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    • 6. 发明申请
    • Means and Methods for the determination of the biological activity of Neurotoxin polypeptides in cells
    • 用于测定细胞中神经毒素多肽的生物学活性的方法和方法
    • US20160202245A1
    • 2016-07-14
    • US14901123
    • 2014-06-26
    • MERZ PHARMA GMBH & CO. KGAA
    • Cornelia BRÜNN
    • G01N33/50G01N21/64
    • C07K16/18C07K2317/34G01N21/6428G01N33/5014G01N33/5058G01N33/5073G01N2021/6441G01N2333/33G01N2333/952
    • The present invention pertains to a method for directly determining the biological activity of a Neurotoxin polypeptide in cells, comprising the steps of: a) incubating cells susceptible to Neurotoxin intoxication with a Neurotoxin polypeptide for a time and under conditions which allow for the Neurotoxin polypeptide to exert its biological activity; b) fixing the cells and, optionally, permeabilizing the cells with a detergent; c) contacting the cells with at least a first capture antibody specifically binding to the non-cleaved and Neurotoxin-cleaved substrate and with at least a second capture antibody specifically binding to the cleavage site of the Neurotoxin-cleaved substrate, under conditions which allow for binding of said capture antibodies to said substrates; d) contacting the cells with at least a first detection antibody specifically binding to the first capture antibody, under conditions which allow for binding of said first detection antibody to said first capture antibody, thus forming first detection complexes, and at least a second detection antibody specifically binding to the second capture antibody, under conditions which allow for binding of said second detection antibody to said second capture antibody, thus forming second detection complexes; e) determining the amount of the first and second detection complexes of step d), and f) calculating the amount of substrate cleaved by said Neurotoxin polypeptide in said cells by means of the second detection complexes, thereby determining the biological activity of said Neurotoxin polypeptide in said cells. The invention further provides for a kit for carrying out the method of the invention.
    • 本发明涉及直接测定神经毒素多肽在细胞中的生物学活性的方法,包括以下步骤:a)在神经毒素多肽对神经毒素中毒敏感的情况下,使神经毒素多肽在一段时间内和在允许神经毒素多肽 发挥其生物活性; b)固定细胞,并且任选地用洗涤剂使细胞透化; c)在允许细胞与至少一种特异性结合未切割和神经毒素切割的底物的第一捕获抗体和至少一种特异性结合神经毒素切割的底物的切割位点的第二捕获抗体上接触细胞, 所述捕获抗体与所述底物结合; d)在允许所述第一检测抗体与所述第一捕获抗体结合从而形成第一检测复合物和至少第二检测抗体的条件下,使细胞与至少一种特异性结合第一捕获抗体的第一检测抗体接触 在允许所述第二检测抗体与所述第二捕获抗体结合的条件下,特异性结合第二捕捉抗体,从而形成第二检测复合物; e)确定步骤d)的第一和第二检测复合物的量,和f)通过所述第二检测复合物计算由所述神经毒素多肽在所述细胞中切割的底物的量,由此确定所述神经毒素多肽的生物学活性 在所述细胞中。 本发明还提供了用于实施本发明方法的试剂盒。
    • 8. 发明申请
    • Methods and Compositions for Detecting Botulinum Neurotoxin
    • 检测肉毒杆菌神经毒素的方法和组成
    • US20150253326A1
    • 2015-09-10
    • US14624775
    • 2015-02-18
    • Wisconsin Alumni Research Foundation
    • Edwin R. ChapmanMin Dong
    • G01N33/569C07K14/435C07K14/705G01N33/542
    • G01N33/573C07K14/435C07K14/43595C07K14/705C07K2319/50C07K2319/60C12Y304/24069G01N33/542G01N33/56911G01N2333/33G01N2333/952
    • The present invention provides a molecular construct capable of fluorescent resonance energy transfer (FRET), comprising a linker peptide, and donor and acceptor fluorophore moieties, where the linker peptide is a substrate of a botulinum neurotoxin selected from the group consisting of synaptobrevin, syntaxin and SNAP-25, or a fragment thereof capable being cleaved by the botulinum neurotoxin, and separates the donor and acceptor fluorophores by a distance of not more than 10 nm, and where emission spectrum of the donor fluorophore moiety overlaps with the excitation spectrum of the acceptor fluorophore moiety; or where the emission spectra of the fluorophores are detectably different. Also provided are isolated nucleic acid expressing the construct, kits comprising said construct and cell lines comprising said nucleic acid. Further provided are methods of detecting a BoNT using the above described construct via FRET, and methods for detecting a BoNT using surface plasmon resonance imaging.
    • 本发明提供了能够进行荧光共振能量转移(FRET)的分子构建体,其包含接头肽和供体和受体荧光团部分,其中连接肽是肉毒神经毒素的底物,其选自突触链突起目,突触蛋白和突触体 SNAP-25或其能够被肉毒杆菌神经毒素切割的片段,并且将供体和受体荧光团分开不超过10nm的距离,并且其中供体荧光团部分的发射光谱与受体的激发光谱重叠 荧光团部分; 或者其中荧光团的发射光谱可检测地不同。 还提供了表达构建体的分离的核酸,包含所述构建体的试剂盒和包含所述核酸的细胞系。 还提供了通过FRET使用上述构造检测BoNT的方法,以及使用表面等离子体共振成像检测BoNT的方法。
    • 9. 发明授权
    • Resonance energy transfer assay with cleavage sequence and spacer
    • 具有切割序列和间隔区的共振能量转移测定
    • US08969016B2
    • 2015-03-03
    • US13625723
    • 2012-09-24
    • Biosentinel, Inc.
    • Robert D. FishMin Dong
    • G01N33/53G01N31/00C07K19/00C12Q1/37G01N33/542G01N33/94
    • C12Q1/37C07K14/00C07K14/47C07K19/00C07K2319/50C07K2319/60G01N21/6428G01N33/542G01N33/9406G01N2021/6432G01N2333/952
    • A molecular construct comprises a donor label, an acceptor label, a linker peptide disposed between the donor and the acceptor, the linker having a cleavage site sequence, and a spacer between at least one of (a) the donor and the cleavage site sequence and (b) the acceptor and the cleavage site sequence. Preferably, the construct is selected from the group consisting of CFP-(SGLRSRA)-SNAP-25-(SNS)-YFP, and CFP-(SGLRSRA)-synaptobrevin-(SNS)-YFP. In preferred embodiments, the linker peptide is a substrate of a botulinum neurotoxin selected from the group consisting of synaptobrevin (VAMP), syntaxin and SNAP-25, or a fragment thereof that can be recognized and cleaved by the botulinum neurotoxin. Advantageously, the spacer increases the electronic coupling between the donor label and the acceptor label relative to a corresponding construct without the spacer.
    • 分子构建体包括供体标记,受体标记,置于供体和受体之间的接头肽,接头具有切割位点序列,以及(a)供体和切割位点序列之间的间隔基和 (b)受体和切割位点序列。 优选地,构建体选自CFP-(SGLRSRA)-SNAP-25-(SNS)-YFP和CFP-(SGLRSRA)-Synaptobrevin-(SNS)-YFP。 在优选的实施方案中,接头肽是肉毒杆菌神经毒素的底物,其选自由肉毒杆菌神经毒素可识别和切割的突触连锁蛋白(VAP),突触蛋白(S)或SNAP-25,或其片段。 有利地,间隔物相对于没有间隔物的相应构建体增加了供体标签和受体标记之间的电子偶联。