Person: YENİGÜN, VILDAN BETÜL
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Publication Open Access Circulating furin, IL-6, and presepsin levels and disease severity in SARS-CoV-2-infected patients(2021-06-01T00:00:00Z) Kocyigit, Abdurrahim; Sogut, Ozgur; Kanimdan, Ebru; Guler, Eray Metin; Kaplan, Onur; Eren, Canan; Ozman, Zeynep; Yasar, Oznur; KOÇYİĞİT, ABDÜRRAHİM; BALKAN, EZGİ; KANIMDAN, EBRU; YENİGÜN, VILDAN BETÜL; ÖZMAN, ZEYNEPCoronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has resulted in a vast number of infections and deaths that deeply affect the world. When the virus encounters the host cell, it binds to angiotensin-converting enzyme 2, then the S protein of the virus is broken down by the transmembrane protease serine 2 with the help of furin, allowing the virus to enter the cell. The elevated inflammatory cytokines suggest that a cytokine storm, also known as cytokine release syndrome, may play a major role in the pathology of COVID-19. Therefore, the aim of this study is to investigate the relationship between circulating furin levels, disease severity, and inflammation in patients with SARS-CoV-2. A total of 52 SARS-CoV-2 patients and 36 healthy control participants were included in this study. SARS- CoV-2 patients were scored by the disease activity score. Serum furin, presepsin, and interleukin-6 (IL-6) levels were assessed using an enzyme-linked immunosorbent assay. The mean furin, presepsin, and IL-6 levels were significantly higher in the peripheral blood of SARS-CoV-2 compared to the controls (p < 0.001). There were close positive relationship between serum furin and IL-6, furin and presepsin, and furin and disease severity (r = 0.793, p < 0001; r = 0.521, p < 0.001; and r = 0,533, p < 0.001, respectively) in patients with SARS-CoV-2. These results suggest that furin may contribute to the exacerbation of SARS-CoV-2 infection and increased inflammation, and could be used as a predictor of disease severity in COVID-19 patients.Publication Metadata only Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy.(2013-06-01T00:00:00Z) Yenigun, VİLDAN BETÜL; OZPOLAT, B; KOSE, GT; YENİGÜN, VILDAN BETÜLPublication Metadata only Diklofenak Sodyum, İbuprofen ve Parasetamol İçeren Nazal Analjezik Spreylerin Formülasyonu ve İn Vitro Toksisitesinin Değerlendirilmesi(2022-11-16) Yenigün A.; Sütcü A. O.; Yenigün V. B.; Sağıroğlu A. A.; Koçyiğit A.; Özturan O.; YENİGÜN, ALPER; SÜTÇÜ, AHMET ONUR; YENİGÜN, VILDAN BETÜL; KOÇYİĞİT, ABDÜRRAHİM; ÖZTURAN, ORHANPublication Metadata only NF-kappa B Inhibition Activity of Curcumin-Loaded Sterically Stabilized Micelles and Its Up-Regulator Effect on Enhancement of Cytotoxicity of a New Nano-Pirarubicin Formulation in the Treatment of Breast Cancer(2019-09-01) Eskandari, Zahra; BAHADORİ, FATEMEH; Yapaoz, Melda Altkatoglu; Yenign, VİLDAN BETÜL; KOÇYİĞİT, ABDÜRRAHİM; Onyuksel, Hayat; BAHADORİ, FATEMEH; YENİGÜN, VILDAN BETÜL; KOÇYİĞİT, ABDÜRRAHİMThis study aims to investigate the effects of co-administration of nano-Curcumin on anticancer effect of nano-Pirarubicin considering the fact that the clinical use of Pirarubicin and other anthracyclines has been limited by development of multidrug resistance (MDR) and based on previous data which have shown that Curcumin can down-regulate MDR proteins and suppress the activity of Nuclear factor-kappa B (NF-kappa B) a protein involved in chemoresistance. Nano micellar formulations of both Curcumin and Pirarubicin were separately synthesized using 1,2 -Distearoyl-sn-glycero-3-phosphoethanolamine-N-methoxy-[poly (ethylene glycol); PEG MW 2,000] (DSPE-PEG2000). The produced sterically stabilized micelles (SSM) are very well known drug delivery systems in terms of their enhanced efficacy and good toxicity profile. We measured the differences of NF-kappa B levels in two different situations: when Pirarubicin is used alone and when it is co-administered with Curcumin. This study showed that co-administration of SSM-Curcumin (CSSM) and SSM-Pirarubicin (PSSM) with size of 12.81 nm enhances the efficacy of Pirarubicin by suppressing P65, an NF-kappa B subunit. Furthermore, we showed that SSM is able to successfully enhance water solubility and therapeutic stability of curcumin for using as a complementary agent.Publication Open Access Investigation of the role of major respiratory viruses in the aetiology of nasal polyps using polymerase chain reaction technique(2014-04-01) YENIGUN, A.; AKSOY, FEYZA MÜBERRA; DOGAN, REMZİ; Yilmaz, F.; Ozturan, ORHAN; AKSOY, FADLULLAH; YENİGÜN, ALPER; DOĞAN, REMZI; ÖZTURAN, ORHAN; YENİGÜN, VILDAN BETÜLObjective: We aimed to identify the role of major respiratory viruses in the aetiology of human nasal polyps using polymerase chain reaction technique. Methods: Thirty patients with nasal polyps and a group of 20 healthy patients (control group) were included in this study. Mucosa was obtained from the polyps of patients with nasal polyposis and from the middle turbinate of the control group patients by means of biopsy. The samples were stored at -80 °C until molecular analysis by polymerase chain reaction was carried out. Results: In the control group, the human coronavirus and human rhinovirus were diagnosed in one of the patients and the human respiratory syncytial virus in another. In the group with nasal polyposis, the influenza B virus was identified in one of the patients and the human coronavirus in another. Conclusion: The results did not demonstrate a statistically significant relationship between nasal polyposis and respiratory viruses.Publication Open Access Quercus pyrenaica Honeydew Honey With High Phenolic Contents Cause DNA Damage, Apoptosis, and Cell Death Through Generation of Reactive Oxygen Species in Gastric Adenocarcinoma Cells(2019-09-01) KOÇYİĞİT, ABDÜRRAHİM; Aydogdu, Gokhan; BALKAN, EZGİ; GÜLER, Eray Metin; BULUT, HURİ; KÖKTAŞOĞLU, FATMANUR; Goeren, AHMET CEYHAN; Atayoglu, Ali Timucin; KOÇYİĞİT, ABDÜRRAHİM; BALKAN, EZGİ; YENİGÜN, VILDAN BETÜL; GÜLER, ERAY METİN; BULUT, HURI; KÖKTAŞOĞLU, FATMANUR; GÖREN, AHMET CEYHANMany studies have shown that honey with high phenolic contents prevents cancer formation. Furthermore, recent studies have demonstrated that honey can be used for the treatment of cancer as well as cancer prevention. Antineoplastic effects of honey are often associated with their antioxidant phenolic contents. However, very few studies have dealt with the association of phenolic contents of honeys in terms of antiproliferative effects. The aim of this study was, therefore, to elucidate the cytotoxic, genotoxic, apoptotic, and reactive oxygen species (ROS) generating effects of honey samples on the basis of their phenolic and flavonoid contents. Fourteen different honey varieties were collected from various parts of Turkey, and their characteristics regarding total phenols, flavonoids, and antioxidant contents were determined to test their effects on gastric cancer cells (AGS). For convenience, 2 honey varieties were selected, namely, Ida Mountains Quercus pyrenaica honeydew honey (QPHH-IM) having the highest phenolic and antioxidant content and Canakkale multifloral honey (MFH-C) with the lowest phenolic and antioxidant content. Levels of 11 different phenolic compounds in QPHH-IM and MFH-C samples were determined by LC-MS/MS. AGS cells were incubated with different concentrations of QPHH-IM and MFH-C for 24 hours, then the cell viability, DNA damage, apoptosis, and generation of ROS were determined. We found that QPHH-IM had more cytotoxic, genotoxic, and apoptotic effects than that of MFH-C. We think that these effects are probably related to pro-oxidant activities due to the high phenolic contents present. Therefore, further research on high-phenolic honey may contribute to the future development of cancer therapeutics.Publication Metadata only Hedera helix (Wall Ivy) leaf ethanol extract shows cytotoxic and apoptotic effects in glioblastoma cells by generating reactive oxygen species(2023-12-01) Yenigün V. B.; Koçyiğit A.; Kanımdan E.; Durmuş E.; Köktaşoğlu F.; YENİGÜN, VILDAN BETÜL; KOÇYİĞİT, ABDÜRRAHİM; KANIMDAN, EBRU; BALKAN, EZGİ; KÖKTAŞOĞLU, FATMANUR