血清RBP4、visfatin、RIPK1水平在冠心病伴颈动脉粥样硬化患者中的表达及临床意义

目的 探究血清视黄醇结合蛋白4(RBP4)、内脏脂肪素(visfatin)、受体相互作用蛋白激酶1(RIPK1)水平在冠心病伴颈动脉粥样硬化(CAS)患者中的表达及临床意义。方法 选取2020年2月至2021年2月于该院就诊的163例冠心病患者作为研究对象,按是否伴CAS分为冠心病组79例和冠心病伴CAS组84例。同期选取72例于该院进行体检的体检健康者作为健康组,检测上述研究对象血清RBP4、visfatin、RIPK1水平并分析其与冠心病伴CAS组的相关性。结果 与健康组、冠心病组相比,冠心病伴CAS组血清RBP4、visfatin、RIPK1水平较高,差异有统计学意义(P<0.05)。与中度、轻度冠心病伴CAS患者相比,重度冠心病伴CAS患者血清RBP4、visfatin、RIPK1水平较高,差异有统计学意义(P<0.05);Pearson相关性分析显示,RBP4、Gensini评分呈正相关(r=0.429,P=0.001);RBP4、Gensini评分呈正相关(r=0.486,P=0.001);visfatin、Gensini评分呈正相关(r=0.630,P=0.0...     

急性淋巴细胞白血病患者院内感染风险与营养指标的相关性分析

目的 分析急性淋巴细胞白血病患者(ALL)院内感染风险与营养指标的相关性。方法 选择2018年6月～2021年6月海南医学院第一附属医院住院治疗的124例ALL患者,根据患者是否发生院内感染分为感染组(42例)和未感染组(82例)。给予所有患者支持治疗,收集所有患者一般资料,包括年龄、性别、身体质量指数(BMI)、免疫分型、住院时间、是否使用糖皮质激素、融合基因、有无皮肤黏膜损害等;采用患者主观整体评估评分(PG-SGA评分)评估患者的营养状况;检测患者血清血红蛋白(Hb)、白蛋白(Alb)水平及外周血白细胞计数。以受试者工作特征曲线ROC分析Hb、Alb预测ALL患者发生院内感染的价值,以非条件logistic逐步回归分析ALL患者发生院内感染的危险因素。结果 与未感染组相比,感染组BMI <18.5 kg/m²、住院时间> 30 d、中度和重度营养不良、皮肤黏膜损害的患者比例较高,并且感染组Hb、Alb水平较低,差异有统计学意义(P <0.05);经ROC分析,Hb≤70.993 g/L、Alb≤37.295 g/L是ALL患者发生院内感染的...     

布鲁顿酪氨酸激酶对破骨细胞增殖及分化作用的实验研究

目的 观察布鲁顿酪氨酸激酶（BTK）对破骨细胞增殖及分化的影响,探讨BTK对根尖周炎骨破坏的作用。方法 破骨前体细胞RAW264.7经100 ng·L ^-1核因子κB受体活化因子配体（RANKL）诱导5 d后,通过观察细胞形态、抗酒石酸酸性磷酸酶（TRAP）染色及实时荧光定量PCR（RT-qPCR）的方法,验证破骨细胞是否诱导成功。破骨细胞诱导成功后,转染BTK-小干扰RNA（siRNA）24 h,利用RT-qPCR检测TRAP mRNA的表达,采用CCK-8和TRAP酶活性检测法检测破骨细胞的增殖及分化情况。结果 RAW264.7细胞经RANKL诱导5 d后,可见大量体积较大,外观呈圆形、椭圆形,周围有不规则突起及TRAP染色阳性的多核破骨细胞。经BTK-siRNA转染24 h后,破骨细胞TRAP mRNA的表达水平显著降低（P<0.05）,其增殖及分化能力也明显受到抑制（P<0.05）。结论 抑制BTK表达,可以抑制破骨细胞的增殖及分化;BTK可作为抑制破骨细胞的新靶点。     

尼莫地平对急性脑梗死患者认知功能的疗效分析

目的探讨急性脑梗死患者早期应用尼莫地平的疗效。方法选择2006年3月-2007年2月在本科住院急性脑梗死患者57例。随机分为2组,治疗组（n=31）和对照组（n=26）。2组患者均在入院后行脱水降颅内压及对症支持疗法,治疗组于发病72 h口服尼莫地平30 mg,3次/d,12周为一疗程。对照组不用任何与改变智能相关的药物。分别与发病72 h、治疗后4、8、12周应用SUMSE对认知功能进行评估,应用TCD测定脑血流量。结果与对照组比较,治疗组治疗后SUMSE评分显著提高（P〈0.05）;与治疗前比较,治疗组脑血流量有明显改善（P〈0.001）。结论早期应用尼莫地平可有效地改善脑血流量,促进脑卒中患者认知功能的恢复。     

Antimicrobial second skin using copper nanomesh

The functional support and advancement of our body while preserving inherent naturalness is one of the ultimate goals of bioengineering. Skin protection against infectious pathogens is an application that requires common and long-term wear without discomfort or distortion of the skin functions. However, no antimicrobial method has been introduced to prevent cross-infection while preserving intrinsic skin conditions. Here, we propose an antimicrobial skin protection platform copper nanomesh, which prevents cross-infectionmorphology, temperature change rate, and skin humidity. Copper nanomesh exhibited an inactivation rate of 99.99% for Escherichia coli bacteria and influenza virus A within 1 and 10 min, respectively. The thin and porous nanomesh allows for conformal coating on the fingertips, without significant interference with the rate of skin temperature change and humidity. Efficient cross-infection prevention and thermal transfer of copper nanomesh were demonstrated using direct on-hand experiments.

The functional support and advancement of our body while preserving the inherent naturalness is one of the ultimate goals of bioengineering (1–4). A functional layer is placed on the skin to complement the intrinsic biological and interactive functions (5, 6) and to add functions that do not yet exist (7–9). During use, the second skin layer should completely exploit its function and underlay skin functions without deforming the skin or interfering with the skin’s external interaction. Materials and structures need to be conformal and mechanically similar to the skin to minimize the distortion of natural sensations and movements. In addition, the air and heat transfer on the skin must be unimpeded to obtain a natural and comfortable wear fit (10).Body protection that requires common and long-term wear is an application in which both functionality and naturalness are important. As the outermost layer connecting our body to the environment, the skin is exposed to physical damage, hazardous chemicals, and infectious pathogens (11, 12). Therefore, we add a protective layer on the skin that blocks or filters out external contaminants. This entails the isolation and accumulation of biochemical compounds, which can lead to self-contamination and the subsequent cross-contamination/infection by interacting with other objects. In contrast to chemical contamination, which is not self-reproductive, the biological contamination of infectious microbes, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is a considerable issue to be addressed.By containing an antimicrobial material on the surface of the skin protective layer, cross-infection can be prevented in the long term. Unlike temporary rinsing or disinfection, the use of antibacterial or antiviral substances such as chemical or natural disinfectants and metal nanomaterials inhibits the growth of microorganisms on the surface (13–17). These materials are embedded in a complete covering polymer layer, such as gloves (18, 19), to isolate and protect both the inner and outer surfaces from the infection. To add breathability to the textile especially for the mask (13, 20, 21), many antibacterial fibers have been developed based on these materials. Moreover, various skin-attachable platforms with antimicrobial properties have been developed for convenient usage in daily lives. Antimicrobial nanofibers with conformal attachment to the skin have been developed for drug delivery, wound healing (22, 23), and electrophysiology (24, 25). In addition, stretchable and antibacterial hydrogels have been developed to allow more natural skin movement in wound-healing applications (26–28).However, there has been no practical skin protective solution to prevent cross-infection while preserving intrinsic skin conditions such as surface morphology, thermal transfer, and skin humidity. The thickening of the additional skin layer frequently results in a significant modification of the surface morphology, heat transfer, and the corresponding sensation. Thin layers have limited performance in terms of antimicrobial duration and speed. The skin coverage of polymer or hydrogel film blocks the transfer of air, moisture, and heat. In addition, the antimicrobial performance is focused on the skin side rather than the external side that affects cross-infection. Voids owing to the stiffness of the film or fiber and morphological differences compared to the skin further limit conformality, heat transfer, and water/air permeability (29).Here, we propose an antimicrobial skin protection platform copper nanomesh, which prevents cross-infection while minimizing modification of intrinsic skin properties such as interfacial morphology, temperature change rate, and skin humidity. The thin thickness and porous structure of the nanomesh allow conformal attachment to the fingertips, regardless of the mechanical and structural variations of the fingerprints, nails, and interfaces. To impart antimicrobial properties, copper, one of the most well-known antimicrobial (nano)materials (30–33), was coated with maintaining the nanomesh structure (copper nanomesh, from here onward). The measured inactivation rates of copper nanomesh against Escherichia coli bacteria and influenza virus A (H1N1) were 99.99% within 1 min and 10 min, respectively. It was found that the nanomesh structure contributed to the acceleration of bacterial inactivation compared to the copper film. Furthermore, it exhibited high biocompatibility with the skin cells and stable antibacterial performance even after long-term use (more than 6 h), including water immersion (more than 1 h).In addition, we investigated the naturalness of the copper nanomesh compared to that of the copper film and conventional gloves. As confirmed using the artificial skin and fingerprint recognition, the proposed copper nanomesh exhibited a higher conformability compared to that of the copper film. The copper nanomesh showed a high hydrophobicity to block external contaminants in solution while having high gas permeability and maintaining the skin humidity in a safe range. Additionally, the insertion of copper nanomesh did not affect the temperature change rate, which is important to maintain the sensation and comfort fit of the skin. Finally, the copper nanomesh was compared to the glove by wearing on our hands and interacting with various real-life objects. Using the proposed copper nanomesh, we successfully achieved an effective prevention of cross-infection and less-hindered thermal recognition of objects.     

根管超声冲洗的计算流体动力学分析

目的 应用计算机模型分析当超声工作尖位于根管内一定深度时冲洗液的计算流体动力学特点,以期为临床应用提供参考.方法 首先使用扫描激光振测系统扫描超声工作尖,分析其在一定功率下的振动特点.然后应用ICEM CFD 18.0软件建立根管超声冲洗模型,设置超声工作尖放置的位置为距根尖止点1 mm,通过FLUENT 18.0软件...     

鲑鱼降钙素对老年骨质疏松患者腰背疼痛及骨代谢的影响

目的 探讨鲑鱼降钙素注射液治疗老年骨质疏松的疗效,以及对患者腰背疼痛及骨代谢的影响.方法 选取湖北省枣阳市第一人民医院2018年6月至2019年6月收治的老年骨质疏松患者100例,按随机数字表法分为观察组和对照组,各50例.两组患者均采用常规口服药物治疗,观察组增加肌肉注射鲑鱼降钙素治疗,均治疗6周.结果 与治疗前比较...     

Propofol inhibits the malignant development of osteosarcoma U2OS cells via AMPK/FΟΧO1-mediated autophagy

It has previously been reported that propofol regulates the development of human osteosarcoma (OS). However, the specific molecular mechanisms underlying the effect of propofol on OS remain poorly understood. Therefore, the aim of the present study was to explore the effects of propofol on OS U2OS cells and the potential underlying mechanism. The Cell Counting Kit-8 and colony formation assays were performed to assess cell viability and proliferation. Furthermore, cell apoptosis was assessed using the TUNEL assay and western blotting. Wound healing and Transwell assays were performed to evaluate OS cell migration and invasion abilities, respectively. The protein expression levels of epithelial-mesenchymal transition (EMT)-, autophagy- and adenosine monophosphate-activated protein kinase (AMPK)/FOXO1 signaling pathway-related proteins were also determined using western blotting. The results demonstrated that propofol significantly reduced the viability of OS cells and promoted autophagy in a dose-dependent manner. Moreover, cell treatment with propofol significantly enhanced the protein expression levels of phosphorylated (p)-AMPK and FOXO1, while decreasing the protein levels of p-FOXO1. Furthermore, treatment with propofol significantly suppressed cell viability, migration and invasion abilities and the EMT of OS cells, and potentially promoted cell apoptosis via inducing autophagy via the AMPK/FOXO1 signaling pathway. In summary, the present study indicated that propofol potentially had an inhibitory effect on the development of OS cells via AMPK/FOXO1-mediated autophagy. These results have therefore provided an experimental basis for further studies into the therapeutic effect of propofol on OS.