Table 1.

Dose-dependent inhibition of neutrophil oxidative burst in the presence of piceatannol. Chemiluminescence, measured in whole blood, was initiated with PMA (0.05 μmol/L), Ca²⁺-ionophore A23187 (1 μmol/L), or opsonized zymosan (0.5 g/L). The incubation of neutrophils with piceatannol was 60 min (PMA, zymosan) or 30 min (A23187), depending on the kinetics of oxidative burst. Mean ± SEM, n = 8, *P ≤ 0.05, **P ≤ 0.01  versus Control.

Piceatannol (µmol/L)	Inhibition of chemiluminescence (% of control)
	PMA	A23187	Zymosan
0.01	93.21 ± 2.64*	96.74 ± 1.41	98.10 ± 1.10
0.1	84.45 ± 1.99**	91.64 ± 1.84**	98.63 ± 1.42
1	41.19 ± 2.19**	73.89 ± 4.39**	93.22 ± 1.98*
10	4.12 ± 0.21**	19.40 ± 3.30**	50.17 ± 1.37**
100	0.25 ± 0.04**	0.07 ± 0.07**	0.26 ± 0.07**