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Titel:

Exercise capacity after coarctation repair relates to the c.46A > G genomic polymorphism of the ss2-adrenoreceptor and the c.704T > C angiotensinogen polymorphism.

Dokumenttyp:
Journal Article
Autor(en):
Hager, A; Bildau, J; Kreuder, J; Schreiber, C; Kaemmerer, H; Hess, J
Abstract:
Even after excellent repair of aortic coarctation without restenosis there are limitations in exercise capacity at long-term follow-up. This study was performed to assess the contribution of inherited genomic polymorphisms to exercise capacity in patients without restenosis. Patients and methods: 122 patients aged 17-72 years, 46 female, 76 male, seen 2-27 years after repair of aortic coarctation with a residual brachial-ankle-gradient <=20 mmHg were investigated. Genomic polymorphism of angiotensin converting enzyme (ACE I/D), angiotensinogen (AGT, c.704C > T), angiotensin II receptor type 1 (AGTR1, c.1166A > C), endothelin 1 (EDN1, EDN1/ex5-c.5665G > T), G protein (GNB3, c.825C > T), and two polymorphisms each of the ß1-adrenoreceptor (ADRB1, c.145G > A and c.1165C > G), ß2-adrenoreceptor (ADRB2, c.46A > G and c.79C > G), and endothelial NO synthase (NOS3, intron 4 I/D and NOS3, c.894G > T) were determined by PCR amplification and fragment length analysis. Exercise capacity was determined by an upright bicycle exercise test.Only the c.46A > G polymorphism of the ADRB2 (p = 0.024) and the c.704T > C AGT polymorphism (p = 0.042) were positively correlated with peak workload. Patients with one or especially two polymorphic alleles showed a significant higher exercise performance compared with those patients homozygous for the wild type.In contrast to a previous study in heart failure patients, after coarctation repair adults had a better exercise capacity with the G allele of the ß2-receptor c.46A > G polymorphism. Therefore, the exercise capacity of coarctation patients does not profit from an enhanced down regulation of their beta receptors.
Zeitschriftentitel:
Eur J Prev Cardiol
Jahr:
2012
Band / Volume:
19
Heft / Issue:
2
Seitenangaben Beitrag:
199-204
Sprache:
eng
Volltext / DOI:
doi:10.1177/1741826711399991
PubMed:
http://view.ncbi.nlm.nih.gov/pubmed/21450583
Print-ISSN:
2047-4873
TUM Einrichtung:
Klinik für Herz- und Gefäßchirurgie (Prof. Lange)
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