Red blood cell dysfunction: a new player in cardiovascular disease

Area of Science:

• Cardiovascular Physiology
• Red Blood Cell Biology
• Pathophysiology

Background:

• Red blood cells (RBCs) traditionally viewed as passive oxygen carriers.
• Emerging evidence highlights RBCs' active roles in redox balance and vascular tone regulation via nitric oxide (NO) and adenosine triphosphate.
• Altered RBC function is implicated in various pathological conditions, particularly cardiovascular diseases.

Purpose of the Study:

• To review the multifaceted roles of RBCs in cardiovascular regulation.
• To explore the implications of altered RBC function in pathological states, including diabetes mellitus.
• To discuss novel therapeutic strategies targeting RBCs for cardiovascular disease intervention.

Main Methods:

• Literature review of current research on RBC function and cardiovascular disease.
• Analysis of studies investigating RBC alterations in pathological conditions.
• Synthesis of findings on RBC-mediated endothelial dysfunction and cardiac injury.

Main Results:

• RBCs actively regulate vascular tone through NO bioactivity and ATP release, especially under hypoxia.
• Pathological conditions feature altered RBCs with increased adhesion, reactive oxygen species, and impaired NO export due to elevated arginase activity.
• Altered RBCs contribute to endothelial dysfunction and cardiac injury in conditions like diabetes mellitus.

Conclusions:

• RBCs play a critical, active role in cardiovascular regulation beyond gas transport.
• Dysfunctional RBCs are significant contributors to cardiovascular disease pathophysiology, particularly in diabetes.
• Targeting RBC signaling presents a promising avenue for novel cardiovascular disease therapeutics.