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Table 2 The effect of the plant extracts (200 μg/ml) on enzyme activities

From: In vitro determination of the anti-aging potential of four southern African medicinal plants

Plant species

Plant part

Extract type

Anti-elastase

Anti-collagenase

Anti-hyaluronidase

Clerodendrum glabrum

roots

MeOH

5.92 ± 4.75

ng

ng

EtOAc

15.30 ± 1.96

31.70 ± 0.54

ng

stems

MeOH

13.35 ± 0.56

68.09 ± 8.57

ng

EtOAc

89.38 ± 3.24

88.64 ± 0.53

8.11 ± 0.95

fruits

MeOH

49.38 ± 3.82

72.54 ± 9.83

0.51 ± 0.72

EtOAc

87.95 ± 0.10

26.29 ± 1.17

2.50 ± 3.53

bark

MeOH

13.52 ± 6.96

58.96 ± 8.65

5.19 ± 1.61

EtOAc

81.46 ± 4.78

81.55 ± 4.03

ng

Peltophorum africanum

leaves

MeOH

55.83 ± 0.04

82.13 ± 3.64

49.32 ± 6.58

EtOAc

80.20 ± 1.02

75.26 ± 7.38

2.69 ± 3.80

seeds

MeOH

85.17 ± 3.20

80.39 ± 9.18

ng

EtOAc

87.09 ± 1.22

77.34 ± 4.45

2.18 ± 0.13

bark

MeOH

69.36 ± 4.33

78.44 ± 3.18

48.46 ± 6.77

EtOAc

86.27 ± 3.63

88.27 ± 1.77

23.24 ± 0.18

stems

MeOH

64.50 ± 3.41

74.14 ± 1.08

0.95 ± 0.76

EtOAc

84.40 ± 3.97

83.25 ± 3.57

13.78 ± 0.28

Psychotria capensis

roots

MeOH

45.90 ± 9.84

59.41 ± 6.73

12.86 ± 3.42

EtOAc

59.60 ± 7.57

28.42 ± 5.23

2.28 ± 3.22

stems

MeOH

42.98 ± 7.29

56.45 ± 9.26

5.00 ± 0.69

EtOAc

56.58 ± 2.11

29.98 ± 0.81

ng

leaves

MeOH

3.28 ± 4.63

ng

52.98 ± 0.66

EtOAc

92.84 ± 1.13

63.07 ± 9.15

3.13 ± 4.42

seeds

MeOH

44.16 ± 2.99

78.36 ± 1.50

ng

EtOAc

70.67 ± 4.80

69.48 ± 5.91

ng

Schotia brachypetala

bark

MeOH

75.32 ± 6.91

77.51 ± 0.28

75.13 ± 7.49

EtOAc

93.73 ± 0.51

87.61 ± 6.72

ng

leaves

MeOH

82.54 ± 3.01

81.35 ± 2.52

20.36 ± 1.92

EtOAc

84.22 ± 4.79

84.70 ± 1.33

6.29 ± 1.17

Controls (10 μg/ml)

     

Elafin

  

93.09 ± 4.10

N/A

N/A

N-Methoxysuccinyl-Ala-Ala-Pro-Chloro

  

91.54 ± 4.14

N/A

N/A

EDTA

  

N/A

83.75 ± 2.89

N/A

Sodium aurothiomalate

  

N/A

N/A

100 ± 0.01

  1. Results are given as percentage inhibition ± Standard Deviation, t.LSD (least significant difference)p=0.05 = 8.7146. Some extracts showed negligible enzyme activity (< 0.01%) and these are represented by ng, N/A represents not applicable.