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Fatty Acid Synthesis Pathway Genetic Variants and Clinical Outcome of Non-Small Cell Lung Cancer Patients after Surgery

  • Jin, Xin (Deparment of Pharmacy, Xijing Hospital, Fourth Military Medical University) ;
  • Zhang, Ke-Jin (Division of Population Science, Department of Medical Oncology, Kimmel Cancer Center, Thomas Jefferson University) ;
  • Guo, Xu (State Key Laboratory of Cancer Biology, Cell Engineering Research Center & Department of Cell Biology, Fourth Military Medical University) ;
  • Myers, Ronald (Division of Population Science, Department of Medical Oncology, Kimmel Cancer Center, Thomas Jefferson University) ;
  • Ye, Zhong (Division of Population Science, Department of Medical Oncology, Kimmel Cancer Center, Thomas Jefferson University) ;
  • Zhang, Zhi-Pei (Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University) ;
  • Li, Xiao-Fei (Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University) ;
  • Yang, Hu-Shan (Division of Population Science, Department of Medical Oncology, Kimmel Cancer Center, Thomas Jefferson University) ;
  • Xing, Jin-Liang (State Key Laboratory of Cancer Biology, Cell Engineering Research Center & Department of Cell Biology, Fourth Military Medical University)
  • Published : 2014.09.15

Abstract

Over-expression of de novo lipogenesis (DNL) genes is associated with the prognosis of various types of cancers. However, the effects of single nucleotide polymorphisms (SNPs) in these genes on recurrence and survival of non-small cell lung cancer (NSCLC) patients after surgery are still unknown. In this study, a total of 500 NSCLC patients who underwent surgery treatment were included. Eight SNPs in 3 genes (ACACA, FASN and ACLY) of the DNL pathway were examined using the Sequenom iPLEX genotyping system. Multivariate Cox proportional hazards regression and Kaplan-Meier curves were used to analyze the association of SNPs with patient survival and tumour recurrence. We found that two SNPs in the FASN gene were significantly associated with the recurrence of NSCLC. SNP rs4246444 had a significant association with lung cancer recurrence under additive model (hazard ratio [HR], 0.82; 95% confidence interval [95%CI], 0.67-1.00; p=0.05). Under the dominant model, rs4485435 exhibited a significant association with recurrence (HR, 0.75; 95%CI, 0.56-1.01; p=0.05). Additionally, SNP rs9912300 in ACLY gene was significantly associated with overall survival in lung cancer patients (HR, 1.41; 95%CI, 1.02-1.94, p=0.04) under the dominant model. Further cumulative effect analysis showed moderate dose-dependent effects of unfavorable SNPs on both survival and recurrence. Our data suggest that the SNPs in DNL genes may serve as independent prognostic markers for NSCLC patients after surgery.

Keywords

De novo lipogenesis;FASN;non-small cell lung cancer;prognosis;single nucleotide polymorphisms

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