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Relative cardiac expression of growth hormone receptor and insulin-like growth factor-I mRNA in congenital heart disease.

Artikel i vetenskaplig tidskrift
Författare Anders Nygren
Jan Sunnegårdh
Kerstin Albertsson-Wikland
Håkan Berggren
Jörgen Isgaard
Publicerad i Journal of endocrinological investigation
Volym 31
Nummer/häfte 3
Sidor 196-200
ISSN 1720-8386
Publiceringsår 2008
Publicerad vid Institutionen för medicin, avdelningen för invärtesmedicin
Institutionen för medicin, avdelningen för molekylär och klinisk medicin
Institutionen för kliniska vetenskaper
Sidor 196-200
Språk en
Länkar www.ncbi.nlm.nih.gov/entrez/query.f...
Ämnesord Adolescent, Biopsy, Body Mass Index, Child, Preschool, Female, Gene Expression, Growth Hormone, therapeutic use, Heart Defects, Congenital, metabolism, surgery, Humans, Infant, Infant, Newborn, Insulin-Like Growth Factor I, genetics, Male, Myocardium, chemistry, Polymerase Chain Reaction, RNA, Messenger, analysis, Receptors, Somatotropin, genetics
Ämneskategorier Medicin och Hälsovetenskap

Sammanfattning

GH may exert direct growth-promoting and metabolic actions on target tissues, but most of its effects are mediated by circulating (endocrine) or local (auto-/paracrine) IGF-I. The GH/IGF-I system has an important role in cardiac development and in maintaining the structure and function of the heart. A subgroup of children with pronounced heart defects will eventually need transplants, owing to congestive heart failure. Since the symptoms are often severe and may progress while waiting for surgery, it is necessary to develop supportive medical treatment. GH has been proposed as a therapeutic agent in adults with heart failure, but to date studies are lacking on children and more information is necessary. We have examined the expression of IGF-I mRNA and GH-receptor (GH-R) mRNA in children undergoing surgery for congenital heart disease. Eighteen children scheduled for open-heart surgery were included in the study. Right auricular biopsies were taken at the time of venous catheterization preceding cardiac bypass. The specimens were analysed using realtime PCR. We were able to show expression of both IGF-I mRNA and GH-R mRNA in the pediatric heart. The relative expressions were intercorrelated (r=0.75, p<0.001). GH-R mRNA correlated positively to standardized weight (r=0.65, p=0.004), body mass index (BMI) (r=0.59, p=0.01), and standardized BMI (r=0.59, p=0.01). IGF-I mRNA only correlated to BMI (r=0.50, p=0.04). This is the first study displaying cardiac expression of IGF-I mRNA and GH-R mRNA in children with congenital heart disease, although further studies are needed to define a role for GH in the treatment of these patients.

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