highly significantP < 0.01
There was either a significant decrease in the nitrite production of group treated with 12.5 μ M cinnamic aldehyde ( P < 0.05), or very or highly significant decrease of groups treated, respectively, with 25 or 50 μ M of cinnamic aldehyde when compared with the LPS-alone group ( P < 0.01 or P < 0.001).