Targeting Atr to promote regeneration and functional recovery after neural injury
Targeting Atr to promote regeneration and functional recovery after neural injury
批准号:
10260386
负责人:
Yuanquan Song
金额:
$37.63万
依托单位国家:
美国
项目类别:
财政年份:
2018
资助国家:
美国
项目状态:
已结题
起止时间:
2018-07-15 至 2023-06-30
关键词:
ATR geneAfferent NeuronsAxonBehaviorBehavioral AssayCHEK1 geneCell CycleCell physiologyCellular StressChromatinClinical TrialsCuesDNA DamageDNA Single Strand BreakDNA damage checkpointDataDrosophila genusExcisionFailureGeneticGenetic ScreeningGoalsHomologous GeneImageImpairmentIn VitroInjuryIon ChannelLeadLinkLocationMechanical StressMechanicsMechanoreceptorsMediatingModelingMolecularMultiple SclerosisNatural regenerationNerve DegenerationNerve RegenerationNeuraxisNeurodegenerative DisordersNeurologicNeurologic DysfunctionsNeuronal InjuryNeuronsOperative Surgical ProceduresParalysedPathologicPathway interactionsPatientsPatternPeripheralPharmaceutical PreparationsPharmacologyPhenotypePiezo ion channelsPopulationPropertyProtein-Serine-Threonine KinasesProteinsPublic HealthRecoveryRecovery of FunctionRefractoryRegenerative capacityRegenerative pathwayRegenerative researchRoleSignal PathwaySignal TransductionSpinal Cord LesionsSpinal GangliaSpinal cord injuryStimulusSystemTestingTherapeuticTouch sensationTranslatingTraumaWorkanti-canceraxon injuryaxon regenerationbasecancer therapycell typecentral nervous system injurycombinatorialdesigndisabilitydruggable targeteffective therapyendoplasmic reticulum stressextracellularflygain of functionimprovedinhibitor/antagonistinsightknock-downloss of functionmechanical forcemolecular targeted therapiesmutantnerve injurynervous system disorderneurotransmissionnew therapeutic targetnociceptive responsenoveloverexpressionregenerativerelating to nervous systemrepairedresponsesciatic nerveyoung adult
中文摘要
受损轴突再生和重建功能回路的失败是导致神经系统损伤的主要原因。
中枢神经系统(CNS)损伤后的永久性残疾,并且也是导致神经退行性疾病中所见的不可逆神经功能障碍的主要因素。约占美国的1.9%。
在瘫痪人口中,约有1,275,000人因脊髓损伤(SCI)而瘫痪。 SCIS
经常导致至少一些无法治愈的损害,即使有最好的治疗和患者
完全性损伤几乎不能恢复失去的功能。 在病理情况下,如多发性硬化症,
第二种最常见的神经系统疾病,导致年轻人残疾,受损的轴突无法
再生导致神经系统异常。尽管在过去几十年中做出了大量努力,
导致了细胞外因子的发现,阻碍,和内在的途径,在成熟的神经元,减少
轴突的再生能力,有效的治疗方法还没有出现,因为简单地去除
这些抑制性信号赋予有限的再生,我们对神经元内在再生的理解
这表明,必须建立更多的监管机制。 这
突出了迫切需要确定新的分子靶点的治疗。
为了寻找中枢神经系统轴突再生所必需的新因子,我们利用果蝇感觉神经系统,
神经元损伤模型,在表型和分子水平上类似于哺乳动物损伤,
基于遗传筛选,并确定了压电Atr(共济失调毛细血管扩张和Rad3相关)途径作为抑制剂
轴突再生该建议旨在确定压电陶瓷的细胞和分子机制
Atr在果蝇中的功能,并阐明哺乳动物Atr在外周或脊髓损伤后的作用。Atr是
是DNA损伤反应的重要组成部分,也对机械力作出反应。 该途径
从来没有涉及轴突再生,因此我们的研究将提供令人兴奋的见解的潜力
轴突损伤,DNA损伤反应,机械感觉和再生之间的联系,并将开辟新的
研究再生和脊髓损伤的途径。 利用苍蝇遗传学的力量来识别新的因素和哺乳动物损伤模型,这一策略提供了一个独特的机会,以获得见解
再生调节剂的全部功能,这可能会推动新的治疗方法,以促进患者的康复
神经损伤或神经退行性疾病。
英文摘要
Failure of damaged axons to regenerate and reestablish functional circuitry is the primary cause that results in
permanent disabilities after central nervous system (CNS) injury, and is also a major factor contributing to the non-reversible neurologic dysfunction seen in neurodegenerative diseases. Of approximately 1.9% of the U.S.
population with paralysis, some 1,275,000 are paralyzed as the result of a spinal cord injury (SCI). SCIs
frequently result in at least some incurable impairment even with the best possible treatment and patients with
complete injuries recover very little lost function. Under pathological situations such as multiple sclerosis, the
second most common neurological disorder leading to disability in young adults, failure of damaged axons to
regenerate contributes to neurologic abnormalities. Despite ample efforts in the past few decades, which have
led to the discoveries of extracellular factors that impede, and intrinsic pathways in mature neurons that diminish
the regenerative capacity of axons, effective therapies have not emerged given the fact that simply removing
those inhibitory cues confers limited regrowth and that our understanding of neurons’ intrinsic regenerative
properties still remains incomplete, indicating that additional regulatory machinery must be in place. This
highlights the urgent need to identify novel molecular targets for therapy.
With the goal to find novel factors essential for CNS axon regeneration, we have utilized a Drosophila sensory
neuron injury model that resembles mammalian injury at the phenotypical and molecular level in a candidate-
based genetic screen, and identified the Piezo-Atr (Ataxia telangiectasia and Rad3 related) pathway as inhibitors
for axon regeneration. This proposal aims to determine the cellular and molecular mechanisms underlying Piezo-
Atr’s function in flies and to elucidate the role of the mammalian Atr after peripheral or spinal cord injury. Atr is
an essential component of the DNA damage response and also responds to mechanical force. This pathway
has never been implicated in axon regeneration, and our study will thus provide exciting insights into the potential
links among axon injury, DNA damage response, mechanosensation and regeneration, and will open new
avenues of research for regeneration and spinal cord injury. Taking advantage of the power of fly genetics to identify novel factors and the mammalian injury model, this strategy offers a unique opportunity to gain insights
into the repertoire of regeneration regulators, which may drive novel treatments to promote recovery in patients
with neural injury or neurodegenerative diseases.
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会议论文
Glial metabolic status regulates axon regeneration in the central nervous system
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批准号:10656678
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项目类别:
-
资助金额:$62.59万
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财政年份:2023
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负责人:Yuanquan Song
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依托单位:
Targeting Atr to promote regeneration and functional recovery after neural injury
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批准号:10450101
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项目类别:
-
资助金额:$37.63万
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财政年份:2018
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负责人:Yuanquan Song
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依托单位:
Mechanistic studies of novel factors regulating axon regeneration in the PNS/CNS
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批准号:8753538
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项目类别:
-
资助金额:$9.48万
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财政年份:2014
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负责人:Yuanquan Song
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依托单位:
海外基金