Assessment of Antioxidant Activity of Spray Dried Extracts of Psidium guajava Leaves by DPPH and Chemiluminescence Inhibition in Human Neutrophils

Table 7

Inhibitory effect of the concentrated extract and spray dried extracts of Psidium guajava on CL_lum produced by neutrophils stimulated with PMA.

Conc.  (µg/mL)^a	Percentage inhibition (%)^b
	Conc. Ext.	MA 80	MDEA 80	βCD 80
1.25	22.40 (10.77)	26.46 (1.56)	26.36 (4.73)	27.98 (4.92)
2.5	35.23 (6.69)	32.0 (6.79)	37.54 (7.89)	34.6 (8.60)
5.0	48.25 (5.22)	51.52 (8.68)	50.72 (9.63)	47.62 (9.11)
25.0	74.37 (4.02)	77.4 (8.55)	77.27 (8.40)	77.29 (10.0)
50.0	86.39 (3.02)	87.56 (5.99)	88.76 (5.56)	88.6 (7.95)
𝐈𝐂𝟓𝟎	6.03 (1.77)	5.54 (2.24)	5.42 (2.85)	6.50 (3.60)
𝐧	3	3	3	3
Quercetin 𝐈𝐂𝟓𝟎	1.67 (1.57)

aFinal concentration of the concentrated extract and spray dried product evaluated; ^bpercentage inhibition of CL_lum produced by neutrophils stimulated with PMA.
Values are presented as the mean (standard deviation).
𝐈𝐂_𝟓𝟎: sample concentration that promotes 50% inhibition of chemiluminescence.
𝐧: number of independent experiments performed in duplicate.
IC₅₀: 𝑃=0.08 (no statistically significant difference was determined by Dunn’s posttest).