Genetic polymorphism contributes to 131I radiotherapy-induced toxicities in patients with differentiated thyroid cancer

Pharmacogenomics. 2018 Nov;19(17):1335-1344. doi: 10.2217/pgs-2018-0070. Epub 2018 Oct 16.

Abstract

Aim: To investigate the association between SNPs in DNA damage response pathways and toxicities following 131I radiotherapy of differentiated thyroid cancer (DTC). Materials & methods: We identified 22 functional SNPs of genes in DNA damage response pathways. MassArray was used to sequence SNP genotypes in 203 DTC patients. Hardy-Weinberg equilibrium and the associations between the two alleles of each SNP and toxicity reactions were evaluated using χ2 analysis.

Results: Ataxia-telangiectasia mutated (ATM) rs620815 T-allele carriers were at increased risk of 131I radiation-induced gastrointestinal reaction compared with C allele carriers. TNFα rs1800629 GA genotype may increase the incidence of neck pain compared with GG genotype. Furthermore, TNFα rs1800629, ATM rs11212570, NF-κβ rs230493, and TGF-β rs1800469, rs2241716 were associated with throat pain following 131I radiotherapy.

Conclusion: The identified SNPs might serve as novel biomarkers for DTC treated with 131I radiotherapy.

Keywords: 131I radiotherapy; SNPs; toxicity reactions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Ataxia Telangiectasia Mutated Proteins / genetics
  • Female
  • Genotype
  • Heterozygote
  • Humans
  • Iodine Radioisotopes / adverse effects*
  • Male
  • Middle Aged
  • Polymorphism, Single Nucleotide / genetics*
  • Radiation Injuries / genetics*
  • Thyroid Neoplasms / genetics*
  • Thyroid Neoplasms / radiotherapy

Substances

  • Iodine Radioisotopes
  • Ataxia Telangiectasia Mutated Proteins