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Table 2 The IC50 values of LAS, epicatechin, luteolin-7-O-β-D-glucoside in various antioxidant assays

From: Two phenolic antioxidants in Suoyang enhance viability of •OH-damaged mesenchymal stem cells: comparison and mechanistic chemistry

Assays

LAS, μg/mg

Epicatechin, μg/mg (μM)

Luteolin-7-O-β-D-glucoside, μg/mg (μM)

Trolox, μg/mg (μM)

PTIO• scavenging

93.1 ± 0.6

82.6 ± 2.3b (283.6 ± 7.2)C

205.9 ± 13.2e (459.2 ± 2.9)A

55.5 ± 5.5a (221.1 ± 22.0)B

FRAP

179.1 ± 3.7

11.3 ± 1.0b (38.8 ± 3.4)A

15.6 ± 0.7b (33.9 ± 2.5)A

13.4 ± 1.0b (53.4 ± 4.1)A

DPPH• scavenging

188.5 ± 3.0

2.5 ± 1.8a (8.6 ± 6.2)A

12.8 ± 0.4b (28.6 ± 0.9)A

3.8 ± 0.5b (15.0 ± 2.1)A

ABTS+• scavenging

70.5 ± 0.8

1.5 ± 0.8a (5.3 ± 2.8)A

8.3 ± 0.4b (18.6 ± 0.9)A

5.2 ± 0.4b (20.8 ± 1.5)A

  1. IC50 value is defined as the concentration of 50% effect percentage and expressed as mean ± SD (n = 3). The linear regression was analyzed by Origin 6.0 professional software. Means values with different superscripts (a, b or A, B) in the same row are significantly different (p < 0.05), while with same superscripts are not significantly different (p > 0.05)
  2. FRAP ferric ion reducing antioxidant power, Trolox [(±)-6-hydroxyl-2, 5, 7, 8-tetramethlychromane-2-carboxylic acid] acts as the positive control, LAS lyophilized aqueous extract of Suoyang. The dose response curves were shown in Additional file 2