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Aydemir E, Yılmaz NZ, Bayrak ÖF, Sahin F. Investigating the Effects of Chordoma Cell-Derived Exosomes on the Tumorigenicity of Nucleus Pulposus Cells. J Neurol Surg B Skull Base 2024; 85:161-167. [PMID: 38449582 PMCID: PMC10914466 DOI: 10.1055/a-2018-4627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 01/17/2023] [Indexed: 01/26/2023] Open
Abstract
Objective Interaction of tumor cells with the surrounding environment is essential for tumor growth and progression that eventually leads to metastasis. Growing evidence shows that extracellular vesicles also known as exosomes play a crucial role in signaling between the tumor and its microenvironment. Tumor-derived exosomes have generally protumorigenic effects such as metastasis, hypoxia, angiogenesis, and epithelial-mesenchymal transition. Methods In this study, exosomes were isolated from a chordoma cell line, MUG-Chor1, and characterized subsequently. The number of exosomes was determined and introduced into the healthy nucleus pulposus (NP) cells for 140 days. The protumorigenic effects of a chordoma cell line-derived exosomes that initiate the tumorigenesis on NP cells were investigated. The impact of tumor-derived exosomes on various cellular events including cell cycle, migration, proliferation, apoptosis, and viability has been studied by treating NP cells with chordoma cell-line-derived exosomes cells. Results Upon treatment with exosomes, the NP cells not only gained a chordoma-like morphology but also molecular characteristics such as alterations in the levels of certain gene expressions. The migratory and angiogenic capabilities of NP cells increased after treatment with chordoma-derived exosomes. Conclusion Based on our findings, we can conclude that exosomes carry information from tumor cells and may exert tumorigenic effects on nontumorous cells.
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Affiliation(s)
- Esra Aydemir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Türkiye
| | - Nur Zübeyda Yılmaz
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Türkiye
| | - Ömer Faruk Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul, Türkiye
| | - Fikrettin Sahin
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Türkiye
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2
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Aydemir E, Odabaş Köse E, Yavuz M, Kilit AC, Korkut A, Özkaya Gül S, Sarikurkcu C, Celep ME, Göktürk RS. Phenolic Compound Profiles, Cytotoxic, Antioxidant, Antimicrobial Potentials and Molecular Docking Studies of Astragalus gymnolobus Methanolic Extracts. Plants (Basel) 2024; 13:658. [PMID: 38475504 DOI: 10.3390/plants13050658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/19/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024]
Abstract
Since Astragalus is a genus with many important medicinal plant species, the present work aimed to investigate the phytochemical composition and some biological activities of Astragalus gymnolobus. The methanolic fractions of four organs (stems, flowers, leaves, root and whole plant) were quantified and identified by Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC-ESI-MS/MS) analysis. Hesperidin, hyperoside, p-hydroxybenzoic acid, protocatechuic acid and p-coumaric acid were identified as main compounds among the extracts. Among all cells, leaf methanol (Lm) extract had the highest cytotoxic effect on HeLa cells (IC50 = 0.069 μg/mL). Hesperidin, the most abundant compound in A. gymnolobus extract, was found to show a strong negative correlation with the cytotoxic effect observed in HeLa cells according to Pearson correlation test results and to have the best binding affinity to targeted proteins by docking studies. The antimicrobial activity results indicated that the most susceptible bacterium against all extracts was identified as Streptococcus pyogenes with 9-11 mm inhibition zone and 8192 mg/mL MIC value. As a result of the research, it was suggested that A. gymnolobus could be considered as a promising source that contributes to the fight against cancer.
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Affiliation(s)
- Esra Aydemir
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
| | - Elif Odabaş Köse
- Medical Laboratory Program, Vocational School of Health Services, Akdeniz University, Antalya TR-07058, Turkey
| | - Mustafa Yavuz
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
| | - A Cansu Kilit
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
| | - Alaaddin Korkut
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
| | - Serap Özkaya Gül
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
| | - Cengiz Sarikurkcu
- Department of Analytical Chemistry, Faculty of Pharmacy, Afyonkarahisar Health Sciences University, Afyonkarahisar TR-03100, Turkey
| | - Mehmet Engin Celep
- Department of Pharmacognosy, Faculty of Pharmacy, Yeditepe University, Atasehir, Istanbul TR-34755, Turkey
| | - R Süleyman Göktürk
- Department of Biology, Faculty of Science, Akdeniz University, Antalya TR-07058, Turkey
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3
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Aydemir E, Arslan İİ, Görkay AH. The Application of Electromagnetic Fields in Cancer. Adv Exp Med Biol 2024; 1450:103-120. [PMID: 37755661 DOI: 10.1007/5584_2023_788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The use of nonionizing electromagnetic fields (EMFs) has attracted interest in cancer research during the past few decades due to its noninvasive therapeutic successes in the treatment of cancer. Some epidemiological studies suggest that there may be a link between exposure to EMF and developing malignancies (such as leukemia and gliomas) or neurodegenerative diseases since EMF has a variety of biological effects such as altering reactive oxygen species (ROS)-regulated pathways. EMF exposure, however, has the potential to cause cancer cells to undergo a period of regulated cell death. Therefore, it is important to thoroughly investigate how EMF might influence cellular processes such as proliferation, differentiation, and apoptosis - processes that are targeted in cancer treatment. In this chapter, we give a thorough summary of the most recent studies on the potential use of various EMF applications with adjustable settings to treat different forms of cancer.
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Affiliation(s)
- Esra Aydemir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey.
| | - İsmail İshak Arslan
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
| | - Ahmet Hakan Görkay
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
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4
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Bülbül B, Ding K, Zhan CG, Çiftçi G, Yelekçi K, Gürboğa M, Özakpınar ÖB, Aydemir E, Baybağ D, Şahin F, Kulabaş N, Helvacıoğlu S, Charehsaz M, Tatar E, Özbey S, Küçükgüzel İ. Novel 1,2,4-triazoles derived from Ibuprofen: synthesis and in vitro evaluation of their mPGES-1 inhibitory and antiproliferative activity. Mol Divers 2023; 27:2185-2215. [PMID: 36331786 DOI: 10.1007/s11030-022-10551-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
Some novel triazole-bearing ketone and oxime derivatives were synthesized from Ibuprofen. In vitro cytotoxic activities of all synthesized molecules against five cancer lines (human breast cancer MCF-7, human lung cancer A549, human prostate cancer PC-3, human cervix cancer HeLa, and human chronic myelogenous leukemia K562 cell lines) were evaluated by MTT assay. In addition, mouse embryonic fibroblast cells (NIH/3T3) were also evaluated to determine the selectivity. Compounds 18, 36, and 45 were found to be the most cytotoxic, and their IC50 values were in the range of 17.46-68.76 µM, against the tested cancer cells. According to the results, compounds 7 and 13 demonstrated good anti-inflammatory activity against the microsomal enzyme prostaglandin E2 synthase-1 (mPGES-1) enzyme at IC50 values of 13.6 and 4.95 µM. The low cytotoxicity and non-mutagenity of these compounds were found interesting. Also, these compounds significantly prevented tube formation in angiogenesis studies. In conclusion, the anti-inflammatory and angiogenesis inhibitory activities of these compounds without toxicity suggested that they may be promising agents in anti-inflammatory treatment and they may be supportive agents for the cancer treatment.
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Affiliation(s)
- Bahadır Bülbül
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Düzce University, Konuralp, Düzce, Turkey
- Department of Pharmaceutical Chemistry, Institute of Health Sciences, Marmara University, Dragos, Kartal, 34865, Istanbul, Turkey
| | - Kai Ding
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Chang-Guo Zhan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Gamze Çiftçi
- Department of Bioinformatics and Genetics, Faculty of Engineering and Natural Sciences, Kadir Has University, Istanbul, Turkey
| | - Kemal Yelekçi
- Department of Bioinformatics and Genetics, Faculty of Engineering and Natural Sciences, Kadir Has University, Istanbul, Turkey
| | - Merve Gürboğa
- Department of Biochemistry, Faculty of Pharmacy, Marmara University, Haydarpaşa, 34668, Istanbul, Turkey
| | - Özlem Bingöl Özakpınar
- Department of Biochemistry, Faculty of Pharmacy, Marmara University, Haydarpaşa, 34668, Istanbul, Turkey
| | - Esra Aydemir
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Kayışdağı, Istanbul, Turkey
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Zeytinburnu, 34010, Turkey
| | - Deniz Baybağ
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Kayışdağı, Istanbul, Turkey
| | - Fikrettin Şahin
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Kayışdağı, Istanbul, Turkey
| | - Necla Kulabaş
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Başıbüyük, 34854, Istanbul, Turkey
| | - Sinem Helvacıoğlu
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir, 34750, Istanbul, Turkey
| | - Mohammad Charehsaz
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir, 34750, Istanbul, Turkey
| | - Esra Tatar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Başıbüyük, 34854, Istanbul, Turkey
| | - Süheyla Özbey
- Department of Physics Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - İlkay Küçükgüzel
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Başıbüyük, 34854, Istanbul, Turkey.
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Odabaş Köse E, Koyuncu Özyurt Ö, Bilmen S, Er H, Kilit C, Aydemir E. Quercetin: Synergistic Interaction with Antibiotics against Colistin-Resistant Acinetobacter baumannii. Antibiotics (Basel) 2023; 12:antibiotics12040739. [PMID: 37107101 PMCID: PMC10135113 DOI: 10.3390/antibiotics12040739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023] Open
Abstract
Infections caused by resistant strains of Acinetobacter baumannii are now a global problem that requires the immediate development of new antimicrobial drugs. Combination therapy is one of the strategies used to solve this problem. Based on this information, the purpose of this study was to determine whether quercetin (QUE), in combination with three antibiotics, is effective against colistin-resistant A. baumannii strains (ColR-Ab). The effects of the combination of QUE with colistin (COL), amikacin (AMK), and meropenem (MEM) were evaluated according to the checkerboard synergy test. The combinations of QUE + COL and QUE + AMK showed synergistic activity on ColR-Ab strains with FICI values in the range of 0.1875-0.5 and 0.1875-0.2825, respectively. A 4- to 16-fold decrease in COL MIC and a 16- to 64-fold decrease in AMK MIC values were detected. Synergistic activity was confirmed by the time-kill test, and these combinations were found to be bactericidal at the end of 24 h. According to spectrophotometric measurements, the combinations of QUE + COL and QUE + AMK induced membrane damage, leading to the leakage of nucleic acids. Cell lysis and cell death were confirmed with SEM observations. The detected synergy offers an opportunity for the future development of treatment strategies for potential infections caused by ColR-Ab strains.
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Affiliation(s)
- Elif Odabaş Köse
- Vocational School of Health Services, Akdeniz University, 07058 Antalya, Turkey
| | - Özlem Koyuncu Özyurt
- Department of Medical Microbiology, Faculty of Medicine, Akdeniz University, 07070 Antalya, Turkey
| | - Süreyya Bilmen
- Vocational School of Health Services, Akdeniz University, 07058 Antalya, Turkey
| | - Hakan Er
- Vocational School of Health Services, Akdeniz University, 07058 Antalya, Turkey
- Department of Biophysics, Faculty of Medicine, Akdeniz University, 07070, Antalya, Turkey
| | - Cansu Kilit
- Department of Biology, Faculty of Science, Akdeniz University, 07070 Antalya, Turkey
| | - Esra Aydemir
- Department of Biology, Faculty of Science, Akdeniz University, 07070 Antalya, Turkey
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Aydemir E, Tüysüz EC, Bayrak ÖF, Tecimel D, Hızlı-Deniz AA, Şahin F. Impact of silencing eEF2K expression on the malignant properties of chordoma. Mol Biol Rep 2023; 50:3011-3022. [PMID: 36652154 DOI: 10.1007/s11033-023-08257-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/06/2023] [Indexed: 01/19/2023]
Abstract
BACKGROUND Eukaryotic elongation factor 2 kinase (eukaryotic elongation factor 2 kinase, eEF2K) is a calcium calmodulin dependent protein kinase that keeps the highest energy consuming cellular process of protein synthesis under check through negative regulation. eEF2K pauses global protein synthesis rates at the translational elongation step by phosphorylating its only kown substrate elongation factor 2 (eEF2), a unique translocase activity in ekaryotic cells enabling the polypeptide chain elongation. Therefore, eEF2K is thought to preserve cellular energy pools particularly upon acute development of cellular stress conditions such as nutrient deprivation, hypoxia, or infections. Recently, high expression of this enzyme has been associated with poor prognosis in an array of solid tumor types. Therefore, in a growing number of studies tremendous effort is being directed to the development of treatment methods aiming to suppress eEF2K as a novel therapeutic approach in the fight against cancer. METHODS In our study, we aimed to investigate the changes in the tumorigenicity of chordoma cells in presence of gene silencing for eEF2K. Taking a transient gene silencing approach using siRNA particles, eEF2K gene expression was suppressed in chordoma cells. RESULTS Silencing eEF2K expression was associated with a slight increase in cellular proliferation and a decrease in death rates. Furthermore, no alteration in the sensitivity of chordoma cells to chemotherapy was detected in response to the decrease in eEF2K expression which intriguingly promoted suppression of cell migratory and invasion related properties. CONCLUSION Our findings indicate that the loss of eEF2K expression in chordoma cell lines results in the reduction of metastatic capacity.
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Affiliation(s)
- Esra Aydemir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, 10. Yil Cad, Protokol Yolu, No: 45 Topkapı, 34010, Istanbul, Turkey.
| | - Emre Can Tüysüz
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.,Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul, Turkey.,Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Ömer Faruk Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul, Turkey
| | - Didem Tecimel
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.,Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul, Turkey
| | - Ayşen Aslı Hızlı-Deniz
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey
| | - Fikrettin Şahin
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey
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Ünsal YA, Gül ÖÖ, Cander S, Ersoy C, Aydemir E, Ateş C, Uzun Z, Armağan E, Ünsal O, Ertürk E. Retrospective analysis of vitamin D status on ınflammatory markers and course of the disease in patients with COVID-19 infection. J Endocrinol Invest 2021; 44:2601-2607. [PMID: 33818731 PMCID: PMC8020370 DOI: 10.1007/s40618-021-01566-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 03/29/2021] [Indexed: 02/07/2023]
Abstract
PURPOSE The aim of the study was to investigate the association between serum 25-hydroxyvitamin D status within the last 6 months prior to COVID-19 infection and parameters of immune function and clinical outcomes. METHODS Fifty-six patients, who were admitted to the emergency clinic and diagnosed with COVID-19 infection, were included in the study. Data on clinical characteristics, inflammatory parameters and vitamin D status were recorded for each patient. All the participants had data on 25-hydroxyvitamin D status within the last 6 months prior to COVID-19 infection. RESULTS The patients were stratified as those with vitamin D status less than 20 ng/mL and higher than 20 ng/mL. A group with vitamin D status less than 20 ng/mL had lower lymphocyte counts and lower haemoglobin levels that was statistically significant (respectively; p = 0.021, p = 0.035). Higher C-reactive protein (CRP) levels were seen in the vitamin D-deficient group (p = 0.013). It was observed that vitamin D status of the patients who required oxygen therapy were lower than those who did not require oxygen therapy, not statistically significant (p = 0.05). Patients who did not use vitamin D supplementation within 6 months prior to COVID-19 infection had more likely to be diagnosed with pneumonia (p = 0.004). CONCLUSION Cases with lower vitamin D status had increased inflammatory markers and worse clinical outcomes than patients with higher vitamin D status. This study suggests that vitamin D status can be used as a prognostic factor in COVID-19 patients, and vitamin D supplementation can be recommended to improve the clinical outcomes in COVID-19 infection.
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Affiliation(s)
- Y. A. Ünsal
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - Ö. Ö. Gül
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - S. Cander
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - C. Ersoy
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - E. Aydemir
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - C. Ateş
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
| | - Z. Uzun
- Faculty of Medicine, Emergency Department, Bursa Uludag University, Bursa, Turkey
| | - E. Armağan
- Faculty of Medicine, Emergency Department, Bursa Uludag University, Bursa, Turkey
| | - O. Ünsal
- Faculty of Medicine, Oncology Department, Ankara Gazi University, Ankara, Turkey
| | - E. Ertürk
- Faculty of Medicine, Department of Endocrinology and Diseases of Metabolism, Bursa Uludag University, Bursa, Turkey
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Kasikci E, Aydemir E, Yogurtcu BM, Sahin F, Bayrak OF. Repurposing of Alexidine Dihydrochloride as an Apoptosis Initiator and Cell Cycle Inhibitor in Human Pancreatic Cancer. Anticancer Agents Med Chem 2021; 20:1956-1965. [PMID: 32384037 DOI: 10.2174/1871520620666200508085439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 12/30/2019] [Accepted: 01/27/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Highly aggressive and resistant to chemotherapy, pancreatic cancers are the fourth leading cause of cancer-related deaths in the western world. The absence of effective chemotherapeutics is leading researchers to develop novel drugs or repurpose existing chemicals. Alexidine Dihydrochloride (AD), an orally bioavailable bis-biguanide compound, is an apoptosis stimulating reagent. It induces mitochondrial damage by inhibiting a mitochondrial-specific protein tyrosine phosphatase, PTPMT1. The aim of this study was to test AD as a novel compound to induce apoptosis in a human pancreatic adenocarcinoma cell lines, Panc-1, MIA PaCa-2, AsPC-1, and Psn-1. METHODS After the IC50 value of the AD was determined by cytotoxicity assay, apoptosis was observed by a variety of methods, including the detection of early apoptosis marker Annexin V and the proteomic profile screening by apoptosis array. Multicaspase and mitochondrial depolarization were measured, and changes in the cell cycle were analyzed. RESULTS AD is found to initiate apoptosis by activating the intrinsic pathway and inhibit the cell cycle in pancreatic cancer cell lines. CONCLUSION In conclusion, considering its anti-cancer properties and bioavailability, Alexidine dihydrochloride can be considered as a potential candidate against pancreatic adenocarcinomas.
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Affiliation(s)
- Ezgi Kasikci
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul, Turkey,Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Esra Aydemir
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul, Turkey
| | - Bekir M Yogurtcu
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul, Turkey
| | - Fikrettin Sahin
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul, Turkey
| | - Omer F Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul 34718, Turkey
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9
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Affiliation(s)
- D. Narinç
- Department of Animal Science, Faculty of Agriculture, Akdeniz University, Antalya, Turkey
| | - E. Aydemir
- Department of Animal Science, Faculty of Agriculture, Akdeniz University, Antalya, Turkey
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11
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Kasikci E, Aydemir E, Yogurtcu BM, Sahin F, Bayrak OF. Abstract PO-031: Repurposing of alexidine dihydrochloride as an apoptosis-initiator and cell cycle inhibitor in human pancreatic cancer. Cancer Res 2020. [DOI: 10.1158/1538-7445.panca20-po-031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: Highly aggressive and resistant to chemotherapy, pancreatic cancers are the fourth leading cause of cancer-related deaths in the western world. The absence of effective chemotherapeutics is leading researchers to develop novel drugs or repurpose existing chemicals. Alexidine dihydrochloride (AD), an orally bioavailable bis-biguanide compound, is an apoptosis stimulating reagent. It induces mitochondrial damage by inhibiting a mitochondrial-specific protein tyrosine phosphatase, PTPMT1. The aim of this study was to test AD as a novel compound to induce apoptosis in a human pancreatic adenocarcinoma cell lines, Panc-1, MIA PaCa-2, AsPC-1, and Psn-1. Methods: After IC50 value of the AD was determined by cytotoxicity assay, apoptosis was observed by a variety of methods including the detection of early apoptosis marker Annexin V and the proteomic profile screening by apoptosis array. Multicaspase and mitochondrial depolarization were measured and changes in cell cycle were analyzed. Results: AD is found to initiate apoptosis by activating the intrinsic pathway and inhibit cell cycle in pancreatic cancer cell lines. Conclusions: As a conclusion, considering its anti-cancer properties and bioavailability, Alexidine dihydrochloride can be considered as a potential candidate against pancreatic adenocarcinomas.
Citation Format: Ezgi Kasikci, Esra Aydemir, Bekir Mustafa Yogurtcu, Fikrettin Sahin, Omer Faruk Bayrak. Repurposing of alexidine dihydrochloride as an apoptosis-initiator and cell cycle inhibitor in human pancreatic cancer [abstract]. In: Proceedings of the AACR Virtual Special Conference on Pancreatic Cancer; 2020 Sep 29-30. Philadelphia (PA): AACR; Cancer Res 2020;80(22 Suppl):Abstract nr PO-031.
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Affiliation(s)
- Ezgi Kasikci
- 1Albert Einstein College of Medicine, Bronx, NY, USA,
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Kaşıkcı E, Aydemir E, Bayrak ÖF, Şahin F. Inhibition of Migration, Invasion and Drug Resistance of Pancreatic Adenocarcinoma Cells - Role of Snail, Slug and Twist and Small Molecule Inhibitors. Onco Targets Ther 2020; 13:5763-5777. [PMID: 32606788 PMCID: PMC7308789 DOI: 10.2147/ott.s253418] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/15/2020] [Indexed: 12/12/2022] Open
Abstract
Purpose The main purpose of this study is to demonstrate the effects of epithelial to mesenchymal transition activating transcription factor silencing (EMT-ATF silencing) on migration, invasion, drug resistance and tumor-forming abilities of various pancreatic cancer cell lines. Additionally, the contribution of small molecule inhibitors of EMT (SD-208 and CX4945) to the effects of gene silencing was evaluated. Methods EMT activating transcription factors "Snail, Slug and Twist" were silenced by short hairpins on Panc-1, MIA PaCa-2, BxPC-3, and AsPC-1 pancreatic cancer cell lines. The changes in migration, invasion, laminin attachment, cancer stem-like cell properties and tumor-forming abilities were investigated. Chemosensitivity assays and small molecule inhibitors of EMT were applied to the metastatic pancreatic cancer cell line AsPC-1. Results EMT-ATF silencing reduced EMT and stem cell-like characteristics of pancreatic cancer cell lines. Following EMT-ATF silencing amongst the four PC cell lines, AsPC-1 showed the best response and was chosen for further chemoresistance and combinational therapy applications. EMT downregulated AsPC-1 cells showed less resistance to select chemotherapeutics compared to the control group. Both small molecule inhibitors enhanced the outcomes of EMT-ATF silencing. Conclusion Overall it was found that EMT-ATF silencing, either by EMT-ATF silencing or with the enhancement by small molecules, is a good candidate to treat pancreatic cancer since it simultaneously minimizes metastasis, stem cell properties, and drug resistance.
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Affiliation(s)
- Ezgi Kaşıkcı
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul 34755, Turkey.,Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Esra Aydemir
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul 34755, Turkey
| | - Ömer Faruk Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul 34718, Turkey
| | - Fikrettin Şahin
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul 34755, Turkey
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Aydemir E, Kaşikci E, Coşkunçelebi B, Bayrak ÖF, Şahin F. The effect of TWIST silencing in metastatic chordoma cells. Turk J Biol 2019; 42:279-285. [PMID: 30814891 DOI: 10.3906/biy-1801-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Chordoma is a slowly growing and invasive bone tumor with a tendency to metastasize locally in advanced stages. It is essential to discover new therapeutics that target genes involved in the metastasis of chordoma. Epithelial-mesenchymal transition (EMT) might robustly influence the metastasis of a tumor bulk. To our knowledge, this is the first time to show that EMT might have a role in chordoma metastasis. In this study, we aim to investigate the possible role of Twist, a key player transcription factor of EMT, in chordoma metastasis. The TWIST gene was silenced by short hairpins in chordoma cell line MUG-Chor1 and effects on metastasis were investigated by wound healing/gap closure and invasion assays. Twist-silenced MUG-Chor1 cells were found to be less migratory and less invasive when compared to the negative control. This study indicates that Twist might have a role in metastatic chordoma cells.
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Affiliation(s)
- Esra Aydemir
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University , İstanbul , Turkey
| | - Ezgi Kaşikci
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University , İstanbul , Turkey
| | - Burcu Coşkunçelebi
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University , İstanbul , Turkey
| | - Ömer Faruk Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital , İstanbul , Turkey
| | - Fikrettin Şahin
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University , İstanbul , Turkey
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Imir NG, Aydemir E, Şimşek E. Mechanism of the anti-angiogenic effect of Avemar on tumor cells. Oncol Lett 2017; 15:2673-2678. [PMID: 29434991 DOI: 10.3892/ol.2017.7604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 12/01/2017] [Indexed: 11/06/2022] Open
Abstract
Avemar, a derivative of fermented wheat germ extract, is a non-toxic and natural compound that is used as a dietary supplement by cancer patients undergoing chemotherapy and radiotherapy. Avemar has numerous biological activities, and several recent studies have reported that it may also have metastatic and anti-angiogenic effects. In the present study, the mechanism of the anti-angiogenic effect of Avemar on human cancer cells was investigated. The human cell lines NCI-N87 (gastric tubular adenocarcinoma), PC3 (prostate carcinoma), HeLa (endocervical adenocarcinoma) and A549 (lung adenocarcinoma) were treated with various doses (400, 800, 1,600 and 3,200 µg/ml) of Avemar, and the changes in mRNA and protein levels of two important markers of angiogenesis, vascular endothelial growth factor (VEGF) and cyclooxygenase-2 (Cox-2), were assessed by reverse transcription-quantitative polymerase chain reaction and ELISA. VEGF and Cox-2 protein and mRNA levels were significantly lower in Avemar-treated cells than in untreated cells. The data suggest that Avemar may exert an anti-angiogenic effect on cancer cells. Thus, it is suggested to medical doctors as a potential agent for the anti-angiogenic treatment of cancer.
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Affiliation(s)
- Nilüfer Gülmen Imir
- Department of Biology Education, Akdeniz University, Antalya 07058, Turkey.,Life Sciences Institute, Department of Biology, Akdeniz University, Antalya 07058, Turkey
| | - Esra Aydemir
- Department of Biology, Akdeniz University, Antalya 07058, Turkey
| | - Ece Şimşek
- Department of Nutrition and Dietetics, Antalya School of Health, Akdeniz University, Antalya 07058, Turkey
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Imir N, Aydemir E, Simsek E, Gokturk RS, Yesilada E, Fiskin K. Cytotoxic and immunomodulatory effects of Ebenus boissieri Barbey on breast cancer cells. Genet Mol Res 2016; 15:gmr7766. [PMID: 27050961 DOI: 10.4238/gmr.15017766] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We aimed to determine the cytotoxic and immunomodulatory effects of hydroalcoholic extracts of the roots and aerial parts of Ebenus boissieri (EB) on breast cancer MDA-MB231 cells and the non-cancerous human embryonic kidney cell line, 293T. Cell viability was determined by MTT assay, trypan blue exclusion, and Live/Dead Viability/Cytotoxicity assay. Apoptosis was evaluated by measuring the activity of caspase-2, 3, 6, 8, and 9. Tumor necrosis factor (TNF)-α and interferon (IFN)-g release was assayed by ELISA, and protein expression of caspase-3, TNF-a, and IFN-g was determined by western blot. The results of this study revealed that MDA-MB231 cell viability was reduced in a dose-dependent manner by the aerial and root extract of EB at 72 h with a half-maximal inhibitory concentration (IC50) of 41.1 ± 2.76 and 65 ± 1.09 μg/mL, respectively. In contrast, neither the aerial nor the root extracts of this plant inhibited the proliferation of 293T cells at doses up to 1000 μg/mL. There was a time-dependent increase in caspase activity, especially caspase-3 and caspase-9. The levels of TNF-aand IFN-g significantly increased in MDA-MB231 cells treated with aerial extract. In conclusion, the extracts of EB induced apoptosis in breast cancer cells by altering the levels of caspases, TNF-a, and IFN-g. The components and precise modes of action of EB have not yet been determined. However, potential antitumor and immunomodulatory activity was observed along with selectivity against cancer cells in vitro, suggesting that hydroalcoholic extracts of this plant are worthy of additional study.
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Affiliation(s)
- N Imir
- Department of Biology Education, Akdeniz University, Antalya, Turkey
| | - E Aydemir
- Department of Biology, Akdeniz University, Antalya, Turkey
| | - E Simsek
- Department of Nutrition and Dietetics, Akdeniz University, Antalya, Turkey
| | - R S Gokturk
- Department of Biology, Akdeniz University, Antalya, Turkey
| | | | - K Fiskin
- Department of Biology, Akdeniz University, Antalya, Turkey
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Bayrak OF, Gulluoglu S, Aydemir E, Ture U, Acar H, Atalay B, Demir Z, Sevli S, Creighton CJ, Ittmann M, Sahin F, Ozen M. MicroRNA expression profiling reveals the potential function of microRNA-31 in chordomas. J Neurooncol 2013; 115:143-51. [PMID: 23912551 DOI: 10.1007/s11060-013-1211-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 07/28/2013] [Indexed: 01/27/2023]
Abstract
Chordomas are rare bone tumors arising from remnants of the notochord. Molecular studies to determine the pathways involved in their pathogenesis and develop better treatments are limited. Alterations in microRNAs (miRNAs) play important roles in cancer. miRNAs are small RNA sequences that affect transcriptional and post-transcriptional regulation of gene expression in most eukaryotic organisms. Studies show that miRNA dysregulation is important for tumor initiation and progression. We compared the expression profile of miRNAs in chordomas to that of healthy nucleus pulposus samples to gain insight into the molecular pathogenesis of chordomas. Results of functional studies on one of the altered miRNAs, miR-31, are presented. The comparison between the miRNA profile of chordoma samples and the profile of normal nucleus pulposus samples suggests dysregulation of 53 miRNAs. Thirty miRNAs were upregulated in our tumor samples, while 23 were downregulated. Notably, hsa-miR-140-3p and hsa-miR-148a were upregulated in most chordomas relative to levels in nucleus pulposus cells. Two other miRNAs, hsa-miR-31 and hsa-miR-222, were downregulated in chordomas compared with the control group. Quantification with real-time polymerase chain reaction confirmed up or downregulation of these miRNAs among all samples. Functional analyses showed that hsa-miR-31 has an apoptotic effect on chordoma cells and downregulates the expression of c-MET and radixin. miRNA profiling showed that hsa-miR-31, hsa-miR-222, hsa-miR-140-3p and hsa-miR-148a are differentially expressed in chordomas compared with healthy nucleus pulposus. Our profiling may be the first step toward delineating the differential regulation of cancer-related genes in chordomas, helping to reveal the mechanisms of initiation and progression.
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Affiliation(s)
- Omer Faruk Bayrak
- Department of Medical Genetics, Yeditepe University Medical School and Yeditepe University Hospital, Istanbul, Turkey
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Aysan E, Bayrak OF, Aydemir E, Telci D, Sahin F, Yardimci C, Muslumanoglu M. Cancer Preventive Effects of Whole Cell Type Immunization against Mice Ehrlich Tumors. Asian Pac J Cancer Prev 2013; 14:3515-9. [DOI: 10.7314/apjcp.2013.14.6.3515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Bayrak OF, Gulluoglu S, Aydemir E. Response. Chordoma. J Neurosurg Spine 2013; 18:534. [PMID: 23776939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Raimann JG, Gotch F, Keen M, Kotanko P, Levin NW, Pierratos A, Lindsay R, Severova-Andreevska G, Trajceska L, Gelev S, Selim G, Sikole A, Yoon SY, Hwang SD, Cho DK, Cho YH, Moon SJ, Ribitsch W, Schreiner PJ, Uhlmann M, Schilcher G, Stadlbauer V, Horina JH, Rosenkranz AR, Schneditz D, Kiss I, Kerkovits L, Ambrus C, Kulcsar I, Szegedi J, Benke A, Borbas B, Ferenczi S, Hengsperger M, Kazup S, Nagy L, Nemeth J, Rozinka A, Szabo T, Szelestei T, Toth E, Varga G, Wagner G, Zakar G, Gergely L, Tisler A, Kiss Z, Sasaki S, Miyamato M, Nomura A, Koitabashi K, Nishiwaki H, Suzuki T, Uchida D, Kawarazaki H, Shibagaki Y, Kimura K, Libetta C, Martinelli C, Margiotta E, Borettaz I, Canevari M, Esposito P, Sepe V, Dal Canton A, Pateinakis P, Dimitriadis C, Papagianni A, Douma S, Efstratiadis G, Memmos D, Nelson CL, Dunstan PJ, Zwiech R, Hasuike Y, Yanase K, Hamahata S, Nagai T, Yahiro M, Kaibe S, Kida A, Nagasawa Y, Kuragano T, Nakanishi T, Kim JS, Yang JW, Choi SO, Han BG, Chang JH, Kim AJ, Kim HS, Ro H, Jung JY, Lee HH, Chung W, Tanaka H, Kita T, Okamoto K, Mikami M, Sakai R, Libetta C, Canevari M, Martinelli C, Borettaz I, Margiotta E, Lojacono E, Votta B, Rampino T, Gregorini M, Amore A, Coppo R, Dal Canton A, ElSharkawy MMS, Kamel M, Elhamamsy M, Allam S, Ryu JH, Lee S, Hong SC, Kim SJ, Kang DH, Ryu DR, Choi KB, Kiraz T, Yalcin A, Akay M, Sahin G, Musmul A, Chang JH, Ro H, Jung JY, Lee HH, Chung W, Kamijo Y, Horiuchi H, Iida H, Saito K, Furutera R, Ishibashi Y, Sidiropoulou M, Patsialas S, Angelopoulos M, Torreggiani M, Serpieri N, Arazzi M, Esposito V, Calatroni M, La Porta E, Catucci D, Montagna G, Semeraro L, Efficace E, Piazza V, Picardi L, Villa G, Esposito C, Kim JC, Hwang E, Park K, Karakizlis H, Bohl K, Kortus-Goetze B, Dodel R, Hoyer J, Cinar A, Kazancioglu R, Isik AT, Aydemir E, Gorcin B, Radic J, Ljutic D, Radic M, Kovacic V, Sain M, Dodig Curkovic K, Grzegorzewska AE, Niepolski L, Sikora J, Jagodzinski P, Sowinska A, Sirolli V, Rossi C, Di Castelnuovo A, Felaco P, Amoroso L, Zucchelli M, Ciavardelli D, Sacchetta P, Urbani A, Arduini A, Bonomini M, Inoue T, Okano K, Tsuruta Y, Tsuruta Y, Tsuchiya K, Akiba T, Nitta K, Grzegorzewska AE, Pajzderski D, Sowinska A, Jagodzinski P. Pathophysiology and clinical studies in CKD 5D. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Bayrak ÖF, Gulluoglu S, Aydemir E, Türe U. Response. J Neurosurg 2013; 118:914. [PMID: 23667924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Aydemir E, Bayrak OF, Sahin F, Atalay B, Kose GT, Ozen M, Sevli S, Dalan AB, Yalvac ME, Dogruluk T, Türe U. Characterization of cancer stem-like cells in chordoma. J Neurosurg 2012; 116:810-20. [PMID: 22283189 DOI: 10.3171/2011.12.jns11430] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECT Chordomas are locally aggressive bone tumors known to arise from the remnants of the notochord. Because chordomas are rare, molecular studies aimed at developing new therapies are scarce and new approaches are needed. Chordoma cells and cancer stem-like cells share similar characteristics, including self-renewal, differentiation, and resistance to chemotherapy. Therefore, it seems possible that chordomas might contain a subpopulation of cancer stem-like cells. The aim of this study is to determine whether cancer stem-like cells might be present in chordomas. METHODS In this study, the authors used gene expression analysis for common cancer stem-like cellmarkers, including c-myc, SSEA-1, oct4, klf4, sox2, nanog, and brachyury, and compared chordoma cells and tissues with nucleus pulposus tissues (disc degenerated nontumorigenic tissues). Differentiation through agents such as all-trans retinoic acid and osteogenic differentiation medium was induced to the chordoma cells. Additionally, U-CH1 cells were sorted via magnetic cell sorting for stem cell markers CD133 and CD15. After separation, positive and negative cells for these markers were grown in a nonadherent environment, soft agar, to determine whether the presence of these cancer stem-like cells might be responsible for initiating chordoma. The results were compared with those of untreated cells in terms of migration, proliferation, and gene expression by using reverse transcriptase polymerase chain reaction. RESULTS The results indicate that chordoma cells might be differentiating and committing into an osteogenic lineage when induced with the osteogenic differentiation agent. Chordoma cells that are induced with retinoic acid showed slower migration and proliferation rates when compared with the untreated cells. Chordoma cells that were found to be enriched by cancer stem-like cell markers, namely CD133 and CD15, were able to live in a nonadherent soft agar medium, demonstrating a self-renewal capability. To the authors' knowledge, this is the first time that cancer stem-like cell markers were also found to be expressed in chordoma cells and tissues. CONCLUSIONS Cancer stem-like cell detection might be an important step in determining the recurrent and metastatic characteristics of chordoma. This finding may lead to the development of new approaches toward treatments of chordomas.
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Affiliation(s)
- Esra Aydemir
- Department of Genetics and Bioengineering, Yeditepe University, Istanbul, Turkey
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Oz ES, Aydemir E, Fışkın K. DMSO exhibits similar cytotoxicity effects to thalidomide in mouse breast cancer cells. Oncol Lett 2012; 3:927-929. [PMID: 22741020 DOI: 10.3892/ol.2012.559] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 11/03/2011] [Indexed: 01/02/2023] Open
Abstract
The purpose of this study was to evaluate the cytotoxic effect of thalidomide on 4T1 and 4THMpc mouse breast cancer cell lines. Mouse breast cancer cells (4T1) and cells derived from metastatic lesions (4THMpc) were treated with various doses of thalidomide [10(-2)-100 µM dissolved in dimethyl sulfoxide (DMSO) as recommended] and 1.4 µM DMSO (maximum DMSO concentration in the highest thalidomide dose) as a DMSO control against the untreated control groups. MTT was used to evaluate the cytotoxic effects of the treatments. Therefore, we investigated the role of thalidomide on apoptosis. A fluorometric EnzChek caspase-3 enzyme activity assay kit was used to evaluate the apoptotic effects of thalidomide. Thalidomide dissolved in DMSO exhibited cytotoxic effects on 4T1 and 4THMpc cells compared to the control groups incubated without any supplement. Treatment with thalidomide resulted in apoptosis of mouse breast cancer cells in a time- and dose-dependent manner as demonstrated by caspase-3 enzyme activity. However, DMSO alone suppressed cell proliferation more effectively than thalidomide. In cultured mouse breast cancer cells the inhibitory effect of thalidomide may be partially attributed to the solvent DMSO alone.
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Affiliation(s)
- Ece Simsek Oz
- Department of Biology, Art and Science Faculty, Akdeniz University, Antalya 07058, Turkey
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Oz E, Aydemir E, Korcum AF, Fiskin K. The effects of substance P fragments on breast cancer cells. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.27_suppl.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
295 Background: Substance P (SP), a neuropeptide, is known to induce tumor cell proliferation. In contrast with intact peptide, the fragments of SP are suggested to inhibit the growth of various cancer cells. The aim of the present study was to determine cytotoxic effects of physiological fragments of SP either alone or in combination with radiotherapy on mouse breast cancer cells. Methods: In this study, we tested the physiological fragments of SP such as SP (4-11), SP (6-11) and SP (1-7). Dose-response and time-course studies were carried out with various concentrations (100-0.001 nM) of SP fragments and the intact peptide. 4T1 mouse breast cancer cell lines were used in this study. The cytotoxic effect of SP fragments alone or in combination with radiotherapy was determined via WST-1 assay. Changes in substance P amounts in cells and in mediums determined by SP EIA kit. Results: SP(4-11) and SP(6-11), but not SP(1-7), inhibited the proliferation of breast cancer cells and potentiated antitumor effects of radiotherapy. Moreover, the intact peptide alone did not alter the proliferation rate of 4T1 cells and the cytotoxic effects of the fragments were not inhibited by SP. Conclusions: These results demonstrate that combined treatment with 2 fragments of SP (4-11 and 6-11) and radiotherapy induce cytotoxic effects. These data may provide the basis for a strategy, in which it is possible to use SP fragments and radiotherapy together to improve the efficiency of the independent therapies.
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Affiliation(s)
- E. Oz
- Faculty of Biology, Akdeniz University, Antalya, Turkey; School of Medicine, Akdeniz University, Antalya, Turkey
| | - E. Aydemir
- Faculty of Biology, Akdeniz University, Antalya, Turkey; School of Medicine, Akdeniz University, Antalya, Turkey
| | - A. F. Korcum
- Faculty of Biology, Akdeniz University, Antalya, Turkey; School of Medicine, Akdeniz University, Antalya, Turkey
| | - K. Fiskin
- Faculty of Biology, Akdeniz University, Antalya, Turkey; School of Medicine, Akdeniz University, Antalya, Turkey
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Bayrak OF, Aydemir E, Gulluoglu S, Sahin F, Sevli S, Yalvac ME, Acar H, Ozen M. The effects of chemotherapeutic agents on differentiated chordoma cells. J Neurosurg Spine 2011; 15:620-4. [PMID: 21905773 DOI: 10.3171/2011.7.spine10798] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Chordoma is a rare type of malignant bone tumor and is known to arise from the remnants of the notochord. Resistance to chemotherapy makes the treatment of chordoma difficult; therefore, new approaches need to be developed to cure this disease. Differentiation therapy, using various differentiating agents, is attracting oncologists as a common therapeutic method to treat other tumors. Based on forcing cells to mature into other lineages, differentiation therapy might be an available method to treat chordomas in addition to conventional therapies. METHODS In this study a chordoma cell line, U-CH1, was exposed to several chemotherapeutic agents including vincristine, doxorubicin, cisplatin, etoposide, fludarabine, methotrexate, nilotinib, and imatinib mesylate under appropriate conditions. The first group of U-CH1 cells was exposed to drugs only and the second group of cells was exposed to the simultaneous treatment of 1 μM all-trans retinoic acid (ATRA) and chemotherapeutic agents in differentiation therapy. The efficacy of the differentiation method was assessed by measuring the viability of U-CH1 cells. RESULTS Vincristine, doxorubicin, etoposide, cisplatin, and fludarabine, each at a concentration of 10 μM, decreased the number of chordoma cells when given alone down to 11%, 0%, 30%, 67%, and 3%, respectively. Etoposide and cisplatin, each at a concentration of 10 μM, reduced the percentage of viable chordoma cells in a more effective way when given with 1 μM ATRA simultaneously, reducing the number of viable cells to 14% and 9%, respectively. On the other hand, imatinib and nilotinib, each at a concentration of 3 μM, as well as 10 μM methotrexate, showed no decrease in the number of cancer cells. CONCLUSIONS The results suggest that chordoma cells may be treated using the differentiation method in a more effective way than when they are treated with chemotherapeutic agents alone. This new approach may be an alternative method to conventional therapies in the treatment of chordoma.
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Affiliation(s)
- Omer Faruk Bayrak
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul.
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Oz E, Aydemir E, Korcum AF, Fiskin K. The effects of substance P fragments on breast cancer cells. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Oz EŞ, Aydemir E, Korcum AF, Fiskin K. Thalidomide and irradiation combination therapy increases substance P levels in vitro. Exp Ther Med 2011; 2:529-535. [PMID: 22977536 DOI: 10.3892/etm.2011.216] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 02/04/2011] [Indexed: 12/30/2022] Open
Abstract
Thalidomide is an anti-angiogenic agent that is used in the treatment of cancer. However, in many cases, particularly in patients with breast cancer, thalidomide treatment alone is insufficient and must be combined with other drugs or therapies. In the clinical setting, thalidomide is most commonly used in combination with radiation therapy. However, the exact mechanisms of its effect are unkown. Radiotherapy alters the expression of substance P, which is considered a crucial pro-angiogenic peptide. To determine whether thalidomide and radiotherapy in combination overcome the limitations of each as monotherapy, we examined the effects of the combination on the growth of breast cancer cells as well as on the expression of substance P in vitro. Mouse breast cancer cells (4T1) and cells produced from metastatic lesions (4THMpc) were treated with radiotherapy (RT) (45 Gy) alone, thalidomide (Thal) (40 μg/ml) alone or combination therapy (40 μg/ml Thal + 45 Gy RT), and compared with control cells. MTS, Live/Dead and trypan blue exclusion assays were used to evaluate the cytotoxic effects of the treatments. The levels of substance P in the conditioned media and in the cell lysates were determined by a substance P ELISA kit, and changes in the protein content were analyzed by Western blotting. Thalidomide alone resulted in a significant inhibition in the growth of the 4T1 (34.1%) and 4THMpc (52.6%) cell lines. RT alone inhibited the growth of the 4T1 (19.2%) and 4THMpc (23.31%) cell lines. The combination therapy enhanced the growth inhibition noted in the 4T1 (47.9%) and 4THMpc (62.03%) cell lines. The expression of substance P in the conditioned media and in the cell lysates increased within 72 h of RT. This increase was significantly enhanced with the combination therapy. These data indicate that thalidomide inhibits breast cancer cell growth and potentiates the anti-tumor effects of radiation at appropriate doses.
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Aydemir E, Breward CJW, Witelski TP. The Effect of Polar Lipids on Tear Film Dynamics. Bull Math Biol 2010; 73:1171-201. [DOI: 10.1007/s11538-010-9555-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Accepted: 05/27/2010] [Indexed: 11/28/2022]
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Bayrak OF, Aydemir E, Sahin F. Retinoic acid induced chordomas as a model of differential therapy. Saudi Med J 2009; 30:1236-1237. [PMID: 19750276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Affiliation(s)
- Omer F Bayrak
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul 34752, Turkey.
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Aydemir E, Çil B, Peynircioglu B, Balkanci F. Abstract No. 254: Venous Port Implantation on the Trapezius Muscle. J Vasc Interv Radiol 2009. [DOI: 10.1016/j.jvir.2008.12.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Demirkesen C, Ertürk G, Kaner G, Aydemir E. Acquired smooth muscle hamartoma. J Eur Acad Dermatol Venereol 2006. [DOI: 10.1111/j.1468-3083.1997.tb00271.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Cam H, Taytan Y, Aji DY, Bilgi Z, Aydemir E, Demirkesen C. Congenital syphilis presenting with nephrotic syndrome and leucocytoclastic vasculitis. J Eur Acad Dermatol Venereol 2004; 18:484-6. [PMID: 15196169 DOI: 10.1111/j.1468-3083.2004.00933.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nephrotic syndrome is a well-recognized entity in congenital syphilis but leucocytoclastic vasculitis has not yet been described. We report a case of nephrotic syndrome and leucocytoclastic vasculitis associated with congenital syphilis in a 45-day-old male infant who did well after treatment with intravenous penicillin.
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Affiliation(s)
- H Cam
- Department of Paediatrics, Istanbul University, Cerrahpara Medical Faculty, 34303 Istanbul, Turkey.
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Goksugur N, Ozaras R, Tahan V, Mert A, Soysal T, Aydemir E, Tabak F. Toxic shock syndrome due toStaphylococcus aureussepsis following diagnostic laparotomy for Hodgkin's disease. J Eur Acad Dermatol Venereol 2003; 17:732-3. [PMID: 14761154 DOI: 10.1046/j.1468-3083.2003.00890.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Affiliation(s)
- A Z Isik
- Division of Gynecology, Zekai Tahir Burak Women's Hospital, Ankara, Turkey
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