Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by elevated immunoglobulin E (IgE), mast cell infiltration and skin lesions including pruritus, erythema and eczema. Cudrania tricuspidata ex...Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by elevated immunoglobulin E (IgE), mast cell infiltration and skin lesions including pruritus, erythema and eczema. Cudrania tricuspidata extracts have been clinically administered for a long time in the East Asia including Korean and China as a home-remedy to diminish the inflammation of gastritis and hepatitis. To examine whether it works on AD or not, an AD-like animal model was experimented in this study. AD was induced by applying Dermatophagoides farinae (D. farinae) extract to the backs of 9-week old NC/Nga mice for 21 days. Following this, an ethanol extract of C. tricuspidata stems (EECT) was applied topically for 14 days to the sensitized skin, while distilled water was used as a control (EECT0 mice). Anti-AD effects of EECT were evaluated using scores for AD-like skin lesions, serum IgE levels and mast cell counts in the skin dermal layers to assess inflammation. Topically applied ethanol extract of Cudrania tricuspidata stems (EECT 7.5, 25 and 75 mg/mL) markedly reduced AD-like skin lesions after 4 days (by 30.1%, 31.4% and 38.5%, respectively) and also after 14 days (by 63.6%, 66.1% and 49.6%, respectively), while distilled water improved AD by 17.8% and 38.7%, respectively (p D. farinae extract (p = 0.003) and EECT attenuated the mast cell overproduction, and reduced mast cell degranulation markedly. Attenuation was most obvious in the early stage of EECT treatment when the AD was most acute.展开更多
Objective:To explore the effect of bacilli Galmette-Gurin(BCG)-polysaccharide nuceic acid on atopic dermatitis in mice and its mechanism.Methods:Forty NC/Nga mice were selected and randomly divided into Group A(model ...Objective:To explore the effect of bacilli Galmette-Gurin(BCG)-polysaccharide nuceic acid on atopic dermatitis in mice and its mechanism.Methods:Forty NC/Nga mice were selected and randomly divided into Group A(model group),Group B(dexamethasone treatment group),Group C(BCG polysaccharide nucleic acid treatment group) and Group D(control group) with 10 mice in each group.Atopic dermatitis model were constructed by applying 2,4-dinitrochlorobenzene on the skin of the mice.Mice in Group D were treated with acetone solution(100 μ L) on the foot pad and abdomen after hair removal at the age of 7 weeks.then on ear skin at the age of 8-13 weeks.For mice in A,B and C groups,100 μL of acetone solution containing 2,4-dinitrochlorobenzene was applied to the foot pad and the abdomen at the age of 7 weeks,then on ear skins at the age of8 to 13 weeks.At the age of 7-13 weeks,mice in Group A and Group D were treated with 100 μL saline(i.p.);mice were given dexamethasone(0.1 mL/kg,i.p.) every other day for 7 weeks in Group B;mice were treated with BCG polysaccharide nucleic acid(0.5 mg/kg,i.p.) every other day for7 weeks in Group C.The ear thickness was measured every week and the scratching frequency was recorded 1 times for 10 min a week.The mice were sacrificed after the last administration of drugs,IgE,IL-4,IL-10,IL-I2 and IFN- γ in the plasma were detected using ELISA,and RT-PCR method was employed to detect the concentrations of IL-4,IL-10,IL-12 and IFN- γ proteins.After IIK staining,the lesion degree of inflammation in ear tissue was observed microscopically.Results:The ear thickness and scratching frequency of Group A were significantly higher than those in group B,C and D(P<0.05),and there was no significant difference between Group B and C(P>0.05);the concentrations of IgE,IL-4 and IL-10 in the plasma and the expression of IL-4,IL-10 mRNA in the spleen tissues of Group A,B and C were all significantly higher than those of Group D(P<0.05);the concentrations of plasma IL-12 and IFN- γ,and spleen protein expression of IL-12 and IFN- γ in Group C mice were significantly higher than those of Group A(P<0.05).Histological observation showed obvious ear tissue exudation,erythema,swelling,desquamation of skin,and scabbing in Group A.Histopathology of the skin lesion also showed hyperkeratosis,focal-parakeratosis,stratum spinosum hypertrophy,mild sponge-like edema,a large number of lymphocytes along with plasma cell infiltration in dermis,angiectasis and hyperemia in Group A,while degree of ear skin lesion in Group B and D mice was significandy lighter than that of Group A.Conclusions:BCC polysaccharide nucleic acid can significandy reduce the serum IgE concentrations,increase the expression of IL-12,IFN- γ protein,correct the imbalance of Th1/Th2 in atopic dermatitis mice,and has obvious inhibitory effect on atopic dermatitis in NC/Nga mice.展开更多
背景:Nc/Nga小鼠皮损、病理和免疫学特征等均与人类特应性皮炎相一致,作为特应性皮炎动物模型其研究价值日益显现。目前国内尚无Nc/Nga小鼠的生理生化指标等相关数据报道。目的:观察特应性皮炎动物模型Nc/Nga小鼠的生长繁殖性能以及血...背景:Nc/Nga小鼠皮损、病理和免疫学特征等均与人类特应性皮炎相一致,作为特应性皮炎动物模型其研究价值日益显现。目前国内尚无Nc/Nga小鼠的生理生化指标等相关数据报道。目的:观察特应性皮炎动物模型Nc/Nga小鼠的生长繁殖性能以及血液生理、生化指标。方法:统计Nc/Nga小鼠1-3胎的繁殖指标数据,包括每胎产仔数、离乳率、怀孕率及胎间隔。分别称取60只1-56 d Nc/Nga仔鼠的体质量,雌雄各半,绘制其生长表格。Nc/Nga鼠眼眶采血,测定其血常规和生化值。结果与结论:Nc/Nga小鼠平均交配分娩间隔为(25.8±3.1)d,平均产仔数为(7.5±2.5)只,平均离乳率为(97.2±1.2)%、平均怀孕率为(97.0±1.4)%,1-3胎间差异无显著性意义(P>0.05)。Nc/Nga小鼠的体质量随着日龄的增长而逐渐增加,断奶后一两周内增重最为迅速,6周后体质量雌雄间差异无显著性意义(P>0.05)。同一日龄的雌雄间血常规和生化值比较,雌性小鼠红细胞、血红蛋白明显高于雄性小鼠;雄性小鼠血小板计数明显高于雌性小鼠(P<0.05);雌性小鼠三酰甘油、白蛋白水平明显高于雄性小鼠(P<0.05)。提示性别和年龄都会影响Nc/Nga小鼠的血液生理和生化值指标。展开更多
Objective To study the effect of glucagon-like peptide-1 agonist(exendin-4)on insulin signaling pathway in skeletal muscle of mice with insulin resistance(IR).Methods Thirty male KM mice were divided into normal contr...Objective To study the effect of glucagon-like peptide-1 agonist(exendin-4)on insulin signaling pathway in skeletal muscle of mice with insulin resistance(IR).Methods Thirty male KM mice were divided into normal control group(NC group,n=10)and IR group(n=20).The mice in NC group and IR group were fed展开更多
文摘Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by elevated immunoglobulin E (IgE), mast cell infiltration and skin lesions including pruritus, erythema and eczema. Cudrania tricuspidata extracts have been clinically administered for a long time in the East Asia including Korean and China as a home-remedy to diminish the inflammation of gastritis and hepatitis. To examine whether it works on AD or not, an AD-like animal model was experimented in this study. AD was induced by applying Dermatophagoides farinae (D. farinae) extract to the backs of 9-week old NC/Nga mice for 21 days. Following this, an ethanol extract of C. tricuspidata stems (EECT) was applied topically for 14 days to the sensitized skin, while distilled water was used as a control (EECT0 mice). Anti-AD effects of EECT were evaluated using scores for AD-like skin lesions, serum IgE levels and mast cell counts in the skin dermal layers to assess inflammation. Topically applied ethanol extract of Cudrania tricuspidata stems (EECT 7.5, 25 and 75 mg/mL) markedly reduced AD-like skin lesions after 4 days (by 30.1%, 31.4% and 38.5%, respectively) and also after 14 days (by 63.6%, 66.1% and 49.6%, respectively), while distilled water improved AD by 17.8% and 38.7%, respectively (p D. farinae extract (p = 0.003) and EECT attenuated the mast cell overproduction, and reduced mast cell degranulation markedly. Attenuation was most obvious in the early stage of EECT treatment when the AD was most acute.
文摘Objective:To explore the effect of bacilli Galmette-Gurin(BCG)-polysaccharide nuceic acid on atopic dermatitis in mice and its mechanism.Methods:Forty NC/Nga mice were selected and randomly divided into Group A(model group),Group B(dexamethasone treatment group),Group C(BCG polysaccharide nucleic acid treatment group) and Group D(control group) with 10 mice in each group.Atopic dermatitis model were constructed by applying 2,4-dinitrochlorobenzene on the skin of the mice.Mice in Group D were treated with acetone solution(100 μ L) on the foot pad and abdomen after hair removal at the age of 7 weeks.then on ear skin at the age of 8-13 weeks.For mice in A,B and C groups,100 μL of acetone solution containing 2,4-dinitrochlorobenzene was applied to the foot pad and the abdomen at the age of 7 weeks,then on ear skins at the age of8 to 13 weeks.At the age of 7-13 weeks,mice in Group A and Group D were treated with 100 μL saline(i.p.);mice were given dexamethasone(0.1 mL/kg,i.p.) every other day for 7 weeks in Group B;mice were treated with BCG polysaccharide nucleic acid(0.5 mg/kg,i.p.) every other day for7 weeks in Group C.The ear thickness was measured every week and the scratching frequency was recorded 1 times for 10 min a week.The mice were sacrificed after the last administration of drugs,IgE,IL-4,IL-10,IL-I2 and IFN- γ in the plasma were detected using ELISA,and RT-PCR method was employed to detect the concentrations of IL-4,IL-10,IL-12 and IFN- γ proteins.After IIK staining,the lesion degree of inflammation in ear tissue was observed microscopically.Results:The ear thickness and scratching frequency of Group A were significantly higher than those in group B,C and D(P<0.05),and there was no significant difference between Group B and C(P>0.05);the concentrations of IgE,IL-4 and IL-10 in the plasma and the expression of IL-4,IL-10 mRNA in the spleen tissues of Group A,B and C were all significantly higher than those of Group D(P<0.05);the concentrations of plasma IL-12 and IFN- γ,and spleen protein expression of IL-12 and IFN- γ in Group C mice were significantly higher than those of Group A(P<0.05).Histological observation showed obvious ear tissue exudation,erythema,swelling,desquamation of skin,and scabbing in Group A.Histopathology of the skin lesion also showed hyperkeratosis,focal-parakeratosis,stratum spinosum hypertrophy,mild sponge-like edema,a large number of lymphocytes along with plasma cell infiltration in dermis,angiectasis and hyperemia in Group A,while degree of ear skin lesion in Group B and D mice was significandy lighter than that of Group A.Conclusions:BCC polysaccharide nucleic acid can significandy reduce the serum IgE concentrations,increase the expression of IL-12,IFN- γ protein,correct the imbalance of Th1/Th2 in atopic dermatitis mice,and has obvious inhibitory effect on atopic dermatitis in NC/Nga mice.
文摘背景:Nc/Nga小鼠皮损、病理和免疫学特征等均与人类特应性皮炎相一致,作为特应性皮炎动物模型其研究价值日益显现。目前国内尚无Nc/Nga小鼠的生理生化指标等相关数据报道。目的:观察特应性皮炎动物模型Nc/Nga小鼠的生长繁殖性能以及血液生理、生化指标。方法:统计Nc/Nga小鼠1-3胎的繁殖指标数据,包括每胎产仔数、离乳率、怀孕率及胎间隔。分别称取60只1-56 d Nc/Nga仔鼠的体质量,雌雄各半,绘制其生长表格。Nc/Nga鼠眼眶采血,测定其血常规和生化值。结果与结论:Nc/Nga小鼠平均交配分娩间隔为(25.8±3.1)d,平均产仔数为(7.5±2.5)只,平均离乳率为(97.2±1.2)%、平均怀孕率为(97.0±1.4)%,1-3胎间差异无显著性意义(P>0.05)。Nc/Nga小鼠的体质量随着日龄的增长而逐渐增加,断奶后一两周内增重最为迅速,6周后体质量雌雄间差异无显著性意义(P>0.05)。同一日龄的雌雄间血常规和生化值比较,雌性小鼠红细胞、血红蛋白明显高于雄性小鼠;雄性小鼠血小板计数明显高于雌性小鼠(P<0.05);雌性小鼠三酰甘油、白蛋白水平明显高于雄性小鼠(P<0.05)。提示性别和年龄都会影响Nc/Nga小鼠的血液生理和生化值指标。
文摘Objective To study the effect of glucagon-like peptide-1 agonist(exendin-4)on insulin signaling pathway in skeletal muscle of mice with insulin resistance(IR).Methods Thirty male KM mice were divided into normal control group(NC group,n=10)and IR group(n=20).The mice in NC group and IR group were fed
