title: [Association of glucose transporter 4 gene polymorphism with hypoxia caused by obstructive sleep apnea syndrome and with related inflammatory factors].
abstract: OBJECTIVE
  To investigate the relationship between genetic polymorphisms of glucose transporter 4 (GLUT4) and hypoxia caused by obstructive sleep apnea syndrome (OSAS) as well as with related inflammatory factors.
  
  
  METHODS
  Consecutive hypertension patients diagnosed at the People's Hospital of Xinjiang Uygur Autonomous Region were selected from January to December 2010. A total of 859 subjects with possible OSAS base on their histories and physical examination findings udner went the polysomnography and inflammatory factor determination, of whom 616 (72%) were diagnosed with moderate and severe hypoxia with OSAS (case group) and 243 (28%) without hypoxia or OASA (control group). Ninty-six patients from the case group underwent DNA sequencing at the functional domain of GLUT4 gene to screen for representative mutations. TaqMan PCR was used to genotyping then analyzed the relationship between locis of GLUT4 and hypoxia.
  
  
  RESULTS
  GLUT4 genome sequencing was performed in 96 severe OSAS patients and 4 mutated sites were found, among which 3 mutated sites (rs5415, rs4517, and rs5435) were selected according to the principle of linkage disequilibrium (r² > 0.8) and minimum gene allele frequency > 5%. All of single nucleotide polymorphisms (SNP) satisfied Hardy-Weinberg equilibrium (P>0.05). A significant association of GLUT4 SNP rs5417 allele carried in control subjects, compared with moderate and severe hypoxia in OSAS patients (P<0.05); AA+AC genotype relative to CC with low oxygen levels in subjects significantly reduced. The difference existed in overweight and obese patients, as well as in those aged more than 50 years (P<0.05). AA was still an independent protective factor for hypoxia caused by OSAS (OR=0.385, 95%CI = 0.210-0.704, P=0.002). Male (OR=1.635, 95% CI=1.037-2.577, P=0.034) and total cholesterol (OR=1.600, 95% CI=1.287-1.987, P<0.001) were independent risk factors associated with hypoxia. Normal weight(OR=0.059, 95% CI=0.037-0.094, P<0.001) and high density lipoprotein cholesterol (OR=0.337, 95% CI=0.171-0.666, P=0.002)were independent protective factors for hypoxia. The levels of monocyte chemoattractant protein-1 and C-reaction protein above CC were significantly higher than AA+AC (P<0.05).
  
  
  CONCLUSIONS
  Hypoxia caused by OSAS is associated with GLUT4 gene SNP rs5417.
authors.affiliation: Department of Clinical,Medical College of Shihezi University,Shihezi,Xinjiang 832000,China.
authors.forename: Ting
authors.initials: T
authors.lastname: Yin
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Nan-fang
authors.initials: NF
authors.lastname: Li
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Li-gen
authors.initials: LG
authors.lastname: Ai
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Xiao-guang
authors.initials: XG
authors.lastname: Yao
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Jing
authors.initials: J
authors.lastname: Hong
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Center of Hypertension of the People's Hospital of Xinjiang Uygur Autonomous Region,Center of Diagnosis,Treatment,and Research of Hypertension in Xinjiang,Urumqi 830001,China.
authors.forename: Jian-qiong
authors.initials: JQ
authors.lastname: Kong
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D051275:Glucose Transporter Type 4 / Q000235:genetics*; D006801:Humans; D000860:Hypoxia / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D020181:Sleep Apnea, Obstructive / Q000150:complications / Q000235:genetics*
chemical_list: D051275:Glucose Transporter Type 4; C495692:SLC2A4 protein, human