生地当归方对骨折早期治疗中抗自由基损害的影响

目的:探讨生地当归方在骨折早期治疗中抗自由基损害的临床效果。方法:随机抽取86例闭合性骨折患者作为生地当归方治疗组,86例采用常规西药治疗的闭合性骨折患者,50例健康体检者作为对照组,比较3组入选者治疗前及治疗后第4天脂质过氧化物(LPO)和超氧化物歧化酶(SOD)水平变化情况。结果:生地当归方治疗组、西药治疗组两组患者治疗前脂质过氧化物水平均显著高于对照组,超氧化物歧化酶水平均显著低于对照组(P0.05);生地当归方治疗组患者治疗后脂质过氧化物和超氧化物歧化酶水平接近对照组(P0.05);西药治疗组患者治疗后脂质过氧化物和超氧化物歧化酶水平未发生明显变化,与对照组比较,差异具有统计学意义(P0.05)。结论:骨折早期治疗中生地当归方具有明显抗自由基损害和增强机体自由基的清除功能的效果。     

Comparison of genotypes of Streptococcus pneumoniae serotypes 6A and 6B before and after the introduction of PCV7 vaccination in Korea

We investigated changes of serotypes in Streptococcus pneumoniae and the characteristics of serotypes 6A and 6B in Korean hospitals after the introduction of the 7-valent pneumococcal conjugate vaccine (PCV7). PCV7 serotypes decreased significantly from 66.8% in 1996-2001 to 41.3% in 2008-2009 (P<0.001). However, serotype 6B did not decrease during these 2 periods (5.7% to 6.4%). Non-PCV7 serotypes that increased significantly were 3 (3.6% to 9.1%), 6A (3.1% to 8.5%), 13/28 (0 to 3.7%), 15 (2.2% to 6.7%), 16.36.37 (0 to 1.2%), 19A (1.2% to 9.7%), and 23A (0 to 1.5%). Multilocus sequence typing indicated that 9 STs were identified among 36 isolates of serotype 6A and 19 among 35 isolates of serotype 6B. No STs were found both in the 2 serotypes. The increase in serotype 6A was associated mainly with ST81, a Spain-23F clone genotype. The association of serotype 6A and ST81 is unique to Korea. Clones of serotype 6B isolates changed between the 2 periods. ST282, the main clone of serotype 6B in the PCV7 period, was found only in Korea. Our study demonstrates changing characteristics of pneumococcal serotypes 6A and 6B isolates in Korea and suggests selective evolution of certain clones in the era of PCV7 vaccination.     

M2型巨噬细胞促分泌的IL-6因子对成纤维细胞活化的作用机制研究

特发性肺纤维化(idiopathic pulmonary fibrosis, IPF)通常伴有炎症反应,其中巨噬细胞与其密切相关,通过巨噬细胞与肺成纤维细胞共培养模型和博来霉素诱导的IPF小鼠模型,本文探究了巨噬细胞和白细胞介素-6(interleukin 6, IL-6)与IPF的联系。动物福利和实验过程均遵循天津中医药大学动物伦理委员会的规定。结果表明,博来霉素(bleomycin, BLM)诱导的IPF小鼠体内IL-6含量明显升高,且肺部有大量的炎性细胞浸润。划痕及免疫荧光实验结果表明,共培养36 h替代活化型(alternatively activated, M2)巨噬细胞可诱导成纤维细胞迁移及活化,且在共培养体系中IL-6的表达随之增多。划痕及天狼星红实验结果证明IL-6可促进成纤维细胞迁移和活化。研究结果证明, M2型巨噬细胞通过促进成纤维细胞分泌IL-6,从而诱导成纤维细胞活化及迁移,影响IPF发展。     

Annual Case Volume and One-Year Mortality for Endovascular Treatment in Acute Ischemic Stroke

BackgroundThe association between endovascular treatment (EVT) case volume per hospital and clinical outcomes has been reported, but the exact volume threshold has not been determined. This study aimed to examine the case volume threshold in this context.MethodsNational audit data on the quality of acute stroke care in patients admitted via emergency department, within 7 days of onset, in hospitals that treated ≥ 10 stroke cases during the audit period were analyzed. Ischemic stroke cases treated with EVT during the last three audits (2013, 2014, and 2016) were selected for the analysis. Annual EVT case volume per hospital was estimated and analyzed as a continuous and a categorical variable (in quartiles). The primary outcome measure was 1-year mortality as a surrogate of 3-month functional outcome. As post-hoc sensitivity analysis, replication of the study results was examined using the 2018 audit data.ResultsWe analyzed 1,746 ischemic stroke cases treated with EVT in 120 acute care hospitals. The median annual EVT case volume was 12.0 cases per hospital, and mortality rates at 1 month, 3 months, and 1 year were 12.7%, 16.6%, and 23.3%, respectively. Q3 and Q4 had 33% lower odds of 1-year mortality than Q1. Adjustments were made for predetermined confounders. Annual EVT case volume cut-off value for 1-year mortality was 15 cases per year (P < 0.02). The same cut-off value was replicated in the sensitivity analysis.ConclusionAnnual EVT case volume was associated with 1-year mortality. The volume threshold per hospital was 15 cases per year.     

Relative Effectiveness of COVID-19 Vaccination in Healthcare Workers: 3-Dose Versus 2-Dose Vaccination

The omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is known to have high infectivity and is more likely to evade vaccine immunity. However, booster vaccination is expected to strengthen cross-reactive immunity, thereby increasing the vaccine effectiveness (VE). This study aimed to evaluate the relative VE of the 3-dose (booster) vaccination compared with the 2-dose primary series vaccination in healthcare workers during omicron variant-dominant periods. During the omicron-dominant period from February 1, 2022 to February 28, 2022, a 1:1 matched case-control study was conducted. Healthcare workers with positive SARS-CoV-2 test results were classified as positive cases, whereas those with negative results served as controls. Compared with the 2-dose primary series vaccination, booster vaccination with mRNA vaccine showed moderate VE (53.1%). However, in multivariate analysis including the time elapsed after vaccination, the significant VE disappeared, reflecting the impact of recent vaccination rather than the third dose itself.     

大鼠减体积肝移植术后移植肝脏应激蛋白的差异表达研究

目的  探讨大鼠减体积肝移植术后肝脏应激蛋白的差异表达情况。 方法  分别将改良大鼠减体积肝移植模型术后1、3、7 d的肝脏组织标本的双向电泳图谱与供体和受体原肝脏组织的双向电泳图谱进行比较, 以变化倍数大于10倍或小于1/10为标准选择差异蛋白点, 再利用质谱技术及数据库对差异表达的蛋白质点进行分析和鉴定。 结果  共发现了72个差异表达的蛋白质点, 通过质谱分析和一系列的鉴定, 最终发现有32种功能明确的蛋白, 其中热休克蛋白-8与肥厚激动剂反应蛋白在减体积移植术后肝脏表达差异较大, 占所有差异蛋白质点的7%(5/72)。 结论  在大鼠减体积肝移植术后移植肝脏中发现参与肝脏应激反应的蛋白质, 为下一步研究这些蛋白与肝移植术后肝脏缺血-再灌注损伤的关系提供了前期研究数据。