Red Blood Cell Function and Dysfunction: Redox Regulation, Nitric Oxide Metabolism, Anemia

Area of Science:

• Cardiovascular Science
• Hematology
• Redox Biology

Background:

• Anemia is increasingly correlated with severe cardiovascular disease (CVD) complications, especially in elderly patients.
• The mechanisms linking anemia to CVD complications like bleeding, stroke, and inflammation remain largely unknown.
• Red blood cells (RBCs) are now recognized for functions beyond oxygen transport, including roles in nitric oxide metabolism, redox regulation, and blood rheology.

Purpose of the Study:

• To review and discuss the potential impact of noncanonical RBC functions on the cardiovascular system.
• To explore the role of RBC dysfunction in anemia and its relationship to CVD.
• To bridge the gap in understanding the mechanistic links between RBC functional changes and CVD complications in anemia.

Main Methods:

• Literature review and synthesis of recent clinical and experimental evidence.
• Discussion of the noncanonical functions of RBCs.
• Analysis of RBC dysfunction in the context of anemia and CVD.

Main Results:

• RBCs possess significant noncanonical functions impacting systemic processes relevant to CVD.
• Dysfunction in these RBC roles may contribute to cardiovascular complications observed in anemia.
• Current understanding of these mechanistic links is limited.

Conclusions:

• Understanding the noncanonical functions of RBCs is crucial for elucidating anemia's role in CVD.
• Further basic and translational research is needed to define RBC dysfunction in anemia and its CVD relationship.
• Future studies should investigate RBCs' intrinsic and systemic dysfunction in both animal models and clinical settings.