Browsing by Author "Boguszewska-Czubara, Anna"

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    A representative of arylcyanomethylenequinone oximes effectively inhibits growth and formation of hyphae in Candida albicans and influences the activity of protein kinases in vitro
    (Elsevier, 2018) Masłyk, Maciej; Janeczko, Monika; Demchuk, Oleg M.; Boguszewska-Czubara, Anna; Golczyk, Hieronim; Sierosławska, Anna; Rymuszka, Anna; Martyna, Aleksandra; Kubiński, Konrad
    In this study, we applied various assays to reveal new activities of phenylcyanomethylenequinone oxime-4-(hydroxyimino) cyclohexa-2,5-dien-1-ylidene](phenyl)ethanenitrile (4-AN) for potential anti-microbial applications. These assays demonstrated (a) the antimicrobial effect on bacterial and fungal cultures, (b) the effect on the in vitro activity of the kinase CK2, (c) toxicity towards human erythrocytes, the Caco-2 cancer cell line, and embryonic development of Zebrafish. We demonstrated the activity of 4-AN against selected bacteria and Candida spp. The MIC ranging from 4 µg/ml to 125 µg/ml proved effective in inhibition of formation of hyphae and cell aggregation in Candida, which was demonstrated at the cytological level. Noteworthy, 4-AN was found to inhibit the CK2 kinase with moderate potency. Moreover, at low concentrations, it did not exert any evident toxic effects on human erythrocytes, Caco-2 cells, or Zebrafish embryos. 4-AN can be a potential candidate as a novel drug against Candida infections.
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    Novel functionalized β-nitrostyrenes: Promising candidates for new antibacterial drugs
    (Elsevier, 2019) Demchuk, Oleg M.; Boguszewska-Czubara, Anna; Kula, Karolina; Wnorowski, Artur; Biernasiuk, Anna; Popiołek, Łukasz; Miodowski, Dawid; Jasiński, Radomir
    The process of searching for new antibacterial agents is more and more challenging due to the increasing drug resistance, which has become a major concern in the field of infection management. Our study presents a synthesis and characterization by IR, UV, 1H NMR and 13C NMR spectra of a homogenous series of 1-EWG functionalized 2-aryl-1-nitroethenes which could prove good candidates for the replacement of traditional antibacterial drugs In vitro screening against a panel of the reference strains of bacteria and fungi and their cytotoxicity towards cultured human HepG2 and HaCaT cells was performed. Antimicrobial results indicated that four of the synthesized compounds exhibited a significant antimicrobial activity against all tested reference bacteria and fungi belonging to yeasts with a specific and strong activity towards B. subtilis ATCC 6633. Two of these compounds had no detectable cytotoxicity towards the cultured human cell lines, making them promising candidates for new antibacterial drugs.