Repozytorium publikacji - Politechnika Gdańska

Abstract: Background: It is assumed that the unfavorable selective toxicity of an antifungal drug Amphotericin B (AmB) can be improved upon chemical modification of the antibiotic molecule. Objective: The aim of this study was verification of the hypothesis that introduction of bulky substituents at the amino sugar moiety of the antibiotic may result in diminishment of mammalian vitro toxicity of thus prepared AmB derivatives. Methods: Twenty-eight derivatives of AmB were obtained upon chemical modification of amino group of mycosamine residue. This set comprised 10 N-succinimidyl-, 4 N-benzyl-, 5 Nthioureidyl- and 9 N-aminoacyl derivatives. Parameters characterizing biological in vitro activity of novel compounds were determined. Results: All the novel compounds demonstrated lower than AmB antifungal in vitro activity but most of them exhibited negligible cytotoxicity against human erythrocytes and three mammalian cell lines. In consequence, the selective toxicity of majority of novel antifungals, reflected by the selective toxicity index (STI = EH50/IC50) was improved in comparison with that of AmB, especially in the case of 5 compounds. The novel AmB derivatives with the highest STI, induced substantial potassium efflux from Candida albicans cells at concentrations slightly lower than IC50s but did not trigger potassium release from human erythrocytes at concentrations lower than 100 μg/mL. Conclusion: Some of the novel AmB derivatives can be considered promising antifungal drug candidates.

Autorzy

• prof. dr hab. inż. Edward Borowski link otwiera się w nowej karcie ,
• Natalia Salewska link otwiera się w nowej karcie ,
• mgr inż. Joanna Boros-Majewska link otwiera się w nowej karcie ,
• dr inż. Marcin Serocki link otwiera się w nowej karcie ,
• Izabela Chabowska link otwiera się w nowej karcie ,
• prof. dr hab. inż. Maria Milewska link otwiera się w nowej karcie ,
• Dominik Ziętkowski,
• prof. dr hab. inż. Sławomir Milewski link otwiera się w nowej karcie