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    • 1. 发明授权
    • Protease inhibitor assay
    • 蛋白酶抑制剂测定
    • US06243980B1
    • 2001-06-12
    • US09035820
    • 1998-03-06
    • Irena BronsteinJohn VoytaMichelle PalmerBonnie Tillotson
    • Irena BronsteinJohn VoytaMichelle PalmerBonnie Tillotson
    • G01N33533
    • G01N33/582C12Q1/37G01N33/581G01N2333/81Y10S436/80Y10S436/805
    • Heterogenous and homogenous assays are provided for the detection of protease inhibitory activity in a sample or target compound, taking advantage of the chemiluminescent characteristics of 1,2-dioxetanes. In the heterogenous assay, a peptide bearing a cleavage site for the protease of interest is provided with a first member of a first ligand binding pair at one end, and a first member of a second ligand binding pair at the other end. The other member of the first ligand binding pair is attached to a surface, which binds the peptide, or protease substrate, to the surface. The peptide substrate is combined with the protease and target compound or sample. Substrate cleavage, if not inhibited, is allowed to occur, and any unbound cleaved fragments are removed. An enzyme complexed with the second member of the second ligand binding pair is added, and allowed to bind to any of the (uncleaved) first member of the second ligand binding pair remaining. Unbound complex is removed, and a 1,2-dioxetane substrate for the enzyme is added. If any peptide substrate has not been cleaved, the dioxetane will chemiluminesce, indicating inhibitory activity. In a homogenous assay, the same substrate bears at one end a fluorescent energy accepting moiety, and at the other end a 1,2-dioxetane or precursor. If the substrate is cleaved by the protease, the dioxetane and the fluorescent moiety are not in close physical relationship, and no energy transfer occurs when the dioxetane is caused to decompose. If cleavage has not occurred, indicating inhibition, when the dioxetane is caused to decompose, energy is transferred to the fluorescing entity, which releases light of a wavelength recognizably distinct from that of the dioxetane.
    • 提供异源和均一的测定法,用于检测样品或目标化合物中蛋白酶抑制活性,利用1,2-二氧杂环己烷的化学发光特性。 在异源测定中,具有目的蛋白酶的切割位点的肽在一端具有第一配体结合对的第一个成员,另一端具有第二配体结合对的第一个成员。 第一配体结合对的另一个成员连接到表面,其将肽或蛋白酶底物结合到表面。 将肽底物与蛋白酶和目标化合物或样品组合。 如果不抑制底物裂解,则可以发生底物裂解,并且去除任何未结合的切割的片段。 加入与第二配体结合对的第二个成员配合的酶,并使其与残留的第二配体结合对的任何(未切割的)第一个成员结合。 去除未结合的络合物,并加入酶的1,2-二氧环乙烷底物。 如果任何肽底物未被切割,二氧杂环丁烷将化学发光,表明抑制活性。 在同质测定中,相同的底物在一端承载荧光能量接受部分,另一端在1,2-二氧杂环丁烷或前体上。 如果底物被蛋白酶切割,二氧杂环丁烷和荧光部分不是很密切的物理关系,当二氧杂环丁烷分解时,不会发生能量转移。 如果没有发生裂解,表明抑制,当二氧杂环丁烷分解时,能量被转移到荧光实体,其释放与二氧杂环丁烷的波长可辨别的波长的光。
    • 6. 发明授权
    • Dioxetane labeled probes and detection assays employing the same
    • 二氧杂环丁烷标记的探针和使用其的检测测定
    • US06451531B1
    • 2002-09-17
    • US09340726
    • 1999-06-29
    • Irena BronsteinBrooks EdwardsChristopher MartinJohn Voyta
    • Irena BronsteinBrooks EdwardsChristopher MartinJohn Voyta
    • C12Q168
    • C07H21/00C07D321/00C12Q1/6816C12Q1/686Y02P20/55C12Q2561/101C12Q2565/113
    • Probes labeled with 1,2-dioxetane precursors can be employed in a variety of assays. The probes may be nucleic acid, peptide nucleic acid, proteins including enzyme, antibody or antigen, steroid, carbohydrate, drug or non-drug hapten. The probe is provided with a 1,2-dioxetane precursor bound thereto, generally either covalently, or a strong ligand bond. The dioxetane precursor moiety is converted to a bound 1,2-dioxetane by exposure to singlet oxygen. These dioxetane (labels) either spontaneously decompose, or are induced to decompose by an appropriate trigger to release light. The trigger may be a change in pH temperature, or an agent which removes a protective group. Assay formats in which these 1,2-dioxetane labeled probes and referents may be used to include hybridization assays, immuno assays, gel-based assays and Capillary Zone Electrophoresis.
    • 用1,2-二氧杂环丁烷前体标记的探针可用于多种测定。 探针可以是核酸,肽核酸,蛋白质,包括酶,抗体或抗原,类固醇,碳水化合物,药物或非药物半抗原。 探针具有与其结合的1,2-二氧杂环丁烷前体,通常共价或强配体键。 通过暴露于单线态氧将二氧杂环丁烷前体部分转化为结合的1,2-二氧环乙烷。 这些二氧杂环丁烷(标记)会自发分解,或被适当的触发剂诱导分解以释放光。 触发可能是pH温度的变化,或者是除去保护基团的试剂。 这些1,2-二氧杂环丁烷标记的探针和指示物可用于包括杂交测定,免疫测定,基于凝胶的测定和毛细管区域电泳的测定形式。