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Selected Publication:

Type of publication: Journal Article
Type of document: Full Paper

Year: 2000

Authors: Egerbacher, M; Seiberl, G; Wolfesberger, B; Walter, I

Title: Ciprofloxacin causes cytoskeletal changes and detachment of human and rat chondrocytes in vitro.

Source: Arch Toxicol. 2000; 73(10-11):557-563

Authors Vetmeduni Vienna:

Egerbacher Monika
Walter Ingrid
Wolfesberger Birgitt

Vetmed Research Units
Institute of Morphology

Quinolones cause damage of articular cartilage in different species by forming chelate complexes with divalent cations and inducing magnesium deficiency. Cations are important for regular function of integrins, a group of transmembrane proteins which connect extracellular matrix proteins with the intracellular cytoskeleton. We have shown that cultivation of rat chondrocytes in ciprofloxacin (CFX)-supplemented and Mg(2+)-free medium led to pronounced changes in the cytoskeleton and decreased adhesion of cells to the culture dish. In order to test whether or not these effects are species-specific, we extended our studies on human chondrocytes. Human chondrocytes cultivated in CFX-supplemented medium (10, 40, 80 and 160 microg/ml) or Mg(2+)-free medium showed decreased ability to adhere to growth support, cell shape changes, and alterations in actin and vimentin cytoskeleton in a concentration dependent manner. Attachment of human chondrocytes to collagen type II coated cover slips was reduced to 90% in CFX group and 75% in Mg(2+)-free group on day 1. This effect even increased after 4 days of culture in the respective medium (32% in CFX and 58% in Mg(2+)-free group). We concluded that Mg(2+) deficiency is exerted via integrins, resulting in decreased ability to attach to extracellular matrix proteins and cytoskeletal changes. These effects are not species-specific. The attachment assay proves to be an easy to use experimental set-up to test ciprofloxacin and other quinolones for their chondrotoxic effects.

Keywords Pubmed: Animals
Anti-Infective Agents/pharmacology*
Cartilage, Articular/cytology
Cartilage, Articular/drug effects*
Cartilage, Articular/physiology
Cell Adhesion/drug effects*
Cell Adhesion/physiology
Cells, Cultured
Chondrocytes/drug effects*
Culture Media
Cytoskeleton/drug effects*
Microscopy, Confocal
Species Specificity


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