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Related Experiment Videos

The parameter conversion from the Kedem-Katchalsky model into the two-parameter model.

Songpol Chuenkhum1, Zhanfeng Cui

  • 1Department of Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, UK.

Cryo Letters
|August 8, 2006
PubMed
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The two-parameter (2-p) model accurately estimates cell volume changes during cryoprotective agent (CPA) addition and removal. This model is more suitable than the Kedem-Katchalsky (K-K) model for cryopreservation processes.

Area of Science:

  • Cell biology
  • Biophysics
  • Cryobiology

Background:

  • Cryopreservation preserves cells and tissues but can cause damage due to osmotic stress from cryoprotective agents (CPAs).
  • Cell volume changes during CPA exposure depend on CPA type, addition/removal methods, and cell permeability.
  • Existing models like the Kedem-Katchalsky (K-K) model may have limitations due to assumptions about transport pathways.

Purpose of the Study:

  • To evaluate the suitability of the two-parameter (2-p) model versus the K-K model for describing cell volume changes during cryopreservation.
  • To derive 2-p model parameters from existing K-K model data in the literature.

Main Methods:

  • Literature review of K-K model parameters for cell transport during cryopreservation.
  • Simulation using K-K model parameters to calculate corresponding 2-p model parameters.

Related Experiment Videos

  • Comparison of cell volume change predictions between the 2-p and K-K models.

    • Main Results:

    • The 2-p model provides a suitable and potentially more accurate representation of cell transport during CPA exposure.
    • Calculated 2-p model parameters closely estimated cell volume changes predicted by the K-K model.
    • The 2-p model avoids potential conceptual errors associated with the reflection coefficient in the K-K model.

    Conclusions:

    • The 2-p model is a more appropriate transport model for cryopreservation than the K-K model.
    • The 2-p model effectively captures cell volume dynamics during CPA manipulation, crucial for minimizing cryoinjury.
    • This study validates the 2-p model's utility by demonstrating its ability to replicate K-K model outcomes with simpler assumptions.