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08:17
Electrophoretic Separation of Proteins
Published on: June 12, 2008
EFFECT OF PROTEINS ON ELECTROPHORETIC MOBILITY AND SEDIMENTATION VELOCITY OF RED CELLS
1Department of Physiology, Washington University School of Medicine, Saint Louis.
The Journal of General Physiology
|October 30, 2009
Summary
Normal red blood cells do not adsorb proteins from solutions, indicating their surface is hydrated. Protein aggregation is linked to cell dehydration, with variations observed across different red blood cell types.
Area of Science:
- Biophysics
- Hematology
- Colloid Science
Background:
- Red blood cells (RBCs) possess an isoelectric point lower than plasma proteins.
- RBCs are susceptible to damage, leading to protein adsorption from solutions.
- Understanding protein-RBC interactions is crucial for hematological studies.
Purpose of the Study:
- To investigate protein adsorption onto normal red blood cells.
- To explore the relationship between protein concentration, cell hydration, and aggregation.
- To determine the influence of cell type and medium on aggregation and sedimentation.
Main Methods:
- Electrophoretic mobility measurements of red blood cells in various protein solutions (casein, albumin, gelatin, fibrinogen).
- Observation of red cell aggregation and sedimentation rates.
- Correlation of bulk viscosity changes with observed cell mobility.
Main Results:
- Normal red blood cells did not adsorb proteins even from concentrated solutions.
- Increased bulk viscosity due to protein addition did not significantly alter red cell mobility, suggesting surface hydration.
- Certain proteins induced red cell aggregation, attributed to their dehydrating effects.
Conclusions:
- Red blood cell surface hydration plays a key role in resisting protein adsorption.
- Protein-induced aggregation is likely mediated by dehydration of the red cell surface.
- Variations in red blood cell type influence their susceptibility to dehydration and aggregation.
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