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Measurement of the total proANP product in mammals by processing independent analysis

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The cellular processing of natriuretic propeptides is attenuated in heart disease, resulting in release of a mixture of unprocessed precursor, partially processed fragments, and the bioactive hormone. Here, we report a species-independent method for quantification of pro-atrial natriuretic peptide (proANP) and its products irrespective of variable post-translational processing. The processing-independent assay (PIA) was developed raising mono-specific antibodies against the C-terminus of sequence 1-16 in proANP. The assay procedure included plasma extraction followed by tryptic cleavage, which releases the assay epitope from the N-terminal region. The PIA was tested in elderly patients with symptoms of heart failure (n=450), in pigs with acute myocardial infarction (n=21), and in normal dogs and dogs with heart failure (n=77). The epitope specificity permitted reliable measurement in man, dog, cat and pig. In human plasma, the PIA correlated well with an established proANP analysis (r=0.86, P
OriginalsprogEngelsk
TidsskriftJournal of Immunological Methods
Vol/bind370
Udgave nummer1-2
Sider (fra-til)104-10
Antal sider7
ISSN0022-1759
DOI
StatusUdgivet - 2011

ID: 33124852