Receptor tyrosine phosphatase, CD45 binds galectin-1 but does not mediate its apoptotic signal in T cell lines.
Immunol Lett
; 82(1-2): 149-54, 2002 Jun 03.
Article
en En
| MEDLINE
| ID: mdl-12008046
ABSTRACT
Galectin-1 (Gal-1) is an endogenous mammalian S-type lectin with highly pleiotropic effect on different tissues. The viability of the lymphoid cells is reduced by gal-1 by triggering apoptosis, however, the mechanism of the gal-1 induced apoptosis is still under investigation. The receptor tyrosine phosphatase, CD45, a heavily glycosylated cell surface molecule binds to gal-1 with high affinity, however, its contribution to the gal-1 induced apoptosis is still controversial. In this study we show that galectin-1 binds to cells deficient for CD45, although CD45 is one of the galectin-1-binding cell surface proteins on T cells. Moreover, the CD45 deficient Jurkat variant, J45.01 responds readily with tyrosine phosphorylation and subsequent apoptosis to galectin-1 treatment in a similar degree as its wild type counterpart, Jurkat does. These results strongly indicate that CD45 is not the receptor via gal-1 mediates the apoptotic signal into the cells as it was suggested in previous studies.
Buscar en Google
Bases de datos:
MEDLINE
Asunto principal:
Linfocitos T
/
Apoptosis
/
Antígenos Comunes de Leucocito
/
Hemaglutininas
Límite:
Humans
Idioma:
En
Revista:
Immunol Lett
Año:
2002
Tipo del documento:
Article
País de afiliación:
Hungria