ABSTRACT
<p><b>OBJECTIVE</b>To observe the association between ADRA1A gene polymorphism and autoantibodies against the alpha1-adrenergic receptor in hypertensive patients.</p><p><b>METHODS</b>A total of 396 patients with essential hypertension admitted to our hospital were selected and autoantibodies in sera were detected by ELISA, and patients were divided into the autoantibody positive and negative group. Genomic DNA was extracted from erythrocytes obtained from EDTA-treated blood by the Blood DNA extraction kit. Gene polymorphisms were detected by ligase detection reaction (LDR), including rs574584, rs1048101, rs3739216 and rs3802241. The frequency of genotypes and haplotype were analyzed.</p><p><b>RESULTS</b>The frequencies of detected genotypes between the autoantibody against the alpha1-adrenergic receptor positive group and negative group were similar (P > 0.05) while significant difference was in the frequencies of haplotypes (all P < 0.05). The frequencies of genotypes with rs1048101 (genotype C/C, C/T, P = 0.017) and rs3802241 (genotype A/A, A/G, P = 0.004) were significant different in autoantibody positive group compared to negative group in patients with stage 2.</p><p><b>CONCLUSION</b>ADRA1A gene polymorphism might correlate with the alpha1-adrenergic receptor autoantibody production in hypertensive patients.</p>