Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders
饮食调节与年龄相关的记忆障碍中的神经炎症
基本信息
- 批准号:9975668
- 负责人:
- 金额:$ 76.41万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-09-01 至 2023-05-31
- 项目状态:已结题
- 来源:
- 关键词:Active Biological TransportAgeAge-Related Memory DisordersAge-associated memory impairmentAgingAlzheimer&aposs DiseaseAmyotrophic Lateral SclerosisAntioxidantsBindingBloodBlood - brain barrier anatomyBlood PlateletsBlood PressureBrainBrain regionCellsClinicalClinical ResearchClinical TrialsCocoa PowderCognitive agingConsumptionDataDementiaDevelopmentDietDietary InterventionDietary intakeDiffusionElderlyEndothelial CellsEndotheliumEndotoxemiaEpidemicEquipmentFamilyFlavanolFoodFunctional Magnetic Resonance ImagingFunctional disorderGoalsHMGB1 geneHealthHealthcare SystemsHippocampus (Brain)HumanImmuneImpaired cognitionImpairmentIndividualInflammationInflammation MediatorsInflammatoryInnate Immune SystemIntakeInterventionInvestigationLearningLinkMeasurableMeasuresMediatingMediationMediator of activation proteinMemoryMemory impairmentMethodologyMicrogliaModelingNerve DegenerationNeurodegenerative DisordersOperative Surgical ProceduresOralOxidative StressParkinson DiseaseParticipantPathologyPathway interactionsPatientsPeripheralPeripheral NervesPilot ProjectsPlacebosPlantsPlasmaPopulationProductionQuality of lifeRandomized Controlled TrialsRecording of previous eventsReportingResearchRodentRodent ModelRoleSentinelSerologicalSerumSignal PathwaySignal TransductionStructureSynaptic plasticityTLR4 geneTNF geneTestingTraumaValidationVariantVasomotorage groupage relatedbasebeanbrain cellbrain dysfunctioncerebral blood volumecognitive functioncytokinedentate gyrusdietary supplementsepicatechinfunctional statusglymphatic systemgroup interventionhuman old age (65+)imaging approachimprovedimproved functioninginflammatory markerinsulin sensitivitymacrophageneurogenesisneuroinflammationneuronal survivalneuropathologynonhuman primatenutritional supplementationpost interventionpreventprimary outcomeprogramsprospectiveseptic patientsstem cellstherapeutic targetvascular inflammation
项目摘要
Within 25 years, the US population aged 65 and over will double in size to 80 million bringing, with it an
epidemic of aging-related cognitive decline, from normal cognitive aging to neurodegenerative disorders
including Alzheimer’s Disease (AD). These conditions impair quality of life and functional status, impose an
enormous burden on individuals, their families, the healthcare system, and require elucidation of mechanisms
and development of new treatments to prevent or at least slow their progression.
The use of plant-based food and drink for health purposes has a long and well-documented history. Cocoa
beans contain the flavanol epicatechin, an anti-oxidant with beneficial effects on blood pressure, endothelium-
dependent vasomotor function, platelet reactivity, insulin sensitivity, vascular inflammation, and circulating
progenitor cells. Importantly, flavanols have neuroprotective effects, suppressing oxidative stress and
inflammation and promoting neurogenesis, neuronal survival and synaptic plasticity, all of which are relevant to
the pathophysiology of neurodegenerative disorders like AD, amyotrophic lateral sclerosis (ALS), and
Parkinson’s Disease (PD).
Evidence from humans, non-human primates, and rodents points to a role for the hippocampus and its
subregions in aging-related neurodegenerative disorders including AD. We recently reported that dietary
intake of cocoa flavanols increased hippocampal function, measured as fMRI cerebral blood volume (CBV) and
a pilot mediation analysis showed that cocoa flavanols led to a decrease in the sentinel pro-inflammatory
mediator HMGB1, an activator of the innate immune system. In turn, this decrease in HMGB1 was linked to
improved hippocampal function. Recent evidence implicates HMGB1 in cognitive decline and impairment.
HMGB1 binds to Toll-like receptor 4 (TLR4), triggering the production of pro-inflammatory cytokines including
TNFa via NFkB-dependent pathways. In rodent models of endotoxemia and surgical trauma, HMGB1
mediated hippocampal-dependent memory impairment similar to that seen in septic patients, an effect
eliminated by neutralizing HMGB1.
These data mechanistically link HMGB1 to neurodegenerative impairment, suggesting its potential as a
therapeutic target, consistent with evidence that amplified systemic inflammation is associated with a variety of
age-related pathologies including Alzheimer’s Disease. They strongly support our major hypothesis that cocoa
flavanols improve hippocampal function by their effects on neuroinflammation, specifically HMGB1, via a
TLR4-NFkB-TNFa signaling pathway. We propose to test this model in a randomized controlled trial of 146
participants, age 50-69, receiving high or low daily cocoa flavanol for 12 weeks. Such a trial has potential for
significant clinical impact.
在25年内,美国65岁及以上的人口将翻一番,达到8000万,
从正常认知老化到神经退行性疾病,与衰老相关的认知衰退的流行
包括阿尔茨海默病(AD)。这些疾病损害生活质量和功能状态,
给个人、家庭、医疗保健系统带来巨大负担,需要阐明机制
并开发新的治疗方法来预防或至少减缓其进展。
植物性食品和饮料用于健康目的有着悠久的历史和良好的记录。可可
豆类含有黄烷醇表儿茶素,一种对血压,内皮细胞,
依赖性血管功能、血小板反应性、胰岛素敏感性、血管炎症和循环
祖细胞重要的是,黄烷醇具有神经保护作用,抑制氧化应激,
炎症和促进神经发生,神经元存活和突触可塑性,所有这些都与
神经退行性疾病如AD、肌萎缩性侧索硬化症(ALS)和
帕金森病(PD)。
来自人类、非人类灵长类动物和啮齿类动物的证据表明,海马体及其
包括AD在内的衰老相关神经退行性疾病的亚区域。我们最近报道,饮食
可可黄烷醇的摄入增加了海马的功能,以fMRI脑血容量(CBV)测量,
一项初步的调解分析表明,可可黄烷醇导致哨兵促炎因子的减少,
介质HMGB 1,先天免疫系统的激活剂。反过来,HMGB 1的减少与以下因素有关:
改善海马功能。最近的证据表明HMGB 1与认知能力下降和损伤有关。
HMGB 1与Toll样受体4(TLR 4)结合,触发促炎细胞因子的产生,包括
TNFa通过NFkB依赖性途径。在内毒素血症和手术创伤的啮齿动物模型中,HMGB 1
介导的海马依赖性记忆障碍与脓毒症患者相似,
通过中和HMGB 1消除。
这些数据将HMGB 1与神经退行性损伤机制联系起来,表明其作为神经退行性损伤的潜力。
治疗靶点,这与全身性炎症放大与各种炎症相关的证据一致。
与年龄相关的病理学,包括阿尔茨海默病。它们有力地支持了我们的主要假设可可
黄烷醇通过其对神经炎症的作用,特别是HMGB 1,通过
TLR 4-NFkB-TNFa信号通路。我们建议在146名受试者的随机对照试验中测试该模型。
参与者,年龄50-69岁,接受高或低的每日可可黄烷醇12周。这样的试验有可能
重大临床影响。
项目成果
期刊论文数量(0)
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会议论文数量(0)
专利数量(0)
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{{ truncateString('Richard P SLOAN', 18)}}的其他基金
Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders
饮食调节与年龄相关的记忆障碍中的神经炎症
- 批准号:
10457914 - 财政年份:2018
- 资助金额:
$ 76.41万 - 项目类别:
Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders
饮食调节与年龄相关的记忆障碍中的神经炎症
- 批准号:
9933182 - 财政年份:2018
- 资助金额:
$ 76.41万 - 项目类别:
Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders
饮食调节与年龄相关的记忆障碍中的神经炎症
- 批准号:
9766169 - 财政年份:2018
- 资助金额:
$ 76.41万 - 项目类别:
Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders
饮食调节与年龄相关的记忆障碍中的神经炎症
- 批准号:
10187474 - 财政年份:2018
- 资助金额:
$ 76.41万 - 项目类别:
Psychosocial Factors and Aging: Resting/Reflexive Cardiovascular Control
心理社会因素和衰老:静息/反射性心血管控制
- 批准号:
8532602 - 财政年份:2013
- 资助金额:
$ 76.41万 - 项目类别:
Exercise, aging, and cognition: Effect and mechanisms
运动、衰老和认知:效果和机制
- 批准号:
8526315 - 财政年份:2010
- 资助金额:
$ 76.41万 - 项目类别:
Exercise, Age-Related Memory Decline, and Hippocampal Function.
运动、与年龄相关的记忆衰退和海马功能。
- 批准号:
8325547 - 财政年份:2010
- 资助金额:
$ 76.41万 - 项目类别:
Exercise, aging, and cognition: Effect and mechanisms
运动、衰老和认知:效果和机制
- 批准号:
8723714 - 财政年份:2010
- 资助金额:
$ 76.41万 - 项目类别:
Exercise, aging, and cognition: Effect and mechanisms
运动、衰老和认知:效果和机制
- 批准号:
7986691 - 财政年份:2010
- 资助金额:
$ 76.41万 - 项目类别:
Exercise, Age-Related Memory Decline, and Hippocampal Function.
运动、与年龄相关的记忆衰退和海马功能。
- 批准号:
7986086 - 财政年份:2010
- 资助金额:
$ 76.41万 - 项目类别:
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