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Iodine nutritional status is not a direct factor in the prevalence of the BRAFV600E mutation in papillary thyroid cancer

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ARCHIVES OF ENDOCRINOLOGY METABOLISM
卷 67, 期 2, 页码 172-178

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SBEM-SOC BRASIL ENDOCRINOLOGIA & METABOLOGIA
DOI: 10.20945/2359-3997000000530

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Papillary thyroid carcinoma; BRAFV600E; Iodine

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In this study, the relationship between iodine nutritional status and the prevalence of BRAF600E mutation in PTC patients was analyzed. The results showed that iodine intake did not significantly influence the prevalence of BRAFV600E mutation. This study provides preliminary research on the association between dietary iodine intake and BRAFV600E mutation in PTC patients.
Objectives: Papillary thyroid carcinoma (PTC) accounts for approximately 85%-90% of all thyroid cancers. Of the iodine-metabolizing genes, BRAFV600E is a highly specific target for PTC and may have a reciprocal causative relationship with iodide-metabolizing genes. Materials and methods: In this study, we performed a data analysis of selected quantitative studies to determine the relationship between iodine nutritional status and the prevalence of the BRAF600E mutation in patients with PTC. Five studies were selected for meta-analysis based on the selection criteria. Results: A total of 2,068 patients were divided into three groups: low (urinary iodine concentration [UIC] < 100 mu g/L), adequate (UIC 100-200 mu g/L), and high (UIC >= 200 mu g/L). The results were obtained using RevMan software, and the pooled odds ratios (ORs) were calculated using Mantel-Haenszel statistics with a 95% confidence interval (CI). The OR for the prevalence of the BRAFV600E mutation between the high and adequate groups was 1.25 (95% CI 0.64-2.43, p = 0.51), and the OR between the low and adequate groups was 0.98 (95% CI 0.42-2.31, p = 0.96). The BRAFV600E mutation risk did not change significantly at different levels of iodine nutrition (p = 0.33) in statistical analyses. Conclusion: We conducted preliminary research on dietary iodine intake and the BRAFV600E mutation in PTC. The results suggested that abnormal iodine intake might not directly influence the prevalence of the BRAFV600E mutation in these patients. Further research into the associations between dietary iodine intake and the BRAFV600E mutation in PTC, including the underlying mechanisms, is required. Arch Endocrinol Metab. 2023;67(2):172-8

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