CD44基因多态性与宫颈癌及非小细胞肺癌的相关性

背景与目的：CD44分子是众多肿瘤细胞的标志分子，其表达水平与肿瘤细胞的恶性程度有关。该研究探讨CD44基因中的单核苷酸多态性（single nucleotide polymorphism，SNP）位点与云南汉族人群宫颈癌和非小细胞肺癌（nonsmall cell lung cancer，NSCLC）易感性的相关性。方法：选取了CD44基因中的两个SNP位点rs13347和rs8193，采用TagMan基因分型的方法，分析这两个多态性位点在497例宫颈癌患者和500例健康对照个体以及483例NSCLC患者和471例健康对照个体中的分布特征，并分析CD44基因中的多态性位点与云南汉族人群宫颈癌和NSCLC的相关性。结果：rs13347和rs8193位点等位基因和基因型在宫颈癌组和对照组中的分布频率的差异无统计学意义（P>0.05）。而在NSCLC组和对照组的比较中：rs13347和rs8193位点等位基因在NSCLC组和对照组中的分布频率的差异有统计学意义（P=0.020和P=0.004）；这两个位点基因型在NSCLC组和对照组中分布频率的差异有统计学意义（P=0.027和P=0.020）；其中rs13347位点等位基因C在NSCLC组中的分布频率显著高于对照组，可能是NSCLC发生的风险因素（OR=1.250，95% CI：1.035～1.509），rs8193位点等位基因C在对照组中的分布频率显著高于NSCLC组，可能是NSCLC发生的保护性因素（OR=0.768，95%CI：0.641～0.921）。单倍型分析结果显示，rs13347C-rs8193T和rs13347T-rs8193C在NSCLC组和对照组中的分布频率差异有统计学意义（P=0.003和0.022）；该结果说明单倍型rs13347C-rs8193T可能是云南汉族人群NSCLC发生的风险性因素（OR=1.316，95%CI：1.096～1.579）。结论：CD44基因中的两个SNP位点rs13347和rs8193可能与云南汉族人群宫颈癌发病风险无关，而可能与云南汉族人群NSCLC具有相关性。     

T1~T2期乳腺癌保乳术后化疗后程同步大分割放疗前瞻性Ⅰ期临床研究

目的 前瞻性评估T1~T2期乳腺癌保乳术后化疗后程大分割放疗的不良反应和耐受性，以及在缩短治疗时间、减轻患者经济负担等方面的价值。方法 共入组20例T1~T2期乳腺癌保乳术后患者，所有患者于末次多西他赛化疗前开始大分割放疗。观察急性放射反应、治疗完成率及无病生存率、住院时间及住院费用等。结果 治疗完成率100%。主要不良反应为血液学毒性（白细胞减少）及皮肤反应，患者均可耐受。中位随访时间为30.1个月，随访率100%。美容效果良好率100%。平均总治疗时间为4周，总住院治疗费用节省约1万元。21个月无病生存率为100%。结论 T1~T2期乳腺癌保乳术后可耐受同步大分割放化疗，局部控制好，美容效果佳，且具有较高的卫生经济学价值。     

清前方对实验性慢性非细菌性前列腺炎的作用

目的 观察清前方对大鼠慢性非细菌性前列腺炎的作用。方法 采用向大鼠前列腺内注入1％角叉菜胶生理盐水的方法，建立实验性非细菌性前列腺炎模型，并将实验大鼠随机分为4组，分别给予相应剂量的蒸馏水（A组和B组）、清前方（C组）或舍尼通（D组）混悬液，观察清前方对该炎症模型大鼠体重增长变化、前列腺脏／体比值及病理学改变的影响。结果 清前方（2．5g／kg·d）组炎症模型动物体重增长回升，前列腺脏／体比值下降，前列腺平滑肌增殖受到抑制，局部病理性瘀血状态得以改善。结论 清前方可望用于治疗慢性非细菌性前列腺炎。     

丹参酮ⅡA通过抑制HDAC3影响巨噬细胞极化的作用研究

目的探讨丹参酮ⅡA(TanⅡA)通过抑制组蛋白去乙酰化酶3(HDAC3)影响巨噬细胞极化的作用。方法应用中药系统药理学数据库与分析平台(TCMSP)筛选TanⅡA药效靶点和动脉粥样硬化作用靶点,并将二者的交集基因进行KEGG通路分析,采用Cytoscape 3.7.1软件对主要交集基因-信号通路进行可视化分析。选用THP-1单核细胞株经佛波醇12-十四酸酯13-乙酸酯(PMA)诱导为贴壁的巨噬细胞后,分为M0组、氧化型低密度脂蛋白(ox-LDL)组、TanⅡA+ox-LDL组及ox-LDL+HDAC3 siRNA组。采用流式细胞术、免疫荧光实验及qRT-PCR技术检测TanⅡA对ox-LDL诱导的巨噬细胞极化方向的改变及HDAC3 mRNA表达水平的变化。结果生物信息学分析得到TanⅡA药效靶点和动脉粥样硬化作用靶点有23个交集基因,选取排序靠前的20条信号通路进行可视化分析,发现主要富集于动脉粥样硬化、流体剪切力和TNF信号通路等。其中,JUN、FOS、RELA、NFKBIA四个交集基因参与巨噬细胞极化的信号通路调控。流式细胞术、免疫荧光实验及qRT-PCR结果显示ox-LDL可诱导M0巨噬细胞CCR7和CCL2表达显著升高;与ox-LDL组相比,TanⅡA预处理的M0巨噬细胞经ox-LDL诱导后HDAC3、CCR7及CCL2 mRNA表达均下降,和ox-LDL+HDAC3 siRNA组结果一致。结论 TanⅡA能有效地阻止ox-LDL诱导巨噬细胞往M1方向极化,其机制可能是通过调控巨噬细胞HDAC3表达介导的。     

The effects of Sarconesiopsis magellanica larvae (Diptera: Calliphoridae) excretions and secretions on fibroblasts

Sarconesiopsis magellanica is a necrophagous blowfly which is relevant in both forensic and medical sciences. Previous studies regarding this species have led to understanding life-cycle, population and reproduction parameters, as well as identifying and characterising proteolytic enzymes derived from larval excretions and secretions (ES). As other studies have shown that ES proteolytic activity plays a significant role in wound healing and fibroblasts play a relevant role in granulation tissue formation during such healing, the present study was aimed at analysing the biological effect of S. magellanica larval ES on fibroblasts. ES were obtained from third-instar larvae and added to fibroblast cells at three concentrations (10, 5 and 1 μg/mL) to evaluate their behaviour. MTT assays were used for analysing cell proliferation and viability, whilst cell adhesion was measured by optical density with 10% SDS. Fibroblast migration and morphology was recorded by microscopic observation. ES did not affect fibroblast viability and induced an increase in cell proliferation; cell adhesion became reduced, whilst cell migration through extracellular matrix increased. ES also induced a decreased cell surface and morphological alterations. Changes in all the above-mentioned parameters were reduced when ES were incubated at 60 °C, probably due to protease denaturation. These results suggested that the proteases contained in S. magellanica larval ES contributed towards granulation tissue formation, increased cell migration and promoted cell proliferation. All these data support carrying out further experiments aimed at validating S. magellanica usefulness in larval therapy.     

Molecular dynamics simulations of the mechanical behavior of alumina coated aluminum nanowires under tension and compression

For materials with high oxygen affinity, oxide layers will significantly change the material properties. This is of particular importance for aluminum nanowires which have many applications because of their ultrahigh strengths. Recent studies show that thin amorphous oxide shell layers on aluminum surfaces significantly change the responses of the material. However, the relations between the thickness of the oxidized layer, the strain rate and the mechanical response of nanowires to compression and tension have not been investigated intensively. In this study, we use a ReaxFF potential to analyze the influences of oxide shell layers on the material responses of the nanowires under uniaxial tension and compression at different strain rates. The Al–O interface leads to an increased defect nucleation rate at the oxide interface preventing localized deformation. During tension, we observe a reorganization of the structure of the oxide layer leading to bond healing and preventing fracture. While ductility is increasing with coating thickness during tension, the thickness of the coating is less decisive during compression.

Alumina coatings increase the ductility of aluminum nanowires by reorganization of the Al–O layer and stabilization of bonds.     

Toughening of POSS–MPS composites with low dielectric constant prepared with structure controllable micro/mesoporous nanoparticles

In this work, we developed a modified calcination and extraction method to obtain controllable micro/mesoporous nanoparticle samples POSS–MPS, which were synthesized through glycidyl polyhedral oligomeric silsesquioxane (G-POSS) grafting with aminopropyl-functionalized mesoporous silica (AP-MPS). The POSS–MPS was introduced into the cyanate ester (CE) matrix to optimize the dielectric properties and enhance the toughness of the POSS–MPS/CE nanocomposite. The structure of the hybrid was characterized by FTIR and SEM. The dispersion properties, mechanical properties, dielectric properties and thermal performance were also studied. The results showed that both the C-POSS–MPS and E-POSS–MPS uniformly distribute in the CE matrix with the content of 0.5–4 wt%. The impact strength increased 52% and 60% separately with 2 wt% C-POSS–MPS and E-POSS–MPS addition respectively. The introduction of E-POSS–MPS particles can significantly decrease the dielectric loss value of the POSS–MPS/CE composites to 0.00498, which is of potential in wave transparent composites and structures.

A promising method to improve the performance of CE composites via combining advantages of POSS and MPS.     

芎麻滴丸对血管性认知障碍大鼠社交行为的影响

目的 观察双侧颈总动脉结扎致血管性认知障碍大鼠社交行为的变化,探讨芎麻滴丸对其干预作用。方法 采用永久性结扎双侧颈总动脉法制备血管性认知障碍模型。实验大鼠随机分为假手术组（生理盐水10 mL·kg^-1）,模型组（生理盐水10 mL·kg^-1）,芎麻滴丸高剂量组（生药1.5 g·kg^-1）,芎麻滴丸低剂量组（生药0.75 g·kg^-1）。模型制备第28,42天采用Morris水迷宫对大鼠的学习记忆能力进行测试;模型制备第7,14,28,42天用社交行为仪检测大鼠社交能力的变化。结果 模型制备第7,14天大鼠社交行为无明显变化,模型制备第28天和第42天,模型组大鼠持续接触时间减少（P<0.05）;模型制备第42天,模型组大鼠接触次数减少,逃避潜伏期显著增加,穿越平台次数显著减少（P<0.01）。与模型组大鼠相比,模型制备第28天,芎麻滴丸高剂量组大鼠接触次数显著增加（P<0.05）;芎麻滴丸高、低剂量组大鼠持续接触时间显著增加（P<0.05或<0.01）;模型制备第42天,芎麻滴丸低剂量组大鼠接触次数和持续接触时间增加（P<0.05）,芎麻滴丸高、低剂量组大鼠逃避潜伏期显著减少（P<0.01）。结论 模型制备第42天大鼠出现学习记忆障碍;模型组大鼠第28天大鼠开始出现社交行为障碍,经芎麻滴丸干预后,接触时间和接触次数增加,即可认为其有效缓解由双侧颈总动脉结扎造成的社交能力障碍,且低剂量效果优于高剂量。     

套索回归模型在中医临床研究数据的统计应用与R语言实践

目的：构建简洁且易于解释的模型,为同类研究提高模型预测的准确率提供参考。方法：从国家自然科学基金项目在研课题(81673904)中选取200例肺纤维化合并心力衰竭患者心力衰竭分级与其可能的相关因素,运用套索回归从患者的“性别”“年龄”“体质量指数”“收缩压”“舒张压”“血清总胆固醇”“空腹血糖”“舌质颜色”“舌苔颜色”“中医体质”等自变量中筛选特征变量,构建回归模型以探讨其与心力衰竭严重程度之间的关系。结果：剔除高维数据中的混杂因素,筛选特征变量,模型中包含6个特征变量,体质量指数=0.006 357 091,收缩压=0.219 695 622,血清总胆固醇=0.229 324 833,舌色红=0.004 216 705,苔色薄白=-0.825 660 057,苔色黄厚=0.356 499 153。肺纤维化合并心力衰竭出现严重心力衰竭的概率为P=-33.632+0.006×BMI+0.220×SBP+0.229×TC+0.004×是否红舌-0.826×是否薄白苔+0.356×是否黄厚苔。结论：得到的模型可用以解释严重心力衰竭发病的相关因素并推广到总体中进行预测。套索回归模型适用于中医临...