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  • Title: Presence of the atrial natriuretic peptide in human cerebrospinal fluid.
    Author: Marumo F, Masuda T, Ando K.
    Journal: Biochem Biophys Res Commun; 1987 Mar 30; 143(3):813-8. PubMed ID: 2952122.
    Abstract:
    Using a highly sensitive and specific radioimmunoassay (RIA) for detection of the atrial natriuretic peptide (ANP), the presence of alpha-human ANP (alpha-hANP) in human cerebrospinal fluid (CSF) was confirmed. Its concentration in CSF, 3.6 +/- 2.3 pg/ml, n = 16, mean +/- SD, was remarkably lower than that in the plasma (161.8 +/- 157.4, p less than 0.0001). The regression coefficient between these concentrations was 0.320 (p = ns). Gel permeation chromatography conducted in conjunction with RIA indicated ANP in CSF to be eluted at the position of a low molecular weight form corresponding to alpha-hANP. No high molecular weight form could be detected. But in the plasma, both low and high molecular forms were found to be present. It is thus evident that ANP is present in human CSF and its origin may possibly be the brain and not the atrium.
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