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The D polymorphism of angiotensin converting enzyme  (ACE)  gene has been found to be associated with various diseases, and ACE may also be involved in the pathogenesis of erectile dysfunction. On the other hand, interpretation of the data on the association of  DD  genotype with various diseases is controversial, due to methodological and technical variations in detection of the polymorphisms. We investigated a possible association between the  DD  genotype and erectile dysfunction in a Korean population, and compared the frequency of  ACE  genotypes using our multiplexed PCR method with those based on the conventional PCR method in a sample of erectile dysfunctional and control subjects. There was significant difference in the distribution of  ACE  genotypes between the erectile dysfunctional (conventional PCR) and the control subjects (multiplexed PCR) (χ 2 =7.395, p&lt;0.05), but there was no significant difference in the distribution of the genotypes between both groups (χ 2 =0.815, p&lt;0.05) when our multiplexed PCR method was used. Therefore our results suggest that especially the conventional PCR method for  ACE  gene polymorphism may require careful control and may need repeated testing to verify the insertion deletion (ID) heterozygotes, and that a multiplexed PCR method can markedly increase the detection rate of the I allele in ID heterozygotes. No association was found between I/D polymorphism and erectile dysfunctional subjects in the Korean population studied.

clinical chemistry and laboratory medicine

Determination of Human Angiotensin Converting Enzyme (ACE) Gene Polymorphisms in Erectile Dysfunction: Frequency Differences of ACE Gene Polymorphisms according to the Method of Analysis