利妥昔单抗治疗难治性激素耐药型肾病综合征的疗效和安全性

目的:探讨利妥昔单抗(RTX)治疗儿童难治性激素耐药型肾病综合征(SRNS)的疗效和安全性。方法:回顾性分析2013年9月至2018年3月东部战区总医院儿科收治并接受RTX治疗的10例难治性SRNS患儿的临床资料。结果:10例患儿发病年龄(4.47±2.75)岁,男女各5例;5例(50%)肾活检为局灶节段性肾小球肾炎,...     

Casticin prevents DSS induced ulcerative colitis in mice through inhibitions of NF‐κB pathway and ROS signaling

Casticin, a compound purified from the Chinese herb Viticis Fructus, has been proven effective in preventing tumor progression in previous studies. Ulcerative colitis (UC) is a common inflammatory bowel disease that affects millions of people worldwide, but no effective and safe drugs are available. In this study, we aimed to study how did casticin affect UC by evaluating its effects on dextran sulfate sodium (DSS)‐induced colitis in mice. Our data suggested that casticin attenuated body weight loss, colon length shortening, and pathological damage in the colon of DSS‐treated mice. Casticin decreased reactive oxygen species level and chemocytokines (IL‐1β, IL‐6, TNF‐α) productions in colon tissue. The decreased reactive oxygen species level and suppressed proinflammatory cytokines productions were also confirmed in casticin‐treated LPS‐stimulated RAW264.7 cells and hydrogen peroxide‐treated CACO‐2 cells in vitro. Mechanistically, casticin treatment prevented the profound activation of AKT signaling caused by DSS administration. And casticin inhibited the productions of proinflammatory chemocytokines through downregulating AKT/NF‐κB pathway in macrophages. Meanwhile, data revealed that casticin increased expressions of endogenous antioxidants peroxiredoxin 3 and MnSOD were through activation in FOXO3α signaling by downregulating AKT signaling in colon epithelium cells. Our findings demonstrated that casticin alleviated DSS‐induced UC by increasing the antioxidant enzyme peroxiredoxin 3 and MnSOD expressions, and decreasing the production of proinflammatory chemocytokines through inhibition of AKT signaling.     

内蒙古大学生学习倦怠分析

目的:了解内蒙古大学生学习倦怠的现状,为制定干预措施提供科学依据.方法:以<大学生学习倦怠问卷>为研究工具,对内蒙古自治区6所高校的438名大学生继续调查.结果:内蒙古大学生的学习倦怠程度较高;在行为不当上随着年级的增高程度减低;在情绪低落上,年级、专业和家庭所在地有交互作用.结论:内蒙古大学生的学习倦怠程度较高,由此我们可以看出地处西部欠发达地区的内蒙古自治区的教育水平有待加强.     

淫羊藿甙对OVX大鼠成骨细胞Smad4 mRNA的作用

目的：探讨淫羊藿甙（icariin）抑制骨质疏松的细胞内信号机制。方法：36只雌性Wistar大鼠随机分成3组：OVX（双侧卵巢切除）；OVX-I （OVX并注射icariin）；OVX-E（OVX并注射雌二醇）。术后4，6，8周时检测血清碱性磷酸酶（AIJP）的含量，并于术后8周时测体质量，取股骨干分离培养成骨细胞，用RT-PCR检测各组成骨细胞Smad4的mRNA含量。结果：（1）Icariin可以控制OVX大鼠体质量增加。（2）术后4，6周OVX-I和OVX-E组血清ALP值升高差异无统计学意义；OVX组ALP升高值与其他2组间差异有统计学意义（P〈0．01）；术后8周OVX、OVX-I和OVX-E组血清ALP值依次降低，差异有统计学意义（P〈0．01）。（3）术后8周，RT-PCR显示OVX、OVX-I和OVX-E组Smad4的mRNA含量依次增高，以OVX-E组最多。结论：淫羊霍甙可抑制OVX大鼠血清ALP水平的升高，且可能通过提高Smad4 mRNA抑制OVX大鼠体质量的增加。     

高效液相色谱法测定当归补血汤分煎液与合煎液中阿魏酸含量

目的；比较当归补血汤（当归，黄芪）分煎液与合煎液中阿魏酸含量。方法：采用HypersilC18，以甲醇-0.05%乙酸（45：55）为流动相，在324nm波长处测定。结果：分煎液阿魏液平均回收率为100.86%,RSD=2.33%。合煎液阿魏酸平均回收率为101.37%,RSD=1.52%。结论：合煎液中阿魏酸含量高于分煎液。     

101例超声引导下涎腺活检价值的探讨

目的：探讨超声引导下涎腺活检对涎腺肿块定性和分类诊断的价值。方法：101例患者行超声引导下涎腺活检。结果：经术后组织学诊断证实,活检判定良恶性准确率为95．6％,良性病变敏感性100％,特异性94％,恶性病变敏感性85．7％,特异性100％。活检明确组织学分类的准确率为91．2％,良性病变敏感性95．7％,特异性90％,恶性病变敏感性81％,特异性100％。33例未手术的良性非肿瘤病变患者,经相应治疗,病灶均缩小或无增大。运用logistic回归分析检验结果显示活检病理分类诊断准确性与病变良恶性和组织条数有关。结论：超声引导下涎腺活检诊断涎腺病变敏感、可靠．可提供准确的分类诊断。     

双标记流式细胞术定量分析5-FU诱导胃癌细胞早期凋亡

目的 以Annexin V-FTTC/PI双标记流式细胞术检测5－FU诱导胃癌细胞株SCG7901早期凋亡。方法 250、125、50以及25mg/L不同浓度5－FU处理SCG7901胃癌细胞0、6、12、18、24、30h,Annexin V-FTTC/PI双标记流式细胞术检测肿瘤细胞凋亡。结果 早期（0－24h)瘤细胞凋亡比例随5－FU作用剂量增加和时间延长而显著提高（P＜0.01)；后期（24-30h)瘤细胞以坏死增加为主（P＜0.01)而凋亡比例反而降低。结论 5－FU诱导细胞凋亡呈时间以及剂量依赖关系。Annexin V/PI双标记法可以清楚区分正常、坏死、机械损伤以及凋亡细胞群落，是定量分析早期细胞凋亡的准确方法。     

上海部分地铁站空调冷却塔水军团菌污染状况调查

[目的 ]了解上海部分地铁站军团菌污染状况。 [方法 ]应用优化检验技术对 2 0 0 1年 3～ 11月上海部分地铁站的 10 2件空调冷却塔水样进行军团菌的分离培养与鉴定。 [结果 ] 10 2件样品中分离出 46株军团菌 ,污染率为45 10 %。 [结论 ]上海部分地铁站军团菌污染情况较为严重 ,需引起重视以防止军团菌的爆发流行     

Study on Photocatalytic Performance of Ag/TiO2 Modified Cement Mortar

In this paper, Ag-TiO₂ photocatalysts with different Ag contents (1 mol%–5 mol%) were prepared and applied to cement mortar. The photocatalytic performance of Ag-TiO₂ and photocatalytic cement mortar under UV light and simulated solar light was evaluated. The results showed that Ag loading on the surface of TiO₂ could reduce its band gap width and increase its absorbance in the visible region, and 2% Ag-TiO₂ had the highest photocatalytic activity under UV light, the degradation rate of methyl orange (MO) was 95.5% at 30 min, and the first-order reaction constant k was 0.0980 min⁻¹, which was 61.7% higher than that of TiO₂, and 5% Ag-TiO₂ had the highest photocatalytic activity under solar light, the degradation rate of methylene blue (MB) was 69.8% at 40 min, and the first-order reaction constant k was 0.0294 min⁻¹, which was 90.9% higher than that of TiO₂. The photocatalytic mortar prepared by the spraying method has high photocatalytic performance, The MO degradation rate of sample S2 under UV light was 87.5% after 120 min, MB degradation rate of sample S5 under solar light was 75.4% after 120 min. The photocatalytic reaction conforms to the zero-order reaction kinetics, which was 1.5 times–3.3 times higher than that of the mixed samples and has no effect on the mechanical properties of mortar.