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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 1992 Oct;83(10):1057–1062. doi: 10.1111/j.1349-7006.1992.tb02722.x

ras Mutations in Endocrine Tumors: Mutation Detection by Polymerase Chain Reaction‐Single Strand Conformation Polymorphism

Katsuhiko Yoshimoto 1, Hiroyuki Iwahana 1, Ayumi Fukuda 1, Toshiaki Sano 2, Kiyonori Katsuragi 4, Moritoshi Kinoshita 4, Shiro Saito 3, Mitsuo Itakura 1,✉
PMCID: PMC5918679  PMID: 1452458

Abstract

To elucidate the molecular basis for endocrine tumorigenesis, ras mutations in human endocrine tumors were analyzed using polymerase chain reaction‐single strand conformation polymorphism (PCR‐SSCP) analysis. Mutations of the H‐, K‐, N‐ras genes were examined in genomic DNAs from 169 successfully amplified primary endocrine tumors out of 189 samples. Four out of 24 thyroid follicular adenomas analyzed contained mutated N‐ras codon 61, and one contained the mutated H‐ras codon 61. One of the 19 pheochromocytomas revealed mutation of the H‐ras codon 13. No mutations of the ras gene were detected in pituitary adenomas, parathyroid tumors, thyroid cancers, endocrine pancreatic tumors, and adrenocortical tumors. Based on these findings we conclude that activation of the ras gene may play a role in the tumorigenesis of a limited number of thyroid follicular adenomas and pheochromocytomas, and that mutation of the ras gene is not frequent in other human endocrine tumors.

Keywords: ras Gene, Missense mutation, Thyroid follicular adenoma, Pheochromocytoma

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