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. 2011;66(7):1203-8.
doi: 10.1590/s1807-59322011000700014.

Interleukin-10 but not interleukin-18 may be associated with the immune response against well-differentiated thyroid cancer

Lucas Leite Cunha  1 , Alfio Jose Tincani, Ligia Vera Montalli da Assumpção, Fernando Augusto Soares, José Vassallo, Laura Sterian Ward
Affiliations

Interleukin-10 but not interleukin-18 may be associated with the immune response against well-differentiated thyroid cancer

Lucas Leite Cunha et al. Clinics (Sao Paulo). 2011.

Abstract

Objectives: The aim of this study was to investigate the role of the interleukin-18 +105A/C and interleukin-10 -1082A/G germline polymorphisms in the development and outcome of differentiated thyroid carcinoma associated or not with concurrent thyroiditis.

Methods: We studied 346 patients with differentiated thyroid carcinomas, comprising 292 papillary carcinomas and 54 follicular carcinomas, who were followed up for 12-298 months (mean 76.10 ± 68.23 months) according to a standard protocol. We genotyped 200 patients and 144 control individuals for the interleukin-18 +105A/C polymorphism, and we genotyped 183 patients and 137 controls for the interleukin-10 -1082A/G polymorphism.

Results: Interleukin-18 polymorphisms were not associated with chronic lymphocytic thyroiditis or any clinical or pathological feature of tumor aggressiveness. However, there was an association between the presence of interleukin-10 variants and chronic lymphocytic thyroiditis. Chronic lymphocytic thyroiditis was present in 21.74% of differentiated thyroid carcinoma patients, most frequently affecting women previously diagnosed with Hashimoto's thyroiditis who had received a lower 131I cumulative dose and did not present lymph node metastases.

Conclusions: We conclude that the inheritance of a G allele at the interleukin-10 -1082A/G polymorphism may favor a concurrent thyroid autoimmunity in differentiated thyroid carcinoma patients, and this autoimmunity may favor a better prognosis for these patients.

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