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Summary

Background

The gene coding for angiotensin-converting enzyme (ACE) has been reported to be associated with the development of psoriasis.

Aim

To evaluate the association of psoriasis risk and ACE polymorphisms.

Methods

We carried out a retrieval of studies that explored associations between ACE polymorphism and psoriasis, and analysed the genotype frequencies.

Results

In total, 8 studies with 1242 patients and 1646 controls were included. The genotype frequencies in all studies were in Hardy–Weinberg equilibrium. After pooling all studies, the results indicated that the I/I genotype was associated with risk of psoriasis (OR = 1.41, 95% CI 1.11–1.80, = 0.005), whereas the I/D genotype may decrease the risk of psoriasis (OR = 0.71, 95% CI 0.56–0.90, = 0.005) in Asian, but not in white populations.

Conclusions

Our study suggests that ACE polymorphism are associated with the risk of psoriasis in Asians, especially the I/I genotype and I allele. Further studies are needed to confirm our results.