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Annals of Clinical Biochemistry

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Ann Clin Biochem 2008;45:349-355
doi:10.1258/acb.2007.007229
© 2008 Association for Clinical Biochemistry

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Review Article

Multiple molecular forms of circulating cardiac troponin: analytical and clinical significance

David C Gaze and Paul O Collinson


Chemical Pathology, St George's Hospital, Blackshaw Road, Tooting, London SW17 0QT, UK


Corresponding author: Dr David Gaze. Email: david.gaze{at}stgeorges.nhs.uk

Cardiac troponin T (cTnT) and I (cTnI) are highly specific and sensitive biomarkers of myocardial cell damage and are now accepted as the ‘gold standard’ diagnostic test for acute coronary syndrome and supersede the classical muscle enzyme biomarkers. While the understanding of the development and structure of the troponins has advanced, detailed biochemistry of the troponin molecules is complex and poorly understood. Many post-translational molecular forms of troponin are known to exist. The diversity of these circulating forms may have a clinical impact and the notion of a disease-specific troponin protein signature has been suggested. However, the effects of these multiple forms on commercial assay performance and their impact clinically are currently unknown and should be the focus of future research and assay design.


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