Table 4. Inhibition effect on the xanthine oxidase of extracts from each part of Akebia quinata

Samples¹⁾	Xanthine oxidase inhibition (%)					IC₅₀ values (μg/mL)
Samples¹⁾	62.5 μg/mL	125 μg/mL	250 μg/mL	500 μg/mL	1,000 μg/mL	IC₅₀ values (μg/mL)
AFW	29.67±0.21^3)e4)	33.25±0.20^e	37.62±0.33^e	43.04±0.15^f	50.82±0.40^f	757.03±4.64^a
ALW	35.74±0.11^c	42.93±0.09^b	46.06±0.27^b	51.12±0.23^d	60.64±0.37^d	371.62±2.06^c
ASW	33.16±0.31^d	38.93±0.11^d	45.41±0.16^c	51.71±0.26^c	58.94±0.30^e	375.95±2.27^d
AFE	29.52±0.27^e	32.46±0.42^f	36.61±0.31^f	43.97±0.25^e	51.31±0.19^f	754.18±5.25^ab
ALE	37.19±0.45^b	40.24±0.33^c	45.81±0.22^bc	51.65±0.19^c	68.38±0.21^b	372.04±2.23^cd
ASE	35.69±0.23^c	40.32±0.13^c	43.36±0.11^d	52.46±0.25^b	64.85±0.39^c	374.54±1.94^cd
Ascorbic acid²⁾	59.74±0.27^a	61.59±0.43^a	68.12±0.35^a	80.81±0.20^a	88.15±0.32^a	52.28±0.30^e

AFW, extracts from Akebia quinata fruit by hot-water; ALW, extracts from Akebia quinata leaf by hot-water; ASW, extracts from Akebia quinata stem by hot-water; AFE, extracts from Akebia quinata fruit by 70% ethanol; ALE, extracts from Akebia quinata leaf by 70% ethanol; ASE, extracts from Akebia quinata stem by 70% ethanol.
Ascorbic acid was used as a positive control substance.
All values are mean±SD (n=5).
Means with different superscript letters (^a-f) in the same column are significantly different at p<0.05 by Duncan’s multiple range test (a>b>c>d>e>f).