Promotion of cell differentiation, and suppression of cell growth and cyclooxygenase-2 expression by differentiation-inducing agents in human oral squamous carcinoma SCC25 cells.

Abstract:

:We investigated the relationship between cell growth and differentiation and COX-2 expression in oral squamous cell carcinoma (SCC) in vitro and in vivo. Treatment of SCC25 oral squamous carcinoma cells with sodium butyrate (SB) at 0.5-5 mM or all-trans retinoic acid (ATRA) at 3-300 microM inhibited cell growth and induced apoptosis in a dose-dependent manner with concomittant increases in expression of keratin 13, p21WAF1/Cip1 and p27Kip1 and decreases in expression of COX-2. These effects were more pronounced with SB than with ATRA. Injection of SB or ATRA near SCC25-derived tumors in nude mice resulted in inhibition of growth and elevation of differentiation of the tumor accompanied by marked keratinization and increased expression of keratin 13 and decreased expression of COX-2. These results show that the differentiation-inducing agents, particularly SB, suppress growth of oral squamous carcinoma cells through apoptosis and induce cell differentiation possibly through mechanisms involving COX-2, p27Kip1 and/or p21WAF1/Cip1 in vitro and in vivo.

journal_name

Int J Oncol

authors

Kuroda J,Urade M,Kishimoto H,Noguchi K,Hashitani S,Sakurai K,Nishimura N,Hashimoto-Tamaoki T

keywords:

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

361-7

issue

2

eissn

1019-6439

issn

1791-2423

journal_volume

26

pub_type

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