16 research outputs found

    针刺调节BDNF/TrkB信号通路改善中枢神经系统疾病的研究进展

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    BDNF/TrkB信号通路作为神经元生长、发育和突触可塑性的关键调节器,广泛参与中枢神经系统疾病的发生发展,如缺血性脑卒中、阿尔茨海默病、帕金森病和脊髓损伤等。研究表明针刺能调节BDNF/TrkB信号通路的活性,对以上疾病具有显著的治疗潜力,其作用机制与参与突触结构重塑,抑制神经细胞凋亡,促进神经发生和突触再生等有关。本文综述了BDNF/TrkB相关信号通路在中枢神经系统疾病中的作用以及针刺对该通路的调控机制,以期为临床治疗提供新思路。未来研究应深入探究针刺对BDNF/TrkB信号通路的精准调控,以开发更高效安全的治疗策略

    基于Bayes时空模型分析HIV/AIDS晚发现的时空分布特征及其影响因素

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    目的旨在分析兰州市HIV/AIDS晚发现的时空聚集性特征及相关影响因素,明确兰州市HIV/AIDS晚发现高风险地区和时间趋势,为兰州市因地制宜地制定HIV/AIDS防治策略措施提供参考依据。方法选择兰州市2011-2018年间新报告的成年HIV/AIDS病例作为研究对象,研究中所需的数据资料来自兰州市疾病预防控制中心和兰州市统计年鉴。采用Bayes时空模型分析HIV/AIDS晚发现相对风险(RR)的时空分布特征及其影响因素。结果2011-2018年间兰州市新报告的HIV/AIDS病例共计1 984例,其中HIV/AIDS晚发现者有982例(49.5%),平均年龄为39.67岁,男性占90.9%。老年人和女性HIV/AIDS病例中晚发现的比例更高;城关区(51.1%)、安宁区(50.3%)和榆中县(51.9%)具有高于平均水平的HIV/AIDS晚发现比例;2011-2018年间兰州市总体的晚发现比例呈波动上升趋势。Bayes时空模型分析结果显示,兰州市HIV/AIDS晚发现风险在2011-2015年间波动变化,而在2015年后迅速上升,其RR(95%CI)从1.01(0.84,1.23)上升到1.11(0.77,1.97);红古区和三个县的晚发现风险变化趋势与兰州市的总体变化趋势相似,而城关区和七里河区的晚发现风险呈下降趋势;晚发现相对风险大于1的区县包括:永登县(RR=1.07,95%CI:0.55,1.96)、西固区(RR=1.04,95%CI:0.67,1.49)、城关区(RR=2.41,95%CI:0.85,6.16)和七里河区(RR=2.03,95%CI:1.10,3.27)。冷热点分析结果显示城关区和七里河区为热点区。影响因素分析结果显示,随着人均GDP(RR=0.65,95%CI:0.35,0.90)和HIV/AIDS病例中的男性比例(RR=0.53,95%CI:0.19,0.92)的增高,HIV/AIDS晚发现的相对风险越低;而人口密度(RR=1.35,95%CI:1.01,1.81)越大,晚发现风险越高。结论兰州市的HIV/AIDS晚发现风险呈上升趋势,并且存在明显的地区差异特征;人均GDP、HIV/AIDS中男性比例和人口密度是HIV/AIDS晚发现的影响因素。因此,对于晚发现风险高和存在相关风险因素的区县,应重视并制定有针对性的HIV筛查和防治服务,降低HIV/AIDS晚发现比例和风险

    Bovine immune colostral antibody against verotoxin 2 derived from Escherichia coli O157:H7-resistance to proteases and effects on verotoxin 2 in small intestine of beagle dogs

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    Resistance to intestinal proteases and efficacy against verotoxin (VT) 2 of a colostral antibody administered orally via catheter were investigated in beagle dogs. Bovine colostral antibody remained in the small intestine for 2 hours, whereas little serum antibody remained at 1.5 hours after administration. The bovine colostral antibody was not inactivated by proteases in the small intestine. Furthermore, the antibody activity of S-IgA did not change until 2 hours after administration; however, the activity of IgG and IgM antibodies decreased by two-thirds and two-fifths at 2 hours after administration, respectively. Seven beagle dogs inoculated with Escherichia coli (E. coli) O157:H7 producing VT2 were administered bovine colostral antibody or bovine colostral whey without antibody. With administration of bovine colostral whey without antibody, the amount of VT2 in feces decreased gradually after administration and increased again at 5 days after inoculation, while bovine colostral antibody significantly reduced the amount of VT2 in feces the day after administration. In addition, 9 beagle dogs were administered bovine colostral antibody, bovine plasma antibody or saline. The amount of VT2 in feces also significantly reduced rapidly after administration of bovine colostral antibody than administration of bovine plasma antibody or saline

    Fabrication of triblock liquid crystal elastomer by holography

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