A20 (TNFAIP3) genetic alterations in EBV-associated AIDS-related lymphoma.
Blood
; 117(18): 4852-4, 2011 May 05.
Article
em En
| MEDLINE
| ID: mdl-21406721
ABSTRACT
A20, a negative regulator of NF-κB, has been implicated as a tumor suppressor gene in multiple types of B-cell lymphoma. AIDS-related lymphomas (ARLs) are high-grade B-cell lymphomas that are frequently associated with EBV infection. We examined a panel of ARLs for A20 alterations. FISH showed A20 deletion in 6 of 33 cases (18%). A20 mutations were found in 3 of 19 cases (16%), including 2 cases with deletions of the comple-mentary allele. Immunohistochemistry showed the absence of A20 protein in 7 of 55 samples (13%). In contrast to reports in Hodgkin lymphoma in which EBV infection and A20 alteration are mutually exclusive, A20 inactivation was observed in both EBV(+) and EBV(-) cases. The EBV latent membrane protein 1, which activates NF-κB, was not expressed in 12 of 13 cases with A20 loss. In ARLs loss of A20 may be an alternative mechanism of NF-κB activation in the absence of latent membrane protein 1 expression.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Proteínas Nucleares
/
Linfoma Relacionado a AIDS
/
Infecções por Vírus Epstein-Barr
/
Peptídeos e Proteínas de Sinalização Intracelular
/
Mutação
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Blood
Ano de publicação:
2011
Tipo de documento:
Article