ArticleJournal of visualized experiments : JoVE2024
Determining the Serum Stability of Human Adenosine Deaminase 1 Enzyme.
Article in Journal of visualized experiments : JoVE, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
The concept of enzyme stability is typically used to refer to an enzyme's thermostability - its ability to retain structure and activity as temperature increases. For a therapeutic enzyme, other measures of stability may also be critical, particularly its ability to retain function in human serum at 37 °C, which we refer to as serum stability. Here, we describe an in vitro assay to assess the serum stability of the wildtype Homo sapiens adenosine deaminase I (HsADA1) enzyme using an absorbance-based microplate procedure. Specifically, this manuscript describes the preparation of buffers and reagents, a method arranging for the coincubation of HsADA1 in serum, a method to analyze the test samples using a microplate reader, and an accompanying analysis to determine the fraction of activity that an HsADA1 enzyme retains in serum as a function of time. We further discuss considerations to adapt this protocol to other enzymes, using an example of a Homo sapiens kynureninase enzyme, to help aid the protocol's adaptation to other enzymes where serum stability is of interest.
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