Association between the ABCA1-565C/T gene promoter polymorphism and coronary heart disease severity and cholesterol efflux in the Chinese Han population.
Genet Test Mol Biomarkers
; 19(7): 347-52, 2015 Jul.
Article
en En
| MEDLINE
| ID: mdl-26090796
ABSTRACT
BACKGROUND:
ABCA1 -565C/T gene promoter variants have been associated with the severity of coronary artery disease in Western populations. The purpose of our study was to investigate the association between the -565C/T gene polymorphism and coronary artery disease severity and cholesterol efflux in the Chinese Han population.METHODS:
A cohort of 298 acute coronary syndrome (ACS) patients and 541 healthy controls was genotyped using the highly sensitive ligase detection reaction. ABCA1 -565C/T genotype was correlated with the clinical features of 164 acute myocardial infarction (AMI) patients. Monocytes from patients with various -565C/T gene polymorphisms were isolated and differentiated into foam cells by coincubation with [(3)H]-labeled acetyl-low-density lipoprotein cholesterol. ABCA1 mRNA and protein expression levels were evaluated, as well as cellular cholesterol efflux.RESULTS:
The frequency of the TT genotype in the -565C/T polymorphism of ACS patients was significantly increased when compared with controls (0.211 vs. 0.162, p<0.05). The TT genotype, but not the CT or CC genotypes, in the -565C/T gene polymorphism correlated with the severity of the coronary lesion observed in AMI patients. Patients with the TT homozygote genotype also exhibited significantly lower cellular cholesterol efflux (TT [6.37%±0.554%]) levels than controls and also had the lowest levels of ABCA1 mRNA and protein expression among the group of variants. In contrast, cholesterol efflux levels in AMI patients with CT [11.35%±3.975%] and CC ([15.32%±6.293%]) genotypes were not significantly different from controls.CONCLUSIONS:
Impaired ABCA1-mediated cholesterol efflux in macrophages may be associated with the severity of the coronary lesions in AMI patients with the TT genotype at the -565C/T gene polymorphism.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Colesterol
/
Enfermedad Coronaria
/
Transportador 1 de Casete de Unión a ATP
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
País/Región como asunto:
Asia
Idioma:
En
Revista:
Genet Test Mol Biomarkers
Asunto de la revista:
BIOLOGIA MOLECULAR
/
GENETICA
Año:
2015
Tipo del documento:
Article