Background: Peripheral arterial disease (PAD) is an important consequence of atherosclerosis commonly determined based on the results of ankle-brachial index (ABI) measurements. Due to its limitations, the search for potential predictors of PAD severity is ongoing. Serum soluble Lectin-like oxidized low-density lipoprotein receptor-1 (sLOX-1) levels and LOX-1 polymorphism rs1050283 are candidates for predictors of PAD severity. This study aimed to investigate the association between the LOX-1 rs1050283 TT genotype and the severity of PAD.
Methods: This cross-sectional study involved PAD patients recruited consecutively. The patients were genotyped for rs1050283 (3’ UTR C>T) LOX-1 single nucleotide polymorphism using the sequencing method. Serum sLOX-1 levels were measured using ELISA. Data on ABI were collected, and the patients were categorized into mild and moderate to severe PAD groups.
Results: A total of 66 PAD patients with a mean age of 58.9 years participated in this study, which consisted of 45 patients with mild PAD and 21 patients with moderate to severe PAD. Multivariate logistic regression analysis showed that the TT genotype was associated with PAD severity compared to those with the CC genotype (odds ratio (OR): 15.0, 95% confidence intervals (CI): 1.1 – 209.0), while higher serum sLOX-1 levels were not. PAD severity was also associated with increasing age (OR: 5.7, 95% CI: 1.3 – 25.7) and male gender (OR: 6.0, 95% CI: 1.1 – 32.2).
Conclusion: TT genotype of LOX-1 rs1050283 polymorphism was associated with PAD severity, whereas higher serum sLOX-1 levels were not. In addition, increasing age and male gender were also associated with PAD severity.