Pulsed electric field treatment as a potential method for microbial inactivation in scaffold materials for tissue engineering: the inactivation of bacteria in collagen gel

S. Griffiths, S. Smith, S.J. MacGregor, J.G. Anderson, Christopher F. van der Walle, J.R. Beveridge, Helen Grant

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

To investigate the effectiveness of pulsed electric field (PEF) treatment as a new method for inactivation of micro-organisms in complex biomatrices and to assess this by quantifying the inactivation of Escherichia coli seeded in collagen gels. PEF was applied to E. coli seeded collagen gels in static (nonflowing) chambers. The influence of electric field strength, pulse number and seeded cell densities were investigated. The highest level of inactivation was obtained at the maximum field strength of 45 kV cm−1. For low levels of E. coli contamination (103 CFU ml−1), PEF treatment resulted in no viable E. coli being recovered from the gels. However, PEF treatment of gels containing higher cell densities (≥104 CFU ml−1) did not achieve complete inactivation of E. coli. PEF treatment successfully inactivated E. coli seeded in collagen gels by 3 log10 CFU ml−1. Complete inactivation was hindered at high cell densities by the tailing effect observed. PEF shows potential as a novel, nondestructive method for decontamination of collagen-based matrices. Further investigation is required to ensure its compatibility with other proteins and therapeutic drugs for tissue engineering and drug delivery applications.
LanguageEnglish
Pages963-969
Number of pages6
JournalJournal of Applied Microbiology
Volume105
Issue number4
DOIs
Publication statusPublished - Apr 2008

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Microbial Viability
Tissue Engineering
Collagen
Gels
Escherichia coli
Bacteria
Cell Count
Decontamination
Pharmaceutical Preparations

Keywords

  • biomatrices
  • collagen gel
  • inactivation of escherichia coli
  • pulse electric field
  • sterilization
  • pharmacology

Cite this

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title = "Pulsed electric field treatment as a potential method for microbial inactivation in scaffold materials for tissue engineering: the inactivation of bacteria in collagen gel",
abstract = "To investigate the effectiveness of pulsed electric field (PEF) treatment as a new method for inactivation of micro-organisms in complex biomatrices and to assess this by quantifying the inactivation of Escherichia coli seeded in collagen gels. PEF was applied to E. coli seeded collagen gels in static (nonflowing) chambers. The influence of electric field strength, pulse number and seeded cell densities were investigated. The highest level of inactivation was obtained at the maximum field strength of 45 kV cm−1. For low levels of E. coli contamination (103 CFU ml−1), PEF treatment resulted in no viable E. coli being recovered from the gels. However, PEF treatment of gels containing higher cell densities (≥104 CFU ml−1) did not achieve complete inactivation of E. coli. PEF treatment successfully inactivated E. coli seeded in collagen gels by 3 log10 CFU ml−1. Complete inactivation was hindered at high cell densities by the tailing effect observed. PEF shows potential as a novel, nondestructive method for decontamination of collagen-based matrices. Further investigation is required to ensure its compatibility with other proteins and therapeutic drugs for tissue engineering and drug delivery applications.",
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Pulsed electric field treatment as a potential method for microbial inactivation in scaffold materials for tissue engineering: the inactivation of bacteria in collagen gel. / Griffiths, S.; Smith, S.; MacGregor, S.J.; Anderson, J.G.; van der Walle, Christopher F.; Beveridge, J.R.; Grant, Helen.

In: Journal of Applied Microbiology, Vol. 105, No. 4, 04.2008, p. 963-969.

Research output: Contribution to journalArticle

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AU - van der Walle, Christopher F.

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AU - Grant, Helen

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