Cited by 461COVID-19 Clinical Research StudiesSARS-CoV-2 and COVID-19 ResearchRenin-Angiotensin System Studies

COVID-19 cytokine storm: the anger of inflammation

Open access
Mahmudpour, Mehdi, Roozbeh, Jamshid, Keshavarz, Mohsen, Farrokhi, Shokrollah, Nabipour, Iraj·2020·Cytokine

Abstract

Patients with COVID-19 who require ICU admission might have the cytokine storm. It is a state of out-of-control release of a variety of inflammatory cytokines. The molecular mechanism of the cytokine storm has not been explored extensively yet. The attachment of SARS-CoV-2 spike glycoprotein with angiotensin-converting enzyme 2 (ACE2), as its cellular receptor, triggers complex molecular events that leads to hyperinflammation. Four molecular axes that may be involved in SARS-CoV-2 driven inflammatory cytokine overproduction are addressed in this work. The virus-mediated down-regulation of ACE2 causes a burst of inflammatory cytokine release through dysregulation of the renin-angiotensin-aldosterone system (ACE/angiotensin II/AT1R axis), attenuation of Mas receptor (ACE2/MasR axis), increased activation of [des-Arg9]-bradykinin (ACE2/bradykinin B1R/DABK axis), and activation of the complement system including C5a and C5b-9 components. The molecular clarification of these axes will elucidate an array of therapeutic strategies to confront the cytokine storm in order to prevent and treat COVID-19 associated acute respiratory distress syndrome.

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Crossref · 10.1016/j.cyto.2020.155151

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  • IL-6 is a major player in chronic inflammatory diseases, autoimmune diseases, cancer and cytokine storm.

    “Among them, IL-6 is a major player in chronic inflammatory diseases, autoimmune diseases, cancer and cytokine storm (1, 3, 10–26).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [13]

    The ACE/Angiotensin II/AT1R axis section describes IL-6 signaling as part of a mechanism that induces cytokine storm in severe COVID-19. The Introduction also reports higher IL-6 levels in patients who died of COVID-19 than in those who recovered. These passages support the cytokine-storm part of the claim, but the paper does not establish IL-6 as a major player in chronic inflammatory diseases, autoimmune diseases, or cancer. (LLM, conf=0.87)

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  • SARS-CoV-1 and SARS-CoV-2 infection activate both NF-κB and STAT3, key elements of the IL-6 Amp, to cause cytokine storm.

    “Therefore, SARS-CoV-1 and SARS-CoV-2 infection activate both NF-κB and STAT3, key elements of the IL-6 Amp, to cause cytokine storm (12, 13, 15, 349, 350).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [13]

    The ACE/Angiotensin II/AT1R axis section describes SARS-CoV-2 activating NF-κB and STAT3, with their simultaneous activation driving the IL-6 amplifier and cytokine storm. The copy does not extend that mechanism to SARS-CoV-1; its Introduction mentions SARS-CoV in connection with immune responses, not this pathway. Page numbers were not provided. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • ARDS in COVID-19 is considered the result of cytokine storm, resembling the disease caused by SARS-CoV-1 and Middle East respiratory syndrome coronavirus.

    “ARDS in COVID-19 is considered the result of cytokine storm (12–17), resembling the disease caused by SARS-CoV-1 and Middle East respiratory syndrome coronavirus (MERS-CoV) (335).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [13]

  • Severe COVID-19 is a cytokine storm syndrome.

    “Consistent with the notion that severe COVID-19 is a cytokine storm syndrome (12–17, 336), the severity of COVID-19 is associated with an increased level of inflammatory cytokines, such as IL-6, granulocyte macrophage colony-stimulating factor (GM-CSF) and TNFα (333, 337).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [13]

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Research works printed but not linked: 3

  1. [17]Gheblawi M. Wang K. Viveiros A. Nguyen Q. Zhong J.-C. Turner A.J. Raizada M.K. Grant M.B. Oudit G.Y. Angiotensin Converting Enzyme 2: SARS-CoV-2 Receptor and Regulator of the Renin-Angiotensin System Circ. Res. 2020 PMC7188049 32264791
  2. [66]Peiró C. Moncada S. Substituting Angiotensin-(1–7) to Prevent Lung Damage in SARSCoV2 Infection? Circulation 2020 PMC7243666 32242749
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Authors
Mahmudpour, M., Roozbeh, J., Keshavarz, M., Farrokhi, S., & Nabipour, I.
Affiliations
  • Bushehr University of Medical Sciences (IR)
  • Shiraz University of Medical Sciences (IR)
  • Iranian Academy of Medical Sciences (IR)
Corresponding author
Nabipour, Iraj
Venue
Cytokine
Publisher
Elsevier BV
Published
2020-09
Volume
133
Pages
155151
ISSN
1043-4666 (ISSN-L)
OpenAlex
W3030136428
Cited by
461
References
140
Citations by year
2026: 8 · 2025: 18 · 2024: 47 · 2023: 61 · 2022: 104 · 2021: 168 · 2020: 52 · 2018: 2
FWCI
4.55
Type
journal article
Language
en
Open access
Locations
  • Cytokine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Bushehr University of Medical Sciences
Topics
  • Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
Keywords
COVID-19 pandemic, cytokine storm, SARS-CoV-2, hyperinflammation, ACE2, renin-angiotensin-aldosterone system, Mas receptor, bradykinin B1 receptor, complement system, C5a, membrane attack complex, acute respiratory distress syndrome, intensive care unit patients, treatment options
MeSH terms
Betacoronavirus, Angiotensin-Converting Enzyme 2, COVID-19, SARS-CoV-2, Proto-Oncogene Mas, Bradykinin, Humans, Inflammation, Peptidyl-Dipeptidase A, Models, Molecular, Pneumonia, Viral, Proto-Oncogene Proteins, Renin-Angiotensin System, Complement C5a, Cytokines, Coronavirus Infections, Receptors, G-Protein-Coupled, Complement C5b, Pandemics, Spike Glycoprotein, Coronavirus

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