title: Predominant expression of mutated allele of the succunate dehydrogenase D (SDHD) gene in the SDHD-related paragangliomas.
abstract: Recent studies indicate that succinate dehydrogenase (SDH) genes B, C, or D are, at least partly, involved in the pathogenesis of pheochromocytoma or paraganglioma. Of these three genes, the SDHD gene mutation is most closely related with paragangliomas of the neck. Here we describe a case of an SDHD-related paraganglioma, in which we studied the molecular characteristics of an SDHD mutation to evaluate the involvement of SDHD in neck paragangliomas. Genetic testing revealed a heterozygous G106D mutation in the SDHD gene. In the tumor tissue, loss of heterozygosity was demonstrated by real time polymerase chain reaction (PCR). In the present case of SDHD mutated paragangliomas, wild type SDHD gene expression was markedly reduced possibly due to loss of heterozygosity not due to imprinting of SDHD gene in the tumors.
authors: Department of Internal Medicine, National Hospital Organization Sendai Medical Center, Sendai, Japan.
authors: Rika
authors: R
authors: Yamashita
authors: Takeshi
authors: T
authors: Usui
authors: Sho
authors: S
authors: Hashimoto
authors: Hiroyoshi
authors: H
authors: Suzuki
authors: Michinori
authors: M
authors: Takahashi
authors: Kenji
authors: K
authors: Honkura
authors: Kazutsugu
authors: K
authors: Iwamoto
authors: Eiken
authors: E
authors: Kodama
authors: Tetsuya
authors: T
authors: Tagami
authors: Mitsuhide
authors: M
authors: Naruse
authors: Akira
authors: A
authors: Shimatsu
authors: Kazuro
authors: K
authors: Kaise
mesh_terms: D000328:Adult; D000483:Alleles; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D005799:Genes, Dominant; D006258:Head and Neck Neoplasms / Q000235:genetics*; D006801:Humans; D019656:Loss of Heterozygosity; D009154:Mutation / Q000502:physiology; D010235:Paraganglioma / Q000235:genetics*; D012186:Retroperitoneal Neoplasms / Q000235:genetics*; D013385:Succinate Dehydrogenase / Q000235:genetics*; D015854:Up-Regulation / Q000235:genetics
chemical_list: C491545:SDHD protein, human; D013385:Succinate Dehydrogenase