Atrial amyloid deposits in the failing human heart display both atrial and brain natriuretic peptide-like immunoreactivity

A. Pucci, J. Wharton, E. Arbustini, M. Grasso, M. Diegoli, P. Needleman, M. Vigano, J. M. Polak

Research output: Contribution to journalArticlepeer-review

Abstract

Atrial amyloid deposits are common in the ageing human heart and contain α-atrial natriuretic peptide (proANP99-126) immunoreactivity. However, atrial myocytes secrete both amino and carboxy terminal fragments of the ANP prohormone (proANP1-126) and also express an homologous, but separate brain natriuretic peptide (BNP). Characteristic amyloid deposits were identified in the atria of 9/22 patients (26-63 years of age) with end-stage heart failure. Amyloid fibrils displayed immunoreactivity for both amino and carboxy terminal fragments of proANP1-126 and for the distinct BNP sequence. As in other endocrine organs, both mature and precursor peptide sequences appear to be constituents of amyloid fibrils. Whilst immunoreactivity for cardiac peptide hormones is co-localized in atrial amyloid deposits, it is uncertain whether the increase in natriuretic peptide expression which accompanies cardiac failure contributes to the incidence of isolated atrial amyloidosis.

Original languageEnglish
Pages (from-to)235-241
Number of pages7
JournalJournal of Pathology
Volume165
Issue number3
Publication statusPublished - 1991

Keywords

  • Amyloid
  • ANP
  • BNP
  • Cardiodilatin
  • Heart failure
  • Immunoelectron microscopy
  • Natriuretic peptides

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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