目的:观察凉血活血胶囊对咪喹莫特诱导银屑病样小鼠模型中免疫异常的干预作用。方法:BALB/c雌性小鼠48只,随机分为正常对照组,模型组,凉血活血胶囊高、中、低剂量组和雷公藤多苷组。采用银屑病皮损面积和疾病严重程度(psoriasis area an...目的:观察凉血活血胶囊对咪喹莫特诱导银屑病样小鼠模型中免疫异常的干预作用。方法:BALB/c雌性小鼠48只,随机分为正常对照组,模型组,凉血活血胶囊高、中、低剂量组和雷公藤多苷组。采用银屑病皮损面积和疾病严重程度(psoriasis area and severity index,PASI)评分标准观察银屑病样小鼠模型皮损变化情况。光镜下观察皮损组织形态学变化,测量表皮层厚度。免疫组织化学法检测皮损中增殖细胞核抗原(proliferatingcell nuclear antigen,PCNA)反映表皮角质形成细胞增殖程度;检测CD3、CD11c、F4/80和Gr-1反映炎症浸润程度;检测CD31以反映血管增生情况。结果:模型组小鼠皮肤出现鳞屑红斑,皮损增厚;皮损组织表现为表皮棘层增厚,角化不全和微脓肿;真皮大量炎症细胞浸润,血管增生明显。与模型组比较,凉血活血胶囊组小鼠银屑病样皮损症状缓解,PASI分数降低,表皮角化不全减轻,角质形成增殖减少,T淋巴细胞、树突状细胞、巨噬细胞、中性粒细胞和单核细胞的浸润减弱,新生血管减少。结论:凉血活血胶囊可通过影响表皮细胞过度增殖、角化不全、炎症细胞浸润及血管增生而改善咪喹莫特诱导的小鼠银屑病样皮损变化。展开更多
Background Imiquimod is an imidazoquinoline, which class of compounds are known to have antiviral and antitumoural properties. In recent studies, it was shown that imiquimod modulates the T helper cell type Th1/Th2 re...Background Imiquimod is an imidazoquinoline, which class of compounds are known to have antiviral and antitumoural properties. In recent studies, it was shown that imiquimod modulates the T helper cell type Th1/Th2 response by inducing the production of Thl cytokines like IFN-γ, and by inhibiting the Th2 cytokines like interleukin （IL）-4. Several investigators have shown that T-bet and GATA-3 are master Thl and Th2 regulatory transcription factors. This study investigated whether irniquimod treatment inhibited airway inflammation by modulating transcription factors T-bet and GATA-3. Methods Thirty-six male SD rats were randomly divided into a control group, an asthmatic group, and an imiquimod group, which was exposed to an aerosol of 0.15% imiquimod. Twenty-four hours after the last ovalbumin （OVA） challenge, airway responsiveness was measured and changes in airway histology were observed. The concentrations of IL-4, IL-5 and IFN-γ in bronchoalveolar lavage fluid （BALF） and serum were measured by enzyme linked immunosorbent assay （ELISA）. The rnRNA expressions of IL-4, IL-5, IFN-γ, T-bet and GATA-3 in lung and in CD4^＋ T cells were determined by reverse transcription polymerase chain reaction （RT-PCR）. The protein expressions ofT-bet and GATA-3 were measured by Western blot. Results It was demonstrated that imiquimod 1） attenuated OVA induced airway inflammation; 2） diminished the degree of airway hyperresponsiveness （AHR）; 3） decreased the Th2 type cytokines and increased Thl type cytokines mRNA and protein levels; 4） modulated the Th1/Th2 reaction by inhibiting GATA-3 production and increasing T-bet production. Conclusion Imiquimod treatment inhibits OVA induced airway inflammation by modulating key master switches GATA-3 and T-bet that result in committing T helper cells to a Thl phenotype.展开更多
目的:观察养血解毒汤对咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损的干预作用。方法:STAT3转基因小鼠24只,随机分为正常对照组、模型组、养血解毒汤组和甲氨蝶呤组,每组6只,采用外用咪喹莫特诱导皮肤银屑病样模型。分别观察皮损面积和...目的:观察养血解毒汤对咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损的干预作用。方法:STAT3转基因小鼠24只,随机分为正常对照组、模型组、养血解毒汤组和甲氨蝶呤组,每组6只,采用外用咪喹莫特诱导皮肤银屑病样模型。分别观察皮损面积和疾病严重程度(psoriasis area and severity index,PASI),光镜下观察皮损组织形态学变化和表皮层厚度;采用皮肤水分油分测试笔检测小鼠背部皮肤水分和油分含量;免疫组织化学法检测皮损中增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)和T淋巴细胞表面标志CD3表达;采用实时荧光定量PCR技术检测皮损Th17类细胞因子(IL-17A、IL-17C、IL-22和RORγt)mRNA表达;采用Western blot检测皮损STAT3通路蛋白(STAT3、p-STAT3、JAK3、p-JAK3和SOCS3)的表达水平。结果:(1)养血解毒汤组PASI评分明显低于模型组,HE染色观察发现养血解毒汤组皮损表皮增生较模型组少,角化不全的细胞明显减少,皮肤厚度降低(P<0.01);(2)养血解毒汤组皮损油分和水分含量均明显高于模型组(P<0.05);(3)养血解毒汤组PCNA阳性表达远低于模型组(P<0.01);(4)养血解毒汤组脾脏重量低于模型组(P<0.05);(5)养血解毒汤组Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)表达水平均低于模型组,此外,p-STAT3和p-JAK3表达量亦低于模型组,而SOCS3的表达高于模型组。结论:养血解毒汤可能通过抑制STAT3的磷酸化,减少Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)的分泌,由此改善咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损改变。展开更多
文摘目的:观察凉血活血胶囊对咪喹莫特诱导银屑病样小鼠模型中免疫异常的干预作用。方法:BALB/c雌性小鼠48只,随机分为正常对照组,模型组,凉血活血胶囊高、中、低剂量组和雷公藤多苷组。采用银屑病皮损面积和疾病严重程度(psoriasis area and severity index,PASI)评分标准观察银屑病样小鼠模型皮损变化情况。光镜下观察皮损组织形态学变化,测量表皮层厚度。免疫组织化学法检测皮损中增殖细胞核抗原(proliferatingcell nuclear antigen,PCNA)反映表皮角质形成细胞增殖程度;检测CD3、CD11c、F4/80和Gr-1反映炎症浸润程度;检测CD31以反映血管增生情况。结果:模型组小鼠皮肤出现鳞屑红斑,皮损增厚;皮损组织表现为表皮棘层增厚,角化不全和微脓肿;真皮大量炎症细胞浸润,血管增生明显。与模型组比较,凉血活血胶囊组小鼠银屑病样皮损症状缓解,PASI分数降低,表皮角化不全减轻,角质形成增殖减少,T淋巴细胞、树突状细胞、巨噬细胞、中性粒细胞和单核细胞的浸润减弱,新生血管减少。结论:凉血活血胶囊可通过影响表皮细胞过度增殖、角化不全、炎症细胞浸润及血管增生而改善咪喹莫特诱导的小鼠银屑病样皮损变化。
文摘Background Imiquimod is an imidazoquinoline, which class of compounds are known to have antiviral and antitumoural properties. In recent studies, it was shown that imiquimod modulates the T helper cell type Th1/Th2 response by inducing the production of Thl cytokines like IFN-γ, and by inhibiting the Th2 cytokines like interleukin （IL）-4. Several investigators have shown that T-bet and GATA-3 are master Thl and Th2 regulatory transcription factors. This study investigated whether irniquimod treatment inhibited airway inflammation by modulating transcription factors T-bet and GATA-3. Methods Thirty-six male SD rats were randomly divided into a control group, an asthmatic group, and an imiquimod group, which was exposed to an aerosol of 0.15% imiquimod. Twenty-four hours after the last ovalbumin （OVA） challenge, airway responsiveness was measured and changes in airway histology were observed. The concentrations of IL-4, IL-5 and IFN-γ in bronchoalveolar lavage fluid （BALF） and serum were measured by enzyme linked immunosorbent assay （ELISA）. The rnRNA expressions of IL-4, IL-5, IFN-γ, T-bet and GATA-3 in lung and in CD4^＋ T cells were determined by reverse transcription polymerase chain reaction （RT-PCR）. The protein expressions ofT-bet and GATA-3 were measured by Western blot. Results It was demonstrated that imiquimod 1） attenuated OVA induced airway inflammation; 2） diminished the degree of airway hyperresponsiveness （AHR）; 3） decreased the Th2 type cytokines and increased Thl type cytokines mRNA and protein levels; 4） modulated the Th1/Th2 reaction by inhibiting GATA-3 production and increasing T-bet production. Conclusion Imiquimod treatment inhibits OVA induced airway inflammation by modulating key master switches GATA-3 and T-bet that result in committing T helper cells to a Thl phenotype.
文摘目的:观察养血解毒汤对咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损的干预作用。方法:STAT3转基因小鼠24只,随机分为正常对照组、模型组、养血解毒汤组和甲氨蝶呤组,每组6只,采用外用咪喹莫特诱导皮肤银屑病样模型。分别观察皮损面积和疾病严重程度(psoriasis area and severity index,PASI),光镜下观察皮损组织形态学变化和表皮层厚度;采用皮肤水分油分测试笔检测小鼠背部皮肤水分和油分含量;免疫组织化学法检测皮损中增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)和T淋巴细胞表面标志CD3表达;采用实时荧光定量PCR技术检测皮损Th17类细胞因子(IL-17A、IL-17C、IL-22和RORγt)mRNA表达;采用Western blot检测皮损STAT3通路蛋白(STAT3、p-STAT3、JAK3、p-JAK3和SOCS3)的表达水平。结果:(1)养血解毒汤组PASI评分明显低于模型组,HE染色观察发现养血解毒汤组皮损表皮增生较模型组少,角化不全的细胞明显减少,皮肤厚度降低(P<0.01);(2)养血解毒汤组皮损油分和水分含量均明显高于模型组(P<0.05);(3)养血解毒汤组PCNA阳性表达远低于模型组(P<0.01);(4)养血解毒汤组脾脏重量低于模型组(P<0.05);(5)养血解毒汤组Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)表达水平均低于模型组,此外,p-STAT3和p-JAK3表达量亦低于模型组,而SOCS3的表达高于模型组。结论:养血解毒汤可能通过抑制STAT3的磷酸化,减少Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)的分泌,由此改善咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损改变。
