64排螺旋CT冠状动脉成像对不典型胸痛冠心病患者的诊断价值

目的:探讨在不典型性胸痛的冠心病病人诊断鉴别中使用64排螺旋CT冠脉成像的价值。材料与方法:随机选取我院近年来收治的80例不典型性胸痛病人,采用64排螺旋的CT冠状动脉成像,之后使用选择性的冠状动脉造影,即SCA,在选择性冠状动脉造影的基础上评价64排螺旋CT成像的准确性。结果:64排螺旋的CT冠状动脉成像分别具有91%的准确度,80%的特异度和97%的敏感度;64排螺旋的CT冠状动脉成像分别具有59%的轻度狭窄确诊率和90%的中度及以上狭窄确诊率,具有显著性差异(P<0.01);而对于右冠状动脉和左回旋支,64排螺旋的CT冠状动脉成像判断病变的能力较弱。结论:64排螺旋的CT冠状动脉成像基本上可以作为不典型性胸痛的冠心病病人筛查手段。     

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??OBJECTIVE To evaluate the feasibility of relay intercropping Ophiopogonis Radix and vegetables by measuring the yield and contents of effective components and fingerprint analysis. METHODS The field capacity when relay intercropping Ophiopogonis Radix and vegetables was evaluated, taking Ophiopogonis Radix monoculture as control. The contents of major compound of Ophiopogonis Radix were measured by ultraviolet spectrophotometry and high performance liquid chromatography, and the HPLC fingerprint of Ophiopogonis Radix was established. RESULTS Relay intercropping vegetables reduced the yield of Ophiopogonis Radix to some extent, but the land equivalent ratios were all more than 1, indicating that it is advantageous to intercrop Ophiopogonis Radix and vegetables.Relay intercropping vegetables did not reduce the contents of chemical constituents in Ophiopogonis Radix significantly. The similarities of all the HPLC fingerprint chromatograms were greater than 0.990. CONCLUSION Relay intercropping Ophiopogonis Radix and vegetables is a feasible pattern to solve the contention for land between Ophiopogonis Radix and vegetables in the main producing areas of Ophiopogonis Radix, and can be applied and generalized.     

HPLC同时测定麦冬中5个皂苷成分的含量

建立测定麦冬药材中麦冬皂苷D,麦冬皂苷D', ophiopojaponin C,去乙酰基ophiopojaponin A, 3-O-α-L-鼠李糖-(1→2)-β-葡萄糖麦冬苷元5种成分的HPLC方法。采用HPLC-ELSD方法,色谱柱为Kromasil 100-5C₁₈柱(4.6 mm×250 mm,5μm);流动相为乙腈(A)-水(B)溶液,梯度洗脱0~45 min,35%~55%A,体积流量1.0 mL·min^-1;柱温35℃,漂移管温度100℃,气体流速3.0 L·min^-1;进样量15μL。结果表明5种成分均达到基线分离,各成分均有较宽的线性范围和良好的线性关系(r>0.999);回收率在95.75%~103.1%。建立的麦冬皂苷含量测定方法准确灵敏、重复性好,可应用于麦冬药材质量评价中。     

Strawberry Phytochemicals Inhibit Azoxymethane/Dextran Sodium Sulfate-Induced Colorectal Carcinogenesis in Crj: CD-1 Mice

Human and experimental colon carcinogenesis are enhanced by a pro-inflammatory microenvironment. Pharmacologically driven chemopreventive agents and dietary variables are hypothesized to have future roles in the prevention of colon cancer by targeting these processes. The current study was designed to determine the ability of dietary lyophilized strawberries to inhibit inflammation-promoted colon carcinogenesis in a preclinical animal model. Mice were given a single i.p. injection of azoxymethane (10 mg kg⁻¹ body weight). One week after injection, mice were administered 2% (w/v) dextran sodium sulfate in drinking water for seven days and then an experimental diet containing chemically characterized lyophilized strawberries for the duration of the bioassay. Mice fed control diet, or experimental diet containing 2.5%, 5.0% or 10.0% strawberries displayed tumor incidence of 100%, 64%, 75% and 44%, respectively (p < 0.05). The mechanistic studies demonstrate that strawberries reduced expression of proinflammatory mediators, suppressed nitrosative stress and decreased phosphorylation of phosphatidylinositol 3-kinase, Akt, extracellular signal-regulated kinase and nuclear factor kappa B. In conclusion, strawberries target proinflammatory mediators and oncogenic signaling for the preventive efficacies against colon carcinogenesis in mice. This works supports future development of fully characterized and precisely controlled functional foods for testing in human clinical trials for this disease.     

骨髓增殖性肿瘤治疗进展:第56届美国血液学会年会报道

近年对bcr-abl阴性的骨髓增殖性肿瘤的发病机制、诊断、风险分层及治疗等方面的研究取得了长足进展,文章就2014年第56届美国血液学会(ASH)年会上关于bcr-abl阴性的骨髓增殖性肿瘤治疗进展等内容作一介绍.