title: Association of a polymorphism in PON-1 gene with steroid-induced osteonecrosis of femoral head in Chinese Han population.
abstract: BACKGROUND
  Treatment with steroids covers a wide spectrum of diseases in clinic. However, some users are suffering from serious side effects of steroid administration, while we enjoy the benefit it brings about. Osteonecrosis of the femoral head (ONFH) is a troublesome one among them. Recent studies have demonstrated that lipid metabolism disorder may play a vital role in pathogenesis of ONFH and mutation of the paraoxonase-1 (PON-1) gene may be involved in the occurrence of this disease. However, the relationship between polymorphisms of PON-1 and ONFH has not been thoroughly studied. The aim of this study was to determine whether PON-1 polymorphisms are associated with steroid-induced ONFH through a cohort study among Chinese Han population.
  
  
  METHODS
  This trial applied a case-control scheme to compare the clinical data including PON-1 SNP among 94 patients and 106 control subjects to analyze the association between SNP and risk of steroid-induced ONFH. Time of Flight Mass Spectrometer is utilized for genotyping and the result was analyzed in multivariate analysis models.
  
  
  RESULTS
  According to polymorphism test of rs662, its SNP was significantly associated with the risk of ONFH in overdominant analysis model [P value: 0.022; odds ratio (OR): 0.39]. However, genotype frequencies of rs662 of PON-1 gene between case and control group showed no differences (P > 0.05).
  
  
  CONCLUSIONS
  Our data suggest for the first time that SNP (rs662) of the PON-1 gene was associated with the risk of steroid-induced ONFH. In addition, PAI-1 SNPs may play an important role in pathogenesis of ONFH.
  The virtual slide(s) for this article can be found here: http://www.diagnosticphatology.diagnomx.eu/vs/1501829501107336.
authors.forename: Zhiyao
authors.initials: Z
authors.lastname: Wang
authors.forename: Yanqiong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiangying
authors.initials: X
authors.lastname: Kong
authors.forename: Shangzhu
authors.initials: S
authors.lastname: Li
authors.forename: Yimin
authors.initials: Y
authors.lastname: Hu
authors.forename: Rongtian
authors.initials: R
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
authors.affiliation: Wangjing hospital (Hospital of Orthopedics and Traumatology), China Academy of Chinese Medical Sciences, Beijing 100102, China. linna888@163.com.
authors.forename: Na
authors.initials: N
authors.lastname: Lin
authors.forename: Weiheng
authors.initials: W
authors.lastname: Chen
mesh_terms: D000328:Adult; D043303:Aryldialkylphosphatase / Q000235:genetics*; D044466:Asian People / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005271:Femur Head Necrosis / Q000139:chemically induced* / Q000208:ethnology / Q000235:genetics*; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000208:ethnology / Q000235:genetics; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D012307:Risk Factors; D013256:Steroids / Q000009:adverse effects*
chemical_list: D013256:Steroids; D043303:Aryldialkylphosphatase; C468406:PON1 protein, human