Molecular imaging technologies for mechanobiology
Molecular imaging technologies for mechanobiology
批准号:
10320359
负责人:
Alexa Lynn Mattheyses
金额:
$32.91万
依托单位:
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:
2019-01-01 至 2022-12-31
关键词:
3-DimensionalAddressAntigensAtomic Force MicroscopyBiochemicalBiochemistryBiologicalBiological ProcessBlood coagulationCell Surface ReceptorsCell divisionCell physiologyCellsCoagulation ProcessDNADevelopmentDiagnosisDiseaseEmbryonic DevelopmentFamilyFibroblastsFluorescenceFluorescence MicroscopyFluorescence PolarizationFluorescence Resonance Energy TransferFocal AdhesionsGoalsHemostatic functionImageImaging technologyImmobilizationIndividualIntercellular JunctionsLifeLinkMagnetismMapsMeasurementMeasuresMechanicsMethodsMicroscopeModelingMolecularMolecular ConformationNanotechnologyNatureNeoplasm MetastasisOpticsOrganismPathway interactionsPlatelet ActivationPlatelet aggregationPolarization MicroscopyReceptor CellResolutionScienceSignal PathwaySignal TransductionSpectrum AnalysisStrokeStructureT-LymphocyteTechniquesTechnologyTestingTimeTractionTraction Force MicroscopyWorkbasebiological systemsbiomechanical testexperiencefluorescence imagingfluorophorefunctional outcomesimprovedinstrumentationmechanical forcemechanotransductionmigrationmillisecondmolecular dynamicsmolecular imagingmolecular mechanicsnanoscalepublic health relevancereceptorsingle moleculestemstem cell differentiationstem cellssymposiumtechnique developmenttemporal measurementtooltransmission processtumor growth
中文摘要
项目总结:
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细胞是高度动态的,它们在周围的环境中相互挤压、相互拉扯、相互作用、相互作用。
个体之间的相互作用涉及到多种力量。这些力量是由特定的细胞受体和分子感受到的。尽管这些力量很小,但仍然存在。
在大小(Pn)方面,这些新的分子生物学力量可能会对细胞和生命的许多方面产生深远的生物影响。
包括干细胞的分化、细胞的分裂、癌症的转移、血液的凝结等。
能够更好地描述物质力量和生化信号之间的相互作用关系,是人类发展的一个关键组成部分。
了解我们生活中的生物系统中的信号通路。目前有两种主要的生物技术被用来研究分子生物学。
机制生物学:以单分子作用力显微镜(SMFS)和牵引作用力显微镜(TFM)为基础。
方法:虽然功能强大,但这些方法也存在几个缺点。
作用力(PN),但它不这样做,一次只有一个分子作用力。相反,TFM提供了一个细胞作用力的空间地图。
但在现代神经网络的规模上,订单的数量比单个细胞受体应用的订单数量要大得多。这是一座桥梁。
在这些方法中,我们发明了一种分子荧光显微镜(MTFM),它使用了一种传统的方法。
荧光显微镜可以通过使用一个经过校准的分子作用力探针来绘制具有PN值分辨率的细胞作用力图。
这项提案的主要目标是彻底改造MTFM的核心能力,允许更多规模的订单和更多的改进。
空间分辨率和时间分辨率以及作用力方向的空间映射模型。
目前,生物医学和信息科学处于边缘地位,因为许多人缺乏新的工具来精确地量化信息,并将机械设备与信息联系起来。
细胞和生物化学。我们的下一个目标是通过开发新的生物成像技术来改变分子和机械生物学的新领域。
技术需要使蜂窝通信部队能够以前所未有的分辨率进行研究。在这些技术中,以技术为中心。
围绕着基于DNA的MTFM电子探针,我们将为他们提供一个广泛适用的电子技术平台来进行进一步调查。
分子运动学是指分子作用力的功能和结果,存在于各种不同的生物力学系统中。
我们将继续解决空间分辨率与空间分辨率之间的差距,以及基于DNA的空间探测器的杠杆作用,以推动超分辨率的发展。
FORCE-INTRAN以空间分辨率为20纳米的动态地震力成像技术为目标,我们将继续探索这一领域。
据一项研究,FRAP和FCS这两种新方法的力量和力量的动态变化是通过利用这两种方法的强大力量来实现的。
分子力量和动力学与美国国家证券交易委员会合作,以节省时间和解决方案。最后,在我们的目标是3,我们将利用荧光。
偏振显微镜可以用来测量分子作用力的三维方向。我们将不会使用成纤维细胞作为焦点。
粘连、血小板活化和凝血、T细胞和抗原识别是为了测试我们的方法并验证我们的方法。
这些目标的实现也将为我们提供一个新的技术工具箱,帮助我们理解分子作用力的概念,并进一步产生新的理论。
这是一个框架,说明在健康和疾病状态下,他们如何迫使组织结构和细胞动力学影响细胞免疫功能。
英文摘要
Project Summary
Cells are highly dynamic, squeezing, pulling, and tugging on their surroundings and on each other. Each
individual interaction involves forces. These forces are felt by specific receptors and molecules. Although small
in magnitude (pN), these molecular forces can have profound biological impacts in many aspects of cellular life
including the fate of differentiating stem cells, cell division, cancer metastasis, and blood clotting. Therefore, the
ability to characterize the interplay between physical forces and biochemical signals is a critical component of
understanding signaling pathways in living systems. There are two main techniques used to study molecular
mechanobiology: single molecule force spectroscopy (SMFS) and traction force microscopy (TFM) based
methods. While powerful, these approaches suffer from several drawbacks. SMFS measures individual receptor
forces (pN), but it does so only one molecule at a time. Conversely TFM provides spatial maps of cellular forces,
but on the nN scale, orders of magnitude larger than the forces applied by individual cell receptors. To bridge
these approaches, we invented molecular tension fluorescence microscopy (MTFM) which uses conventional
fluorescence microscopy to map cellular forces with pN resolution by using a calibrated molecular force probe.
The goal of this proposal is to transform the capabilities of MTFM allowing orders of magnitude improvement in
spatial and temporal resolution as well as the mapping of force orientation. Molecular mechanobiology remains
at the fringes of biomedical sciences because of the lack of tools to precisely quantify and link mechanics to
cellular biochemistry. Our goal is to transform the field of molecular mechanobiology by developing new imaging
technologies to enable the study cellular forces at unprecedented resolution. These technologies, centered
around the DNA-based MTFM probes, will provide a broadly applicable platform of technology to investigate
molecular mechanics, and the functional outcomes of molecular forces, in diverse biological systems. In Aim 1
we will address the spatial resolution gap, and leverage the DNA-based force probes to develop super-resolution
force-PAINT with the goal of dynamic force imaging with 20 nm spatial resolution. In Aim 2 we will probe the
dynamics of forces and force fluctuations by harnessing the power of two approaches, FRAP and FCS, to study
molecular force dynamics with nsec to msec time resolution. Finally, in Aim 3 we will leverage fluorescence
polarization microscopy to measure the 3D orientations of molecular forces. We will use fibroblast focal
adhesions, platelet activation and coagulation, and T cell antigen recognition to test and verify our approach.
Accomplishment of these goals will provide a new toolkit for understanding molecular forces and generating a
framework of how force organization and dynamics influence cellular function in healthy and disease states.
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会议论文
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Nanoscale structure and function of desmosomes
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批准号:9912104
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资助金额:$32.67万
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Visualizing Desmosome Structure and Dynamics by Polarized Fluorescence Microscopy
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依托单位:
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批准号:10362786
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财政年份:1997
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财政年份:--
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负责人:Alexa Lynn Mattheyses
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依托单位:
海外基金