The investigators hypothesized that genetic variants of G protein influence the development of restenosis and clinical outcome of patients receiving drug-eluting stents (DES).

NCT01670396

Conditions

1. Coronary Artery Disease

MeSH:Coronary Artery Disease

HPO:Coronary artery atherosclerosis

The initial and subsequent studies suggest that the T allele of C825T polymorphism is associated with enhanced transmembrane signaling via Gi proteins. --- C825T ---

The response to therapy with a fixed dose combination of isosorbide dinitrate and hydralazine (FDC I/H) is enhanced in African Americans with heart failure and reduced ejection fraction (HFrEF) when compared to similar white cohorts. This study will seek to confirm the previous genetic sub-study from AHeFT which suggested a functional polymorphism of guanine nucleotide binding protein beta polypeptide 3 subunit (GNB3), C825T in exon 10, influences the therapeutic efficacy of FDC I/H. This study will initiate treatment with FDC I/H in 500 self designated African American subjects with systolic heart failure. They will be followed for up to two years on therapy. Clinical outcomes (survival, heart failure hospitalizations, and change in quality of life) on FDC I/H will be compared by GNB3 genotype subset. The hypothesis to be confirmed is that subjects homozygous for the T allele (those with the GNB3 TT genotype which is present in approximately 50% of black subjects) demonstrate enhanced therapeutic benefit from FDC I/H.

NCT02305095

Conditions

1. Heart Failure

Interventions

1. Drug: FDC I/H

MeSH:Heart Failure

HPO:Abnormal left ventricular function Congestive heart failure Right ventricular failure

This study will seek to confirm the previous genetic sub-study from AHeFT which suggested a functional polymorphism of guanine nucleotide binding protein beta polypeptide 3 subunit (GNB3), C825T in exon 10, influences the therapeutic efficacy of FDC I/H. --- C825T ---