3D打印多孔钛支架修复牙槽骨缺损的实验研究

目的 观察和分析比格犬下颌骨牙槽骨缺损植入3D打印多孔钛支架后的成骨效果.方法 选取3只比格犬,拔除双侧下颌P1-M13个月,6侧下颌骨随机分为三组,A组(多孔钛支架),B组(多孔钛支架+覆盖Bio-Gide膜),C组(对照组).设计10 mm×5 mm的牙槽骨缺损,植入3D打印多孔钛支架3个月后处死比格犬获取组织标本...     

脂溢性角化病造模方法研究进展

脂溢性角化病是常见的皮肤良性肿瘤之一,病因及发病机制尚不清楚。为探索其发病机制及有效治疗药物,众多研究者建立了脂溢性角化病模型,如基因工程小鼠模型、紫外线诱导模型、异种移植模型、原代细胞模型等,现对近年来的模型作一综述。     

婴儿动脉导管未闭的介入治疗

目的 总结婴儿行动脉导管未闭(patent arterial duct,PDA)堵闭术的临床经验.方法 PDA 29例,年龄在1岁以下,体重4.5～10.5 kg,PDA最窄处直径2.0～7.4 mm,其中合并肺动脉高压13例,行蘑菇伞型封堵器封堵术.结果 所有病例1次封堵成功,术后即时升主动脉造影,发现有微量残余分流3例,术后3 d消失,1例有中量残余分流伴肉眼血尿,24 h后血尿消失,1个月后仅存微量残余分流,无其他并发症出现.结论 介入治疗对婴儿PDA疗效良好.     

睡眠时间与冠心病发病及死亡风险前瞻性研究的Meta分析

目的:通过常规Meta分析和量效Meta分析评估睡眠时间与冠心病发病及死亡风险的相关性.方法:计算机检索EMBASE、PubMed、Cochrane、Web of Science、万方、维普、中国生物医学文献数据库及中国知网数据库,筛选关于睡眠时间与冠心病相关性的前瞻性队列研究文献,并将长睡眠时间和短睡眠时间分别定义为...     

河南省非订单定向全科住院医师规范化培训结业学员的就业状况及影响因素研究

背景 全科医生数量和质量是人力资源管理的两个重要维度,其中,医生数量的新增、保持和流失,是全科人力动态规划、管理和评价的重要考量,也是全科住院医师规范化培训(简称全科住培)的绩效指标。探讨全科住培学员的就业状况及影响因素,可以为今后住培政策和激励机制的制定提供参考,但目前针对非订单定向全科住培学员的相关研究较为缺乏。目的 了解河南省非订单定向全科住培学员的就业状况,分析学员结业后未从事全科医学相关工作的原因,从而为完善培训管理和人力资源激励机制提供参考。方法 于2021年8月,采用分层随机整群抽样法,在河南省选取2014—2017年入培且已结业的非订单定向全科住培学员326例进行问卷调查。问卷由课题组自行设计,主要内容为学员的基本信息、全科住培情况、目前工作情况及结业后从事与未从事全科医学相关工作的原因。问卷通过“问卷星”平台发放,由学员自行填写。结果 共发放问卷326份,回收有效问卷271份(83.1%)。结业后,从事全科医学相关工作者77例(28.4%),从事非全科医学相关工作者194例(71.6%)。多因素Logistic回归分析结果显示,年龄、文化程度、生源类型、全科住培基地所...     

Analysis of Esophageal Motility and Reflux Characteristics in Patients with Gastroesophageal Reflux Disease With or Without Extraesophageal Symptoms

Background: The pathogenesis of extraesophageal symptoms of gastroesophageal reflux disease is complex, and esophageal motility and reflux may be involved in it. In this study, we aimed to compare esophageal motility and reflux characteristics in gastroesophageal reflux disease patients with and without extraesophageal symptoms by high-resolution manometry and multichannel intraluminal impedance-pH monitoring.Methods: We retrospectively studied gastroesophageal reflux disease patients between January 2014 and December 2018. All patients had undergone high-resolution manometry and multichannel intraluminal impedance-pH monitoring. The results were compared and analyzed.Results: A total of 59 patients were included in this study. Patients were divided into 3 groups according to their main complaint: only typical symptoms (group A, n = 11), both typical and extraesophageal symptoms (group B, n = 33), and only extraesophageal symptoms (group C, n = 15). Compared with group A, the lower esophageal sphincter basal pressure, integrated residual pressure, and lower esophageal sphincter length were lower, and the proximal reflux percentages of a weak acid and non-acid reflux were higher in group B and group C (P < .017). The positive rate of esophageal motility disorders was lower in group A than in other groups (P < .05). The proportion of patients with multiple rapid swallows/single swallow—distal contractile integral ratio greater than 1—was higher in group A than in other groups (P < .05).Conclusions: Decreased lower esophageal sphincter pressure and lower esophageal sphincter length, increased proximal esophageal reflux of weak acid and non-acid reflux, esophageal motility disorders, and decreased peristaltic reserve are involved in the pathogenesis of extraesophageal symptoms of gastroesophageal reflux disease.     

逊克县边疆俄罗斯民族村蜱携带斑点热群立克次体的调查

目的 调查黑龙江逊克县边疆俄罗斯民族村蜱携带斑点热群立克次体的调查.方法 采集2017年4-6月418只活蜱样本,利用PCR方法分别扩增斑点热群立克次体(SFGR)3种不同目的 基因的特异性片段,通过基因测序进一步鉴定.结果 在所有蜱中共检出斑点热群立克次体核酸阳性样本93例,经SFGR 3种不同目的 基因测序对比确定...     

增免抑瘤颗粒剂干预卵巢癌大剂量化疗后免疫及骨髓抑制的实验研究

目的探讨增免抑瘤颗粒剂对卵巢癌SKOV3荷瘤小鼠顺铂（DDP）化疗后免疫及骨髓抑制的改善情况。方法建立卵巢癌SKOV3荷瘤小鼠模型,测定小鼠单次腹腔注射DDP的LD50。取40只造模成功的荷瘤鼠,随机分为DDP组、ZMYL高、中、低剂量合并DDP组,每组10只,各组均予DDP LD50值单次腹腔注射。注射后次日开始灌胃给药,ZMYL高、中、低剂量组的给药剂量分别为24.0g/kg、12.0g/kg、6.0g/kg,DDP组灌以等量的0.9%NaC l溶液,共干预8天。观察荷瘤小鼠存活时间、存活率、脾脏指数及骨髓DNA含量、血常规等指标变化情况,应用荧光标记的单克隆抗体染色结合流式细胞仪测定外周血T淋巴细胞亚群比例。结果①DDP腹腔注射LD50为16.36 mg/kg,95%可信限为13.22mg/k-20.39 mg/kg。②各组生存时间以及存活率差异均无统计学意义（P〉0.05）。③与DDP组比较,各剂量ZMYL＋DDP组均可提高荷瘤小鼠脾脏指数,中高剂量组还可提高骨髓DNA含量,差异均有统计学意义（P〈0.05）。④与DDP组比较,各剂量ZMYL＋DDP组均可提高荷瘤小鼠外周血中白细胞数,差异均有统计学意义（P〈0.05）。⑤与DDP组比较,各剂量ZMYL＋DDP组的CD3、CD4、CD8及CD4/CD8差异无统计学意义（P〉0.05）。结论 ZMYL对顺铂大剂量化疗引起的荷瘤小鼠外周血白细胞减少及骨髓DNA含量、脾脏指数的降低有明显的升高作用,能调节机体紊乱的免疫功能,改善骨髓抑制。     

Louki Zupa decoction attenuates the airway inflammation in acute asthma mice induced by ovalbumin through IL-33/ST2-NF-κB/GSK3β/mTOR signalling pathway

ContextAsthma is a common respiratory system disease. Louki Zupa decoction (LKZP), a traditional Chinese medicine, presents a promising efficacy against lung diseases.ObjectiveTo investigate the pathogenic mechanism of asthma and reveal the intervention mechanism of LKZP.Materials and methodsForty-eight female Balb/c mice were randomly divided into 6 groups: normal control group (NC), ovalbumin (OVA)/saline asthma model group, OVA/LL group, OVA/LM group, OVA/LH group and OVA/DEX group (n = 8 per group). The asthmatic mice were modelled through intraperitoneal injecting and neutralizing OVA. LKZP decoction was administrated by gavage at the challenge stage for seven consecutive days (2.1, 4.2 and 8.4 g/kg/day). We investigated the change in lung function, airway inflammation, mucus secretion and TH-1/TH-2-related cytokines. We further verify the activated status of the IL-33/ST2/NF-κB/GSK3β/mTOR signalling pathway.ResultsLKZP was proved to improve asthmatic symptoms, as evidenced by the down-regulated airway resistance by 36%, 58% and 53% (p < 0.01, p < 0.001 vs. OVA/saline group), up-regulated lung compliance by 102%, 114% and 111%, decreased airway inflammation and mucus secretion by 33%, 40% and 33% (p < 0.001 vs. OVA/saline group). Moreover, the content of cytokines in BALF related to airway allergy (such as IgE) and T helper 1/T helper 2 cells (like IL-2, IL-4, IL-5, IL-13, TNF-α and IFN-γ), were also markedly reduced by 13–65% on LKZP intervention groups compared with model group. Mechanistic research revealed that the IL-33/ST2-NF-κB/GSK3β/mTOR signalling pathway was activated in the OVA/saline group and LKZP significantly down-regulated this pathway.Discussion and conclusionLKZP improves lung function, airway inflammation, mucus secretion and correct immune imbalance by intervening with the IL-33/ST2-NF-κB/GSK3β/mTOR signalling pathway, presenting a promising therapeutic choice for asthma.