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GÜRBÜZ, BURÇAK

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BURÇAK

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2010 - 201932020 - 20222
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    PublicationOpen Access
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    PublicationOpen Access
    Synthesis of novel pyrazoline derivatives and evaluation of their antimicrobial activity
    (2022-01-01) TOK, FATİH; GÜRBÜZ, BURÇAK; KAYMAKÇIOĞLU, BEDİA; TOK F., Doğan M. O. , GÜRBÜZ B., Koçyiğit-Kaymakçioğlu B.
    © 2022 Marmara University Press.In this study, new nine pyrazoline derivatives were synthesized from chalcone derivatives. The antimicrobial activity of nine pyrazoline derivatives to four standard bacterial strains (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterococcus faecalis) and four standard yeast strains (Candida albicans, Candida glabrata, Candida parapsilosis, Candida tropicalis) was investigated by the microdilution method for in accordance with the Clinical and Laboratory Standards Institute (CLSI) standard, and the Minimal Inhibitory Concentration (MIC) values of these derivatives were determined. Among these derivatives; compounds 7 and 8 against bacterial strains and compounds 2 and 3 against yeast strains exhibited good antimicrobial activity.
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    PublicationOpen Access
    Potential Adjuvant Effects of Nigella sativa Seeds to Improve Specific Immunotherapy in Allergic Rhinitis Patients
    (KARGER, 2010) GÜRBÜZ, BURÇAK; Isik, Huelya; Cevikbas, Adile; Gurer, Umran Soyogul; Kiran, Bayram; Uresin, Yagiz; Rayaman, Pervin; Rayaman, Erkan; Gurbuz, Burcak; Buyukozturk, Suna
    Objective: To investigate the effects of Nigella sativa seed supplementation on symptom levels, polymorphonuclear leukocyte (PMN) functions, lymphocyte subsets and hematological parameters of allergic rhinitis. Subjects and Methods: Twenty-four patients randomly selected from an experimental group of 31 (mean age 34 years) sensitive to house dust mites with allergic rhinitis and a control group of 8 healthy volunteers (mean age 23 years) were treated with allergen-specific immunotherapy in conventional doses for 30 days. After a month of immunotherapy, 12 of the 24 patients and the 8 healthy volunteers were given N. sativa seed supplementation (2 g/day orally) for 30 days. The remaining 12 patients continued only on immunotherapy during the same period. The other 7 patients were given 0.1 ml saline solution subcutaneously once a week as a placebo. The symptom scores, PMN functions, lymphocyte subsets and other hematological parameters were evaluated before and after all treatment periods. Results: There was a statistically significant increase in the phagocytic and intracellular killing tivities of PMNs of patients receiving specific immunotherapy, especially after the addition of N. sativa seed. The CD8 counts of patients receiving specific immunotherapy plus N. sativa seed supplementation significantly increased compared to patients receiving only specific immunotherapy. PMN functions of healthy volunteers significantly increased after N. sativa seed supplementation compared to baseline. Conclusion: N. sativa seed supplementation during specific immunotherapy of allergic rhinitis may be considered a potential adjuvant therapy. Copyright (C) 2010 S. Karger AG, Basel
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    PublicationOpen Access
    The cytotoxicity and the antimicrobial activities of arum italicum miller
    (2022-01-01) GÜRBÜZ, BURÇAK; Ulusoylu M., GÜRBÜZ B.
    © 2022 Marmara University Press.In this study, the cytotoxicity potential and antibacterial and antifungal activities of two different extracts of fresh leaves of Arum italicum Miller were investigated. The saponin extract and the alkaloid extract were investigated by Brine Shrimp (Artemia salina L.) lethality bioassay method for evaluation of cytotoxic effect. Umbelliferone was used as standard, and both of the extracts showed cytotoxic effect by the Brine Shrimp (Artemia salina L.) lethality bioassay method. According to the LC50 results, saponin extract was found to be the most active extract, and classifiable as moderate to highly toxic (LC50 237.1437 mg/mL-1). Although, the alkaloid extract was showed cytotoxic activity lower than Umbelliferone, LC50 750.1920 mg/mL-1 value was classifiable as mildly cytotoxic. Antibacterial and antifungal activities were tested by the agar well diffusion and tube dilution methods. 6 bacteria and 6 yeasts were used in the methods Meropenem and Fluconazole were the standards of the methods. The saponin extract was found to be effective against Staphylococcus epidermidis and Sthaphylococcus aureus compared with Meropenem. Both of the extracts were not found to be effective against fluconazole as antifungal activity point of view. According to the all studied activity results the saponin contents of the fresh leaves of the plant emphasizing the antimicrobial activity. And, both of the extracts have cytotoxic activity potential.
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    PublicationOpen Access