Publications by authors named "Elen Dias Accordi"

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Familiar Papillary Thyroid Carcinoma in a Large Brazilian Family Is Not Associated with Succinate Dehydrogenase Defects.

Eur Thyroid J 2016 Jul 10;5(2):94-9. Epub 2016 Mar 10.

Group for Advanced Molecular Investigation (NIMA), Graduate Program in Health Sciences (PPGCS), School of Medicine (EM), Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Brazil; Section on Endocrinology and Genetics, Program on Developmental Endocrinology and Genetics (PDEGEN) and Pediatric Endocrinology Inter-Institute Training Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH), Md., USA.

Background: Thyroid cancer is the most common endocrine gland malignancy. Advances in understanding the genetic basis for thyroid cancer revealed the potential involvement of several genes in the formation of thyroid tumors. Mutations in the gene coding for succinate dehydrogenase subtype B (SDHB) have been implicated in papillary thyroid cancer (PTC). Succinate dehydrogenase (SDH) is a heterotetrameric protein composed of four subunits, SDHA, SDHB, SDHC, and SDHD, and participates in both the electron transport chain and the tricarboxylic acid cycle. The aim of the study was to evaluate the association between variants in the SDHA, SDHB, SDHC, and SDHD genes and familiar PTC in a large Brazilian family.

Method: Four patients with PTC, 1 patient with PTC and gastrointestinal stromal tumor (GIST), 1 patient with GIST, and their relatives - several of them with different thyroid problems - from a large Brazilian family were screened for genetic variations of SDHx genes with the use of polymerase chain reaction-single-stranded conformational polymorphism and direct sequencing.

Results: Only one rare variation in SDHA was found in some of the family members, but not segregating with the disease. No other genetic variants of these genes were detected in the family members that presented with PTC and/or GIST.

Conclusion: Familiar PTC and a GIST were not associated with SDHx mutations; additional genetic defects, yet unknown, may be responsible for the development of tumor.
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http://dx.doi.org/10.1159/000444522DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4949364PMC
July 2016