前列腺源性ETS因子在哮喘及鼻黏膜炎性疾病中的研究进展

含SAM尖端结构域的E26转化特异性因子(SPDEF)是ETS转录因子家族的最新成员之一, SPDEF又称为前列腺源性ETS因子(PDEF),首次发现其在前列腺癌中高度表达,参与肿瘤细胞的增殖分化、迁移凋亡和血管形成。近年来研究发现SPDEF与杯状细胞增生和分化密切相关,是调控呼吸道黏液高分泌的核心因子。对SPDEF调控黏液高分泌的机制及其在呼吸道慢性炎性疾病中的研究进展做一综述,以期为呼吸道黏液高分泌疾病的发病机制和诊治提供新思路。     

Simulação de manejo de via aérea difícil para residentes: estudo comparativo prospectivo

Background and objectivesProcedural simulation training for difficult airway management offers acquisition opportunities. The hypothesis was that 3 hours of procedural simulation training for difficult airway management improves: acquisition, behavior, and patient outcomes as reported 6 months later.MethodsThis prospective comparative study took place in two medical universities. Second‐year residents of anesthesiology and intensive care from one region participated in 3 h procedural simulation (intervention group). No intervention was scheduled for their peers from the other region (control). Prior to simulation and 6 months later, residents filled‐out the same self‐assessment form collecting experience with different devices. The control group filled‐out the same forms simultaneously. The primary endpoint was the frequency of use of each difficult airway management device within groups at 6 months. Secondary endpoints included modifications of knowledge, skills, and patient outcomes with each device at 6 months. Intervention cost assessment was provided.Results44 residents were included in the intervention group and 16 in the control group. No significant difference was observed for the primary endpoint. In the intervention group, improvement of knowledge and skills was observed at 6 months for each device, and improvement of patient outcomes was observed with the use of malleable intubation stylet and Eschmann introducer. No such improvement was observed in the control group. Estimated intervention cost was 406€ per resident.ConclusionsA 3 h procedural simulation training for difficult airway management did not improve the frequency of use of devices at 6 months by residents. However, other positive effects suggest exploring the best ratio of time/acquisition efficiency with difficult airway management simulation.ClinicalTrials.gov IdentifierNCT02470195.     

A subjective analysis of participants’ views in a study of experimental modelling of imposed airway obstruction in infants and children

Deliberate airway obstruction is a well-recognised form of child abuse and one of the most common causes of death in cases of child homicide. Although classical signs such as petechial haemorrhages can be helpful in raising the suspicion of mechanical asphyxia, they are not always present. Therefore, distinguishing between bruising caused by accidents, medical conditions or non-accidental injury remains challenging. We aimed to characterise bruising patterns which are potentially more consistent with deliberate airway obstruction by means of an experimental modelling study. The first results of our project were previously published and demonstrated that bruising anywhere on the head may be consistent with deliberate upper airway obstruction. In this paper, we present the findings of a questionnaire carried out during the modelling to assess participants’ perception of force and consider how variables such as age, use of adjuncts and force distribution may affect bruising patterns in deliberate airway obstruction. Statistical analysis of our results showed that participants felt they were using less force in scenarios involving the infant rather than the child resuscitation dummy as well as when using adjuncts, meaning marks are likely to be more subtle. Therefore, in such cases it is important to examine for other signs of asphyxiation (such as petechiae) and consider the possibility that adjuncts might have been used which could make picking up localised injuries more difficult. Our results also showed that participants often felt force was not distributed evenly across the digits, reporting the greatest force through either the thumb in isolation or the thumb plus another digit in up to nearly 50% of cases. This suggests that just one or two bruises may be consistent with deliberate airway obstruction.     

系统性呼吸功能训练对哮喘-慢性阻塞性肺疾病重叠综合征患者肺功能及呼吸指标的影响

目的 探讨系统性呼吸功能训练对哮喘-慢性阻塞性肺疾病重叠综合征(asthma-COPD overlap syndrome,ACOS)患者肺功能和呼吸指标的影响。方法 选择笔者所在医院2019年5月-2020年10月收治的102例ACOS患者作为研究对象,采用随机数字表法将其分为对照组和研究组,各51例。对照组行常规护理,研究组在对照组基础上融合系统性呼吸功能训练。比较2组干预前后的肺功能指标和呼吸指标。结果 干预后,研究组的肺功能各项指标均明显优于对照组(P<0.05);气道阻力各项指标显著优于对照组(P<0.05),呼吸困难程度轻于对照组(Z=-2.996,P=0.003)。结论 对ACOS患者在护理过程中融合系统性呼吸功能训练,可明显降低患者气道阻力指标,对改善肺功能、缓解患者呼吸困难具有明显效果。     

Airway management,intensive care requirement,and corticosteroid use in cervicofacial infection. A Maxillofacial Trainee Research Collaborative (MTReC) study

Cervicofacial infection (CFI) is a frequently encountered presentation to Oral and Maxillofacial Departments (OMFS). The United Kingdom has recently seen cessation of all routine community dental treatment due to the Coronavirus (COVID-19) pandemic and consequently an initial modification of treatment received in secondary care. Subsequent airway difficulties and the need for level 2 High Dependency Unit (HDU) or level 3 Intensive Care Unit (ICU) is a concern to surgeons and anaesthetists alike. The availability of skilled staff and appropriate facilities can be variable. It is imperative to understand the resource implications of CFI with respect to airway management and critical care utilisation. Adequate provision is fundamental for optimal care. A national, multicentre, trainee-led audit was carried out across 17 hospitals in the UK from May to September 2017. Information recorded included demographic features, presentation, airway management, medical and surgical treatment, and steroid administration. One thousand and two presentations (1002) were recorded. Forty-five percent were female, with a mean (range) age of 37.5 years (0–94). Regarding surgical airway management, 63.4% had a standard intubation (oral 42%, nasal 21.4%). Awake fibreoptic intubation (AFOI) was performed in 28% and surgical airway required in 0.9%. Impending airway compromise at the time of presentation was 1.7%. Following surgical incision and drainage, 96.1% of patients returned to a general ward, 2.7% to Level 3, and 1.1% to Level 2 care. The return to theatre was 2.8%, and 0.7% required reintubation. There was an association between corticosteroid administration and duration of intubation. Those who received steroids were more likely to remain intubated postoperatively (p = 0.006), require a higher level of postoperative care (p < 0.001), and require a return to theatre (p = 0.019). Postoperatively, patients who received steroids were less likely to be extubated at the close of the procedure. Intubated patients who received multiple steroid doses postoperatively were extubated with less frequency those that received a single dose. To our knowledge, this dataset is the largest ever recorded for CFI. Our results showed a high requirement for advanced airway management in this cohort. The requirement for surgical airway was low, but the significance of this situation should not be underestimated. The relatively frequent need for care at levels 2 or 3 within this cohort also placed a significant demand on already overburdened resources. Knowledge of care requirements for these patients will inform resource planning.     

Formation and Function of Liquid-Like Viral Factories in Negative-Sense Single-Stranded RNA Virus Infections

Liquid–liquid phase separation (LLPS) represents a major physiochemical principle to organize intracellular membrane-less structures. Studies with non-segmented negative-sense (NNS) RNA viruses have uncovered a key role of LLPS in the formation of viral inclusion bodies (IBs), sites of viral protein concentration in the cytoplasm of infected cells. These studies further reveal the structural and functional complexity of viral IB factories and provide a foundation for their future research. Herein, we review the literature leading to the discovery of LLPS-driven formation of IBs in NNS RNA virus-infected cells and the identification of viral scaffold components involved, and then outline important questions and challenges for IB assembly and disassembly. We discuss the functional implications of LLPS in the life cycle of NNS RNA viruses and host responses to infection. Finally, we speculate on the potential mechanisms underlying IB maturation, a phenomenon relevant to many human diseases.     

Predictive value of the coronary artery calcium score and advanced plaque characteristics: Post hoc analysis of the PREDICT registry

BackgroundWhether coronary plaque characteristics assessed in coronary computed tomography angiography (CCTA) in association with the coronary artery calcium score (CACS) have predictive value for coronary events is unclear. We aimed to examine the predictive value of the CACS and plaque characteristics for the occurrence of coronary events.MethodsAmong 2802 patients who were analyzed in the PREDICT registry, 2083 with suspected coronary artery disease (CAD) were studied using post hoc analysis. High-risk plaques were defined as having ≥2 adverse characteristics, such as low computed tomographic attenuation, positive remodeling, spotty calcification, and napkin-ring sign. An adjudicative composite of coronary events (cardiac death, nonfatal acute coronary syndrome, and coronary revascularization ≥3 months after indexed CCTA) were analyzed.ResultsSeventy-three (3.5%) patients had coronary events and 313 (15.0%) had high-risk plaques. Multivariate Cox proportional hazard analysis showed that high-risk plaques remained an independent predictor of coronary events (adjusted hazard ratio [HR] 1.95, 95% confidence interval [CI] 1.13–3.34, P ?= ?0.0154), as well as the log-transformed CACS (adjusted HR 1.24, 95% CI 1.11–1.39, P ?= ?0.0002) and the presence of obstructive stenosis (adjusted HR 5.63, 95% CI 3.22–10.12, P 0.0001). In subgroup analyses, high-risk plaques were independently predictive only in the low CACS class (<100).ConclusionThis study shows that assessment of adverse features by coronary plaque imaging independently predicts coronary events in patients with suspected CAD and a low CACS. Our findings suggest that the clinical value of high-risk plaques to CACS and stenosis assessment appears marginal.