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inactivating mutations of the MEN1 gene, encoding menin, an intracellular protein that interacts with transcription factors involved in cell cycle regulation and proliferation ( 8 ). Fifteen well-documented cases of parathyroid carcinoma (PC) and one atypical
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hyperparathyroidism (FIHP; CDC73/HRPT2 and GCM2 genes) and, rarely, in multiple endocrine neoplasia type 1 (MEN1, MEN1 gene) and 2A (MEN2A; RET gene) ( 2 , 3 ). MEN1 is a rare disorder characterized by PHPT, pituitary and gastroenteropancreatic
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significant prognostic factors for remission. Surgical outcome in relation to mutated exon is presented in Table 4 . Table 4 Surgical outcomes in the 57 operated patients harboring mutations in different exons of the MEN1 gene ( P < 0.001 for chi
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pituitary (1) . MEN1 is caused by heterozygous germline mutations of the MEN1 gene, and tumours developed by MEN1 patients show loss of the remaining normal copy of the MEN1 gene, a ‘second-hit’, demonstrating the tumour suppressor function of its
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QIAamp DNA FFPE Tissue Kit (QIAGEN). Exon 2–10 of the MEN1 gene, coding region of TP53 and exon 3 of CTNNB1 were amplified and analyzed by Sanger sequencing. The primer sequences of MEN1 were previously reported ( 23 ), while the primer sequences
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the MEN1 gene yielded negative results. The subsequent follow-up was notable for the evidence of gastro–entero–pancreatic NETs, which were initially treated with proton-pump inhibitors and somatostatin analogs, and then successfully by surgery. At
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Inserm/CNRS UMR 1283/8199, Pasteur Institute of Lille, EGID, Lille, France
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Univ. Lille, Inserm, CHU Lille, U1286 – Infinite – Institute for Translational Research in Inflammation, Lille, France
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Introduction Multiple endocrine neoplasia type 1 (MEN1, OMIM 131100) is an autosomal dominant disease due to mutation in the MEN1 gene, characterized by a broad spectrum of clinical manifestations ( 1 ). The classic clinical triad includes
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, while searching for other features of malignancy ( 34 ). Figure 1 Parathyroid tumorigenesis mechanisms via the cyclins pathway. CCND1 gene, encoding cyclin D1, is upregulated in parathyroid adenomas. MEN1 gene inactivation results in a
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Institute of Clinical Endocrinology, Endocrinology Research Center, Moscow, Russian Federation
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the MEN1 gene be performed in all patients with primary hyperparathyroidism under 40 years of age? World Journal of Surgery 2010 34 1294 – 1298 . ( doi:10.1007/s00268-009-0388-5 ) 20058152 10.1007/s00268-009-0388-5 11 Langer P Wild A
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MEN1 gene ( 7 , 15 , 16 ). In 2002, Fritz and co-workers first described an autosomal recessive MEN-like syndrome in the rat. Animals exhibiting the mutant phenotype spontaneously developed multiple neuroendocrine malignancies within the first