Decreased frequencies of ABCA1 polymorphisms R219K and V771M in Hungarian patients with cerebrovascular and cardiovascular diseases.
OBJECTIVE
Genetic polymorphisms in ABC transporter A1 (ABCA1) may alter the regulation of plasma high-density lipoprotein (HDL), promoting or protecting from vascular diseases.


METHODS
We investigated 244 unrelated, consecutively enrolled patients with ischemic stroke, 150 patients with coronary heart disease (CHD) and 193 blood donors for allele frequencies (AFs) of three common ABCA1 polymorphisms (R219K, V771M and I883M).


RESULTS
Compared to controls (30.8 +/- 4.7 and 4.9 +/- 2.2%, respectively), decreased AFs were found in both patient groups for R219K and V771M (28.7 +/- 4.1 and 3.1 +/- 1.6% in stroke, and 25.7 +/- 5.0%; 1.3 +/- 1.3% in CHD patients, respectively). In a subset of stroke patients younger than 50, both variants occurred in significantly lower frequencies (22.4 +/- 5.5 and 1.8 +/- 1.7%, respectively). Similarly, among CHD patients younger than 60, AFs of R219K and V771M (22.6 +/- 7.5 and 0 +/- 1.6%, respectively) were decreased. V771M was almost exclusively (35/36) found in individuals carrying the R219K allele.


CONCLUSIONS
Our data confirm earlier observations that ABCA1 R219K and V771M polymorphisms may be associated with a protective role against CHD and extend those to another important pathologic condition, namely stroke.
Andrikovics
Hajnalka
H
Department of Molecular Genetics, National Medical Center, Budapest, Hungary.
Pongrácz
Endre
E
Kalina
Ethkos
E
Szilvási
Anikó
A
Aslanidis
Charalampos
C
Schmitz
Gerd
G
Tordai
Attila
A
D064286:ATP Binding Cassette Transporter 1; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D006814:Hungary; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000235:genetics*; D011110:Polymorphism, Genetic; D020521:Stroke / Q000235:genetics*
C577836:ABCA1 protein, human; D064286:ATP Binding Cassette Transporter 1; D018528:ATP-Binding Cassette Transporters