An examination of the cell viability in the presence of MEOA,
EEOA and WEOA in RAW 264.7 cells indicated that the
concentrations of these compounds used in this study did not
affect the viability of theRAW264.7 cells (data not shown). Thus,
the inhibitory effects on NO production are not attributable
to cytotoxic effects. Therefore, EEOA was further studied.
Murata et al. (5) indicated thatPGE2 is a principal mediator of
inflammation in inflammatory diseases. Pong et al. (26) indicated
that ROS induces oxidative damage in biomolecules and causes
atherosclerosis, hypertension, diabetes and cancer. In the present
study, EEOA significantly reduced LPS-stimulated PGE2 and
ROS production in RAW 264.7 cells (Figures 2 and 3).