The biology and the genetics of Hurthle cell tumors of the thyroid

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 2012

Autores

Valdemar Maximo (Autor) FMUP; Jorge Lima (Autor) FMUP; Hugo Prazeres (Autor) Outra; Paula Soares (Autor) FMUP; Manuel Sobrinho Simoes (Autor) FMUP

Revista

Título: Endocrine-Related Cancer

Vol. 19

Páginas: R131-R147

ISSN: 1351-0088

Editora: BioScientifica Ltd.

Indexação

ISI Web of Knowledge - 53 Citações

Scopus - 67 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina clínica

Outras Informações

ID Authenticus: P-002-7KM

DOI: 10.1530/erc-11-0354

Abstract (EN): The biology and the genetics of Hurthle cell tumors are reviewed starting from the characterization and differential diagnosis of the numerous benign and malignant, neoplastic and nonneoplastic lesions of the thyroid in which Hurthle cell transformation is frequently observed. The clinicopathologic and molecular evidence obtained from the comparative study of the aforementioned conditions indicate that Hurthle cell appearance represents a phenotype that is superimposed on the genotypic and conventional histopathologic features of the tumors. Hurthle cell tumors differ from their non-Hurthle counterparts regarding the prevalence of large deletions of mitochondrial DNA (mtDNA), mutations of mtDNA genes coding for oxidative phosphorylation (OXPHOS) proteins (namely mutations of complex I subunit genes) and mutations of nuclear genes coding also for mitochondrial OXPHOS proteins. Such mitochondrial alterations lead to energy production defects in Hurthle cell tumors; the increased proliferation of mitochondria may reflect a compensatory mechanism for such defects and is associated with the overexpression of factors involved in mitochondrial biogenesis. The mitochondrial abnormalities are also thought to play a major role in the predisposition for necrosis instead of apoptosis which seems to be blocked in most Hurthle cell tumors. Finally, the results obtained in experimental models using cybrid cell lines and the data obtained from histopathologic and molecular studies of familial Hurthle cell tumors are used, together with the aforementioned genetic and epigenetic alterations, to progress in the understanding of the mechanisms through which mitochondrial abnormalities may be involved in the different steps of thyroid carcinogenesis, from tumor initiation to metastization. Endocrine-Related Cancer (2012) 19 R131-R147

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 17