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A virus causes cancer by inducing massive chromosomal instability through cell fusion.
Duelli, Dominik M; Padilla-Nash, Hesed M; Berman, David; Murphy, Kathleen M; Ried, Thomas; Lazebnik, Yuri.
Afiliación
  • Duelli DM; Cold Spring Harbor Laboratory, One Bungtown Road, Cold Spring Harbor, NY 11724, USA.
Curr Biol ; 17(5): 431-7, 2007 Mar 06.
Article en En | MEDLINE | ID: mdl-17320392
Chromosomal instability (CIN) underlies malignant properties of many solid cancers and their ability to escape therapy, and it might itself cause cancer [1, 2]. CIN is sustained by deficiencies in proteins, such as the tumor suppressor p53 [3-5], that police genome integrity, but the primary cause of CIN in sporadic cancers remains uncertain [6, 7]. The primary suspects are mutations that deregulate telomere maintenance, or mitosis, yet such mutations have not been identified in the majority of sporadic cancers [6]. Alternatively, CIN could be caused by a transient event that destabilizes the genome without permanently affecting mechanisms of mitosis or proliferation [5, 8]. Here, we show that an otherwise harmless virus rapidly causes massive chromosomal instability by fusing cells whose cell cycle is deregulated by oncogenes. This synergy between fusion and oncogenes "randomizes" normal diploid human fibroblasts so extensively that each analyzed cell has a unique karyotype, and some produce aggressive, highly aneuploid, heterogeneous, and transplantable epithelial cancers in mice. Because many viruses are fusogenic, this study suggests that viruses, including those that have not been linked to carcinogenesis, can cause chromosomal instability and, consequently, cancer by fusing cells.
Asunto(s)
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carcinoma / Fusión Celular / Virus del Mono Mason-Pfizer / Inestabilidad Cromosómica / Fibroblastos / Neoplasias Tipo de estudio: Clinical_trials / Etiology_studies Límite: Animals / Female / Humans Idioma: En Revista: Curr Biol Asunto de la revista: BIOLOGIA Año: 2007 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carcinoma / Fusión Celular / Virus del Mono Mason-Pfizer / Inestabilidad Cromosómica / Fibroblastos / Neoplasias Tipo de estudio: Clinical_trials / Etiology_studies Límite: Animals / Female / Humans Idioma: En Revista: Curr Biol Asunto de la revista: BIOLOGIA Año: 2007 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido