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  • Küçük Resim
    Öğe
    The cytogenetic effects of the aqueous extracts of migratory locust ( Locusta migratoria L.) in vitro
    (Sage Publications Inc, 2014) Turkez, Hasan; Incekara, Umit; Guner, Adem; Aydin, Elanur; Dirican, Ebubekir; Togar, Basak
    One of the useful and most commonly cultivated commercially species, migratory locust (Locusta migratoria; Orthoptera), was investigated in light of genotoxic damage potentials. For this aim, we evaluated the genotoxic potentials of water soluble extracts of L. migratoria on cultured human blood cells. The micronucleus, sister chromatid exchange and structural chromosome aberration assays were applied to assess DNA and chromosomal damage produced by aqueous extracts in vitro. The extracts were added to the cultures at different concentrations ranging from 0 to 1000mg/L. Our results indicated that these extracts did not exhibit genotoxicity at tested concentrations. We conclude that this in vitro approach for biomonitoring genotoxicity assessment is useful for comparing the potential health risks of edible insects.
  • Küçük Resim
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    In vitro studies on protective effect of Glycyrrhiza glabra root extracts against cadmium-induced genetic and oxidative damage in human lymphocytes
    (Springer, 2014) Dirican, Ebubekir; Turkez, Hasan
    Cadmium is a modern environmental contaminant that is toxic and carcinogenic. Glycyrrhiza glabra is a traditional medicinal herb which grows in the various parts of the World. Recent studies demonstrated that G. glabra has antifungal, antimicrobial, antioxidant, and powerful antiinflammatory features. The purpose of this study was to investigate the genetic safety of extracts from G. glabra and its effects on cadmium (as CdCl2) induced genotoxicity. Therefore we evaluated the capability of G. glabra extract to inhibit the rate of micronucleus (MN), sister chromatid exchange (SCE) formations induced by CdCl2. Moreover, to assess the effects of G. glabra on cell viability and oxidative status, we performed 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) and total antioxidant capacity (TAC) assays. Our results showed that there were significant increases (P\0.05) in both SCE and MN frequencies of cultures treated with CdCl2 (5 ppm) as compared to controls. However, co-application of G. glabra extract (5, 10 and 20 ppm) and CdCl2 resulted in decreases of MN and SCE rates as compared to the group treated with CdCl2 alone. Again, the results of MTT and TAC assays clearly indicated dose dependent ameliorative effects of G. glabra extracts against CdCl2 toxicity. In conclusion, this study demonstrated for the first time that G. glabra extracts provided increased resistance of DNA against CdCl2 induced genetic and oxidative damage in human lymphocytes. So, the risk on target tissues of CdCl2 could be reduced and ensured early recovery from its toxicity.
  • [ N/A ]
    Öğe
    THYMBRA SPICATA L. MODULATES CHROMIUM (III) CHLORIDE-INDUCED GENETIC AND OXIDATIVE DAMAGE IN VITRO
    (Parlar Scientific Publications (P S P), 2012) Dirican, Ebubekir; Turkez, Hasan
    Chromium is a toxic heavy metal used in various industries and leads to environmental pollution due to improper handling. Cr exhibits oxidative stress mediated genotoxic damage although the mechanism of cellular damage caused by Cr has not been fully elucidated. On the other hand, Thymbra spicata L., a member of the Lamiaceae family, was recently investigated popularly of biological roles; mainly antioxidant and antimicrobial activities. However, there is very scarce data on the cytogenetic effects of Thyme species. Therefore, in this study, we aimed to determine whether T. spicata extracts conferred a protection against Chromium (III) chloride (CrCl3)-induced genotoxic and oxidative damage in vitro. For this aim, we determined sister chromatid exchange (SCE) rates and main antioxidant enzyme activities including catalase (CAT) superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) in CrC3l (25 mu M) and T. spicata extracts (TSE) (25, 50, 100 mu M) treated human whole blood cultures (n=3) for 72h. T. spicata extracts at tested concentrations did not exhibit any negative effects on above studied parameters in culture tubes. Besides, the results of the present study indicated that the increases of SCE frequencies and the decreases of antioxidant enzyme activities by CrCl3 were minimized by the application of the T. spicata extracts. Our results firstly suggest that T. spicata augments the antioxidants defense against CrCl3 induced toxicity. Based on the results of this study, it may be concluded that dose controlled T. spicata diet may play a protective role in the process of Cr mutagenesis and/or carcinogenesis.