Neu differentiation factor induces ErbB2 down-regulation and apoptosis of ErbB2-overexpressing breast tumor cells.
Cancer Res
; 57(17): 3804-11, 1997 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-9288791
ABSTRACT
Neu differentiation factor (NDF), a member of the epidermal growth factor (EGF)-related peptide family, activates ErbB2 via heterodimerization with the NDF receptors ErbB3 and ErbB4. In a similar fashion, EGF receptor (EGFR) agonists induce heterodimers of EGFR and ErbB2. In this paper, we show that the ErbB2-overexpressing breast tumor cells SKBR3, AU565, and MDA-MB453 are growth inhibited by NDF. Cells with elevated levels of ErbB2 but little or no NDF receptors (SKOV3 and MDA-MB361) or cells with low levels of ErbB2 (T47D and MCF7) are not growth inhibited. None of the EGFR agonists tested (EGF, beta-cellulin, or heparin-binding EGF) inhibited growth of ErbB2-overexpressing cells. These results suggest that formation of an ErbB2/NDF receptor heterodimer, but not of an ErbB2/EGFR heterodimer, promotes growth inhibition. In addition, NDF caused a down-regulation of ErbB2 but not of ErbB3. The mechanism underlying the inhibitory effect was examined further in SKBR3 cells, which are 95% growth inhibited by NDF. A G2-M arrest is seen 24 h after NDF treatment, and increased apoptosis is detectable from day 2 onward. The results demonstrate for the first time that NDF induces apoptosis of tumor cells overexpressing ErbB2.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Glicoproteínas
/
Apoptose
/
Genes erbB-2
/
Receptores ErbB
/
Antineoplásicos
Limite:
Female
/
Humans
Idioma:
En
Revista:
Cancer Res
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
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