Membrane properties of the OHC system
Membrane properties of the OHC system
批准号:
9364111
负责人:
JOSEPH R SANTOS-SACCHI
金额:
$64.77万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2017
资助国家:
美国
项目状态:
已结题
起止时间:
2017-06-12 至 2022-05-31
关键词:
AchievementAcousticsAnionsAreaAuditoryAutomobile DrivingBasilar MembraneBehaviorBindingBiophysicsCRISPR/Cas technologyCalibrationCaviaCell membraneCell physiologyCellsCharacteristicsChargeChloride IonChloridesCochleaConsultCouplingCryoelectron MicroscopyDataDevelopmentDistantDropsElectric CapacitanceElectrophysiology (science)ElementsEnsureEnvironmentEquilibriumEventFamily memberFrequenciesFunctional disorderGoalsHair CellsHearingHomologous GeneHumanIn VitroInvestigationIon ChannelIonsKineticsKnock-in MouseLateralLeadMammalsMeasurementMeasuresMechanicsMembraneMembrane PotentialsModelingModificationMolecularMolecular BiologyMolecular ConformationMolecular MotorsMonitorMotorMotor NeuronsMovementMusNational Institute on Deafness and Other Communication DisordersOrganOuter Hair CellsPathologyPhasePhysiologicalPlant RootsPredispositionProcessPropertyProteinsPublishingReportingResearchResolutionRoleSaint Jude Children&aposs Research HospitalSensorySpeechStrategic PlanningStretchingStructureStudy modelsSystemTechniquesTestingTimeViralbasebiophysical analysisbiophysical propertiescell typecohesiondata modelingexperimental studyextracellularinterestnon-invasive monitorrat Pres proteinrelating to nervous systemsensorsingle moleculestable cell linevibrationvoltage
中文摘要
耳蜗由多种细胞类型组成,包括感觉、支持和神经元件。
总之,这些细胞组成了一个功能复杂和有凝聚力的电子单位,
分析我们环境中的声音信息。我们利用体外方法,
包括分离的耳蜗外植体、单细胞和最近稳定的细胞系来阐明耳蜗
细胞功能;该策略是在整合到一个有凝聚力的
了解器官。目前,该项目的首要目标是确定
外毛细胞(OHC)的关键膜成分的生物物理特性,是主要的
在听觉功能的球员,使用电生理学,分子生物学,建模和
高分辨率冷冻电镜尽管自上次会议以来,我们在许多方面取得了重大进展,
更新在2010年,我们现在专注于三个具体的研究课题,从我们最重要的发展
成就。特别是,我们调查的主要领域之一一直是并将是
阴离子对OHC分子马达(普雷斯廷,SLC 26 a5)电-机械活性的影响。这
离子是耳蜗放大的根源(Santos-Sacchi等人,2006年)。2012-2016年NIDCD
《战略计划》明确指出,理解听力负离子控制是一个关键目标。三
目的是1)评估OHC非线性电容的氯依赖性动力学行为,
电运动性,2)表征prestin转染的HEK细胞中的细胞内氯离子运动
和OHC与我们创建的新Prestin融合的YFP氯化物传感器,以及3)确定高
普雷斯廷(SLC 26 a5)及其最接近的哺乳动物家族成员SLC 26 a6的解析结构,
cryo-EM,目的是识别由于氯化物和电压引起的构象变化。我们
假设理解这些分子活动将有助于理解OHC如何
使我们能够很好地听到微环境的影响如何导致
影响数百万人的OHC。
英文摘要
The cochlea is composed of a variety of cell types including sensory, supporting and neural elements.
Taken together, these cells comprise a functionally intricate and cohesive electrical unit that initiates
the analysis of acoustic information within our environment. We capitalize on the in vitro approach,
including isolated cochlea explants, single cell, and more recently stable cell lines to elucidate cochlear
cell function; the strategy is to characterize basic properties prior to integration into a cohesive
understanding of the organ. Currently, the overarching aim of this project is focused on determining the
biophysical properties of key membrane components of the outer hair cell (OHC), one of the major
players in auditory function, using a balance of electrophysiology, molecular biology, modelling and
high resolution cryo-EM. Though we have made significant progress on many fronts since our last
renewal in 2010, we now focus on three specific research topics that evolve from our most significant
accomplishments. In particular, one of the main areas of our investigations has been and will be the
influence of anions on the OHC molecular motor’s (prestin, SLC26a5) electro-mechanical activity. This
ion is at the root of cochlear amplification (Santos-Sacchi et al., 2006). Indeed, the NIDCD’s 2012-2016
Strategic Plan specifically identifies understanding anion control of hearing as a key goal. The three
aims are 1) to evaluate the chloride-dependent kinetic behavior of OHC nonlinear capacitance and
electromotility, 2) to characterize intracellular chloride movements in the prestin-transfected HEK cell
and OHC with a new prestin-fused YFP chloride sensor we created, and 3) to determine the high
resolution structure of prestin (SLC26a5) and its closest mammalian family member SLC26a6 using
cryo-EM, with the goal of identifying conformational changes due to chloride and voltage. We
hypothesize that understanding these molecular activities will aid in understanding how the OHC
enables us to hear so well and in turn how micro-environmental influences may lead to pathologies of
the OHC that afflict millions.
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Membrane properties of the OHC system
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批准号:10408895
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项目类别:
-
资助金额:$16.71万
-
财政年份:2017
-
负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Membrane properties of the OHC system
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批准号:10163155
-
项目类别:
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资助金额:$64.97万
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财政年份:2017
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
Structural correlates of prestin activity.
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批准号:7333293
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项目类别:
-
资助金额:$34.66万
-
财政年份:2007
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Structural correlates of prestin activity.
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批准号:7546556
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项目类别:
-
资助金额:$34.71万
-
财政年份:2007
-
负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Structural correlates of prestin activity.
-
批准号:7213152
-
项目类别:
-
资助金额:$35.06万
-
财政年份:2007
-
负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Membrane properties of cells comprising the OHC system
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批准号:7157225
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项目类别:
-
资助金额:$4.51万
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财政年份:2005
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
IN VIVO ANALYSIS OF OUTER HAIR CELL MOTILITY
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批准号:2127082
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项目类别:
-
资助金额:$13.12万
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财政年份:1993
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
IN VIVO ANALYSIS OF OUTER HAIR CELL MOTILITY
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批准号:2127081
-
项目类别:
-
资助金额:$13.05万
-
财政年份:1993
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
IN VIVO ANALYSIS OF OUTER HAIR CELL MOTILITY
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批准号:3218536
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项目类别:
-
资助金额:$13.28万
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财政年份:1993
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
CELL COUPLING IN THE INNER EAR
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批准号:3072031
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项目类别:
-
资助金额:$5.33万
-
财政年份:1985
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
CELL COUPLING IN THE INNER EAR
-
批准号:3074833
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项目类别:
-
资助金额:$5.27万
-
财政年份:1985
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
CELL COUPLING IN THE INNER EAR
-
批准号:3074831
-
项目类别:
-
资助金额:$5.4万
-
财政年份:1985
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
CELL COUPLING IN THE INNER EAR
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批准号:3074832
-
项目类别:
-
资助金额:$5.32万
-
财政年份:1985
-
负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
CELL COUPLING IN THE INNER EAR
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批准号:3074830
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项目类别:
-
资助金额:$5.44万
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财政年份:1985
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
MEMBRANES PROPERTIES OF CELLS COMPRISING THE OHC SYSTEM
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批准号:3216385
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项目类别:
-
资助金额:$15.52万
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财政年份:1984
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Membrane properties of cells comprising the OHC system
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批准号:7074896
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项目类别:
-
资助金额:$2.2万
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财政年份:1984
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
Membrane properties of cells comprising the OHC system
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批准号:7385129
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项目类别:
-
资助金额:$46.06万
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财政年份:1984
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Membrane properties of cells comprising the OHC system
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批准号:8248686
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项目类别:
-
资助金额:$42.18万
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财政年份:1984
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负责人:JOSEPH R SANTOS-SACCHI
-
依托单位:
Membrane properties of cells comprising the OHC system
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批准号:8643196
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项目类别:
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资助金额:$42.18万
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财政年份:1984
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负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
CELL-TO-CELL COMMUNICATION IN THE ORGAN OF CORTI
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批准号:3216387
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项目类别:
-
资助金额:$5.35万
-
财政年份:1984
-
负责人:JOSEPH R SANTOS-SACCHI
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依托单位:
海外基金