Alharbi KK, Alnbaheen MS, Alharbi FK, Hasanato RM, Khan IA. Q192R polymorphism in the PON1 gene and familial hypercholesterolemia in a Saudi population.
Ann Saudi Med 2017;
37:425-432. [PMID:
29229890 PMCID:
PMC6074118 DOI:
10.5144/0256-4947.2017.425]
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Abstract
BACKGROUND
Familial hypercholesterolemia (FH) is an autosomal dominant condition characterized by abnormal levels of low-density lipoprotein (LDL) in the blood. FH is a risk factor for atherosclerosis and cardiovascular disease. The relationship between the paraoxonase 1 (PON1) gene, atherosclerosis and coronary artery disease has not been studied in Saudi patients.
OBJECTIVE
To investigate the genetic associations of the Q192R polymorphism in the PON1 gene with FH in Saudi patients.
DESIGN
Case-control study.
SETTING
Tertiary care center, Riyadh.
METHODS
Two hundred Saudi patients were enrolled in this study, including 100 patients with FH and 100 healthy controls, during the period from January 2012 to March 2013. Serum was separated from coagulated blood (3 mL) and used for analysis of lipid profiles. Genomic DNA was isolated from anticoagulant-treated blood (2 mL). Genotyping for the Q192R polymorphism was performed by polymerase chain reaction-restriction fragment length polymorphism analysis, followed by 3% agarose gel electrophoresis.
MAIN OUTCOME MEASURE
The strength of association between the Q192R polymorphism and FH in the Saudi population.
RESULTS
We confirmed that QR versus QQ (odds ratio [OR]: 1.55; 95% confidence interval [CI]: 1.05-3.43; P=.03), QR+RR versus QQ (OR: 1.98; 95% CI: 1.13-3.49; P=.01), and R versus Q (OR: 1.68; 95% CI: 1.09- 2.59; P=.01) in the Q192R polymorphism were associated with FH in the Saudi population.
CONCLUSION
In conclusion, the Q192R polymorphism in the PON1 gene is associated with FH in the Saudi population. Our results confirmed that the R allele, QR, and dominant model genotypes were associated with FH.
LIMITATION
Only a single variant (Q192R) was analyzed, and the medical and family histories of the patients were not known.
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