Assessment of angiotensin converting enzyme gene polymorphism in patients with psoriasis

Psoriatic patients had diversity of clinical presentations and complications. Psoriasis can have significant interference with the patient's quality of life, recovery, and outcome. Some evidences suggest that the angiotensin converting enzyme (ACE) is present in the skin of psoriatic patients. This study intended to assess the patterns of ACE insertion/deletion (ACE ID) polymorphism and the levels of serum ACE among psoriatic patients in comparison to normal controls. The study included two groups: 20 patients with psoriasis and 20 apparently healthy adults with negative family history of psoriasis as a control group. Psoriasis area and severity index (PASI) was used to measure of severity of psoriasis. In both groups, ACE ID gene polymorphism was assessed by quantitative real-time polymerase reaction and serum ACE levels was evaluated using an enzyme-linked immunosorbent assay. ACE ID genotype was significantly higher among the psoriatic group in comparison to the control group (40.0% versus 15.0%, respectively, p=0.016). D allele was significantly higher among the psoriatic group than the control group (25.0% versus 7.5%, respectively, p=0.034). ACE ID genotype carried significantly higher risk in psoriatic group versus control group (OR=3.8). The D allele carried higher risk in psoriatic group versus control group (OR=4.1). ACE serum levels were significantly higher among the psoriatic group compared to the control group (87.4±7.03 versus 2.3±0.7, respectively; p<0.001). We concluded that ACE ID gene polymorphism may be considered as a risk factor for developing psoriasis.