Study of the mechanism of essential garlic oil inhibiting lnterleukin-1 α-induced monocyte adhesion to endothelial cells

Objective  

To observe the effects of essential garlic oil (EGO) on vascular cell adhesive molecule-1 (VCAM-1) expression of endothelial cells and monocyte-endothelial cell adhesion rate induced by interleukin-l_α(IL-l_α).     

Comparative study of different transplantation methods of adipose tissue-derived stem cells in the treatment of erectile dysfunction caused by cavernous nerve injury

We aimed to compare intracavernosal injection (ICI), tail vein injection (IV), and periprostatic injection (PPI) of adipose-derived stem cells (ADSCs) for their ability to improve erectile function in cavernous nerve injury-induced erectile dysfunction (CNIED) rats and to explore the possible mechanism. Eighty-four male SD rats were divided into the sham group (n = 6), BCNI group (bilateral CN crush injury, n = 6), PBS-ICI group (n = 6), PBS-IV group (n = 6), PBS-PPI group (n = 6), ADSC-ICI group (n = 18), ADSC-IV group (n = 18) and ADSC-PPI group (n = 18). ADSCs were labelled with 5-ethynyl-2′-deoxyuridine (EdU), and six rats each in the ADSC-ICI group, ADSC-IV group, and ADSC-PPI group were sacrificed 2, 7, and 28 days after injection. EdU-labelled ADSCs were tracked by immunofluorescence staining. The intracavernosal pressure (ICP)/mean arterial pressure (MAP) ratio, neuronal nitric oxide synthase (nNOS)-positive nerve fibres in the dorsal penile nerve and the smooth muscle/collagen ratio in the cavernosum between groups were also evaluated. ADSCs can significantly improve erectile function through ICI or IV. The two are similar in efficacy and superior to PPI. The mechanism may be that after CN injury, ADSCs are recruited to around the MPG and secrete a variety of neurotrophic factors that promote the repair of the CN, thereby improving erectile function.     

In vivo imaging of neuroblastomas using GD2-targeting graphene quantum dots

BackgroundPatients with neuroblastoma, a common childhood malignancy, often have poor prognosis. It is mandatory to develop an accurate and efficient diagnostic tool for neuroblastomas, so that the treatment can be started early. Graphene quantum dot (GQD), a nanomaterial, can be used to carry proteins, genetic materials, or drugs. GD2, a disialoganglioside, is a surface antigen expressed on neuroblastoma. This study investigated the in vivo targeting and imaging of neuroblastomas using GD2-targeting GQDs.MethodsGQDs were synthesized and conjugated with anti-GD2 antibody (anti-GD2/GQDs). In vitro cytotoxicity of GQDs and anti-GD2/GQDs was studied in human neuroblastoma cells by 3-[4,5-dimethylthiazole-2-yl]-2,5-diphenyltetrazolium bromide)-based colorimetric assay. The tumor tracking and imaging of anti-GD2/GQDs in mice were investigated by in vivo imaging system (IVIS).ResultsTreatment with GQDs or anti-GD2/GQDs induced no or mild cytotoxicity in fibroblasts and neuroblastoma cells. After co-incubation, GQDs and anti-GD2/GQDs were located in the cytoplasm and nucleus of neuroblastoma cells, with GQDs showing a blue fluorescence and anti-GD2/GQDs an orange/red emission. The IVIS images demonstrated accumulation of the fluorescence of anti-GD2/GQDs in the subcutaneous tumors in mice 24 h after intravenous injection of anti-GD2/GQDs.ConclusionsAnti-GD2/GQDs may potentially be used for the targeting and imaging of neuroblastomas in vivo.     

基于肠道菌群和代谢组学研究化滞柔肝颗粒治疗非酒精性脂肪肝的作用机制

目的 探讨化滞柔肝颗粒治疗非酒精性脂肪肝（nonalcoholic fatty liver disease,NAFLD）的作用机制。方法 高脂饮食饲养8周构建大鼠NAFLD模型,化滞柔肝颗粒ig给药4周。半自动生化分析仪测定大鼠血脂相关指标;油红O染色观察肝脏组织病理变化;Illumina Miseq测序平台对V3～V4可变区进行扩增和测序,超高效液相色谱串联质谱（UPLCMS/MS）开展血浆代谢组学研究,并结合Spearman进行肠道菌群与代谢组学之间的关联分析。结果 与模型组相比,化滞柔肝颗粒中、高剂量组可显著降低大鼠体质量（P<0.05、0.01）和血清总胆固醇（totalcholesterol,TC）、三酰甘油（triacylglycerol,TG）水平（P<0.01）,升高高密度脂蛋白（high-density lipoprotein cholesterol,HDL-C）水平（P<0.05、0.01）。此外,化滞柔肝颗粒高剂量组还可显著降低大鼠低密度脂蛋白（low-density lipoprotein cholesterol,LDL-C）水平（P<0...     

损伤血管内膜增生的研究

血管损伤后内膜增生（IH）是血管外科重建、血管腔内治疗术后发生狭窄或闭塞的主要原因，也是血管外科长期以来拯待解决的难题。有关的研究一直是血管外科临床和基础研究的重点。     

二氧化硅法纯化琼脂糖凝胶中的DNA

利用二氧化硅特异地吸附核素的特性，建立了从琼脂糖凝胶中回收ＤＮＡ的方法。结果表明本方法对１３００￣３５００ｂｐ的ＤＮＡ回收效果较好，回收效率达６０％￣７０％，１００￣１５００ｂｐ，３５００￣５０００ｂｐ的ＤＮＡ亦能被有效地回收。通过对回收ＤＮＡ的酶切，连接等实验，证实了所回收的ＤＮＡ片段能够满足进一步的实验要求。该方法简单，快捷，经济，适用，值得推广。     

基于互严格凹函数测度的医学图像配准新方法

为了提高医学图像配准的运算速度和增大配准的稳定区域，提出用严格凹函数取代互信息中的香农熵函数的方法，形成了互严格凹函数测度（NMi，i=1，2，…，6）。互信息只是互严格凹函数测度的一个特例。并提出一种新的判断配准好坏的标准——稳定区域和稳定区域宽度。通过试验比较得NM2、NM4、NM5互严格凹函数测度比互信息好，比Ⅰ0.2和R0.2测度更好，即这三个测度的配准时间比互信息少，比Ⅰ0.2和R0.2测度更少；三个测度配准的平均稳定区域宽度比互信息宽，比Ⅰ0.2和R0.2测度更宽。最后用NM2测度进行多模态医学图像的非刚体配准试验，结果表明效果良好。     

微量补体反应性溶血测定法

本文报道从酵母多糖活化的急性期患者血浆中分离Ｃ＾－５６复合物，并经ＤＥＡＥ－纤维素ＤＥ－３２阴离子交换层析纯化。利用微孔板和自动微孔板测定仪建立了一种简单，灵敏，准确的微量反应性溶血测定法。     

试论图书馆核心竞争力的提升

随着现代信息社会的发展,图书馆的核心竞争力已关系到图书馆未来的生存和发展.文章分析了图书馆核心竞争力的构成及影响因素.提出了提升图书馆核心竞争力的策略.