A novel SDHD mutation associated with neck paraganglioma

• Published in: Acta oto-laryngologica Vol. 131; no. 10; pp. 1110 - 1116
• Main Authors: Reboll, Rosa, Martínez-Leon, Juan, Zapater, Enrique, Juez, Marina, Garcia-Planells, Javier, Martinez-Cadenas, Conrado, Basterra, Jorge
• Format: Journal Article
• Language: English
• Published: Stockholm Informa Healthcare 01-10-2011; Taylor & Francis; Informa
• Subjects: Adult; Base Sequence; Biological and medical sciences; DNA Mutational Analysis; familial paraganglioma; Female; Germ-line mutation; head and neck neoplasms; Head and Neck Neoplasms - genetics; Humans; Male; Medical sciences; Molecular Sequence Data; Neurology; Otorhinolaryngology. Stomatology; Paraganglioma, Extra-Adrenal - genetics; Succinate Dehydrogenase - genetics; Tumors of the nervous system. Phacomatoses; head and neck neoplasms; Germ-line mutation; Nervous system diseases; Diseases of the autonomic nervous system; Paraganglioma; Head and neck; familial paraganglioma; Tumor; ENT; Neck; Mutation
• ISSN: 0001-6489; 1651-2251
• DOI: 10.3109/00016489.2011.587201

Abstract
The aim of this study was to describe a previously unreported mutation in the SDHD gene, which has been linked to familial paraganglioma. Clinical data were collected from all members of the family, which had four siblings affected with paraganglioma. For the index patient, genomic DNA extraction from whole blood was performed using the High Pure PCR Template Preparation kit. The nucleotide sequence in the index patient revealed a deletion in the SDHD gene, c.165_169+14del. The loss of nucleotides in the DNA led to production of an anomalous protein. RNA analysis showed the absence of exon 2 in the sequence that corresponded to the mRNA from the index case. Genetic testing of this deletion was extended to the symptomatic and asymptomatic brothers and sisters of the index patient and other family members at risk. The deletion was detected in both symptomatic brothers, in accordance with their phenotype, but not in the asymptomatic sister. In the other asymptomatic brother (II.7) the deletion was detected and magnetic resonance angiography revealed the vascular characteristics of two tumors in both carotid bifurcations. Thus, we report a novel punctual mutation in the SDHD gene, which is related to familial paraganglioma: the deletion was c.165_169 + 14del.