Differential expression of NF-kappaB pathway genes among peripheral T-cell lymphomas.
Leukemia
; 19(12): 2254-63, 2005 Dec.
Article
en En
| MEDLINE
| ID: mdl-16270046
ABSTRACT
Nuclear factor kappa B (NF-kappaB) is one important pathway in T-cell proliferation and survival. In a previously reported microarray study, we found NF-kappaB pathway genes differentially expressed between peripheral (PTCL) and lymphoblastic lymphomas. Here, we investigated the expression of NF-kappaB pathway genes using cDNA microarrays in a group of 62 PTCL and in reactive lymph nodes. We found two different subgroups of PTCL based on the expression of NF-kappaB pathway genes. One-third of PTCL showed clearly reduced expression of NF-kappaB genes, while the other group was characterized by high expression of these genes. This distinction was found among all T-cell lymphoma categories analyzed (PTCL unspecified, angioimmunoblastic, cutaneous and natural killer/T lymphomas) with the exception of anaplastic lymphomas (ALCL), which were characterized by reduced NF-kappaB expression in anaplastic cells. Quantitative RT-PCR and immunohistochemical analysis of NF-kappaB-p65 protein confirmed these differences among PTCL subgroups. Importantly, we found that differentiation between NF-kappaB-positive and -negative PTCL could be of clinical interest. The expression profile associated to reduced expression of NF-kappaB genes was significantly associated with shorter survival of patients and seems to be an independent prognostic factor in a multivariate analysis.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Regulación Neoplásica de la Expresión Génica
/
Linfoma de Células T Periférico
/
FN-kappa B
Tipo de estudio:
Prognostic_studies
Límite:
Adult
/
Aged
/
Aged80
/
Child
/
Humans
/
Middle aged
Idioma:
En
Revista:
Leukemia
Asunto de la revista:
HEMATOLOGIA
/
NEOPLASIAS
Año:
2005
Tipo del documento:
Article
País de afiliación:
España