Myeloid-Derived Suppressor Cells Protect Mouse Models from Autoimmune Arthritis via Controlling Inflammatory Response

Myeloid-derived suppressor cells (MDSCs) have been reported to participate in immune suppression and autoimmune disorders. However, its role in autoimmune arthritis remains to be determined. We explored whether adoptive transfer of MDSCs in vivo would block joint inflammation and histological damage using collagen-induced arthritis (CIA) and antigen-induced arthritis (AIA) models. CD11b⁺ Gr-1⁺ MDSCs were isolated from the single cells from the spleens of CIA mice on day 41 or AIA mice on day 35. MDSCs (2?×?10⁶) were then transferred to AIA and CIA mice via tail vein before arthritis establishment at indicated time points. Phosphate buffered saline (PBS) was injected as control. Arthritis was evaluated by severity score and histology. The levels of TNF-α, IL-6, IL-17 and IL-10 in the serum and joints were detected by enzyme-linked immunosorbent assay (ELISA). The number of Th17 cells and macrophages in draining lymph nodes and joint tissues was assessed by flow cytometric analysis. Adoptive transfer of MDSCs significantly reduced the clinical score of arthritis, alleviated joint inflammation and histological damage both in AIA and CIA models compared with PBS-treated control groups. The levels of TNF-α, IL-6, IL-17, and IL-10 in the serum and joints were down-regulated by transfer of MDSCs. In addition, adoptive transfer of MDSCs significantly reduced the number of Th17 cells and macrophages in draining lymph nodes and joint tissues. Altogether, we demonstrate that adoptive transfer of MDSCs prevented autoimmune arthritis in mouse models of RA through inhibiting Th17 cells and macrophages. These new findings provide insights into the inhibitory functions of MDSCs and MDSCs may be used as a cell-based biotherapy in RA.     

转录因子FOXQ1和增殖指数Ki67在进展期胃癌组织中相关性研究

目的：研究进展期胃癌组织中叉头框Q1（FOXQ1）与细胞增殖指数Ki67表达的相关性,分析两者表达水平对治疗预后的影响。方法：进展期胃癌167例,运用免疫组化法检测癌组织中FOXQ1和 Ki67蛋白的表达水平。采用Pearson法对FOXQ1与Ki67表达进行相关性分析,采用χ2检验分析FOXQ1和Ki67表达与临床参数的关系,Kaplan-Meier生存曲线和Log-rank检验分析患者无复发生存期（RFS）,采用Cox比例风险回归分析影响RFS的因素。结果：FOXQ1在胃癌组织中高表达,并与Ki6表达水平呈正相关性（r=0.77,P＜0.001）。患者RFS与FOXQ1高表达（HR=2.962,P<0.001）、Ki67高表达（HR=2.416,P<0.001）有关。FOXQ1和Ki67高表达患者术后RFS生存率低于FOXQ1和Ki67表达阴性者,差异具有统计学意义（P＜0.05）。结论：进展期胃癌组织中FOXQ1和Ki67高表达,两者表达水平呈正相关,FOXQ1及Ki67高表达影响SOX化疗方案的效果,与患者术后复发及RFS缩短相关。     

MR机房选址与环境安全问题的探讨

目的探讨在MR机房选址中容易忽视的一些环境安全问题。方法对近十几年来多家医院MR机房选址、设计进行分析。结果在MR机房布局及建筑设计上,均不同程度忽视了磁共振对环境和建筑结构的要求的特殊性,给磁共振的安装和安全使用上造成一定的困难。结论根据MR设备成像特点,MR机房在选址及设计时应重视对机房及周围环境的评价、建筑设计、布局方案施工要求、电力保障、通风、屏蔽室建立等环境安全问题。     

痤疮患者相关知识问卷的信效度研究

目的研究能够客观评价痤疮患者相关知识的问卷,并进行信效度检验。方法通过回顾相关文献回顾、半结构化访谈、专家访谈和专家评议法,形成初始问卷。选取403例痤疮患者进行调查。对问卷信效度进行评价,形成问卷终稿。结果最终形成的痤疮相关知识问卷包括5个维度、24个条目。通过探索性因子分析提取5个公因子。累计方差贡献率为53.907%,问卷内容效度为0.961,Cronbach’sα系数为0.829,重测信度0.897。结论该问卷具有良好的信效度,可作为评价痤疮患者痤疮相关知识了解程度的工具。     

益生菌在特应性皮炎中的应用进展

特应性皮炎是一种慢性复发性皮肤病,大部分发生在婴儿和童年期.流行病学研究发现,在过去的30年中,许多国家特应性皮炎的患病率大幅度增加,皮肤屏障破坏、免疫功能异常、菌群改变是其发病的主要原因.益生菌是活的微生物,补充适当的数量对宿主产生益处,作为一个免疫调节剂,已证明其安全性,临床上可以治疗炎症性皮肤病,如特应性皮炎.     

Alpha-Ketoglutarate: Physiological Functions and Applications

Alpha-ketoglutarate (AKG) is a key molecule in the Krebs cycle determining the overall rate of the citric acid cycle of the organism. It is a nitrogen scavenger and a source of glutamate and glutamine that stimulates protein synthesis and inhibits protein degradation in muscles. AKG as a precursor of glutamate and glutamine is a central metabolic fuel for cells of the gastrointestinal tract as well. AKG can decrease protein catabolism and increase protein synthesis to enhance bone tissue formation in the skeletal muscles and can be used in clinical applications. In addition to these health benefits, a recent study has shown that AKG can extend the lifespan of adult Caenorhabditis elegans by inhibiting ATP synthase and TOR. AKG not only extends lifespan, but also delays age-related disease. In this review, we will summarize the advances in AKG research field, in the content of its physiological functions and applications.     

针刺为主治疗急性缺血性中风的疗效观察

方法：将160例缺血性中风患者随机分为治疗组120例，对照组40例，经治疗60天后，分别对意识状态、运动缺损程度、评议进行观察对照。结果：治疗组有效率98.3%，对照组85.0%，二者差异有显著性意义（P＜0.05）；两组疗法对肢体肌力恢复有显著性意义（P＜0.01），治疗组疗效明显优于对照组（P＜0.01）。结论：该疗法是降低中风致残率，提高治愈率的有效方法。     

脑脊液CK、Aβ42、P-tau在阿尔茨海默病中的诊断价值

目的探究脑脊液CK、Aβ42、P-tau在阿尔茨海默病中的诊断价值。方法选取2018年5月至2020年5月本院收治的40例阿尔茨海默病患者(AD)为研究对象,另选取40例轻度认知障碍期患者(MCI),40例血管性痴呆患者(VD),40例健康体检人员为对照组。采用ELISA法测定四组脑脊液CK、Aβ42、P-tau水平;以受试者工作特征曲线(ROC曲线)评估三者诊断AD的价值。结果脑脊液CK、Aβ42、P-tau水平比较,AD组、VD组、MCI组CK及P-tau水平均显著高于健康对照组(P<0.05),AD组、VD组、MCI组Aβ42均显著低于健康对照组差异均有统计学意义(P<0.05)。AD组CK、P-tau水平显著高于VD组(P<0.05),Aβ42水平显著低于MCI组、VD组(P<0.05);VD组CK、P-tau水平显著高于MCI组(P<0.05)。ROC曲线分析结果显示,脑脊液CK、Aβ42、P-tau水平分别取3.045 U/L、155.63 ng/L、182.32 ng/mL时诊断效能最高,AUC分别为0.816、0.690、0.790(95%CI:0.709~0.923、0.572~0.808、0.678~0.902);三项联合诊断AD的AUC为0.887(95%CI:0.816~0.958),敏感度为0.950、特异度为0.725。结论脑脊液CK、Aβ42、P-tau对阿尔茨海默病有一定诊断价值,三项联合诊断价值更高。     

Development of Duramycin-Based Molecular Probes for Cell Death Imaging

Molecular Imaging and Biology - Cell death is involved in numerous pathological conditions such as cardiovascular disorders, ischemic stroke and organ transplant rejection, and plays a critical...