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    • 1. 发明申请
    • Tissue Preservation and Fixation Method
    • 组织保存和固定方法
    • US20130345075A1
    • 2013-12-26
    • US13836995
    • 2013-03-15
    • Virginia A. EspinaLance A. LiottaDavid Geho
    • Virginia A. EspinaLance A. LiottaDavid Geho
    • G01N1/30
    • G01N1/30A01N1/00
    • This invention relates, e.g., to a composition that, at room temperature, when contacted with a sample comprising phosphoproteins, can fix and stabilize cellular phosphoproteins, preserve cellular morphology, and allow the sample to be frozen to generate a cryostat frozen section suitable for molecular analysis. The composition comprises (1) a fixative that stabilizes the proteins in the sample and that has a sufficient water content for a stabilizer and/or a permeability enhancing agent to be soluble therein; (2) a stabilizer, comprising (a) a kinase inhibitor and (b) a phosphatase inhibitor and, optionally, (c) a protease (e.g., proteinase) inhibitor; (3) a permeability enhancing agent; and (4) lactic acid. Methods and kits are described for preserving phosphoproteins, using such a composition. Also described are endogenous surrogate markers for monitoring protein degradation, including the loss of posttranslational modifications (such as phosphorylation), e.g. following removal of a cell or tissue from a subject; and exogenous molecular sentinels (e.g. phosphoproteins attached to magnetic nanoparticles) that allow one to evaluate the processing history of a cellular or tissue population sample.
    • 本发明涉及例如在室温下与包含磷蛋白的样品接触时可以固定和稳定细胞磷酸蛋白的组合物,保留细胞形态,并允许样品冷冻以产生适于分子的低温恒温器冷冻切片 分析。 组合物包含(1)稳定样品中蛋白质并且具有足够的水含量的固定剂,用于稳定剂和/或渗透性增强剂可溶于其中; (2)稳定剂,其包含(a)激酶抑制剂和(b)磷酸酶抑制剂和任选的(c)蛋白酶(例如蛋白酶)抑制剂; (3)渗透增强剂; 和(4)乳酸。 描述了使用这种组合物来保存磷蛋白的方法和试剂盒。 还描述了用于监测蛋白质降解的内源替代标记,包括翻译后修饰(例如磷酸化)的丧失,例如, 从受试者中除去细胞或组织; 和外源性分子前哨蛋白(例如连接到磁性纳米颗粒的磷酸蛋白),其允许评价细胞或组织群体样品的加工历史。
    • 2. 发明申请
    • TISSUE PRESERVATION AND FIXATION METHOD
    • 组织保存和固定方法
    • US20100068690A1
    • 2010-03-18
    • US12447773
    • 2007-10-26
    • Lance A. LiottaEmmanuel F. Petricoin, IIIDavid GehoVirginia A. Espina
    • Lance A. LiottaEmmanuel F. Petricoin, IIIDavid GehoVirginia A. Espina
    • A01N1/02G01N33/48C07K14/00C12M1/00
    • G01N1/30A01N1/00
    • This invention relates, e.g., to a composition that, at room temperature, when contacted with a sample comprising phosphoproteins, can fix and stabilize cellular phosphoproteins, preserve cellular morphology, and allow the sample to be frozen to generate a cryostat frozen section suitable for molecular analysis. The composition comprises (1) a fixative that is effective to fix the phosphoproteins, and that has a sufficient water content to be soluble for a stabilizer and/or a permeability enhancing agent); (2) a stabilizer, comprising (a) a kinase inhibitor and (b) a phosphatase inhibitor and, optionally, (c) a protease (e.g., proteinase) inhibitor; and (3) a permeability enhancing agent (e.g. PEG). Methods are described for preserving phosphoproteins, using such a composition. Also described are endogenous surrogate markers for monitoring protein degradation, including the loss of posttranslational modifications (such as phosphorylation), e.g. the following removal of a cell or tissue from a subject; and exogenous molecular sentinels (e.g. phosphoproteins attached to magnetic nanoparticles) that allow one to evaluate the processing history of a cellular or tissue population sample.
    • 本发明涉及例如在室温下与包含磷蛋白的样品接触时可以固定和稳定细胞磷酸蛋白的组合物,保留细胞形态,并允许样品冷冻以产生适于分子的低温恒温器冷冻切片 分析。 组合物包含(1)固定磷酸蛋白有效的固定剂,并且其具有足够的水含量可溶于稳定剂和/或渗透性增强剂); (2)稳定剂,其包含(a)激酶抑制剂和(b)磷酸酶抑制剂和任选的(c)蛋白酶(例如蛋白酶)抑制剂; 和(3)渗透性增强剂(例如PEG)。 描述了使用这种组合物来保存磷蛋白的方法。 还描述了用于监测蛋白质降解的内源替代标记,包括翻译后修饰(例如磷酸化)的丧失,例如, 以下从受试者中除去细胞或组织; 和外源性分子前哨蛋白(例如连接到磁性纳米颗粒的磷酸蛋白),其允许评价细胞或组织群体样品的加工历史。
    • 3. 发明授权
    • Tissue preservation and fixation method
    • 组织保存和固定方法
    • US08460859B2
    • 2013-06-11
    • US12447773
    • 2007-10-26
    • Virginia A. EspinaLance A. LiottaDavid Geho
    • Virginia A. EspinaLance A. LiottaDavid Geho
    • A01N1/00
    • G01N1/30A01N1/00
    • This invention relates, e.g., to a composition that, at room temperature, when contacted with a sample comprising phosphoproteins, can fix and stabilize cellular phosphoproteins, preserve cellular morphology, and allow the sample to be frozen to generate a cryostat frozen section suitable for molecular analysis. The composition comprises (1) a fixative that is effective to fix the phosphoproteins, and that has a sufficient water content to be soluble for a stabilizer and/or a permeability enhancing agent); (2) a stabilizer, comprising (a) a kinase inhibitor and (b) a phosphatase inhibitor and, optionally, (c) a protease (e.g., proteinase) inhibitor; and (3) a permeability enhancing agent (e.g. PEG). Methods are described for preserving phosphoproteins, using such a composition. Also described are endogenous surrogate markers for monitoring protein degradation, including the loss of posttranslational modifications (such as phosphorylation), e.g. the following removal of a cell or tissue from a subject; and exogenous molecular sentinels (e.g. phosphoproteins attached to magnetic nanoparticles) that allow one to evaluate the processing history of a cellular or tissue population sample.
    • 本发明涉及例如在室温下与包含磷蛋白的样品接触时可以固定和稳定细胞磷酸蛋白的组合物,保留细胞形态,并允许样品冷冻以产生适于分子的低温恒温器冷冻切片 分析。 组合物包含(1)固定磷酸蛋白有效的固定剂,并且其具有足够的水含量可溶于稳定剂和/或渗透性增强剂); (2)稳定剂,其包含(a)激酶抑制剂和(b)磷酸酶抑制剂和任选的(c)蛋白酶(例如蛋白酶)抑制剂; 和(3)渗透性增强剂(例如PEG)。 描述了使用这种组合物来保存磷蛋白的方法。 还描述了用于监测蛋白质降解的内源替代标记,包括翻译后修饰(例如磷酸化)的丧失,例如, 以下从受试者中除去细胞或组织; 和外源性分子前哨蛋白(例如连接到磁性纳米颗粒的磷酸蛋白),其允许评价细胞或组织群体样品的加工历史。
    • 7. 发明申请
    • One-Step Cell and Tissue Preservative for Morphologic and Molecular Analysis
    • 一步细胞和组织防腐剂用于形态和分子分析
    • US20130137094A1
    • 2013-05-30
    • US13575001
    • 2011-01-25
    • Virginia A. EspinaLance A. LiottaClaudius Mueller
    • Virginia A. EspinaLance A. LiottaClaudius Mueller
    • G01N1/30
    • G01N1/30A01N1/00
    • The invention relates to a one-step chemical composition that preserves animal tissue, cells, and biomolecules, such as human tissue, human cells, and biomolecules therein. It improves the fidelity and morphologic structure of cells, organelles, and nuclear chromatin, and maintains and enhances the cellular antigenicity for immunohistochemistry and flow cytometry, while preserving proteins, post-translational modifications of proteins, and nucleic acids. In one embodiment, the composition comprises a) a non-aldehyde precipitating fixative at a concentration below 25% (volume/volume), b) a reversible/cleavable protein cross-linker that targets lipid-associated molecules, and c) a c reversible/cleavable protein cross-linker that targets water soluble molecules. In another embodiment, the composition further includes a kinase inhibitor, a phosphatase inhibitor, and a permeation enhancer. In still another embodiment, the compositions further include lactic acid at a concentration sufficient to maintain cellular nuclear volume at a level equivalent to aldehyde fixation of the same type of cell. In a further embodiment, the composition comprises: a) a precipitating fixative, b) a reversible/cleavable cross-linker, c) a permeation enhancer, d) a kinase inhibitor, e) a phosphatase inhibitor, and f) a carboxylic acid. In a still further embodiment, the invention comprises method for preserving a biological sample by contacting the sample with the composition of the invention under conditions effective for the preservation of the sample.
    • 本发明涉及保留动物组织,细胞和生物分子的一步化学组合物,例如人组织,人细胞和生物分子。 它提高细胞,细胞器和核染色质的保真度和形态结构,并保持和增强免疫组织化学和流式细胞术的细胞抗原性,同时保留蛋白质,蛋白质的翻译后修饰和核酸。 在一个实施方案中,组合物包含a)浓度低于25%(体积/体积)的非醛沉淀固定剂,b)靶向脂质相关分子的可逆/可切割蛋白质交联剂,以及c)可逆可逆/ 可裂解的蛋白质交联剂,其靶向水溶性分子。 在另一个实施方案中,组合物还包含激酶抑制剂,磷酸酶抑制剂和渗透增强剂。 在另一个实施方案中,组合物还包括浓度足以将细胞核体积保持在与相同类型细胞的醛固定相当的水平的乳酸。 在另一个实施方案中,组合物包括:a)沉淀固定剂,b)可逆/可切割交联剂,c)渗透促进剂,d)激酶抑制剂,e)磷酸酶抑制剂,和f)羧酸。 在又一个实施方案中,本发明包括通过在有效保存样品的条件下使样品与本发明的组合物接触来保存生物样品的方法。
    • 9. 发明授权
    • Hydrogel nanoparticle based immunoassay
    • 基于水凝胶纳米颗粒的免疫测定
    • US09012240B2
    • 2015-04-21
    • US13061507
    • 2009-08-26
    • Lance A. LiottaAlessandra LuchiniEmanuel F. PetricoinVirginia Espina
    • Lance A. LiottaAlessandra LuchiniEmanuel F. PetricoinVirginia Espina
    • G01N33/549G01N33/53G01N33/544G01N33/558G01N33/52G01N33/543
    • G01N33/521G01N33/54333G01N33/54346
    • An immunoassay device incorporating porous polymeric capture nanoparticles within either the sample collection vessel or pre-impregnated into a porous substratum within fluid flow path of the analytical device is presented. This incorporation of capture particles within the immunoassay device improves sensitivity while removing the requirement for pre-processing of samples prior to loading the immunoassay device. A preferred embodiment is coreshell bait containing capture nanoparticles which perform three functions in one step, in solution: a) molecular size sieving, b) target analyte sequestration and concentration, and c) protection from degradation. The polymeric matrix of the capture particles may be made of co-polymeric materials having a structural monomer and an affinity monomer, the affinity monomer having properties that attract the analyte to the capture particle. This device is useful for point of care diagnostic assays for biomedical applications and as field deployable assays for environmental, pathogen and chemical or biological threat identification.
    • 提供了在分析装置的流体流动路径内将多孔聚合物捕获纳米颗粒结合到样品采集容器中或预浸渍到多孔基质内的免疫测定装置。 这种在免疫测定装置内的捕获颗粒的并入提高了灵敏度,同时在加载免疫测定装置之前消除了样品预处理的要求。 优选的实施方案是含有捕获纳米颗粒的芯壳诱饵,其在一个步骤中在溶液中进行三个功能:a)分子筛分,b)目标分析物螯合和浓缩,以及c)防止降解。 捕获颗粒的聚合物基质可以由具有结构单体和亲和单体的共聚物制成,亲和单体具有将分析物吸引到捕获颗粒的性质。 该设备可用于生物医学应用的护理点诊断分析以及环境,病原体和化学或生物威胁鉴定的现场部署测定。