Clinical and immunological characteristics in COVID-19 convalescent patients

European Journal of Clinical Microbiology & Infectious Diseases - The humoral and cellular immunity of convalescent COVID-19 patients is involved in pathogenesis and vaccine immunity. In this...     

胸椎旁神经阻滞术穿刺深度的解剖学研究

目的　观察横突、肋横突外侧韧带与脊神经之间的毗邻关系,为提高超声引导下胸椎旁神经阻滞术的安全性及阻滞效能提供解剖学依据。 方法　选用18具标本胸椎节段,取椎板外侧缘和同名脊神经根的十字交点作为测量的起点,分别测量T1~12共12个节段脊神经与横突下后缘中点、肋横突外侧韧带下缘中点之间的距离。根据“3个一组”原则,12个节段共分为4组,记为T1~3组、T4~6组、T7~9组及T10~12组,对不同组别的脊神经-横突间距、脊神经-肋横突外侧韧带间距分别进行单因素方差分析。 结果　（1）脊神经-横突间距：平均为（16.13±5.59）mm,T1~12总体呈先递增后递减的趋势,T5节段最大,为（18.88±5.78）mm,T5向上或向下节段逐渐减小,T1节段为（16.62±3.67）mm,T12节段为（9.76±3.75）mm。自上而下4组的脊神经-横突间距分别为（17.50±4.67）、（18.19±5.62）、（16.92±5.28）及（12.00±4.42）mm,T10~12组相比T1~3组（P<0.01）、T4~6组（P<0.01）、T7~9组（P<0.01）有统计学差异。（2）脊神经-肋横突外侧韧带间距：平均为（17.67±3.76）mm,自上而下4组的间距分别为（16.95±3.82）、（17.55±3.89）、（17.81±3.83）及（18.30±3.43）mm,两两比较均无统计学差异（P>0.05）。 结论　了解脊神经-横突间距、脊神经-肋横突外侧韧带间距利于估算椎旁神经阻滞的安全穿刺深度,以提高阻滞效能,避免脊神经损伤及全脊髓麻醉的风险。     

股深动脉第1穿动脉穿支皮瓣修复臀股部IV期压疮疗效

目的　探讨应用股深动脉第1穿动脉穿支皮瓣修复臀股部IV期压疮的可行性。 方法　2016年1月至2019年2月,本院手足创伤骨科收治9例臀股部IV期压疮患者,男3例,女6例,年龄26~68岁,平均46岁。截瘫原因：高处坠落伤4例,车祸伤3例,脑梗塞2例。清创后创面面积8 cm×5 cm~18 cm×9 cm。根据创面形状、大小及位置设计股深动脉第1穿动脉穿支皮瓣修复压疮创面,皮瓣面积为10 cm×7 cm~20 cm×10 cm。 结果　所有皮瓣成活,其中2例术后局部渗液较多,经积极保守换药治疗后,皮瓣恢复良好。9例获得6~24月随访,平均13月,皮瓣色泽良好,质地柔软,不影响日常生活,压疮未见复发。 结论　股深动脉第1穿动脉穿支皮瓣操作简便,血供可靠,可供组织量较多,是修复臀股部IV期压疮的较好选择。     

雅培ARCHITECT i2000全自动免疫分析系统检测维生素B12、叶酸及铁蛋白的性能验证

目的 验证应用雅培ARCHITECT i2000SR全自动免疫分析系统对维生素B12、叶酸及铁蛋白的检测性能.方法 依据CNAS GL037《临床化学定量检验程序性能验证指南》、美国临床实验室标准化协会(CLSI)系列指南文件及卫生行业标准进行正确度、精密度、线性范围及参考区间进行验证.结果 维生素B12、叶酸及铁蛋白室间质评5个浓度样本检测结果均值与靶值之间的偏倚均＜1/2 TEa,正确度符合要求;批内不精密度和总精密度均符合厂家说明书要求,重复性良好;维生素B12、叶酸及铁蛋白的最优拟合曲线为一阶方程,线性回归方程的斜率均在1.00±0.05范围内且满足R2≥0.95的要求;维生素B12、叶酸及铁蛋白的测量值与厂家提供的参考区间符合率均≥95％.结论 应用ARCHITECT i2000SR全自动免疫分析系统检测维生素B12、叶酸及铁蛋白的正确度、精密度、线性范围及参考区间均符合厂家和卫生行业标准的要求,可为临床提供可靠依据.     

血浆NETs表达与稳定期慢性阻塞性肺疾病严重程度的相关性研究

目的 检测中性粒细胞胞外诱捕网(NETs)在稳定期慢性阻塞性肺疾病(COPD)患者血浆中表达情况,探讨其与COPD患者疾病严重程度的相关性.方法 选择2018年1月至2020年6月在本院呼吸科治疗的稳定期COPD患者107例,根据肺功能将COPD患者分为轻度组41例、中度组27例、重度组22例和极重度组17例,另选取同期在本院体检的108例健康体检人员作为对照组.检测各研究对象血浆NETs水平,采用Pearson分析COPD患者血浆NETs与第1秒用力呼气容积(FEV1)、第1秒用力呼气容积占用力肺活量百分比(FEV1/FVC)、BODE指数、C反应蛋白(CRP)相关性,ROC曲线分析血浆NETs对COPD诊断及病情严重程度的预测价值.结果 与对照组比较,COPD患者血浆NETs、CRP水平、BODE指数显著升高,FEV1％、FEV1/FVC显著降低,差异有统计学意义(P均<0.05);轻度、中度患者血浆NETs水平低于重度、极重组患者,差异有统计学意义(P均<0.05),轻度、中度之间患者血浆NETs水平差异无统计学意义(P均>0.05),重度、极重组之间患者血浆NETs水平差异无统计学意义(P均>0.05);相关性分析显示,COPD患者血浆NETs水平与BODE指数、CRP水平呈正相关(P均<0.05),与FEV1％、FEV1/FVC呈负相关(P均<0.05).结论 NETs在COPD患者血浆中水平增高,与患者疾病严重程度有关,具有一定临床意义.     

Duration of SARS‐CoV‐2 RNA shedding and factors associated with prolonged viral shedding in patients with COVID‐19

To investigate the factors associated with the duration of severe acute respiratory syndrome coronavirus 2 RNA shedding in patients with coronavirus disease 2019 (COVID‐19). A retrospective cohort of COVID‐19 patients admitted to a designated hospital in Beijing was analyzed to study the factors affecting the duration of viral shedding. The median duration of viral shedding was 11 days (IQR, 8‐14.3 days) as measured from illness onset. Univariate regression analysis showed that disease severity, corticosteroid therapy, fever (temperature>38.5°C), and time from onset to hospitalization were associated with prolonged duration of viral shedding (P < .05). Multivariate regression analysis showed that fever (temperature>38.5°C) (OR, 5.1, 95%CI: 1.5‐18.1), corticosteroid therapy (OR, 6.3, 95%CI: 1.5‐27.8), and time from onset to hospitalization (OR, 1.8, 95%CI: 1.19‐2.7) were associated with increased odds of prolonged duration of viral shedding. Corticosteroid treatment, fever (temperature>38.5°C), and longer time from onset to hospitalization were associated with prolonged viral shedding in COVID‐19 patients.     

MIR210HG Aggravates Sepsis-Induced Inflammatory Response of Proximal Tubular Epithelial Cell via the NF-κB Signaling Pathway

PurposeAcute kidney injury (AKI) is a serious complication of sepsis and is characterized by inflammatory response. MicroRNA-210 host gene (MIR210HG) is upregulated in human proximal tubular epithelial cells under treatment of inflammatory cytokines. This study aimed to explore the role of MIR210HG in sepsis-induced AKI.Materials and MethodsCell viability was detected by a cell counting kit 8 assay. The levels of proinflammatory cytokines were detected by enzyme-linked immunosorbent assay kits. The protein levels of p65, IκBα, and p-IκBα were examined by western blot analysis. The nuclear translocation of nuclear factor kappa B (NF-κB) was detected by immunofluorescence assay. The histological changes of kidneys were analyzed by hematoxylin and eosin staining assay.ResultsLipopolysaccharide (LPS) treatment significantly inhibited cell viability and increased productions of proinflammatory cytokines in proximal tubular epithelial cells (HKC-8). Additionally, MIR210HG levels in HKC-8 cells were increased by LPS treatment. MIR210HG silencing inhibited the LPS-induced cell inflammatory response. MIR210HG activated the NF-κB signaling pathway by promoting the phosphorylation of IκBα and nuclear translocation of p65. Rescue assays revealed that the MIR210HG-induced increase of cytokines levels and decline of cell viability were rescued by QNZ treatment. Knockdown of MIR210HG decreased blood urea nitrogen, serum creatinine, and proinflammatory cytokine levels in AKI rats. Moreover, the knockdown of MIR210HG protected against AKI-induced histological changes of kidneys in rats.ConclusionMIR210HG promotes sepsis-induced inflammatory response of HKC-8 cells by activating the NF-κB signaling pathway. This novel discovery may be helpful for the improvement of sepsis-induced AKI.     

Clinical implications of procalcitonin in Kawasaki disease: a useful candidate for differentiating from sepsis and evaluating IVIG responsiveness

Clinical and Experimental Medicine - Kawasaki disease (KD) is an acute systemic vasculitis and suspected to be triggered by several potential infections in which procalcitonin (PCT) experiences an...     

Associations of BNIP3 and DAPK1 gene polymorphisms with disease susceptibility,clinicopathologic features,anxiety, and depression in gastric cancer patients

The purpose of this study is to explore the associations of BNIP3 and DAPK1 polymorphisms with disease susceptibility, clinicopathologic characteristics, depression, and anxiety in gastric cancer (GC) patients. In this study, 150 GC patients and 100 healthy controls were recruited. 1000 Genomes database and Haploview 4.0 software were used to select tag SNPs. Improved multiplex ligase detection reaction was used for genotyping. Data were analyzed using Chi-square test (χ² test) and univariate and multivariate logistic regression. The results demonstrated that the rs10781582 of BNIP3 in the dominant model was associated with a reduced risk of GC in the younger group (P _BH = 0.015), and the minor allele G of rs1329600 at DAPK1 was associated with reduced risk of GC (P _BH = 0.018). In the stratified analysis, the rs3793742 and rs10781582 of BNIP3 in the dominant model were associated with gender and age of GC patients, respectively (rs3793742: P _BH = 0.033; rs10781582: P _BH = 0.030). The rs10781582 of BNIP3 in the dominant model was correlated with depression in GC patients (P _BH = 0.003). However, no association was found between BNIP3 and DAPK1 polymorphisms and differentiation degree, TNM stage, lymph node metastases, visceral metastasis, and anxiety. In summary, polymorphisms of BNIP3 and DAPK1 were associated with a protective effect against GC. So far, this is the first study to explore the association between BNIP3 and DAPK1 gene polymorphism and GC risk, which may provide new insight about biologic mechanisms of GC pathogenesis.     

Morphological analysis of three-dimensionally reconstructed frontal sinuses from Chinese Han population using computed tomography

International Journal of Legal Medicine - The uniqueness and reliability of frontal sinuses for personal identification have gained wide recognition in forensics. However, few studies have assessed...