Redox stress in COVID-19: Implications for hematologic disorders

Area of Science:

• Hematology
• Infectious Diseases
• Biochemistry

Background:

• COVID-19, caused by SARS-CoV-2, increases thrombotic event risk, leading to organ failure.
• The impact of SARS-CoV-2 on the redox environment in hematologic conditions remains unclear.
• Understanding redox mechanisms is crucial for managing COVID-19 complications.

Purpose of the Study:

• To review the redox mechanisms involved in SARS-CoV-2 infection, coagulopathy, and inflammation.
• To identify sources of oxidant generation in various blood cells and endothelial cells.
• To discuss the role of reactive cysteines in SARS-CoV-2 and therapeutic implications.

Main Methods:

• Literature review focusing on redox biology, viral infections, and hematologic disorders.
• Analysis of oxidant generation pathways in hematopoietic and non-hematopoietic cells.
• Examination of oxidative cysteine modification in SARS-CoV-2 and its therapeutic relevance.

Main Results:

• SARS-CoV-2 infection influences the cellular redox environment, contributing to inflammation and thrombosis.
• Leukocytes, platelets, red blood cells, and endothelial cells are significant sources of oxidants.
• Reactive cysteines in SARS-CoV-2 present potential targets for therapeutic intervention.
• Sickle cell disease exacerbates COVID-19 treatment challenges due to its prothrombotic redox state.

Conclusions:

• Redox mechanisms play a critical role in the pathogenesis of COVID-19-associated thrombosis in hematologic disorders.
• Targeting redox pathways may offer novel therapeutic strategies for COVID-19 in patients with hematologic conditions.
• Further research into redox modulation is warranted for improved patient outcomes.