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Dynamics of oscillating erythrocyte doublets after electrofusion
1Institut für Physiologie der RWTH Aachen, 52057 Aachen, Germany. martin@physiology.rwth-aachen.de
Biophysical Journal
|November 5, 1999
Summary
Electrofused erythrocytes exhibit oscillatory movements, characterized by swelling and rapid pumping events. Temperature influences these dynamics, with higher temperatures affecting membrane elasticity and potentially preventing oscillations.
Area of Science:
- Biophysics
- Cell Biology
- Membrane Dynamics
Background:
- Electroporation is a method to permeabilize cell membranes.
- Understanding erythrocyte behavior under electrical stress is crucial for cell manipulation.
Purpose of the Study:
- To investigate the oscillatory movement of electrofused erythrocytes.
- To analyze the physical properties governing erythrocyte membrane dynamics during electrical pulses.
Main Methods:
- Erythrocytes were electrofused using multiple rectangular voltage pulses.
- Oscillatory movements were characterized by swell phases and pump events.
- Effects of temperature on these dynamics were examined.
Main Results:
- Electrofused erythrocytes displayed oscillatory behavior with distinct swell and pump phases.
- Pump event time constants ranged from 2-8 ms, influenced by temperature.
- Increased temperature reduced swell phase durations and pump event time constants, indicating altered membrane and liquid properties.
Conclusions:
- Oscillatory movements in electrofused erythrocytes are governed by physical properties of the membrane and internal liquids.
- Membrane elasticity decreases during oscillation, weakening the rupture site.
- Heat treatment above 45°C significantly impacts or prevents these oscillatory movements.