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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 1998 Jun;89(6):634–640. doi: 10.1111/j.1349-7006.1998.tb03265.x

Alterations of RET, Oncogene in Human Adrenal Tumors

Shiu‐Ru Lin 2,✉, Yuan‐Chieh Yang 2, Juei‐Hsiung Tsai 1, Chin‐Hsun Hsu 2
PMCID: PMC5921876  PMID: 9703361

Abstract

Previous studies have revealed specific activations of the RET oncogene in multiple endocrine neoplasia type 2 (MEN 2) and thyroid tumors. To understand the role of the RET proto‐oncogene activation in sporadic adrenal tumors, we analyzed the alterations of the RET proto‐oncogene in the cysteine‐rich extracellular domain (exons 6 and 10), the terminal region of the extracellular domain and transmembrane domain (exon 11) and the tyrosine kinase domain (exons 12–17) in 35 cases of adrenal tumors (including 18 Conn's syndrome, 3 Cushing's syndrome, 2 non‐functional adrenocortical tumor and 12 pheochromocytomas by polymerase chain reaction‐single strand conformational polymorphism and sequencing methods. One case with pheochromocytoma and one with Conn's syndrome had point mutation. We also detected the rearrangement of the RET gene by reverse transcription‐polymerase chain reaction and Southern hybridization. One case with Conn's syndrome and one with Cushing's syndrome were found to harbor RET/PTC1 (RET tyrosine kinase domain rearranged with H4 gene). The above results indicate that RET protooncogene mutations and RET/PTC1 are involved in the pathogenesis of sporadic adrenal tumors. Mutations at codon 634 of the RET gene were also found in adrenal tumors. This suggests that the RET oncogene may also play a role in the tumorigenesis of adrenal tumors, and this possibility requires further investigation.

Keywords: key words, RET oncogene, Adrenal tumors

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