title: Impact of CCR2 and SDF1 polymorphisms on disease progression in HIV-infected subjects in Thailand.
abstract: BACKGROUND
  The genotypic polymorphisms of CCR5, CCR2, and SDF1 were analyzed to determine their impact as potential confounders with regard to disease progression because of the role that host genetic factors appear to be involved in determining rates of disease progression.
  
  
  METHODS
  Genomic DNA was extracted from Ethylenediaminetetraacetate whole blood using Qiagen DNA extraction kit. The amplification of CCR5, CCR2, and SDF1 genes was performed by PCR.
  
  
  RESULTS
  Two hundred and twenty-one samples were genotyped for the CCR5, CCR2, and SDF1 mutation. Among these, all (100%) were identified as wild type for CCR5. All were then investigated considering the impact on CD4+ T-cell counts. Samples were divided into two groups based on the CD4+ T-cell numbers. It revealed that in the group of CD4+ T-cell counts ≥200 cells/μl, 15 were found for the homozygous for SDF1 gene (3'A/3'A) whereas one was found in the group of CD4+ T-cell counts <200 cells/μl. Homozygosity for the CCR2 polymorphisms (64I/64I) were five in the group of CD4+ T-cell counts ≥200 cells/μl and none were found in the group of CD4+ T-cell counts <200 cells/μl. These results demonstrated that there was a significant association between CD4+ T-cell numbers and CCR2 and SDF1 polymorphisms (P < 0.001).
  
  
  CONCLUSIONS
  The mutation of CCR2 and SDF1 genes showed a significant difference in the distribution of CD4+ T-cell numbers (P < 0.001) whereas mutation of chemokine coreceptor CCR5 was not appeared to be associated with the impact of CD4+ T-cell counts.
authors: Department of Transfusion Medicine, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand. palanee@gmail.com
authors: Palanee
authors: P
authors: Ammaranond
authors: Sayompoo
authors: S
authors: Sanguansitthianan
authors: Poonlaph
authors: P
authors: Phaengchomduan
authors: Chanachai
authors: C
authors: Sae-Lee
authors: Sirimarn
authors: S
authors: Mardkhumchan
mesh_terms: D000328:Adult; D000368:Aged; D018791:CD4 Lymphocyte Count; D054377:Chemokine CXCL12 / Q000235:genetics*; D016009:Chi-Square Distribution; D018450:Disease Progression; D005260:Female; D015658:HIV Infections / Q000235:genetics* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D054390:Receptors, CCR2 / Q000235:genetics*; D019713:Receptors, CCR5 / Q000235:genetics; D018709:Statistics, Nonparametric; D013785:Thailand; D055815:Young Adult
chemical_list: C515334:CCR2 protein, human; C515255:CXCL12 protein, human; D054377:Chemokine CXCL12; D054390:Receptors, CCR2; D019713:Receptors, CCR5