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    Effects of 2.4 GHz radiofrequency radiation emitted from Wi-Fi equipment on microRNA expression in brain tissue
    (Taylor & Francis Ltd, 2015) Dasdag, Suleyman; Akdag, Mehmet Zulkuf; Erdal, Mehmet Emin; Erdal, Nurten; Ay, Ozlem Izci; Ay, Mustafa Ertan; Yilmaz, Senay Gorucu
    Purpose: MicroRNAs (miRNA) play a paramount role in growth, differentiation, proliferation and cell death by suppressing one or more target genes. However, their interaction with radiofrequencies is still unknown. The aim of this study was to investigate the long-term effects of radiofrequency radiation emitted from a Wireless Fidelity (Wi-Fi) system on some of the miRNA in brain tissue. Materials and methods : The study was carried out on 16 Wistar Albino adult male rats by dividing them into two groups such as sham (n = 8) and exposure (n = 8). Rats in the exposure group were exposed to 2.4 GHz radiofrequency (RF) radiation for 24 hours a day for 12 months (one year). The same procedure was applied to the rats in the sham group except the Wi-Fi system was turned off. Immediately after the last exposure, rats were sacrificed and their brains were removed. miR-9-5p, miR-29a-3p, miR-106b-5p, miR-107, miR-125a-3p in brain were investigated in detail. Results: The results revealed that long-term exposure of 2.4 GHz Wi-Fi radiation can alter expression of some of the miRNAs such as miR-106b-5p (adj p* = 0.010) and miR-107 (adj p* = 0.005). We observed that mir 107 expression is 3.3 times and miR-106b-5p expression is 3.65 times lower in the exposure group than in the control group. However, miR-9-5p, miR-29a-3p and miR-125a-3p levels in brain were not altered. Conclusion: Long-term exposure of 2.4 GHz RF may lead to adverse effects such as neurodegenerative diseases originated from the alteration of some miRNA expression and more studies should be devoted to the effects of RF radiation on miRNA expression levels.
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    Long term and excessive use of 900 MHz radiofrequency radiation alter microRNA expression in brain
    (Taylor & Francis Ltd, 2015) Dasdag, Suleyman; Akdag, Mehmet Zulkuf; Erdal, Mehmet Emin; Erdal, Nurten; Ay, Ozlem Izci; Ay, Mustafa Ertan; Yilmaz, Senay Gorucu
    Purpose : We still do not have any information on the interaction between radiofrequency radiation (RF) and miRNA, which play paramount role in growth, differentiation, proliferation and cell death by suppressing one or more target genes. The purpose of this study was to bridge this gap by investigating effects of long-term 900 MHz mobile phone exposure on some of the miRNA in brain tissue. Materials and methods : The study was carried out on 14 Wistar Albino adult male rats by dividing them into two groups: Sham (n = 7) and exposure (n = 7). Rats in the exposure group were exposed to 900 MHz RF radiation for 3 h per day (7 days a week) for 12 months (one year). The same procedure was applied to the rats in the sham group except the generator was turned off. Immediately after the last exposure, rats were sacrificed and their brains were removed. rno-miR-9-5p, rno-miR-29a-3p, rno-miR-106b-5p, rno-miR-107 and rno-miR-125a-3p in brain were investigated in detail. Results : Results revealed that long-term exposure of 900 MHz RF radiation only decreased rno-miR107 (adjP* = 0 .045) value where the whole body (rms) SAR value was 0.0369 W/kg. However, our results indicated that other microRNA evaluated in this study was not altered by 900 MHz RF radiation. Conclusion : 900 MHz RF radiation can alter some of the miRNA, which, in turn, may lead to adverse effects. Therefore, further studies should be performed.
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    Öğe
    MicroRNA dysregulation in manic and euthymic patients with bipolar disorder
    (Elsevier, 2020) Camkurt, Mehmet Akif; Karababa, Ibrahim Fatih; Erdal, Mehmet Emin; Kandemir, Sultan Basmaci; Fries, Gabriel R.; Bayazit, Huseyin; Ay, Mustafa Ertan
    Background: Bipolar disorder (BPD) is a major psychiatric disorder with an unclear pathophysiology. Peripheral blood samples are easily drawn, making them are good candidates for diagnosing diseases. MicroRNAs are small non-coding RNA transcripts that regulate gene expression by binding to the 3'-UTR of mRNAs and directing their degradation. The aim of this study was to use blood plasma to investigate microRNA dysregulations in bipolar manic and euthymic patients. Subjects and Methods: Blood samples were collected from 58 patients with bipolar I disorder (19 manic, 39 euthymic) and 51 healthy controls. Results: Four microRNAs (miR-29a-3p, p= 0.035; miR-106b-5p, p= 0.014; miR-107, p= 0.011; and miR-125a-3p, p= 0.014) were upregulated in the entire bipolar group, compared to the healthy controls. Seven microRNAs (miR-9-5p, p= 0.032; miR-29a-3p, p= 0.001; miR-106a-5p, p= 0.034; miR-106b-5p, p= 0.003; miR-107, p< 0.001; miR-125a-3p, p= 0.016; and miR-125b-5p, p= 0.004) were more upregulated in bipolar manic patients compared to the healthy controls, and two microRNAs (miR-106a-5p, p= 0.013, and miR-107, p= 0.021) showed statistically significant upregulation in the manic patients compared to the euthymic patients. Conclusions: Our results showed greater miRNA dysregulation in the manic patients than in the euthymic patients. Two microRNAs could be more selective for bipolar manic episodes. Future studies should include depressive patients along with euthymic and manic patients.