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Azimi M, Cho S, Bozkurt E, McDonough E, Kisakol B, Matveeva A, Salvucci M, Dussmann H, McDade S, Firat C, Urganci N, Shia J, Longley DB, Ginty F, Prehn JHM. Spatial Effects of Infiltrating T cells on Neighbouring Cancer Cells and Prognosis in Stage III CRC patients. bioRxiv 2024:2024.01.30.577720. [PMID: 38352309 PMCID: PMC10862776 DOI: 10.1101/2024.01.30.577720] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Colorectal cancer (CRC) is one of the most frequently occurring cancers, but prognostic biomarkers identifying patients at risk of recurrence are still lacking. In this study, we aimed to investigate in more detail the spatial relationship between intratumoural T cells, cancer cells, and cancer cell hallmarks, as prognostic biomarkers in stage III colorectal cancer patients. We conducted multiplexed imaging of 56 protein markers at single cell resolution on resected fixed tissue from stage III CRC patients who received adjuvant 5-fluorouracil-based chemotherapy. Images underwent segmentation for tumour, stroma and immune cells, and cancer cell 'state' protein marker expression was quantified at a cellular level. We developed a Python package for estimation of spatial proximity, nearest neighbour analysis focusing on cancer cell - T cell interactions at single-cell level. In our discovery cohort (MSK), we processed 462 core samples (total number of cells: 1,669,228) from 221 adjuvant 5FU-treated stage III patients. The validation cohort (HV) consisted of 272 samples (total number of cells: 853,398) from 98 stage III CRC patients. While there were trends for an association between percentage of cytotoxic T cells (across the whole cancer core), it did not reach significance (Discovery cohort: p = 0.07, Validation cohort: p = 0.19). We next utilized our region-based nearest neighbourhood approach to determine the spatial relationships between cytotoxic T cells, helper T cells and cancer cell clusters. In the both cohorts, we found that lower distance between cytotoxic T cells, T helper cells and cancer cells was significantly associated with increased disease-free survival. An unsupervised trained model that clustered patients based on the median distance between immune cells and cancer cells, as well as protein expression profiles, successfully classified patients into low-risk and high-risk groups (Discovery cohort: p = 0.01, Validation cohort: p = 0.003).
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Affiliation(s)
- Mohammadreza Azimi
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Sanghee Cho
- GE HealthCare Technology and Innovation Center, Niskayuna, NY, 12309, USA (formerly GE Research Center)
| | - Emir Bozkurt
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Elizabeth McDonough
- GE HealthCare Technology and Innovation Center, Niskayuna, NY, 12309, USA (formerly GE Research Center)
| | - Batuhan Kisakol
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Anna Matveeva
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Manuela Salvucci
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Heiko Dussmann
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Simon McDade
- School of Medicine, Dentistry and Biomedical Sciences, Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK
| | | | | | - Jinru Shia
- Memorial Sloan Kettering Cancer Centre, NY
| | - Daniel B Longley
- School of Medicine, Dentistry and Biomedical Sciences, Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK
| | - Fiona Ginty
- GE HealthCare Technology and Innovation Center, Niskayuna, NY, 12309, USA (formerly GE Research Center)
| | - Jochen H M Prehn
- Department of Physiology and Medical Physics, RCSI Centre for Systems Medicine, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin 2, Ireland
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2
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Sari A, Dural IE, Aksu U, Korucu C, Bozkurt E, Apaydin M. Evaluation of Tp-E interval and Tp-E/Qtc ratios in patients with overt hypothyroidism and subclinical hypothyroidism. Eur Rev Med Pharmacol Sci 2023; 27:6176-6181. [PMID: 37458674 DOI: 10.26355/eurrev_202307_32974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
OBJECTIVE Tp-e interval and Tp-e/QTc are among the new-generation indicators used for predicting cardiac arrhythmia and ventricular repolarization. In this study, we aimed to evaluate Tp-e and Tp-e/QTc ratios in patients with overt hypothyroidism and subclinical hypothyroid patients. PATIENTS AND METHODS In this study, a total of 105 patients were included with 35 overt hypothyroidism, 35 subclinical hypothyroidism, and 35 healthy euthyroid patients. The anthropometric measurements, laboratory results, and electrocardiographic data of the patients were measured. The groups were compared in terms of Tp-e interval, Tp-e/QT and Tp-e QT/c ratios. RESULTS When the Tp-e interval and Tp-e/QTc values of the patients were compared, a significant difference was found (p<0.001). A positive correlation was found between thyroid stimulating hormone (TSH) with Tp-e interval and Tp-e/QT ratio. CONCLUSIONS Tp-e interval and Tp-e/QTc duration increased in overt hypothyroidism and subclinical hypothyroidism patients compared to euthyroid patients. We believe that regular use of levothyroxine therapy in overt hypothyroidism patients will decrease cardiac mortality. Cardiac risk factors should be considered to decide on levothyroxine therapy for subclinical hypothyroidism patients.
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Affiliation(s)
- A Sari
- Department of Internal Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey.
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Tarhane S, Bozkurt E, Büyük F. Investigation of Salmonella spp. and Escherichia coli in the Snake-eyed lizard ( Ophisops elegans) (Sauria, Lacertidae) in the Çankırı Province of Turkey. Pol J Vet Sci 2023; 26:83-90. [PMID: 36961273 DOI: 10.24425/pjvs.2023.145009] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Zoonoses are frequently associated with wild animals. Research on reptiles either living in their natural habitat or kept as pet animals has shown that these animals frequently serve as the asymptomatic hosts of bacterial zoonotic agents, including Salmonella spp. and Escherichia coli. Studies have shown the potential of reptiles to transmit these pathogens to humans and other animals. Epidemiological research on the herpetofauna of various regions has demonstrated the high potential of reptiles as a reservoir of Salmonella spp. In the present study, Salmonella spp. were not isolated or identified from the snake-eyed lizard. Out of 150 cloacal swab samples of snake-eyed lizard 25 (16.7%) E. coli were isolated and out of these 4 (2.7%) were identified to be E. coli O157:H7 by PCR. The results suggest that Ophisops elegans could be involved in the transmission of E. coli, rather than Salmonella spp. This study demonstrates for the first time that the snake-eyed lizard acts as a cloacal carrier of E. coli O157:H7 and presents data that may aid in preventing the transmission of this strain to humans.
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Affiliation(s)
- S Tarhane
- Veterinary Department, Eldivan Vocational School of Health Services, Çankırı Karatekin University, 18100, Çankırı, Turkey
| | - E Bozkurt
- Veterinary Department, Eldivan Vocational School of Health Services, Çankırı Karatekin University, 18100, Çankırı, Turkey
| | - F Büyük
- Department of Microbiology, Faculty of Veterinary Medicine, Kafkas University, 36100, Kars, Turkey
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Bozkurt E, Düssmann H, Prehn JHM. Fluorescence Time-lapse Imaging of Entosis Using Tetramethylrhodamine Methyl Ester Staining. Bio Protoc 2022; 12:4564. [PMID: 36620081 PMCID: PMC9794836 DOI: 10.21769/bioprotoc.4564] [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: 08/09/2022] [Revised: 09/25/2022] [Accepted: 10/19/2022] [Indexed: 12/07/2022] Open
Abstract
Entosis is a process where a living cell launches an invasion into another living cell's cytoplasm. These inner cells can survive inside outer cells for a long period of time, can undergo cell division, or can be released. However, the fate of most inner cells is lysosomal degradation by entotic cell death. Entosis can be detected by imaging a combination of membrane, cytoplasmic, nuclear, and lysosomal staining in the cells. Here, we provide a protocol for detecting entosis events and measuring the kinetics of entotic cell death by time-lapse imaging using tetramethylrhodamine methyl ester (TMRM) staining. This protocol was validated in: J Cell Biol (2021), DOI: 10.1083/jcb.202010030.
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Affiliation(s)
- Emir Bozkurt
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Heiko Düssmann
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Jochen H. M. Prehn
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
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*For correspondence:
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Bozkurt E, Düssmann H, Salvucci M, Cavanagh BL, Van Schaeybroeck S, Longley DB, Martin SJ, Prehn JHM. TRAIL signaling promotes entosis in colorectal cancer. J Cell Biol 2021; 220:212649. [PMID: 34546352 PMCID: PMC8563286 DOI: 10.1083/jcb.202010030] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 07/14/2021] [Accepted: 08/31/2021] [Indexed: 11/22/2022] Open
Abstract
Entosis is a form of nonphagocytic cell-in-cell (CIC) interaction where a living cell enters into another. Tumors show evidence of entosis; however, factors controlling entosis remain to be elucidated. Here, we find that besides inducing apoptosis, TRAIL signaling is a potent activator of entosis in colon cancer cells. Initiation of both apoptosis and entosis requires TRAIL receptors DR4 and DR5; however, induction of apoptosis and entosis diverges at caspase-8 as its structural presence is sufficient for induction of entosis but not apoptosis. Although apoptosis and entosis are morphologically and biochemically distinct, knockout of Bax and Bak, or inhibition of caspases, also inhibits entotic cell death and promotes survival and release of inner cells. Analysis of colorectal cancer tumors reveals a significant association between TRAIL signaling and CIC structures. Finally, the presence of CIC structures in the invasive front regions of colorectal tumors shows a strong correlation with adverse patient prognosis.
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Affiliation(s)
- Emir Bozkurt
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.,Department of Genetics and Bioengineering, Faculty of Engineering, Izmir University of Economics, Balcova, Izmir, Turkey
| | - Heiko Düssmann
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Manuela Salvucci
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Brenton L Cavanagh
- Cellular and Molecular Imaging Core, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Sandra Van Schaeybroeck
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, UK
| | - Daniel B Longley
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, UK
| | - Seamus J Martin
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College, Dublin, Ireland
| | - Jochen H M Prehn
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
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Sabaner MC, Duman R, Dogan M, Akdogan M, Vurmaz A, Bozkurt E, Beysel S. Do SGLT2 inhibitors prevent preclinical diabetic retinopathy? A Prospective Pilot Optical Coherence Tomography Angiography Study. J Fr Ophtalmol 2021; 44:1159-1167. [PMID: 34244004 DOI: 10.1016/j.jfo.2021.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 11/20/2020] [Accepted: 01/04/2021] [Indexed: 01/10/2023]
Abstract
PURPOSE To evaluate the effects of metformin alone and combined treatment with metformin and an SGLT2 inhibitor on retinal microvascular morphology using optical coherence tomography angiography (OCTA) in isolated type 2 diabetes mellitus (DM) patients with HbA1c above the expected target (>7%). METHODS Fifty patients with isolated DM, 7%<HbA1c<8%, without diabetic retinopathy (DR) using 500mg metformin ×2 for glycemic control were included in the study. OCTA and BMI measurements were obtained at the first evaluation. Treatment was changed to metformin 1000mg ×2. Patients who did not develop side effects due to the metformin were defined as the metformin-tolerant group (group-1). Patients who developed side effects were defined as the metformin-intolerant group (group-2), and their treatment was changed to metformin 500mg ×2 and empagliflozin 10mg. The second evaluation was performed three months after the last treatment change. RESULTS HbA1c was lower on the second evaluation in both groups (P<0.001, in both). On the second evaluation in group-1, a decrease was found in superficial perifoveal and deep parafoveal macular vascular plexus densities (P: 0.040 and P: 0.020, respectively). No statistically significant difference was observed in group-2. CONCLUSION SGLT2 inhibitors may contribute to preventing the development of preclinical DR. In patients with metformin intolerance, adding SGLT2 inhibitors may be a reasonable choice to protect the retina.
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Affiliation(s)
- M C Sabaner
- Samsun Bafra State Hospital, Department of Ophthalmology, Samsun, Turkey.
| | - R Duman
- Bakircay University Cigli Training and Research Hospital, Department of Ophthalmology, Izmir, Turkey
| | - M Dogan
- Afyonkarahisar Health Sciences University, Faculty of Medicine, Department of Ophthalmology, Afyonkarahisar, Turkey
| | - M Akdogan
- Afyonkarahisar Health Sciences University, Faculty of Medicine, Department of Ophthalmology, Afyonkarahisar, Turkey
| | - A Vurmaz
- Afyonkarahisar Health Sciences University, Faculty of Medicine, Department of Biochemistry, Afyonkarahisar, Turkey
| | - E Bozkurt
- Afyonkarahisar Health Sciences University, Faculty of Medicine, Department of Internal Medicine, Afyonkarahisar, Turkey
| | - S Beysel
- Afyonkarahisar Health Sciences University, Faculty of Medicine, Department of Endocrinology and Metabolism, Afyonkarahisar, Turkey
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7
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Oner E, Kotmakci M, Baird AM, Gray SG, Debelec Butuner B, Bozkurt E, Kantarci AG, Finn SP. Development of EphA2 siRNA-loaded lipid nanoparticles and combination with a small-molecule histone demethylase inhibitor in prostate cancer cells and tumor spheroids. J Nanobiotechnology 2021; 19:71. [PMID: 33685469 PMCID: PMC7938557 DOI: 10.1186/s12951-021-00781-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 09/29/2020] [Accepted: 01/22/2021] [Indexed: 12/09/2022] Open
Abstract
BACKGROUND siRNAs hold a great potential for cancer therapy, however, poor stability in body fluids and low cellular uptake limit their use in the clinic. To enhance the bioavailability of siRNAs in tumors, novel, safe, and effective carriers are needed. RESULTS Here, we developed cationic solid lipid nanoparticles (cSLNs) to carry siRNAs targeting EphA2 receptor tyrosine kinase (siEphA2), which is overexpressed in many solid tumors including prostate cancer. Using DDAB cationic lipid instead of DOTMA reduced nanoparticle size and enhanced both cellular uptake and gene silencing in prostate cancer cells. DDAB-cSLN showed better cellular uptake efficiency with similar silencing compared to commercial transfection reagent (Dharmafect 2). After verifying the efficacy of siEphA2-loaded nanoparticles, we further evaluated a potential combination with a histone lysine demethylase inhibitor, JIB-04. Silencing EphA2 by siEphA2-loaded DDAB-cSLN did not affect the viability (2D or 3D culture), migration, nor clonogenicity of PC-3 cells alone. However, upon co-administration with JIB-04, there was a decrease in cellular responses. Furthermore, JIB-04 decreased EphA2 expression, and thus, silencing by siEphA2-loaded nanoparticles was further increased with co-treatment. CONCLUSIONS We have successfully developed a novel siRNA-loaded lipid nanoparticle for targeting EphA2. Moreover, preliminary results of the effects of JIB-04, alone and in combination with siEphA2, on prostate cancer cells and prostate cancer tumor spheroids were presented for the first time. Our delivery system provides high transfection efficiency and shows great promise for targeting other genes and cancer types in further in vitro and in vivo studies.
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Affiliation(s)
- Ezgi Oner
- Department of Histopathology and Morbid Anatomy, Sir Patrick Dun Translational Research Lab, St. James's Hospital, Dublin, Ireland.,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey.,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Izmir Katip Celebi University, Balatcik, Izmir, Turkey
| | - Mustafa Kotmakci
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey
| | - Anne-Marie Baird
- Department of Histopathology and Morbid Anatomy, Sir Patrick Dun Translational Research Lab, St. James's Hospital, Dublin, Ireland.,Thoracic Oncology Research Group, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland.,Department of Clinical Medicine, Trinity College Dublin, Dublin, Ireland
| | - Steven G Gray
- Thoracic Oncology Research Group, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland.,Department of Clinical Medicine, Trinity College Dublin, Dublin, Ireland
| | - Bilge Debelec Butuner
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey
| | - Emir Bozkurt
- Department of Genetics and Bioengineering, Faculty of Engineering, Izmir University of Economics, Balcova, Izmir, Turkey
| | - Ayse Gulten Kantarci
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey
| | - Stephen P Finn
- Department of Histopathology and Morbid Anatomy, Sir Patrick Dun Translational Research Lab, St. James's Hospital, Dublin, Ireland. .,Thoracic Oncology Research Group, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland. .,Department of Histopathology, Labmed Directorate, St. James's Hospital, Dublin, Ireland. .,Cancer Molecular Diagnostics, Labmed Directorate, St. James's Hospital, Dublin, Ireland.
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Fichtner M, Bozkurt E, Salvucci M, McCann C, McAllister KA, Halang L, Düssmann H, Kinsella S, Crawford N, Sessler T, Longley DB, Prehn JHM. Molecular subtype-specific responses of colon cancer cells to the SMAC mimetic Birinapant. Cell Death Dis 2020; 11:1020. [PMID: 33257690 PMCID: PMC7705699 DOI: 10.1038/s41419-020-03232-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 11/07/2020] [Accepted: 11/10/2020] [Indexed: 12/24/2022]
Abstract
Colorectal cancer is a molecularly heterogeneous disease. Responses to genotoxic chemotherapy in the adjuvant or palliative setting vary greatly between patients, and colorectal cancer cells often resist chemotherapy by evading apoptosis. Antagonists of an inhibitor of apoptosis proteins (IAPs) can restore defective apoptosis signaling by degrading cIAP1 and cIAP2 proteins and by inhibition of XIAP. Due to the multiple molecular mechanisms-of-action of these targets, responses to IAP antagonist may differ between molecularly distinct colon cancer cells. In this study, responses to the IAP antagonist Birinapant and oxaliplatin/5-fluorouracil (5-FU) were investigated in 14 colon cancer cell lines, representing the consensus molecular subtypes (CMS). Treatment with Birinapant alone did not result in a substantial increase in apoptotic cells in this cell line panel. Annexin-V/PI assays quantified by flow cytometry and high-content screening showed that Birinapant increased responses of CMS1 and partially CMS3 cell lines to oxaliplatin/5-FU, whereas CMS2 cells were not effectively sensitized. FRET-based imaging of caspase-8 and -3 activation validated these differences at the single-cell level, with CMS1 cells displaying sustained activation of caspase-8-like activity during Birinapant and oxaliplatin/5-FU co-treatment, ultimately activating the intrinsic mitochondrial apoptosis pathway. In CMS2 cell lines, Birinapant exhibited synergistic effects in combination with TNFα, suggesting that Birinapant can restore extrinsic apoptosis signaling in the context of inflammatory signals in this subtype. To explore this further, we co-cultured CMS2 and CMS1 colon cancer cells with peripheral blood mononuclear cells. We observed increased cell death during Birinapant single treatment in these co-cultures, which was abrogated by anti-TNFα-neutralizing antibodies. Collectively, our study demonstrates that IAP inhibition is a promising modulator of response to oxaliplatin/5-FU in colorectal cancers of the CMS1 subtype, and may show promise as in the CMS2 subtype, suggesting that molecular subtyping may aid as a patient stratification tool for IAP antagonists in this disease.
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Affiliation(s)
- Michael Fichtner
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Emir Bozkurt
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.,Department of Genetics and Bioengineering, Faculty of Engineering, Izmir University of Economics, Balcova, Izmir, Turkey
| | - Manuela Salvucci
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Christopher McCann
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | | | - Luise Halang
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Heiko Düssmann
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Sinéad Kinsella
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.,Program in Immunology, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Nyree Crawford
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Tamas Sessler
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Daniel B Longley
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Jochen H M Prehn
- Department of Physiology and Medical Physics, Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.
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Bozkurt E, Sıcak Y, Oruç-Emre EE, Iyidoğan AK, Öztürk M. Design and Bioevaluation of Novel Hydrazide-Hydrazones Derived from 4-Acetyl-N-Substituted Benzenesulfonamide. Russ J Bioorg Chem 2020. [DOI: 10.1134/s1068162020050052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Vurmaz A, Ertekin A, Sabaner MC, Atay E, Bozkurt E, Bilir A. Effects of vitamin E in a glucocorticoid induced cataract model in chicken embryos. Biotech Histochem 2020; 96:431-438. [PMID: 32957855 DOI: 10.1080/10520295.2020.1818284] [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: 10/23/2022] Open
Abstract
We investigated the antioxidant effects of vitamin E on a glucocorticoid (GC) induced model of cataracts in chick embryos. We used 70 fertilized eggs divided into seven groups as follows: phosphate-buffered saline (PBS) group, olive oil treatment (OO) group, hydrocortisone treatment (HC) group, olive oil and hydrocortisone treatment (OO + HC) group, 50 mg/kg vitamin E and hydrocortisone treatment (HC + VE (50)) group, 25 mg/kg vitamin E and hydrocortisone treatment (HC + VE (25)) group and 15 mg/kg vitamin E and hydrocortisone treatment (HC + VE (15)) group. On day 17, chick embryos were removed from the eggs and lens and liver tissues were excised. Cataract formation was evaluated and total antioxidant status (TAS), total oxidant status (TOS), malondialdehyde (MDA) and glutathione peroxidase (GPx) were measured in lens and liver tissues; MDA was measured only in liver. The lenses in the HC + VE (50) group exhibited significantly higher levels of GPx and TAS, and lower levels of TOS than for HC and OO + HC groups. The livers of the HC + VE (50) group exhibited significantly higher levels of GPx and lower levels of MDA than for the HC and OO + HC groups. The HC + VE (50) group lenses were evaluated as grade 1, because the nuclei were completely free of cataracts, likely due to the antioxidative effect of high dose VE. VE is an effective antioxidant agent that exhibits a dose-response effect, for ameliorating the negative effects of GCs.
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Affiliation(s)
- A Vurmaz
- Department of Biochemistry, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - A Ertekin
- Department of Emergency Medicine, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - M Cem Sabaner
- Department of Ophthalmology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - E Atay
- Department of Anatomy, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - E Bozkurt
- Department of Internal Medicine, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - A Bilir
- Department of Anatomy, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
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Doğusal G, Afacan B, Bozkurt E, Sönmez I. Gingival crevicular fluid and salivary resistin and tumor necrosis factor-alpha levels in obese children with gingivitis. J Periodontol 2019; 89:973-982. [PMID: 29635809 DOI: 10.1002/jper.17-0613] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 10/17/2017] [Revised: 02/08/2018] [Accepted: 02/13/2018] [Indexed: 11/08/2022]
Abstract
BACKGROUND This study aimed to evaluate the levels of resistin and tumor necrosis factor-alpha (TNF-α) in gingival crevicular fluid (GCF) and saliva of obese children with gingivitis. METHODS One-hundred and thirty children (65 obese and 65 normal weight; age range 8 to 12 years) were recruited for the study. The children were classified into four subgroups based on their body mass and periodontal status; 1) obese children with gingivitis (OG, n = 33); 2) obese children with healthy periodontium (OH, n = 32); 3) normal weight children with gingivitis (NWG, n = 32); 4) normal weight children with healthy periodontium (NWH, n = 33). Body mass index (BMI) percentile, probing pocket depth (PPD), gingival index (GI), and plaque index (PI) were recorded. Resistin and TNF-α were analyzed in GCF and saliva samples by ELISA. RESULTS Obese children had higher BMI percentiles than normal weight children (p < 0.0001). PPD, GI, PI, GCF volume, GCF, and salivary resistin and TNF-α levels were similar between obese and normal weight children (P > 0.05). OG and NWG subgroups had significantly higher GI, PI, GCF volume, GCF resistin total amounts, and salivary resistin concentrations but lower GCF resistin and TNF-α concentrations than OH and NWH (P < 0.0001 for all). GCF resistin total amounts were positively correlated with GI, PI, and GCF TNF-α total amounts (P < 0.05). CONCLUSIONS To our knowledge, this is the first study evaluated the levels of resistin in GCF and saliva of children. Obesity is not associated with GCF and salivary resistin and TNF-α levels in children in the presence of gingival inflammation.
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Affiliation(s)
- Gülçin Doğusal
- Department of Pediatric Dentistry, Faculty of Dentistry, Adnan Menderes University, Aydın, Turkey
| | - Beral Afacan
- Department of Periodontology, Faculty of Dentistry, Adnan Menderes University, Aydın, Turkey
| | - Emir Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Işıl Sönmez
- Department of Pediatric Dentistry, Faculty of Dentistry, Adnan Menderes University, Aydın, Turkey
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De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Ž, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Z, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, Kotseva K, De Backer G, Abreu A, Aguiar C, Badariene J, Bruthans J, Castro Conde A, Cifkova R, Crowley J, Davletov K, Bacquer DD, De Smedt D, De Sutter J, Deckers J, Dilic M, Dolzhenko M, Druais H, Dzerve V, Erglis A, Fras Z, Gaita D, Gotcheva N, Grobbee D, Gyberg V, Hasan Ali H, Heuschmann P, Hoes A, Jankowski P, Lalic N, Lehto S, Lovic D, Maggioni A, Mancas S, Marques-Vidal P, Mellbin L, Miličić D, Mirrakhimov E, Oganov R, Pogosova N, Reiner Ž, Rydén L, Stagmo M, Störk S, Sundvall J, Tokgözoğlu L, Tsioufis K, Vulic D, Wood D, Wood D, Kotseva K, Jennings C, Adamska A, Adamska S, Rydén L, Mellbin L, Tuomilehto J, Schnell O, Druais H, Fiorucci E, Glemot M, Larras F, Missiamenou V, Maggioni A, Taylor C, Ferreira T, Lemaitre K, Bacquer DD, De Backer G, Raman L, Sundvall J, DeSmedt D, De Sutter J, Willems A, De Pauw M, Vervaet P, Bollen J, Dekimpe E, Mommen N, Van Genechten G, Dendale P, Bouvier C, Chenu P, Huyberechts D, Persu A, Dilic M, Begic A, Durak Nalbantic A, Dzubur A, Hadzibegic N, Iglica A, Kapidjic S, Osmanagic Bico A, Resic N, Sabanovic Bajramovic N, Zvizdic F, Vulic D, Kovacevic-Preradovic T, Popovic-Pejicic S, Djekic D, Gnjatic T, Knezevic T, Kovacevic-Preradovic T, Kos L, Popovic-Pejicic S, Stanetic B, Topic G, Gotcheva N, Georgiev B, Terziev A, Vladimirov G, Angelov A, Kanazirev B, Nikolaeva S, Tonkova D, Vetkova M, Milicic D, Reiner Ž, Bosnic A, Dubravcic M, Glavina M, Mance M, Pavasovic S, Samardzic J, Batinic T, Crljenko K, Delic-Brkljacic D, Dula K, Golubic K, Klobucar I, Kordic K, Kos N, Nedic M, Olujic D, Sedinic V, Blazevic T, Pasalic A, Percic M, Sikic J, Bruthans J, Cífková R, Hašplová K, Šulc P, Wohlfahrt P, Mayer O, Cvíčela M, Filipovský J, Gelžinský J, Hronová M, Hasan-Ali H, Bakery S, Mosad E, Hamed H, Ibrahim A, Elsharef M, Kholef E, Shehata A, Youssef M, Elhefny E, Farid H, Moustafa T, Sobieh M, Kabil H, Abdelmordy A, Lehto S, Kiljander E, Kiljander P, Koukkunen H, Mustonen J, Cremer C, Frantz S, Haupt A, Hofmann U, Ludwig K, Melnyk H, Noutsias M, Karmann W, Prondzinsky R, Herdeg C, Hövelborn T, Daaboul A, Geisler T, Keller T, Sauerbrunn D, Walz-Ayed M, Ertl G, Leyh R, Störk S, Heuschmann P, Ehlert T, Klocke B, Krapp J, Ludwig T, Käs J, Starke C, Ungethüm K, Wagner M, Wiedmann S, Tsioufis K, Tolis P, Vogiatzi G, Sanidas E, Tsakalis K, Kanakakis J, Koutsoukis A, Vasileiadis K, Zarifis J, Karvounis C, Crowley J, Gibson I, Houlihan A, Kelly C, O'Donnell M, Bennati M, Cosmi F, Mariottoni B, Morganti M, Cherubini A, Di Lenarda A, Radini D, Ramani F, Francese M, Gulizia M, Pericone D, Davletov K, Aigerim K, Zholdin B, Amirov B, Assembekov B, Chernokurova E, Ibragimova F, Kodasbayev A, Markova A, Mirrakhimov E, Asanbaev A, Toktomamatov U, Tursunbaev M, Zakirov U, Abilova S, Arapova R, Bektasheva E, Esenbekova J, Neronova K, Asanbaev A, Baigaziev K, Toktomamatov U, Zakirov U, Baitova G, Zheenbekov T, Erglis A, Andrejeva T, Bajare I, Kucika G, Labuce A, Putane L, Stabulniece M, Dzerve V, Klavins E, Sime I, Badariene J, Gedvilaite L, Pečiuraite D, Sileikienė V, Skiauteryte E, Solovjova S, Sidabraite R, Briedis K, Ceponiene I, Jurenas M, Kersulis J, Martinkute G, Vaitiekiene A, Vasiljevaite K, Veisaite R, Plisienė J, Šiurkaitė V, Vaičiulis Ž, Jankowski P, Czarnecka D, Kozieł P, Podolec P, Nessler J, Gomuła P, Mirek-Bryniarska E, Bogacki P, Wiśniewski A, Pająk A, Wolfshaut-Wolak R, Bućko J, Kamiński K, Łapińska M, Paniczko M, Raczkowski A, Sawicka E, Stachurska Z, Szpakowicz M, Musiał W, Dobrzycki S, Bychowski J, Kosior D, Krzykwa A, Setny M, Kosior D, Rak A, Gąsior Z, Haberka M, Gąsior Z, Haberka M, Szostak-Janiak K, Finik M, Liszka J, Botelho A, Cachulo M, Sousa J, Pais A, Aguiar C, Durazzo A, Matos D, Gouveia R, Rodrigues G, Strong C, Guerreiro R, Aguiar J, Abreu A, Cruz M, Daniel P, Morais L, Moreira R, Rosa S, Rodrigues I, Selas M, Gaita D, Mancas S, Apostu A, Cosor O, Gaita L, Giurgiu L, Hudrea C, Maximov D, Moldovan B, Mosteoru S, Pleava R, Ionescu M, Parepa I, Pogosova N, Arutyunov A, Ausheva A, Isakova S, Karpova A, Salbieva A, Sokolova O, Vasilevsky A, Pozdnyakov Y, Antropova O, Borisova L, Osipova I, Lovic D, Aleksic M, Crnokrak B, Djokic J, Hinic S, Vukasin T, Zdravkovic M, Lalic N, Jotic A, Lalic K, Lukic L, Milicic T, Macesic M, Stanarcic Gajovic J, Stoiljkovic M, Djordjevic D, Kostic S, Tasic I, Vukovic A, Fras Z, Jug B, Juhant A, Krt A, Kugonjič U, Chipayo Gonzales D, Gómez Barrado J, Kounka Z, Marcos Gómez G, Mogollón Jiménez M, Ortiz Cortés C, Perez Espejo P, Porras Ramos Y, Colman R, Delgado J, Otero E, Pérez A, Fernández-Olmo M, Torres-LLergo J, Vasco C, Barreñada E, Botas J, Campuzano R, González Y, Rodrigo M, de Pablo C, Velasco E, Hernández S, Lozano C, González P, Castro A, Dalmau R, Hernández D, Irazusta F, Vélez A, Vindel C, Gómez-Doblas J, García Ruíz V, Gómez L, Gómez García M, Jiménez-Navarro M, Molina Ramos A, Marzal D, Martínez G, Lavado R, Vidal A, Rydén L, Boström-Nilsson V, Kjellström B, Shahim B, Smetana S, Hansen O, Stensgaard-Nake E, Deckers J, Klijn A, Mangus T, Peters R, Scholte op Reimer W, Snaterse M, Aydoğdu S, Ç Erol, Otürk S, Tulunay Kaya C, Ahmetoğlu Y, Ergene O, Akdeniz B, Çırgamış D, Akkoyun H Kültürsay S, Kayıkçıoğlu M, Çatakoğlu A, Çengel A, Koçak A, Ağırbaşlı M, Açıksarı G, Çekin M, Tokgözoğlu L, Kaya E, Koçyiğit D, Öngen Z, Özmen E, Sansoy V, Kaya A, Oktay V, Temizhan A, Ünal S, İ Yakut, Kalkan A, Bozkurt E, Kasapkara H, Dolzhenko M, Faradzh C, Hrubyak L, Konoplianyk L, Kozhuharyova N, Lobach L, Nesukai V, Nudchenko O, Simagina T, Yakovenko L, Azarenko V, Potabashny V, Bazylevych A, Bazylevych M, Kaminska K, Panchenko L, Shershnyova O, Ovrakh T, Serik S, Kolesnik T, Kosova H, Wood D, Adamska A, Adamska S, Jennings C, Kotseva K, Hoye P Atkin A, Fellowes D, Lindsay S, Atkinson C, Kranilla C, Vinod M, Beerachee Y, Bennett C, Broome M, Bwalya A, Caygill L, Dinning L, Gillespie A, Goodfellow R, Guy J, Idress T, Mills C, Morgan C, Oustance N, Singh N, Yare M, Jagoda J, Bowyer H, Christenssen V, Groves A, Jan A, Riaz A, Gill M, Sewell T, Gorog D, Baker M, De Sousa P, Mazenenga T, Porter J, Haines F, Peachey T, Taaffe J, Wells K, Ripley D, Forward H, McKie H, Pick S, Thomas H, Batin P, Exley D, Rank T, Wright J, Kardos A, Sutherland SB, Wren L, Leeson P, Barker D, Moreby B, Sawyer J, Stirrup J, Brunton M, Brodison A, Craig J, Peters S, Kaprielian R, Bucaj A, Mahay K, Oblak M, Gale C, Pye M, McGill Y, Redfearn H, Fearnley M. Management of dyslipidaemia in patients with coronary heart disease: Results from the ESC-EORP EUROASPIRE V survey in 27 countries. Atherosclerosis 2019; 285:135-146. [DOI: 10.1016/j.atherosclerosis.2019.03.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/22/2019] [Accepted: 03/19/2019] [Indexed: 12/16/2022]
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Kaya C, Bozkurt E, Türkyılmaz Mut D, Mihmanli M, Uludağ M. WHICH FACTORS ARE ASSOCIATED WITH MALIGNANCY IN THYROID NODULES CLASSIFIED AS BETHESDA CATEGORY 3 (AUS/FLUS) AND HOW DO THEY INFLUENCE THE PATIENT'S MANAGEMENT? Acta Endocrinol (Buchar) 2019; 15:491-496. [PMID: 32377247 DOI: 10.4183/aeb.2019.491] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Background Thyroid nodules are a common pathology worldwide. Fine needle aspiration biopsy (FNAB) is an important diagnostic method for the investigation of malignancy in thyroid nodules. However, according to the Bethesda System used to classify the results, patients with atypia of undetermined significance/follicular lesion of undetermined significance (AUS / FLUS) may not be classified as benign or malignant. Therefore, it may be necessary to determine some clinical risk factors to apply the best treatment in these patients. Aim To determine the factors that increase the risk of malignancy in this patient group. Methods A retrospective study including 138 patients with an FNAB categorized as AUS/FLUS and operated between June 2015-September 2018. Demographical, Laboratory (TSH) and Ultrasound variables (number, size and characteristics of nodules) of the patients were compared among postoperative histopathological results. Results Hypo-echoic structure, microcalcification and irregular margin of the nodules were detected to be associated with malignancy in patients with FNAB results of AUS/FLUS (p <0.001). Conclusion We suggest that surgical treatment should be considered if the patients have nodules with the hypo-echoic structure, microcalcification and irregular margin with an FNAB histopathological result of AUS / FLUS.
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Affiliation(s)
- C Kaya
- University of Health Sciences, Hamidiye Etfal Medical Practice and Research Center - General Surgery - Istanbul, Turkey
| | - E Bozkurt
- University of Health Sciences, Hamidiye Etfal Medical Practice and Research Center - Kelkit State Hospital - General Surgery, Gümüşhane, Turkey
| | - D Türkyılmaz Mut
- University of Health Sciences, Hamidiye Etfal Medical Practice and Research Center - Radiology, Istanbul, Turkey
| | - M Mihmanli
- University of Health Sciences, Hamidiye Etfal Medical Practice and Research Center - General Surgery - Istanbul, Turkey
| | - M Uludağ
- University of Health Sciences, Hamidiye Etfal Medical Practice and Research Center - General Surgery - Istanbul, Turkey
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Afacan B, Öztürk VÖ, Paşalı Ç, Bozkurt E, Köse T, Emingil G. Gingival crevicular fluid and salivary HIF‐1α, VEGF, and TNF‐α levels in periodontal health and disease. J Periodontol 2018; 90:788-797. [DOI: 10.1002/jper.18-0412] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/12/2018] [Accepted: 11/19/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Beral Afacan
- Department of PeriodontologyFaculty of DentistryAdnan Menderes University Aydın Turkey
| | - Veli Özgen Öztürk
- Department of PeriodontologyFaculty of DentistryAdnan Menderes University Aydın Turkey
| | - Çiğdem Paşalı
- Department of PeriodontologyFaculty of DentistryEge University İzmir Turkey
| | - Emir Bozkurt
- Section of Molecular BiologyDepartment of BiologyFaculty of Science and LettersCelal Bayar University Manisa Turkey
| | - Timur Köse
- Department of Biostatistics and Medical InformaticsFaculty of MedicineEge University İzmir Turkey
| | - Gülnur Emingil
- Department of PeriodontologyFaculty of DentistryEge University İzmir Turkey
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Bozkurt E, Dussmann H, Prehn JH. Abstract LB-193: TRAIL promotes entosis through Caspase-8. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-lb-193] [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
Despite its apoptosis-inducing activity, tumor necrosis factor-related apoptosis inducing ligand (TRAIL) also activates survival signaling pathways. Survival signaling not only interferes with apoptosis and causes resistance, but can also lead to gain of several tumor-promoting functions such as proliferation, invasion and metastasis. Here we demonstrate that colorectal cancer cells surviving from TRAIL treatment can initiate a cell-in-cell invasion process known as entosis. Entosis refers to a unique cell-in-cell phenomenon, in which one or more viable cells are actively internalized into another cell of the same type. After formation of cell-in-cell structures (CICs), internalized cells can divide inside the host cell or they can escape, however, the vast majority of cells undergo cell death inside their hosts, through a lysosome-dependent mechanism. Although the clinical relevance of entosis is highly context-dependent, the frequency of entosis has been shown associated with tumor grade and poor outcome in several malignancies. While monitoring single-cell response upon TRAIL stimulation, we noted that some cells internalized into their neighboring cells and died inside a vacuole. We confirmed CICs by fluorescence staining of cytoplasm, nucleus, lysosome and cell membrane, in addition to TEM. Further quantification revealed that TRAIL indeed increased the number of CICs in colorectal cancer cell lines (HCT116 and LS180) and spheroids. Moreover, both pre-treatment with ROCK inhibitor (Y-27632) and knockout of Caspase-8 resulted in a significant reduction in the number of TRAIL-induced CICs. After forming cell-in-cell structures, the majority of internalized cells appeared positive for lysotracker staining and underwent cell death inside their hosts. These cells showed an increase in IETD FRET probe cleavage, additionally, we observed increased levels of cleaved caspase-8, cleaved caspase-9 and cleaved caspase-3 in these cells in presence of TRAIL. Pre-treatment with z-VAD-fmk reduced the number of internalized cells undergoing cell death and Bax/Bak double knockout cells escaped from their hosts without undergoing cell death in response to TRAIL. Our findings demonstrate that entosis can be induced by TRAIL in a caspase-8-dependent manner, and may give new insights in understanding the death, survival and escape mechanisms in internalized cells.
Citation Format: Emir Bozkurt, Heiko Dussmann, Jochen H. Prehn. TRAIL promotes entosis through Caspase-8 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr LB-193.
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Affiliation(s)
- Emir Bozkurt
- Royal College of Surgeons in Ireland, Dublin, Ireland
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Fichtner M, Bozkurt E, McAllister K, McCann C, Longley D, Prehn JH. Abstract 3907: Birinapant co-treatments of colon cancer cell lines show consensus molecular subtype-specific synergistic effects. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-3907] [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
Colorectal cancer (CRC) is one of the leading causes of cancer-related deaths worldwide. Despite recent advances, the treatment success differs strongly between colorectal cancer patients and new treatment options are urgently needed. Since most tumors avoid apoptosis by a dysregulation of Inhibitor of apoptosis proteins (IAPs), IAP inhibitors such as the SMAC mimetic birinapant are promising new drugs for the treatment of CRC. However, it is currently not possible to stratify for patients who might benefit from adjuvant therapy and those who need new treatments. In 2015, an international consortium unified six independent subtyping approaches and defined 4 distinct, so-called consensus molecular subtypes (CMS). The CMSs are the current gold standard for CRC subtyping and have some prognostic values. Nevertheless, whether the CMS classification can be used to estimate the treatment success is currently under investigation. This study aimed to evaluate the efficacy of treatments with the chemotherapeutics oxaliplatin and 5-fluoruracil (5-FU), TNFalpha, the SMAC-mimetic birinapant and a combination of these drugs. We selected 10 cell lines, representing the four CMSs, and treated them for 24h and 48h with the respective drugs. At both time points, we assessed the cell death by staining with Annexin V/PI followed by flow cytometric analysis of the cells. We were able to show that birinapant has very strong synergistic effects if used in combination with either oxaliplatin/5-FU or TNFalpha, but does not induce apoptosis alone. Importantly, the efficacy of the various co-treatments differed between the cell lines. These differences can, to some extent, be linked to the corresponding CMS of the cells. Cells belonging to the CMS1 subtype showed strong synergistic effects of birinapant and oxaliplatin/5-FU. In contrast, birinapant and TNFalpha co-treatments showed synergistic effects in CMS2 cells, but not in CMS1 cells. Cells belonging to the CMS3 subtype, however, showed a mixed but generally weak response to the co-treatments. Our results highlight birinapant as a promising drug for the treatment of CRC. Our data also suggest that CMSs not only have prognostic values but may also be used as patient stratification tools.
Citation Format: Michael Fichtner, Emir Bozkurt, Katherine McAllister, Christopher McCann, Daniel Longley, Jochen H. Prehn. Birinapant co-treatments of colon cancer cell lines show consensus molecular subtype-specific synergistic effects [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 3907.
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Affiliation(s)
| | - Emir Bozkurt
- 1Royal College of Surgeons in Ireland, Dublin, Ireland
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Yurekli BS, Karaca B, Kisim A, Bozkurt E, Atmaca H, Cetinkalp S, Ozgen G, Yilmaz C, Uzunoglu S, Uslu R, Saygili F. AT-101 acts as anti-proliferative and hormone suppressive agent in mouse pituitary corticotroph tumor cells. J Endocrinol Invest 2018; 41:233-240. [PMID: 28730425 DOI: 10.1007/s40618-017-0733-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 07/12/2017] [Indexed: 01/19/2023]
Abstract
PURPOSE Gossypol, a naturally occurring compound in cottonseeds, has anticancer effects against several tumor cell lines. It has been extensively studied in clinical trials and is well tolerated with a favorable safety profile. AT-101, a derivative of R (-)-gossypol, binds to Bcl-2 family proteins and induces apoptosis in vitro. Although transsphenoidal surgical excision of the pituitary corticotroph adenoma is the gold standard of care, it is not successful all the time. Medical therapy for Cushing's disease still remains a challenge for the clinicians. We aimed to investigate the cytotoxic and apoptotic effects of AT-101 in mouse pituitary corticotroph tumor AtT20 cells. METHODS Cytotoxic effect of AT-101 was assessed by XTT cell viability assay. Apoptosis was shown by measuring DNA fragmentation and Caspase-3/7 activity. Changes in mRNA expressions of apoptosis-related genes were investigated by qPCR array after treatment with AT-101. ACTH was measured by ACTH-EIA Kit. RESULTS AT-101 induced cytotoxicity and apoptosis in AtT20 cells. mRNA levels of pro-apoptotic genes such as TNFR-SF-10B, Bid, PYCARD, Caspase-8, Caspase-3, and Caspase-7 were induced by 2.0-, 1.5-, 1.7-, 1.5-, 1.6-, and 2-fold, respectively, in AtT20 cells by AT-101 treatment. Moreover, some of the anti-apoptotic genes such as BCL2L10, NAIP1, and PAK-7 were reduced by 2.1-, 2.3-, 4.0-fold, respectively, in AtT20 cells. AT-101 also decreased ACTH secretion significantly. CONCLUSION AT-101 induces apoptosis in mouse pituitary corticotroph tumor cells.
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Affiliation(s)
- B S Yurekli
- Division of Endocrinology and Metabolism, Ege University School of Medicine, 35100, Izmir, Turkey.
| | - B Karaca
- Division Medical Oncology, Tulay Aktas Oncology Hospital, Ege University School of Medicine, 35100, Izmir, Turkey
| | - A Kisim
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye/Manisa, Turkey
| | - E Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye/Manisa, Turkey
| | - H Atmaca
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye/Manisa, Turkey
| | - S Cetinkalp
- Division of Endocrinology and Metabolism, Ege University School of Medicine, 35100, Izmir, Turkey
| | - G Ozgen
- Division of Endocrinology and Metabolism, Ege University School of Medicine, 35100, Izmir, Turkey
| | - C Yilmaz
- Division of Endocrinology and Metabolism, Ege University School of Medicine, 35100, Izmir, Turkey
| | - S Uzunoglu
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye/Manisa, Turkey
| | - R Uslu
- Division Medical Oncology, Tulay Aktas Oncology Hospital, Ege University School of Medicine, 35100, Izmir, Turkey
| | - F Saygili
- Division of Endocrinology and Metabolism, Ege University School of Medicine, 35100, Izmir, Turkey
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Atmaca H, Bozkurt E, Cittan M, Dilek Tepe H. Effects of Galium aparine extract on the cell viability, cell cycle and cell death in breast cancer cell lines. J Ethnopharmacol 2016; 186:305-310. [PMID: 27085941 DOI: 10.1016/j.jep.2016.04.007] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/04/2016] [Accepted: 04/05/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Galium species have been traditionally used for its anti-cancer, antioxidant, anti-inflammatory, antimicrobial and cardioprotective effects in the folk medicine. Galium aparine (GA) is a typical climbing plant growing widespread in Anatolia. AIM OF THE STUDY To investigate the potential anti-proliferative and apoptotic effect of GA methanol (MeOH) extract on MCF-7 and MDA-MB-231 human breast cancer cells and MCF-10A untransformed breast epithelial cells. MATERIALS AND METHODS First, the extract was characterized by both liquid chromatography/quadrupole time-of-flight mass spectrometry (LC/Q-TOF/MS) and gas chromatography-mass spectrometry (GC-MS) analyses. Then, cell viability and cell cycle distribution were investigated by XTT assay and PI staining by flow cytometry, respectively. Cell death was determined by Annexin V FITC/7-AAD staining. RESULTS A total of 14 major phytochemicals were identified by LC/Q-TOF/MS and 34 volatile compounds were determined by GC-MS. The extract was cytotoxic in both breast cancer cell lines in a concentration and time dependent manner and showed G1 block after 72h extract treatment. However, it was not cytotoxic to MCF-10A breast epithelial cells. Flow cytometry analyses revealed that apoptosis was induced in MDA-MB-231 cells; however, necrosis was induced in MCF-7 cells. CONCLUSION Our study suggests that GA MeOH extract may have potential anti-cancer effects against breast cancer cells without impairing normal breast epithelial cells. Ability to induction of non-apoptotic cell death besides apoptotic cell death by this complex plant-derived mixture may enable the killing of apoptosis resistant breast cancer cells but further studies should be conducted to investigate the bioavailability and metabolism of it in vivo.
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Affiliation(s)
- Harika Atmaca
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey.
| | - Emir Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey.
| | - Mustafa Cittan
- Section of Analytical Chemistry, Department of Chemistry, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey.
| | - Hafize Dilek Tepe
- Section of Biochemistry, Department of Chemistry, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey.
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Koseoglu C, Erdogan M, Ertem A, Koseoglu G, Akoglu G, Aktas A, Ozdemir E, Kurmus O, Durmaz T, Keles T, Bozkurt E. Aortic Elastic Properties and Myocardial Performance Index Are Impaired in Patients with Lichen Planus. Med Princ Pract 2016; 25:247-53. [PMID: 26683851 PMCID: PMC5588385 DOI: 10.1159/000443478] [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] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 12/17/2015] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVES The aim of this study was to investigate the elastic properties of the aorta and the myocardial performance index of the left ventricle (LV) in patients with lichen planus (LP). SUBJECTS AND METHODS A total of 54 patients with LP and 50 controls were enrolled in the study. The 2 groups were well-matched regarding age, gender, body mass index, any smoking history, diabetes mellitus and systolic and diastolic blood pressure (SBP and DBP). The echocardiographic examination was performed on the study subjects and the controls. Aortic elasticity parameters and the myocardial performance index of the LV were calculated. The Student t test, the x03C7;2 test and multiple linear regression were used for the statistical analysis. RESULTS Aortic strain (AS, 4.77 ± 1.81 vs. 8.95 ± 2.22; p < 0.001) and aortic distensibility (AD, 0.25 ± 0.009 vs. 0.42 ± 0.120; p < 0.001) were significantly lower, and aortic stiffness index β (ASIβ, 3.65 ± 1.03 vs. 2.70 ± 0.91; p < 0.001) was significantly higher in the LP group than in the controls. The myocardial performance index (Tei index) was significantly higher in the LP group than in the control group (p = 0.001). The duration of the LP was negatively correlated with AS (r = -0.364, p < 0.001) and AD (r = -0.279, p = 0.006), and positively correlated with the Tei index (r = 0.324, p = 0.001) and ASIβ (r = 0.364, p < 0.001). After adjustment for relevant confounders (age, male gender, smoking, SBP, DBP, diabetes mellitus and low- and high-density lipoprotein cholesterol), LP and its duration were still associated with AS, AD and ASIβ. CONCLUSION In this study, AS and AD were lower and ASIβ and myocardial performance index higher in LP patients than in controls.
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Affiliation(s)
- C. Koseoglu
- Department of Cardiology, Ankara Training and Research Hospital, Departments of, Mersin, Turkey
- *Cemal Koseoglu, MD, Ankara Training and Research Hospital, Sukriye District, Ulucanlar Street, TR-06340 Altýndag, Ankara (Turkey), E-Mail
| | - M. Erdogan
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
| | - A.G. Ertem
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
| | - G. Koseoglu
- Department of Dermatology, Ankara University Faculty of Medicine, Ankara, Mersin, Turkey
| | - G. Akoglu
- Dermatology of Ataturk Training and Research Hospital, Mersin, Turkey
| | - A. Aktas
- Dermatology of Ataturk Training and Research Hospital, Mersin, Turkey
| | - E. Ozdemir
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
| | - O. Kurmus
- Department of Cardiology, Tarsus State Hospital, Mersin, Turkey
| | - T. Durmaz
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
| | - T. Keles
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
| | - E. Bozkurt
- Department of Cardiology, Tarsus State Hospital, Cardiology, Mersin, Turkey
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Gürkaş E, Ak F, Orhan G, Bozkurt E, Ulusoy EK. Proximal protection with hybrid stent, a safer combination for carotid artery stenting against carotid endarterectomy? INT ANGIOL 2015; 34:562-567. [PMID: 25394960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM Carotid revascularization is an established theurapeutic modality in preventing stroke and death among patients with severe carotid stenosis. Although carotid endarterectomy remains as the primary option, carotid stenting is accepted as an alternative for patients with high risk for carotid endarterectomy. Recently published reports have better results with proximal protection devices when compared with distal protection devices. These studies have revealed less microembolic signals and less periprocedural new ischemic lesions on diffusion weighted magnetic resonance imaging. Stent choice may be also important for these procedures as open cell stent design has advantage of better flexibility whereas closed cell systems have an advantage of better scaffolding. Hybrid stents which are composed of open cells in the proximal and distal part and closed cells in the middle may carry both advantages. The aim of this study is to demonstrate whether combination of proximal protection devices with hybrid stents can be a safe alternative for carotid stenting in terms of periprocedural and 30-day outcomes. METHODS Here we retrospectively evaluated 68 symptomatic carotid stenosis patients undergoing carotid stenting with hybrid stent (Cristallo Ideale®, Invatec s.r.l., Medtronic, Italy) and proximal protection device (MO.MA®, Invatec s.r.l., Medtronic, Italy). RESULTS Our results showed only 1 minor stroke in the periprocedural period and during the first 30-day after stenting, with no death or myocardial infarction. CONCLUSION Although our case number is not large, we propose that carotid stenting may be safer with utilization of proximal protection system and hybrid type carotid stents.
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Affiliation(s)
- E Gürkaş
- Neurology Clinics, Ankara Numune Education and Research Hospital, Ankara, Turkey -
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Gümüş P, Öztürk VÖ, Bozkurt E, Emingil G. Evaluation of the gingival inflammation in pregnancy and postpartum via 25-hydroxy-vitamin D3, prostaglandin E2 and TNF-α levels in saliva. Arch Oral Biol 2015; 63:1-6. [PMID: 26658365 DOI: 10.1016/j.archoralbio.2015.11.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 06/25/2015] [Revised: 09/30/2015] [Accepted: 11/22/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Physiological changes and immunological modifications occur during pregnancy. The clinical and biological features of periodontal infections are affected by pregnancy. The aim of the present study was to evaluate saliva levels of 25-hydroxy-vitamin D3 (25(OH)D3), prostaglandin E2 (PGE2) and TNF-alpha (TNF-α) in pregnancy, postpartum and non-pregnant controls. METHODS Whole saliva samples together with full-mouth clinical periodontal recordings were obtained from 59 pregnant, 47 post partum and 70 systemically healthy non-pregnant women. Groups were also evaluated according to the periodontal health status. 25(OH)D3, PGE2 and TNF-α levels in the saliva samples were determined by enzyme-linked immunoassays. Data were statistically tested by nonparametrical tests. RESULTS Saliva TNF-α and PGE2 levels were significantly lower and 25(OH)D3 levels were significantly higher in the pregnant group than postpartum group (p<0.0001). Saliva TNF-α and 25(OH)D3 levels were significantly higher and PGE2 levels were significantly lower in the control group than postpartum group (p<0.0001). In the pregnant healthy, gingivitis and periodontitis groups saliva TNF-α levels were significantly lower than postpartum and control counterparts (p<0.0001, p=0.032, p=0.003 and p=0.013; p=0.027; p=0.007, respectively). In control healthy, gingivitis and periodontitis groups saliva 25(OH)D3 levels were significantly higher than the postpartum counterparts (p<0.0001, p<0.0001, p=0.002, respectively). In the control healthy and gingivitis groups saliva 25(OH)D3 levels were significantly higher than pregnant healthy and gingivitis (p<0.0001). CONCLUSIONS In conclusion, within the limits of the present study it seems that pregnancy have an effect on parameters in saliva in relation to the periodontal status of the women. Further studies are required for better understanding of the impact of periodontal diseases on pregnancy or otherwise.
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Affiliation(s)
- Pınar Gümüş
- Department of Periodontology, School of Dentistry, Ege University, İzmir, Turkey.
| | - V Özgen Öztürk
- Department of Periodontology, School of Dentistry, Adnan Menderes University, Aydin, Turkey
| | - Emir Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Gülnur Emingil
- Department of Periodontology, School of Dentistry, Ege University, İzmir, Turkey
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Atmaca H, Bozkurt E. Apoptotic and anti-angiogenic effects of Salvia triloba extract in prostate cancer cell lines. Tumour Biol 2015; 37:3639-46. [PMID: 26459311 DOI: 10.1007/s13277-015-4208-2] [Citation(s) in RCA: 9] [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: 09/07/2015] [Accepted: 10/05/2015] [Indexed: 01/02/2023] Open
Abstract
Plants, due to their remarkable composition, are considered as natural resources of bioactive compounds with specific biological activities. Salvia genus (Lamiaceae) has been used around the world in complementary medicine since ancient times. We investigated the cytotoxic, apoptotic and anti-angiogenic effects of methanolic Salvia triloba extract (STE) in prostate cancer cells. Cell viability was evaluated by XTT; apoptosis was investigated by DNA fragmentation and caspase 3/7 activity assays. Changes in the angiogenic cytokine levels were investigated by human angiogenesis antibody array. Scratch assay was used to determine the cell motility. STE induced cytotoxicity and apoptosis in a concentration-dependent manner in both cancer cells; however, it was not cytotoxic to normal cells. Cell motility was reduced in PC-3, DU-145 and HUVEC cells by STE treatment. ANG, ENA-78, bFGF, EGF, IGF-1 and VEGF-D levels were significantly decreased by -2.9, -3.7, -1.7, -1.7, -2.0 and -1.8 fold in STE-treated DU-145 cells, however, ANG, IL-8, LEP, RANTES, TIMP-1, TIMP-2 and VEGF levels were significantly decreased by -5.1, -2.0, -2.4, -3.1, -1.5, -2.0 and -2.5 fold in PC-3 cells. These data suggest that STE might be a promising candidate for anti-tumor and anti-angiogenic treatment of prostate cancer.
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Affiliation(s)
- Harika Atmaca
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye, Manisa, Turkey.
| | - Emir Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140, Muradiye, Manisa, Turkey
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Kasapkara HA, Şentürk A, Bilen E, Duran Karaduman B, Ayhan H, Özen MB, Durmaz T, Keleş T, Bozkurt E. The usefulness of left atrial volume index and left ventricular mass index in determining subclinical cardiac involvement in patients with early-stage sarcoidosis. Ir J Med Sci 2015; 185:617-621. [PMID: 26023058 DOI: 10.1007/s11845-015-1318-1] [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: 04/04/2015] [Accepted: 05/23/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND AIM Sarcoidosis is a multi-systemic granulomatous disease of unknown etiology. The present study has been designed to evaluate the importance of diastolic dysfunction with left atrial volume index (LAVi) and left ventricular mass index (LVMi) in determining subclinical cardiac involvement in subjects with stage I-II pulmonary sarcoidosis. METHODS A total of 54 patients under follow-up for sarcoidosis without cardiac involvement and 56 healthy subjects were included in the study. The echocardiographic assessment of the patients revealed no significant difference between the two groups regarding left ventricular end-systolic and end-diastolic diameters, ejection fraction (LVEF) and annular velocity determined by tissue Doppler evaluation. RESULTS The LVEF calculated was 61.8 ± 7.8 % in the sarcoidosis group versus 64.1 ± 2.7 % in the control group (p = 0.04). Left ventricular interventricular septum thickness, posterior wall thickness, and relative wall thickness were significantly higher in the sarcoidosis group compared to the control group (p < 0.001). The sarcoidosis group had higher LVM and LVMi values compared to the control group (145 ± 18.1 and 79 ± 14 g/m(2), 135 ± 27.7 and 74 ± 14.2 g/m(2); p = 0.020 and p = 0.021, respectively). Left atrial end-systolic volume and LAVi were higher in the sarcoidosis group (28.7 ± 18.5; 15.6 ± 10.2) compared to the control group (16.6 ± 10.9; 8.9 ± 5.5) with a statistically significant difference (p < 0.001). CONCLUSION The present study indicates diastolic dysfunction and increased LVMi despite normal systolic function in patients with early-stage sarcoidosis without cardiac involvement. Also, the diastolic parameters were normal without showing any significant difference compared to the control group while there was a statistically significant increase in LAVi. This finding suggests that LAVi may be the earliest marker of diastolic dysfunction in patients with early-stage sarcoidosis without cardiac involvement.
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Affiliation(s)
- H A Kasapkara
- Faculty of Medicine, Department of Cardiology, Yıldırım Beyazıt University, Ankara, Turkey
| | - A Şentürk
- Department of Pulmonary Diseases, Ankara Ataturk Education and Research Hospital, Ankara, Turkey
| | - E Bilen
- Department of Cardiology, Ankara Ataturk Education and Research Hospital, Bilkent, 06800, Ankara, Turkey
| | - B Duran Karaduman
- Department of Cardiology, Ankara Ataturk Education and Research Hospital, Bilkent, 06800, Ankara, Turkey
| | - H Ayhan
- Faculty of Medicine, Department of Cardiology, Yıldırım Beyazıt University, Ankara, Turkey. .,Department of Cardiology, Ankara Ataturk Education and Research Hospital, Bilkent, 06800, Ankara, Turkey.
| | - M B Özen
- Department of Cardiology, Ankara Ataturk Education and Research Hospital, Bilkent, 06800, Ankara, Turkey
| | - T Durmaz
- Faculty of Medicine, Department of Cardiology, Yıldırım Beyazıt University, Ankara, Turkey
| | - T Keleş
- Faculty of Medicine, Department of Cardiology, Yıldırım Beyazıt University, Ankara, Turkey
| | - E Bozkurt
- Faculty of Medicine, Department of Cardiology, Yıldırım Beyazıt University, Ankara, Turkey
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Pinar A, Ozer O, Karaca B, Bozkurt E, Uslu R. Cytotoxic effects of cabazitaxel on human gliomaspheres and monolayer glioma cells: A comparative study between 2D and 3D cell cultures. J Clin Oncol 2015. [DOI: 10.1200/jco.2015.33.15_suppl.e13049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Atike Pinar
- Ege University, Division of Medical Oncology, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | | | - Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Ruchan Uslu
- Ege University School of Medicine, Izmir, Turkey
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Sari C, Ayhan H, Aslan AN, Durmaz T, Keleş T, Baştuğ S, Bayram NA, Bilen E, Kasapkara HA, Bozkurt E. Predictors and incidence of access site complications in transcatheter aortic valve implantation with the use of new delivery systems. Perfusion 2015; 30:666-74. [DOI: 10.1177/0267659115578002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objectives: The aim of this single-center study was to assess the incidence and predictors of in-hospital access site complications related to transcatheter aortic valve implantation (TAVI) performed with new delivery systems in our hospital which has the largest case series in Turkey. Materials and method: We performed successful TAVI with the Edwards Sapien XT valve to 127 (46 male) patients via a transfemoral (121), trans-subclavian (5) and transapical (1) approach. Access site complications were defined according to the Valve Academic Research Consortium (VARC) end-point definitions. Results: Vascular complications occurred in 10.1% of patients. There was negative correlation between vascular complications and diameter of the common femoral artery (r = − 0.301, p=0.004), external iliac artery (r = − 0.327, p=0.004) and common iliac artery (r = − 0.324, p=0.004), but positive correlation between diabetes (r =0.240, p=0.008), sheath to femoral artery ratio (SFAR), sheath to external iliac artery ratio (SEIAR), procedure time, discharge time and the Society of Thoracic Surgeons (STS) score (respectively; r=0.339, 0.001, 0.527, 0.361, 0.289, p=0.003, 0.001, 0.001, 0.001, 0.002). The incidence of vascular complications was significantly higher in patients with diabetes and a high STS score. VARC bleeding complications occurred in 11.7 % of patients. The learning curve pointing out the importance of experience was significantly important in decreasing both bleeding and vascular complications. Conclusions: In this study, we demonstrated that major vascular complications related to TAVI decrease with the use of smaller delivery systems and experience and increase with high-risk scores (STS) and the presence of diabetes. In addition, VARC major vascular complications, observed mostly in patients with diabete mellitus (DM) and high STS scores, were associated with vascular diameters. These results further underline the importance of experience and a multidisciplinary team in patient selection and management for TAVI.
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Affiliation(s)
- C Sari
- Department of Cardiology, Ataturk Research and Training Hospital, Ankara, Turkey
| | - H Ayhan
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
| | - AN Aslan
- Department of Cardiology, Ataturk Research and Training Hospital, Ankara, Turkey
| | - T Durmaz
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
| | - T Keleş
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
| | - S Baştuğ
- Department of Cardiology, Ataturk Research and Training Hospital, Ankara, Turkey
| | - N Akar Bayram
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
| | - E Bilen
- Department of Cardiology, Ataturk Research and Training Hospital, Ankara, Turkey
| | - HA Kasapkara
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
| | - E Bozkurt
- Cardiology Department, Yıldırım Beyazıt University, Ankara, Turkey
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Yazici P, Bozkurt E, Citgez B, Kaya C, Mihmanli M, Uludag M. Incidental parathyroidectomy as a cause of postoperative hypocalcemia after thyroid surgery: reality or illusion? MINERVA CHIR 2014; 69:315-320. [PMID: 25242004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM We aimed to investigate the incidence and clinical relevance of incidental parathyroidectomy (IPT) following thyroid surgery. METHODS A retrospective review of thyroid operations was performed between January 2013 and January 2014. Pathology and operative reports were analyzed to identify the specimens which included parathyroid tissue. Information related to diagnosis, operative details and postoperative complications were collected. Calcium levels of ≤8 mg/dL was defined as biochemical hypocalcemia and those presenting with classic findings of acute hypocalcemia, were classified as clinical hypocalcemia. RESULTS Two hundred and forty-five thyroid procedures were performed during study period. IPT was found in 34 (13.8%) cases: 25 were benign and 9 were malignant. Parathyroid tissue was found intrathyroidal in 6 patients (17.6%); lobar locations were right lobe in 19 (55.8%) and left lobe in 13 (38.2%) and isthmus in 2 cases (5.8%). The frequency of biochemical and clinical hypocalcemia were 50% (N.=17) and 8.8% (N.=3), respectively. Neither surgical type (lobectomy or thyroidectomy) nor malignancy (benign or malign) was not found associated with biochemical hypocalcemia. In those with biochemical hypocalcemia, left location of both dominant nodule and extracted parathyroid gland were significantly higher (P=0.01 and 0.04, respectively). CONCLUSION Incidental parathyroidectomy which is not uncommon (13.8%) after thyroidectomy is not associated with postoperative biochemical hypocalcemia. Neither the type of surgical procedure (lobectomy or thyroidectomy) nor the pathology but adjacent dominant nodule location may increase the risk of IPT.
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Affiliation(s)
- P Yazici
- Department of General Surgery, Sisli Etfal Training and Research Hospital, Istanbul, Turkey -
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Bozkurt E, Sari C, Keles T, Durmaz T, Aslan A, Bastug S, Akar Bayram N, Akcay M, Ayhan H, Kasapkara H, Bilen E. Transfemoral balloon expandable aortic valve implantation on a patient with chronic lymphocytic leukemia following mitral valve prosthesis. Minerva Cardioangiol 2014; 62:501-504. [PMID: 25420504] [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: 06/04/2023]
Affiliation(s)
- E Bozkurt
- Yıldırım Beyazıt University, Cardiology Department, Ankara, Turkey:2 Department of Cardiology, Ataturk Research and Training Hospital, Ankara, Turkey -
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Dirican A, Erten C, Atmaca H, Bozkurt E, Kucukzeybek Y, Varol U, Oktay Tarhan M, Karaca B, Uslu R. Enhanced cytotoxicity and apoptosis by thymoquinone in combination with zoledronic acid in hormone- and drug-resistant prostate cancer cell lines. J BUON 2014; 19:1055-1061. [PMID: 25536616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE Thymoquinone (TQ), an active ingredient of black seed oil (Nigella Sativa), has been shown to possess cytotoxic activity against a variety of cancer cell lines. Our purpose was to investigate if the cytotoxic and apoptotic effect of zoledronic acid (ZA) can be enhanced by the addition of the TQ in hormone- and drug-refractory prostate cancer cells PC-3 and DU-145. METHODS XTT cell proliferation assay was used to assess cytotoxicity; DNA fragmentation and caspase 3/7 activity were also measured. RESULTS The combination of TQ and ZA resulted in a significant synergistic cytotoxic activity and DNA fragmentation when compared to any single agent alone, in a dose- and time-dependent manner. In addition, TQ and ZA combination increased the caspase 3/7 activity in PC-3 cell line, while this activity could not be demonstrated in DU-145 cell line. CONCLUSION TQ and ZA had minimal hematological and non-hematological toxicity profile compared to cytotoxic agents. So, this combination may be an alternative approach for patients who are unable to be treated by conventional treatments because of poor performance status.
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Affiliation(s)
- Ahmed Dirican
- Medical Oncology Clinic, Izmir Katip Celebi University Ataturk Training and Research Hospital, Izmir, Turkey
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Dirican A, Atmaca H, Bozkurt E, Erten C, Karaca B, Uslu R. Novel combination of docetaxel and thymoquinone induces synergistic cytotoxicity and apoptosis in DU-145 human prostate cancer cells by modulating PI3K-AKT pathway. Clin Transl Oncol 2014; 17:145-51. [PMID: 25060568 DOI: 10.1007/s12094-014-1206-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 07/09/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND The treatment of castrate-resistant prostate cancer (CRPC) still remains as an important challenge of daily oncology practice. Docetaxel significantly prolongs overall survival in men with CRPC. Thymoquinone (TQ), one of the flavonoid compounds isolated from Nigealla sativa, has been shown to possess cytotoxic activity against a variety of cancer cell lines. MATERIALS AND METHODS The aim of the study was to investigate the possible synergistic cytotoxic/apoptotic effects of a novel combination, docetaxel and TQ in DU-145 hormone- and drug-refractory prostate cancer cells and their effects on PI3K and ERK signaling pathways. RESULTS We observed that the combination of docetaxel and TQ resulted in a significant synergistic cytotoxicy and apoptosis as compared to any single agent alone, in a dose-dependent manner. It was found that viability of the combination treated cells was not significantly changed in the presence of LY294002 as compared to inhibitor treated cells. However, in the presence of FR180204, viability of combination treated cells was significantly decreased as compared to inhibitor treated cells. In conclusion, cytotoxic effect of the docetaxel and TQ combination is correlated with the block of the PI3K/Akt signaling pathway in DU-145 cells. CONCLUSION Therefore, this combination strategy may be an alternative approach for the challenging era of daily oncologic practice. Also, the combination of docetaxel and TQ might allow a reduction in docetaxel doses and diminish adverse effects of docetaxel while maintaining the therapeutic effect in patients with CRPC.
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Affiliation(s)
- A Dirican
- Department of Medical Oncology, Izmir Katip Celebi University Ataturk Training and Research Hospital, 35360, Izmir, Turkey,
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Karaca B, Bozkurt E, Atmaca H, Surmeli Z, Pinar A, Sanli UA, Uslu R. Effect of trastuzumab/AT-101 combination on apoptosis and cytotoxicity in HER2-positive breast cancer cells: A novel combination to effect resistance to anti-HER2 therapy through inhibition of PI3K signaling. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e13512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Harika Atmaca
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Zeki Surmeli
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Atike Pinar
- Ege University, Division of Medical Oncology, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Ulus Ali Sanli
- Department of Medical Oncology, Ege University, Izmir, Turkey
| | - Ruchan Uslu
- Department of Medical Oncology, Ege University, Izmir, Turkey
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Karaca B, Atmaca H, Bozkurt E, Sezgin C, Karabulut B, Uslu R. Use of docetaxel in combination with octreotide as a synergistic combination for prostate cancer with apoptotic and antiangiogenic effects. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e13515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Harika Atmaca
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Canfeza Sezgin
- Department of Medical Oncology, Ege University, Izmir, Turkey
| | | | - Ruchan Uslu
- Department of Medical Oncology, Ege University, Izmir, Turkey
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Surmeli Z, Bozkurt E, Ozer O, Atmaca H, Kisim A, Uzunoglu S, Uslu R, Karaca B. Enhancement of docetaxel efficacy by zoledronic acid pretreatment in docetaxel-resistant prostate cancer cells (PC-3/R and DU-145/R). J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e16105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Zeki Surmeli
- Department of Medical Oncology, Ege University, Tulay Aktas Oncology Hospital, Izmir, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | | | - Harika Atmaca
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Asli Kisim
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Selim Uzunoglu
- Celal Bayar University, School of Medicine, Department of Medical Biology,, Manisa, Turkey
| | - Ruchan Uslu
- Department of Medical Oncology, Ege University, Izmir, Turkey
| | - Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
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Ayhan H, Durmaz T, Keleş T, Bayram NA, Bilen E, Akçay M, Ersoy R, Bozkurt E. The relationship between acute coronary syndrome and stress hyperglycemia. Exp Clin Endocrinol Diabetes 2014; 122:222-6. [PMID: 24771010 DOI: 10.1055/s-0034-1367002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND OBJECTIVE Hyperglycemia on admission is associated with increased mortality and morbidity in acute coronary syndrome (ACS) irrespective of presence of diabetes mellitus. To the best of our knowledge, no evidence on the relationship between stress hyperglycemia (SH) and the extent of coronary artery disease is found in the literature. Our objective in this study is to assess the relationship of SH with the prognosis of acute coronary syndrome, extent of coronary artery disease (CAD), development of arrhythmia, and major adverse cardiac events. METHOD 89 patients who were hospitalized in the coronary intensive care unit with diagnosis of ACS between January 2010 and June 2010 were enrolled in the study. The patients were separated into 2 groups as having stress hypergly-cemia or not, according to their blood glucose levels on admission. TIMI and GRACE risk scores were obtained and GENSINI scoring was performed to assess CAD extent for all the patients. Major adverse cardiac events (MACE) (death, MI, re-revascularization, stroke) were recorded for all patients while in the hospital and at 1st and 6th months. RESULTS In our study, MACE, GENSINI scores at 6 months and development of in-hospital arrhythmia rates were statistically significantly higher and left ventricular ejection fractions were statistically significantly lower in the group with SH. The association of TIMI, GRACE, GENSINI, New York Heart Association (NYHA) and Killip classifications with blood glucose, fasting blood glucose and HbA1c on admission was confirmed. CONCLUSION Prognostic course happens to be worse and CAD is more extensive in patients with SH. In addition, blood glucose values may have to be estimated lower compared to the samples in the literature, in order to diagnose SH.
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Affiliation(s)
- H Ayhan
- Department of Cardiology, Faculty of Medicine, Yıldırım Beyazıt University
| | - T Durmaz
- Department of Cardiology, Faculty of Medicine, Yıldırım Beyazıt University
| | - T Keleş
- Department of Cardiology, Faculty of Medicine, Yıldırım Beyazıt University
| | - N A Bayram
- Department of Cardiology, Ankara Ataturk Education and Research Hospital
| | - E Bilen
- Department of Cardiology, Ankara Ataturk Education and Research Hospital
| | - M Akçay
- Department of Cardiology, Faculty of Medicine, Yıldırım Beyazıt University
| | - R Ersoy
- Department of Endocrinology, Ankara Ataturk Education and Research Hospital
| | - E Bozkurt
- Department of Cardiology, Faculty of Medicine, Yıldırım Beyazıt University
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Durmaz T, Bayram H, Bayram N, Sari C, Keles T, Bastug S, Bozkurt E. Effect of coronary artery bypass surgery on left ventricular function as assessed by strain and strain rate imaging. Perfusion 2013; 29:425-33. [PMID: 24304544 DOI: 10.1177/0267659113513920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/17/2022]
Abstract
INTRODUCTION This study examined the effect of coronary artery revascularization on left ventricular function and the results of strain imaging for the detection of ischemia before and after coronary artery bypass graft (CABG) surgery. MATERIAL AND METHODS Sixty-eight patients with a history of coronary artery disease (CAD) were included, prospectively. Conventional echocardiography and color tissue Doppler-derived strain-strain rate echocardiographic imaging were performed 24 hours before and 3 months after CABG surgery. RESULTS While strain rate values of the basal septum, middle segment of the lateral wall, middle segment of the inferior wall, and middle and basal segments of the anterior wall were significantly increased, other segments did not change after the operation. The mean systolic strain rate value was significantly increased after the operation. Left ventricle strain values in the middle segment of the septum, middle and basal segments of the inferior wall, and middle and basal segments of the anterior wall were significantly increased after the operation. No significant difference was noted in the basal septum or the middle and basal segments of the lateral wall after the operation. The mean systolic strain value was significantly increased after the operation. CONCLUSION The results of this study suggest that strain and strain rate echocardiography can provide an accurate evaluation of regional contractile function after CABG, even in the segments that are apparently normal.
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Affiliation(s)
- T Durmaz
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - H Bayram
- Department of Cardiovascular Surgery, Ataturk Education and Research Hospital, Ankara, Turkey
| | - Na Bayram
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - C Sari
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - T Keles
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - S Bastug
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - E Bozkurt
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
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Atmaca H, Bozkurt E, Uzunoglu S, Uslu R, Karaca B. A diverse induction of apoptosis by trabectedin in MCF-7 (HER2-/ER+) and MDA-MB-453 (HER2+/ER-) breast cancer cells. Toxicol Lett 2013; 221:128-36. [PMID: 23792433 DOI: 10.1016/j.toxlet.2013.06.213] [Citation(s) in RCA: 28] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/06/2013] [Accepted: 06/12/2013] [Indexed: 11/30/2022]
Abstract
Trabectedin (Yondelis, ET-743), a semi synthetic tetrahydroisoquinoline alkaloid that was originally derived from the marine tunicate Ecteinascidia turbinata. The objective of this study was to investigate whether trabectedin mediated apoptosis shows any diversity in human breast cancer cell lines with different genotypes. Trabectedin induced cytotoxicity and apoptosis in both breast cancer cells in a time and concentration-dependent manner. The expression levels of the death receptor pathway molecules, TRAIL-R1/DR4, TRAIL-R2/DR5, FAS/TNFRSF6, TNF RI/TNFRSF1A, and FADD were significantly increased by 2.6-, 3.1-, 1.7-, 11.2- and 4.0-fold by trabectedin treatment in MCF-7 cells. However, in MDA-MB-453 cells, the mitochondrial pathway related pro-apoptotic proteins Bax, Bad, Cytochrome c, Smac/DIABLO, and Cleaved Caspase-3 expressions were induced by 4.2-, 3.6-, 4.8-, 4.5-, and 4.4-fold, and the expression levels of anti-apoptotic proteins Bcl-2 and Bcl-XL were reduced by 4.8- and 5.2-fold in MDA-MB-453 cells. Moreover, trabectedin treatment increased the generation of ROS in both breast cancer cells. We have shown that trabectedin causes selective activation of extrinsic and intrinsic apoptotic pathways in two genotypically different breast cancer cells. This preliminary data might guide clinicians to choose appropriate combination agents with trabectedin based on different molecular subtypes of breast cancer.
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Affiliation(s)
- Harika Atmaca
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey.
| | - Emir Bozkurt
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey
| | - Selim Uzunoglu
- Section of Molecular Biology, Department of Biology, Faculty of Science and Letters, Celal Bayar University, 45140 Muradiye, Manisa, Turkey
| | - Ruchan Uslu
- Division of Medical Oncology, Tulay Aktas Oncology Hospital, School of Medicine, Ege University, 35100 Bornova, Izmir, Turkey
| | - Burcak Karaca
- Division of Medical Oncology, Tulay Aktas Oncology Hospital, School of Medicine, Ege University, 35100 Bornova, Izmir, Turkey
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Atmaca H, Bozkurt E, Cakar B, Surmeli ZG, Uzunoglu S, Uslu R, Karaca B. Trabectedin to induce mitochondrial membrane potential dissipation and reactive oxygen species generation in breast cancer cells. J Clin Oncol 2013. [DOI: 10.1200/jco.2013.31.15_suppl.e13580] [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
e13580 Background: Trabectedin (Yondelis; ET-743) is a tetrahydroisoquinoline alkaloid that was originally derived from the marine tunicate Ecteinascidia turbinata and is currently prepared synthetically. It ıs currently used for the treatment of soft tissue sarcomas. It has been shown that Trabectedin provides the production of superoxides near the DNA strand, resulting in DNA backbone cleavage and cell apoptosis, however the apoptotic mechanisms of Trabectedin is still very limited. The objective of this study is to investigate the underlying mechanisms of apoptosis Trabectedin in two human breast cancer cell lines (MDA-MB-231 and MDA-MB-453) and one human immortalized non-transformed breast epithelial cell line (MCF-10A), to see if similar oxidation processes take place in breast cancer. Methods: Cytotoxicity was assessed by XTT cell viability assay. Apoptosis was shown by measuring DNA fragmentation, caspase 3/7 activation. Mitochondrial membrane potential (MMP) was evaluated by TMRE dye. Measurement of reactive oxygen species (ROS) was done by using Glutathione S-Transferase (GST) Assay Kit and CM-H2DCFDA dye. Results: Trabectedin induced the cytotoxicity in breast cancer cells in a time and dose dependent manner. Moreover, it increased DNA fragmentation and the MMP dissipation in tested breast cancer cells. The levels of ROS production in parallel with GST enzyme activity were sharply increased by Trabectedin treatment. Conclusions: This is the first study to investigate the role of Trabectedin activity and mechanisms of apoptosis in human breast cancer cells. These preliminary results might show us a way to use Trabectedin alone, or in combination for breast cancer treatment in near future.
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Affiliation(s)
- Harika Atmaca
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Burcu Cakar
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Zeki Gokhan Surmeli
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Selim Uzunoglu
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Ruchan Uslu
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
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Abstract
e11501 Background: HER2 is a member of the human epidermal growth factor (EGF) receptor family that is blocked by a monoclonal antibody, Trastuzumab (Herceptin). In daily clinical practice, Trastuzumab is being used concurrently with radiotherapy (RT) in breast cancer patients. Administration of Trastuzumab with RT appear to be safe in regard to cardiac morbidity and mortality in patients with relatively modest follow-up duration (less than 5 years). In this study we aimed to determine the possible interactions between RT and Trastuzumab in HER2 positive breast cancer cell line MDA-MB-453. Methods: MDA-MB-453 cells were treated with increased dose of Trastuzumab (10 – 200 µg/mL, 72 hours) and irradiation (0-8 Gy, 4 Gy/min, 48 hours). XTT (Roche) viability assay was used to measure the cytotoxicity of Trastuzumab, and trypan blue method was used to measure the cytotoxicity of irradiation. The sensitization of MDA-MB-453 cell lines was done by IC50 of Trastuzumab with 24 hours treatment followed by 6 and 8 Gy irradiation. Results: Cytotoxicity was increased in a dose and time dependent manner by Trastuzumab and irradiation treatment in MDA-MB-453 cell lines. IC50 values of Trastuzumab and irradiation were found to be 167 µg/mL and 8 Gy, at 48 hours, respectively.Cells were pretreated with IC25 and IC50 doses of Trastuzumab for 24 hours and then irradiated with 6 and 8 Gy doses. The cell viability at 24 and 48 hours were significantly decreased (p=0.0012) compared to single exposures (Trastuzumab or irradiation), indicating that Trastuzumab sensitizes HER2 positive breast cancer cells to irradiation. Conclusions: This preliminary study showed the sensitization effect of Trastuzumab to irradiation in HER2 positive breast cancer cells. Further studies are warranted for the optimal dosing and normal tissue toxicity of this combination.
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Affiliation(s)
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Hilmi Alanyali
- Dokuz Eylul TIp Fakultesi Radyasyon Onkolojisi, Izmir, Turkey
| | - Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Ruchan Uslu
- Department of Medical Oncology, Ege University, Izmir, Turkey
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Cakar B, Gursoy P, Atmaca H, Kisim A, Bozkurt E, Uzunoglu S, Sezgin C, Sanli UA, Karabulut B, Uslu R, Karaca B. Paclitaxel in combination with AT-101 induces apoptosis via supressing Bcl-2, bcl-XL, mcl-1 proteins in human breast cancer cells. J Clin Oncol 2013. [DOI: 10.1200/jco.2013.31.15_suppl.e13578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
e13578 Background: Paclitaxel, a microtubule stabilizing agent, has been a standard of care for breast cancer. AT-101, is an -/- enantiomer of gossypol, inhibits the Bcl-2 family proteins which contain BH3 domain. We reported previously that Paclitaxel in combination with AT-101 showed strong synergistic cytotoxic and apoptotic effects in human breast cancer cells. In this study, to elucidate the molecular mechanisms involved in the apoptotic effect of AT-101/Paclitaxel combination treatment in breast cancer cells, we investigated the possible roles of anti-apoptotic Bcl-2, Bcl-XL and Mcl-1 proteins which contain BH3 domain. Involvement of caspase 3 and 7 activation was also investigated. Methods: Human breast cancer cells were treated with increasing concentrations of drugs alone or with the synergistic combination doses of AT-101 and Paclitaxel. Cell Death Detection Elisa Plus Kit (Roche) was used to detect apoptosis. Caspase 3/7 activity was evaluated by Caspase-Glo 3/7 (Promega, Madison, WI) kit. Changes in the mRNA levels of Bcl-2, Bcl-XL and Mcl-1 genes were evaluated by qRT-PCR. Expression levels of these proteins were also investigated by Western blot analysis. Results: Combined treatment was shown to have strong synergistic apoptotic effects in MCF-7 and MDA- MB-231 human breast cancer cells. mRNA levels of Bcl-2, Bcl-XL and Mcl-1 molecules were reduced by the combination treatment in both cell lines. In parallel with mRNA levels, Bcl-2, Bcl-XL and Mcl-1 protein levels were significantly reduced after this novel drug combination. Combined treatment also induced caspase 3/7 activation in breast cancer cells. Conclusions: These preliminary data suggest that anti-apoptotic proteins such as Bcl-2, Bcl-XL and Mcl-1 may play important role in the underlying mechanistic rationale of apoptotic effect of AT-101/paclitaxel combination, while pro-apoptotic Bcl-2 related genes (Caspase-3 and Caspase-7) also seem to regulate this synergistic interaction.
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Affiliation(s)
- Burcu Cakar
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Pinar Gursoy
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Harika Atmaca
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Asli Kisim
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Emir Bozkurt
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Selim Uzunoglu
- Molecular Biology Department, Faculty of Science and Letters, Celal Bayar University, Manisa, Turkey
| | - Canfeza Sezgin
- Department of Medical Oncology, Ege University, Izmir, Turkey
| | - Ulus Ali Sanli
- Department of Medical Oncology, Ege University, Izmir, Turkey
| | | | - Ruchan Uslu
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
| | - Burcak Karaca
- Ege University, Tulay Aktas Oncology Hospital, School of Medicine, Izmir, Turkey
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Bozkurt E, Atmaca H, Kisim A, Uzunoglu S, Uslu R, Karaca B. Effects of Thymus serpyllum extract on cell proliferation, apoptosis and epigenetic events in human breast cancer cells. Nutr Cancer 2013; 64:1245-50. [PMID: 23163852 DOI: 10.1080/01635581.2012.719658] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Thymus (T.) serpyllum (wild thyme) is an aromatic medicinal plant due to its several biological properties, including anticancer activity. Breast cancer is one of the most common malignancies and increasing evidence supports that it is not only a genetic but also an epigenetic disease. Epigenetics investigates changes in gene expression caused by mechanisms that do not involve alterations in DNA sequence. DNA methylation and histone acetylation are the most widely studied epigenetic changes in cancer cells. This study evaluated the effects of T. serpyllum on apoptosis and epigenetic events in breast cancer cells. XTT cell viability assay was used to determine cytotoxicity. DNA fragmentation and caspase 3/7 activity assays were used in the assesment of apoptosis. DNA methyltransferase (DNMT) and histone deacetylase (HDAC) activities were evaluated by ELISA and verified by qRT-PCR. T. serpyllum extract induced significant cytotoxicity in breast cancer cells (MCF-7 and MDA-MB-231) but not in normal cells. It also induced apoptosis and inhibited the DNMT and HDAC activities in MDA-MB-231 cells. In the present study, the first preliminary data on the effects of the methanolic extract of T. serpyllum in normal and breast cancer cells were obtained and suggest that T. serpyllum may be a promising candidate in the development of novel therapeutic drugs for breast cancer treatment.
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Affiliation(s)
- Emir Bozkurt
- Department of Biology, Faculty of Science and Arts, Celal Bayar University, Manisa, Turkey
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Cakar B, Bulut G, Kisim A, Bozkurt E, Atmaca H, Uzunoglu S, Uslu R, Karaca B. AT-101 (-/- Gossypol) in Combination with Trastuzumab Triggers Apoptosis Through Inhibiting BCL-2, BCL-XL AND MCL-1 Protein Levels in Human HER2-Positive Breast Cancer Cells. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt086.1] [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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Akçay M, Sari C, Durmaz T, Keles T, Ozen M, Bayram N, Bilen E, Ayhan H, Kasapkara H, Bozkurt E. Transfemoral balloon expandable aortic valve implantation in a patient with myelodysplastic syndrome. Perfusion 2013; 28:409-11. [PMID: 23563894 DOI: 10.1177/0267659113483801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 11/16/2022]
Abstract
In this case presentation, the transcatheter aortic valve implantation (TAVI) intervention successfully performed on a 76-year-old male patient with severe degenerative aortic stenosis and diagnosed with myelodysplastic syndrome (MDS) is discussed. This case presentation represents the first case on the treatment of severe aortic stenosis on a patient with myelodysplastic syndrome through the use of the TAVI method and may form an alternative to surgery in patients with severe aortic stenosis who have a known haematological disease. For a successful procedure, the patient must be evaluated in cooperation with the haematology clinic and all necessary precautions regarding bleeding and infection complications of the patient must be taken prior to the procedure.
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Affiliation(s)
- M Akçay
- Yıldırım Beyazıt University, Cardiology Department, Ankara, Turkey
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Robichon C, Annereau JP, Gomes B, Pillon A, de Vries L, Cussac D, Meyer N, Lamant L, Kruczynski A, Guilbaud N, Kluza J, Jendoubi M, Corazao-Rozas P, Andre F, Jonneaux A, Guerreschi P, Formstecher P, Mortier L, Marchetti PHI, Bozkurt E, Atmaca H, Uzunoglu S, Uslu R, Karaca B, Erenpreisa J, Jackson TR, Huna A, Salmina K, Innashkina I, Jankevics E, Townsend PA, Cragg MS, Atmaca H, Bozkurt E, Uzunoglu S, Uslu R, Karaca B, Ramos SP, Bin M, Neto MDS, Curvello R, de Souza ACS, Nunes M, Weiswald LB, Vrignaud P, Vacher S, Turlotte E, Richon S, Roman-Roman S, Bieche I, Dangles-Marie V, Morais-Santos F, Pinheiro C, Vieira A, Schmitt F, Paredes J, Baltazar F, Zhang T, Lee YW, Rui YF, Cheng TY, Li G, Sreelatha KH, Reshma RS, Veena S, Rakesh SN, Thara S, Jem P, Priya S, Veena S, Sreelatha KH, Reshma RS, Rakesh SN, Priya S. Poster session 5. Translational research. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047] [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: 11/14/2022] Open
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Bozkurt E, Atmaca H, Uzunoglu S, Uslu R, Karaca B. P53 Modulates Trabectedin Mediated Cytotoxicity in Glioblastoma Multiforme Cells (U-87MG and T98G). Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047.3] [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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Atmaca H, Bozkurt E, Uzunoglu S, Uslu R, Karaca B. A Diverse Induction of Apoptosis by Trabectedin in MCF-7 (HER2-/ER+) and MDA-MB-453 (HER2 + /ER-) Breast Cancer Cells. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047.5] [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: 11/13/2022] Open
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Satiroglu O, Bostan M, Uzun H, Cetin M, Bozkurt E. Severity of coronary artery disease and prostate-specific antigen relationship in men. Eur Rev Med Pharmacol Sci 2012; 16:2078-2081. [PMID: 23280022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE Prostate-specific antigen (PSA) is a well-known prostate cancer marker. Recent studies have shown that serum PSA levels can fluctuate in response to cardiovascular stress. In this study we aimed to determine if serum PSA levels correlate with the presence and stages of coronary artery disease (CAD) and whether PSA can be used as a marker for the diagnosis and severity of CAD. PATIENTS AND METHODS This was a retrospective chart review of male patients who underwent coronary angiography for suspected CAD. A total of 100 patients with angiographic data and baseline serum PSA measurements were included. Patients with previous history of coronary angiography, stent implantation, benign prostate hypertrophy, known prostate cancer or prostatitis were excluded. RESULTS The mean age was 57±10 years. Coronary angiography results were normal in 13%, non-obstructive CAD (non-critical plaque formation) in 16%, one-vessel disease in 21%, two-vessel disease in 30% and multi-vessel disease in 20%. Mean values of total and free serum PSA were 1.4±1.3 ng/mL and 0.4±0.4 ng/mL, respectively. Although there was an increasing trend of PSA with more advanced stages of CAD, no significant relationship was established (p > 0.05). Patients with hypertension had significantly elevated total and free serum PSA compared to normotensives. There is no comparison of PSA levels between patients with CAD and without CAD. CONCLUSIONS Our study suggests that there is no direct relationship between increasing levels of PSA and stage of CAD. Thus, PSA level does not appear to be a suitable marker for diagnosis or severity of CAD.
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Affiliation(s)
- O Satiroglu
- Department of Cardiology, Rize University Faculty of Medicine, Rize, Turkey.
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Bozkurt E, Acar M, Meral K, Arık M, Onganer Y. Photoinduced interactions between coumarin 151 and colloidal CdS nanoparticles in aqueous suspension. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.03.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Karaca B, Atmaca H, Asli K, Bozkurt E, Cakar B, Surmeli Z, Gursoy P, Karabulut B, Uzunoglu S, Sezgin C. 94P Comparison of A Novel, Label-Free, and Real-Time cell Based System (Xcelligence) With a Conventional Viability Assay (Xtt) to Determine the Anti-Proliferative Effect of At-101 in Human Breast Cancer Cells. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(19)65737-6] [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: 10/25/2022] Open
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Bilen E, Akdi A, Tanboga I, Kurt M, Koçak U, Keleş T, Bozkurt E. PP-215 ASSOCIATION OF ADMISSION MEAN PLATELET VOLUME WITH INFARCT RELATED CORONARY ARTERY PATENCY IN PATIENTS WITH ST SEGMENT ELEVATION MYOCARDIAL INFARCTION. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70415-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Durmaz T, Keles T, Ayhan H, Cay N, Bilen E, Bayram N, Akcay M, Bozkurt E. OP-074 THE ASSOCIATION BETWEEN PARAOXONASE ACTIVITY AND AORTIC STIFFNESS PARAMETERS. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70037-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bilen E, Tanboga I, Kurt M, Kocak U, Ayhan H, Keleş T, Bozkurt E. PP-038 MEAN PLATELET VOLUME IS INCREASED IN PATIENTS WITH MYOCARDIAL BRIDGE. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70271-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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