Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/52333
Título: Dual role of LOH at MMR loci in hereditary non-polyposis colorectal cancer?
Autores/as: Sanchez De Abajo, A. 
De La Hoya, M.
Van Puijenbroek, M.
Godino, J.
Díaz-Rubio, E.
Morreau, H.
Caldes, T.
Clasificación UNESCO: 32 Ciencias médicas
320713 Oncología
Palabras clave: LOH
HNPCC
MMR
Fecha de publicación: 2006
Publicación seriada: Oncogene 
Resumen: hMLH1 and hMSH2 can be considered tumor suppressor genes, as both alleles must be inactivated in order to lose the mismatch repair (MMR) function. In this regard, it has been proposed that LOH at MMR loci is a common Knudson's second-hit mechanism in HNPCC patients. However, experimental evidence supporting this view is scarcely found in the literature. We have performed a comprehensive analysis of LOH in 45 HNPCC tumors carrying a germline alteration in MMR loci. Overall, we have detected LOH at MMR loci in 56% of the cases. However, up to 40% of the LOH events targeted the mutant allele, arguing against a second-hit role in these tumors. Interestingly, the age at diagnosis was significantly older in these patients. To explain this and previous data, we propose a dual role for LOH at MMR loci in HNPCC.
URI: http://hdl.handle.net/10553/52333
ISSN: 0950-9232
DOI: 10.1038/sj.onc.1209233
Fuente: Oncogene[ISSN 0950-9232],v. 25, p. 2124-2130 (Marzo 2006)
Colección:Artículos
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