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• W2023145319 endingPage "313" @default.
• W2023145319 startingPage "305" @default.
• W2023145319 abstract "We have developed a cell-free assay for binding of solubilized beta1 integrins to their physiologically relevant ligands using an electrochemiluminescent detection method. The method utilizes ruthenium-conjugated monoclonal antibodies for detection of either purified integrins or, more conveniently, integrin-expressing cell lysates, which are captured on beads coated with extracellular matrix or vascular ligand proteins. For the interaction of alpha1beta1 integrin with collagen IV, a signal of 10-fold over background was generated with samples containing only 10 ng (0.05 pmol) of integrin. This interaction is cation-dependent and can be inhibited by blocking antibodies to the alpha1 subunit. The method was extended to studies of ligand binding by integrins alpha2beta1, alpha4beta1, alpha5beta1, and alpha6beta1. For each integrin-ligand pair, the specificity of the interaction was verified with neutralizing antibodies against the specific integrin. The specific binding signal correlated with the activating ability of the labeled antibody used for detection, although the ability of divalent cations (Mn2+, Mg2+, Ca2+) to support integrin-ligand binding varied dramatically among the various integrin-ligand pairs. The assay provides a simple method for investigating integrin-ligand interactions without avidity and/or signaling effects which can complicate conventional cell-based assay methods." @default.
• W2023145319 created "2016-06-24" @default.
• W2023145319 creator A5007582903 @default.
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• W2023145319 date "2002-07-01" @default.
• W2023145319 modified "2023-10-18" @default.
• W2023145319 title "A Cell-Free Electrochemiluminescence Assay for Measuring β1-Integrin–Ligand Interactions" @default.
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• W2023145319 doi "https://doi.org/10.1006/abio.2002.5723" @default.
• W2023145319 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12123670" @default.
• W2023145319 hasPublicationYear "2002" @default.
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