The action mechanisms of unclassical NF-kappaB activity and TRAF3 expression in Hodgkin's lymphoma cells / 中华血液学杂志
Chinese Journal of Hematology
;
(12): 678-682, 2009.
Article
Dans Chinois
| WPRIM
| ID: wpr-283917
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the function of unclassical NF-kappaB signaling pathway and TNF associated-factor (TRAF)-3 in Hodgkin's lymphoma (HL) cells, and explore a reasonable explanation for alternative NF-kappaB signaling pathway activation in HL cells.</p><p><b>METHODS</b>The intranuclear NF-kappaB activity in L428 and KM-H2 cells was examined by electrophoretic mobility shift assay (EMSA). The NF-kappaB DNA complex in L428 cell nuclear extracts was further quantified by an ELISA-based NF-kappaB family transcription factor activity assay. The expression of other NF-kappaB family members in the cytoplasm, and the TRAF3 expression were detected by Western blot analysis. The effects of TRAF3 on the unclassical NF-kappaB signaling pathway in L428 cells were studied by transient expression of TRAF3.</p><p><b>RESULTS</b>The NF-kappaB signaling pathway activity persistently remained in L428 and KM-H2 cells. Both classical and unclassical NF-kappaB activity in L428 cells was highly expressed. There were enhanced p52 protein accumulation and RelB expression and a very weak expression of TRAF3 in both L428 and KM-H2 cells. Transient transfection of TRAF3-expression vector increased the TRAF3 expression and blocked the p100 processing and p52 protein accumulation in both cells.</p><p><b>CONCLUSION</b>The classical as well as the unclassical NF-kappaB activities characterized by p100 processing and p52-RelB nuclear localization are persistently present in HL cells. Lack of the TRAF3 expression might be one of the reasons for the aberrant expression of the unclassical NF-kappaB activity.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Anatomopathologie
/
Maladie de Hodgkin
/
Cellules cancéreuses en culture
/
Transduction du signal
/
Facteur de transcription NF-kappa B
/
Facteur-3 associé aux récepteurs de TNF
/
Génétique
/
Métabolisme
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Chinese Journal of Hematology
Année:
2009
Type:
Article
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