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    Baseline serum vitamin A and vitamin C levels and their association with disease severity in COVID-19 patients
    (Mattioli 1885, 2023) Yilmaz, G.; Bulut, H.; Omaygenc, D.O.; Akca, A.; Can, E.; Tuten, N.; Bestel A.
    Aim: We aimed to investigate the association between the serum concentrations of Vitamin A and Vitamin C and the severity of the COVID-19. Methods: Fifty-three consecutive PCR (+) COVID-19 patients admitted to a dedicated ward were enrolled in this study. Blood samples for serum Vitamin A and C measurements were drawn from all participants upon admission. All subjects underwent thoracic CT imaging prior to hospitalization. CT severity score (CT-SS) was then calculated for determining the extent of pulmonary involvement. A group of healthy volunteers, in whom COVID-19 was ruled out, were assigned to the control group (n=26). These groups were compared by demographic features and serum vitamin A and C levels. The relationship between serum concentrations of these vitamins and pre-defined outcome measures, CT-SS and length of hospitalization (LOH), was also assessed. Results: In COVID-19 patients, serum Vitamin A (ng/ml, 494±96 vs. 698±93; p<0.001) and Vitamin C (ng/ml, 2961 [1991-31718] vs. 3953 [1385-8779]; p=0.007) levels were significantly lower with respect to healthy controls. According to the results of correlation analyses, there was a significant negative association between Vitamin A level and outcome measures (LOH, r=-0.293; p=0.009 and CT-SS, r=-0.289; p=0.010). The negative correlations between Vitamin C level and those measures were even more prominent (LOH, r=-0.478; p<0.001 and CT-SS, r=-0.734: p<0.001). Conclusion: COVID-19 patients had lower baseline serum Vitamin A and Vitamin C levels as compared to healthy controls. In subjects with COVID-19, Vitamin A and Vitamin C levels were negatively correlated with CT-SS and LOH. (www.actabiomedica.it). © 2023, Mattioli 1885. All rights reserved.
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    Can M-30, M-65, and IL-6 serum levels be useful markers in the diagnosis of preeclampsia and gestational diabetes?
    (Verduci Publisher, 2023) Jafarzade, A.; Bulut, B.; Bulut, H.; Mihmanli, V.
    - OBJECTIVE: We aimed to evaluate the maternal and fetal serum M-30, M-65 and IL -6 levels in preeclampsia and gestational diabetes mellitus (GDM) in both maternal and cord blood. PATIENTS AND METHODS: Women with pre-eclampsia (n=30), GDM (n=30), and uncomplicated pregnancy (n=28) were evaluated in a cross-sec-tional study. After clamping during delivery, the serum M-30, M-65, and IL-6 levels were measured in both maternal venous blood and cord blood.RESULTS: The serum M-30, M-65, and IL-6 levels were significantly higher in preeclampsia and GDM patients' maternal blood and cord blood samples compared to the control group. In the preeclampsia group, M-65 was significantly high-er in cord blood compared with the level in mater -nal serum, but there was no significant difference between the GDM and control groups. The con-trol group's IL-6 level in cord blood was statisti-cally significantly lower than the other groups. Al-though the M-30 value in both maternal and cord blood was statistically lower in the control group than in the GDM group, there was no significant difference between the two groups when com-pared to the preeclampsia group.CONCLUSIONS: M-30 and M-65 molecules appear to have the potential to serve as bio-chemical markers in placental diseases, partic-ularly preeclampsia and gestational diabetes. Due to the insufficient sample sizes, more re-search is needed.
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    Impaired memory by hippocampal oxidative stress in rats exposed to 900 MHz electromagnetic fields is ameliorated by thymoquinone
    (Taylor and Francis Ltd., 2022) Üstünova, S.; Kılıç, A.; Bulut, H.; Gürel-Gürevin, E.; Eriş, A.H.; Meral, I.
    The protective effects of thymoquinone on learning and memory abilities and on hippocampal oxidative stress in rats exposed to 900 MHz electromagnetic field radiation at s strength of 6.0 ± 0.5 V/m for 1 h on each of 15 days was studied. Thymoquinone-treatment (10 mg/kg/day) of radiation-exposed rats resulted in better performance than that of radiation-exposed rats not receiving thymoquinone. Electromagnetic field-exposure led to increased hippocampal superoxide dismutase, glutathione peroxidase, and malondialdehyde levels and to lowered brain-derived neurotrophic factor level; thymoquinone treatment ameliorated all four parameters. Also, in the electromagnetic field-exposed group, N-methyl-D-aspartate receptor expression decreased, and gamma-aminobutyric-acid alpha receptor expression increased, which was reversed by thymoquinone treatment. In conclusion, treatment with the thymoquinone ameliorated the impact of the exposure to EMF and provided a hint on the mechanism involving oxidative stress. © 2022 Informa UK Limited, trading as Taylor & Francis Group.