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Severe COVID-19: Immunosuppression or Hyperinflammation?
Ye Liu1,2, Yiming Li1,2, Dongxue Xu1,2
1Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.
Insights
Severe coronavirus disease 2019 (COVID-19) presents paradoxical immune states, including immunosuppression and hyperinflammation. Understanding these immune responses is crucial for developing effective COVID-19 treatments.
Area of Science:
- Immunology
- Virology
- Pathophysiology
Background:
- The COVID-19 pandemic poses significant challenges, particularly in managing severe cases.
- Understanding the complex immune responses in severe COVID-19 is critical for effective treatment.
Purpose of the Study:
- To review the literature on diverse immune states in COVID-19 patients.
- To elucidate the pathophysiological mechanisms underlying these immune alterations.
- To discuss the implications for immunotherapy strategies.
Main Methods:
- Comprehensive literature review of studies on COVID-19 immunity.
- Analysis of pathophysiological mechanisms related to immune dysregulation.
- Evaluation of the link between immune status and disease severity.
Main Results:
- Severe COVID-19 exhibits paradoxical immune states: lymphocytopenia (immunosuppression) and cytokine storms (hyperinflammation).
- Severe Acute Respiratory Syndrome Coronavirus 2 directly impacts immune cells, contributing to immune dysfunction.
- Immune status correlates with disease development, severity, and response to treatment.
Conclusions:
- The dual immune state in severe COVID-19 necessitates tailored therapeutic approaches.
- Further research into immune modulation is vital for improving patient outcomes.
- Targeting specific immune pathways may offer novel treatment strategies for severe COVID-19.
Abstract:
The ongoing coronavirus disease 2019 (COVID-19) pandemic has swept over the world and causes thousands of deaths. Although the clinical features of COVID-19 become much clearer than before, there are still further problems with the pathophysiological process and treatments of severe patients. One primary problem is with the paradoxical immune states in severe patients with COVID-19. Studies indicate that Severe Acute Respiratory Syndrome Coronavirus 2 can attack the immune system, manifested as a state of immunosuppression with a decrease in lymphocytes, whereas a state of hyperinflammation, presenting as elevated cytokine levels, is also detected in COVID-19. Therefore, discussing the specific status of immunity in COVID-19 will contribute to the understanding of its pathophysiology and the search for appropriate treatments. Here, we review all the available literature concerning the different immune states in COVID-19 and the underlying pathophysiological mechanisms. In addition, the association between immune states and the development and severity of disease as well as the impact on the selection of immunotherapy strategies are discussed in our review.
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