Polymorphism in PHD1 gene and risk of non-small cell lung cancer in a Chinese population

Hypoxia is a common phenomenon in the development of solid tumors, and hypoxia inducible factor 1 (HIF-1) plays a central role in coordinating the cellular response to hypoxia and in oxygen homeostasis. The prolyl hydrolase 1 (PHD1) is a key adjustment factor that mediates the HIF-1 degradation and relates with the process of tumorigenesis. Thus, polymorphism in PHD1 may affect cellular response to hypoxic conditions and associate with cancer susceptibility. We conducted a case-control study with 406 non-small cell lung cancer cases and 812 healthy controls matched on age and sex to examine the effect of rs10680577 polymorphism within the PHD1 promoter on non-small cell lung cancer (NSCLC) risk in a Chinese population. The genotype of rs10680577 polymorphism was detected by non-denaturing polyacrylamide gel electrophoresis. The ins/del genotype of rs10680577 was associated with significantly increased non-small cell lung cancer risk (ins/del vs. ins/ins: OR = 1.35, 95 % confidence interval (CI) 1.05-1.74, P = 0.020; ins/del vs. ins/ins + del/del: OR = 1.34, 95 % CI = 1.04-1.72, P = 0.022). In addition, the association was more pronounced in the group of > 60 years of age. rs10680577 polymorphism is associated with the risk of non-small cell lung cancer in a Chinese population. This is the first time to show that PHD1 rs10680577 is associated NSCLC risk.