 - 发表时间:
2007-05-01 - 期刊:
- 影响因子:33.100
- 作者:
R Loch Macdonald;Ryszard M Pluta;John H Zhang - 通讯作者:
John H Zhang
The role of Volatile Anesthetics in Cardioprotection: a systematic review
- DOI:
10.1186/2045-9912-2-22 - 发表时间:
2012-08-28 - 期刊:
- 影响因子:2.900
- 作者:
Nicole R Van Allen;Paul R Krafft;Arthur S Leitzke;Richard L Applegate;Jiping Tang;John H Zhang - 通讯作者:
John H Zhang
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:
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- 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
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:
$ 40.03万 - 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:
10525250 - 财政年份:2021
- 资助金额:
$ 40.03万 - 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
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10213849 - 财政年份:2017
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ER stress and neonatal hypoxia ischemia encephalopathy
内质网应激与新生儿缺氧缺血性脑病
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10059275 - 财政年份:2017
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Harnessing Endogenous Neuroprotection Following ICH
利用 ICH 后的内源性神经保护
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9233211 - 财政年份:2016
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Harnessing Endogenous Neuroprotection Following ICH
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9113729 - 财政年份:2016
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