Low prevalence of BRAF mutations in radiation-induced thyroid tumors in contrast to sporadic papillary carcinomas

Title: Low prevalence of BRAF mutations in radiation-induced thyroid tumors in contrast to sporadic papillary carcinomas
Author: Nikiforova, Marina N / Ciampi, Raffaele / Salvatore, Giuliana / Santoro, Massimo / Gandhi, Manoj / Knauf, Jeffrey A / Thomas, Gerry A / (…) / Nikiforov, Yuri E

Reference: Cancer Letters, 209 (1), p.1-6, Jun 2004

doi: 10.1016/j.canlet.2003.12.004

Keywords: Thyroid cancer; BRAF mutation; RET/PTC Rearrangement; Radiation exposure

Abstract: Point mutations of the BRAF gene have been recently described with high prevalence in papillary thyroid carcinomas. However, this molecular alteration has not been studied in radiation-induced thyroid tumors. We analyzed the prevalence of BRAF point mutations and RET/PTC rearrangements in 55 post-Chernobyl papillary carcinomas, compared with 82 sporadic papillary carcinomas. Radiation-induced tumors demonstrated a low prevalence (4%) of BRAF point mutations and high prevalence (58%) of RET/PTC rearrangements. Sporadic papillary carcinomas revealed a clearly distinct pattern, with 37% of tumors harboring BRAF mutations and 20% RET/PTC rearrangements. These results demonstrate a significant difference in the molecular genetic profile of sporadic and radiation-induced thyroid tumors.

URL:http://www.sciencedirect.com/science/article/pii/S0304383503008334

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