Journal List > Lab Anim Res > v.26(1) > 1053649

Choi, Lee, Jin, and Kim: Inhibitory Effect of Luteolin Liposome Solution by Animal Model for Atopic Dermatitis in NC/Nga Mice

Abstract

Atopic dermatitis is a common chronic inflammatory skin disease, associated with marked inflammatory cells (of mast cells and eosinophils) and severe itching, which leads to clinical problems in the pediatric population. This study was designed to investigate the inhibitory effects of luteolin liposome solution, that is entrapped the hydrophobic luteolin (one of the flavonoids) into ethosome to improve its stability, by using hapten-induced atopic dermatitis animal model (NC/Nga mice). The luteolin liposome treated mice showed anti-inflammatory effect as evidenced by the lowering of erythema and edema in clinical observation, reduction of inflammatory cell infiltration and epidermal thickness in histopathological examination, when compared with TNCB induced controls. Luteolin liposome solution also reduced the serum IgE level which played important roles in the atopic dermatitis model. These results suggest that luteolin liposome solution has some merit in this formulation showing inhibitory effects for the atopic dermatitis.

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Figure 1.
Gross lesions of NC/Nga mouse skin. A: Normal control, B: TNCB induced control, C: Luteolin liposome solution, D: Luteolin.
lar-26-47f1.tif
Figure 2.
Histological observation of NC/Nga mouse skin by H&E staining (×100) (red bar=50 µm). A: Normal control, B: TNCB induced control, C: Luteolin liposome solution, D: Luteolin.
lar-26-47f2.tif
Figure 3.
Histological observation of NC/Nga mouse skin by Toluidine blue staining (×100) (red bar=50 µm). A: Normal control, B: TNCB induced control, C: Luteolin liposome solution, D: Luteolin. There are many mast cells (arrow) in TNCB control (B).
lar-26-47f3.tif
Table 1.
The frequency of scratching in NC/Nga mice
Weeks NC TNCB T1 T2
0 0.8±0.8a 6.0±2.6b 5.2±2.6b 5.2±2.2b
2 0.6±0.5a 4.4±2.1b 2.6±1.5ab 2.4±1.7ab

Unit: times in 30 minutes

NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin

Values with different superscripts (a,b) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test.

Table 2.
Changes inf transepidermal water loss (TEWL) of NC/Nga mice
Weeks NC TNCB T1 T2
0 12.08±2.93a 75.04±13.89b 80.28±15.58b 76.44±27.05b
2 12.34±3.78a 41.68±12.78b 38.44±20.27b 038.90±22.51ab

Unit: g/m²/h NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin Values with different superscripts (a,b) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test

Table 3.
Changes in water capacity of NC/Nga mice by Corneometer
Weeks NC TNCB T1 T2
0 37.74±25.79b 16.86±2.93a 14.01±7.27a 16.74±5.04a
2 30.85±4.32b0 019.06±11.22a 19.86±4.37a 20.23±7.19a

Unit: Arbitrary unit NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin Values with different superscripts (a,b) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test.

Table 4.
Epidermal thickness of NC/Nga mice
Weeks NC TNCB T1 T2
2 27.54±6.02a 105.63±43.37c 34.87±10.91ab 52.74±17.76b

Unit: µm NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin Epidermal thickness was determined by the average of three sites (short, medium, long-size each) in same fields of microscope. Values with different superscripts (a,b,c) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test.

Table 5.
Number of mast cells and ratio of degranulation by Toluidine blue staining
      NC   TNCB   T1     T2
Total No of mast cell   79.2±1 1.5a 176.6±17. 8c 134.0±26.1 b 12 5.3±37.8b
Mean No o of degranulati on .59±8 .6a 0.117±12. 9b 101.6±22.9 b 00 .94±28.4b
Deganulati on/total No.   74.5 5 66.1   75.8     75.2

NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin The number of mast cells was determined by the average of five different fields with an eyepiece of ×100 magnification. Values with different superscripts (a,b,c) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test.

Table 6.
Plasma IgE levels of NC/Nga mice
Weeks NC TNCB T1 T2
2 734.0±364.6a 4,303.3±523.0c 3101.1±780.5b 2,503.2±1,041.5b

Unit: ng/mL NC: Normal control, TNCB: TNCB induced control, T1: Luteolin liposome solution, T2: Luteolin Values with different superscripts (a,b,c) in the same row are significantly different (P<0.05) by ANOVA and Duncan's multiple range test.

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