Yazar "Dursunoglu, Duygu" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    The Effects of Adipose-Derived Mesenchymal Stem Cells and Adipose-Derived Mesenchymal Stem Cell-Originating Exosomes on Nerve Allograft Regeneration An Experimental Study in Rats
    (Lippincott Williams & Wilkins, 2023) Koplay, Tugba Gun; Yildiran, Gokce; Dursunoglu, Duygu; Aktan, Murad; Duman, Selcuk; Akdag, Osman; Karamese, Mehtap
    IntroductionNerve regeneration has been the subject of many studies because of its complex mechanism and functional outcome. Mesenchymal stem cells and exosomes are promising factors in regeneration in many areas. Reconstruction of nerve defects is a controversial issue, and nerve allografts are promising alternatives with many advantages. In this study, it is aimed to evaluate the nerve regeneration in cellularized and decellularized nerve allografts and whether it is possible to accelerate this process with adipose-derived mesenchymal stem cells (ad MSC) or ad MSC-originating exosomes.MethodThis study was performed with 36 Lewis and 18 Brown Norway isogenic male rats aged 10 to 12 weeks and weighing 300 to 350 g. The Lewis rats were divided into 6 groups. Nerve allografts at a length of 12 mm that were obtained from the Brown Norway rats' proximal portion of both sciatic nerve branching points were coapted as cellularized in group A and decellularized in group B to the sciatic nerve defects of the Lewis rats. Group A received oral tacrolimus (0.2 mg/kg) for 30 days. Perineural saline (A1-B1), ad MSC (A2-B2), or ad MSC-originating exosomes (A3-B3) were applied to these groups. Walking track analysis, pinch-prick test and electromyelography were applied at the 8th and 16th weeks following surgery. Nerves were examined histopathologically at the 16th week.ResultsBetween cellularized groups, better results were shown in A3 about axon-myelin regeneration/organization (P = 0.001), endoneural connective tissue (P = 0.005), and inflammation (P = 0.004). Better results were shown in the B2 and B3 groups electromyelographicaly about latency period (P = 0.033) and action potential (P = 0.008) at late period, and histomorphologicaly at vascularization (P = 0.012).DiscussionIt is argued that regeneration is accelerated with decellularization of nerve allografts by removing the chondroidin sulfate proteoglycans. The positive effects of stem cells are derived by exosomes without the cell-related disadvantages. In this study, better results were obtained by decellularization and perineural application of ad MSC and/or ad MSC exosome.
  • Küçük Resim Yok
    Öğe
    The effects of Juglone-Selenium combination on invasion and metastasis in pancreatic cancer cell lines
    (Makerere Univ, Coll Health Sciences,Sch Med, 2022) Arikoglu, Hilal; Dursunoglu, Duygu; Kaya, Dudu Erkoc; Avci, Ebru
    Background: Pancreatic cancer does not show any symptoms in the early period and metastatic process is already passed when the diagnosis is done. Therefore, in the battle with pancreatic cancer, novel treatment strategies, particularly antiinva-sive and antimetastatic strategies, are needed. The cytotoxic and anticancer effects of juglone and sodium selenite (NaSe) have been showed in various cancer cells. Objectives: In this study, it is aimed to investigate the synergistic effects of juglone and selenium on PANC-1 and BxPC-3 pancreatic cancer cells. Methods: Antimetastatic effects of juglone-NaSe were carried out by adhesion and invasion assays and the genes and pro-tein expressions. Expression analysis of the CDH1, ITGB3 and COL4A3 genes and their proteins E-cadherin, beta 3 integrin and tumstatin which play role in metastasis and angiogenesis processes, were done by qPCR and immunohistochemical analysis, respectively. Results: Study findings have provided evidences that the juglone-selenium has a cytotoxic and dose dependent suppressive effect on invasion and metastasis in PANC-1 and BxPC-3 cells. Conclusion: The juglone-NaSe has the potential to be a promising agent especially to inhibit invasion and metastasis in pan-creatic cancer treatment. However, more in depth studies are needed to more clearly demonstrate the effects of juglone-se-lenium.
  • Küçük Resim Yok
    Öğe
    Evaluation of sialic acid, malondialdehyde and glutathione levels in infertile male
    (Elsevier Espana Slu, 2022) Menevse, Esma; Dursunoglu, Duygu; Cetin, Nihal; Korucu, Emine Nedime; Erbayram, Fatma Zehra
    Introduction and objectives: Around 15% of productive couples in the world are infertile. Recent years, biochemical mechanisms leads to male infertility are started to research. Redox regulation and oxidative stress (OS) show importance in the pathogenesis of infertility in male. Malondialdehyde (MDA) and Glutathione (GSH) are biochemical indicatives of sperm damage by reactive oxygen species (ROS). In addition, sperm are coated with a thick glycocalyx rich in sialic acids. It is aimed to determine and evaluate the differences between normozoosper-mic and oligozoospermic individuals according to sialic acid, MDA and GSH concentrations and correlations between spermyogram and these parameters. Material and methods: This study was carried out on seminal plasma of individuals who admit-ted to Selcuk University Faculty of Medicine IVF Unit Andrology Laboratory. The groups were divided into two as normozoospermics (n = 30, sperm concentration >= 15 million/mL), and oligozoospermics (n = 30, sperm concentration < 15 million/mL). Spermyogram were evaluated regarding WHO (2010) Kruger criteria. GSH, MDA and sialic acid concentrations were analyzed in seminal plasma. Diagnostic performance of sialic acid has been determined with ROC curve analysis. Results: Sialic acid levels were significantly lower in Normozoospermic than Oligozoosper-mic individuals (p < 0.0001), MDA and GSH levels were not differ significantly in both groups (p > 0.05). Sialic acid correlated significantly with most of the spermyogram findings. When diagnostic performance of sialic acid was evaluated, the cut off value of sialic acid found as 4.175 nmol/mL by ROC curve. Conclusion: High seminal plasma sialic acid levels may be used as a biomarker and sialic acid is important determinant in oligozoospermia. (c) 2022 Asociacion Espan tilde ola de Andrologi acute accent a, Medicina Sexual y Reproductiva. Published by Else-vier Espan tilde a, S.L.U. All rights reserved.
  • Küçük Resim Yok
    Öğe
    THE LEVELS OF ADENOSINE TRIPHOSPHATE SYNTHASE 6, MANGANESE SUPEROXIDE DISMUTASE, NADPH-CYTOCHROME P450 REDUCTASE, LACTATE DEHYDROGENASE IN SEMINAL PLASMA OF OLIGOZOOSPERMIA AND NORMOZOOSPERMIA MEN
    (Nobel Ilac, 2023) Menevse, Esma; Dursunoglu, Duygu; Korucu, Emine Nedime; Cetin, Nihal; Erbayram, Fatma Zehra
    Objective: In recent years, energy production and enzymes in mitochondrial pathways are an important in male fertilization.Material and Method: For this purpose, we tried to determine the relationship between normozoospermia and oligozoospermia individuals according to levels of some mitochondrial enzymes. The seminal plasma levels of mitochondrial encoded adenosine triphosphate synthase 6 (mtATP6), manganese superoxide dismutase (Mn-SOD), NADPH-cytochrome P450 reductase (CPR), lactate dehydrogenase (LDH) were analyzed and assessed their correlations between data of spermogram. The study was composed of two groups consisting of normozoospermic and oligozoospermic volunteers.Results: mtATP6 levels were significantly higher in normozoospermia (0.97 & PLUSMN;0.50 ng/mg protein, p=0.008) than oligozoospermia (0.64 & PLUSMN;0.32 ng/mg protein). LDH levels were higher in normozoospermia (0.25 & PLUSMN;0.074 U/ mg protein, p=0.007) than oligozoospermia (0.199 & PLUSMN;0.049 ng/mg protein). The groups did not differ in terms of MnSOD and CPR levels. mtATP6 levels were significantly correlated with sperm concentration, total number and total motility, immotility, total progressive motile sperm count (TPMSC) and long head anomaly. LDH levels were related with long head and short tail anomaly.Conclusion: We observed some of the spermatogenetic anomalies are caused by defects in energy regulation. We did not find any evidence on MnSOD and CPR activity regarded as determinative parameters in response to increased oxidative stress in oligozoospermia.