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    Enzymatic Assays for a Droplet Actuator
    1.
    发明申请
    Enzymatic Assays for a Droplet Actuator 有权
    滴液致动器的酶检测

    公开(公告)号：US20130230875A1

    公开(公告)日：2013-09-05

    申请号：US13862587

    申请日：2013-04-15

    申请人： Vamsee K. Pamula ,  Allen E. Eckhardt ,  Jeremy Rouse ,  Vijay Srinivasan

    发明人： Vamsee K. Pamula ,  Allen E. Eckhardt ,  Jeremy Rouse ,  Vijay Srinivasan

    IPC分类号： G01N21/64

    CPC分类号： G01N21/6486 ,  B01F13/0809 ,  C07H15/04 ,  C12Q1/34 ,  G01N2333/928 ,  G01N2800/042

    摘要： A method is provided for conducting a droplet-based enzymatic assay, e.g., for diagnostic purposes. On a droplet actuator, a droplet comprising an enzyme of interest is provided along with a droplet comprising a substrate which is potentially modified in the presence of the enzyme. Droplet operations are executed to combine the enzyme and substrate droplets on the droplet actuator, thereby yielding an assay droplet on the droplet actuator. Detecting modification of the substrate by the enzyme in the assay droplet occurs on the droplet actuator. Modified substrate preparations for conducting such enzymatic assays are also provided.

    摘要翻译： 提供了用于进行基于液滴的酶测定的方法，例如用于诊断目的。 在液滴致动器上，包含感兴趣的酶的液滴与包含在酶存在下潜在地被修饰的底物的液滴一起提供。 执行液滴操作以将酶和底物液滴组合在液滴致动器上，从而在液滴致动器上产生测定液滴。 在液滴致动器中检测由测定液滴中的酶对底物的修饰。 还提供了用于进行这种酶测定的修饰底物制剂。

    Enzyme Assays for a Droplet Actuator
    3.
    发明申请
    Enzyme Assays for a Droplet Actuator 有权
    滴液致动器的酶分析

    公开(公告)号：US20100041086A1

    公开(公告)日：2010-02-18

    申请号：US12497677

    申请日：2009-07-05

    申请人： Vamsee K. Pamula ,  Allen E. Eckhardt ,  Jeremy Rouse ,  Vijay Srinivasan

    发明人： Vamsee K. Pamula ,  Allen E. Eckhardt ,  Jeremy Rouse ,  Vijay Srinivasan

    IPC分类号： C12Q1/34

    CPC分类号： C12Q1/34 ,  B01F13/0071 ,  B01L3/502784 ,  B01L7/54 ,  B01L2300/0654 ,  B01L2300/0829 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  G01N2021/035 ,  G01N2333/924 ,  G01N2800/042

    摘要： The invention relates to a microfluidic platform and methods of using the platform for conducting enzyme assays using a droplet actuator. The enzyme assays of the invention are useful for, among other things, identifying and/or characterizing disorders resulting from conditions in which enzymes are defective or are produced in inappropriate amounts. Enzyme assays of the invention may, for example, be used to detect altered activity of a particular enzyme in a sample, which may serve as an indicator of a particular disease. Altered activity may, for example, be caused by conditions which result in the increased or reduced production of a certain enzyme or its substrate and/or conditions which result in defective enzymes and/or substrates exhibiting increased or decreased effectiveness relative to corresponding normal enzymes and/or substrates.

    摘要翻译： 本发明涉及一种微流体平台和使用该平台用于使用液滴致动器进行酶测定的方法。 本发明的酶测定法尤其可用于识别和/或表征由酶缺陷或以不适当量产生的病症引起的疾病。 本发明的酶测定可以例如用于检测样品中特定酶的改变的活性，其可以用作特定疾病的指标。 改变的活性可以例如由导致某些酶或其底物的产生增加或减少的条件引起，和/或导致有缺陷的酶和/或底物相对于相应的正常酶显示出增加或降低的有效性的条件，和 /或底物。

    Bead Sorting on a Droplet Actuator
    7.
    发明申请
    Bead Sorting on a Droplet Actuator 审中-公开
    珠子在滴液致动器上排序

    公开(公告)号：US20100048410A1

    公开(公告)日：2010-02-25

    申请号：US12531826

    申请日：2008-03-24

    申请人： Alexander D. Shenderov ,  Vamsee K. Pamula ,  Allen E. Eckhardt

    发明人： Alexander D. Shenderov ,  Vamsee K. Pamula ,  Allen E. Eckhardt

    IPC分类号： C40B30/00 ,  C40B50/08

    CPC分类号： G01N33/54366 ,  G01N33/54326 ,  G01N35/0098

    摘要： A method of sorting beads on a droplet actuator. The method may, for example, include the following steps: (a) providing a droplet actuator comprising a substrate comprising electrodes arranged for conducting droplet operations on a substrate surface; (b) providing an assay droplet on the substrate surface, the droplet comprising two or more target-capture bead populations comprising target-capture beads comprising: (i) a capture probe bound to a target substance; and (ii) a unique bar binding element which binds to a corresponding binder; (c) using droplet operations to combine the assay droplet with a bead-capture droplet comprising one or more bead-capture beads having affinity for the binding element; (d) immobilizing the one or more bead-capture beads while conducting droplet operations to separate the bead-capture beads from unbound target-capture beads; (e) resuspending the one or more bead-capture beads in a droplet, thereby providing a droplet comprising a substantially pure substance-capture bead population; and (f) using droplet operations to conduct one or more protocol steps for an assay protocol.

    摘要翻译： 一种在液滴致动器上分选珠粒的方法。 该方法可以例如包括以下步骤：（a）提供液滴致动器，其包括基板，该基板包括布置成用于在基板表面上进行液滴操作的电极; （b）在基底表面上提供测定液滴，所述液滴包含两个或更多个目标捕获珠群，包含目标捕获珠，其包含：（i）与靶物质结合的捕获探针; 和（ii）结合相应的粘合剂的独特的棒结合元件; （c）使用液滴操作将测定液滴与包含对结合元件具有亲和性的一个或多个珠粒捕获珠粒的珠粒捕获液滴组合; （d）固定所述一个或多个珠粒捕获珠粒，同时进行液滴操作以将珠粒捕获珠粒与未结合的靶捕获珠粒分离; （e）将一个或多个珠粒捕获珠重新悬浮在液滴中，由此提供包含基本上纯的物质捕获珠粒的液滴; 和（f）使用液滴操作为测定方案进行一个或多个方案步骤。

    Method of Detecting an Analyte
    8.
    发明申请
    Method of Detecting an Analyte 有权
    检测分析物的方法

    公开(公告)号：US20090311713A1

    公开(公告)日：2009-12-17

    申请号：US12546253

    申请日：2009-08-24

    申请人： Michael G. Pollack ,  Zhishan Hua ,  Allen E. Eckhardt ,  Prasanna Thwar ,  Vijay Srinivasan ,  Vamsee K. Pamula

    发明人： Michael G. Pollack ,  Zhishan Hua ,  Allen E. Eckhardt ,  Prasanna Thwar ,  Vijay Srinivasan ,  Vamsee K. Pamula

    IPC分类号： C12Q1/68

    CPC分类号： B01L3/502792 ,  B01L3/502753 ,  B01L3/502761 ,  B01L7/525 ,  B01L2200/10 ,  B01L2300/0816 ,  B01L2300/089 ,  B01L2400/0427 ,  B01L2400/043 ,  C12Q1/6848 ,  C12Q2565/629

    摘要： The invention relates to certain novel approaches to reducing or eliminating the movement of contaminants from one droplet to another on a droplet actuator via liquid filler fluid. In one application, a method of detecting an analyte is provided and includes providing in a detection window a droplet including a signal-producing substance indicative of the presence and/or quantity of an analyte and one or more magnetically responsive beads which may interfere with signal produced by the signal producing substance. The method further includes using a magnetic field for magnetically removing the magnetically responsive beads from the detection window and/or magnetically restricting the magnetically responsive beads from entering the detection window while transporting and/or retaining the droplet in the detection window. The method additionally includes detecting a signal produced by the signal-producing substance.

    摘要翻译： 本发明涉及在液滴致动器上通过液体填充液减少或消除污染物从一个液滴到另一个液滴的移动的某些新颖方法。 在一个应用中，提供检测分析物的方法，并且包括在检测窗口中提供包含指示分析物的存在和/或量的信号产生物质的液滴和一个或多个可能干扰信号的磁响应珠子 由信号产生物质产生。 该方法还包括使用磁场来从检测窗口磁性地去除磁响应珠子和/或磁力限制磁响应珠子进入检测窗口，同时在检测窗口中传送和/或保持液滴。 该方法还包括检测由信号产生物质产生的信号。