Minocycline plus N-acetylcysteine improves brain structure and function after experimental brain injury with clinically useful time windows
Minocycline plus N-acetylcysteine improves brain structure and function after experimental brain injury with clinically useful time windows
批准号:
10338116
负责人:
Peter J Bergold
金额:
$56.27万
依托单位国家:
美国
项目类别:
财政年份:
2019
资助国家:
美国
项目状态:
已结题
起止时间:
2019-02-01 至 2024-01-31
关键词:
AcetylcysteineActive LearningBilateralBiological AssayBrainBrain InjuriesCell physiologyChronicChronic PhaseClinicalClinical TrialsClosed head injuriesCognitionContralateralCraniocerebral TraumaDataDendritesDendritic SpinesDoseDrug CombinationsDrug TargetingElectron MicroscopyElementsFDA approvedFemaleGolgi ApparatusHippocampus (Brain)HistologicHourImpairmentIndividualInjuryIpsilateralLearningLong-Term PotentiationLoxP-flanked alleleMemoryMinocyclineMitochondriaMorphologyMusMutant Strains MiceNeuronsOxidative StressPatientsPersonsPharmaceutical PreparationsPhaseProtein BiosynthesisProtein Kinase MPublishingRoleSafetySalineSiteSliceStainsStructureSymptomsSynapsesSynaptic plasticitySynaptophysinTestingTherapeuticTimeTraumatic Brain InjuryVertebral columnbehavioral outcomeclinical candidateclinically relevantdensitydrug efficacyfunctional restorationgray matterimprovedinjuredinjury and repairlong term memorymalemild traumatic brain injurymutantneuroinflammationneuron lossnovelpreventprotein expressionprotein kinase inhibitorrepairedrestorationtreatment duration
中文摘要
治疗时间和窗口期是任何有效药物治疗急性脑外伤的关键因素。只有中度到重度脑外伤的患者才能接受治疗。
在受伤后几个小时内接受治疗;;表示,那些患有轻度颅脑损伤的患者可能会推迟几天的治疗,直到他们的新症状不再缓解。
很少有新的药物被开发出来,而且治疗时间很长,没有足够的药物来治疗脑外伤,这在一定程度上是因为它很少。
目前尚不清楚哪些细胞免疫功能可以通过几个小时至几天的损伤后恢复(PI)用药进行靶向治疗。
米诺环素(Mino)和N-乙酰半胱氨酸(NAC)的联合应用在第一次给药12小时后仍保持高药效。
(MN12)。发表的研究和初步的研究数据表明,MN12可以防止神经元的丢失,并能保护未来的树突。
海马区同侧连接到大脑的影响部位,它允许学习一个主动的回避任务的地方,这是它需要的。
海马区;;恢复晚期和长期脑电增强指数(LTP)均可恢复海马区。初步数据显示,这一点是可能的。
第一次以72H/PI(MN72)的价格注射第一剂Mino+NAC的效力远低于MN12,但仍未恢复对美国巴恩斯的收购。
迷宫是一项新的任务,它只需要一个海马体,然后在大脑海马体和对侧大脑中进行LTP检查,就可以减少影响。
此外,MN72还增加了对侧海马区的蛋白质和合成能力。这项新的提案旨在研究MN12是否存在。
而MN72则针对树突、突触、棘突、突触和突触的蛋白质合成进行靶向治疗。
小鼠。这项拟议的研究还将审查MN12和MN72是否靶向蛋白酪氨酸激酶M和Zeta(PKMz Zeta),这是最重要的。
对于晚期LTP学习和海马区依赖的学习任务的记忆保持能力来说,这是必不可少的。研究小组还将研究是否存在Mino。
此外,当给药时间晚于72H-PI时,NAC仍然是有效的药物。这些数据将支持3个特定的药物目标(SA),这将是一种测试。
中央银行假说认为:在临床上相关的治疗时间和窗口限制下,米诺+NAC的剂量是有限的。
灰色对受伤很重要,它可以改善人的认知能力和记忆力。SA1:在哪里确实需要第一剂Mino和NAC。
在大约12点或72小时后,MN12修复了树突、棘突和突触?根据SA1的最新工作假说是:MN12。
双边的行为是为了防止损伤和诱导修复,而MN72的行为只作用于对侧的海马体。
在MN12或MN72之后,还将检测神经炎症、氧化应激和线粒体的形态变化。
治疗:MN12和MN72靶向PKMz的表达,以恢复突触的可塑性。
海马区依赖的任务的获得性研究?NSA2将研究MN12或MN12所影响的PKMz基因表达的主要作用。
MN72正在使用NtSA,这是一种新的药物,也是PKMz的一种特异酶抑制剂,在有条件的PkMz突变小鼠中使用。
为了表明MN12%或MN72%的目标是PKMz,需要恢复后期的LTP和长期的记忆。
NAC在颅脑损伤的亚急性期(14D)或慢性期(45D)早期限制脑损伤,并恢复其功能。
如果这些药物在晚些时候给药时保留了药效,那么Mino+NAC的药效将会大大提高。
TBI的各个阶段。这些研究具有很高的潜在意义,因为它们将表明,这是一种新的联合疗法--FDA--
临床上有用的已批准的新药可以恢复认知能力和记忆,而这两项才是核心缺陷。
由TBI制作。这些研究具有潜在的高影响,因为几乎没有有效的治疗药物使人死亡。
有了脑外伤,寻求新治疗的可能性就更小了。MN12和MN72是需要治疗脑外伤的临床试验的有吸引力的候选者。
英文摘要
Therapeutic time window is a key element of any drug to treat TBI. Patients with moderate to severe TBI can be
treated hours after injury;; those with mild TBI may delay treatment for days until their symptoms do not abate.
Few drugs have been developed with therapeutic time windows long enough to treat TBI, in part, because little
is known about which cellular functions can be targeted by drugs dosed hours to days post-injury (PI). The
combination of minocycline (MINO) plus N-acetylcysteine (NAC) retains high potency when first dosed 12h PI
(MN12). Published and preliminary data suggest that MN12 prevents neuronal loss and protects dendrites in the
hippocampal ipsilateral to the impact site, allows learning of an active place avoidance task that requires both
hippocampi;; and restores late long-term potentiation (LTP) to both hippocampi. Preliminary data suggests that
a first dose of MINO plus NAC at 72H PI (MN72) is less potent than MN12 yet restores acquisition of Barnes
maze, a task that requires only one hippocampus, and late LTP in the hippocampus contralateral to the impact
site. MN72 also increases protein synthesis in the contralateral hippocampus. This proposal examines if MN12
and MN72 target dendrites, synapses, spines, and synaptic protein synthesis after closed head injury (CHI) in
mice. Proposed studies will examine whether MN12 and MN72 target protein kinase M zeta (PKMz), which is
essential for late LTP and retention of hippocampal-dependent tasks. Studies will also examine whether MINO
plus NAC remains potent when dosed later than 72H PI. These data support 3 specific aims (SA) that test a
central hypothesis that: Dosing of MINO plus NAC at clinically relevant therapeutic time windows limits
gray matter injury and improves cognition and memory. SA1: Where does a first dose of MINO plus NAC
at 12 or 72h after CHI repair dendrites, spines and synapses? The working hypothesis of SA1 is that MN12
acts bilaterally to prevent injury and induce repair while MN72 acts only on the contralateral hippocampus. SA1
will also assay neuroinflammation, oxidative stress and mitochondrial morphology after MN12 or MN72
treatment. SA2: Does MN12 and MN72 target PKMz expression to restore synaptic plasticity and
acquisition of hippocampal-dependent tasks? SA2 will examine a role for PKMz expression by MN12 or
MN72 using NTSA, a novel and specific inhibitor of PKMz, or in conditional PKMz mutant mice. SA2 is predicted
to show that MN12 or MN72 target PKMz to restore late LTP and long-term memory. SA 3: Does MINO plus
NAC limits brain injury and restore function in the subacute (14D PI) or chronic (45D PI) stages of TBI?
The utility of MINO plus NAC would be greatly increased if the drugs retained potency when dosed in later
phases of TBI. These studies have high potential significance since they show that a combination of FDA-
approved drugs with clinically useful windows can restore cognition and memory, which are central deficits
produced by TBI. These studies have potentially high impact since the absence of effective drugs make people
with TBI less likely to seek treatment. MN12 and MN72 are attractive candidates for clinical trials to treat TBI.
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会议论文
Minocycline Plus N-Acetylcysteine Improves Brain Structure and Function After Experimental Brain Injury with Clinically Useful Time Windows
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批准号:10555285
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项目类别:
-
资助金额:$41.46万
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财政年份:2019
-
负责人:Peter J Bergold
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依托单位:
Remyelination after traumatic brain injury
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批准号:8623152
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项目类别:
-
资助金额:$27.72万
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财政年份:2013
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负责人:Peter J Bergold
-
依托单位:
Remyelination after traumatic brain injury
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批准号:8506772
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项目类别:
-
资助金额:$27.97万
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财政年份:2013
-
负责人:Peter J Bergold
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依托单位:
海外基金