1
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Ozyerli-Goknar E, Kala EY, Aksu AC, Bulut I, Cingöz A, Nizamuddin S, Biniossek M, Seker-Polat F, Morova T, Aztekin C, Kung SHY, Syed H, Tuncbag N, Gönen M, Philpott M, Cribbs AP, Acilan C, Lack NA, Onder TT, Timmers HTM, Bagci-Onder T. Epigenetic-focused CRISPR/Cas9 screen identifies (absent, small, or homeotic)2-like protein (ASH2L) as a regulator of glioblastoma cell survival. Cell Commun Signal 2023; 21:328. [PMID: 37974198 PMCID: PMC10652464 DOI: 10.1186/s12964-023-01335-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/26/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Glioblastoma is the most common and aggressive primary brain tumor with extremely poor prognosis, highlighting an urgent need for developing novel treatment options. Identifying epigenetic vulnerabilities of cancer cells can provide excellent therapeutic intervention points for various types of cancers. METHOD In this study, we investigated epigenetic regulators of glioblastoma cell survival through CRISPR/Cas9 based genetic ablation screens using a customized sgRNA library EpiDoKOL, which targets critical functional domains of chromatin modifiers. RESULTS Screens conducted in multiple cell lines revealed ASH2L, a histone lysine methyltransferase complex subunit, as a major regulator of glioblastoma cell viability. ASH2L depletion led to cell cycle arrest and apoptosis. RNA sequencing and greenCUT&RUN together identified a set of cell cycle regulatory genes, such as TRA2B, BARD1, KIF20B, ARID4A and SMARCC1 that were downregulated upon ASH2L depletion. Mass spectrometry analysis revealed the interaction partners of ASH2L in glioblastoma cell lines as SET1/MLL family members including SETD1A, SETD1B, MLL1 and MLL2. We further showed that glioblastoma cells had a differential dependency on expression of SET1/MLL family members for survival. The growth of ASH2L-depleted glioblastoma cells was markedly slower than controls in orthotopic in vivo models. TCGA analysis showed high ASH2L expression in glioblastoma compared to low grade gliomas and immunohistochemical analysis revealed significant ASH2L expression in glioblastoma tissues, attesting to its clinical relevance. Therefore, high throughput, robust and affordable screens with focused libraries, such as EpiDoKOL, holds great promise to enable rapid discovery of novel epigenetic regulators of cancer cell survival, such as ASH2L. CONCLUSION Together, we suggest that targeting ASH2L could serve as a new therapeutic opportunity for glioblastoma. Video Abstract.
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Affiliation(s)
- Ezgi Ozyerli-Goknar
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK) Partner Site Freiburg, Heidelberg, Germany
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
| | - Ezgi Yagmur Kala
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
| | - Ali Cenk Aksu
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
| | - Ipek Bulut
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
| | - Ahmet Cingöz
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
| | - Sheikh Nizamuddin
- German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK) Partner Site Freiburg, Heidelberg, Germany
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
| | - Martin Biniossek
- Institute for Molecular Medicine and Cell Research, University of Freiburg, Freiburg, Germany
| | - Fidan Seker-Polat
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
| | - Tunc Morova
- Koç University School of Medicine, Istanbul, Türkiye
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Can Aztekin
- Koç University School of Medicine, Istanbul, Türkiye
| | - Sonia H Y Kung
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Hamzah Syed
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
- Biostatistics, Bioinformatics and Data Management Lab, KUTTAM, Istanbul, Türkiye
| | - Nurcan Tuncbag
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
- Department of Chemical and Biological Engineering, Koç University, Istanbul, Türkiye
| | - Mehmet Gönen
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
- Department of Industrial Engineering, Koç University, Istanbul, Türkiye
| | - Martin Philpott
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Adam P Cribbs
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Ceyda Acilan
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
| | - Nathan A Lack
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Tamer T Onder
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
| | - H T Marc Timmers
- German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK) Partner Site Freiburg, Heidelberg, Germany
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
| | - Tugba Bagci-Onder
- Koç University Research Center for Translational Medicine (KUTTAM), Rumelifeneri Yolu, Sarıyer, Istanbul, 34450, Türkiye.
- Koç University School of Medicine, Istanbul, Türkiye.
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2
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Yedier-Bayram O, Gokbayrak B, Kayabolen A, Aksu AC, Cavga AD, Cingöz A, Kala EY, Karabiyik G, Günsay R, Esin B, Morova T, Uyulur F, Syed H, Philpott M, Cribbs AP, Kung SHY, Lack NA, Onder TT, Bagci-Onder T. EPIKOL, a chromatin-focused CRISPR/Cas9-based screening platform, to identify cancer-specific epigenetic vulnerabilities. Cell Death Dis 2022; 13:710. [PMID: 35973998 PMCID: PMC9381743 DOI: 10.1038/s41419-022-05146-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/24/2022] [Accepted: 07/28/2022] [Indexed: 01/21/2023]
Abstract
Dysregulation of the epigenome due to alterations in chromatin modifier proteins commonly contribute to malignant transformation. To interrogate the roles of epigenetic modifiers in cancer cells, we generated an epigenome-wide CRISPR-Cas9 knockout library (EPIKOL) that targets a wide-range of epigenetic modifiers and their cofactors. We conducted eight screens in two different cancer types and showed that EPIKOL performs with high efficiency in terms of sgRNA distribution and depletion of essential genes. We discovered novel epigenetic modifiers that regulate triple-negative breast cancer (TNBC) and prostate cancer cell fitness. We confirmed the growth-regulatory functions of individual candidates, including SS18L2 and members of the NSL complex (KANSL2, KANSL3, KAT8) in TNBC cells. Overall, we show that EPIKOL, a focused sgRNA library targeting ~800 genes, can reveal epigenetic modifiers that are essential for cancer cell fitness under in vitro and in vivo conditions and enable the identification of novel anti-cancer targets. Due to its comprehensive epigenome-wide targets and relatively high number of sgRNAs per gene, EPIKOL will facilitate studies examining functional roles of epigenetic modifiers in a wide range of contexts, such as screens in primary cells, patient-derived xenografts as well as in vivo models.
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Affiliation(s)
- Ozlem Yedier-Bayram
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Bengul Gokbayrak
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Alisan Kayabolen
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Ali Cenk Aksu
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Ayse Derya Cavga
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
- Biostatistics, Bioinformatics and Data Management Core, KUTTAM, Istanbul, Türkiye
| | - Ahmet Cingöz
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Ezgi Yagmur Kala
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Goktug Karabiyik
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Rauf Günsay
- Koç University School of Medicine, Istanbul, Türkiye
| | - Beril Esin
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
| | - Tunc Morova
- Koç University School of Medicine, Istanbul, Türkiye
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Fırat Uyulur
- Koç University Department of Computational Biology, Istanbul, Türkiye
| | - Hamzah Syed
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
- Biostatistics, Bioinformatics and Data Management Core, KUTTAM, Istanbul, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
| | - Martin Philpott
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Adam P Cribbs
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Sonia H Y Kung
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Nathan A Lack
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Tamer T Onder
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye.
- Koç University School of Medicine, Istanbul, Türkiye.
| | - Tugba Bagci-Onder
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Türkiye.
- Koç University School of Medicine, Istanbul, Türkiye.
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3
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Senbabaoglu F, Aksu AC, Cingoz A, Seker-Polat F, Borklu-Yucel E, Solaroglu İ, Bagci-Onder T. Drug Repositioning Screen on a New Primary Cell Line Identifies Potent Therapeutics for Glioblastoma. Front Neurosci 2021; 14:578316. [PMID: 33390879 PMCID: PMC7773901 DOI: 10.3389/fnins.2020.578316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/30/2020] [Accepted: 11/18/2020] [Indexed: 12/15/2022] Open
Abstract
Glioblastoma is a malignant brain cancer with limited treatment options and high mortality rate. While established glioblastoma cell line models provide valuable information, they ultimately lose most primary characteristics of tumors under long-term serum culture conditions. Therefore, established cell lines do not necessarily recapitulate genetic and morphological characteristics of real tumors. In this study, in line with the growing interest in using primary cell line models derived from patient tissue, we generated a primary glioblastoma cell line, KUGBM8 and characterized its genetic alterations, long term growth ability, tumor formation capacity and its response to Temozolomide, the front-line chemotherapy utilized clinically. In addition, we performed a drug repurposing screen on the KUGBM8 cell line to identify FDA-approved agents that can be incorporated into glioblastoma treatment regimen and identified Topotecan as a lead drug among 1,200 drugs. We showed Topotecan can induce cell death in KUGBM8 and other primary cell lines and cooperate with Temozolomide in low dosage combinations. Together, our study provides a new primary cell line model that can be suitable for both in vitro and in vivo studies and suggests that Topotecan can offer promise as a therapeutic approach for glioblastoma.
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Affiliation(s)
- Filiz Senbabaoglu
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul, Turkey.,Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Ali Cenk Aksu
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul, Turkey.,Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Ahmet Cingoz
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul, Turkey.,Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Fidan Seker-Polat
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul, Turkey.,Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Esra Borklu-Yucel
- Medical Genetics Department and Diagnostic Center for Genetic Diseases, Koç University Hospital, Istanbul, Turkey
| | - İhsan Solaroglu
- Koç University Research Center for Translational Medicine, Istanbul, Turkey.,Department of Neurosurgery, Koç University School of Medicine, Istanbul, Turkey.,Department of Basic Sciences, Loma Linda University, Loma Linda, CA, United States
| | - Tugba Bagci-Onder
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul, Turkey.,Koç University Research Center for Translational Medicine, Istanbul, Turkey
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4
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Mustafa A, Eser A, Aksu AC, Kiraz A, Tanyeri M, Erten A, Yalcin O. A micropillar-based microfluidic viscometer for Newtonian and non-Newtonian fluids. Anal Chim Acta 2020; 1135:107-115. [PMID: 33070846 DOI: 10.1016/j.aca.2020.07.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 11/27/2019] [Revised: 05/30/2020] [Accepted: 07/15/2020] [Indexed: 11/17/2022]
Abstract
In this study, a novel viscosity measurement technique based on measuring the deflection of flexible (poly) dimethylsiloxane (PDMS) micropillars is presented. The experimental results show a nonlinear relationship between fluid viscosity and the deflection of micropillars due to viscoelastic properties of PDMS. A calibration curve, demonstrating this nonlinear relationship, is generated, and used to determine the viscosity of an unknown fluid. Using our method, viscosity measurements for Newtonian fluids (glycerol/water solutions) can be performed within 2-100 cP at shear rates γ = 60.5-398.4 s-1. We also measured viscosity of human whole blood samples (non-Newtonian fluid) yielding 2.7-5.1 cP at shear rates γ = 120-345.1 s-1, which compares well with measurements using conventional rotational viscometers (3.6-5.7 cP). With a sensitivity better than 0.5 cP, this method has the potential to be used as a portable microfluidic viscometer for real-time rheological studies.
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Affiliation(s)
- Adil Mustafa
- Graduate School of Biomedical Sciences and Engineering Koç University, Istanbul, Turkey; Department of Physics, Koç University, Istanbul, Turkey
| | - Aysenur Eser
- Graduate School of Biomedical Sciences and Engineering Koç University, Istanbul, Turkey
| | - Ali Cenk Aksu
- Graduate School of Biomedical Sciences and Engineering Koç University, Istanbul, Turkey
| | - Alper Kiraz
- Department of Physics, Koç University, Istanbul, Turkey; Department of Electrical Engineering Koç University, Istanbul, Turkey.
| | - Melikhan Tanyeri
- Department of Engineering, Duquesne University, Pittsburgh, USA.
| | - Ahmet Erten
- Department of Electronics and Communication Engineering, Istanbul Technical University, Istanbul, Turkey.
| | - Ozlem Yalcin
- Research Center for Translational Medicine, School of Medicine, Koç University, Istanbul, Turkey.
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5
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Ugurel E, Piskin S, Aksu AC, Eser A, Yalcin O. From Experiments to Simulation: Shear-Induced Responses of Red Blood Cells to Different Oxygen Saturation Levels. Front Physiol 2020; 10:1559. [PMID: 32038272 PMCID: PMC6987081 DOI: 10.3389/fphys.2019.01559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 06/20/2019] [Accepted: 12/11/2019] [Indexed: 11/13/2022] Open
Abstract
Red blood cells (RBC) carry and deliver oxygen (O2) to peripheral tissues through different microcirculatory regions where they are exposed to various levels of shear stress (SS). O2 affinity of hemoglobin (Hb) decreases as the blood enters the microcirculation. This phenomenon determines Hb interactions with RBC membrane proteins that can further regulate the structure of cytoskeleton and affect the mechanical properties of cells. The goal of this study is to evaluate shear-induced RBC deformability and simulate RBC dynamics in blood flow under oxygenated and deoxygenated conditions. Venous blood samples from healthy donors were oxygenated with ambient air or deoxygenated with 100% nitrogen gas for 10 min and immediately applied into an ektacytometer (LORRCA). RBC deformability was measured before and after the application of continuous 5 Pa SS for 300 s by LORRCA and recorded as elongation index (EI) values. A computational model was generated for the simulation of blood flow in a real carotid artery section. EI distribution throughout the artery and its relationships with velocity, pressure, wall SS and viscosity were determined by computational tools. RBC deformability significantly increased in deoxygenation compared to oxygenated state both before and after 5 Pa SS implementation (p < 0.0001). However, EI values after continuous SS were not significant at higher SS levels (>5.15 Pa) in deoxygenated condition. Simulation results revealed that the velocity gradient dominates the generation of SS and the shear thinning effect of blood has a minor effect on it. Distribution of EI was calculated during oxygenation/deoxygenation which is 5-10 times higher around the vessel wall compared to the center of the lumen for sections of the pulsatile flow profile. The extent of RBC deformability increases as RBCs approach to the vessel wall in a real 3D artery model and this increment is higher for deoxygenated condition compared to the oxygenated state. Hypoxia significantly increases shear-induced RBC deformability. RBCs could regulate their own mechanical properties in blood flow by increasing their deformability in hypoxic conditions. Computational tools can be applied for defining hypoxia-mediated RBC deformability changes to monitor blood flow in hypoxic tissues.
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Affiliation(s)
- Elif Ugurel
- Department of Physiology, School of Medicine, Koç University, Istanbul, Turkey.,Research Center for Translational Medicine (KUTTAM), Koç University, Istanbul, Turkey
| | - Senol Piskin
- Department of Mechanical Engineering, Istinye University, Istanbul, Turkey.,Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, TX, United States
| | - Ali Cenk Aksu
- Department of Physiology, School of Medicine, Koç University, Istanbul, Turkey.,Research Center for Translational Medicine (KUTTAM), Koç University, Istanbul, Turkey
| | - Aysenur Eser
- Research Center for Translational Medicine (KUTTAM), Koç University, Istanbul, Turkey.,Graduate School of Biomedical Sciences and Engineering, Koç University, Istanbul, Turkey
| | - Ozlem Yalcin
- Department of Physiology, School of Medicine, Koç University, Istanbul, Turkey.,Research Center for Translational Medicine (KUTTAM), Koç University, Istanbul, Turkey
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Ugurel E, Connes P, Yavas G, Eglenen B, Turkay M, Aksu AC, Renoux C, Joly P, Gauthier A, Hot A, Bertrand Y, Cannas G, Yalcin O. Differential effects of adenylyl cyclase-protein kinase A cascade on shear-induced changes of sickle cell deformability. Clin Hemorheol Microcirc 2020; 73:531-543. [DOI: 10.3233/ch-190563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Elif Ugurel
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
| | - Philippe Connes
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Team « Vascular Biology and Red Blood Cell », Université Claude Bernard Lyon 1, Lyon, France
- Laboratoire d’Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
- Institut Universitaire de France (IUF), Paris, France
| | - Gokce Yavas
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
| | - Buse Eglenen
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
| | - Mine Turkay
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
| | - Ali Cenk Aksu
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
| | - Celine Renoux
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Team « Vascular Biology and Red Blood Cell », Université Claude Bernard Lyon 1, Lyon, France
- Laboratoire d’Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
- UF de biochimie des pathologies érythrocytaires, Centre de Biologie Est, Hospices Civils de Lyon, Lyon, France
| | - Philippe Joly
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Team « Vascular Biology and Red Blood Cell », Université Claude Bernard Lyon 1, Lyon, France
- Laboratoire d’Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
- UF de biochimie des pathologies érythrocytaires, Centre de Biologie Est, Hospices Civils de Lyon, Lyon, France
| | - Alexandra Gauthier
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Team « Vascular Biology and Red Blood Cell », Université Claude Bernard Lyon 1, Lyon, France
- Laboratoire d’Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
- Institut d’hématologie et d’oncologie pédiatrique (IHOP), Hospices Civils de Lyon, Lyon, France
| | - Arnaud Hot
- Clinique de Médecine Ambulatoire/Hématologie Hôpital Edouard Herriot, Lyon, Lyon, France
| | - Yves Bertrand
- Institut d’hématologie et d’oncologie pédiatrique (IHOP), Hospices Civils de Lyon, Lyon, France
| | - Giovanna Cannas
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Team « Vascular Biology and Red Blood Cell », Université Claude Bernard Lyon 1, Lyon, France
- Laboratoire d’Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
- Clinique de Médecine Ambulatoire/Hématologie Hôpital Edouard Herriot, Lyon, Lyon, France
| | - Ozlem Yalcin
- Department of Physiology, Koç University School of Medicine, Sariyer, Istanbul, Turkey
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Cirrik S, Ugurel E, Aksu AC, Oronsky B, Cabrales P, Yalcin O. Nitrite may serve as a combination partner and a biomarker for the anti-cancer activity of RRx-001. Biorheology 2019; 56:221-235. [DOI: 10.3233/bir-190213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Elif Ugurel
- Koc University School of Medicine, , , Turkey
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Sur-Erdem I, Hussain MS, Asif M, Pınarbası N, Aksu AC, Noegel AA. Nesprin-1 impact on tumorigenic cell phenotypes. Mol Biol Rep 2019; 47:921-934. [PMID: 31741263 DOI: 10.1007/s11033-019-05184-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 11/07/2019] [Indexed: 12/24/2022]
Abstract
The largest protein of the nuclear envelope (NE) is Nesprin-1 which forms a network along the NE interacting with actin, Emerin, Lamin, and SUN proteins. Mutations in the SYNE1 gene and reduction in Nesprin-1 protein levels have been reported to correlate with several age related diseases and cancer. In the present study, we tested whether Nesprin-1 overexpression can reverse the malignant phenotype of Huh7 cells, a human liver cancer cell line, which carries a mutation in the SYNE1 gene resulting in reduced Nesprin-1 protein levels, has altered nuclear shape, altered amounts and localization of NE components, centrosome localization and genome stability. Ectopic expression of a mini-Nesprin-1 led to an improvement of the nuclear shape, corrected the mislocalization of NE proteins, the centrosome positioning, and the alterations in the DNA damage response network. Additionally, Nesprin-1 had a profound effect on cellular senescence. These findings suggest that Nesprin-1 may be effective in tumorigenic cell phenotype correction of human liver cancer.
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Affiliation(s)
- Ilknur Sur-Erdem
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany. .,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany. .,Koç University School of Medicine, 34450, Istanbul, Turkey. .,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey.
| | - Muhammed Sajid Hussain
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Maria Asif
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Nareg Pınarbası
- Koç University School of Medicine, 34450, Istanbul, Turkey.,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Ali Cenk Aksu
- Koç University School of Medicine, 34450, Istanbul, Turkey.,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Angelika A Noegel
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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Ünlü A, Yılmaz S, Yalçın Ö, Uyanık M, Petrone P, Çetinkaya RA, Eker İ, Urkan M, Özgürtaş T, Avcı İY, Zeybek N, Aksu AC. Bringing Packed Red Blood Cells to the Point of Combat Injury: Are We There Yet? Turk J Haematol 2018; 35:185-191. [PMID: 29806595 PMCID: PMC6110438 DOI: 10.4274/tjh.2018.0081] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/28/2018] [Indexed: 12/01/2022] Open
Abstract
Objective Hemorrhage is the leading cause of injury-related prehospital mortality. We investigated worst-case scenarios and possible requirements of the Turkish military. As we plan to use blood resources during casualty transport, the impact of transport-related mechanical stress on packed red blood cells (PRBCs) was analyzed. Materials and Methods The in vitro experiment was performed in the environmental test laboratories of ASELSAN®. Operational vibrations of potential casualty transport mediums such as Sikorsky helicopters, Kirpi® armored vehicles, and the NATO vibration standard MIL-STD-810G software program were recorded. The most powerful mechanical stress, which was created by the NATO standard, was applied to 15 units of fresh (≤7 days) and 10 units of old (>7 days) PRBCs in a blood cooler box. The vibrations were simulated with a TDS v895 Medium-Force Shaker Device. On-site blood samples were analyzed at 0, 6, and 24 h for biochemical and biomechanical analyses. Results The mean (±standard deviation) age of fresh and old PRBCs was 4.9±2.2 and 32.8±11.8 days, respectively. Six-hour mechanical damage of fresh PRBCs was demonstrated by increased erythrocyte fragmentation rates (p=0.015), hemolysis rates (p=0.003), and supernatant potassium levels (p=0.003) and decreased hematocrit levels (p=0.015). Old PRBC hemolysis rates (p=0.015), supernatant potassium levels (p=0.015), and supernatant hemoglobin (p=0.015) were increased and hematocrit levels were decreased (p=0.015) within 6 h. Two (13%) units of fresh PRBCs and none of the old PRBCs were eligible for transfusion after 6 h of mechanical stress. Conclusion When an austere combat environment was simulated for 24 h, fresh and old PRBC hemolysis rates were above the quality criteria. Currently, the technology to overcome this mechanical damage does not seem to exist. In light of the above data, a new national project is being performed.
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Affiliation(s)
- Aytekin Ünlü
- University of Health Sciences, Gülhane Training and Research Hospital, Clinic of General Surgery, Ankara, Turkey
| | - Soner Yılmaz
- University of Health Sciences, Gülhane Training and Research Hospital, Regional Blood and Training Center, Ankara, Turkey
| | - Özlem Yalçın
- Koç University Faculty of Medicine, Laboratory of Hemorheology, Hemodynamics, and Vascular Biology, İstanbul, Turkey
| | - Metin Uyanık
- Çorlu State Hospital, Clinic of Biochemistry, Tekirdağ, Turkey
| | - Patrizio Petrone
- NYU Winthrop Hospital, Clinic of Surgery, Mineola; New York Medical College, Valhalla, New York, USA; University of Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Rıza Aytaç Çetinkaya
- University of Health Sciences, Sultan Abdulhamid Han Training and Research Hospital, Clinic of Infectious Diseases, İstanbul, Turkey
| | - İbrahim Eker
- Afyon Kocatepe University Faculty of Medicine, Department of Pediatric Hematology, Afyonkarahisar, Turkey
| | - Murat Urkan
- University of Health Sciences, Gülhane Training and Research Hospital, Clinic of General Surgery, Ankara, Turkey
| | - Taner Özgürtaş
- University of Health Sciences, Gülhane Training and Research Hospital, Clinic of Biochemistry, Ankara, Turkey
| | - İsmail Yaşar Avcı
- University of Health Sciences, Gülhane Training and Research Hospital, Clinic of Infectious Diseases and Clinical Microbiology, Ankara, Turkey
| | - Nazif Zeybek
- University of Health Sciences, Gülhane Training and Research Hospital, Clinic of General Surgery, Ankara, Turkey
| | - Ali Cenk Aksu
- Koç University Faculty of Medicine, Laboratory of Hemorheology, Hemodynamics, and Vascular Biology, İstanbul, Turkey
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