Functional polymorphisms in FAS/FASL system increase the risk of neuroblastoma in Chinese population

PLoS One. 2013 Aug 12;8(8):e71656. doi: 10.1371/journal.pone.0071656. eCollection 2013.

Abstract

The FAS and FASL system plays a substantial role in apoptosis and immune escape of cells. Three polymorphisms located in the promoter regions of FAS (-1377G/A and -670A/G) and FASL (-844T/C) have been shown to alter the transcriptional activity of the genes, respectively. This study was conducted to evaluate the effects of these polymorphisms on the susceptibility of neuroblastoma in the Chinese population. A total of 203 patients with neuroblastoma and 411 controls were recruited in this case-control study. Polymerase chain reaction-based restriction fragment length polymorphism (PCR-RFLP) was applied for genotyping. Unconditional logistic regression was used to estimate cancer risk by calculating odds ratios (ORs) and their 95% confidence intervals (95% CIs). It was observed that significantly increased risks of neuroblastoma associated with FAS -1377G/A and FASL -844T/C polymorphisms, with ORs equal to 1.55 (95% CI, 1.10-2.20) for FAS -1377 A allele and 2.90 (95% CI, 2.04-4.12) for FASL -844CC genotype carriers compared with non-carriers, respectively. However, no association was found between the polymorphisms of FAS -670A/G and risk of neuroblastoma. In addition, the cumulative effect of FAS and FASL polymorphisms on risk of neuroblastoma was observed (P for trend = 2.502×10(-10)), with OR for the carriers of both FAS -1377A allele and FASL -844CC genotypes equaled to 3.95 (95% CI, 2.40-6.51). This work reveals that polymorphisms of FAS -1377G/A and FASL -844T/C but not FAS -670A/G are associated with risk of neuroblastoma in Chinese. These findings support the hypothesis that genetic polymorphism in FAS/FASL death system may influence individual susceptibility to neuroblastoma.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Alleles
  • Asian People / genetics
  • Case-Control Studies
  • Child, Preschool
  • China
  • Fas Ligand Protein / genetics*
  • Female
  • Gene Frequency
  • Genetic Predisposition to Disease
  • Genotype
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Middle Aged
  • Neoplasm Staging
  • Neuroblastoma / genetics*
  • Neuroblastoma / pathology
  • Polymorphism, Single Nucleotide*
  • Risk
  • fas Receptor / genetics*

Substances

  • Fas Ligand Protein
  • fas Receptor

Grants and funding

This work was supported by Program for New Century Excellent Talents in University NCET-10-0388 to Xiaoping Miao. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.