No convincing evidence for a role of CD31-CD38 interactions in the pathogenesis of chronic lymphocytic leukemia.
Blood
; 112(3): 840-3, 2008 Aug 01.
Article
en En
| MEDLINE
| ID: mdl-18519815
ABSTRACT
Although CD38, a marker of poor prognosis in chronic lymphocytic leukemia (CLL), is known primarily as an ecto-enzyme, it has also been ascribed a receptor function. Interaction with its proposed ligand CD31 expressed on nurse-like cells would result in proliferative and survival-signals. Yet, in CLL, both homotypic and heterotypic CD31-CD38 interactions are expected to be rather ubiquitous. We analyzed whether CD38-CD31 interactions result in proliferative and antiapoptotic signals. We found a high expression of CD31 on CLL, irrespective of CD38 expression. Coculture of CD38(high) CLL with endothelial cells or CD31 transfected fibroblasts, with or without blocking CD31 or CD38 antibodies, did not result in increased survival or proliferation. Analysis of gene expression of most known regulators of apoptosis revealed no influence of coculture with CD31-expressing feeder cells. In conclusion, our data do not support an important contribution of CD38 triggering by CD31 to the proliferative and antiapoptotic state of the leukemic clone.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Leucemia Linfocítica Crónica de Células B
/
Molécula-1 de Adhesión Celular Endotelial de Plaqueta
/
ADP-Ribosil Ciclasa 1
Tipo de estudio:
Etiology_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Blood
Año:
2008
Tipo del documento:
Article
País de afiliación:
Países Bajos