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Maliszewska-Olejniczak K, Pytlak K, Dabrowska A, Zochowska M, Hoser J, Lukasiak A, Zajac M, Kulawiak B, Bednarczyk P. Deficiency of the BK Ca potassium channel displayed significant implications for the physiology of the human bronchial epithelium. Mitochondrion 2024; 76:101880. [PMID: 38604459 DOI: 10.1016/j.mito.2024.101880] [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: 01/22/2024] [Revised: 03/14/2024] [Accepted: 04/07/2024] [Indexed: 04/13/2024]
Abstract
Plasma membrane large-conductance calcium-activated potassium (BKCa) channels are important players in various physiological processes, including those mediated by epithelia. Like other cell types, human bronchial epithelial (HBE) cells also express BKCa in the inner mitochondrial membrane (mitoBKCa). The genetic relationships between these mitochondrial and plasma membrane channels and the precise role of mitoBKCa in epithelium physiology are still unclear. Here, we tested the hypothesis that the mitoBKCa channel is encoded by the same gene as the plasma membrane BKCa channel in HBE cells. We also examined the impact of channel loss on the basic function of HBE cells, which is to create a tight barrier. For this purpose, we used CRISPR/Cas9 technology in 16HBE14o- cells to disrupt the KCNMA1 gene, which encodes the α-subunit responsible for forming the pore of the plasma membrane BKCa channel. Electrophysiological experiments demonstrated that the disruption of the KCNMA1 gene resulted in the loss of BKCa-type channels in the plasma membrane and mitochondria. We have also shown that HBE ΔαBKCa cells exhibited a significant decrease in transepithelial electrical resistance which indicates a loss of tightness of the barrier created by these cells. We have also observed a decrease in mitochondrial respiration, which indicates a significant impairment of these organelles. In conclusion, our findings indicate that a single gene encodes both populations of the channel in HBE cells. Furthermore, this channel is critical for maintaining the proper function of epithelial cells as a cellular barrier.
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Affiliation(s)
- Kamila Maliszewska-Olejniczak
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Karolina Pytlak
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Adrianna Dabrowska
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Monika Zochowska
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Jakub Hoser
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Agnieszka Lukasiak
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Miroslaw Zajac
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Bogusz Kulawiak
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
| | - Piotr Bednarczyk
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland.
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Maliszewska-Olejniczak K, Bednarczyk P. Novel insights into the role of ion channels in cellular DNA damage response. Mutat Res Rev Mutat Res 2024; 793:108488. [PMID: 38266668 DOI: 10.1016/j.mrrev.2024.108488] [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] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/26/2024]
Abstract
The DNA damage response (DDR) is a complex and highly regulated cellular process that detects and repairs DNA damage. The integrity of the DNA molecule is crucial for the proper functioning and survival of cells, as DNA damage can lead to mutations, genomic instability, and various diseases, including cancer. The DDR safeguards the genome by coordinating a series of signaling events and repair mechanisms to maintain genomic stability and prevent the propagation of damaged DNA to daughter cells. The study of an ion channels in the context of DDR is a promising avenue in biomedical research. Lately, it has been reported that the movement of ions through channels plays a crucial role in various physiological processes, including nerve signaling, muscle contraction, cell signaling, and maintaining cell membrane potential. Knowledge regarding the involvement of ion channels in the DDR could support refinement of our approach to several pathologies, mainly cancer, and perhaps lead to innovative therapies. In this review, we focused on the ion channel's possible role in the DDR. We present an analysis of the involvement of ion channels in DDR, their role in DNA repair mechanisms, and cellular outcomes. By addressing these areas, we aim to provide a comprehensive perspective on ion channels in the DDR and potentially guide future research in this field. It is worth noting that the interplay between ion channels and the cellular DDR is complex and multifaceted. More research is needed to fully understand the underlying mechanisms and potential therapeutic implications of these interactions.
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Affiliation(s)
- Kamila Maliszewska-Olejniczak
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland.
| | - Piotr Bednarczyk
- Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
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Maliszewska-Olejniczak K, Kaniowski D, Araszkiewicz M, Tymińska K, Korgul A. Molecular Mechanisms of Specific Cellular DNA Damage Response and Repair Induced by the Mixed Radiation Field During Boron Neutron Capture Therapy. Front Oncol 2021; 11:676575. [PMID: 34094980 PMCID: PMC8170402 DOI: 10.3389/fonc.2021.676575] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 03/05/2021] [Accepted: 04/28/2021] [Indexed: 01/04/2023] Open
Abstract
The impact of a mixed neutron-gamma beam on the activation of DNA damage response (DDR) proteins and non-coding RNAs (ncRNAs) is poorly understood. Ionizing radiation is characterized by its biological effectiveness and is related to linear energy transfer (LET). Neutron-gamma mixed beam used in boron neutron capture therapy (BNCT) can induce another type of DNA damage such as clustered DNA or multiple damaged sites, as indicated for high LET particles, such as alpha particles, carbon ions, and protons. We speculate that after exposure to a mixed radiation field, the repair capacity might reduce, leading to unrepaired complex DNA damage for a long period and may promote genome instability and cell death. This review will focus on the poorly studied impact of neutron-gamma mixed beams with an emphasis on DNA damage and molecular mechanisms of repair. In case of BNCT, it is not clear which repair pathway is involved, and recent experimental work will be presented. Further understanding of BNCT-induced DDR mechanisms may lead to improved therapeutic efficiency against different tumors.
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Affiliation(s)
| | - Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
| | - Martyna Araszkiewicz
- Faculty of Physics, University of Warsaw, Warsaw, Poland.,Nuclear Facilities Operations Department, National Centre for Nuclear Research, Otwock, Poland
| | - Katarzyna Tymińska
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Otwock, Poland
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Maliszewska-Olejniczak K, Dróżdż A, Waluś M, Dorosz M, Gryziński MA. Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells. J Vis Exp 2020. [PMID: 32597879 DOI: 10.3791/61399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The purpose of the manuscript is to provide a step-by-step protocol for performing immunofluorescence microscopy to study the radiation-induced DNA damage response induced by neutron-gamma mixed-beam used in boron neutron capture therapy (BNCT). Specifically, the proposed methodology is applied for the detection of repair proteins activation which can be visualized as foci using antibodies specific to DNA double-strand breaks (DNA-DSBs). DNA repair foci were assessed by immunofluorescence in colon cancer cells (HCT-116) after irradiation with the neutron-mixed beam. DNA-DSBs are the most genotoxic lesions and are repaired in mammalian cells by two major pathways: non-homologous end-joining pathway (NHEJ) and homologous recombination repair (HRR). The frequencies of foci, immunochemically stained, for commonly used markers in radiobiology like γ-H2AX, 53BP1 are associated with DNA-DSB number and are considered as efficient and sensitive markers for monitoring the induction and repair of DNA-DSBs. It was established that γ-H2AX foci attract repair proteins, leading to a higher concentration of repair factors near a DSB. To monitor DNA damage at the cellular level, immunofluorescence analysis for the presence of DNA-PKcs representative repair protein foci from the NHEJ pathway and Rad52 from the HRR pathway was planned. We have developed and introduced a reliable immunofluorescence staining protocol for the detection of radiation-induced DNA damage response with antibodies specific for repair factors from NHEJ and HRR pathways and observed radiation-induced foci (RIF). The proposed methodology can be used for investigating repair protein that is highly activated in the case of neutron-mixed beam radiation, thereby indicating the dominance of the repair pathway.
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Affiliation(s)
| | - Agnieszka Dróżdż
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Sołtana 7, 05-400 Otwock, Poland
| | - Martyna Waluś
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Sołtana 7, 05-400 Otwock, Poland
| | - Michał Dorosz
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Sołtana 7, 05-400 Otwock, Poland
| | - Michał A Gryziński
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Sołtana 7, 05-400 Otwock, Poland
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Brodaczewska KK, Bielecka ZF, Maliszewska-Olejniczak K, Szczylik C, Porta C, Bartnik E, Czarnecka AM. Metastatic renal cell carcinoma cells growing in 3D on poly‑D‑lysine or laminin present a stem‑like phenotype and drug resistance. Oncol Rep 2019; 42:1878-1892. [PMID: 31545459 PMCID: PMC6788014 DOI: 10.3892/or.2019.7321] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 01/30/2019] [Accepted: 07/10/2019] [Indexed: 12/13/2022] Open
Abstract
3D spheroids are built by heterogeneous cell types in different proliferative and metabolic states and are enriched in cancer stem cells. The main aim of the study was to investigate the usefulness of a novel metastatic renal cell carcinoma (RCC) 3D spheroid culture for in vitro cancer stem cell physiology research and drug toxicity screening. RCC cell lines, Caki-1 (skin metastasis derived) and ACHN (pleural effusion derived), were efficiently cultured in growth-factor/serum deprived, defined, StemXvivo and Nutristem medium on laminin-coated or poly-D-lysine-coated plates. In optimal 3D culture conditions, ACHN cells (StemXVivo/poly-D-lysine) formed small spheroids with remaining adherent cells of an epithelial phenotype, while Caki-1 cells (StemXVivo/laminin) formed large dark spheroids with significantly reduced cell viability in the center. In the 3D structures, expression levels of genes encoding stem transcription factors (OCT4, SOX2, NES) and RCC stem cell markers (CD105, CD133) were deregulated in comparison to these expression levels in traditional 2D culture. Sunitinib, epirubicin and doxycycline were more toxic to cells cultured in monolayers than for cells in 3D spheroids. High numbers of cells arrested in the G0/G1 phase of the cell cycle were found in spheroids under sunitinib treatment. We showed that metastatic RCC 3D spheroids supported with ECM are a useful model to determine the cancer cell growth characteristics that are not found in adherent 2D cultures. Due to the more complex architecture, spheroids may mimic in vivo micrometastases and may be more appropriate to investigate novel drug candidate responses, including the direct effects of tyrosine kinase inhibitor activity against RCC cells.
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Affiliation(s)
- Klaudia K Brodaczewska
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Zofia F Bielecka
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | | | - Cezary Szczylik
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Camillo Porta
- Department of Internal Medicine and Therapeutics, University of Pavia, I‑27100 Pavia, Italy
| | - Ewa Bartnik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Poland
| | - Anna M Czarnecka
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
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Maliszewska-Olejniczak K, Brodaczewska KK, Bielecka ZF, Czarnecka AM. Three-Dimensional Cell Culture Model Utilization in Renal Carcinoma Cancer Stem Cell Research. Methods Mol Biol 2018; 1817:47-66. [PMID: 29959702 DOI: 10.1007/978-1-4939-8600-2_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Specific 3D conditions of cancer cell lines have been optimized over last years, with growing significance of serum-free and xeno-free culture variants. The choice of proper culture media enables cancer stem cells proliferation in primary and stable cell lines. To obtain renal cell cancer stem-like phenotype, we employed media dedicated for mesenchymal cells and adult stem cells. Developed RCC cell line 3D culture system enables effective drug testing, including tyrosine kinase inhibitor anti-cancer cell toxicity. To induce formation of 3D spheroids by RCC cell lines, StemXvivo and NutriStem media must be used. Usage of laminin- or poly-D-lysine coated plates enhances also the formation of spheroids in 3D-promoting media. Seeding is optimal with Caki-1 or ACHN cell lines as well as 786-O or HKCSC cells. Our bio-mimic 3D RCC cell culture model promotes cell viability and stem-related gene expression including E-cadherin, N-cadherin, HIF1, HIF2, VEGF, Sox2, Pax2, and Nestin. 3D spheroid formation ability and spheroid volume increase are disturbed upon drug treatment. Untreated 3D structures reach ~100 μm in diameter at the end of 14-day long experiment. Sorter-based cell cycle analysis and Ki-67 staining should be conducted to verify specific toxicity. We suggest that due to the more complex architecture 3D RCC culture is more relevant to investigate the in vivo-like tumor drug response.
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Affiliation(s)
- Kamila Maliszewska-Olejniczak
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, Warsaw, Poland
- National Centre for Nuclear Research, Sołtana, 7, 05-400, Otwock, Poland
| | - Klaudia K Brodaczewska
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, Warsaw, Poland
| | - Zofia F Bielecka
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, Warsaw, Poland
- School of Molecular Medicine, Warsaw Medical University, Warsaw, Poland
| | - Anna M Czarnecka
- Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, Warsaw, Poland.
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Bielecka ZF, Maliszewska-Olejniczak K, Safir IJ, Szczylik C, Czarnecka AM. Three-dimensional cell culture model utilization in cancer stem cell research. Biol Rev Camb Philos Soc 2016; 92:1505-1520. [DOI: 10.1111/brv.12293] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 06/20/2016] [Accepted: 06/27/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Zofia F. Bielecka
- Department of Oncology with Laboratory of Molecular Oncology; Military Institute of Medicine; Szaserów 128 04-141 Warsaw Poland
- Postgraduate School of Molecular Medicine; Medical University of Warsaw; Zwirki i Wigury 61 02-109 Warsaw Poland
| | - Kamila Maliszewska-Olejniczak
- Department of Oncology with Laboratory of Molecular Oncology; Military Institute of Medicine; Szaserów 128 04-141 Warsaw Poland
- Laboratory of DNA Sequencing and Oligonucleotides Synthesis, Institute of Biochemistry and Biophysics; Polish Academy of Sciences; Pawinskiego 5a 02-106 Warsaw Poland
| | - Ilan J. Safir
- Department of Urology; Emory University School of Medicine; Atlanta GA 30322 U.S.A
| | - Cezary Szczylik
- Department of Oncology with Laboratory of Molecular Oncology; Military Institute of Medicine; Szaserów 128 04-141 Warsaw Poland
| | - Anna M. Czarnecka
- Department of Oncology with Laboratory of Molecular Oncology; Military Institute of Medicine; Szaserów 128 04-141 Warsaw Poland
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Maliszewska-Olejniczak K, Gruchota J, Gromadka R, Denby Wilkes C, Arnaiz O, Mathy N, Duharcourt S, Bétermier M, Nowak JK. TFIIS-Dependent Non-coding Transcription Regulates Developmental Genome Rearrangements. PLoS Genet 2015; 11:e1005383. [PMID: 26177014 PMCID: PMC4503560 DOI: 10.1371/journal.pgen.1005383] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 06/22/2015] [Indexed: 02/07/2023] Open
Abstract
Because of their nuclear dimorphism, ciliates provide a unique opportunity to study the role of non-coding RNAs (ncRNAs) in the communication between germline and somatic lineages. In these unicellular eukaryotes, a new somatic nucleus develops at each sexual cycle from a copy of the zygotic (germline) nucleus, while the old somatic nucleus degenerates. In the ciliate Paramecium tetraurelia, the genome is massively rearranged during this process through the reproducible elimination of repeated sequences and the precise excision of over 45,000 short, single-copy Internal Eliminated Sequences (IESs). Different types of ncRNAs resulting from genome-wide transcription were shown to be involved in the epigenetic regulation of genome rearrangements. To understand how ncRNAs are produced from the entire genome, we have focused on a homolog of the TFIIS elongation factor, which regulates RNA polymerase II transcriptional pausing. Six TFIIS-paralogs, representing four distinct families, can be found in P. tetraurelia genome. Using RNA interference, we showed that TFIIS4, which encodes a development-specific TFIIS protein, is essential for the formation of a functional somatic genome. Molecular analyses and high-throughput DNA sequencing upon TFIIS4 RNAi demonstrated that TFIIS4 is involved in all kinds of genome rearrangements, including excision of ~48% of IESs. Localization of a GFP-TFIIS4 fusion revealed that TFIIS4 appears specifically in the new somatic nucleus at an early developmental stage, before IES excision. RT-PCR experiments showed that TFIIS4 is necessary for the synthesis of IES-containing non-coding transcripts. We propose that these IES+ transcripts originate from the developing somatic nucleus and serve as pairing substrates for germline-specific short RNAs that target elimination of their homologous sequences. Our study, therefore, connects the onset of zygotic non coding transcription to the control of genome plasticity in Paramecium, and establishes for the first time a specific role of TFIIS in non-coding transcription in eukaryotes. Paramecium tetraurelia provides an excellent model for studying the mechanisms involved in the production of non-coding transcripts and their mode of action. Different types of non-coding RNAs (ncRNAs) were shown to be implicated in the programmed DNA elimination process that occurs in this organism. At each sexual cycle, during development of the somatic nucleus from the germline nucleus, the genome is massively rearranged through the reproducible elimination of germline-specific sequences including thousands of short, single copy, non-coding Internal Eliminated Sequences (IES). Here, we demonstrate, using RNA interference, that the TFIIS4 gene encoding a development-specific homolog of RNA polymerase II elongation factor TFIIS, is indispensable for ncRNA synthesis in the new somatic nucleus. TFIIS4 depletion impairs the assembly of a functional somatic genome and affects excision of a large fraction of IESs, which leads to strong lethality in the sexual progeny. We propose that TFIIS4-dependent ncRNAs provide an important component of the molecular machinery that is responsible for developmental genome remodeling in Paramecium.
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Affiliation(s)
| | - Julita Gruchota
- Institute of Biochemistry and Biophysics, PAS, Warsaw, Poland
| | - Robert Gromadka
- Institute of Biochemistry and Biophysics, PAS, Warsaw, Poland
| | - Cyril Denby Wilkes
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris Sud, Gif-sur-Yvette, France
| | - Olivier Arnaiz
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris Sud, Gif-sur-Yvette, France
| | - Nathalie Mathy
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris Sud, Gif-sur-Yvette, France
| | - Sandra Duharcourt
- Institut Jacques Monod, CNRS, UMR 7592, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Mireille Bétermier
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris Sud, Gif-sur-Yvette, France
| | - Jacek K. Nowak
- Institute of Biochemistry and Biophysics, PAS, Warsaw, Poland
- * E-mail:
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9
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Czarnecka AM, Bielecka ZF, Kaminska K, Matak D, Szymanski L, Khan MI, Solarek W, Kornakiewicz A, Maliszewska-Olejniczak K, Szczylik C. Molecular events regulating clear cell renal cell cancer resistance to tyrosine kinase inhibitors. J Clin Oncol 2015. [DOI: 10.1200/jco.2015.33.15_suppl.e15600] [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)
| | - Zofia F Bielecka
- Department of Oncology with Laboratory of Molecular Medicine, Military Institute of Medicine, Warsaw, Poland
| | - Katarzyna Kaminska
- Department of Oncology with Laboratory of Molecular Medicine, Military Institute of Medicine, Warsaw, Poland
| | - Damian Matak
- Medical University of Warsaw, School of Molecular Medicine, Warsaw, Poland
| | - Lukasz Szymanski
- Military Institute of Medicine, Laboratory of Molecular Oncology, Warsaw, Poland
| | - Mohammed Imran Khan
- Military Institute of Medicine, Laboratory of Molecular Oncology, Warsaw, Poland
| | - Wojciech Solarek
- Medical University of Warsaw, School of Molecular Medicine, Warsaw, Poland
| | - Anna Kornakiewicz
- Military Institute of Medicine, Laboratory of Molecular Oncology, Warsaw, Poland
| | | | - Cezary Szczylik
- Department of Oncology, Military Institute of Medicine, Warsaw, Poland
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