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Related Concept Videos

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...

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Cryopreservation of Cortical Tissue Blocks for the Generation of Highly Enriched Neuronal Cultures
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Cryopreservation of cells for tissue engineering.

D B Walcerz1, A M Karow

  • 1Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609.

Tissue Engineering
|November 3, 2009
PubMed
Summary

Cryogenic storage at -125°C or below preserves engineered tissues without metabolic demands, ensuring long-term cell viability. This review details the biophysical and chemical principles for designing effective cryopreservation protocols for tissue engineering applications.

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Area of Science:

  • Biophysics
  • Chemical Engineering
  • Materials Science

Background:

  • Engineered tissues require preservation methods to maintain cell viability before clinical implantation.
  • Ambient temperature storage is costly, risks infection, and biological alteration.
  • Low-temperature cryogenic storage (-125°C or below) eliminates metabolic demands and ensures long-term viability.

Purpose of the Study:

  • To identify the scientific principles of cryopreservation relevant to tissue engineering.
  • To provide mathematical definitions for designing cryopreservation protocols for engineered tissues.
  • To guide tissue engineers in preserving component cells of newly engineered tissues.

Main Methods:

  • Review of biophysical, engineering, and chemical principles of cryopreservation.
  • Analysis of cell characteristics relevant to cryopreservation (size, composition).
  • Mathematical formulation for protocol design.

Main Results:

  • Cryogenic storage at -125°C or below prevents metabolic activity and preserves cell viability for over 10 years.
  • Established clinical acceptance of cryopreservation for various tissues (blood cells, cornea, etc.).
  • Principles derived apply to typical cells with defined nuclear/vacuole size and composition.

Conclusions:

  • Cryopreservation offers a viable solution for long-term storage of engineered tissues.
  • Understanding the underlying scientific principles is crucial for developing effective cryopreservation protocols.
  • This review provides a foundation for tissue engineers to optimize cell preservation strategies.