唐山地区药用植物资源及其可持续开发利用研究

目的:调查唐山地区药用植物资源的种类与分布,为药用植物资源的开发利用提供依据。方法:深入各代表性地域进行药用植物资源调查,采集标本,鉴定标本,考证文献资料,调查在民间的应用等。结果:唐山地区有药用植物113科、301属、382种,其中蕨类植物7科8属11种;裸子植物5科6属8种;单子叶植物9科36属42种。双子叶植物92科251属321种。结论:唐山地区药用植物资源丰富,具有较好的开发利用前景。     

五子降糖方对T2DM模型大鼠骨骼肌GLUT4蛋白表达的影响

目的: 观察五子降糖方对2型糖尿病模型大鼠血糖及骨骼肌葡萄糖转运蛋白4(GLUT4)表达的影响,初步探讨其改善糖代谢的分子机制。 方法: 采用高脂饮食喂养6周联合ip小剂量链脲佐菌素(STZ)的方法建立2型糖尿病大鼠模型,随机分为模型组、二甲双胍(0.1 g·kg^-1)组、五子降糖方低、中、高剂量组(3.5,7.0,14.0 g·kg^-1),另设正常组,各组大鼠分别ig相应的药物,容量为7.5 mL·kg^-1。模型组及正常组ig纯净水;二甲双胍组ig盐酸二甲双胍混悬液;五子降糖方低、中、高剂量组ig五子降糖方混悬液,干预6周。分别在ig前、ig后2周、4周、6周测空腹血糖及餐后2 h血糖。ig后6周处死大鼠,取其左后肢大腿股直肌组织,检测GLUT4蛋白的表达。 结果: 与正常组比较,模型组T2DM大鼠空腹和餐后2 h血糖升高,骨骼肌GLUT4蛋白表达水平降低,差异均具有统计学意义(P<0.05);五子降糖方能够降低T2DM大鼠空腹血糖及餐后2 h血糖水平,提高T2DM大鼠骨骼肌GLUT4蛋白表达水平,差异均具有统计学意义(P<0.05)。 结论: 五子降糖方可降低T2DM模型大鼠空腹及餐后2 h血糖,作用机制可能与提高骨骼肌GLUT4蛋白表达水平有关。     

通莲汤对胃癌MGC803细胞周期及NF-κBs信号通路的影响

目的: 研究通莲汤对胃癌MGC803细胞形态、生长周期的调节作用及细胞核转录因子κB(NF-κB)信号通路的影响,以探讨该方抑制胃癌细胞增殖的机制。 方法: 将MGC803细胞以1×10⁴个细胞/孔的密度接种于96孔细胞培养板,以含5%胎牛血清DMEM培养液培养,37 ℃,5%饱和湿度的CO₂培养箱孵育,细胞贴壁24 h,分别加入浓度为25~800 mg·L^-1倍比梯度的通莲汤提取液,以10~160 mg·L^-1倍比浓度的氟脲嘧啶为阳性对照组,孵育48 h后,倒置显微镜下观察细胞形态,MTT比色法检测细胞增殖变化,曲线拟合法计算通莲汤和氟脲嘧啶50%抑制浓度(IC₅₀);以两者48 h IC₅₀浓度处理细胞48 h,流式细胞技术(FCM)测定细胞周期,Western blot法测定细胞IκB激酶β(IKKβ),NF-κB,phosph-NF-κB蛋白水平。 结果: 通莲汤和氟脲嘧啶48 h IC₅₀值分别为192.74 mg·L^-1,23.61 mg·L^-1;与空白对照组相比,通莲汤显著影响MGC803细胞周期中G₂期,氟脲嘧啶显著影响MGC803细胞周期中G₁期(P<0.05);通莲汤和氟脲嘧啶均能显著抑制IKKβ与NF-κB的蛋白表达。 结论: 通莲汤抑制MGC803细胞生长与抑制细胞于G₂期,下调NF-κB通路中IKKβ,NF-κB蛋白的表达有关。     

Acute respiratory distress during Caesarean section under spinal anaesthesia A probable case of anaphylactoid reaction to Syntocinon

A case of life-threatening respiratory distress during a Caesarean section under spinal anaesthesia is reported. Possible causes of the event including anaphylactoid reactions and the methods of their diagnosis are discussed. The most likely cause of the episode was felt to be an anaphylactoid reaction to Syntocinon.     

低频率抗Mur抗体引起溶血性输血反应的调查研究

目的研究抗Mur抗体血型血清学特征，调查其在输血医学中临床意义。方法对2例患者的血清，与已知血型的试剂红细胞和4个已知Mur抗原，在盐水介质、低离子间接抗球蛋白介质，分析鉴定出其抗体的特异性。结果这2例患者与已知血型的试剂红细胞在多种反应介质中的反应结果显示患者血清中含有抗Mur抗体，患者血清与4个已知Mur抗原的反应证实该例抗体只与Mur抗原反应。结论该例同种抗体为特异性抗Mur抗体，在临床会引起溶血性输血反应。在东方人群中Mihenberger血型抗体常规筛选鉴定值得探讨。     

基于1H-NMR植物代谢组学技术分析青海产区枸杞子的化学特征

目的:采用核磁共振氢谱(~1H-NMR)植物代谢组学技术比较青海产区枸杞子与其他产区(宁夏、甘肃、新疆、内蒙古)枸杞子的化学成分差异。方法:收集5个产区共97份枸杞子样本,其中青海61个样本,采用50%甲醇提取,检测~1H-NMR图谱,结合多元统计分析,对比青海产区枸杞子与其他产区枸杞子的化学差异性,并对各产区样本的枸杞多糖进行含量测定(以无水葡萄糖计),检测波长490 nm。结果:枸杞子的~1H-NMR图谱共检测到32个化学成分,多元统计分析表明青海产区枸杞子与其他产区样本相比,无明显分离趋势;青海产区枸杞子与宁夏产区相比,以及青海省6个不同地区的枸杞子相比,重叠样品较多,均不能显著分开。相似度结果表明,大多数样品的相似度0.85;化合物的单变量分析结果显示,除了蔗糖、葡萄糖、脯氨酸等个别代谢物在各产区样本中存在显著差异外,其余代谢物在各产区样品中的含量分布基本一致。青海与其他产区样本中枸杞多糖含量无显著性差异,且枸杞多糖含量与~1H-NMR指认的小分子化合物的相关系数处于-0.2～0.4。结论:采用~1HNMR植物代谢组学技术从整体化学组成上分析了青海产区枸杞子的化学特征,并结合枸杞多糖含量测定,显示青海产区枸杞子与其他产区枸杞子的化学差异较小。建立的基于~1H-NMR的枸杞子质量评价方法可为其质控水平提升及种植产区选择提供科学依据。     

Induction of proliferation of B prolymphocytic leukemia cells by phorbol ester and native or recombinant interferon-gamma

Phorbol ester phorbol myristate acetate (PMA) induces proliferation in nonmalignant human B cells and B cells from a patient with B prolymphocytic leukemia (B-PLL). Mitogen-free T cell-derived conditioned medium acts synergistically with PMA in inducing proliferation of B-PLL cells but does not enhance the PMA-stimulated outgrowth of nonmalignant B cells. Interleukin 2 (IL-2) has no effect on the outgrowth of B-PLL cells, and monoclonal antibodies against the IL-2 receptor do not influence the response to PMA and conditioned medium. Recombinant interferon-gamma (IFN-gamma), in contrast, is a potent enhancer of PMA-induced proliferation of B-PLL cells. With gel filtration techniques and with the use of anti-IFN-gamma antibodies, it is shown that IFN-gamma in the conditioned medium is responsible for the observed increase in B-PLL cell proliferation. Preincubation of B- PLL cells with IFN-gamma induces responsiveness to PMA, whereas IFN- gamma alone had no effect on these cells when pretreated with PMA. The combined data show that, in the presence of PMA, native and recombinant IFN-gamma are growth factors for B cells from a B-PLL patient and that IL-2 is not involved in this process.     

Delivery of a hammerhead ribozyme specifically down-regulates the production of fibrillin-1 by cultured dermal fibroblasts

The hammerhead ribozyme is a small catalytic RNA molecule. Potential hammerhead ribozymes that possess a catalytic domain and flanking sequence complementary to a target mRNA can cleave in trans at a putative cleavage site within the target molecule. We have investigated the potential of hammerhead ribozymes to down-regulate the product of the fibrillin-1 gene (FBN1). Fibrillin is a 347 kDa glycoprotein that is a major constituent of the elastin-associated microfibrils. Mutations in the FBN1 gene are responsible for Marfan syndrome (MFS), a common systemic disorder of the connective tissue. Many FBN1 mutations responsible for MFS appear to act in a dominant-negative fashion, raising the possibility that reduction of the amount of product from the mutant FBN1 allele might be a valid therapeutic approach for MFS. A trans-acting hammerhead ribozyme (FBN1-RZ1) targeted to the 5' end of the human FBN1 mRNA has been designed and synthesized, and shown to cleave its target efficiently in vitro. FBN1-RZ1 cleavage is magnesium dependent and efficient at both 37 and 50 degrees C. Delivery of the FBN1-RZ1 ribozyme into cultured dermal fibroblasts, by receptor- mediated endocytosis of a ribozyme-transferrin-polylysine complex, specifically reduces both cellular FBN1 mRNA and the deposition of fibrillin in the extracellular matrix. These results suggest that the use of hammerhead ribozymes is a valid approach to the study of fibrillin gene expression and possibly to the development of a therapeutic approach to MFS.      

新疆南疆三地州卫生人力资源配置适宜性研究

新疆卫生人力资源存在着数量不足、素质不高、结构不合理及配置不平衡等问题,尤其新疆南疆三地州卫生人力资源的匮乏急待解决。根据卫生事业发展需与国民经济发展相协调的实际,满足全体人民基本卫生服务需要的目标,按照基本卫生服务均等化原则,建议增加当地卫生人力资源数量、提高基本卫生人力素质与能力、不断调整优化卫生人力资源结构和布局等。