Characterization and regulation of the expression of scyllatoxin (Leiurotoxin I) receptors in the human neuroblastoma cell line NB-OK 1.
FEBS Lett
; 285(2): 271-4, 1991 Jul 22.
Article
en En
| MEDLINE
| ID: mdl-1855593
125I-[Tyr2]scyllatoxin allowed to label a single class of high-affinity receptors in membranes from the human neuroblastoma cell line NB-OK 1. The Kd of these receptors was 60 pM for scyllatoxin (Leiurotoxin I) and 20 pM for apamin and the Bmax was low (3.8 fmol/mg membrane protein). K+ increased toxin binding at low concentrations but exerted opposite effects at high concentrations. Ca2+, guanidinium and Na+ exerted only inhibitory effects on binding. Scyllatoxin binding sites were overexpressed 2.5-fold after a 24-h cell pretreatment with 2 mM butyrate. This effect was suppressed by cycloheximide.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Venenos de Escorpión
/
Canales de Potasio
/
Membrana Celular
/
Regulación de la Expresión Génica
/
Receptores Colinérgicos
Límite:
Humans
Idioma:
En
Revista:
FEBS Lett
Año:
1991
Tipo del documento:
Article
País de afiliación:
Bélgica
Pais de publicación:
Reino Unido