Phosphatidylinositol turnover is not a general regulator of neuroblastoma cell differentiation: comparison between two differentiating agents, retinoic acid and gamma-interferon.
FEBS Lett
; 243(2): 285-8, 1989 Jan 30.
Article
em En
| MEDLINE
| ID: mdl-2492954
ABSTRACT
The turnover of phosphatidylinositol (PI) is believed to constitute a crucial step in the signaling pathways for stimulation of cells by a variety of bioactive substances, including differentiating agents; however decisive evidence for the idea has not been obtained. In the present paper, we investigated the involvement of PI turnover in cell differentiation using a human neuroblastoma cell line, LAN-1, which can be induced to differentiate along the neuronal pathway by both retinoic acid (RA) and gamma-interferon (gamma-IFN). Analysis of labelled phosphatidylinositol metabolites from prelabelled cells indicated a rapid decrease of inositol 1,4,5-trisphosphate and 1,2-diacylglycerol within 1 min of induction of LAN-1 cell differentiation by RA, while no changes were observed in gamma-IFN-treated cells. These findings indicate the occurrence of decreased inositol phospholipid turnover in RA-treated LAN-1 cells and suggest that phosphoinositide-derived metabolites may not constitute general regulators of cellular differentiation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fosfatidilinositóis
/
Tretinoína
/
Diferenciação Celular
/
Interferon gama
Limite:
Humans
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
1989
Tipo de documento:
Article
País de afiliação:
Itália