title: Association between the N-acetylation genetic polymorphism and bronchial asthma.
abstract: OBJECTIVE
  Since polymorphic N-acetyltransferase 2 (NAT2) has been suggested as a susceptibility factor for atopic diseases, the study was undertaken to investigate whether an association exists between acetylation polymorphism and asthma patients with atopy.
  
  
  METHODS
  The frequencies of NAT2 alleles and genotypes were determined by PCR/RFLP in a total of 210 asthma patients (extrinsic (n = 108) and intrinsic (n = 102) asthmatics) and 240 control subjects. Presence of the NAT2*4 (wild-type) allele defined a NAT2 genotype as rapid and combinations of mutant alleles NAT2*5 A, *5B, *5C, *6 A, and *7B as slow.
  
  
  RESULTS
  Genotypes coding for slow acetylation were detected in 70.4, 58.4 and 58.3% of extrinsic asthmatics, but intrinsic asthmatics and control subjects, respectively. The frequency of slow acetylators was higher among extrinsic asthmatics than intrinsic asthmatics, this difference did not reach statistical significance (odds ratio 1.02, 95% confidence interval 0.64, 1.63, P = 0.085). However, we found a relatively moderate, but significantly higher, increased frequency of slow acetylators among extrinsic asthma patients compared with control subjects (odds ratio 1.70, 95% confidence interval 1.04, 2.76, P = 0.042).
  
  
  CONCLUSIONS
  This study shows an association between acetylation polymorphism and susceptibility to extrinsic asthma, but not to intrinsic asthma, suggesting a minor role of the NAT2 polymorphism in the development of atopic asthma.
authors.affiliation: Department of Pharmacology, Faculty of Medicine, University of Gaziantep, Gaziantep, Turkey.
authors.forename: Muradiye
authors.initials: M
authors.lastname: Nacak
authors.forename: A Sükrü
authors.initials: AS
authors.lastname: Aynacioglu
authors.forename: Ayten
authors.initials: A
authors.lastname: Filiz
authors.forename: Ingolf
authors.initials: I
authors.lastname: Cascorbi
authors.forename: M Emin
authors.initials: ME
authors.lastname: Erdal
authors.forename: Necat
authors.initials: N
authors.lastname: Yilmaz
authors.forename: Erhan
authors.initials: E
authors.lastname: Ekinci
authors.forename: Ivar
authors.initials: I
authors.lastname: Roots
mesh_terms: D000107:Acetylation; D000293:Adolescent; D000328:Adult; D000368:Aged; D000483:Alleles; D001191:Arylamine N-Acetyltransferase / Q000235:genetics; D001249:Asthma / Q000150:complications / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000150:complications / Q000235:genetics*; D007073:Immunoglobulin E / Q000097:blood; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D007073:Immunoglobulin E; D001191:Arylamine N-Acetyltransferase; C478900:NAT2 protein, human