不同引物检测慢性牙周炎龈下菌斑中齿垢密螺旋体

目的：利用两个不同引物对慢性牙周炎患者患病部位及相对健康部位龈下菌斑中齿垢密螺旋体（Td）进行检测，以了解Td在慢性牙周炎患者不同部位的分布及Td检出率与牙周炎临床指标的关系。方法：收集58例慢性牙周炎患者患病部位及相对健康部位龈下菌斑标本，利用PCR分别扩增53kDa外膜蛋白表达基因tdpA片段及16srRNA保守区片段。结果：58个患病部位龈下菌斑标本中tdpA及16srRNA扩增的阳性率分别为58．6％和81．0％，而相对健康部位龈下菌斑标本中PCR阳性率分别为8．62％及15．5％，患病部位Td检出率高于相对健康部位（P〈0．001），16srRNA基因片段引物检出率高于tdpA基因片段（P〈0．05）。临床附着丧失≥5mm的患牙龈下菌斑标本中Td的检出率高于临床附着丧失〈5mm标本（P〈0．05），不同牙周袋深度及牙龈指数标本的Td检出率之间差异无统计学意义（P〉0．05）。结论：在慢性牙周炎患者活动部位龈下菌斑中Td检出率高于相对健康部位；Td感染与慢性牙周炎关系密切；利用16srRNA保守区片段对齿垢密螺旋体进行检测检出率高于tdpA基因片段。     

Anti‐Arthritic and Antiinflammatory Effects of the Traditional Uighur Formula Kursi Caper In Vivo

Kursi Caper (KC) is a Uighur medicine based on caper which is widely used to treat arthritis and rheumatism, and preliminary studies in our laboratory showed that this traditional formula may possess potent antiinflammatory effects. This study confirms the antiinflammatory effect of KC in the adjuvant induced arthritis (AIA) model, the carrageenan and cotton‐pellet induced granuloma rat models, and further investigates in vivo the mechanism of action by measuring relevant indicators of anti‐arthritic activity. KC showed significant and dose‐dependent anti‐arthritic and antiinflammatory effects, demonstrated by reduced paw edema and arthritic scores in all animal models. Histopathological examination showed that KC reduced levels of synovial inflammatory factors in AIA rats. The overproduction of TNF‐α and IL‐1β was attenuated, and CAT, MDA and SOD levels were restored to normal in KC‐treated rats. KC also significantly reduced LPS‐induced proliferation of B lymphocytes and ConA induced proliferation of T lymphocytes in a dose‐dependent manner. Flow cytometry showed that the high dose KC‐treated group had a significantly decreased frequency of Th17 cells. This study indicates that KC can significantly attenuate arthritis and inflammation in rats by decreasing the levels of inflammatory cytokines, regulating oxidative stress, reducing lymphocyte proliferation and decreasing Th17. This supports the traditional use of KC as a potential modern therapeutic agent for the treatment of arthritis and related conditions. Copyright © 2015 John Wiley & Sons, Ltd.     

玫瑰花口服液的红外指纹图谱及化学模式识别

目的:采用红外光谱和化学模式识别相结合建立了玫瑰花口服液质量评价的方法。方法:以11批玫瑰花口服液和4种伪品作红外光谱分析,对主要吸收峰进行指认,获得红外指纹图谱,并按不同特征吸收峰位下的透射比进行相似度计算,通过相似度分析对11批玫瑰花口服液及4种伪品的红外图谱一致性进行了考察,并把获得的指纹图谱采用系统聚类分析和主成分分析进行化学模式识别。结果:11批玫瑰花口服液红外指纹图谱一致性良好,玫瑰花口服液及伪品通过相似度分析和化学模式识别均能够很好地区分开来,相似度和聚类分析、主成分分析结果相一致,2种化学计量方法具有良好的相关性。结论:结果表明该方法是鉴别玫瑰花口服液真伪的有效方法。     

A bromine-catalysis-synthesized poly(3,4-ethylenedioxythiophene)/graphitic carbon nitride electrochemical sensor for heavy metal ion determination

In this paper, poly(3,4-ethylenedioxythiophene)/graphitic carbon nitride (PEDOT/g-C₃N₄) composites were prepared by the bromine catalysed polymerization (BCP) method with varying weight ratios of monomer to g-C₃N₄. For comparison, solid-state polymerization (SSP) and metal oxidative polymerization (MOP) methods were also used for the synthesis of PEDOT/g-C₃N₄ composites. Electrochemical determination of heavy metal ions (Cd²⁺ and Pb²⁺) was carried out by differential pulse voltammetry (DPV) on composite-modified glass carbon electrodes (GCEs), which were prepared by different methods. The obtained composites were analysed by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectroscopy (UV-vis), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that the bromine catalysed polymerization (BCP) method is an effective way to prepare the PEDOT/g-C₃N₄ composite, and the combination of PEDOT with g-C₃N₄ can improve the electrochemical activity of electrode materials. And, the composite from the BCP method modified electrode (PEDOT/10 wt% g-C₃N₄/GCE) exhibited the widest linear responses for Cd²⁺ and Pb²⁺, ranging from 0.06–12 μM and 0.04–11.6 μM with detection limits (S/N = 3) of 0.0014 μM and 0.00421 μM, respectively.

The PEDOT/g-C₃N₄ composite prepared by a Br₂-catalyzed polymerization method exhibited the widest linear electrochemical responses for Cd²⁺ and Pb²⁺.     

细粒棘球蚴囊液对体外培养小鼠脾细胞Foxp3及Smad4基因表达的影响

目的观察细粒棘球蚴囊液对体外培养BABL/c小鼠脾脏细胞中调节性T细胞(Treg细胞)相对特异分子Foxp3(叉头蛋白3)及TGF-β1(转化生长因子-β1)下游信号通路Smad4表达的影响。方法以BABL/c小鼠作为脾细胞供者,用研磨法分离脾脏细胞,随机分为实验组(与细粒棘球蚴囊液共同培养)和对照组,取1×105个细胞接种于96孔板上,分别在1、3、6和12 h提取RNA,实时荧光定量PCR(qRT-PCR)检测Foxp3以及Smad4的基因表达。结果 qRT-PCR显示,细粒棘球蚴囊液处理1、3和12 h,实验组Foxp3表达量分别为4.577±0.317、8.517±0.978和7.406±0.822,对照组分别为9.274±0.451、3.297±0.408和2.464±0.328,差异均有统计学意义(P<0.05);细粒棘球蚴囊液处理1 h和12 h,实验组Smad4表达量分别为3.862±1.417和1.690±0.248,对照组分别为1.689±0.221和3.600±1.081,差异有统计学意义(P<0.05),且Foxp3与Smad4二者之间存在负相关(r=-0.991,P<0.05)。结论...     

细粒棘球蚴重组抗原B诱导小鼠骨髓源树突状细胞表达吲哚胺2,3-双加氧酶的研究

目的观察细粒棘球蚴重组抗原B(rAgB)体外诱导小鼠骨髓源树突状细胞表达吲哚胺2,3-双加氧酶(IDO)的情况。方法从小鼠股骨中分离出骨髓细胞,进行小鼠重组巨噬细胞集落刺激因子(rmGM-CSF)的诱导,培养并获得CD11c+树突状细胞。应用倒置显微镜和扫描电镜观察树突状细胞形态,采用流式细胞术检测其表面标志物;用混合淋巴细胞反应(MLR)观察树突状细胞对T淋巴细胞的增殖能力。培养至第6天,收集未成熟树突状细胞进行流式细胞术检测;另向部分未成熟树突状细胞中加脂多糖(LPS)刺激24 h后,收集成熟树突状细胞,进行流式细胞术检测。在获得的未成熟树突状细胞中分别加入RPMI 1640完全培养液(为阴性对照组)、重组小鼠γ干扰素(rmIFN-γ,1 000 U/ml,为IFN-γ组)和rAgB(终浓度15μg/ml,为rAgB组),培养24 h后,通过细胞免疫组织化学和蛋白质印迹(Western blot-ting)检测各组树突状细胞IDO的表达情况。结果获得纯度为80%的CD11c+树突状细胞,在倒置显微镜和扫描电镜下均观察到典型树突状细胞。经LPS刺激的成熟树突状细胞的CD40、CD80和主要组织相容性复合体(...     

囊型包虫病患者外周血单核细胞诱导的树突状细胞形态及表型特点

目的研究囊型包虫病患者外周血单个核细胞(peripheral blood mononuclear cell,PBMC)体外诱导的树突状细胞(dendritic cell,DC)的形态及其细胞表型特点。方法囊型包虫病患者组(cystic echinococcosis,CE)15例,健康志愿者对照组(healthy donor,HD)15例,采外周血(肝素抗凝)分离单个核细胞后贴壁培养,施加重组细胞因子培养6d,诱导成DC,采用倒置显微镜和扫描电镜观察细胞形态,流式细胞术检测CD86、HLA-DR、CD1a、CD80的表达情况。结果与HD组比较,CE组PBMC诱导的DC表面的树突状突起较少,且细胞表面的CD86、HLA-DR、CD1a、CD80表达降低(P0.05)。结论CE组患者PBMC诱导的DC形态不典型,表面分子的表达降低,细胞活力降低,对T细胞的刺激能力减弱。