《LANCET,4月17日,Endothelial cell infection and endotheliitis in COVID-19》

  • 来源专题:COVID-19科研动态监测
  • 编译者: xuwenwhlib
  • 发布时间:2020-04-18
  • Endothelial cell infectionand endotheliitis in COVID-19

    Published online April 17, 2020 https://doi.org/10.1016/S0140-6736(20)30937-5

    Cardiovascular complications are rapidly emerging as a key threat in coronavirus disease 2019 (COVID-19) in addition to respiratory disease.The mechanisms underlying the disproportionate effect of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection on patientswith cardiovascular comorbid -ities, however, remain incompletely

    understood.1,2

  • 原文来源:https://www.thelancet.com/lancet/article/s0140-6736(20)30937-5
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  • 《4月17日_COVID-19患者中的内皮细胞感染和内皮炎》

    • 来源专题:COVID-19科研动态监测
    • 编译者:zhangmin
    • 发布时间:2020-04-19
    • 1.时间:2020年4月17日 2.机构或团队:苏黎世大学医院、哈佛医学院附属布列根和妇女医院 3.事件概要: 《柳叶刀》于4月17日在线出版了苏黎世大学医院等的通讯文章“Endothelial cell infection and endotheliitis in COVID-19”, 文章指出,除呼吸系统疾病外,心血管并发症也迅速成为COVID-19的主要威胁。然而,SARS-CoV-2感染对心血管合并症患者的影响的作用机制尚不完全清楚。有研究发现内皮细胞也表达ACE2受体。目前尚不知道COVID-19患者中的血管紊乱是否是由于内皮细胞受病毒侵袭引起的。但有趣的是,SARS-CoV-2可以在体外直接感染工程化人类血管类器官。本文中,研究人员通过对三位COVID-19患者的组织学分析证明了内皮细胞在不同器官血管床中的受累情况。 研究人员表示其发现了病毒直接感染内皮细胞和弥漫性内皮炎症的证据。尽管SARS-CoV-2病毒利用肺泡上皮细胞表达的ACE2受体感染宿主,从而引起肺损伤,但ACE2受体也在穿越多个器官的内皮细胞中广泛表达。通过内皮细胞的病毒直接感染或免疫介导的免疫细胞募集都可导致广泛的与细胞凋亡相关的内皮功能障碍。 该研究结果表明,病毒成分存在于内皮细胞中,并且在炎症细胞中积累,并有内皮细胞和炎性细胞死亡的迹象。文章指出,这些发现表明,SARS-CoV-2感染促进了几个器官中的内皮炎的诱导,这是病毒参与和宿主炎症反应的直接结果。另外,细胞凋亡和细胞焦亡的诱导可能在COVID-19患者的内皮细胞损伤中起重要作用。COVID-19引起的内皮炎可能解释了COVID-19患者不同血管床的全身微循环功能受损及其临床后遗症。文章表示,该假设为在抑制病毒复制的同时稳定内皮细胞的疗法提供了理论依据,尤其是使用抗炎抗细胞因子药物,ACEI抑制剂和他汀类药物。这种策略可能特别适用于与已有内皮功能障碍的易感患者,内皮功能障碍与男性、吸烟、高血压、糖尿病、肥胖和已确定的心血管疾病有关,所有这些都与COVID-19中的不良后果有关。 4.附件: 原文链接:https://www.thelancet.com/lancet/article/s0140-6736(20)30937-5
  • 《LANCET,3月17日,COVID-19 in pregnant women – Authors' reply》

    • 来源专题:COVID-19科研动态监测
    • 编译者:zhangmin
    • 发布时间:2020-03-18
    • COVID-19 in pregnant women – Authors' reply David Baud Eric Giannoni Léo Pomar Xiaolong Qi Karin Nielsen-Saines Didier Musso et al. Show all authors Published:March 17, 2020DOI:https://doi.org/10.1016/S1473-3099(20)30192-4 We are grateful for the concerns of Manuel Schmidt and colleagues about our previous guidelines1 for pregnant women with suspected severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. At the time we developed the algorithm (February, 2020), there were no data regarding potential vertical transmission from infected mothers and outcomes in newborns. To date, there has been no evidence of vertical transmission of coronavirus disease 2019 (COVID-19) based on two small clinical series.2, 3 According to WHO, delayed umbilical cord clamping is highly unlikely to increase the risk of transmitting pathogens from the mother to the fetus even in the case of maternal infection.4 Because the vernix caseosa contains antimicrobial peptides, we recommend leaving it in place until 24 h after birth.5 New data examining neonates from infected mothers could be reassuring, but transmission after birth via contact with infectious respiratory secretions is still a concern, and physical separation of mother from child should be considered. Separation is a standard practice in pulmonary tuberculosis and is discussed in cases of maternal influenza infection.6 Therefore, separation of the mother and her newborn baby should be individually discussed by an interdisciplinary team, considering local facilities and risk factors for adverse neonatal outcomes, such as prematurity and fetal distress.