The adaptability of red blood cells

Area of Science:

• Hematology
• Cell Biology
• Biophysics

Background:

• Red blood cells (RBCs) are crucial for oxygen transport but also participate in inflammation and coagulation.
• RBCs possess significant deformability and elasticity to navigate the vascular system under shear forces.
• Inflammatory conditions and oxidative stress can alter the discoid shape of RBCs.

Purpose of the Study:

• To investigate the ultrastructural changes in RBCs using scanning electron microscopy.
• To determine the speed of shape changes in healthy RBCs upon exposure to iron and glucose.
• To compare these changes with RBCs from diabetic and hemochromatosis patients, and to assess the impact of thrombin on RBCs in various conditions.

Main Methods:

• Scanning electron microscopy (SEM) was employed to visualize RBC ultrastructure.
• Experiments involved exposing RBCs from healthy individuals to iron and glucose.
• RBCs from patients with diabetes and hereditary hemochromatosis (various genotypes) were analyzed, with and without thrombin addition.

Main Results:

• RBCs from healthy individuals exhibited rapid shape changes after exposure to iron and glucose.
• RBCs from diabetic and hemochromatosis patients showed altered morphology.
• Thrombin addition led to RBCs being entrapped within fibrin meshes, causing significant shape deformation due to fibrin pressure.

Conclusions:

• RBCs demonstrate remarkable speed in adapting their shape to environmental changes.
• Fibrin fibers exert pressure that can tightly trap RBCs within developing blood clots.
• Understanding RBC deformability and interaction with fibrin is critical in coagulation and inflammatory processes.