alexa RET genetic screening in patients with medullary thyroid cancer: the Moroccan experience.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Thyroid Disorders & Therapy

Author(s): Abdelhakim A, Barlier A, Kebbou M, Benabdeljalil N, Timinouni M, , Abdelhakim A, Barlier A, Kebbou M, Benabdeljalil N, Timinouni M,

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Abstract BACKGROUND: Germline RET gene mutations are well known to be the genetic causes of multiple endocrine neoplasia type 2 (MEN2) and may be identified by genetic screening. AIM: The purpose of the present study was to screen nine MTC patients for RET sequence changes. MATERIALS AND METHODS: In this study, our sample was composed of 30 individuals: 9 index patients with medullary thyroid carcinoma (MTC) corresponding either to 3 subjects with clinical evidence of MEN2, 6 with apparently sporadic MTC (sMTC), and 21 relatives have been investigated for RET mutations. After DNA extraction from peripheral blood leukocytes, RET exons 8, 10, 11, 13-16 and exon/intron boundaries were analyzed by direct PCR sequencing. RESULTS: Three different known RET germline mutations in exon 11 (codon 634), p.Cys634Arg (c1900 T-->C) (de novo case), p.Cys634Phe (c1901 G-->T), p.Cys634Trp (c1902 C-->G), were detected in three individuals with MEN2 phenotype. Of the 21 relatives, 2 cases presented mutation. Among the six probands with sMTC, none was found to carry mutation. There was no difference between RET polymorphisms detected among both MEN2 and sMTC patients. CONCLUSIONS: These preliminary data suggest that the RET mutation spectra observed in Moroccan patients with MEN2 are similar to those previously reported in other countries. This article was published in J Cancer Res Ther and referenced in Journal of Thyroid Disorders & Therapy

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