Photobiological activity of exogenous and endogenous porphyrin derivatives in Escherichia coli and Enterococcus hirae cells

F. Gábor, K. Szocs, P. Maillard, G. Csík

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Photodynamic treatment, the combined application of a photosensitiser and visible light, represents a new and promising approach for the inactivation of microorganisms. The photosensitising potentials of exogenous zinc-phthalocyanine-tetrasulphonate (ZnPsTS), tetraphenylporphyrins (TPPs) and endogenous porphyrin derivatives were tested and compared on Gram-negative and Gram-positive bacteria, Escherichia coli B. and Enterococcus hirae, respectively. The synthesis of endogenous porphyrins was induced by 5-aminolevulinic acid (δ-ALA). The porphyrin- or δ-ALA-treated cells were irradiated with white light. The photosensitising efficiency of endogenous derivatives on both types of bacteria is ZnPcTS <TP(4-OGluOH)3P <TP(4-OGluOH)4P. However, neither exogenous derivatives exhibit appreciable photosensitising activity for disinfection application. ALA-induced photodynamic treatment showed good potential for the inactivation of Escherichia coli cells, but not towards Enterococcus hirae cells. The failure of photosensitisation of the Enterococcus hirae strain selected indicates that apart from the Gram-positive character, other structural elements of the membrane can influence the result of photodynamic treatments.

Original languageEnglish
Pages (from-to)145-151
Number of pages7
JournalRadiation and Environmental Biophysics
Volume40
Issue number2
DOIs
Publication statusPublished - 2001

Fingerprint

Enterococcus hirae
porphyrin
porphyrins
Porphyrins
Escherichia
Escherichia coli
chemical derivatives
Derivatives
deactivation
bacteria
Bacteria
inactivation
cells
Escherichia coli B
Photosensitivity Disorders
Light
Aminolevulinic Acid
aminolevulinic acid
bacterium
Photosensitizing Agents

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Environmental Science(all)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Biophysics
  • Radiation

Cite this

Photobiological activity of exogenous and endogenous porphyrin derivatives in Escherichia coli and Enterococcus hirae cells. / Gábor, F.; Szocs, K.; Maillard, P.; Csík, G.

In: Radiation and Environmental Biophysics, Vol. 40, No. 2, 2001, p. 145-151.

Research output: Contribution to journalArticle

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