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Ultrastructural changes in hypothermically preserved hepatocytes.

B J Griffiths1, P J Evans

  • 1Cardiff School of Biosciences, Cardiff University, Cardiff, CF1 3TL, United Kingdom.

Cryobiology
|May 2, 2000
PubMed
Summary
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Hepatocytes preserved in gelatin at 10°C showed stable morphology for 9 days. Organelle migration and mitochondrial aggregation occurred later, indicating these changes precede cold-induced cell death.

Area of Science:

  • Cell Biology
  • Cryobiology
  • Biomaterials

Background:

  • Hypothermic preservation is crucial for biological samples.
  • Understanding cold-induced cell death mechanisms is vital for improving preservation techniques.
  • Gelatin hydrogels offer a promising matrix for cell encapsulation and preservation.

Purpose of the Study:

  • To investigate cold-induced changes in hepatocytes during hypothermic preservation.
  • To evaluate the stability and suitability of gelatin gels for long-term hepatocyte preservation.
  • To identify the key cellular events leading to cell death under cold stress.

Main Methods:

  • Hepatocytes were preserved on gelatin gels at 10°C for up to 9 days.
  • Cell morphology and organelle distribution were monitored over time.

Related Experiment Videos

  • Mitochondrial morphology and microvilli integrity were assessed.

    • Main Results:

    • Hepatocyte morphology remained stable for the initial 9 days of preservation.
    • A progressive centripetal movement of organelles was observed after 9 days.
    • Mitochondria maintained normal morphology during organelle migration but aggregated post-migration.
    • Microvilli disappeared as organelle aggregation occurred.

    Conclusions:

    • Gelatin gels provide a stable environment for hepatocyte preservation up to 9 days at 10°C.
    • Cold-induced cell death involves delayed organelle migration and mitochondrial aggregation.
    • Mitochondria may not be the primary trigger but are affected by the cold-induced transition.