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COVID-19 cytokine storm: The anger of inflammation
Open accessAbstract
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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“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]
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“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]
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“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]
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“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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Acedera, M. L., Sirichokchatchawan, W., Brimson, S. J., & Prasansuklab, A. (2023) · Heliyon · doi:10.1016/j.heliyon.2023.e15233 · Cited by 7
“Cytokine storm was a phenomenon linked to the increased levels of ferritin, CRP, and other inflammatory blood biomarkers [38, 39], as well as ARDS, a phenomenon that identified patients in critical COVID-19 state [40], further worsening to ICU support and ultimately death [41].”
Deus, M. D. C., Gadotti, A. C., Dias, E. S., Alegre, J. B. M., Spitzenbergen, B. A. K. V., Bohnen, G., Tozoni, S. S., Stocco, R. B., Olandoski, M., Tuon, F. F., et al. (2024) · International Journal of Molecular Sciences · doi:10.3390/ijms251910578 · Cited by 7
“Virus binding to the ACE2 receptor also induces TGF-β expression [23,24], promoting differentiation of naive CD4+ T cells into T helper 17 (Th-17) cells, which produce cytokines like IL-17, GM-CSF, IL-21, and IL-2 [25].”
BackgroundWhy Does SARS-CoV-2 Infection Induce Autoantibody Production?
Macela, A., & Kubelková, K. (2021) · Pathogens · doi:10.3390/pathogens10030380 · Cited by 7
Khatchadourian, C., Sisliyan, C., Nguyen, K., Poladian, N., Tian, Q., Tamjidi, F., Luong, B., Singh, M., Robison, J., & Venketaraman, V. (2021) · Clinics and Practice · doi:10.3390/clinpract11040085 · Cited by 9
SILVA, A. V. B. D., Campanati, J. D. A. G., Barcelos, I. D. S., Santos, A. C. L., DEUS, U. P. D., Soares, T. D. J., & Amaral, L. S. D. B. (2022) · Anais da Academia Brasileira de Ciências · doi:10.1590/0001-3765202220211501 · Cited by 7
Shi, S., Hu, H., Wang, J., Huang, X., Li, J., & Li, D. (2023) · Virology Journal · doi:10.1186/s12985-023-02192-y · Cited by 7
“The data analysis of this study was mainly implemented through SPSS (IBM SPSS Statistics 25).”
BackgroundMethodClinical features, pathogenesis and treatment of long-haul COVID‑19 impact on nervous system
Barinov, A. N., Moshkhoeva, L. S., Васильевна, П. Е., Emikh, E. V., & Yastrebtseva, I. P. (2021) · Medical alphabet · doi:10.33667/2078-5631-2021-3-14-22 · Cited by 6
Luz, M. S., Lemos, F. F. B., Pinheiro, S. L. R., Marques, H. S., Silva, L. G. D. O., Calmon, M. S., Evangelista, K. D. C., & de Melo, F. F. (2023) · World Journal of Virology · doi:10.5501/wjv.v12.i3.193 · Cited by 6
Zurlo, M., Nicoli, F., Borgatti, M., Finotti, A., & Gambari, R. (2022) · International Journal of Molecular Medicine · doi:10.3892/ijmm.2022.5088 · Cited by 6
Mortality Predictors Among COVID-19 Elderly in Taif, Saudi Arabia
Bakhshwin, D., Alotaibi, M., Ali, A. S., Althomali, A. A., Alsuwat, A., Alhamyani, A., Alwathnani, A., Alsaggaf, S., & Alrafiah, A. (2022) · Infection and Drug Resistance · doi:10.2147/idr.s364279 · Cited by 6
Murugan, D., & Rangasamy, L. (2022) · Molecular and Cellular Biochemistry · doi:10.1007/s11010-022-04601-2 · Cited by 6
Zhou, H., Xu, M., Hu, P., Li, Y., Ren, C., Li, M., Yang, P., Wang, S., & Liu, X. (2023) · Frontiers in Immunology · doi:10.3389/fimmu.2023.1172724 · Cited by 6
“Additionally, Ang (1–7) can reduce inflammation by blocking the NF-B pathway and cytokines (65).”
BackgroundAtemnkeng, F. N., Alataby, H., Demirjian, J., Kenne, F. M., & Nfonoyim, J. M. (2021) · Journal of Medical Cases · doi:10.14740/jmc3629 · Cited by 6
“When IL-6 binds to its receptors on the membrane of inflammatory cells, it may stimulate the activation of these cells via the Janus kinase/signal transducer and activator transcription (JAK/STAT) pathway, as well as the nuclear factor kappa B/mitogen-activated protein kinase (NF-KB/MAPK) pathway leading to exaggerate…”
BackgroundIndigenous sovereignty, data sourcing, and knowledge sharing for health
Smith-Morris, C. M., Juárez-López, B. M., Tapia, A., & Shahim, B. (2022) · Global Public Health · doi:10.1080/17441692.2022.2058049 · Cited by 6
COVID-19 Pandemic as an Indicator of «Blank Spots» in Epidemiology and Infectious Pathology
Васильевич, С. М. (2020) · Journal of NBC Protection Corps · doi:10.35825/2587-5728-2020-4-3-338-373 · Cited by 6
Chen, F., Qu, F., Jia, Y., Wang, C., Yu, Y., Liao, J., Min, L., Chen, F., & Zhi-jia, S. (2022) · Evidence-based Complementary and Alternative Medicine · doi:10.1155/2022/1240242 · Cited by 6
“immune response produced by the body to external stimuli, such as viral infection, and is characterized by high levels of immune cell activation and subsequent production of large amounts of cytokines and chemical mediators [5].”
BackgroundGuarnieri, J. W., Topper, M. J., Beigel, K., Haltom, J., Chadburn, A., Frere, J. J., An, J., Cope, H., Borczuk, A., Sinha, S., et al. (2023) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2023.10.08.561395 · Cited by 6
“One possible explanation for this widespread organ damage might be a chronic overactivation of RAAS 10,11 .”
BackgroundAlam, M., Choudhury, R., & Lamers, R.-J. A. N. (2022) · Current Research in Immunology · doi:10.1016/j.crimmu.2022.11.001 · Cited by 5
Murad, D., Paracha, R. Z., Saeed, T., Ahmad, J., Mushtaq, A., & Humayun, M. (2023) · PeerJ · doi:10.7717/peerj.15794 · Cited by 5
Patel, M. A., Daley, M. J., Nynatten, L. V., Slessarev, M., Cepinskas, G., & Fraser, D. D. (2024) · Clinical Proteomics · doi:10.1186/s12014-024-09488-3 · Cited by 5
Zhang, W., Wang, X., Ma, C., Liang, B., Ma, L., Wang, Y., Lin, Y., & Han, S. (2024) · Respiratory Physiology & Neurobiology · doi:10.1016/j.resp.2024.104346 · Cited by 5
“Acute respiratory distress syndrome, vascular leakage, multiple organ dysfunction syndrome, and mortality can all occur due to excessive inflammation (Mahmudpour et al., 2020; Ghanbarpour et al., 2014).”
BackgroundComplement is primarily activated in the lung in a mouse model of severe COVID-19
Szachowicz, P. J., Wohlford-Lenane, C., Donelson, C. J. H., Ghimire, S., Thurman, A. L., Xue, B., Boly, T. J., Verma, A., MašinoviĆ, L., Bermick, J., et al. (2025) · iScience · doi:10.1016/j.isci.2025.111930 · Cited by 6
“Reported pathophysiologic features of severe COVID-19 includeprothromboticcomplications, 10–13 ‘‘cytokinestorm,’’ 14,15 NETosis, 16 and excessive cytotoxic T cell responses, 17 all of which can be driven by complement activation.”
Krajewski, A., Mlynska-Krajewska, E., Kaczyńska, K., Strużyna, J., & Mazurek, M. J. (2021) · Journal of Investigational Allergology and Clinical Immunology · doi:10.18176/jiaci.0692 · Cited by 5
“We believe that IVIG and TPE could ameliorate the bradykinin or cytokine storm associated with COVID-19 by immunomodulating cytokine activity (IL-6, TNF-a) and by eliminating exogenous antigens [8-10].”
BackgroundEarly vs. Late Onset Cardiac Injury and Mortality in Hospitalized COVID-19 Patients in Wuhan
Sun, W., Zhang, Y., Wu, C., Wang, S., Xie, Y., Zhang, D., Yuan, H., Zhang, Y., Cui, L., Li, M., et al. (2021) · Frontiers in Cardiovascular Medicine · doi:10.3389/fcvm.2021.645587 · Cited by 5
miRNA-223-3p, miRNA- 2909 and Cytokines Expression in COVID-19 Patients Treated with Ivermectin
Rezk, N. A., Sileem, A. E., Gad, D., & Khalil, A. (2021) · Zagazig University Medical Journal · doi:10.21608/zumj.2021.92746.2329 · Cited by 5
“The attachment of angiotensin-converting enzyme-related carboxypeptidase-2 (ACE2) receptor to the SARS-CoV-2 spike protein is the first signal in the inflammatory stage leading to the activation of the ACE/Ang II/AT1R axis followed by stimulation of IL-6/STATs axis causing NF-κB hyper-activation [4,5].”
BackgroundDamage to the Vascular Endothelium as a Leading Mechanism of COVID-19 Systemic Pathology
Гомазков, О. А. (2021) · Biology Bulletin Reviews · doi:10.1134/s2079086421060049 · Cited by 5
“New data indicate the special role of ANG(1–7) and bradykinin as initiators of proinflammatory reactions (Mahmudpour et al., 2020).”
BackgroundEffect of Expanded Hemodialysis with Theranova® in Patients with COVID-19
Salazar, M. L. S., Portolés, J. M., Recio, M. D. V., Rosado, S., Carratalá, M. R. L., Bernabéu-Andréu, F. A., Sánchez, A., & Sánchez, P. L. (2022) · Blood Purification · doi:10.1159/000520891 · Cited by 5
Endothelial dysfunction and angiogenesis: what is missing from COVID-19 and cannabidiol story?
Nakhaei, N. A., Najarian, A., Farzaei, M. H., & Norooznezhad, A. H. (2022) · Journal of Cannabis Research · doi:10.1186/s42238-022-00129-w · Cited by 5
“From a pathophysiological point of view, cytokine storm or the excessive release of proinflammatory cytokines is very crucial to the pathogenesis of many morbidities and even mortality in patients diagnosed with COVID-19 (Mahmudpour et al. 2020).”
BackgroundHuman Cell Organelles in SARS-CoV-2 Infection: An Up-to-Date Overview
Gorący, A., Rosik, J., Szostak, B., Ustianowski, Ł., Ustianowska, K., & Gorący, J. (2022) · Viruses · doi:10.3390/v14051092 · Cited by 5
The significance of antiglobulin (Coombs) test reactivity in patients with COVID-19
Hafez, W., Ziade, M. A., Arya, A., Saleh, H., & Abdelrahman, A. (2022) · Immunobiology · doi:10.1016/j.imbio.2022.152240 · Cited by 5
“Several mechanisms could account for this, including altered iron metabolism induced by immune modulators such as IL-1, IL-6, and activin B, followed by hepcidin production and decreased iron transfer for erythropoiesis.”
InfluentialGevi, F., Fanelli, G., Lelli, V., Gianpaolo, Z., Tiberi, M., Molfetta, V. D., Scapigliati, G., & Maria, T. A. (2023) · Scientific Reports · doi:10.1038/s41598-022-26156-4 · Cited by 5
Stuardo-Parada, A., López‐Muñoz, R., Villarroel‐Espíndola, F., Figueroa, C. D., & Ehrenfeld, P. (2023) · Medical Oncology · doi:10.1007/s12032-023-02090-x · Cited by 5
Relational interaction between T-lymphocytes and SARS-CoV-2: A review
Chaple, A. R., Vispute, M. M., Mahajan, S., Mushtaq, S., Muthuchelvan, D., Ramakrishnan, M. A., & Sharma, G. K. (2021) · Acta Virologica · doi:10.4149/av_2021_202 · Cited by 5
“…with hyper inflammation overwhelming cytokine response in sARs-CoV-2 is the central component in hyper inflammation (mangalmurti & hunter, 2020; mahmudpour et al., 2020; Ragab et al., 2020; ye et al., 2020). il-6, pluripotent cytokines perform a formidable job in the shaping of the tfh cells,…”
BackgroundSingh, A., Chidharla, A., Agarwal, K., Singh, P. R., Jain, N., Hassen, G., Abdelwahed, S., Bhandari, R., Patel, K., Gupta, S., et al. (2022) · Cureus · doi:10.7759/cureus.24133 · Cited by 5
“highlighted the presence of a “cytokine storm”, which is an out-of-control release of inflammatory cytokine as one of the hallmarks of COVID-19 infection [29-31].”
BackgroundInsights into COVID-19: Perspectives on Drug Remedies and Host Cell Responses
Awad, A. M., Hansen, K., Rio, D. D., Flores, D., Barghash, R. F., Kakkola, L., Julkunen, I., & Awad, K. (2023) · Biomolecules · doi:10.3390/biom13101452 · Cited by 5
Székács, B., Várbı́ró, S., & Debreczeni, L. (2021) · Physiology International · doi:10.1556/2060.2021.00007 · Cited by 5
“The high mortality rate of elderly vulnerable hypertensive patients infected with acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is often associated with cytokine storm [1].”
Encephalopathy at admission predicts adverse outcomes in patients with SARS‐CoV‐2 infection
Tang, L., Liu, S., Xiao, Y., Tran, T. M. L., Choi, J. W., Wu, J., Halsey, K., Huang, R. Y., Boxerman, J. L., Patel, S. H., et al. (2021) · CNS Neuroscience & Therapeutics · doi:10.1111/cns.13687 · Cited by 5
Tailoring glucocorticoids in patients with severe COVID-19: a narrative review
Luo, M.-H., Qian, Y.-Q., Huang, D.-L., Luo, J., Su, Y., Wang, H., Yu, S.-J., Liu, K., Tu, G.-W., & Luo, Z. (2021) · Annals of Translational Medicine · doi:10.21037/atm-21-1783 · Cited by 5
“In this COVID-19 pandemic, the current evidence indicates that inflammation is a prominent pathophysiological process (59), with acute respiratory distress syndrome (ARDS) observed in over 70% of ICU patients and 90% of nonsurvivors (60).”
Metadata
- 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)
- PMC
- PMC7260598
- OpenAlex
- W3030136428
- Cited by
- 461
- References
- 140
- Citations by year
- 2026: 8 · 2025: 18 · 2024: 47 · 2023: 61 · 2022: 104 · 2021: 168 · 2020: 52
- FWCI
- 4.55
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- 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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