Polymorphism of ADAMTS-13 gene rs28503257 in Iraqipatients with Hypertension

The aim of this study was to investigate the association of polymorphism of ADAMTS-13 gene to the susceptibility of hypertension in patients with hypertension in an Iraqi population. Forty-five hypertensive patients (23 males and 22 females), their age 40-70 years and 35 healthy controls (18 males and 17 females), their age range between 40-70 years. were selected from Wasit Province using a convenient sampling method. Genetic polymorphism of ADAMTS13) rs28503257 A/G was carried out using TaqMan -PCR. In patients and controls, the genotypic and allelic distributions of adisentgrine and metallopeptedase with a thrombospondin type1 motife13(ADAMTS13) rs28503257 A/G of the study populations were consistent with Hardy-Weinberg equilibrium. The genotypes frequecies of ADAMTS-13 rs 28503257 A/G of patients with hypertension manifested non-significant differences when compared with healthy control group AA =40(89%), AG =5(11) in patients vs. 30(86), 5(14) P=0.67 in controls for each genotype respectively. There were no hypertensive patients or controls carrying the genotype GG in the study sample. The A and G allele frequencies in SNP rs28503257 A/G were not significantly different between the two groups (P>0.05). The A allele was the major one in studied groups with a percent of (0.9286) and (0.9444) in control and patients groups respectively. Whereas the A allele was the minor one with a percent of (0.0714) and (0.0556) in these groups respectively. The association analysis revealed that individuals carrying the homozygous AA genotype were assocaited with hypertension OR=1.3333 (CI95% 0.3537 to 5.0259) and P= 0.6709 indicating that a positive association with the disease.However,the individuals with a hetrozygous AG genotype showed negative association with the disease OR= 0.7500 (CI95% 0.1990 to 2.8271) ,P=0.6709. Although no individuals carrying the genotype GG were observed in patients and controls, the odds ratio can be calculated in the presence of other genotypes OR= 0.7802 (CI95% 0.0151 to 40.2986), P= 0. 9019.These results suggest that the A allele may be considered as a risk allele in hypertension whereas the G allele is a protective allele agianst hypertension. The genetic model for ADAMTS-13 in comparison between hypertensive patients and controls .The dominant model indicated that patients of(AG+GG/AA) genotypes decreased the association with hypertension comparing with control with OR=1.333 CI95%0.3537 to 5.025: patients (40/5 and 0.00) in patients vs.(30/5 and 0.00) with OR== 0.7500(CI95%0.1990 to 2.8271) , P =0.6709,P=0.6709.The recessive model revealed that patients carrier the genotype(AA+AG/GG) increased the association with the disease (0.0/40 and 5) in patients compared with controls(0.00/30 and 5) with OR=1.2817(CI95% 0.0248 to 66.199), P=0. 9019.The Over dominant model revealed that patients carrier the genotype (AA+GG/AG) increased the association with the disease (0.040 and 5) in patients compared with controls (0.00/30 and 5) with OR=1.3333(CI95%0.3537 to5.0259),P=0.6709. In coclusion, the polymorphisms ADAMTS-13 rs28503257 variant A/G with are associated with the susceptibility of hypertension.