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Abstract
Background: To examine the impact of polymorphisms of glucose transporter 1 (GLUT1) gene on the prognosis of patients with stage III non-small cell lung cancer (NSCLC) who received radiotherapy.

Methods: Five single nucleotide polymorphisms (SNPs) (rs4658C>G, rs1385129G>A, rs3820589A>T, rs3806401A>C and rs3806400C>T) in GLUT1 gene were evaluated in 90 patients with pathologically confirmed stage III NSCLC. A total of 21 patients were treated with radiotherapy alone, 25 with sequential chemoradiotherapy, and 44 with concurrent chemoradiotherapy. The association of the genetic variations of five SNPs with overall survival (OS) and progression-free survival (PFS) was analyzed.

Results: Two SNPs (rs1385129 and rs3806401) were significant risk factors for OS. Three SNPs (rs1385129, rs3820589 and rs3806401) were in linkage disequilibrium. In Cox proportional hazard models, GAA haplotype was a good prognostic factor for OS (hazard ratio [HR] = 0.57, 95% confidence interval [CI]: 0.39-0.81, p = 0.002) and PFS (HR = 0.68, 95% CI: 0.47-0.99, p = 0.043), compared to variant haplotypes. The GAA/GAA diplotype was observed in 46.7% of patients; these patients showed significantly better OS (HR = 0.38, 95% CI: 0.22-0.65, p < 0.001) and PFS (HR = 0.51, 95% CI: 0.31-0.85, p = 0.009) compared to those with other diplotypes.

Conclusions: These results suggest that polymorphisms of GLUT1 gene could be used as a prognostic marker for patients with stage III NSCLC treated with radiotherapy.

Affiliations

Min Kyu Kang  1 , Shin Yup Lee  2 , Jin Eun Choi  3   4 , Sun Ah Baek  4 , Sook Kyung Do  3   4 , Jeong Eun Lee  1 , Jongmoo Park  1 , Seung Soo Yoo  2 , Sunha Choi  2 , Kyung Min Shin  5 , Ji Yun Jeong  6 , Jae Yong Park  2   3   4
1 Department of Radiation Oncology, School of Medicine, Kyungpook National University, Daegu, South Korea.
2 Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea.
3 Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu, South Korea.
4 Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, South Korea.
5 Department of Radiology, School of Medicine, Kyungpook National University, Daegu, South Korea.
6 Department of Pathology, School of Medicine, Kyungpook National University, Daegu, South Korea.