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    Effect of ovarian stimulation on the expression of piRNA pathway proteins
    (Public Library Science, 2020) Sari, Ismail; Gumus, Erkan; Taskiran, Ahmet Sevki; Sokmensuer, Lale Karakoc
    PIWI-interacting RNAs (piRNAs) play an important role in gametogenesis, fertility and embryonic development. The current study investigated the effect of different doses of pregnant mare serum gonadotrophin/human chorionic gonadotrophin (PMSG/hCG) and repeated ovarian stimulation (OS) on the expression of the Mili, Miwi, Mael, Tdrd1, Tdrd9, qnd Mitopld genes, which have crucial roles in the biogenesis and function of piRNAs. Here, we found that after treatment with 7.5 I.U. PMSG/hCG and two repeated rounds of OS, both the mRNA and protein levels of Tdrd9, Tdrd1 and Mael showed the greatest decrease in the ovarian tissue, but the plasma E-2 levels showed the strongest increases (p< 0.05). However, we found that the Mitopld, Miwi and Mili gene levels were decreased significantly after treatment with 12.5 I.U. PMSG/hCG. Our results suggested that exogenous gonadotropin administration leads to a significant decrease in the expression of the Mili, Miwi, Mael, Tdrd1, Tdrd9 and Mitopld genes, which are critically important in the piRNA pathway, and the changes in the expression levels of Tdrd9, Tdrd1 and Mael may be associated with plasma E-2 levels. New comprehensive studies are needed to reduce the potential effects of OS on the piRNA pathway, which silences transposable elements and maintains genome integrity, and to contribute to the safety of OS.
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    Expression levels of BAP1, OGT, and YY1 genes in patients with eyelid tumors
    (Walter De Gruyter Gmbh, 2021) Tas, Ayca; Gumus, Erkan; Ozmen, Esma; Erdogan, Haydar; Silig, Yavuz
    Objectives The aim of this study was to investigate BAP1, OGT and YY1 genes and protein levels in 12 samples (8 males, 4 females) of eyelid tumor tissue with basal cell carcinoma (BCC) and 12 normal control subjects (8 males, 4 females). Methods The expression levels of these genes were determined with RT-PCR and the protein levels and expression using ELISA and IHC methods, respectively. Results In RT-PCR analysis, statistically significant upregulated expression was determined of 1.84-fold of BAP1, 2.85-fold of OGT and 3.06-fold of YY1 genes (p < 0.05). In the patient group, compared to the control group, there was a similar statistically significant strong correlation between the proteins (BAP1 and YY1; r = 0.850, BAP1 and OGT; r = 0.811, OGT and YY1; r = 0.755) (p < 0.05). In the ELISA and IHC analysis methods, a significant increase in BAP1 and YY1 protein expression levels was observed compared to the control group (p < 0.05). Conclusions The study results demonstrated that BAP1 and YY1 genes and protein levels were upregulated in eyelid tumor tissue with BCC.