Analysis of rs1048943 in the CYP1A1 gene in laryngeal cancer - a case control study

Background: The CYP1A1 gene is essential in the metabolism of carcinogenic polycyclic aromatic hydrocarbons (PAHs). Numerous studies have investigated the links between the polymorphism Ile462Val rs1048943 A>G and its association with different cancers but the results have been variable. In this study, we studied rs1048943 in Sudanese patients diagnosed with laryngeal cancer. Methods: This is a case-control study of 49 laryngeal cancer cases and 50 healthy controls. Restriction fragment length polymorphisms (RFLP) were used to analyse the fragment region of the CYP1A1 gene that contains rs1048943. Results: The average age of the patients was 51.2 years old and the male to female ratio was 1:1. Well differentiated squamous cell carcinoma constituted most of the histopathological diagnoses. Ile462Val rs1048943 A>G was not found in any of the cases but was found in heterozygous form in four controls (p = 0.1331, OR 0.1044, 95% CI, 0.0054-1.9924). Conclusions: Our study did not show a significant association of CYP1A1 Ile462Val rs1048943 A>G with laryngeal cancer. Future studies may need to test additional single nucleotide polymorphisms (SNPs) in laryngeal cancer tissue samples to identify the effect of those SNPs on laryngeal cancer.