Association of the recurrence and canceration rate of vocal leukoplakia with interleukin-10 promoter variants over a 2-year period

Abstract

Conclusion This study indicates that IL-10 promoter polymorphism variants, smoking, and alcohol consumption increase the risk of recurrence and canceration in vocal leukoplakia.

Objective This prospective, clinical trial was performed to evaluate the association of interleukin (IL)-10 promoter polymorphism variants and canceration and recurrence rates in vocal leukoplakia (a pre-cancerous laryngeal carcinoma lesion) over a 2-year period.

Participants and method Sixty-one post-operative patients with vocal leukoplakia were enrolled in this prospective, observational study and genotyped for the IL-10 promoter gene (IL-10-1082 A/G, -819 T/C and -592 A/C) using pyrosequencing, and responded to a 2-year follow-up survey. Recurrence and canceration rates were used to evaluate the association between the genotype variants and the clinical outcome.

Results There was an increased canceration rate in the variant genotype group compared to that in the normal genotype group in the 2-year follow-up period (18.4% vs 0%, p-value = 0.038). Compared with the non-smoker group, the smoker group had a higher recurrence rate of vocal leukoplakia (29.3% vs 5%, p-value =0.044). Likewise, the recurrence rate in the alcohol consumption group was also higher (30.6% vs 8%, p-value =0.034). The percentage of cancerization in the alcohol consumption group was significantly higher than that in the non-alcohol consumption group (19.4% vs 0%, p-value =0.035).

Keywords:

• Alcohol consumption
• canceration
• genotype variants
• IL-10
• smoking
• recurrence
• vocal leukoplakia

Acknowledgements

This work was supported by the National Natural Science Foundation of China (grant no. 30801283), the Technology Project of Shanghai (grant nos 09QA1401000, 10QA1405900 and 14411961900), and Shanghai’s Health System of Talents Training Plan (grant nos XYQ2011055 and XYQ2011015).

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.