Yazar "Bengu, A. Sukru" seçeneğine göre listele

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    In Vivo and in Vitro Regulatory Effect of Silibinin on Some Metabolic Enzyme Activities against Cobalt Induced Toxicity in Rats: A Biochemical Approach
    (Amer Chemical Soc, 2023) Temel, Yusuf; Akkoyun, H. Turan; Akkoyun, Mahire Bayramoglu; Karagozoglu, Fatma; Melek, Sule; Bengu, A. Sukru; Erdem, Sinem Aslan
    The study aimed to examine the in vivo inhibition effect of cobalt ion and silibinin on metabolic enzymes such as glucose-6-phosphate dehydrogenase (G6PD), 6-phosphogluconate dehydrogenase (6PGD), glutathione reductase (GR), and glutathione S-transferase (GST) and their in vitro inhibition effect on 6PGD. Twenty-four Wistar Albino rats weighing approximately 250-300 g were used in the study. The rats were divided into 4 groups as group 1 (control): isotonic serum (0.5 mL i.p), group 2 (cobalt): (150 mg kg/day cobalt), group 3 (silibinin): (100 mg/kg/day silibinin), group 4 (cobalt + silibinin). As a result of the in vivo applications, a statistically significant decrease was observed in the activities of G6PD (p < 0.05), 6PGD (p < 0.05), GR (p < 0.05), and GST (p < 0.05) enzymes in the groups that were administered cobalt compared to the control group. It was also found that the activities of G6PD (p < 0.05), 6PGD (p > 0.05), GR (p > 0.05), and GST (p > 0.05) enzymes increased in groups that were administered cobalt + silibinin compared to the group that was administered cobalt. As for in vitro applications, it was found that different Co2+ ions inhibited 6PGD enzyme which was obtained as a result of purification with IC50 = 346.6 mu M value, while silibinin increased 6PGD enzyme activity within the concentration range of 100-750 mu M by 40%. As a result, it was found that cobalt ions had an inhibition effect on G6PD, GR, and GST enzymes, which are vitally important for living metabolism, in vitro and in vivo and inhibited 6PGD enzyme activity in vitro, and silibinin increased these enzyme activities in vivo and 6PGD enzyme activity both in vivo and in vitro and decreased the inhibition effect.
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    The effect of astaxanthin and cadmium on rat erythrocyte G6PD, 6PGD, GR, and TrxR enzymes activities in vivo and on rat erythrocyte 6PGD enzyme activity in vitro
    (Wiley, 2018) Akkoyun, Mahire Bayramoglu; Bengu, A. Sukru; Temel, Yusuf; Akkoyun, H. Turan; Ekin, Suat; Ciftci, Mehmet
    In this study, the effects of astaxanthin (AST) that belongs to carotenoid family and cadmium (Cd), which is an important heavy metal, on rat erythrocyte G6PD, 6PGD, GR, and TrxR enzyme activities in vivo and on rat erythrocyte 6PGD enzyme activity in vitro were studied. In in vitro studies, 6PGD enzyme was purified from rat erythrocytes with 2',5'-ADP Sepharose4B affinity chromatography. Results showed inhibition of enzyme by Cd at IC50; 346.5 mu M value and increase of 6PGD enzyme activity by AST. In vivo studies showed an increase in G6PD, 6PGD. and GR enzyme activities (P > 0.05) and no chance in TrxR enzyme activity by AST. Cd ion inhibited GbPD, 6PGD, and GR enzyme activities (P < 0.05) and also decreased TrxR enzyme activity (P > 0.05). AST + Cd group G6PD enzyme activity was statistically low compared with control group (P < 0.05). 6PGD and TrxR enzyme activities decreased without statistical significance (P > 0.05); however, GR enzyme activity increased statistically significantly (P < 0.05).
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    The Effects of Sodium Tetraborate against Lead Toxicity in Rats: The Behavior of Some Metabolic Enzymes
    (Amer Chemical Soc, 2023) Akkoyun, Mahire Bayramog; Temel, Yusuf; Akkoyun, H. Turan; Melek, Sule; Karagozoglu, Fatma; Bengu, A. Sukru; Gecmez, Kubra
    This study was planned to research the in vivo effects of lead (Pb) ions and sodium tetraborate (Na2B4O7) on G6PD and 6PGD, which are some of the enzymes of the pentose phosphate pathway, which carries vital importance for metabolism, and GR and GST, which are glutathione metabolism enzymes, and the in vitro effects of the same agents on the 6PGD enzyme. According to the in vivo analysis results, in comparison to the control group, the rat liver G6PD (p < 0.05), and 6PGD (p < 0.01) enzyme activities in the Na2B4O7 group were significantly lower. In addition, GR and GST enzyme activities were insignificantly lower in the Na2B4O7 group compared to the control group (p > 0.05). The Pb group had lower G6PD and 6PGD enzyme activity levels and higher GR and GST enzyme activity levels compared to the control group, while these changes did not reach statistical significance (p > 0.05). In the in vitro analyses of the effects of Pb ions on the 6PGD enzyme that was purified out of rat liver with the 2 ',5 '-ADP-Sepharose 4B affinity chromatography method, it was determined that Pb ions (200-1200 mu M) increased the rat liver 6PGD enzyme activity levels by 33%. On the other hand Na2B4O7 was not significantly effective on 6PGD activity. These results will also contribute to future studies in understanding the physiopathology of the states triggered by Pb ions and sodium tetraborate (Na2B4O7).