PMID- 10022819 OWN - NLM STAT- MEDLINE DCOM- 19990303 LR - 20190607 IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 18 IP - 6 DP - 1999 Feb 11 TI - Over-representation of a germline RET sequence variant in patients with sporadic medullary thyroid carcinoma and somatic RET codon 918 mutation. PG - 1369-73 AB - The aetiology of sporadic medullary thyroid carcinoma is unknown. About 50% harbour a somatic mutation at codon 918 of RET (M918T). To investigate whether other RET sequence variants may be associated with or predispose to the development of sporadic medullary thyroid carcinoma, we analysed genomic DNA from the germline and corresponding tumour from 50 patients to identify RET sequence variants. In one patient, tumour DNA showed a novel somatic 12 bp in-frame deletion in exon 15. More interestingly, we found that the rare polymorphism at codon 836 (c.2439C > T; S836S) occurred at a significantly higher frequency than that in control individuals without sporadic medullary thyroid carcinoma (Fisher's exact test, P = 0.03). Further, among the nine evaluable cases with germline c.2439C/T, eight also had the somatic M918T mutation in MTC DNA which was more frequent than in patients with the more common c.2439C/C (89% vs 40%, respectively; Fisher's exact test, P = 0.01). These findings suggest that the rare sequence variant at codon 836 may somehow play a role in the genesis of sporadic medullary thyroid carcinoma. FAU - Gimm, O AU - Gimm O AD - Human Cancer Genetics Program, Comprehensive Cancer Center, Ohio State University, Columbus 43210, USA. FAU - Neuberg, D S AU - Neuberg DS FAU - Marsh, D J AU - Marsh DJ FAU - Dahia, P L AU - Dahia PL FAU - Hoang-Vu, C AU - Hoang-Vu C FAU - Raue, F AU - Raue F FAU - Hinze, R AU - Hinze R FAU - Dralle, H AU - Dralle H FAU - Eng, C AU - Eng C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (Codon) RN - 0 (Drosophila Proteins) RN - 0 (Proto-Oncogene Proteins) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-ret) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) RN - EC 2.7.10.1 (Ret protein, Drosophila) SB - IM MH - Carcinoma, Medullary/etiology/*genetics MH - Codon MH - *Drosophila Proteins MH - Genetic Variation MH - *Germ-Line Mutation MH - Humans MH - Multiple Endocrine Neoplasia Type 2a/genetics MH - Point Mutation MH - Proto-Oncogene Proteins/*genetics MH - Proto-Oncogene Proteins c-ret MH - Receptor Protein-Tyrosine Kinases/*genetics MH - Sequence Deletion MH - Thyroid Neoplasms/etiology/*genetics EDAT- 1999/02/18 00:00 MHDA- 1999/02/18 00:01 CRDT- 1999/02/18 00:00 PHST- 1999/02/18 00:00 [pubmed] PHST- 1999/02/18 00:01 [medline] PHST- 1999/02/18 00:00 [entrez] AID - 10.1038/sj.onc.1202418 [doi] PST - ppublish SO - Oncogene. 1999 Feb 11;18(6):1369-73. doi: 10.1038/sj.onc.1202418.