Additive effects of Cox-1 and Cox-2 inhibition on breast cancer in vitro.
Int J Oncol
; 29(4): 1019-23, 2006 Oct.
Article
em En
| MEDLINE
| ID: mdl-16964399
ABSTRACT
We hypothesized that combined treatment with Cox-1 and Cox-2 specific inhibitiors would exhibit synergistic effects against breast cancer in vitro. Two human breast cancer cell lines (HTB26, MCF-7) were treated with catechin (Cox-1 inhibitor) or NS398 (Cox-2 inhibitor) at 100 microM as both single and combined treatments. Reductions in cell growth were observed in both cell lines at 24 and 72 h in both single and combined treatments (p<0.001). Combined treatment produced a significantly greater inhibition as compared to single agents alone. Upon cell cycle evaluation, Cox-1 and -2 antagonism increased G1 and G2 phase fractions in MCF-7 cells (p<0.001 and p<0.05 respectively). No additive changes were observed when the two agents were combined. An increase in the G2 phase was observed in the HTB26 cells when treated with NS398 alone (p<0.001). However, a decrease in the S-phase was observed when these cells were treated with NS398, as a single agent (p<0.01) or when the two agents were combined (p<0.01). The significant and additive effects exhibited by the combination of Cox-1 and -2 inhibitors and their effects on cell cycle suggest that these agents could become an effective treatment modality for carcinoma of the breast.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Inibidores de Ciclo-Oxigenase
/
Ciclo-Oxigenase 1
/
Inibidores de Ciclo-Oxigenase 2
/
Proteínas de Membrana
Limite:
Female
/
Humans
Idioma:
En
Revista:
Int J Oncol
Assunto da revista:
NEOPLASIAS
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos