title: Angiotensin-converting enzyme gene insertion/deletion (I/D) polymorphism in hypertensive patients with different degrees of obstructive sleep apnea.
abstract: To investigate the role of the angiotensin-converting enzyme gene (ACE) insertion (I)/deletion (D) polymorphism in hypertensive patients with different degrees of obstructive sleep apnea (OSA). A case-control study was performed. One hundred seventy four Chinese subjects were divided into four groups depending on the severity of OSA as follows: 1) normal control group (NC, n=68), 2) isolated hypertension group (HT, n=45), 3) hypertensive patients with mild OSA group (MO, n=27), and 4) hypertensive patients with moderate to severe OSA group (MSO, n=34). The distribution of ACE gene I/D allele and genotypes were analyzed in the subject population, as was an OSA pedigree. The study showed that the frequency of ACE gene I/D polymorphism differed significantly among the four groups. The frequency of I allele and II genotype were significantly higher in the MSO group than in the other groups (p<0.05). The distribution of I allele and II genotype showed no significant difference between any of the other groups (p>0.05, respectively). Meanwhile the higher frequency of I allele and II genotype was observed in the OSA pedigree. The higher frequency of ACE gene I allele and II genotype were closely associated with the hypertensive patients with MSO. The inherited factors played an important role in the pathogenesis of hypertensive patients with MSO.
authors.affiliation: Cardiovascular Institute and Fu Wai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: B
authors.initials: B
authors.lastname: Zhao
authors.lastname: Gesongluobu
authors.forename: Y
authors.initials: Y
authors.lastname: Sun
authors.forename: Y
authors.initials: Y
authors.lastname: Wu
authors.forename: W
authors.initials: W
authors.lastname: Pei
authors.forename: J
authors.initials: J
authors.lastname: Ye
authors.forename: R
authors.initials: R
authors.lastname: Hui
authors.forename: L
authors.initials: L
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D005192:Family Health; D005260:Female; D017353:Gene Deletion; D005838:Genotype; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000201:enzymology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D020181:Sleep Apnea, Obstructive / Q000150:complications / Q000201:enzymology / Q000235:genetics*
chemical_list: D007703:Peptidyl-Dipeptidase A