A mononuclear nine-coordinated Dy(iii) complex exhibiting field-induced single-ion magnetism behaviour

A new mononuclear Dy(iii) complex, with the formula [Dy(Hcpt)₃]·2H₂O (1), has been successfully prepared via self-assembly between Dy(iii) ions and 2-cyano-N′-(1-(pyridin-2-yl)amido)acetyl (Hcpt) ligand. X-ray diffraction study shows that the Dy(iii) ion is nine-coordinated by three Hcpt ligands with a tridentate chelating mode, leading to an approximately monocapped square-antiprismatic (C_4v) geometry. Magnetic data analysis demonstrates that 1 performs field-induced slow magnetic relaxation with a relaxation barrier of 97.90 K, due to the quantum tunneling effect suppressed upon a static dc field of 2000 Oe. To deeply understand the magnetic behaviors, the relaxation mechanisms and magneto-structure relationship are rationally discussed using ab initio calculations as well.

Reaction of Dy(iii) ion with tridentate acylhydrazone ligand leads to a field-induced Dy(iii) SIM, of which the magneto-structural correlation is elucidated by the magnetic and theoretical studies.     

早产临产产妇单剂量应用糖皮质激素的疗效研究

目的 探讨单剂量应用糖皮质激素在早产临产产妇中的作用.方法 选取2019年该院孕28～34+6周451例早产产妇为研究对象,按地塞米松给药方式不同,分为单剂量用药、单疗程用药和未用药3组;另选35～36+6周525例早产产妇为研究对象,分单剂量用药和未用药2组.比较并分析不同孕周不同用药方式产妇的母儿结局.结果 与单剂量用药产妇比较,孕28～34+6周单疗程用药产妇的羊水粪染(31.16％vs.17.19％)及新生儿心肌损害(25.36％vs.16.29％)发生率更低,未用药产妇的新生儿1 min Apgar评分[(8.75±0.16)分vs.(7.83±0.31)分]、5 min Apgar评分[(9.25±0.16)分vs.(8.67±0.21)分]更差,而新生儿呼吸系统疾病(32.61％vs.54.35％)及颅内出血(2.17％vs.9.78％)发生率升高,差异有统计学意义(P<0.05).与单剂量用药产妇比较,孕35～36+6周未用药产妇的新生儿5 min Apgar评分[(9.65±0.12)分vs.(9.24±0.11)分]更差,新生儿转科率(25.97％vs.35.21％)更高,差异有统计学意义(P<0.05).结论 早产产妇单剂量应用糖皮质激素能适度改善预后,可作为单疗程用药的有效补充方式.     

免疫抑制剂对大鼠坐骨神经损伤修复后细胞因子表达的影响

目的初步探讨3种免疫抑制剂对大鼠坐骨神经损伤修复后细胞因子表达的影响。方法42只W istar大鼠制作动物模型,切断双侧坐骨神经,并予以端端吻合,分别联合给予不同组合的甲基强的松龙、环孢素A(C sA)和FK 506,A组(对照组,n=9)不给药,B组(n=9)术后使用2 d甲基强的松龙20 m g/(kg.d);C组(n=9)在B组的基础上,术后使用2周FK 506,剂量为1 m g/(kg.d);D组(n=3)在B组的基础上,术后使用4周FK 506,剂量同C组;E组(n=9)在B组的基础上,于术后使用2周C sA,剂量为2 m g/(kg.d);F组(n=3)在B组的基础上,于术后使用4周C sA,剂量同E组。于术后1、2和4周各组分别取双侧坐骨神经,进行白细胞介素1β(in terleuk in 1,βIL-1β)、肿瘤坏死因子α(tum or necros is factor,αTNF-α)、干扰素γ(in terferon,γIFN-γ)和巨噬细胞游走因子(m acrophage m igration inh ib itoryfactor,M IF)的免疫组织化学染色,并对染色结果进行分析、比较。结果A组修复后的坐骨神经IL-1β和IFN-γ的表达高峰出现于术后第1周,术后第2周表达量明显减少,至第4周就难以发现阳性染色;TNF-α和M IF的表达则只出现在第1周,且表达水平较低。各实验组IL-1β、TNF-α和IFN-γ的表达高峰均出现于术后第2周,且持续至第4周仍有表达,M IF的表达高峰出现在第1周,其表达也可持续至第4周。各实验组组间比较发现C~F组间细胞因子的表达无明显差异,B组的表达介于A组和其它实验组之间。结论免疫抑制剂的使用可以延缓周围神经损伤后IL-1β、TNFα-、IFN-γ和M IF表达的峰值,而且可以明显延长其表达时间。     

Integrated gene expression profiling analysis reveals SERPINA3, FCN3, FREM1, MNS1 as candidate biomarkers in heart failure and their correlation with immune infiltration

BackgroundThe purpose of this study was to identify possible diagnostic indicators for heart failure (HF) and to investigate the function of immune cell infiltration in this pathophysiology.MethodsHF datasets from the Gene Expression Metascape database were utilized. R software was used to the identify differentially-expressed genes (DEGs) and perform functional correlation analysis. Least absolute shrinkage and selection operator (LASSO) and Boruta algorithms elimination algorithms were then employed to screen and validate the HF diagnostic variables. Finally, Single-sample Gene Set Enrichment Analysis (ssGSEA) was utilized to assess immune cell infiltration in HF tissues, and the Spearman association between gene expression and immune cell concentration was investigated.ResultsA total of 239 DEGs were screened in this study. SERPINA3 (area under the curve, AUC =0.958), FCN3 (AUC =0.972), FREM1 (AUC =0.954), and MNS1 (AUC =0.948) were identified as diagnostic factors of HF. The gene set differentiation analysis (GSVA) (R package “GSVA”) results showed that the high expression of FREM1 and MNS1 genes was involved in bile acid, fatty acid, and heme metabolism, suggesting that the core gene affects the progression of HF by regulating metabolism. Meanwhile, the high expression of FCN3 and SERPINA3 was related to xenobiotic metabolism, inflammatory response, and adipogenesis.ConclusionsGiven the importance of immune cell infiltration in the genesis and progression of HF, SERPINA3, FCN3, FREM1, and MNS1 may be used as diagnostic variables for HF.     

民国时期公医制的形成过程及其对医学教育的影响

由于民国时期医疗卫生资源的缺乏,一些有识之士提出了实施公医制度来解决?为此当时的学者们分别从公医制的实施意义及实施公医制的具体方法提出了较为详细的指导意见,很大一部分与医学教育的制度相配套?经过个别医学校的试验成功后,公医制得以初步成型,并对当时的医学教育产生了一定的影响?     

脑卒中女性患者的盆底结构及盆底肌电特征

目的 探讨脑卒中对女性患者盆底结构和功能的影响。方法 2020年6月至12月,东南大学附属中大医院住院的脑卒中女性患者21例(卒中组)分为尿失禁组(n=6)和非尿失禁组(n=15),另选取同龄健康女性志愿者20例作为对照组。所有受试者行经会阴盆底超声和盆底表面肌电检查。结果 尿失禁组和非尿失禁组平均肌电值、积分肌电值、均方根值、平均功率频率和中位频率均低于对照组(P <0.05),尿失禁组与非尿失禁组间无显著性差异(P> 0.05)。三组间膀胱颈位置,膀胱尿道后角,膀胱颈移动度,尿道旋转角,以及Valsalva动作后肛提肌裂孔前后径、左右径和面积均无显著性差异(F <2.484, P> 0.05)。结论 无论是否存在尿失禁,脑卒中女性患者盆底肌活动均有不同程度下降,盆底支持组织的结构尚未发生明显改变。     

氨甲环酸在开胸手术中的应用

目的评价氨甲环酸在开胸手术中的止血作用和对开胸手术围术期凝血纤溶功能的影响。方法选择因罹患肺或食管肿瘤的开胸手术患者40例,随机分为两组:氨甲环酸组(A组,n=20)在麻醉诱导后切皮前静脉滴注10mg/kg氨甲环酸,术中持续泵注1mg.kg-1.h-1至术毕;对照组(B组,n=20)持续泵注生理盐水。分别于术前,术中3h,术后第1天和第3天抽取中心静脉血检测血栓弹力图(TEG),凝血常规,包括凝血酶原时间(PT),部分活化凝血酶时间(APTT)和纤维蛋白原(Fib)含量,及血浆D-二聚体含量,并记录术中出血量和术后24h胸腔引流量。结果T组术中、术后CI均明显高于对照组,术后LY30显著低于对照组(P<0.05);T组术中和术后D-二聚体含量均明显低于C组(P<0.01);T组术中出血量和术后24h胸腔引流量明显少于C组(P<0.01)。结论氨甲环酸抑制了纤溶活性的增强,改善了开胸手术后早期的低凝状态,显著减少了开胸手术围术期的血液丢失。     

Using Interrupted Time Series Design to Analyze Changes in Hand, Foot, and Mouth Disease Incidence during the Declining Incidence Periods of 2008-2010 in China

ObjectiveTo identify patterns of hand, foot and mouth disease (HFMD) incidence in China during declining incidence periods of 2008, 2009, and 2010.MethodsReported HFMD cases over a period of 25 months were extracted from the National Disease Reporting System (NDRS) and analyzed. An interrupted time series (ITS) technique was used to detect changes in HFMD incidence rates in terms of level and slope between declining incidence periods of the three years.ResultsOver 3.58 million HFMD cases younger than 5 years were reported to the NDRS between May 1, 2008, and May 31, 2011. Males comprised 63.4% of the cases. ITS analyses demonstrated a significant increase in incidence rate level (P<0.0001) when comparing the current period with the previous period. There were significant changes in declining slopes when comparing 2010 to 2009, and 2010 to 2008 (all P<0.005), but not 2009 to 2008.ConclusionIncremental changes in incidence rate level during the declining incidence periods of 2009 and 2010 can potentially be attributed to a few factors. The more steeply declining slope in 2010 compared with previous years could be ascribed to the implementation of more effective interventions and preventive strategies in 2010. Further investigation is required to examine this possibility.