NDLI: Discovering the mechanisms of strain-dependent response of Staphylococcus aureus to photoinactivation: oxidative stress toleration, endogenous porphyrin level and strain's virulence.

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Discovering the mechanisms of strain-dependent response of Staphylococcus aureus to photoinactivation: oxidative stress toleration, endogenous porphyrin level and strain's virulence.

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Discovering the mechanisms of strain-dependent response of Staphylococcus aureus to photoinactivation: oxidative stress toleration, endogenous porphyrin level and strain's virulence.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kossakowska, Monika Nakonieczna, Joanna Kawiak, Anna Kurlenda, Julianna Bielawski, Krzysztof P. Grinholc, Mariusz
Description	Country affiliation: Poland Author Affiliation: Kossakowska M ( Laboratory of Molecular Diagnostics, Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Kladki 24, 80-822 Gdansk, Poland.)
Abstract	BACKGROUND: Staphylococcus aureus is generally known to be susceptible to photoinactivation. However, the phenomenon of its strain-dependent response to photodynamic treatment has been reported. Moreover, the factors determining the emerging variation among strains according to photoinactivation remain unclear. METHODS: This work aimed to investigate any relevant correlation between bacterial toleration of oxidative stress, porphyrin level, photosensitizer uptake and strain's virulence of studied methicillin-susceptible and methicillin-resistant S. aureus strains and their response to photodynamic inactivation (using protoporphyrin diarginate, toluidine blue O and 5-aminolevulinic acid). RESULTS: Obtained data let to demonstrate that studied factors have limited impact on strain response to PDI. However, we have shown that multicomponent sensitizing agent i.e. consisted of PPArg2, ALA and TBO would eliminate the S. aureus elevated resistance to photoinactivation and that both highly virulent and low virulent S. aureus strains could be easily eradicated with the use of PDI. Moreover, we have shown that photodynamic inactivation could decrease the virulence of S. aureus extracellular fraction. CONCLUSION: The mechanism underlying strain-dependent response to photoinactivation is complex and multifactorial nevertheless with the use of several sensitizing agents the elevated resistance to photodynamic treatment can be omitted.
File Format	HTM / HTML
ISSN	15721000
Issue Number	4
Volume Number	10
e-ISSN	18731597
Journal	Photodiagnosis and Photodynamic Therapy
Language	English
Publisher	Elsevier
Publisher Date	2013-12-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Diagnostic Imaging Discipline Therapeutics Keratinocytes Microbiology Oxidative Stress Physiology Photosensitizing Agents Pharmacology Porphyrins Metabolism Radiation Tolerance Staphylococcus Aureus Classification Cell Line Cell Proliferation Drug Effects Radiation Effects Cell Survival Humans Light Species Specificity Virulence Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Biophysics Dermatology Pharmacology (medical) Oncology

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