Beta1- and ? 2c-Adrenoreceptor Variants as Predictors of Clinical Aspects of Dilated Cardiomyopathy in People of African Ancestry : Cardiovascular Topics
Cardiovasc. j. Afr. (Online)
; 19(4): 188-193, 2008.
Article
en En
| AIM
| ID: biblio-1260382
Biblioteca responsable:
CG1.1
ABSTRACT
Background:
Although the Beta1-adrenoreceptor (AR) Gly389Arg and ?2c-AR Del322-325 gene variants are associated with the response to Beta-AR-blocker therapy; whether this effect is associated with the risk for heart failure; or the severity or progression of heart failure is uncertain.Aims:
To assess the relationship between Gly389Arg and Del322-325 variants and the presence; severity and progression of idiopathic dilated cardiomyopathy (IDC) in 403 black South African patients.Methods:
Genotypes were identified using a restriction fragment length olymorphism-based technique and automated sequencing. Left ventricular ejection fraction (LVEF) and dimensions were determined at baseline and in 132 patients after six months of standard medical therapy excluding Beta- AR-blockers (not indicated as standard care at the time of completing this study).Results:
All patients and controls genotyped for the ?2c-AR variant were homozygous for the Del322-325 (risk) allele. The Gly389Arg polymorphism was not associated with IDC (control n = 429) (Arg389 allele homozygosity odds ratio = 1.03; confidence limits = 0.78-1.35); nor did it predict LVEF and cavity dimensions either before or after therapy.Conclusion:
in patients homozygous for the risk allele of the ?2c-AR variant; the Beta1-AR variant neither increased the risk for IDC nor predicted its severity or progression in patients not receiving Beta-AR-blockers
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Base de datos:
AIM
Asunto principal:
Signos y Síntomas
/
Estudio Comparativo
/
Genotipo
/
Cardiomiopatías
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Cardiovasc. j. Afr. (Online)
Año:
2008
Tipo del documento:
Article