Publications by authors named "M Topashka-Ancheva"

The highly valued oil of Mill. (Rosaceae), widely used in high perfumery, cosmetics, and other spheres of human life, obliges us to know and study the safety profile of the product obtained from the water-steam distillation of fresh rose petals. The genotoxicity of the essential oil (EsO) has not been thoroughly studied despite its wide range of applications.

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Poly(oxyethylene aminophosphonate)s synthesized on the basis of biodegradable poly(phosphorester)s and Schiff bases were tested for antitumor activity against a panel of six human epithelial cancer cell lines, for cytotoxicity to mouse fibroblast cells and for clastogenicity and antiproliferative effects. The polymers showed lower cytotoxicity, both and and lower clastogenicity than the corresponding low-molecular aminophosphonates. The biological activities of the tested polymers correlate with their low antitumor activity.

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Novel polyphosphoesters containing anthracene-derived aminophosphonate units, poly(oxyethylene aminophosphonate)s (4 and 5) and poly[oxyethylene(aminophosphonate-co-H-phosphonate)]s (6 and 7), were synthesized via an addition of poly(oxyethylene H-phosphonate)s to 9-anthrylidene-p-toluidine. The IR, NMR ((1)H, (13)C and (31)P) and fluorescence emission spectral data of the polymers are presented. The copolymers 6 and 7 were tested for in vitro antitumor activity on a panel of seven human epithelial cancer cell lines.

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Aim: To evaluate the effect of esculin, a plant coumarin glucoside, on free radicals and against epirubicin-induced toxicity on bone marrow cells.

Materials And Methods: Antioxidant activity was assessed by a luminol-dependent chemiluminescence method or NBT test in a xanthine-xanthine oxidase system, and two iron-dependent lipid peroxidation systems. In vivo experiments were carried out in epirubicin-treated mice, alone or in a combination with esculin.

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