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Procollagen type III amino-terminal propeptide: a serum biomarker of left ventricular remodelling in paediatric dilated cardiomyopathy

Published online by Cambridge University Press:  06 November 2013

Beth D. Kaufman*
Affiliation:
Department of Pediatrics, Division of Cardiology, Lucille Packard Children's Hospital, Stanford University School of Medicine, Palo Alto, United States of America
Nancy Videon
Affiliation:
Clinical Trials Office, Children’s Hospital of Philadelphia, Philadelphia, United States of America
Xuemei Zhang
Affiliation:
Department of Biostatistics and Data Management, Children’s Hospital of Philadelphia, Westat, Philadelphia, United States of America
Matthew A. Harris
Affiliation:
Department of Pediatrics, Division of Cardiology, Children’s Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States of America
Robert E. Shaddy
Affiliation:
Department of Pediatrics, Division of Cardiology, Children’s Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States of America
Elizabeth Goldmuntz
Affiliation:
Department of Pediatrics, Division of Cardiology, Children’s Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States of America
*
Correspondence to: Dr B. D. Kaufman, MD, Department of Pediatrics, Division of Pediatric Cardiology, Lucille Packard Children’s Hospital, 750 Welch Road, Suite 325, Palo Alto, California 94304, United States of America. Tel: 650-736-7419; Fax: 650-725-8343; E-mail: bethkaufman@stanford.edu

Abstract

Background

Procollagen type III amino-terminal propeptide is a collagen III cleavage product released in blood. The serum levels of this propeptide in adults with dilated cardiomyopathy are associated with cardiac remodelling and prognosis. The utility of procollagen type III amino-terminal propeptide as a biomarker in paediatric dilated cardiomyopathy is unknown.

Methods

This was a prospective, longitudinal study of children with dilated cardiomyopathy and changes in procollagen type III amino-terminal propeptide. The serum level of propeptide was measured serially, compared with paediatric normal values, and correlated with clinical status and left ventricular size and function on echocardiograms and cardiac magnetic resonance imaging.

Results

Procollagen type III amino-terminal propeptide was measured serially in 149 samples from 39 patients, age 9.0±6.4 years, followed up for 16.8±16.3 months. Procollagen type III amino-terminal propeptide in dilated cardiomyopathy was higher than in normal children. On multivariate analyses, procollagen type III amino-terminal propeptide had a positive correlation with left ventricular dilation, left ventricular end-diastolic diameter index (p<0.0001), and left ventricular end-diastolic diameter Z-score (p=0.0003), and a negative correlation with shortening fraction changes over time (p=0.001). Patients with myocarditis (n=12) had higher procollagen type III amino-terminal propeptide values than those with idiopathic dilated cardiomyopathy (n=20).

Conclusions

Procollagen type III amino-terminal propeptide increases with left ventricular dilation and decreases with improvement in systolic function in paediatric dilated cardiomyopathy, indicating a role as a biomarker of cardiac remodelling in children. The diagnostic utility of procollagen type III amino-terminal propeptide to differentiate myocarditis from idiopathic dilated cardiomyopathy warrants further investigation.

Type
Original Articles
Copyright
Copyright &#x00A9; Cambridge University Press 2013 

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