Casticin alleviates lipopolysaccharide‐induced inflammatory responses and expression of mucus and extracellular matrix in human airway epithelial cells through Nrf2/Keap1 and NF‐κB pathways

Asthma is one of the most common chronic inflammatory diseases of childhood, characterized by airway inflammation, mucus hypersecretion, and accumulation of extracellular matrix proteins. Casticin is an active compound that possesses broad biological activities including anti‐inflammatory effect. However, the effect of casticin on asthma remains unknown. The aim of the present study was to evaluate the effect and mechanism of casticin on inflammatory responses and expression of mucus and extracellular matrix in human airway epithelial cells. The results showed that lipopolysaccharide induced the mRNA and protein levels of IL‐6, IL‐8, MUC5AC, collagen type I, and fibronectin in 16‐HBE cells, whereas casticin treatment significantly inhibited the induction of lipopolysaccharide. Casticin induced Nrf2/Keap1 and inhibited nuclear factor κB pathways in 16‐HBE cells. Knockdown of Nrf2 attenuated the effect of casticin on production of IL‐6 and IL‐8, expression of MUC5AC, collagen type I, and fibronectin in 16‐HBE cells. In conclusion, the results indicated that casticin might be a novel therapeutic strategy for the treatment of asthma.     

Coriolus versicolor suppresses inflammatory bowel disease by Inhibiting the expression of STAT1 and STAT6 associated with IFN-γ and IL-4 expression

To investigate the effects of Coriolus versicolor extract (CVE) on infl ammatory bowel disease (IBD), ulcerative colitis was induced in male BALb/c mice by administering drinking water containing dextran‐sulfate sodium (DSS). The mice were divided into the following four experimental groups: control, DSS‐induced colitis, CVE treatment and CVE treatment + DSS‐induced colitis. Mice receiving DSS treatment developed clinical and macroscopic signs of ulcerative colitis. However, treatment with CVE relieved the symptoms of IBD, including the decrease in body and organ weight. The levels of serum, spleen and mesenteric lymph node IgE in the CVE‐treated groups was lower compared with the untreated groups. The antiinfl ammatory response upon CVE treatment correlated with the reduced expression of TNF‐α, IL‐1β and IL‐6. Also, there was a significant reduction in the expression of STAT1 and STAT6 molecules, thereby leading to lower IFN‐γ and IL‐4 expression. Therefore, the antiinfl ammatory effects of Coriolus versicolor can be explained by its ability to inhibit certain proinflammatory cytokines. Copyright © 2011 John Wiley & Sons, Ltd.     

白头翁汤治疗溃疡性结肠炎分子机制的网络药理学分析及初步验证

该文通过网络药理学分析白头翁汤治疗溃疡性结肠炎(UC)的分子机制,并通过动物实验对相关靶点作初步验证。应用Cytoscape软件,通过TCMSP,GeneCards,Uniprot数据库构建"活性成分-靶点-疾病"网络。通过STRING数据库构建蛋白互作网络,推测核心靶点。使用R软件对靶点进行GO,KEGG富集分析。使用Autodock Vina软件对活性成分和核心靶点进行分子对接。用白头翁汤干预葡聚糖硫酸钠(DSS)诱导UC小鼠,通过HE染色法观察小鼠结肠的病理改变,通过免疫组化分析相关基因的表达情况。结果表明,通过网络药理学从白头翁汤中找到26个有效成分,30个核心靶点。GO富集分析显示,这些基因主要影响核受体的活性、转录因子的活性、类固醇激素受体活性、泛素样蛋白连接酶结合、蛋白质异二聚化活性、转录辅助因子的结合等生物过程。KEGG富集分析显示,P53信号通路、EGFR信号通路、TNF信号通路、PI3K-AKT信号通路和一些癌症相关通路基因富集较多。分子对接显示,与有效成分对接较好的基因有EGFR,PPARG,CASP3,NOS3,caspase-9,CCND1,ADH,IL6,NFKB1。实验验证白头翁汤对小鼠结肠病理有改善作用,EGFR是其作用的靶点之一。该研究证明白头翁汤可通过多靶点、多通路治疗UC,为未来研究提供了理论依据。     

多维生物网络探讨鸦胆子治疗溃疡性结肠炎的潜在药效成分和分子机制＊

目的研究中药鸦胆子治疗溃疡性结肠炎(Ulcerative colitis,UC)的潜在药效成分及其分子生及SwissTargetPrediction数据库查询化学成分对应的靶点;在GeneCards数据库查询UC的靶点。找出成分与疾病的共同靶点,作为鸦胆子治疗UC的潜在靶点,并通过String数据库得出潜在靶点间互相作用关系图;使运用ClueGO插件对潜在靶点进行相关通路分析。结果鸦胆子治疗UC的活性成分有37个,并通过影响PTGS2、IL6、PPARG、AKT1、JUN、EGFR、STAT3、MMP9、MMP2、HIF1A、PTPRC等41个关键靶点,调节HIF-1信号通路、AGE-RAGE信号通路、趋化因子信号通路、癌症相关通路以及其他疾病通路等发挥作用。结论鸦胆子治疗UC可能主要通过木犀草素、亚油酸、棕榈酸等成分调控PTGS2、IL6、AKT1、EGFR、STAT3、HIF1A药理学研究能为其临床应用提供更多理论依据。     

Pharmacological Activity of 6‐Gingerol in Dextran Sulphate Sodium‐induced Ulcerative Colitis in BALB/c Mice

Gingerols are phenolic compounds in ginger (Zingiber officinale), which have been reported to exhibit antiinflammatory, antioxidant, and anticancer properties. The present study aimed at evaluating the possible pharmacologic activity of 6‐gingerol in a mouse model of dextran sulphate sodium (DSS)‐induced ulcerative colitis. Adult male mice were exposed to DSS in drinking water alone or co‐treated with 6‐gingerol orally at 50, 100, and 200 mg/kg for 7 days. Disease activity index, inflammatory mediators, oxidative stress indices, and histopathological examination of the colons were evaluated to monitor treatment‐related effects of 6‐gingerol in DSS‐treated mice. Administration of 6‐gingerol significantly reversed the DSS‐mediated reduction in body weight, diarrhea, rectal bleeding, and colon shrinkage to near normal. Moreover, 6‐gingerol significantly suppressed the circulating concentrations of interleukin‐1β and tumor necrosis factor alpha and restored the colonic nitric oxide concentration and myeloperoxidase activity to normal in DSS‐treated mice. 6‐Gingerol efficiently prevented colonic oxidative damage by increasing the activities of antioxidant enzymes and glutathione content, decreasing the hydrogen peroxide and malondialdehyde levels, and ameliorated the colonic atrophy in DSS‐treated mice. 6‐Gingerol suppressed the induction of ulcerative colitis in mice via antioxidant and antiinflammatory activities, and may thus represent a potential anticolitis drug candidate. Copyright © 2015 John Wiley & Sons, Ltd.     

Nimbolide Inhibits Nuclear Factor‐КB Pathway in Intestinal Epithelial Cells and Macrophages and Alleviates Experimental Colitis in Mice

Nimbolide is a limonoid extracted from neem tree (Azadirachta indica) that has antiinflammatory properties. The effect of nimbolide on the nuclear factor‐kappa B (NF‐κB) pathway in intestinal epithelial cells (IECs), macrophages and in murine colitis models was investigated. The IEC COLO 205, the murine macrophage cell line RAW 264.7, and peritoneal macrophages from interleukin‐10‐deficient (IL‐10^?/?) mice were preconditioned with nimbolide and then stimulated with tumor necrosis factor‐α (TNF‐α) or lipopolysaccharide. Dextran sulfate sodium‐induced acute colitis model and chronic colitis model in IL‐10^?/? mice were used for in vivo experiments. Nimbolide significantly suppressed the expression of inflammatory cytokines (IL‐6, IL‐8, IL‐12, and TNF‐α) and inhibited the phosphorylation of IκBα and the DNA‐binding affinity of NF‐κB in IECs and macrophages. Nimbolide ameliorated weight loss, colon shortening, disease activity index score, and histologic scores in dextran sulfate sodium colitis. It also improved histopathologic scores in the chronic colitis of IL‐10^?/? mice. Staining for phosphorylated IκBα was significantly decreased in the colon tissue after treatment with nimbolide in both models. Nimbolide inhibits NF‐κB signaling in IECs and macrophages and ameliorates experimental colitis in mice. These results suggest nimbolide could be a potentially new treatment for inflammatory bowel disease. Copyright © 2016 John Wiley & Sons, Ltd.     

Nigakinone alleviates DSS-induced experimental colitis via regulating bile acid profile and FXR/NLRP3 signaling pathways

The correlation of bile acid (BA) metabolism disorder with the pathogenesis of ulcerative colitis (UC) is realized nowadays. Farnesoid X receptor (FXR), a controller for BA homeostasis and inflammation, is a promising target for UC therapy. Nigakinone has potential therapeutic effects on colitis. Herein, we investigated the anti-UC effects and mechanism of nigakinone in colitic animals induced by dextran sulfate sodium (DSS). The related targets involved in the nucleotide-binding oligomerization domain, leucine-rich repeat, and pyrin domain-containing 3 (NLRP3) signaling pathway were measured. BA-targeted metabolomics was employed to reveal the regulatory effects of nigakinone on BA profile in colitis, while expressions of FXR and its mediated targets referring to BA enterohepatic circulation were determined. The critical role of FXR in the treatment of nigakinone for colitis was studied via molecule-docking, dual-luciferase reporter® (DLR™) assays, FXR silencing cells, and FXR knockout mice. Results showed nigakinone attenuated DSS-induced colitis symptoms, including excessive inflammatory response by NLRP3 activation, and injury of the intestinal mucosal barrier. Nigakinone regulated BA disorders by controlling cholesterol hydroxylase and transporters mediated by FXR, then decreased BA accumulation in colon. Molecular-docking and DLR™ assays indicated FXR might be a target of nigakinone. In vitro, nigakinone restrained BA-induced inflammation and cell damage via FXR activation and inhibition of inflammatory cytokines. However, ameliorating effects of nigakinone on colitis were suppressed by FXR knockout or silencing in vivo or in vitro. Taken together, nigakinone ameliorated experimental colitis via regulating BA profile and FXR/NLRP3 signaling pathway.     

Retracted: Ganoderic acid A alleviates hypoxia‐induced apoptosis,autophagy, and inflammation in rat neural stem cells through the PI3K/AKT/mTOR pathways

Effects of ganoderic acid A (GAA), a lanostane triterpene, on hypoxia‐ischemia encephalopathy (HIE) remain unclear. We aimed to figure out the specific role of GAA in hypoxia‐treated neural stem cells (NSCs) as well as the regulatory mechanisms. Primary rat NSCs were incubated under hypoxia to simulate HIE. Viability and apoptosis of hypoxia‐injured NSCs were measured by cell counting kit‐8 and flow cytometry assays, respectively. Proteins related to apoptosis, autophagy, and the PI3K/AKT/mTOR pathways were evaluated by Western blot analysis. LY294002 and rapamycin were added to inhibit the PI3K/AKT pathway and mTOR pathway, respectively. Enzyme‐linked immunosorbent assay was carried out to test the release of proinflammatory cytokines. We found that hypoxia‐induced decrease of cell viability, increases of apoptotic cells and autophagy, and the release of IL‐6, IL‐1β, and TNF‐α were all attenuated by GAA stimulation. Activation of caspases induced by hypoxia was alleviated by GAA. Furthermore, we found that inhibition of the PI3K/AKT pathway eliminated the effects of GAA on apoptosis and proinflammatory cytokines release in hypoxia‐injured NSCs. Meanwhile, inhibition of the mTOR pathway abrogated the effects of GAA on cell autophagy in hypoxia‐injured NSCs. In conclusion, GAA alleviated hypoxia‐induced injury in NSCs might be through activating the PI3K/AKT and mTOR pathways.     

Involvement of mTOR‐related signaling in antidepressant effects of Sophoraflavanone G on chronically stressed mice

SophoraflavanoneG (SG), an important prenylated flavonoid isolated from Sophoraalopecuroides.L, is effective for many illnesses. The present study was designed to investigate whether the compound could reverse depressive‐like symptoms and investigate its possible mechanisms. Chronic Unpredictable Mild Stress (CUMS) mice were treated with fluoxetine and SG. The immobility time in forced swimming test (FST) and tail suspension test (TST) were recorded. The levels of pro‐inflammatory cytokines and neurotransmitters in the hippocampus were evaluated. Furthermore, the protein expressions of PI3K, AKT, mTOR, p70S6K, BDNF, and Trkb in hippocampus were detected. Rapamycin, the selective mTOR inhibitor, was used to estimate the potential mechanism. As a result, after 7 days of SG treatment, the immobility time in FST and TST was declined obviously. The levels of IL‐6, IL‐1β, and TNF‐α in the hippocampus were significantly reduced, and the quantity of 5‐HT and NE was raised considerably in SG‐treated group compared with the CUMS‐exposed group. Additionally, SG could up‐regulate the expressions of PI3K, AKT, mTOR, 70S6K, BDNF, and Trkb. The blockade of mammalian target of rapamycin signaling blunted the antidepressant effect and reversed the up‐regulation of BDNF expression caused by SG. These findings suggested that SG treatment alleviated depressive‐like symptoms via mTOR‐mediated BDNF/Trkb signaling.     

艾灸对溃疡性结肠炎大鼠结肠Ubiquitin及NLRP3蛋白的调节作用

目的:观察艾灸对溃疡性结肠炎(UC)大鼠结肠炎症和泛素(ubiquitin)、核苷酸结合寡聚化结构域(Nod)样受体蛋白3(NLRP3)蛋白表达的影响,探讨艾灸治疗UC的抗炎机制。方法:清洁级雄性Sprague-Dawley(SD)大鼠随机分为正常组、模型组、艾条灸组和西药组。采用自由饮用35g/L葡聚糖硫酸钠(DSS)溶液制备大鼠UC模型。艾条灸组取双侧天枢穴,给予温和灸治疗;西药组给予美沙拉嗪溶液灌胃治疗。正常组和模型组不进行任何治疗,只做与艾条灸组相同的抓取和固定。治疗结束后,采用苏木素-伊红(HE)染色,光镜下观察结肠组织病理损伤并评分;采用免疫荧光法测定结肠ubiquitin蛋白的表达;运用兔疫组织化学法检测结肠白细胞介素(IL)-1β和NLRP3蛋白的表达。结果:与正常组比较,模型组大鼠结肠组织损伤严重,病理评分明显升高(P<0.01),结肠ubiquitin、NLRP3及IL-1β蛋白表达均显著增强(均P<0.01)。与模型组比较,艾条灸组及西药组大鼠结肠损伤有所修复,炎症反应减轻,病理评分均降低(均P<0.01);ubiquitin、NLRP3及IL-1β蛋白的表达减少(均P<0.01)。相关分析显示,结肠组织ubiquitin蛋白与结肠病理评分、NLRP3蛋白的表达之间存在相关性(r=0.677,P<0.01;r=0.536,P<0.05).结论:艾灸能下调UC大鼠结肠ubiquitin、NLRP3和IL-IP蛋白的表达,该作用可能是其促进结肠炎性损伤修复、发挥抗炎作用的机制之一。     

实验性结肠炎大鼠结肠上皮细胞凋亡与肠道通透性的研究

目的探讨右旋葡聚硫酸钠（DSS）溶液诱导建立的溃疡性结肠炎（UC）大鼠模型肠上皮细胞凋亡改变与肠黏膜屏障的关系。方法将18只健康SD大鼠随机分成2组：UC组12只和NC组6只,UC组大鼠自由饮用DSS溶液（浓度为40g／L）7d,建立急性UC模型,NC组正常饮水,第8天处死大鼠,留取结肠标本,HE染色观察结肠黏膜病变,TUNEL细胞凋亡检测试剂盒检测UC大鼠结肠上皮细胞凋亡数。结果TUNEL细胞凋亡检测结果显示,UC组大鼠结肠上皮细胞凋亡数量明显高于NC纽,细胞凋亡数目和肠黏膜损伤的程度呈正相关。结论DSS诱导的UC大鼠肠上皮细胞凋亡增加,相邻细胞间的间隙增大,导致肠黏膜屏障受损,从而使肠道通透性增高。     

香连丸有效部位对小鼠急性溃疡性结肠炎的治疗作用

目的:研究香连丸有效部位对葡聚糖硫酸钠(dextran sulfate sodium,DSS)和20%乙醇联合诱导小鼠急性期溃疡性结肠炎(ulcerative colitis,UC)的治疗作用。方法:建立DSS和20%乙醇联合诱导的小鼠急性期UC模型,ig给予香连丸有效部位(0.292,0.584,1.168 g·kg-1),观察各组小鼠的一般状态、疾病活动指数、结肠性状、结肠组织病理学变化,进行疾病活动指数评分(disease activity index,DAI)、测定各鼠结肠长度质量比、脾脏系数、血清中丙二醛(MDA)的含量。结果:香连丸有效部位能显著改善结肠炎小鼠的一般状态,改善结肠的性状,减轻其结肠组织病理学损伤,降低其血清中MDA的含量。结论:香连丸有效部位对小鼠溃疡性结肠炎有较好的治疗作用。     

复方蜚蠊提取物缓解噁唑酮诱导大鼠活动期溃疡性结肠炎的作用机制

目的 研究复方蜚蠊提取物Ento-PB对噁唑酮诱导的活动期溃疡性结肠炎(UC)大鼠的治疗作用,并初步探讨其可能作用机制.方法 采用噁唑酮诱导的溃疡性结肠炎大鼠模型,灌胃给予柳氮磺胺吡啶(SASP,0.3g/kg)和复方Ento-PB (0.05、0.1、0.2 g/kg),通过测定大鼠DAI (疾病活动指数)、CMDI...     

Retracted: Lipopolysaccharides‐mediated injury to chondrogenic ATDC5 cells can be relieved by Sinomenine via downregulating microRNA‐192

Sinomenine (SIN) is an isoquinoline derived from Caulis Sinomenii that has been used to treat rheumatoid arthritis and osteoarthritis for several decades in China. This study aims to reveal the effects of SIN on mouse chondrogenic ATDC5 cells growth and inflammation. SIN was used to treat ATDC5 cells injured by lipopolysaccharides (LPS). The following parameters were determined for evaluating the treatment effects of SIN: cell viability, apoptosis, reactive oxygen species generation, and pro‐inflammatory cytokines release. Besides, the expression of LPS‐sensitive miRNA (miR‐192) and the activation of NF‐κB and MAPK signaling were studied to explain SIN's function. SIN with concentration of 30 μM significantly attenuated LPS‐induced cell damage via increasing cell viability, inhibiting apoptosis and reactive oxygen species generation, and declining IL‐6 and TNF‐α release. miR‐192 was downregulated by SIN treatment. Restoration of miR‐192 expression by miRNA transfection could significantly impede SIN's protective action. Besides, the inhibitory effects of SIN on the activation of NF‐κB and MAPK signaling were attenuated by miR‐192 overexpression. Furthermore, GDF11 was found to be a target gene of miR‐192. LPS‐mediated injury to chondrogenic ATDC5 cells can be relieved by SIN via downregulating miR‐192 and subsequently repressing the activation of NF‐κB and MAPK signaling.     

氧化苦参碱干预IκB-α蛋白对溃疡性结肠炎的治疗作用机制研究

目的:研究氧化苦参碱抗溃疡性结肠炎作用机制.方法:SPF级大鼠随机分成正常组、UC模型组、氧化苦参碱+ UC模型组(ig给予氧化苦参碱180 mg·kg-1)、柳氮磺胺吡啶+UC模型组(ig给予柳氮磺胺吡啶600 mg·kg-1).采用2,4,6-三硝基苯磺酸(TNBS)致大鼠溃疡性结肠炎症,莲续给药21 d.实验结束后,剖取结肠病灶组织,采用免疫组织化学方法检测各组动物结肠组织细胞中核转录因子κB(NF-κB)的抑制蛋白(IκB-α)蛋白阳性细胞表达率,同时测定每组动物结肠组织中肿瘤坏死因子-α(TNF-α),白介素(interleukin,IL) 1β( IL-1β),IL-6,IL-8细胞因子表达.并对每只动物结肠病理切片做显微镜检查.结果:氧化苦参碱组动物结肠黏膜细胞中IκB-o阳性细胞表达率21.8％±5.0％,显著低于模型组(25.6％±2.9％)(P＜0.01);结肠细胞中TNF-α( 66.23±2.64)pg· mg-1,IL-1β( 149.42±64.69) pg·mg-1,IL-6(668.83±98.11)pg·mg-1和IL-8(91.83±23.14) pg·mg-14种细胞因子的表达率较模型组相比也显著降低(P＜0.01);结肠组织显微镜检查,治疗组动物结肠细胞炎症、淋巴细胞浸润、黏膜损伤修复率明显高于模型组.结论:氧化苦参碱通过干预IκB-ακ蛋白表达,进而抑制溃疡性结肠炎症细胞中核转录因子κB(NF-κB)活性,产生抗炎效果.     

溃结康对溃疡性结肠炎小鼠NLRP3炎性体基因表达及下游炎性因子影响

目的探讨溃结康对溃疡性结肠炎小鼠NLRP3炎性体及下游炎性因子的影响。方法建立葡聚糖硫酸钠诱导小鼠实验性溃疡性结肠炎(急性期、缓解期)模型,实验分为正常对照组、模型组、柳氮磺胺吡啶组(0.45 g/kg)、溃结康(12.8、6.4、3.2 g/kg)组。第8天(急性期)及第21天(缓解期)实验结束时,采集结肠组织,量取各组小鼠结肠长度,HE染色观察小鼠结肠病理变化,免疫组化染色法检测结肠组织MPO表达,酶联免疫法检测结肠组织IL-18、IL-33含量变化,实时荧光定量PCR检测结肠NLRP3、ASC、Caspase-1mRNA表达。结果模型组单位结肠长度显著缩短,结肠组织损伤明显,MPO表达显著增加,结肠IL-18,IL-33水平明显升高,NLRP3、ASC、Caspase-1mRNA表达显著上调(P<0.05或P<0.01);与模型组比较,急性期时,柳氮磺胺吡啶组及溃结康高剂量组单位结肠长度明显增加,MPO表达显著降低,IL-18释放减少,NLRP3及Caspase-1mRNA表达显著下调(P<0.05或P<0.01),同时,溃结康中剂量组IL-18水平也显著降低,NLRP3 mRNA显著下调(P<0.05);溃结康低剂量组Caspase-1mRNA表达明显降低(P<0.05)。缓解期时,柳氮磺胺吡啶组及溃结康高、中剂量组单位结肠长度均明显增加(P<0.05或P<0.01);溃结康高剂量组NLRP3及Caspase-1mRNA表达显著增加,溃结康中剂量组IL18、IL-33含量明显增加,ASC、Caspase-1mRNA表达明显上调,低剂量组IL-33含量也明显增加(P<0.05),NLRP3 mRNA表达上调(P<0.05或P<0.01)。结论溃结康可能通过调节UC小鼠发病不同时期(急性期、缓解期)NLRP3炎性体(NLRP3、ASC、Caspase-1)基因表达及下游炎症因子的释放抑制炎症反应,促进缓解期时结肠黏膜修复。     

Intestinal anti-inflammatory activity of ellagic acid in the acute and chronic dextrane sulfate sodium models of mice colitis

Ethnopharmacological relevance

Pomegranate (Punica granatum L.; Lythraceae) has traditionally been used for the treatment of various inflammatory diseases, including ulcerative colitis (UC). Because its fruits and extracts are rich in ellagitannins, which release ellagic acid when hydrolyzed, consumption of pomegranate products is currently being widely promoted for their potential health effects, including the prevention of inflammatory diseases and cancer. To evaluate the anti-inflammatory effects of ellagic acid on dextran sulfate sodium (DSS)-induced acute and chronic experimental colitis in two different strains of mice and to elucidate its possible mechanisms of action.

Materials and methods

In the acute UC model, female Balb/C mice were treated with DSS (5%) for seven days while concomitantly receiving a dietary supplement of ellagic acid (2%). In the chronic UC model, female C57BL/6 mice received four week-long cycles of DSS (1% and 2%) interspersed with week-long recovery periods along with a diet supplemented with ellagic acid (0.5%).

Results

In acute model of UC, ellagic acid ameliorated disease severity slightly as observed both macroscopically and through the profile of inflammatory mediators (IL-6, TNF-α, and IFN-γ). In the chronic UC model, ellagic acid significantly inhibited the progression of the disease, reducing intestinal inflammation and decreasing histological scores. Moreover, mediators such as COX-2 and iNOS were downregulated and the signaling pathways p38 MAPK, NF-κB, and STAT3 were blocked.

Conclusions

Our study reinforces the hypothetical use of ellagic acid as an anti-inflammatory complement to conventional UC treatment in chronic UC patients and could be considered in the dietary prevention of intestinal inflammation and related cancer development.     

脾虚湿盛肝郁证溃疡性结肠炎大鼠模型的建立与评价

目的:建立并评价符合中医证候特点的脾虚温盛肝郁证溃疡性结肠炎(ulcerative colitis,UC)大鼠模型.方法:45只SPF级SD大鼠随机分为正常对照组、葡聚糖硫酸钠(DSS)组、病证结合组、模型组.正常对照组正常饲养,DSS组定量灌胃10％DSS溶液,病证结合组采用环境、饮食、情绪干预造模,模型组采用DSS...     

靛玉红对溃疡性结肠炎小鼠CD4CD25Treg细胞Foxp3表达的影响

目的观察青黛及其有效成分靛玉红对溃疡性结肠炎（UC）小鼠脾脏CD4CD25Treg细胞Foxp3表达的影响,探讨其治疗uc的作用机制和靶点。方法将50只BABL／c小鼠随机分为正常组、模型组、靛玉红组、青黛组和5-ASA组。除正常组外,其余小鼠采用自由饮用5％葡聚糖硫酸钠（DSS）溶液5天,制备DSS诱导的UC小鼠模型。于造模后第5天开始,予各组小鼠给药治疗7天。观察各组小鼠一般状况及结肠组织病理学改变,同时检测脾脏CD4CD25Treg细胞Foxp3的表达变化。结果与正常组比较,模型组小鼠CD4CD25Treg细胞Foxp3的表达显著减少（P〈0．01）;各治疗组CD4CD25Treg细胞Foxp3的表达较模型组升高（P〈0．01）。结论青黛及其有效成分靛玉红可通过上调CD4CD25Treg细胞Foxp3表达以防治UC。