title: The SDF-1α3'A genetic variation is correlated with susceptibility of asthma in Iranian patients.
abstract: OBJECTIVE
  Chemokine/receptor axis is a predominant actor of clinical disorders. They are key factors of pathogenesis of almost all clinical situations including asthma. Correspondingly, CXCL12 is involved in the immune responses. Therefore, this study was designed to explore the association between gene polymorphism at position +801 of CXCL12, known as SDF-1α3'A, and susceptibility to asthma in Iranian patients.
  
  
  METHODS
  In this experimental study, samples were taken from 162 asthma patients and 189 healthy controls on EDTA. DNA was extracted and analyzed for CXCL12 polymorphisms using PCR-RLFP. The demographic information was also collected in parallel with the experimental part of the study by a questionnaire which was designed specifically for this study.
  
  
  RESULTS
  Our results indicated a significant difference (P < 0.0001) between the A/A, A/G, and G/G genotypes and A and G alleles of polymorphisms at position +801 of CXCL12. We also showed an elevated level of CXCL12 circulating level in Iranian asthma patients.
  
  
  CONCLUSIONS
  Our findings suggest that SDF-1α3'A (CXCL12) polymorphism plays a role in pathogenesis of asthma. It can also be concluded that circulatory level of CXCL12 presumably can be used as one of the pivotal biological markers in diagnosis of asthma.
authors.affiliation: Immunology Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Houshang
authors.initials: H
authors.lastname: Rafatpanah
authors.forename: Masoud
authors.initials: M
authors.lastname: Amin
authors.forename: Mohsen
authors.initials: M
authors.lastname: Ghasemshirazi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Kazemiarababadi
authors.forename: Hossein
authors.initials: H
authors.lastname: Khorramdelazad
authors.forename: Hamid
authors.initials: H
authors.lastname: Abousaidi
authors.forename: Ziba
authors.initials: Z
authors.lastname: Shabani
authors.forename: Ahmadreza
authors.initials: A
authors.lastname: Sayadi
authors.forename: Gholamhossein
authors.initials: G
authors.lastname: Hassanshahi
authors.forename: Jamile
authors.initials: J
authors.lastname: Samadi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000483:Alleles; D001249:Asthma / Q000235:genetics* / Q000473:pathology; D054377:Chemokine CXCL12 / Q000235:genetics*; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged
chemical_list: D054377:Chemokine CXCL12
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