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Laboratoire de biochimie A, Hôpital Cochin APHP, 27 rue du faubourg Saint Jacques, France. didier.borderie@cch.aphp.fr
To understand the principles and limits of the methodologies used for the measurement of S-nitrosylated proteins.
Among methods for studying protein S-nitrosylation, chemoluminescence and biotin switch assay have rapidly gained popularity. However, recent findings have attempted to highlight potential pitfalls for these methods. Many assays for biological S-nitrosylated proteins are used near the limit of detection and pretreatment of the biological samples can modify the S-NO bond. These results suggest that additional controls are essential in order to identify S-nitrosylated proteins and results should be quantitatively validated using more than one methodology.
Protein S-nitrosylation is emerging as a key mechanism by which nitric oxide regulates cell signalling. This review focuses on existing methodologies for the measurement of S-nitrosylated proteins in biological matrices and the potential pitfalls of each method.
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