Monocytes and Macrophages in COVID-19.
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In this article, the authors outline current knowledge on monocytes and macrophages in homeostasis and viral infections and summarize concepts and key findings on their role in COVID-19.Abstract:
COVID-19 is a contagious viral disease caused by SARS-CoV-2 that led to an ongoing pandemic with massive global health and socioeconomic consequences. The disease is characterized primarily, but not exclusively, by respiratory clinical manifestations ranging from mild common cold symptoms, including cough and fever, to severe respiratory distress and multi-organ failure. Macrophages, a heterogeneous group of yolk-sac derived, tissue-resident mononuclear phagocytes of complex ontogeny present in all mammalian organs, play critical roles in developmental, homeostatic and host defense processes with tissue-dependent plasticity. In case of infection, they are responsible for early pathogen recognition, initiation and resolution of inflammation, as well as repair of tissue damage. Monocytes, bone-marrow derived blood-resident phagocytes, are recruited under pathological conditions such as viral infections to the affected tissue to defend the organism against invading pathogens and to aid in efficient resolution of inflammation. Given their pivotal function in host defense and the potential danger posed by their dysregulated hyperinflammation, understanding monocyte and macrophage phenotypes in COVID-19 is key for tackling the disease's pathological mechanisms. Here, we outline current knowledge on monocytes and macrophages in homeostasis and viral infections and summarize concepts and key findings on their role in COVID-19. While monocytes in the blood of patients with moderate COVID-19 present with an inflammatory, interferon-stimulated gene (ISG)-driven phenotype, cellular dysfunction epitomized by loss of HLA-DR expression and induction of S100 alarmin expression is their dominant feature in severe disease. Pulmonary macrophages in COVID-19 derived from infiltrating inflammatory monocytes are in a hyperactivated state resulting in a detrimental loop of pro-inflammatory cytokine release and recruitment of cytotoxic effector cells thereby exacerbating tissue damage at the site of infection.read more
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References
More filters
Journal ArticleDOI
Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China
Chaolin Huang,Yeming Wang,Xingwang Li,Lili Ren,Jianping Zhao,Yi Hu,Li Zhang,Guohui Fan,Jiuyang Xu,Xiaoying Gu,Zhenshun Cheng,Ting Yu,Jia'an Xia,Yuan Wei,Wenjuan Wu,Xuelei Xie,Wen Yin,Li Hui,Min Liu,Yan Xiao,Hong Gao,Li Guo,Jungang Xie,Guang-Fa Wang,Rongmeng Jiang,Zhancheng Gao,Qi Jin,Jianwei Wang,Bin Cao +28 more
TL;DR: The epidemiological, clinical, laboratory, and radiological characteristics and treatment and clinical outcomes of patients with laboratory-confirmed 2019-nCoV infection in Wuhan, China, were reported.
Journal ArticleDOI
Clinical Characteristics of Coronavirus Disease 2019 in China.
Wei-jie Guan,Zhengyi Ni,Yu Hu,Wenhua Liang,Chun-Quan Ou,Jianxing He,Lei Liu,Hong Shan,Chunliang Lei,David S.C. Hui,Bin Du,Lanjuan Li,Guang Zeng,Kowk-Yung Yuen,Ruchong Chen,Chun-Li Tang,Tao Wang,Ping-Yan Chen,Jie Xiang,Shiyue Li,Jinlin Wang,Zi-jing Liang,Yi-xiang Peng,Li Wei,Yong Liu,Ya-hua Hu,Peng Peng,Jian-ming Wang,Ji-yang Liu,Zhong Chen,Gang Li,Zhi-jian Zheng,Shao-qin Qiu,Jie Luo,Chang-jiang Ye,Shao-yong Zhu,Nanshan Zhong +36 more
TL;DR: During the first 2 months of the current outbreak, Covid-19 spread rapidly throughout China and caused varying degrees of illness, and patients often presented without fever, and many did not have abnormal radiologic findings.
Journal ArticleDOI
SARS-CoV-2 Cell Entry Depends on ACE2 and TMPRSS2 and Is Blocked by a Clinically Proven Protease Inhibitor
Markus Hoffmann,Hannah Kleine-Weber,Simon Schroeder,Nadine Krüger,Tanja Herrler,Sandra Erichsen,Tobias S. Schiergens,Georg Herrler,Nai Huei Wu,Andreas Nitsche,Marcel A. Müller,Christian Drosten,Christian Drosten,Stefan Pöhlmann +13 more
TL;DR: It is demonstrated that SARS-CoV-2 uses the SARS -CoV receptor ACE2 for entry and the serine protease TMPRSS2 for S protein priming, and it is shown that the sera from convalescent SARS patients cross-neutralized Sars-2-S-driven entry.
Journal ArticleDOI
A new coronavirus associated with human respiratory disease in China.
Fan Wu,Su Zhao,Bin Yu,Yan-Mei Chen,Wen Wang,Zhi gang Song,Yi Hu,Zhao Wu Tao,Jun Hua Tian,Yuan Yuan Pei,Ming Li Yuan,Yu Ling Zhang,Fa Hui Dai,Yi Liu,Qi Min Wang,Jiao Jiao Zheng,Lin Xu,Edward C. Holmes,Edward C. Holmes,Yong-Zhen Zhang,Yong-Zhen Zhang +20 more
TL;DR: Phylogenetic and metagenomic analyses of the complete viral genome of a new coronavirus from the family Coronaviridae reveal that the virus is closely related to a group of SARS-like coronaviruses found in bats in China.
Journal ArticleDOI
COVID-19: consider cytokine storm syndromes and immunosuppression
Puja Mehta,Daniel F. McAuley,Michael Brown,Emilie Sanchez,Rachel Tattersall,Rachel Tattersall,Jessica J Manson +6 more
TL;DR: Re-analysis of data from a phase 3 randomised controlled trial of IL-1 blockade (anakinra) in sepsis, showed significant survival benefit in patients with hyperinflammation, without increased adverse events.
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