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Research Article

Development of a specific immunoassay to selectively measure active tryptase in airway samples

    Gizette Sperinde‡

    *Author for correspondence: Tel.: +1 650 866 6209;

    E-mail Address: sperinde.gizette@gene.com

    Department of Bio Analytical Sciences, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ‡Authors contributed equally

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    ,
    Meire Bremer‡

    Department of Ophthalmology, Metabolism, Neurology & Immunology Biomarker Development (OMNI-BD), Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ‡Authors contributed equally

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    ,
    Henry R Maun

    Department of Protein Engineering, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    Amos Baruch

    Department of Ophthalmology, Metabolism, Neurology & Immunology Biomarker Development (OMNI-BD), Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    Robert A Lazarus

    Department of Protein Engineering, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    James T Koerber

    Department of Antibody Engineering, 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    Rajesh Vij

    Department of Antibody Engineering, 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    Tangsheng Yi

    Department of Immunology & Infectious Diseases, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    ,
    Saloumeh K Fischer

    Department of Bio Analytical Sciences, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    &
    Tracy Staton

    Department of Ophthalmology, Metabolism, Neurology & Immunology Biomarker Development (OMNI-BD), Genentech Inc., 1 DNA Way, South San Francisco, CA 94080-4990, USA

    Published Online:https://doi.org/10.4155/bio-2020-0182

    Aim: Tryptase is a tetrameric trypsin-like serine protease contained within the secretory granules of mast cells and is an important mediator of allergic inflammatory responses in respiratory diseases. Detection of active tryptase in the airway may provide important information about asthma and other respiratory diseases. Materials & Methods: An activity based probe has been incorported within an immunoassay to allow for measurement of active tryptase in human tissues. Results: A specific Simoa immunoassay to measure active tryptase in nasosorption samples was developed and qualified using an activity-based probe label and a specific antitryptase capture antibody. Conclusion: The assay was capable of measuring active tryptase in human samples, which will enable evaluation of the role of tryptase proteolytic activity in human disease.

    Papers of special note have been highlighted as: • of interest

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