Interaction between ciprofloxacin and melanin: the effect on proliferation and melanization in melanocytes
| Autor: | Michał Otręba, Artur Beberok, Dorota Wrześniok, Janina Trzcionka, Ewa Buszman |
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| Rok vydání: | 2011 |
| Předmět: |
Cell Survival
Human skin Melanocyte Biology Pharmacology Melanin Anti-Infective Agents In vivo Ciprofloxacin medicine Humans Binding site Cells Cultured Cell Proliferation Melanins Binding Sites integumentary system Monophenol Monooxygenase In vitro Dihydroxyphenylalanine Kinetics medicine.anatomical_structure Toxicity Melanocytes sense organs medicine.drug |
| Zdroj: | European journal of pharmacology. 669(1-3) |
| ISSN: | 1879-0712 |
| Popis: | There have been described serious adverse events caused by ciprofloxacin in pigmented tissues. It is known that some fluoroquinolones bind well to melanin rich tissues, but the relation between their affinity to melanin and the skin or eye toxicity is not well documented. The aim of this study was to examine whether ciprofloxacin binds to melanin, and how this interaction affects the proliferation and melanization in melanocytes. We have demonstrated that complexes which ciprofloxacin forms with melanin possess at least two classes of independent binding sites. Their association constants are K(1)~10(5) M(-1) and K(2)~10(2) M(-1), respectively. Ciprofloxacin has induced evident concentration-dependent loss in melanocytes viability. The value of ED(50) was found to be ~0.5 mM. It has also been shown that ciprofloxacin reduces melanin content, and decreases tyrosinase activity in human skin melanocytes. The ability of ciprofloxacin to interact with melanin and its inhibitory effect on melanization in melanocytes in vitro may explain a potential role of melanin in the mechanisms of ciprofloxacin toxic effects in vivo. |
| Databáze: | OpenAIRE |
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