藻酸双酯钠和阿莫地平对狗肾血流动力学影响的对比研究

本文对藻酸双酯钠(PSS)和钙拮抗剂阿莫地平的肾血流动力学进行了对比研究。在活体去神经狗肾脏动脉注射PSS和阿莫地平,观察肾小球滤过率、肾血流、Na+、K+排泄率等9个肾动力指标。结果表明:PSS与阿莫地平均可明显促进肾血流,使尿量增加(P<0.01)。其它各肾血流动力学主要指标与阿莫地平相似但作用较弱,维持时间较短,显示较温和的特征,这对于扩展PSS的临床应用范围具有重要价值。

青岛文昌鱼LIM类基因Bblim同源框区的cDNA克隆、序列分析及其在胚胎发育中的表达

不同卵裂球发育命运的特化、亦即胚胎细胞的分化是动物胚胎发育的重要特征。多数胚胎细胞尽管形态特征完全一致，却具有不同的发育命运。预示着：在这些细胞中存在有决定发育命运的因素－决定子。本工作克隆了青岛文昌鱼LIM类同源框基因的同源框片段。目的在于揭示决定子的分子本质。青岛近海采集性成熟的成年青岛文昌鱼，收集未受精卵、受精卵以及各处不同时期的胚胎，液氮冻存备用。分别制备总RNA。根据其它动物LIM类同源框基因的序列设计引物（Tab.1)，连续进行RT－PCR和PCR两次扩增。其中，原肠胚来源的第二次PCR产物经电泳鉴定（Fig.1)后，酶切、克隆入质粒、测序、将该片段所在的基因命名为Bblim基因，该自然称为Bblim同源框。根据Bblim基因同源框的核苷酸序列推导出其相应的氨基酸序列（Fig.2)，与其它LIM类同源框基因进行比较（Fig.3)后，认为：Bblim基因可归入lim3类基因。比较胚胎发育各个不同时期第二次PCR产物的含量－即Bblim基因的转录（Fig.4)，提示：该基因可能在受精后和原肠成形前后两个发育阶段起作用。此外，Bblim基因的同源域与海鞘Hrlim的同源域高度同源，表达模式也相似，提示，Bblim基因可能是Hrlim基因在文昌鱼中的类似物。

海藻硫酸多糖对正常及免疫低下小鼠的免疫调节作用

海藻硫酸多糖可增强正常小鼠体内外淋巴细胞增殖反应。促进小鼠体内淋巴细胞产生白介素２．巨噬细胞产生白介素１．对正常小鼠自然杀伤细胞活性和溶血素生成等也有较好的促进作用。对由环磷酰胺所致免疫低下小鼠的淋巴细胞增殖反应。迟发型超敏反应及溶血素生成有较好的恢复作用。

N-吡啶乙酰基-β-D-葡萄糖胺的合成

以葡萄糖胺为原料 ,与氯乙酰氯反应得到 N-氯乙酰基 - D-葡萄糖胺 ,在吡啶的作用下合成了 N-吡啶乙酰基 - β- D-葡萄糖胺——一种季胺盐衍生物 ,产物由 IR、NMR、无素分析等确证了其结构。

脱羧法测定硫酸多糖911的含量

该文采用氧瓶燃烧法测定了硫酸多糖 911的硫 ( S% )含量 ,根据所测硫含量确定了硫酸多糖 911的平均单体式量 ,然后在此基础上应用脱羧法对硫酸多糖 911样品的含量进行了测定。

羧甲基壳聚糖碱式铝盐的制备

6- Ο-羧甲基壳聚糖钠盐的水溶液与 Al( OH) 2 Cl反应制备了羧甲基壳聚糖的碱式铝盐 ,IR和元素分析对其结构进行了表征。

Effect of polysaccharide sulfate 916 on the production of nitric oxide in ECV3 04 cells induced by cytokines and H_2O_2

To investigate the effect of polysaccharide sulfate 916 (PS916) on the productio n of nitric oxide (NO) in ECV304 cells induced by tumor necrosis factor α (TNF α), interleukin 1β (IL 1β) and H 2O 2 in vitro Methods Production of NO in ECV304 cells was measured by the Griess method and the proli feration of cells was tested by the MTT method The activity of NO synthase was detected spectrophotometrically Results Production of NO in ECV304 cells decreased after treatment with 40?ng/ml IL 1 β and 40?ng/ml TNFα, but increased in the presence of H 2O 2 0 1?mmol/L PS916 significantly enhanced NO production in ECV304 cells in a dose depende nt manner in the TNFα and IL 1β treated groups and decreased it in the H 2O 2 treated group Proliferation of ECV304 cells was inhibited by TNFα and H 2O 2 and no effect was found in the IL 1β treated group PS916 increased the proliferation of cells treated with TNFα and H 2O 2 dose dependently In vitro, PS916 has no effect on the activity of NO synthase Conclusion PS916 has a protective effect on ECV304 cells exposed to IL 1β, TNFα and H 2 O 2

Effect of polysaccharide sulfate 916 on the production of nitric oxide in ECV3 04 cells induced by cytokines and H2O2

To investigate the effect of polysaccharide sulfate 916 (PS916) on the productio n of nitric oxide (NO) in ECV304 cells induced by tumor necrosis factor α (TNF α), interleukin 1β (IL 1β) and H 2O 2 in vitro Methods Production of NO in ECV304 cells was measured by the Griess method and the proli feration of cells was tested by the MTT method The activity of NO synthase was detected spectrophotometrically Results Production of NO in ECV304 cells decreased after treatment with 40?ng/ml IL 1 β and 40?ng/ml TNFα, but increased in the presence of H 2O 2 0 1?mmol/L PS916 significantly enhanced NO production in ECV304 cells in a dose depende nt manner in the TNFα and IL 1β treated groups and decreased it in the H 2O 2 treated group Proliferation of ECV304 cells was inhibited by TNFα and H 2O 2 and no effect was found in the IL 1β treated group PS916 increased the proliferation of cells treated with TNFα and H 2O 2 dose dependently In vitro, PS916 has no effect on the activity of NO synthase Conclusion PS916 has a protective effect on ECV304 cells exposed to IL 1β, TNFα and H 2 O 2