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  • Küçük Resim
    Öğe
    Association Between Human Hair Loss and the Expression Levels of Nucleolin, Nucleophosmin, and UBTF Genes
    (Mary Ann Liebert, Inc, 2016) Taşdemir, Şener; Eröz, Recep; Doğan, Hasan; Erdem, Haktan Bağış; Şahin, İbrahim; Kara, Murat; Türkez, Hasan
    Aims: Nucleolar organizer regions, also known as argyrophilic nucleolar organizer regions, are associated with ribosomal genes. The main function of the nucleolus is the rapid production of ribosomal subunits, a process that must be highly regulated to provide the appropriate levels for cellular proliferation and cell growth. There are no studies in the literature addressing the expression and function of nucleolar component proteins, including nucleophosmin, nucleolin and the upstream binding transcription factor (UBTF), in human follicular hair cells. Methods: Nineteen healthy males who had normal and sufficient hair follicles on the back of the head, but exhibited hair loss on the frontal/vertex portions of the head and 14 healthy males without hair loss were included in the current study. Gene expression levels were measured by relative quantitative real time polymerase chain reaction. Results: In the individuals suffering from alopecia, the total expression levels of nucleolin, nucleophosmin, and UBTF were lower in normal sites than in hair loss sites. Strong expression level correlations were detected between: nucleophosmin and nucleolin; nucleophosmin and UBTF, and nucleolin and UBTF for both groups. Conclusions: There was an association between human hair loss and the expression levels of nucleolin, nucleophosmin, and UBTF genes.
  • Küçük Resim
    Öğe
    In vitro cytotoxic and genotoxic effects of newly synthesised boron ionic liquids
    (Taylor & Francis Ltd, 2019) Oğuzkan, Sibel Bayıl; Türkez, Hasan; Karagül, Bora; Çakır, Ümit; Uğraş, Halil İbrahim
    In this study, new molecules containing boron were added to the family of ionic organic compounds, in particular, ionic liquids with a cationic center. This study aimed to determine the cytotoxic and genetic effects of a total of four newly synthesised borenium and borinium compounds on human peripheral lymphocytes in vitro. Human peripheral lymphocytes were obtained from heparinised blood samples collected from healthy females aged between 29 and 32 years, with no history of exposure to toxic agents. The cytotoxicity was assayed via the MTT (3-(4.5-dimethylthiazole- 2-yl)-2.5-diphenyltetrazolium-bromide) and LDH (lactate dehydrogenase) tests; the genotoxicity and cytotoxicity, via the micronucleus (MN) and sister chromatid exchange (SCE) tests. The results showed that the borenium compounds did not exhibit cytotoxic activity in the MTT and LDH tests even in high concentrations, the borinium compound did not exhibit cytotoxic effects in lower concentrations in vitro. The borenium compounds did not show genotoxic effects in SCE and MN tests. However, at a high concentration, borinium increased the micronucleus rate in comparison to the negative control group. The obtained results suggest that these newly synthesised cationic boron compounds can be used reliably in health, cosmetics or other industries, taking into consideration their types and concentrations.