[Association study between the angiotensin converting enzyme gene insertion/deletion polymorphism and Qinghai Han Chinese with congenital heart disease].

Objective: The aim of this work is to determine whether the angiotensin converting enzyme (ACE) I/D (insertion/deletion) polymorphism is associated with the susceptibility to congenital heart disease (CHD) in the Qinghai Han Chinese.

Methods: This study enrolled 59 CHD patients and 193 CHD controls from Qinghai Cardiovascular Diseases Vocational Hospital. Blood samples were collected from each of the patient and control groups. The ACE-I/D polymorphism was detected by polymerase chain reaction (PCR).

Results: The genotype frequencies of ACE-I/D for Ⅱ, ID, DD in patients and controls were 0.475, 0.441, 0.085 and 0.430, 0.446, 0.124, respectively. The allelic frequencies of I and D were 0.650, 0.350 and 0.695, 0.305, respectively. The OR of ID, DD and D alleles relative to Ⅱ for CHD was 1.116 (0.604-2.060), 1.619 (0.564-4.648) and 1.211 (0.777-1.889). There was no significant difference of the genotypic and the allelic frequencies in ACE-I/D polymorphism between the patient and control groups.

Conclusions: There is no relation between ACE-I/D polymorphism and CHD in current Qinghai Han Chinese.