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Interlinked Macroporous 3D Scaffolds from Microgel Rods
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Macroporous gel particles as robust macroporous matrices for cell immobilization.

Fatima M Plieva1, Alina Oknianska, Eva Degerman

  • 1Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden. fatima.plieva@biotek.lu.se

Biotechnology Journal
|November 21, 2007
PubMed
Summary

New macroporous gels (MGs) with a protective housing enable robust cell immobilization for bioreactors. These stable MGs maintain high microbial cell activity after drying and storage, enhancing bioprocesses.

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Area of Science:

  • Biotechnology
  • Biomaterials Engineering
  • Microbial Engineering

Background:

  • Cell immobilization is crucial for bioprocesses, but maintaining cell activity post-immobilization, especially after drying and storage, remains a challenge.
  • Existing immobilization matrices often lack the structural integrity to withstand harsh conditions in well-stirred bioreactors.

Purpose of the Study:

  • To develop a novel, robust matrix for microbial cell immobilization.
  • To enhance the stability and retained activity of immobilized cells, particularly after drying and storage.
  • To enable the use of immobilized cells in well-stirred bioreactor systems.

Main Methods:

  • Preparation of macroporous gels (MGs) at subzero temperatures.
  • Incorporation of microbial cells (yeast and Escherichia coli) within the MGs.
  • Encapsulation of MGs within a protective plastic housing.
  • Assessment of cell activity and structural stability after drying and storage.

Main Results:

  • Successfully designed and prepared robust macroporous gel particles with immobilized microbial cells.
  • The protective housing allowed for the use of immobilized cells in well-stirred bioreactors.
  • High retained activity was observed for immobilized yeast (77-92%) and Escherichia coli (50-91%) after drying and storage.
  • The structural stability and heterogeneous porous structure of the MGs contributed to the high retained cell activity.

Conclusions:

  • The novel macroporous gel design with protective housing offers a robust solution for cell immobilization.
  • This method significantly improves the stability and viability of immobilized microbial cells, especially under storage conditions.
  • The developed system is suitable for application in well-stirred bioreactors, advancing bioprocess technology.