Cited by 14Carcinogens and Genotoxicity AssessmentPhotodynamic Therapy Research StudiesBioactive Compounds and Antitumor Agents

Rufloxacin-induced photosensitization in yeast

Catalfo, Alfio, Calandra, Maria Laura, Renis, Marcella, Serrentino, Maria Elisabetta, De Guidi, Guido·2007·Photochemical & Photobiological Sciences

Abstract

The fluoroquinolone Rufloxacin (RFX) is active as specific inhibitor of bacterial gyrase. The adverse effects of the photosensitization induced by fluoroquinolones are well known. A predominant type II photosensitizing activity of Rufloxacin has already been demonstrated on simpler models (free nucleosides, calf thymus DNA), whereas a cooperative mechanism was corroborated on more complex ones (plasmid and fibroblast). The purpose of this study is to examine the drug photocytoxicity in another complex cellular model, a wild-type eukaryotic fast-growing microorganism whose cultivation is cheap and easily managed, Saccharomyces cerevisiae. This work represents the first report of the potential photogenotoxicity of Rufloxacin. Particular emphasis was given to DNA modifications caused in yeast by the formation of Rufloxacin photomediated toxic species, such as hydrogen peroxide and formaldehyde. Drug phototoxicity on yeast was evaluated by measuring DNA fragmentation (single/double strand breaks) using single cell gel electrophoresis assay and 8-OH-dGuo, a DNA photooxidation biomarker, by HPLC-ECD. Cellular sensitivity was also assessed by cell viability test. The extra- and intracellular RFX concentration (as well as its main photoproduct) was verified by HPLC-MS, whereas the cytotoxic species were evaluated by colorimetric assays. The results confirm the phototoxicity of Rufloxacin on yeast cell and are in agreement with those previously obtained with human fibroblast and with simpler models used recently, and provide a clear link between DNA photosensitization and overall phototoxicity.

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Crossref · 10.1039/b608238f

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Authors
Catalfo, A., Calandra, M. L., Renis, M., Serrentino, M. E., & De Guidi, G.
Affiliations
University of Catania (IT)
Venue
Photochemical & Photobiological Sciences
Published
2007-02
Volume
6
Issue
2
Pages
181-189
ISSN
  • 1474-905X (ISSN-L)
  • 1474-9092
OpenAlex
W1976080857
Cited by
14
References
64
Citations by year
2021: 1 · 2018: 1 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
0.59
Type
journal article
Language
en
Open access
closed
Locations
  • Photochemical & Photobiological Sciences (publishedVersion, public-domain)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
rufloxacin, fluoroquinolones, photosensitization, phototoxicity, photogenotoxicity, Saccharomyces cerevisiae, DNA damage, hydrogen peroxide, formaldehyde, DNA fragmentation, DNA gyrase inhibitors, photoproducts
MeSH terms
Cell Survival, Chromatography, High Pressure Liquid, Dose-Response Relationship, Drug, Dose-Response Relationship, Radiation, Formaldehyde, Hydrogen Peroxide, Saccharomyces cerevisiae, Sensitivity and Specificity, Mass Spectrometry, Ultraviolet Rays, Quinolones, Molecular Structure, Photosensitizing Agents, Fluoroquinolones, DNA Fragmentation

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