• Toxicological Research
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• 제22권4호
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• pp.357-364
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• 2006

This study was undertaken to develop a reliable mice model demonstrating similar immunologic phenomena as human atopic dermatitis characterized with predominance of type-2 immune response. BALB/C mice and NC/Nga mice were sensitized twice with $100{\mu}l$ of 1% 2,4-dinitrochlorobenzene (DNCB) or vehicle (acetone : olive oil=4:1 mixture) in a week and challenged twice with $100{\mu}l$ of 0.2% DNCB or the vehicle at the following week. Mice were sacrificed at 19 days following the second DNCB or vehicle challenge for NC/Nga mice and at 28 days following the second DNCB or vehicle challenge for BALB/c mice. Upregulation of plasma 1gE, a hallmark of atopic dermatitis occurrence, was evident in the plasma obtained 4 day after the second DNCB challenge from BALB/c mice (approximately 4-fold) and NC/Nga mice (approximately 6-fold) treated with DNCB in comparison with that of the vehicle treated-control mice, and remain higher $3{\sim}4$ week after the second challenge. Ratio of plasma IgG1 versus IgG2a concentration was significantly higher in the mice treated with DNCB than the control mice, which also implies the skewed type-2 reactivity in vivo. Ratio of interleukin-4 versus interferon gamma produced in the splenic T cell culture supernatants was approximately 3-fold higher in the both strains of mice treated with DNCB than their control mice, respectively. The DNCB-treated mice demonstrated atopic dermatitis-like skin legions characterized with erythma, scaling, and hemorrhage, which was not observed with the control mice. Scratching on face or dorsal area was significantly more frequent (approximately 25-fold) in the DNCB-treated mice than the control at next day of the second DNCB challenge, and scratching frequency remains higher (approximately 4-fold) in the mice treated with DNCB than the control at 14 day following the second DNCB challenge. Overall, the mice model developed through sensitization and challenge with DNCB may be useful for research on atopic dermatitis and development of treatment materials for atopic dermatitis.

• 대한한의학방제학회지
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• 제22권1호
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• pp.141-150
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• 2014

Objectives : The purpose of this study was to investigate the effects of Polygonum tinctoria Niram(PTN) on atopic dermatitis(AD) in hairless mice induced by 2,4-dinitrochlorobenzene(DNCB). Method : They were divided into four group, Nor, Con, 1X and 5X, for evaluating the change of appearance of skin surface, skin hydration, thickness of epidermis and mast cell numbers during 30 days. Results : PTN suppressed symptoms of AD in appearance of skin and increased skin hydration for 1X and 5X. In histopathological examination, 1X and 5X significantly reduced the thickness of epidermis and number of mast cell in dermis. These results suggested that the PTN improved the AD-like symptoms of hairless Mice.

• 대한한방소아과학회지
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• 제28권3호
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• pp.59-73
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• 2014

Allergic contact dermatitis (ACD) is a type IV delayed hypersensitivity reaction that results from exposures and subsequent sensitization to an environmental chemical. Crataegus Pinnatifida (CP) is commonly used to improve spleen function, remove retention of food, and promote blood circulation. This study is designed to investigate the effects of CP on ACD induced by 2,4-dinitrochlorobenzene (DNCB) in mice. In this experiment, the effects of CP on changes in body weights, ear and dorsum skin thicknesses, ear weights, clinical aspects on the dorsum skin, histopathological changes, spleen weights, cytokines were investigated. In addition, the effects on the proliferation rates of splenocytes were also investigated in vivo and vitro study. In results, CP spread (CPS) group and CP spread and administered (CPS+Adm) group showed decrease in spleen weights. In CPS+Adm group, dorsum skin thicknesses were decreased significantly compared to control group. CP treatment diminished erythema, desquamation and keratosis which were induced by repeated painting of DNCB. In histopathological observation, spongiosis and edema were diminished in CPS and CPS+Adm group. CP led to decrease in the proliferation rates of splenocytes in vivo and vitro. In conclusion, these data suggest that CP can decrease symptoms of ACD, so CP is useful to treat patient with ACD.

• 대한한의학회지
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• 제38권3호
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• pp.30-42
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• 2017

Objectives: The purpose of this study was to investigate the effects of Angelica gigas Nakai extract(AGNE) and Bacillus polyfermenticus KJS-2 (BP2) on atopic dermatitis (AD) induced by 2, 4-dinitrochlorobenzene (DNCB) in mice. Methods: In the experiment, we divided mice into four groups: a control group, a DNCB group, an AGNE group, and an AGNE+BP2 group. Then we examined the changes in scratching frequency, clinical aspects on dorsum skin, immunoglobulin (IgE), cytokines ($TNF-{\alpha}$, IL-6) and expression of COX-2. Resutls: From the experiment, the scratching frequency was significantly dropped in AGNE group and AGNE+BP2 group. Clinical observations of dorsum skin, there were a severe keratotic lesion and drop of dead skin cell in DNCB group, but symptoms of AD were decreased 39.6% in AGNE group and 49.6% in AGNE+BP2 group during 3 weeks. IgE, $TNF-{\alpha}$ and IL-6 were decreased significantly in both AGNE and AGNE+BP2 group. Expression of COX-2 was also decreased significantly in both groups. Conclusions: In conclusion, these data suggest that AGNE can decrease symptoms of AD and BP2 makes AGNE more effective. So AGNE can be useful herbal therapy for AD.

• Toxicological Research
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• 제33권4호
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• pp.325-332
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• 2017

3-Bromo-4,5-dihydroxybenzaldehyde (BDB) is a natural bromophenol compound that is most commonly isolated from red algae. The present study was designed to investigate the anti-inflammatory properties of BDB on atopic dermatitis (AD) in mice induced by 2,4-dinitrochlorobenzene (DNCB) and on lipopolysaccharide (LPS)-stimulated murine macrophages. BDB treatment (100 mg/kg) resulted in suppression of the development of AD symptoms compared with the control treatment (induction-only), as demonstrated by reduced immunoglobulin E levels in serum, smaller lymph nodes with reduced thickness and length, a decrease in ear edema, and reduced levels of inflammatory cell infiltration in the ears. In RAW 264.7 murine macrophages, BDB (12.5, 25, 50, and $100{\mu}M$) suppressed the production of interleukin-6, a proinflammatory cytokine, in a dose-dependent manner. BDB also had an inhibitory effect on the phosphorylation of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-${\kappa}B$) and signal transducer and activator of transcription 1 (STAT1; Tyr 701), two major signaling molecules involved in cellular inflammation. Taken together, the results show that BDB treatment alleviates inflammatory responses in an atopic dermatitis mouse model and RAW 264.7 macrophages. These results suggest that BDB may be a useful therapeutic strategy for treating conditions involving allergic inflammation such as atopic dermatitis.

• 한국식품영양과학회지
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• 제44권8호
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• pp.1121-1127
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• 2015

2,4-Dinitrochlorobenzene(DNCB) 유도 아토피 피부염 BALB/c 모델에서 외톨개 모자반 에탄올 추출물(MMEE)의 항아토피 효과를 알아보기 위해 육안평가, severity score, 혈청 내 total immunoglobulin E(IgE), interleukin(IL)-4, tumor necrosis $factor-{\alpha}$($TNF-{\alpha}$), IL-10 분비량 및 비장 세포 배양액 내 IL-4, IL-5, IL-13, $interferon-{\gamma}$($IFN-{\gamma}$) 분비량을 측정하였다. DNCB 반복 도포로 아토피 피부염 증상인 건조, 홍반, 짓무름 등의 증상이 두드러지게 나타남을 확인하였고, 이러한 아토피 피부염의 증상은 MMEE의 처리로 인해 증상이 감소되는 것으로 나타났다. Severity score에서도 MMEE의 처리로 인해 DNCB 단독 처리군에 비해 점수가 낮아짐을 확인하였다. 혈청에서 total IgE 및 cytokine의 분비량을 측정한 결과 total IgE, $TNF-{\alpha}$, IL-4의 분비량은 DNCB 단독 처리군에서 증가하였으나 MMEE 처리구에서 normal 군과 유사한 수준으로 감소됨을 확인하였다. 반면 IL-10의 분비량은 DNCB 단독 처리군에서는 normal 군에 비해 감소하였으나 MMEE 처리구에서는 증가하였다. 비장세포 배양액 내에서 cytokine의 분비량을 측정한 결과 IL-4, IL-13 및 IL-5의 분비량은 DNCB 단독 처리군에서는 증가하였으나 MMEE 처리구에서는 normal 군과 유사한 수준으로 감소하였으며, $IFN-{\gamma}$의 분비량은 DNCB 단독 처리군에서는 감소하였으나 MMEE 처리구에서는 증가하여 정상군과 유의적인 차이를 보이지 않았다. 따라서 MMEE는 DNCB 유도 아토피 피부염 동물 모델에서 Th1/Th2 cytokine의 활성 조절 및 total IgE 분비 억제를 통해 아토피 피부염 증상 개선에 효과를 가지는 것으로 사료된다.

• 대한수의학회지
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• 제24권2호
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• pp.169-171
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• 1984

An expeliment was carried out to measure the cellular immune response in guinea pigs by sensitizing the animals with 2, 4-dinitrochlorobenzene(DNCB). The guinea pigs could be sensitized with one application of DNCB. The sensitizing and challenge dose was standardized. The histological response was characteristic of a delayed hypersensitivity reaction.

• 동의생리병리학회지
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• 제31권4호
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• pp.213-219
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• 2017

Atopic dermatitis (AD) is a common skin disease characterized by chronic and relapsing inflammatory dermatitis with immunological disturbances. Spleen deficiency (脾虛) is one of the major causes of AD, so development of animal model is required for AD research that reflects the pattern identification. The groups that we have used in this study included Senna folium extracts (SFE), 2,4-dinitrochlorobenzene (DNCB), and normal mice. Therefore, the present study was developed to atopic dermatitis mouse model with spleen deficiency in 2,4-dinitrochlorobenzene (DNCB) and senna leaves extracts induced AD in NC/Nga mice. The results demonstrated that senna leaves extract treatment significantly increased the dermatitis clinical score and epidermal thickness in AD-like skin lesions. We also proved beyond doubt that there was occurrence of erythema and skin moisture indices in the senna leaves extract groups. Further, we also found that the level of serum immunoglobulin E (IgE) in the senna leaves extract-treated group was increased. The amount of IL-4, IL-13, $TNF-{\alpha}$ and $TGF-{\beta}$ mRNA determined by real-time PCR was increased remarkably when senna leaves extract groups were treated on dorsal skin. Senna leaves extract groups significantly promoted the number of CD11B+/Gr-1 cell in skin, as well as the number of CD4+/CD8+ cell in dorsal skin compared with control. The review summarizes recent process in our understanding of the immunopathophysiology of spleen deficiency AD and the implications for spleen deficiency mouse models of AD on drug discovery from medical plants.

• 동의생리병리학회지
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• 제29권1호
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• pp.33-38
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• 2015

This study investigated the clinical parameters of atopic dermatitis and evaluated the inhibitory effects of Black currant seed oil for atopic dermatitis by using a Dinitrochlorobenzene(DNCB) induced BALB/c mice model. Five-week-old BALB/c mice were divided into four groups: normal group (N, non-treated), control group (C, atopic dermatitis-induced), positive control group (PC, Tacrolimus ointment-treated against induced atopic dermatitis, PC), experiment group (E, Black currant seed oil-treated against induced atopic dermatitis). After induction of atopic dermatitis by DNCB, the erythema, edema, eschar, and scratching were severely observed. The symptoms of atopic dermatitis were improved after 2 weeks, and almost disappeared after 4 weeks in PC and E group. The increased frequencies of scratching in C group were decreased in PC and E group. Transepidermal water loss, erythema index and serum IgE level were significantly decreased in E and PC compared to that in C after 4 weeks of the treatment. The results indicated that Black currant seed oil can relieve atopic dermatitis symptoms effectively, and may be possibly used as a functional material for suppression of atopic dermatitis.

• 한방안이비인후피부과학회지
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• 제27권3호
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• pp.115-132
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• 2014

Objective : Portulacae Herba (PH) can clear away heat, detoxicate, cool down blood heat. The present study was designed to investigate the effects of PH on ACD induced by 2,4-dinitrochlorobenzene (DNCB) in mice. Method : In this experiment, the effects of PH on changes in body weights, thicknesses and weights of ear, thicknesses of dorsum skin, degree of symptoms on the dorsum skin, histopathological changes of ear and dorsum skin, spleen weights, TNF-${\alpha}$ and IL-10 in serum were observed. And the effects on the proliferation rates of splenocytes were also investigated in vitro and in vivo. Results : 1. PH spread (PHS) group and PH spread plus administered (PHS+Adm) group didn't show any changes in weight and thickness of ear. 2. But in PHS and PHS+Adm group, thickness of dorsum skin decreased significantly. 3. And PHS and PHS+Adm group showed meaningful effectiveness on ACD symptoms like erythema, desquamation and keratinization. 4. In histopathological observation, hyperplasia and edema of spongy tissues were remarkably diminished in PHS and PHS+Adm group. 5. And PH reduced the proliferation rates of splenocytes in vivo and vitro study. Conclusions : PH effectively decreased symptoms of ACD in this study, therefore PH can be one of medicinal ingredients to treat ACD.