1
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Adams DJ, Barlas B, McIntyre RE, Salguero I, van der Weyden L, Barros A, Vicente JR, Karimpour N, Haider A, Ranzani M, Turner G, Thompson NA, Harle V, Olvera-León R, Robles-Espinoza CD, Speak AO, Geisler N, Weninger WJ, Geyer SH, Hewinson J, Karp NA, Fu B, Yang F, Kozik Z, Choudhary J, Yu L, van Ruiten MS, Rowland BD, Lelliott CJ, Del Castillo Velasco-Herrera M, Verstraten R, Bruckner L, Henssen AG, Rooimans MA, de Lange J, Mohun TJ, Arends MJ, Kentistou KA, Coelho PA, Zhao Y, Zecchini H, Perry JRB, Jackson SP, Balmus G. Genetic determinants of micronucleus formation in vivo. Nature 2024; 627:130-136. [PMID: 38355793 PMCID: PMC10917660 DOI: 10.1038/s41586-023-07009-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 12/21/2023] [Indexed: 02/16/2024]
Abstract
Genomic instability arising from defective responses to DNA damage1 or mitotic chromosomal imbalances2 can lead to the sequestration of DNA in aberrant extranuclear structures called micronuclei (MN). Although MN are a hallmark of ageing and diseases associated with genomic instability, the catalogue of genetic players that regulate the generation of MN remains to be determined. Here we analyse 997 mouse mutant lines, revealing 145 genes whose loss significantly increases (n = 71) or decreases (n = 74) MN formation, including many genes whose orthologues are linked to human disease. We found that mice null for Dscc1, which showed the most significant increase in MN, also displayed a range of phenotypes characteristic of patients with cohesinopathy disorders. After validating the DSCC1-associated MN instability phenotype in human cells, we used genome-wide CRISPR-Cas9 screening to define synthetic lethal and synthetic rescue interactors. We found that the loss of SIRT1 can rescue phenotypes associated with DSCC1 loss in a manner paralleling restoration of protein acetylation of SMC3. Our study reveals factors involved in maintaining genomic stability and shows how this information can be used to identify mechanisms that are relevant to human disease biology1.
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Affiliation(s)
- D J Adams
- Wellcome Sanger Institute, Cambridge, UK.
| | - B Barlas
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | | | - I Salguero
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, UK
| | | | - A Barros
- Wellcome Sanger Institute, Cambridge, UK
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - J R Vicente
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - N Karimpour
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - A Haider
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - M Ranzani
- Wellcome Sanger Institute, Cambridge, UK
| | - G Turner
- Wellcome Sanger Institute, Cambridge, UK
| | | | - V Harle
- Wellcome Sanger Institute, Cambridge, UK
| | | | - C D Robles-Espinoza
- Wellcome Sanger Institute, Cambridge, UK
- Laboratorio Internacional de Investigación Sobre el Genoma Humano, Universidad Nacional Autónoma de México, Santiago de Querétaro, México
| | - A O Speak
- Wellcome Sanger Institute, Cambridge, UK
| | - N Geisler
- Wellcome Sanger Institute, Cambridge, UK
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - W J Weninger
- Division of Anatomy, MIC, Medical University of Vienna, Wien, Austria
| | - S H Geyer
- Division of Anatomy, MIC, Medical University of Vienna, Wien, Austria
| | - J Hewinson
- Wellcome Sanger Institute, Cambridge, UK
| | - N A Karp
- Wellcome Sanger Institute, Cambridge, UK
| | - B Fu
- Wellcome Sanger Institute, Cambridge, UK
| | - F Yang
- Wellcome Sanger Institute, Cambridge, UK
| | - Z Kozik
- Functional Proteomics Group, Chester Beatty Laboratories, The Institute of Cancer Research, London, UK
| | - J Choudhary
- Functional Proteomics Group, Chester Beatty Laboratories, The Institute of Cancer Research, London, UK
| | - L Yu
- Functional Proteomics Group, Chester Beatty Laboratories, The Institute of Cancer Research, London, UK
| | - M S van Ruiten
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - B D Rowland
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | | | | | - L Bruckner
- Experimental and Clinical Research Center (ECRC) of the MDC and Charité Berlin, Berlin, Germany
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - A G Henssen
- Experimental and Clinical Research Center (ECRC) of the MDC and Charité Berlin, Berlin, Germany
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
- Department of Pediatric Oncology and Hematology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - M A Rooimans
- Department of Human Genetics, Section of Oncogenetics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - J de Lange
- Department of Human Genetics, Section of Oncogenetics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - T J Mohun
- Division of Developmental Biology, MRC, National Institute for Medical Research, London, UK
| | - M J Arends
- Division of Pathology, Cancer Research UK Scotland Centre, Institute of Genetics & Cancer The University of Edinburgh, Edinburgh, UK
| | - K A Kentistou
- MRC Epidemiology Unit, Wellcome-MRC Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - P A Coelho
- Department of Genetics, University of Cambridge, Cambridge, UK
| | - Y Zhao
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - H Zecchini
- Metabolic Research Laboratory, Wellcome-MRC Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - J R B Perry
- MRC Epidemiology Unit, Wellcome-MRC Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, UK
- Metabolic Research Laboratory, Wellcome-MRC Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - S P Jackson
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, UK
- Cancer Research UK Cambridge Institute, Cambridge, UK
| | - G Balmus
- Wellcome Sanger Institute, Cambridge, UK.
- UK Dementia Research Institute at the University of Cambridge, University of Cambridge, Cambridge, UK.
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK.
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, UK.
- Department of Molecular Neuroscience, Transylvanian Institute of Neuroscience, Cluj-Napoca, Romania.
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2
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Antoniou EE, Rooseboom M, Kocabas NA, North CM, Zeegers MP. Micronuclei in human peripheral blood and bone marrow as genotoxicity markers: A systematic review and meta-analysis. Mutat Res Genet Toxicol Environ Mutagen 2023; 891:503689. [PMID: 37770146 DOI: 10.1016/j.mrgentox.2023.503689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 10/03/2023]
Abstract
Can human peripheral blood cells be used as a surrogate for bone marrow cells, in evaluating the genotoxic effects of stressors? We searched the Pubmed/Medline and PubChem databases to identify publications relevant to this question. Micronucleus formation was the genotoxicity endpoint. Three publications comparing exposed vs. non-exposed individuals are included in this analysis; the exposures were to ethylene oxide or ionising radiation (atomic bomb, thorotrast, or radioiodine therapy). Information was extracted on the types of exposure, the numbers of participants, and the micronucleus frequencies. Relative differences (odds ratios) and absolute differences (risk differences) in the numbers of micronuclei between exposed and non-exposed persons were calculated separately for individual cell types (peripheral blood and bone marrow). Random effects meta-analyses for the relative differences in cell abnormalities were performed. The results showed very small differences in the frequencies of micronuclei between exposed and non-exposed individuals, as measured in either peripheral blood or bone marrow cell populations, on both absolute and relative scales. No definite conclusion concerning the relative sensitivities of bone marrow and peripheral blood cells can be made, based on these publications.
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Affiliation(s)
| | | | | | - Colin M North
- ExxonMobil Biomedical Sciences, 1545 US Highway 22 East, Annandale, NJ 08801, USA
| | - Maurice P Zeegers
- Department of Epidemiology, Maastricht University, Maastricht, the Netherlands; MBP Holding, Heerlen, the Netherlands
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3
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Takeshita WM, Dos Santos JN, de Andrade CR, Ribeiro DA. Is micronucleus test a suitable method for monitoring oral mucosa exposed to dental bleachings in smokers? Arch Toxicol 2023; 97:2029-2030. [PMID: 36195746 DOI: 10.1007/s00204-022-03386-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/19/2022] [Indexed: 11/02/2022]
Affiliation(s)
| | - Jean Nunes Dos Santos
- Department of Oral Diagnosis and Therapeutics, Faculty of Dentistry, Federal University of Bahia, UFBA, Salvador, BA, Brazil
| | | | - Daniel Araki Ribeiro
- Department of Physiology and Pathology, School of Dentistry, Sao Paulo State University, Araraquara, SP, Brazil.
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, UNIFESP, Rua Silva Jardim, 136, Room 332, Vila Mathias, Santos, SP, 11050-020, Brazil.
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4
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Papathanasiou S, Mynhier NA, Liu S, Brunette G, Stokasimov E, Jacob E, Li L, Comenho C, van Steensel B, Buenrostro JD, Zhang CZ, Pellman D. Heritable transcriptional defects from aberrations of nuclear architecture. Nature 2023; 619:184-192. [PMID: 37286600 PMCID: PMC10322708 DOI: 10.1038/s41586-023-06157-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [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: 12/22/2021] [Accepted: 05/02/2023] [Indexed: 06/09/2023]
Abstract
Transcriptional heterogeneity due to plasticity of the epigenetic state of chromatin contributes to tumour evolution, metastasis and drug resistance1-3. However, the mechanisms that cause this epigenetic variation are incompletely understood. Here we identify micronuclei and chromosome bridges, aberrations in the nucleus common in cancer4,5, as sources of heritable transcriptional suppression. Using a combination of approaches, including long-term live-cell imaging and same-cell single-cell RNA sequencing (Look-Seq2), we identified reductions in gene expression in chromosomes from micronuclei. With heterogeneous penetrance, these changes in gene expression can be heritable even after the chromosome from the micronucleus has been re-incorporated into a normal daughter cell nucleus. Concomitantly, micronuclear chromosomes acquire aberrant epigenetic chromatin marks. These defects may persist as variably reduced chromatin accessibility and reduced gene expression after clonal expansion from single cells. Persistent transcriptional repression is strongly associated with, and may be explained by, markedly long-lived DNA damage. Epigenetic alterations in transcription may therefore be inherently coupled to chromosomal instability and aberrations in nuclear architecture.
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Affiliation(s)
- Stamatis Papathanasiou
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
- Institute of Molecular Biology, Mainz, Germany.
| | - Nikos A Mynhier
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Shiwei Liu
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Gregory Brunette
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Ema Stokasimov
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Etai Jacob
- Single-Cell Sequencing Program, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Data Sciences, Dana-Farber Cancer Institute, Boston, MA, USA
- AstraZeneca, Waltham, MA, USA
| | - Lanting Li
- Single-Cell Sequencing Program, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Data Sciences, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Biomedical Informatics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Caroline Comenho
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
- Gene Regulation Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Bas van Steensel
- Division of Gene Regulation and Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jason D Buenrostro
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
- Gene Regulation Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Cheng-Zhong Zhang
- Single-Cell Sequencing Program, Dana-Farber Cancer Institute, Boston, MA, USA.
- Department of Data Sciences, Dana-Farber Cancer Institute, Boston, MA, USA.
- Department of Biomedical Informatics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - David Pellman
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
- Single-Cell Sequencing Program, Dana-Farber Cancer Institute, Boston, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD, USA.
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5
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Silva RR, De Carli JP, Collares K, Vanini J, Presotto JS, Vargas JE, Loguercio AD, Benetti P. Reply to the opinion paper: is micronucleus test a suitable method for monitoring oral mucosa exposed to dental bleachings in smokers? Arch Toxicol 2023; 97:2031-2033. [PMID: 37227461 PMCID: PMC10209938 DOI: 10.1007/s00204-023-03517-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 05/09/2023] [Indexed: 05/26/2023]
Affiliation(s)
- Rodrigo Rohenkohl Silva
- School of Dentistry, University of Passo Fundo, Campus I, BR 285, Passo Fundo, RS, CEP 99001-970, Brazil
| | - João Paulo De Carli
- School of Dentistry, University of Passo Fundo, Campus I, BR 285, Passo Fundo, RS, CEP 99001-970, Brazil
| | - Kauê Collares
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, 96015-560, Brazil
| | - Júlia Vanini
- Department of Biological Sciences, School of Biological Sciences, University of Passo Fundo, Passo Fundo, RS, Brazil
| | - Júlia Stephanie Presotto
- School of Dentistry, University of Passo Fundo, Campus I, BR 285, Passo Fundo, RS, CEP 99001-970, Brazil
| | | | - Alessandro D Loguercio
- Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Paula Benetti
- School of Dentistry, University of Passo Fundo, Campus I, BR 285, Passo Fundo, RS, CEP 99001-970, Brazil.
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6
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Agustinus AS, Al-Rawi D, Dameracharla B, Raviram R, Jones BSCL, Stransky S, Scipioni L, Luebeck J, Di Bona M, Norkunaite D, Myers RM, Duran M, Choi S, Weigelt B, Yomtoubian S, McPherson A, Toufektchan E, Keuper K, Mischel PS, Mittal V, Shah SP, Maciejowski J, Storchova Z, Gratton E, Ly P, Landau D, Bakhoum MF, Koche RP, Sidoli S, Bafna V, David Y, Bakhoum SF. Epigenetic dysregulation from chromosomal transit in micronuclei. Nature 2023; 619:176-183. [PMID: 37286593 PMCID: PMC10322720 DOI: 10.1038/s41586-023-06084-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 04/14/2023] [Indexed: 06/09/2023]
Abstract
Chromosomal instability (CIN) and epigenetic alterations are characteristics of advanced and metastatic cancers1-4, but whether they are mechanistically linked is unknown. Here we show that missegregation of mitotic chromosomes, their sequestration in micronuclei5,6 and subsequent rupture of the micronuclear envelope7 profoundly disrupt normal histone post-translational modifications (PTMs), a phenomenon conserved across humans and mice, as well as in cancer and non-transformed cells. Some of the changes in histone PTMs occur because of the rupture of the micronuclear envelope, whereas others are inherited from mitotic abnormalities before the micronucleus is formed. Using orthogonal approaches, we demonstrate that micronuclei exhibit extensive differences in chromatin accessibility, with a strong positional bias between promoters and distal or intergenic regions, in line with observed redistributions of histone PTMs. Inducing CIN causes widespread epigenetic dysregulation, and chromosomes that transit in micronuclei experience heritable abnormalities in their accessibility long after they have been reincorporated into the primary nucleus. Thus, as well as altering genomic copy number, CIN promotes epigenetic reprogramming and heterogeneity in cancer.
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Affiliation(s)
- Albert S Agustinus
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Pharmacology Graduate Program, Weill Cornell Medicine, New York, NY, USA
| | - Duaa Al-Rawi
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Bhargavi Dameracharla
- Department of Computer Science, University of California, San Diego, La Jolla, CA, USA
| | | | - Bailey S C L Jones
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, CT, USA
| | - Stephanie Stransky
- Department of Biochemistry, Albert Einstein College of Medicine, New York, NY, USA
| | - Lorenzo Scipioni
- School of Engineering, University of California, Irvine, Irvine, CA, USA
| | - Jens Luebeck
- Department of Computer Science, University of California, San Diego, La Jolla, CA, USA
| | - Melody Di Bona
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Danguole Norkunaite
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Robert M Myers
- New York Genome Center, New York, NY, USA
- Tri-institutional MD-PhD Program, New York, NY, USA
| | - Mercedes Duran
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Seongmin Choi
- Computational Oncology, Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Britta Weigelt
- Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Shira Yomtoubian
- Department of Cell and Developmental Biology, Weill Cornell Medicine, New York, NY, USA
| | - Andrew McPherson
- Computational Oncology, Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Eléonore Toufektchan
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Kristina Keuper
- Department of Molecular Genetics, University of Kaiserslautern, Kaiserslautern, Germany
| | - Paul S Mischel
- Department of Pathology, School of Medicine, Stanford University, Stanford, CA, USA
| | - Vivek Mittal
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Cell and Developmental Biology, Weill Cornell Medicine, New York, NY, USA
| | - Sohrab P Shah
- Computational Oncology, Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - John Maciejowski
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Zuzana Storchova
- Department of Molecular Genetics, University of Kaiserslautern, Kaiserslautern, Germany
| | - Enrico Gratton
- School of Engineering, University of California, Irvine, Irvine, CA, USA
| | - Peter Ly
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Dan Landau
- New York Genome Center, New York, NY, USA
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Mathieu F Bakhoum
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, CT, USA
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
- Yale Cancer Center, Yale University, New Haven, CT, USA
| | - Richard P Koche
- Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Simone Sidoli
- Department of Biochemistry, Albert Einstein College of Medicine, New York, NY, USA
| | - Vineet Bafna
- Department of Computer Science, University of California, San Diego, La Jolla, CA, USA
| | - Yael David
- Pharmacology Graduate Program, Weill Cornell Medicine, New York, NY, USA.
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Tri-institutional PhD Program in Chemical Biology, New York, NY, USA.
| | - Samuel F Bakhoum
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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7
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Lin YF, Hu Q, Mazzagatti A, Valle-Inclán JE, Maurais EG, Dahiya R, Guyer A, Sanders JT, Engel JL, Nguyen G, Bronder D, Bakhoum SF, Cortés-Ciriano I, Ly P. Mitotic clustering of pulverized chromosomes from micronuclei. Nature 2023; 618:1041-1048. [PMID: 37165191 PMCID: PMC10307639 DOI: 10.1038/s41586-023-05974-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [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: 07/19/2022] [Accepted: 03/17/2023] [Indexed: 05/12/2023]
Abstract
Complex genome rearrangements can be generated by the catastrophic pulverization of missegregated chromosomes trapped within micronuclei through a process known as chromothripsis1-5. As each chromosome contains a single centromere, it remains unclear how acentric fragments derived from shattered chromosomes are inherited between daughter cells during mitosis6. Here we tracked micronucleated chromosomes with live-cell imaging and show that acentric fragments cluster in close spatial proximity throughout mitosis for asymmetric inheritance by a single daughter cell. Mechanistically, the CIP2A-TOPBP1 complex prematurely associates with DNA lesions within ruptured micronuclei during interphase, which poises pulverized chromosomes for clustering upon mitotic entry. Inactivation of CIP2A-TOPBP1 caused acentric fragments to disperse throughout the mitotic cytoplasm, stochastically partition into the nucleus of both daughter cells and aberrantly misaccumulate as cytoplasmic DNA. Mitotic clustering facilitates the reassembly of acentric fragments into rearranged chromosomes lacking the extensive DNA copy-number losses that are characteristic of canonical chromothripsis. Comprehensive analysis of pan-cancer genomes revealed clusters of DNA copy-number-neutral rearrangements-termed balanced chromothripsis-across diverse tumour types resulting in the acquisition of known cancer driver events. Thus, distinct patterns of chromothripsis can be explained by the spatial clustering of pulverized chromosomes from micronuclei.
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Affiliation(s)
- Yu-Fen Lin
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Qing Hu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Alice Mazzagatti
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jose Espejo Valle-Inclán
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| | - Elizabeth G Maurais
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Rashmi Dahiya
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Alison Guyer
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Interdisciplinary Biomedical Graduate Program, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jacob T Sanders
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, TN, USA
| | - Justin L Engel
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Giaochau Nguyen
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Daniel Bronder
- Human Oncology and Pathogenesis Program, Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Samuel F Bakhoum
- Human Oncology and Pathogenesis Program, Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Isidro Cortés-Ciriano
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK.
| | - Peter Ly
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
- Department of Cell Biology, Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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8
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Reimann H, Stopper H, Hintzsche H. Fate of micronuclei and micronucleated cells after treatment of HeLa cells with different genotoxic agents. Arch Toxicol 2023; 97:875-889. [PMID: 36564592 PMCID: PMC9968706 DOI: 10.1007/s00204-022-03433-9] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
Although micronuclei are well-known biomarkers of genotoxic damage, the biological consequences of micronucleus induction are only poorly understood. To further elucidate these consequences, HeLa cells stably expressing histone 2B coupled with green fluorescent protein were used for long-term live cell imaging to investigate the fate of micronuclei and micronucleated cells after treatment of cells with various genotoxic agents (doxorubicin (20, 30 and nM), tert-butyl hydroperoxide (tBHP, 50, 100 and 150 µM), radiation (0.5, 1 and 2 Gy), methyl methanesulfonate (MMS, 20, 25 and 30 µg/ml) and vinblastine (1, 2 and 3 nM)). Most micronuclei persist for multiple cell cycles or reincorporate while micronucleated cells were more prone to cell death, senescence and fatal mitotic errors compared to non-micronucleated cells, which is consistent with previous studies using etoposide. No clear substance-related effects on the fate of micronuclei and micronucleated cells were observed. To further investigate the fate of micronuclei, extrusion of micronuclei was studied with treatments reported as inducing the extrusion of micronuclei. Since extrusion was not observed in HeLa cells, the relevance of extrusion of micronuclei remains unclear. In addition, degradation of micronuclei was analysed via immunostaining of γH2AX, which demonstrated a high level of DNA damage in micronuclei compared to the main nuclei. Furthermore, transduction with two reporter genes (LC3B-dsRed and LaminB1-dsRed) was conducted followed by long-term live cell imaging. While autophagy marker LC3B was not associated with micronuclei, Lamin B1 was found in approximately 50% of all micronuclei. While degradation of micronuclei was not observed to be a frequent fate of micronuclei, the results show impaired stability of DNA and micronuclear envelope indicating rupture of micronuclei as a pre-step to chromothripsis.
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Affiliation(s)
- Hauke Reimann
- Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany
- Bavarian Health and Food Safety Authority, Erlangen, Germany
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany
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9
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Meng QQ, Zhang RF, Zhang ZX, Yang Y, Chai DL, Yuan YY, Ren Y, Dong JC, Dang XH. ESTABLISHMENT OF THE IN VITRO DOSE-RESPONSE CALIBRATION CURVE FOR X-RAY-INDUCED MICRONUCLEI IN HUMAN LYMPHOCYTES. Radiat Prot Dosimetry 2022; 198:1338-1345. [PMID: 35961020 DOI: 10.1093/rpd/ncac170] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/13/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
The cytokinesis-block micronucleus assay has proven to be a reliable technique for biological dosimetry. This study aimed to establish the dose-response curve for X-ray-induced micronucleus. Peripheral blood samples from three healthy donors were irradiated with various doses and scoring criteria by the micronuclei (MN) in binucleated cells. The results showed that the frequency of MN increased with the elevation of radiation dose. CABAS and Dose Estimate software were used to fit the MN and dose into a linear quadratic model, and the results were compared. The linear and quadratic coefficients obtained by the two software were basically the same and were comparable with published curves of similar radiation quality and dose rates by other studies. The dose-response curve established in this study can be used as an alternative method for in vitro dose reconstruction and provides a reliable tool for biological dosimetry in accidental or occupational radiation exposures.
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Affiliation(s)
- Qian-Qian Meng
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Rui-Feng Zhang
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Zhong-Xin Zhang
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Yi Yang
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Dong-Liang Chai
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Ya-Yi Yuan
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Yue Ren
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Juan-Cong Dong
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
| | - Xu-Hong Dang
- China Institute for Radiation Protection (CIRP), Taiyuan 030006, Shanxi, China
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10
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Vicic A, Stipoljev F. Susceptibility to chromosome instability and occurrence of the regular form of Down syndrome in young couples. Mutat Res Genet Toxicol Environ Mutagen 2022; 881:503511. [PMID: 36031329 DOI: 10.1016/j.mrgentox.2022.503511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 05/27/2022] [Accepted: 05/28/2022] [Indexed: 06/15/2023]
Abstract
Although the risk of pregnancy with Down syndrome (DS) increases with age, conceptions with trisomy 21 can occur in mothers aged 35 or less. The micronucleus test on peripheral blood lymphocytes is a well-recognized method for studying chromosomal instability. The aim of this study was to evaluate the application of the micronucleus assay and fluorescence in situ hybridization (FISH) for estimation of chromosome instability and occurrence of trisomy 21 in young parents having pregnancy or a child with the regular form of Down syndrome. The study included 54 parents (27 couples) who had previous pregnancy with trisomy 21 at age 35 or less. The control group consisted of 30 couples with two healthy children and no previous spontaneous abortions. Parents with trisomy 21 pregnancy had significantly higher frequencies of micronuclei in binucleated cells. There was no statistically significant difference between the study and control groups in the frequencies of micronuclei in mononuclear cells, nuclear buds, or nucleoplasmic bridges. FISH analysis showed higher percentages of micronuclei containing whole chromosomes as well as statistically significant higher numbers of micronuclei containing chromosome 21 in the peripheral blood of DS parents. There was no statistically significant difference between the two groups in the responses of peripheral blood lymphocytes to treatment with the mutagen mitomycin C. Our results suggest that young parents with a history of the regular form of Down syndrome have a higher susceptibility to chromosome nondisjunction in peripheral blood lymphocytes. The micronucleus assay showed high specificity, but moderate sensitivity, for risk assessment of trisomy 21 pregnancy.
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Affiliation(s)
- Ana Vicic
- Cytogenetic Laboratory, Department of Obstetrics and Gynecology, Clinical Hospital "Sveti Duh", Sveti Duh 64, HR-10000 Zagreb, Croatia; University of Applied Health Sciences, Mlinarska cesta 38, HR-10000 Zagreb, Croatia.
| | - Feodora Stipoljev
- Cytogenetic Laboratory, Department of Obstetrics and Gynecology, Clinical Hospital "Sveti Duh", Sveti Duh 64, HR-10000 Zagreb, Croatia; Faculty of Medicine, University of Osijek, Josipa Huttlera 4, HR-31000 Osijek, Croatia
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11
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Luna-Carrascal J, Quintana-Sosa M, Olivero-Verbel J. Genotoxicity biomarkers in car repair workers from Barranquilla, a Colombian Caribbean City. J Toxicol Environ Health A 2022; 85:263-275. [PMID: 34839807 DOI: 10.1080/15287394.2021.2000542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Exposure to chemicals and particles generated in automotive repair shops is a common and underestimated problem. The objective of this study was to assess the genotoxic status of auto repair workers with (1) a questionnaire to gather sociodemographic information and self-reported exposure to hazardous chemicals and (2) measurement of various biochemical parameters. Blood and oral mucosa samples were collected from 174 male volunteers from Barranquilla, Colombia, aged 18-55 years: 87 were active car repairmen and 87 were individuals with no known exposure to hazardous chemicals. Peripheral blood lymphocytes were collected for the comet and cytokinesis-blocking micronucleus (CBMN) assays, while oral mucosal epithelium extracted to quantify micronucleated cells (MNC). DNA was extracted to assess polymorphisms in the DNA repair (XRCC1) and metabolism-related genes (GSTT1 and GSTM1) using PCR-RFLP. DNA damage and frequency of micronuclei (MN) in lymphocytes and oral mucosa were significantly higher in exposed compared to control group. In both groups genotypes and allelic variants for XRCC1 and GSTT1 met the Hardy-Weinberg equilibrium (HWE). In contrast, GSTM1 deviated from HWE. In the exposed group genotypic variants were not correlated with DNA damage or MN presence in cells. DNA damage and occurrence of MN in mucosa and lymphocytes correlated with age and time of service (occupational exposure ≥ 3 years). In summary, workers in car repair shops exhibited genotoxic effects depending upon exposure duration in the workplace which occurred independent of DNA repair XRCC1 gene and metabolism genes GSTT1 and GSTM1. Date demonstrate that health authorities improve air quality in auto repair facilities to avoid occupational DNA damage.
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Affiliation(s)
- Jaime Luna-Carrascal
- Facultad de Ciencias Básicas y Biomédicas, Universidad Simón Bolívar, Barranquilla, Colombia
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus, University of Cartagena, Cartagena, Colombia
| | - Milton Quintana-Sosa
- Facultad de Ciencias Básicas y Biomédicas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - Jesus Olivero-Verbel
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus, University of Cartagena, Cartagena, Colombia
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12
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Muradyan RE, arsadanyan G, Nersesyan A. Re: Evaluation of Micronuclei and Cytomorphometric Changes in Patients with Different Tobacco Related Habits Using Exfoliated Buccal Cells. Asian Pac J Cancer Prev 2022; 23:755-757. [PMID: 35345343 PMCID: PMC9360928 DOI: 10.31557/apjcp.2022.23.3.755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/22/2022] [Indexed: 11/25/2022] Open
Affiliation(s)
| | | | - Armen Nersesyan
- Center for Cancer Research, Medical University of Vienna, 1090 Vienna, Austria.
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13
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Lim HK, Hughes CO, Lim MJS, Li JJ, Rakshit M, Yeo C, Chng KR, Li A, Chan JSH, Ng KW, Leavesley DI, Smith BPC. Development of reconstructed intestinal micronucleus cytome (RICyt) assay in 3D human gut model for genotoxicity assessment of orally ingested substances. Arch Toxicol 2022; 96:1455-1471. [PMID: 35226136 PMCID: PMC9013689 DOI: 10.1007/s00204-022-03228-y] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 01/12/2022] [Indexed: 11/30/2022]
Abstract
The micronucleus (MN) assay is widely used as part of a battery of tests applied to evaluate the genotoxic potential of chemicals, including new food additives and novel food ingredients. Micronucleus assays typically utilise homogenous in vitro cell lines which poorly recapitulate the physiology, biochemistry and genomic events in the gut, the site of first contact for ingested materials. Here we have adapted and validated the MN endpoint assay protocol for use with complex 3D reconstructed intestinal microtissues; we have named this new protocol the reconstructed intestine micronucleus cytome (RICyt) assay. Our data suggest the commercial 3D microtissues replicate the physiological, biochemical and genomic responses of native human small intestine to exogenous compounds. Tissues were shown to maintain log-phase proliferation throughout the period of exposure and expressed low background MN. Analysis using the RICyt assay protocol revealed the presence of diverse cell types and nuclear anomalies (cytome) in addition to MN, indicating evidence for comprehensive DNA damage and mode(s) of cell death reported by the assay. The assay correctly identified and discriminated direct-acting clastogen, aneugen and clastogen requiring exogenous metabolic activation, and a non-genotoxic chemical. We are confident that the genotoxic response in the 3D microtissues more closely resembles the native tissues due to the inherent tissue architecture, surface area, barrier effects and tissue matrix interactions. This proof-of-concept study highlights the RICyt MN cytome assay in 3D reconstructed intestinal microtissues is a promising tool for applications in predictive toxicology.
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Affiliation(s)
- Hui Kheng Lim
- Innovations in Food and Chemical Safety (IFCS) Programme, Agency for Science, Technology and Research, Singapore, Singapore.
- Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research, Singapore, Singapore.
- Future Ready Food Safety Hub (a Joint Initiative of A*STAR, SFA and NTU), Nanyang Technological University, Singapore, Singapore.
| | - Christopher Owen Hughes
- Innovations in Food and Chemical Safety (IFCS) Programme, Agency for Science, Technology and Research, Singapore, Singapore
- Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research, Singapore, Singapore
| | - Michelle Jing Sin Lim
- Innovations in Food and Chemical Safety (IFCS) Programme, Agency for Science, Technology and Research, Singapore, Singapore
- Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research, Singapore, Singapore
| | - Jia'En Jasmine Li
- National Centre for Food Science, Singapore Food Agency, Singapore, Singapore
| | - Moumita Rakshit
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Calvin Yeo
- National Centre for Food Science, Singapore Food Agency, Singapore, Singapore
| | - Kern Rei Chng
- National Centre for Food Science, Singapore Food Agency, Singapore, Singapore
| | - Angela Li
- National Centre for Food Science, Singapore Food Agency, Singapore, Singapore
| | | | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
- Environmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute, Singapore, Singapore
- Harvard T. H. Chan School of Public Health, Harvard University, Cambridge, USA
| | - David Ian Leavesley
- Innovations in Food and Chemical Safety (IFCS) Programme, Agency for Science, Technology and Research, Singapore, Singapore
- Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research, Singapore, Singapore
| | - Benjamin Paul Chapman Smith
- Innovations in Food and Chemical Safety (IFCS) Programme, Agency for Science, Technology and Research, Singapore, Singapore
- Future Ready Food Safety Hub (a Joint Initiative of A*STAR, SFA and NTU), Nanyang Technological University, Singapore, Singapore
- Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research, Singapore, Singapore
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14
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Mammel AE, Huang HZ, Gunn AL, Choo E, Hatch EM. Chromosome length and gene density contribute to micronuclear membrane stability. Life Sci Alliance 2022; 5:e202101210. [PMID: 34789512 PMCID: PMC8605325 DOI: 10.26508/lsa.202101210] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/01/2021] [Accepted: 11/03/2021] [Indexed: 11/24/2022] Open
Abstract
Micronuclei are derived from missegregated chromosomes and frequently lose membrane integrity, leading to DNA damage, innate immune activation, and metastatic signaling. Here, we demonstrate that two characteristics of the trapped chromosome, length and gene density, are key contributors to micronuclei membrane stability and determine the timing of micronucleus rupture. We demonstrate that these results are not due to chromosome-specific differences in spindle position or initial protein recruitment during post-mitotic nuclear envelope assembly. Micronucleus size strongly correlates with lamin B1 levels and nuclear pore density in intact micronuclei, but, unexpectedly, lamin B1 levels do not completely predict nuclear lamina organization or membrane stability. Instead, small gene-dense micronuclei have decreased nuclear lamina gaps compared to large micronuclei, despite very low levels of lamin B1. Our data strongly suggest that nuclear envelope composition defects previously correlated with membrane rupture only partly explain membrane stability in micronuclei. We propose that an unknown factor linked to gene density has a separate function that inhibits the appearance of nuclear lamina gaps and delays membrane rupture until late in the cell cycle.
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Affiliation(s)
- Anna E Mammel
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Heather Z Huang
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Amanda L Gunn
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Emma Choo
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Emily M Hatch
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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15
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Miglietta G, Russo M, Duardo RC, Capranico G. G-quadruplex binders as cytostatic modulators of innate immune genes in cancer cells. Nucleic Acids Res 2021; 49:6673-6686. [PMID: 34139015 PMCID: PMC8266585 DOI: 10.1093/nar/gkab500] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/24/2021] [Accepted: 05/28/2021] [Indexed: 02/06/2023] Open
Abstract
G-quadruplexes (G4s) are non-canonical nucleic acid structures involved in fundamental biological processes. As G4s are promising anticancer targets, in past decades the search for effective anticancer G4 binders aimed at the discovery of more cytotoxic ligands interfering with specific G4 structures at oncogenes or telomeres. Here, we have instead observed a significant activation of innate immune genes by two unrelated ligands at non-cytotoxic concentrations. The studied G4 binders (pyridostatin and PhenDC3) can induce an increase of micronuclei triggering the activation of the cytoplasmic STING (stimulator of interferon response cGAMP interactor 1) signaling pathway in human and murine cancer cells. Ligand activity can then lead to type I interferon production and innate immune gene activation. Moreover, specific gene expression patterns mediated by a G4 binder in cancer cells correlate with immunological hot features and better survival in human TCGA (The Cancer Genome Atlas) breast tumors. The findings open to the development of cytostatic G4 binders as effective immunomodulators for combination immunotherapies in unresponsive tumors.
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Affiliation(s)
- Giulia Miglietta
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, via Selmi 3, 40126 Bologna, Italy
| | - Marco Russo
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, via Selmi 3, 40126 Bologna, Italy
| | - Renée C Duardo
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, via Selmi 3, 40126 Bologna, Italy
| | - Giovanni Capranico
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, via Selmi 3, 40126 Bologna, Italy
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16
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Fenech M, Knasmueller S, Knudsen LE, Kirsch-Volders M, Deo P, Franzke B, Stopper H, Andreassi MG, Bolognesi C, Dhillon VS, Laffon B, Wagner KH, Bonassi S. "Micronuclei and Disease" special issue: Aims, scope, and synthesis of outcomes. Mutat Res Rev Mutat Res 2021; 788:108384. [PMID: 34893149 DOI: 10.1016/j.mrrev.2021.108384] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/02/2021] [Indexed: 11/18/2022]
Abstract
The purpose of the "Micronuclei and Disease" special issue (SI) is to: (i) Determine the level of evidence for association of micronuclei (MN), a biomarker of numerical and structural chromosomal aberrations, with risk of specific diseases in humans; (ii) Define plausible mechanisms that explain association of MN with each disease; (iii) Identify knowledge gaps and research needed to translate MN assays into clinical practice. The "MN and Disease" SI includes 14 papers. The first is a review of mechanisms of MN formation and their consequences in humans. 11 papers are systematic reviews and/or meta-analyses of the association of MN with reproduction, child health, inflammation, auto-immune disease, glycation, metabolic diseases, chronic kidney disease, cardiovascular disease, eleven common cancers, ageing and frailty. The penultimate paper focuses on effect of interventions on MN frequency in the elderly. A road map for translation of MN data into clinical practice is the topic of the final paper. The majority of reviewed studies were case-control studies in which the ratio of mean MN frequency in disease cases relative to controls, i.e. the mean ratio (MR), was calculated. The mean of these MR values, estimated by meta-analyses, for lymphocyte and buccal cell MN in non-cancer diseases were 2.3 and 3.6 respectively, and for cancers they were 1.7 and 2.6 respectively. The highest MR values were observed in studies of cancer cases in which MN were measured in the same tissue as the tumour (MR = 4.9-10.8). This special issue is an important milestone in the evidence supporting MN as a reliable genomic biomarker of developmental and degenerative disease risk. These advances, together with results from prospective cohort studies, are helping to identify diseases in which MN assays can be practically employed in the clinical setting to better identify high risk patients and to prioritise them for preventive therapy.
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Affiliation(s)
- Michael Fenech
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, 5000, Australia; Genome Health Foundation, North Brighton, SA, 5048, Australia; Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
| | - Siegfried Knasmueller
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | | | - Micheline Kirsch-Volders
- Laboratory for Cell Genetics, Department Biology, Faculty of Sciences and Bio-Engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Permal Deo
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, 5000, Australia
| | - Bernhard Franzke
- University of Vienna, Research Platform Active Ageing, Department of Nutritional Sciences, Althanstraße 14, 1090, Vienna, Austria
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Wuerzburg, Wuerzburg, Germany
| | | | - Claudia Bolognesi
- Environmental Carcinogenesis Unit, Ospedale Policlinico San Martino, Genoa, Italy
| | - Varinderpal S Dhillon
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, 5000, Australia
| | - Blanca Laffon
- Universidade da Coruña, Grupo DICOMOSA, Centro de Investigaciones Científicas Avanzadas (CICA), Departamento de Psicología, Facultad de Ciencias de la Educación, Campus Elviña s/n, 15071 A, Coruña, Spain; Instituto de Investigacio'n Biome'dica de A Coruña (INIBIC), AE CICA-INIBIC, Oza, 15071 A, Coruña, Spain
| | - Karl-Heinz Wagner
- University of Vienna, Research Platform Active Ageing, Department of Nutritional Sciences, Althanstraße 14, 1090, Vienna, Austria
| | - Stefano Bonassi
- Unit of Clinical and Molecular Epidemiology, IRCSS San Raffaele Pisana, Rome, Italy; Department of Human Sciences and Quality of Life Promotion, San Raffaele University, Via di Val Cannuta, 247, 00166, Rome, Italy
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17
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Kay JE, Corrigan JJ, Armijo AL, Nazari IS, Kohale IN, Torous DK, Avlasevich SL, Croy RG, Wadduwage DN, Carrasco SE, Dertinger SD, White FM, Essigmann JM, Samson LD, Engelward BP. Excision of mutagenic replication-blocking lesions suppresses cancer but promotes cytotoxicity and lethality in nitrosamine-exposed mice. Cell Rep 2021; 34:108864. [PMID: 33730582 PMCID: PMC8527524 DOI: 10.1016/j.celrep.2021.108864] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/22/2020] [Revised: 01/05/2021] [Accepted: 02/23/2021] [Indexed: 02/07/2023] Open
Abstract
N-Nitrosodimethylamine (NDMA) is a DNA-methylating agent that has been discovered to contaminate water, food, and drugs. The alkyladenine DNA glycosylase (AAG) removes methylated bases to initiate the base excision repair (BER) pathway. To understand how gene-environment interactions impact disease susceptibility, we study Aag-knockout (Aag-/-) and Aag-overexpressing mice that harbor increased levels of either replication-blocking lesions (3-methyladenine [3MeA]) or strand breaks (BER intermediates), respectively. Remarkably, the disease outcome switches from cancer to lethality simply by changing AAG levels. To understand the underlying basis for this observation, we integrate a suite of molecular, cellular, and physiological analyses. We find that unrepaired 3MeA is somewhat toxic, but highly mutagenic (promoting cancer), whereas excess strand breaks are poorly mutagenic and highly toxic (suppressing cancer and promoting lethality). We demonstrate that the levels of a single DNA repair protein tip the balance between blocks and breaks and thus dictate the disease consequences of DNA damage.
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Affiliation(s)
- Jennifer E Kay
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Joshua J Corrigan
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Amanda L Armijo
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Ilana S Nazari
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Ishwar N Kohale
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Precision Cancer Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | | | | | - Robert G Croy
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Dushan N Wadduwage
- The John Harvard Distinguished Science Fellows Program, Harvard University, Cambridge, MA 02138, USA; Center for Advanced Imaging, Harvard University, Cambridge, MA 02138, USA
| | - Sebastian E Carrasco
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | | | - Forest M White
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Precision Cancer Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - John M Essigmann
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Leona D Samson
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Bevin P Engelward
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA.
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18
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Mohr L, Toufektchan E, von Morgen P, Chu K, Kapoor A, Maciejowski J. ER-directed TREX1 limits cGAS activation at micronuclei. Mol Cell 2021; 81:724-738.e9. [PMID: 33476576 PMCID: PMC7897315 DOI: 10.1016/j.molcel.2020.12.037] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [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: 05/12/2020] [Revised: 11/18/2020] [Accepted: 12/18/2020] [Indexed: 02/06/2023]
Abstract
Micronuclei are aberrant nuclear compartments that can form as a result of chromosome mis-segregation. Frequent loss of micronuclear envelope integrity exposes DNA to the cytoplasm, leading to chromosome fragmentation and immune activation. Here, we use micronuclei purification to show that the endoplasmic reticulum (ER)-associated nuclease TREX1 inhibits cGAS activation at micronuclei by degrading micronuclear DNA upon micronuclear envelope rupture. We demonstrate that the ER accesses ruptured micronuclei and plays a critical role in enabling TREX1 nucleolytic attack. TREX1 mutations, previously implicated in immune disease, untether TREX1 from the ER, disrupt TREX1 localization to micronuclei, diminish micronuclear DNA damage, and enhance cGAS activation. These results establish ER-directed resection of micronuclear DNA by TREX1 as a critical regulator of cytosolic DNA sensing in chromosomally unstable cells and provide a mechanistic basis for the importance of TREX1 ER tethering in preventing autoimmunity.
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Affiliation(s)
- Lisa Mohr
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Eléonore Toufektchan
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Patrick von Morgen
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Kevan Chu
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Aakanksha Kapoor
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - John Maciejowski
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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19
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Kirsch-Volders M, Fenech M. Inflammatory cytokine storms severity may be fueled by interactions of micronuclei and RNA viruses such as COVID-19 virus SARS-CoV-2. A hypothesis. Mutat Res Rev Mutat Res 2021; 788:108395. [PMID: 34893160 PMCID: PMC8479308 DOI: 10.1016/j.mrrev.2021.108395] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 12/25/2022]
Abstract
In this review we bring together evidence that (i) RNA viruses are a cause of chromosomal instability and micronuclei (MN), (ii) those individuals with high levels of lymphocyte MN have a weakened immune response and are more susceptible to RNA virus infection and (iii) both RNA virus infection and MN formation can induce inflammatory cytokine production. Based on these observations we propose a hypothesis that those who harbor elevated frequencies of MN within their cells are more prone to RNA virus infection and are more likely, through combined effects of leakage of self-DNA from MN and RNA from viruses, to escalate pro-inflammatory cytokine production via the cyclic GMP-AMP synthase (cGAS), stimulator of interferon genes (STING) and the Senescence Associated Secretory Phenotype (SASP) mechanisms to an extent that is unresolvable and therefore confers high risk of causing tissue damage by an excessive and overtly toxic immune response. The corollaries from this hypothesis are (i) those with abnormally high MN frequency are more prone to infection by RNA viruses; (ii) the extent of cytokine production and pro-inflammatory response to infection by RNA viruses is enhanced and possibly exceeds threshold levels that may be unresolvable in those with elevated MN levels in affected organs; (iii) reduction of MN frequency by improving nutrition and life-style factors increases resistance to RNA virus infection and moderates inflammatory cytokine production to a level that is immunologically efficacious and survivable.
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Affiliation(s)
- Micheline Kirsch-Volders
- Laboratory for Cell Genetics, Department Biology, Faculty of Sciences and Bio-engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.
| | - Michael Fenech
- Genome Health Foundation, North Brighton, SA, 5048, Australia; Clinical and Health Sciences, University of South Australia, SA, 5000, Australia; Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
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20
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Helen N E, Nathan A A, Mathias N U, Nwani CD. Genotoxicity and Oxidative Stress Evaluations in Juvenile African Catfish Clarias gariepinus Exposed to NPK Fertilizer. J Aquat Anim Health 2020; 32:149-156. [PMID: 32506616 DOI: 10.1002/aah.10110] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/28/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Juvenile African Catfish (also known as Sharptooth Catfish) Clarias gariepinus were exposed to 2.26, 4.52, and 11.30 mg/L NPK (15-15-15) fertilizer for 21 d followed by 7 d of recovery to assess the genotoxic effects of the fertilizer in erythrocytes. Biomarkers of oxidative stress were evaluated in the liver and gill tissues. The fertilizer induced micronuclei formation with maximum effects on day 7 in erythrocytes of individuals that were exposed to 4.52 and 11.30 mg/L NPK, and on day 14 in individuals exposed to 2.26 mg/L of the same fertilizer. The lipid peroxidation, glutathione reductase, and reduced glutathione values in the exposed fish increased, while the values of catalase, superoxide dismutase, and glutathione peroxidase decreased. There were mixed trends in the recovery patterns after the 7-d withdrawal from the fertilizer. Careful use of the fertilizer in the field is recommended to avoid toxicological effects on nontarget organisms.
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Affiliation(s)
- Ebeh Helen N
- Integrated Science Department, Federal College of Education, Eha-Amufu, Nigeria
| | - Adegoke Nathan A
- Integrated Science Department, Federal College of Education, Eha-Amufu, Nigeria
| | - Ugwu Mathias N
- Integrated Science Department, Federal College of Education, Eha-Amufu, Nigeria
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21
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Islam SMM, Zahangir MM, Ashaf-Ud-Doulah M, Khatun MM, Shahjahan M. Extreme warm acclimation temperature alters oxygen consumption, micronucleus formation in erythrocytes, and gill morphology of rohu (Labeo rohita) fingerlings. Fish Physiol Biochem 2020; 46:2323-2330. [PMID: 33006002 DOI: 10.1007/s10695-020-00886-6] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/27/2020] [Indexed: 06/11/2023]
Abstract
Experiencing the seasonal variation and rapid global warming in the tropical climate is a common phenomenon which challenged the aquatic organisms to adapt the physiology and behavior. To investigate the effect of high-temperature acclimation, we selected Indian major carp, rohu (Labeo rohita), a commercially important freshwater aquaculture species. Oxygen consumptions, micronucleus formation in erythrocytes, and gill histopathology were observed in L. rohita fingerlings acclimated at three temperatures (30, 33, and 36 °C) for 30 days. Results showed that the highest acclimated temperature (36 °C) induced higher oxygen consumption and increased frequency of micronucleus formation in erythrocytes. Severity of different histological alterations (hyperplasia, epithelial necrosis, telangiectasis, epithelial lifting, and hypertrophy of chloride cells) in the gills was found to be increased in the highest acclimated temperature (36 °C). These findings indicate the temperature induced adaptive responses and climate vulnerability in a changing environment.
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Affiliation(s)
- S M Majharul Islam
- Laboratory of Fish Ecophysiology, Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Md Mahiuddin Zahangir
- Department of Fish Biology and Biotechnology, Faculty of Fisheries, Chattogram Veterinary and Animal Sciences University, Chattogram, 4225, Bangladesh
| | - Mohammad Ashaf-Ud-Doulah
- Laboratory of Fish Ecophysiology, Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Mt Marufa Khatun
- Department of Aquatic Animal Health Management, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, 1207, Bangladesh
| | - Md Shahjahan
- Laboratory of Fish Ecophysiology, Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.
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22
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Wultsch G, Setayesh T, Kundi M, Kment M, Nersesyan A, Fenech M, Knasmüller S. Induction of DNA damage as a consequence of occupational exposure to crystalline silica: A review and meta-analysis. Mutat Res Rev Mutat Res 2020; 787:108349. [PMID: 34083037 DOI: 10.1016/j.mrrev.2020.108349] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 01/23/2023]
Abstract
About 40 million workers are occupationally exposed to crystalline silica (CS) which was classified as a human carcinogen by the IARC. It is assumed that damage of the genetic material via inflammation and reactive oxygen species by CS lead to formation of malignant cells. We conducted a systematic literature search to find out if inhalation of CS containing dusts at workplaces causes damage of the genetic material. Thirteen studies were found eligible for this review, in most of them (n = 9) micronuclei (MN) which reflect structural/numerical chromosomal aberrations were monitored in lymphocytes and/or in exfoliated buccal cells. In 5 investigations DNA damage was measured in blood cells in single cell gel electrophoresis (comet) experiments. Frequently studied groups were potters, stone cutters, miners and construction workers. Results of meta-analyses show that exposure to CS causes formation of MN and DNA breaks, the overall ratio values were in exposed workers 2.06- and 1.96-fold higher than in controls, respectively. Two studies reported increased levels of oxidized guanine, and higher levels of DNA adducts with malondialdehyde indicating that exposure to CS leads to oxidative damage. The exposure of the workers to CS was quantified only in two studies, information concerning the size and chemical structures of the particles is lacking in most investigations. Therefore, it is not possible to use the results to derive occupational exposure limits of workers to CS which vary strongly in different countries. Nevertheless, the evaluation of the current state of knowledge shows that biomonitoring studies in which damage of the genetic material is measured in CS exposed workers can contribute to assess adverse health effects as consequence of DNA instability in specific occupations.
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Affiliation(s)
- Georg Wultsch
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Tahereh Setayesh
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Michael Kundi
- Center for Public Health, Department of Environmental Health, Medical University of Vienna, Vienna, Austria
| | - Michael Kment
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Armen Nersesyan
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Michael Fenech
- School of Pharmacy and Medical Sciences, Division of Health Sciences, University of South Australia, Adelaide, Australia
| | - Siegfried Knasmüller
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
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23
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Baig A, Avlasevich SL, Torous DK, Bemis JC, Saubermann LJ, Lovell DP, MacGregor JT, Dertinger SD. Assessment of systemic genetic damage in pediatric inflammatory bowel disease. Environ Mol Mutagen 2020; 61:901-909. [PMID: 32761646 PMCID: PMC8597720 DOI: 10.1002/em.22403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/24/2020] [Accepted: 08/01/2020] [Indexed: 05/19/2023]
Abstract
The etiology of distal site cancers in inflammatory bowel disease (IBD) is not well understood and requires further study. We investigated whether pediatric IBD patients' blood cells exhibit elevated levels of genomic damage by measuring the frequency of mutant phenotype (CD59-/CD55-) reticulocytes (MUT RET) as a reporter of PIG-A mutation, and the frequency of micronucleated reticulocytes (MN-RET) as an indicator of chromosomal damage. IBD patients (n = 18 new-onset disease, 46 established disease) were compared to age-matched controls (constipation or irritable bowel syndrome patients from the same clinic, n = 30) and young healthy adults age 19-24 (n = 25). IBD patients showed no indication of elevated MUT RET relative to controls (mean ± SD = 3.1 ± 2.3 × 10-6 vs. 3.6 ± 5.6 x 10-6 , respectively). In contrast, 59 IBD patients where %MN-RET measurements were obtained, 10 exceeded the upper bound 90% tolerance interval derived from control subjects (i.e., 0.42%). Furthermore, each of the 10 IBD patients with elevated MN-RET had established disease (10/42), none were new-onset (0/17) (p = .049). Interestingly, each of the subjects with increased chromosomal damage was receiving anti-TNF based monotherapy at the time blood was collected (10/10, 100%), whereas this therapy was less common (20/32, 63%) among patients that exhibited ≤0.42% MN-RET (p = .040). The results clearly indicate the need for further work to understand whether the results presented herein are reproducible and if so, to elucidate the causative factor(s) responsible for elevated MN-RET frequencies in some IBD patients.
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Affiliation(s)
- Ayesha Baig
- Department of Pediatrics, University of Rochester Medical Center, Rochester, New York
| | | | | | | | | | - David P. Lovell
- St. George's University of London, London Borough of Wandsworth, UK
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24
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Olofsson D, Cheng L, Fernández RB, Płódowska M, Riego ML, Akuwudike P, Lisowska H, Lundholm L, Wojcik A. Biological effectiveness of very high gamma dose rate and its implication for radiological protection. Radiat Environ Biophys 2020; 59:451-460. [PMID: 32488310 PMCID: PMC7368856 DOI: 10.1007/s00411-020-00852-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 05/25/2020] [Indexed: 05/06/2023]
Abstract
Many experimental studies are carried out to compare biological effectiveness of high dose rate (HDR) with that of low dose rate (LDR). The rational for this is the uncertainty regarding the value of the dose rate effectiveness factor (DREF) used in radiological protection. While a LDR is defined as 0.1 mGy/min or lower, anything above that is seen as HDR. In cell and animal experiments, a dose rate around 1 Gy/min is usually used as representative for HDR. However, atomic bomb survivors, the reference cohort for radiological protection, were exposed to tens of Gy/min. The important question is whether gamma radiation delivered at very high dose rate (VHDR-several Gy/min) is more effective in inducing DNA damage than that delivered at HDR. The aim of this investigation was to compare the biological effectiveness of gamma radiation delivered at VHDR (8.25 Gy/min) with that of HDR (0.38 Gy/min or 0.79 Gy/min). Experiments were carried out with human peripheral mononuclear cells (PBMC) and the human osteosarcoma cell line U2OS. Endpoints related to DNA damage response were analysed. The results show that in PBMC, VHDR is more effective than HDR in inducing gene expression and micronuclei. In U2OS cells, the repair of 53BP1 foci was delayed after VHDR indicating a higher level of damage complexity, but no VHDR effect was observed at the level of micronuclei and clonogenic cell survival. We suggest that the DREF value may be underestimated when the biological effectiveness of HDR and LDR is compared.
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Affiliation(s)
- Dante Olofsson
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Lei Cheng
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Rubén Barrios Fernández
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Magdalena Płódowska
- Department of Radiobiology and Immunology, Institute of Biology, Jan Kochanowski University, Kielce, Poland
| | - Milagrosa López Riego
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Pamela Akuwudike
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Halina Lisowska
- Department of Radiobiology and Immunology, Institute of Biology, Jan Kochanowski University, Kielce, Poland
| | - Lovisa Lundholm
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden
| | - Andrzej Wojcik
- Department of Molecular Biosciences, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius väg 20C, 106 91, Stockholm, Sweden.
- Department of Radiobiology and Immunology, Institute of Biology, Jan Kochanowski University, Kielce, Poland.
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25
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Guo X, Dai X, Wu X, Zhou T, Ni J, Xue J, Wang X. Understanding the birth of rupture-prone and irreparable micronuclei. Chromosoma 2020; 129:181-200. [PMID: 32671520 DOI: 10.1007/s00412-020-00741-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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] [Received: 03/06/2020] [Revised: 06/30/2020] [Accepted: 07/02/2020] [Indexed: 12/17/2022]
Abstract
Micronuclei are extra-nuclear bodies mainly derived from ana-telophase lagging chromosomes/chromatins (LCs) that are not incorporated into primary nuclei at mitotic exit. Unlike primary nuclei, most micronuclei are enclosed by nuclear envelope (NE) that is highly susceptible to spontaneous and irreparable rupture. Ruptured micronuclei act as triggers of chromothripsis-like chaotic chromosomal rearrangements and cGAS-mediated innate immunity and inflammation, raising the view that micronuclei play active roles in human aging and tumorigenesis. Thus, understanding the ways in which micronuclear envelope (mNE) goes awry acquires increased importance. Here, we review the data to present a general framework for this question. We firstly describe NE reassembly after mitosis and NE repair during interphase. Simultaneously, we briefly discuss how mNE is organized and how mNE rupture controls the fate of micronuclei and micronucleated cells. As a focus of this review, we highlight current knowledge about why mNE is rupture-prone and irreparable. For this, we survey observations from a series of elegant studies to provide a systematic overview. We conclude that the birth of rupture-prone and irreparable micronuclei may be the cumulative effects of their intracellular geographic origins, biophysical properties, and specific mNE features. We propose that DNA damage and immunogenicity in micronuclei increase stepwise from altered mNE components, mNE rupture, and refractory to repair. Throughout our discussion, we note interesting issues in mNE fragility that have yet to be resolved.
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Affiliation(s)
- Xihan Guo
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, 650500, Yunnan, China
| | - Xueqin Dai
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, Yunnan, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Xue Wu
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, 650500, Yunnan, China
| | - Tao Zhou
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, 650500, Yunnan, China
| | - Juan Ni
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, 650500, Yunnan, China
| | - Jinglun Xue
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Xu Wang
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, 650500, Yunnan, China.
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26
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Chennakrishnaiah S, Tsering T, Gregory C, Tawil N, Spinelli C, Montermini L, Karatzas N, Aprikian S, Choi D, Klewes L, Mai S, Rak J. Extracellular vesicles from genetically unstable, oncogene-driven cancer cells trigger micronuclei formation in endothelial cells. Sci Rep 2020; 10:8532. [PMID: 32444772 PMCID: PMC7244541 DOI: 10.1038/s41598-020-65640-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 02/19/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023] Open
Abstract
Oncogenic transformation impacts cancer cell interactions with their stroma, including through formation of abnormal blood vessels. This influence is often attributed to angiogenic growth factors, either soluble, or associated with tumor cell-derived extracellular vesicles (EVs). Here we examine some of the cancer-specific components of EV-mediated tumor-vascular interactions, including the impact of genetic driver mutations and genetic instability. Cancer cells expressing mutant HRAS oncogene exhibit aberrations of chromatin architecture, aneuploidy, cytoplasmic chromatin deposition and formation of micronuclei with a non-random chromosome content. EVs released from such HRAS-driven cells carry genomic DNA, including oncogenic sequences, and transfer this material to endothelial cells while inducing abnormal formation of micronuclei, along with cell migration and proliferation. Micronuclei were also triggered following treatment with EVs derived from glioma cells (and stem cells) expressing EGFRvIII oncogene, and in both endothelial cells and astrocytes. EVs from HRAS and EGFRvIII-driven cancer cells carry 19 common proteins while EVs from indolent control cells exhibit more divergent proteomes. Immortalized endothelial cell lines with disrupted TP53 pathway were refractory to EV-mediated micronuclei induction. We suggest that oncogenic transformation and intercellular trafficking of cancer-derived EVs may contribute to pathological vascular responses in cancer due to intercellular transmission of genomic instability.
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Affiliation(s)
- Shilpa Chennakrishnaiah
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Thupten Tsering
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Caroline Gregory
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Nadim Tawil
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Cristiana Spinelli
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Laura Montermini
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Nicolaos Karatzas
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Saro Aprikian
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Dongsic Choi
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada
| | - Ludger Klewes
- Department of Cell Biology, Research Institute of Oncology and Hematology, Cancer Care Manitoba, University of Manitoba, Winnipeg, Canada
| | - Sabine Mai
- Department of Cell Biology, Research Institute of Oncology and Hematology, Cancer Care Manitoba, University of Manitoba, Winnipeg, Canada
| | - Janusz Rak
- Research Institute of the McGill University Health Centre, McGill University, Montreal, QC, H4A 3J1, Canada.
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27
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Basit A, Cho MG, Kim EY, Kwon D, Kang SJ, Lee JH. The cGAS/STING/TBK1/IRF3 innate immunity pathway maintains chromosomal stability through regulation of p21 levels. Exp Mol Med 2020; 52:643-657. [PMID: 32284536 PMCID: PMC7210884 DOI: 10.1038/s12276-020-0416-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [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: 10/01/2019] [Revised: 12/23/2019] [Accepted: 12/29/2019] [Indexed: 11/18/2022] Open
Abstract
Chromosomal instability (CIN) in cancer cells has been reported to activate the cGAS-STING innate immunity pathway via micronuclei formation, thus affecting tumor immunity and tumor progression. However, adverse effects of the cGAS/STING pathway as they relate to CIN have not yet been investigated. We addressed this issue using knockdown and add-back approaches to analyze each component of the cGAS/STING/TBK1/IRF3 pathway, and we monitored the extent of CIN by measuring micronuclei formation after release from nocodazole-induced mitotic arrest. Interestingly, knockdown of cGAS (cyclic GMP-AMP synthase) along with induction of mitotic arrest in HeLa and U2OS cancer cells clearly resulted in increased micronuclei formation and chromosome missegregation. Knockdown of STING (stimulator of interferon genes), TBK1 (TANK-binding kinase-1), or IRF3 (interferon regulatory factor-3) also resulted in increased micronuclei formation. Moreover, transfection with cGAMP, the product of cGAS enzymatic activity, as well as add-back of cGAS WT (but not catalytic-dead mutant cGAS), or WT or constitutively active STING (but not an inactive STING mutant) rescued the micronuclei phenotype, demonstrating that all components of the cGAS/STING/TBK1/IRF3 pathway play a role in preventing CIN. Moreover, p21 levels were decreased in cGAS-, STING-, TBK1-, and IRF3-knockdown cells, which was accompanied by the precocious G2/M transition of cells and the enhanced micronuclei phenotype. Overexpression of p21 or inhibition of CDK1 in cGAS-depleted cells reduced micronuclei formation and abrogated the precocious G2/M transition, indicating that the decrease in p21 and the subsequent precocious G2/M transition is the main mechanism underlying the induction of CIN through disruption of cGAS/STING signaling.
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Affiliation(s)
- Abdul Basit
- Department of Biochemistry and Molecular Biology, Suwon, 443-721, South Korea
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 443-721, South Korea
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 443-721, South Korea
| | - Min-Guk Cho
- Department of Biochemistry and Molecular Biology, Suwon, 443-721, South Korea
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 443-721, South Korea
- Department of Cell Biology, The University of Miami Miller School of Medicine, University of Miami, Miami, FL, 33136, USA
| | - Eui-Yun Kim
- Department of Biochemistry and Molecular Biology, Suwon, 443-721, South Korea
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 443-721, South Korea
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 443-721, South Korea
| | - Dohyeong Kwon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
- Medytox Gwangkyo R&D Center, Medytox, Inc., Suwon, 16506, South Korea
| | - Suk-Jo Kang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Jae-Ho Lee
- Department of Biochemistry and Molecular Biology, Suwon, 443-721, South Korea.
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 443-721, South Korea.
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 443-721, South Korea.
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Oobatake Y, Shimizu N. Double-strand breakage in the extrachromosomal double minutes triggers their aggregation in the nucleus, micronucleation, and morphological transformation. Genes Chromosomes Cancer 2020; 59:133-143. [PMID: 31569279 DOI: 10.1002/gcc.22810] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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] [Received: 05/06/2019] [Revised: 08/27/2019] [Accepted: 09/15/2019] [Indexed: 01/09/2023] Open
Abstract
Gene amplification plays a pivotal role in malignant transformation. Amplified genes often reside on extrachromosomal double minutes (DMs). Low-dose hydroxyurea induces DM aggregation in the nucleus which, in turn, generates micronuclei composed of DMs. Low-dose hydroxyurea also induces random double-strand breakage throughout the nucleus. In the present study, we found that double-strand breakage in DMs is sufficient for induction of DM aggregation. Here, we used CRISPR/Cas9 to introduce specific breakages in both natural and artificially tagged DMs of human colorectal carcinoma COLO 320DM cells. Aggregation occurred in the S phase but not in the G1 phase within 4 hours after breakage, which suggested the possible involvement of homologous recombination in the aggregation of numerous DMs. Simultaneous detection of DMs and the phosphorylated histone H2AX revealed that the aggregation persisted after breakage repair. Thus, the aggregate generated cytoplasmic micronuclei at the next interphase. Our data also suggested that micronuclear entrapment eliminated the DMs or morphologically transformed them into giant DMs or homogeneously staining regions (HSRs). In this study, we obtained a model explaining the consequences of DMs after double-strand breakage in cancer cells. Because double-strand breakage is frequently involved in cancer therapy, the model suggests how it affects gene amplification.
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Affiliation(s)
- Yoshihiro Oobatake
- Graduate School of Biosphere Science, Hiroshima University, Hiroshima, Japan
| | - Noriaki Shimizu
- Graduate School of Biosphere Science, Hiroshima University, Hiroshima, Japan
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Nersesyan A, Muradyan R, Kundi M, Fenech M, Bolognesi C, Knasmueller S. Smoking causes induction of micronuclei and other nuclear anomalies in cervical cells. Int J Hyg Environ Health 2020; 226:113492. [PMID: 32088596 DOI: 10.1016/j.ijheh.2020.113492] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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] [Received: 11/07/2019] [Revised: 02/03/2020] [Accepted: 02/13/2020] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Smoking is an independent cause of cervical cancer, which is the 4th most common malignancy in women. It is currently not known if tobacco consumption causes chromosomal damage (which is a hallmark of human cancer) in cervical cells and if age and the hormonal status have an impact on tobacco induced genetic instability in the cervix. METHODS We conducted a study with pre- and post-menopausal women smokers and never-smokers (25/group). Smokers consumed 30 light/medium cigarettes/day and were matched with the non-smoking group. Cervical cells were analyzed for induction of micronuclei (MN) which are caused by structural/numerical chromosomal aberrations; additionally, other nuclear anomalies reflecting genomic instability and cytotoxicity were scored. Furthermore, the frequencies of basal cells were recorded which reflect the mitotic activity of the mucosa. RESULTS MN and other abnormalities were increased in both groups of smokers. The effects were most pronounced in postmenopausal smokers (i.e. 2-fold higher) compared to premenopausal smokers. Also the number of basal cells (indicative for cell proliferation) was clearly enhanced in older women. Tar and nicotine had no detectable impact on chromosomal damage but a clear association with pack-years was observed. CONCLUSIONS Smoking increased chromosomal instability, cytotoxicity and induced cell divisions in cervical mucosa cells of pre- and post-menopausal women. The effects were more pronounced in the latter group indicating a higher risk for diseases (including cancer) that are causally related to DNA damage.
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Affiliation(s)
- Armen Nersesyan
- Institute of Cancer Research, Medical University of Vienna, Vienna, Austria.
| | | | - Michael Kundi
- Center for Public Health, Medical University of Vienna, Vienna, Austria.
| | | | - Claudia Bolognesi
- Environmental Carcinogenesis Unit, Ospedale Policlinico San Martino, Genoa, Italy.
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Hopf NB, Danuser B, Bolognesi C, Wild P. Age related micronuclei frequency ranges in buccal and nasal cells in a healthy population. Environ Res 2020; 180:108824. [PMID: 31634720 DOI: 10.1016/j.envres.2019.108824] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 05/01/2019] [Revised: 10/08/2019] [Accepted: 10/11/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Micronuclei (MNs) are extranuclear DNA-containing bodies and determining MN frequencies is a measure of genomic instability. An age-related increase in MN frequencies in lymphocytes has been quantified, but this effect has not yet been measured in nasal and buccal cells. METHODS We determined the effect of age on the MN frequency distributions in buccal and nasal cells among a sample of a general adult population in Switzerland. To maximize the power to detect an effect of age in our population study, we recruited preferentially younger and older working age adults. We harvested buccal and nasal cells from 32 young (19-36 year) and 33 working age (47-71 years) participants. The collected cells were washed, centrifuged, and stained (Feulgen) before microscopic manual counting in 2000 cells. Based on these results, we developed an age-dependent background MN frequency chart to help interpret an individual's MN frequency score as an early signal for the effect of genotoxic exposure. RESULTS MN frequencies were respectively 0.53‰ and 0.47‰ for buccal and nasal among the younger and 0.87‰ and 1.03‰ in the older working age group. This corresponded to a multiplicative slope of 14% and 20% per 10 years of age for buccal and nasal cells, respectively. CONCLUSION Based on our study results, we are able to propose an approach for interpreting an individual's MN screening results.
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Affiliation(s)
- Nancy B Hopf
- Center for Primary Care and Public Health (Unisanté), Formerly IST, Institute for Work and Health, University of Lausanne, Lausanne, Epalinges, Switzerland.
| | - Brigitta Danuser
- Center for Primary Care and Public Health (Unisanté), Formerly IST, Institute for Work and Health, University of Lausanne, Lausanne, Epalinges, Switzerland.
| | - Claudia Bolognesi
- Environmental Carcinogenesis Unit Ospedale Policlinico San Martino, Genoa, Italy.
| | - Pascal Wild
- Center for Primary Care and Public Health (Unisanté), Formerly IST, Institute for Work and Health, University of Lausanne, Lausanne, Epalinges, Switzerland; INRS, French Institute for Research and Safety, Vandoeuvre, France.
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31
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Kneissig M, Keuper K, de Pagter MS, van Roosmalen MJ, Martin J, Otto H, Passerini V, Campos Sparr A, Renkens I, Kropveld F, Vasudevan A, Sheltzer JM, Kloosterman WP, Storchova Z. Micronuclei-based model system reveals functional consequences of chromothripsis in human cells. eLife 2019; 8:e50292. [PMID: 31778112 PMCID: PMC6910827 DOI: 10.7554/elife.50292] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [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: 07/17/2019] [Accepted: 11/23/2019] [Indexed: 01/18/2023] Open
Abstract
Cancer cells often harbor chromosomes in abnormal numbers and with aberrant structure. The consequences of these chromosomal aberrations are difficult to study in cancer, and therefore several model systems have been developed in recent years. We show that human cells with extra chromosome engineered via microcell-mediated chromosome transfer often gain massive chromosomal rearrangements. The rearrangements arose by chromosome shattering and rejoining as well as by replication-dependent mechanisms. We show that the isolated micronuclei lack functional lamin B1 and become prone to envelope rupture, which leads to DNA damage and aberrant replication. The presence of functional lamin B1 partly correlates with micronuclei size, suggesting that the proper assembly of nuclear envelope might be sensitive to membrane curvature. The chromosomal rearrangements in trisomic cells provide growth advantage compared to cells without rearrangements. Our model system enables to study mechanisms of massive chromosomal rearrangements of any chromosome and their consequences in human cells.
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Affiliation(s)
- Maja Kneissig
- Department of Molecular GeneticsTU KaiserslauternKaiserslauternGermany
| | - Kristina Keuper
- Department of Molecular GeneticsTU KaiserslauternKaiserslauternGermany
| | - Mirjam S de Pagter
- Department of Genetics, Center for Molecular MedicineUniversity Medical CenterUniversiteitswegNetherlands
| | - Markus J van Roosmalen
- Department of Genetics, Center for Molecular MedicineUniversity Medical CenterUniversiteitswegNetherlands
| | - Jana Martin
- Department of Molecular GeneticsTU KaiserslauternKaiserslauternGermany
| | - Hannah Otto
- Department of Molecular GeneticsTU KaiserslauternKaiserslauternGermany
| | | | | | - Ivo Renkens
- Department of Genetics, Center for Molecular MedicineUniversity Medical CenterUniversiteitswegNetherlands
| | - Fenna Kropveld
- Department of Genetics, Center for Molecular MedicineUniversity Medical CenterUniversiteitswegNetherlands
| | - Anand Vasudevan
- Cold Spring Harbor LaboratoryCold Spring HarborUnited States
| | | | - Wigard P Kloosterman
- Department of Genetics, Center for Molecular MedicineUniversity Medical CenterUniversiteitswegNetherlands
| | - Zuzana Storchova
- Department of Molecular GeneticsTU KaiserslauternKaiserslauternGermany
- Max Planck Institute of BiochemistryMartinsriedGermany
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Feliciano LM, Sávio ALV, de Castro Marcondes JP, da Silva GN, Salvadori DMF. Genetic Alterations in Patients with Two Clinical Phenotypes of Multiple Sclerosis. J Mol Neurosci 2019; 70:120-130. [PMID: 31686392 DOI: 10.1007/s12031-019-01408-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Received: 06/26/2019] [Accepted: 09/26/2019] [Indexed: 11/26/2022]
Abstract
The etiology of multiple sclerosis (MS) is still not known, but the interaction of genetic, immunological, and environmental factors seem to be involved. This study aimed to investigate genetic alterations and the vitamin D status in patients with relapsing-remitting MS (RRMS) and secondary progressive MS (SPMS). A total of 53 patients (29 RRMS; 24 SPMS) and 25 healthy subjects were recruited to evaluate the micronucleated cell (MNC) frequency and nuclear abnormalities in the buccal mucosa, gene expression profiling in mononuclear cells, and plasmatic vitamin D concentration in the blood. Results showed a higher frequency of cells with karyorrhexis (SPMS) and lower frequencies of nuclear pyknosis (RRMS and SPMS) and karyolysis (SPMS) in patients with MS. Significant increase in the frequency of MNC was detected in the buccal mucosa of RRMS and SPMS patients. HIF1A, IL13, IL18, MYC, and TNF were differentially expressed in MS patients, and APP was overexpressed in cells of RRMS compared to SPMS patients. No relationship was observed between vitamin D level and the differentially expressed genes. In conclusion, the cytogenetic alterations in the buccal mucosa can be important indicators of genetic instability and degenerative processes in patients with MS. Furthermore, our data introduced novel biomarkers associated with the molecular pathogenesis of MS.
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Yokoi A, Villar-Prados A, Oliphint PA, Zhang J, Song X, De Hoff P, Morey R, Liu J, Roszik J, Clise-Dwyer K, Burks JK, O’Halloran TJ, Laurent LC, Sood AK. Mechanisms of nuclear content loading to exosomes. Sci Adv 2019; 5:eaax8849. [PMID: 31799396 PMCID: PMC6867874 DOI: 10.1126/sciadv.aax8849] [Citation(s) in RCA: 160] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/24/2019] [Indexed: 05/20/2023]
Abstract
Exosome cargoes are highly varied and include proteins, small RNAs, and genomic DNA (gDNA). The presence of gDNA suggests that different intracellular compartments contribute to exosome loading, resulting in distinct exosome subpopulations. However, the loading of gDNA and other nuclear contents into exosomes (nExo) remains poorly understood. Here, we identify the relationship between cancer cell micronuclei (MN), which are markers of genomic instability, and nExo formation. Imaging flow cytometry analyses reveal that 10% of exosomes derived from cancer cells and <1% of exosomes derived from blood and ascites from patients with ovarian cancer carry nuclear contents. Treatment with genotoxic drugs resulted in increased MN and nExos both in vitro and in vivo. We observed that multivesicular body precursors and exosomal markers, such as the tetraspanins, directly interact with MN. Collectively, this work provides new insights related to nExos, which have implications for cancer biomarker development.
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Affiliation(s)
- Akira Yokoi
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Alejandro Villar-Prados
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Medicine, Stanford University, Stanford, CA, USA
| | - Paul Allen Oliphint
- Department of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX, USA
| | - Jianhua Zhang
- Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xingzhi Song
- Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Peter De Hoff
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Robert Morey
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Diego, La Jolla, CA, USA
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA, USA
| | - Jinsong Liu
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jason Roszik
- Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Melanoma Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Karen Clise-Dwyer
- Section of Transplant Immunology, Department of Stem Cell Transplantation and Cellular Therapy, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jared K. Burks
- Department of Leukemia and Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Theresa J. O’Halloran
- Department of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX, USA
| | - Louise C. Laurent
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Diego, La Jolla, CA, USA
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA, USA
| | - Anil K. Sood
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Center for RNA Interference and Non-Coding RNA, University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Zhang W, Chen Z, Zhang D, Zhao B, Liu L, Xie Z, Yao Y, Zheng P. KHDC3L mutation causes recurrent pregnancy loss by inducing genomic instability of human early embryonic cells. PLoS Biol 2019; 17:e3000468. [PMID: 31609975 PMCID: PMC6812846 DOI: 10.1371/journal.pbio.3000468] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 10/24/2019] [Accepted: 09/26/2019] [Indexed: 12/28/2022] Open
Abstract
Recurrent pregnancy loss (RPL) is an important complication in reproductive health. About 50% of RPL cases are unexplained, and understanding the genetic basis is essential for its diagnosis and prognosis. Herein, we report causal KH domain containing 3 like (KHDC3L) mutations in RPL. KHDC3L is expressed in human epiblast cells and ensures their genome stability and viability. Mechanistically, KHDC3L binds to poly(ADP-ribose) polymerase 1 (PARP1) to stimulate its activity. In response to DNA damage, KHDC3L also localizes to DNA damage sites and facilitates homologous recombination (HR)-mediated DNA repair. KHDC3L dysfunction causes PARP1 inhibition and HR repair deficiency, which is synthetically lethal. Notably, we identified two critical residues, Thr145 and Thr156, whose phosphorylation by Ataxia-telangiectasia mutated (ATM) is essential for KHDC3L’s functions. Importantly, two deletions of KHDC3L (p.E150_V160del and p.E150_V172del) were detected in female RPL patients, both of which harbor a common loss of Thr156 and are impaired in PARP1 activation and HR repair. In summary, our study reveals both KHDC3L as a new RPL risk gene and its critical function in DNA damage repair pathways. Recurrent pregnancy loss is an important complication in reproductive health, and about 50% of cases remain unexplained. This study shows that KHDC3L safeguards the genomic stability of human early embryonic cells, and damaging mutations in its gene cause recurrent pregnancy loss in humans.
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Affiliation(s)
- Weidao Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Yunnan Key Laboratory of Animal Reproduction, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Zhongliang Chen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Yunnan Key Laboratory of Animal Reproduction, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Dengfeng Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, China
| | - Bo Zhao
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Lu Liu
- Department of Obstetrics and Gynaecology, Yan An Hospital, Kunming Medical University, Kunming, China
| | - Zhengyuan Xie
- Yunnan Key Laboratory for Fertility Regulation and Birth Health of Minority Nationalities, Key Laboratory of Preconception Health in Western China, NHFPC, Population and Family Planning Institute of Yunnan Province, Kunming, China
| | - Yonggang Yao
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, China
- KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Ping Zheng
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Yunnan Key Laboratory of Animal Reproduction, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China
- * E-mail:
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Sawhney T, Manaktala N, Pralhad S, Natarajan S. Assessment and comparison of nuclear changes seen in gingivitis and periodontitis using fluorescent microscopy. Rev Esp Patol 2019; 52:208-213. [PMID: 31530403 DOI: 10.1016/j.patol.2019.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/02/2019] [Revised: 03/23/2019] [Accepted: 03/30/2019] [Indexed: 06/10/2023]
Abstract
INTRODUCTION AND OBJECTIVES The objective of this study was to observe the evolution of genotoxicity (micronucleation, binucleation and multinucleation) from normal to periodontally compromised gingival epithelium (gingivitis and periodontitis) and to compare the severity of damage. METHODS AND MATERIAL 45 participants formed 3 different categories; a control group of 15 healthy subjects, 15 subjects with gingivitis and 15 with chronic periodontitis. Smears were collected from all the gingiva and stained with acridine orange stain. A total of 500 cells were evaluated under fluorescent microscopy for nuclear abnormalities such as micronuclei, binucleation and multinucleation. The statistical analysis used was one way ANOVA and posthoc Tukey test. RESULTS AND CONCLUSION A statistically significant difference was observed when the age of the 3 groups were compared (p=0.002); the control group were younger than those with chronic periodontitis or gingivitis. With respect to genotoxic changes, the differences for binucleation (p=0.002) and multinucleation (p<0.001) were statistically significant thus suggesting advanced damage in the nucleus. Such changes in genotoxicity could be of help to a clinician in determining prognosis.
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Affiliation(s)
- Tanya Sawhney
- Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, India
| | - Nidhi Manaktala
- Department of Oral Pathology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, India.
| | - Swati Pralhad
- Department of Periodontology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, India
| | - Srikant Natarajan
- Department of Oral Pathology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, India
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ZIZZA A, GRIMA P, ANDREASSI M, TUMOLO M, BORGHINI A, DE DONNO A, NEGRO P, GUIDO M. HIV infection and frequency of micronucleus in human peripheral blood cells. J Prev Med Hyg 2019; 60:E191-E196. [PMID: 31650053 PMCID: PMC6797881 DOI: 10.15167/2421-4248/jpmh2019.60.3.1054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 07/12/2019] [Indexed: 01/17/2023]
Abstract
Purpose People living with HIV have higher rates of malignancies than the general population in the era of active antiretroviral therapy (ART). Genotoxic effects of HIV infection and/or ART that can induce neoplastic development are not yet well known. A prospective cohort study to investigate DNA damage measured through the micronuclei (MN) frequency in HIV-patients has been performed. Methods Peripheral blood mononuclear cells (PBMC) were isolated from 52 HIV-patients treated with ART and 55 healthy controls. Results By the comparison of MN frequency, a significant difference between HIV-patients (15.5 ± 9.8) and controls (6.0 ± 3.6) (p < 0.001) has been revealed. In univariate linear regression analysis, HCV infection (r = 0.31; p < 0.001), HIV-RNA (r = 0.29; p < 0.03) and duration of infection (r = – 0.16; p < 0.25) were associated with MN frequency; while only viral load (VL) significantly correlates (r = 0.29; p < 0.05) in a multiple regression model. Conclusions The association of VL with MN frequency supports a genotoxic effect of HIV infection.
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Affiliation(s)
- A. ZIZZA
- Institute of Clinical Physiology, National Research Council, Lecce, Italy
- Correspondence: Antonella Zizza, Institute of Clinical Physiology, National Research Council, via Prov.le Lecce-Monteroni, 73100 Lecce, Italy - Tel. +39 0832 422306 - Fax +39 0832 422340 -
| | - P. GRIMA
- Infectious Diseases Operative Unit, Vito Fazzi Hospital, Lecce, Italy
| | - M.G. ANDREASSI
- Genetics Unit, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - M.R. TUMOLO
- Institute for Research on Population and Social Policies, National Research Council, Brindisi, Italy
| | - A. BORGHINI
- Genetics Unit, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - A. DE DONNO
- Laboratory of Hygiene, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
- Inter-University Centre of Research on Influenza and other Transmissible Infections (CIRI-IT), Genoa, Italy
| | - P. NEGRO
- Immunohaematology and Transfusion Medicine Unit, Vito Fazzi Hospital, Lecce, Italy
| | - M. GUIDO
- Laboratory of Hygiene, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
- Inter-University Centre of Research on Influenza and other Transmissible Infections (CIRI-IT), Genoa, Italy
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Dobrzyńska MM, Gajowik A, Radzikowska J. The effect of lycopene supplementation on radiation-induced micronuclei in mice reticulocytes in vivo. Radiat Environ Biophys 2019; 58:425-432. [PMID: 31123854 PMCID: PMC6609584 DOI: 10.1007/s00411-019-00795-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/07/2019] [Indexed: 05/05/2023]
Abstract
Lycopene (LYC) is a natural pigment present in tomatoes and other red fruits and vegetables including red carrots, red peppers, watermelons, pink grapefruits, apricots, pink guavas, and papaya. There is some evidence that LYC may provide protection against mutations induced by ionizing radiation. The study aimed to investigate whether the genetic material of reticulocytes (RET) could be protected from radiation-induced damage by LYC. Mice were treated with LYC [0.15 mg/kg bodyweight (bw), 0.30 mg/kg bw], acute and fractionated irradiation (0.5 Gy, 1 Gy applied daily), or with both agents (0.5 Gy + 0.15 mg/kg bw LYC, 0.5 Gy + 0.30 mg/kg bw LYC, 1 Gy + 0.15 mg/kg bw LYC, 1 Gy + 0.30 mg/kg LYC). LYC supplementation was started at 24 h or 1 week after the first irradiation. Irradiation significantly enhanced the frequency of micronuclei (MN) in RET. LYC treatment at a dose of 0.15 mg/kg bw 24 h after starting fractionated radiation at 1 Gy significantly decreased (41-68%, p < 0.0125) the level of MN in peripheral blood and bone marrow RET. LYC supplementation at 0.30 mg/kg bw did not significantly alter the frequency of MN in peripheral blood, but significantly increased the frequency of bone marrow RET MN. LYC treatment on day 8 following the first radiation exposure showed results similar (92-117%, p > 0.24) to those obtained with irradiation alone. Lycopene may act as a radiomitigator but must be administered at low doses and as soon as possible after irradiation. Contrary, combined exposure with high doses of irradiation and LYC may enhance the mutagenic effect of irradiation.
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Affiliation(s)
- Małgorzata M Dobrzyńska
- Department of Radiation Hygiene and Radiobiology, National Institute of Public Health - National Institute of Hygiene, 24 Chocimska Street, 00-791, Warsaw, Poland.
| | - Aneta Gajowik
- Department of Radiation Hygiene and Radiobiology, National Institute of Public Health - National Institute of Hygiene, 24 Chocimska Street, 00-791, Warsaw, Poland
| | - Joanna Radzikowska
- Department of Radiation Hygiene and Radiobiology, National Institute of Public Health - National Institute of Hygiene, 24 Chocimska Street, 00-791, Warsaw, Poland
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Barbu LR, Obreja DC, Duliu OG. THE INVESTIGATION OF MICRONUCLEI FREQUENCY DISTRIBUTION FOR EXPOSED AND UNEXPOSED PERSONNEL TO IONIZING RADIATION. Radiat Prot Dosimetry 2019; 183:397-402. [PMID: 30289495 DOI: 10.1093/rpd/ncy155] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/01/2018] [Accepted: 08/04/2018] [Indexed: 06/08/2023]
Abstract
To establish at which extent the micronuclei (MN) frequency is influenced by occupational exposure to ionizing radiation, peripheral blood samples collected from 2151 subjects of both genders, smokers and non-smokers were analyzed. Among them, 378 (17.6%) were unexposed while the other 1773 (82.4%) were exposed to ionizing radiation for periods between 1 year and more than 30 years, at levels never overpassing legally regulated limits. The final results showed that for all investigated categories, MN frequency monotonously increases with the age by 1.75 ± 0.17 times in the case of exposed subjects, but independent on gender and smoking habit.
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Affiliation(s)
- Lucia Raluca Barbu
- University of Bucharet, Faculty of Physics, Doctoral School on Physics, 405, Atomistilor str., Magurele (Ilfov), Romania
| | - Doina Carmen Obreja
- National Institute of Public Health, 1-3, Doctor Leonte Anastasievici str., Bucharest, Romania
| | - O G Duliu
- University of Bucharest, Faculty of Physics, Departament of Structure of Matter, Earth and Atmospheric Physics and Astrophysics, 405, Atomistilor str., Magurele (Ilfov), Romania
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Espinoza F, Cecchini L, Morote J, Marcos R, Pastor S. Micronuclei frequency in urothelial cells of bladder cancer patients, as a biomarker of prognosis. Environ Mol Mutagen 2019; 60:168-173. [PMID: 30284731 DOI: 10.1002/em.22252] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 09/06/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
It has been suggested that the frequency of micronuclei (MN) in defoliated urothelial cells could be used as a biomarker for both the potential risk of bladder cancer (BC) and its progression. To prove this we have carried out a large study evaluating the MN frequency in a group of 383 hospital patients submitted to cystoscopy. From them, 77 were negative in their first cystoscopy, and were considered as a reference group; 79 were positive and were classified as patients with tumor; and 227 with previous bladder cancer submitted to follow-up monitoring were negative and classified as BC patients without tumor. Vesical washes were processed and the obtained cells were placed onto microscope slides for further scoring. To minimize scoring misinterpretations, cells were stained with DAPI, and observed in a fluorescence microscope. Results indicated that patients with BC presented higher incidence of MN than controls (18.29 ± 10.04 vs. 14.40 ± 8.49, P = 0.010, respectively). When individuals with BC were classified depending on whether the BC was a primary or a recidivated tumor, those patients with recurrent BC presented a higher frequency of MN than those where BC was detected for the first time (19.22 ± 9.59 vs. 16.60 ± 10.78, respectively); nevertheless, this increase did not reach statistical significance. Finally, a positive and significant correlation was observed between MN frequency and the degree of the tumor (P = 0.038). All this together would confirm the potentiality of the MN frequency in urothelial defoliated cells assay to be used, at least, in the follow-up and surveillance of BC patients. Environ. Mol. Mutagen. 60: 168-173, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Felicidad Espinoza
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, 08193, Barcelona, Spain
| | - Lluis Cecchini
- Department d' Urologia, Hospital del Mar-Parc de Salut Mar-IMIM, Barcelona, Spain
| | - Juan Morote
- Department d' Urologia, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Ricard Marcos
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, 08193, Barcelona, Spain
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Carlos III Institute of Health, Madrid, Spain
| | - Susana Pastor
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, 08193, Barcelona, Spain
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Carlos III Institute of Health, Madrid, Spain
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Long C, Liu J, Hu G, Feng H, Zhou D, Wang J, Zhai X, Zhao Z, Yu S, Wang T, Jia G. Modulation of homologous recombination repair gene polymorphisms on genetic damage in chromate exposed workers. Environ Toxicol Pharmacol 2019; 66:126-132. [PMID: 30677706 DOI: 10.1016/j.etap.2019.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/29/2018] [Accepted: 01/16/2019] [Indexed: 06/09/2023]
Abstract
Hexavalent chromium [Cr(VI)] is one of the most common environmental carcinogens, which is associated with DNA damage, genetic instability and increase the risk of cancer development. However, the mechanisms of genetic damage induced by Cr(VI) remains to be thoroughly illustrated. A molecular epidemiological study was conducted on 120 chromate exposed workers and 97 controls. Results indicated that,the rs12432907 of XRCC3 carrying T allele, the rs144848 of BRCA2 with C allele and the rs1805800 of NBS1 with genotype(TT) of individuals were associated with lower genetic damage, while the rs2295152 of XRCC3 carrying T allele, the rs13312986 (CC and CT genotypes) and the rs2697679 of NBS1 with A allele were associated with higher genetic damage in workers exposed to chromate. The interaction of chromate exposure with rs2295152 of XRCC3 had a significant effect on micronuclei frequency (MNF). The gene polymorphisms in homologous recombination repair pathway could modulate chromate-induced genetic damage.
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Affiliation(s)
- Changmao Long
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, 100191, PR China
| | - Jiaxing Liu
- Department of Medical Record, Third Hospital of Peking University, Beijing, 100191, PR China
| | - Guiping Hu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, 100191, PR China
| | - Huimin Feng
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, 100191, PR China
| | - Di Zhou
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, 100191, PR China
| | - Jing Wang
- Yima Center for Disease Control and Prevention, Sanmenxia City, Henan Province, 472300, PR China
| | - Xinxia Zhai
- Yima Center for Disease Control and Prevention, Sanmenxia City, Henan Province, 472300, PR China
| | - Zuchang Zhao
- Sanmenxia Municipal Center for Disease Control and Prevention, Sanmenxia, Henan Province, 472000, PR China
| | - Shanfa Yu
- Institute of Occupational Disease Prevention, Zhengzhou City, Henan Province, 450052, PR China
| | - Tiancheng Wang
- Department of Clinical Laboratories, Third Hospital of Peking University, Beijing 100191, PR China
| | - Guang Jia
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, 100191, PR China.
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Lehman RR, Archer KJ. Penalized negative binomial models for modeling an overdispersed count outcome with a high-dimensional predictor space: Application predicting micronuclei frequency. PLoS One 2019; 14:e0209923. [PMID: 30620740 PMCID: PMC6324811 DOI: 10.1371/journal.pone.0209923] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 12/13/2018] [Indexed: 11/19/2022] Open
Abstract
Chromosomal aberrations, such as micronuclei (MN), have served as biomarkers of genotoxic exposure and cancer risk. Guidelines for the process of scoring MN have been presented by the HUman MicroNucleus (HUMN) project. However, these guidelines were developed for assay performance but do not address how to statistically analyze the data generated by the assay. This has led to the application of various statistical methods that may render different interpretations and conclusions. By combining MN with data from other high-throughput genomic technologies such as gene expression microarray data, we may elucidate molecular features involved in micronucleation. Traditional methods that can model discrete (synonymously, count) data, such as MN frequency, require that the number of explanatory variables (P) is less than the number of samples (N). Due to this limitation, penalized models have been developed to enable model fitting for such over-parameterized datasets. Because penalized models in the discrete response setting are lacking, particularly when the count outcome is over-dispersed, herein we present our penalized negative binomial regression model that can be fit when P > N. Using simulation studies we demonstrate the performance of our method in comparison to commonly used penalized Poisson models when the outcome is over-dispersed and applied it to MN frequency and gene expression data collected as part of the Norwegian Mother and Child Cohort Study. Our countgmifs R package is available for download from the Comprehensive R Archive Network and can be applied to datasets having a discrete outcome that is either Poisson or negative binomial distributed and a high-dimensional covariate space.
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Affiliation(s)
- Rebecca R. Lehman
- United Network for Organ Sharing, Richmond, VA, United States of America
| | - Kellie J. Archer
- Division of Biostatistics, College of Public Health, The Ohio State University, Columbus, OH, United States of America
- * E-mail:
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Pinheiro-Sousa DB, Torres Junior AR, Silva D, Santos RL, Fortes Carvalho Neta RN. A screening test based on hematological and histological biomarkers to evaluate the environmental impacts in tambaqui (Colossoma macropomum) from a protected area in Maranhão, Brazilian Amazon. Chemosphere 2019; 214:445-451. [PMID: 30273878 DOI: 10.1016/j.chemosphere.2018.09.146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 06/03/2018] [Revised: 09/23/2018] [Accepted: 09/24/2018] [Indexed: 06/08/2023]
Abstract
Nowadays biomonitoring programs can benefit with mathematical models able to correlate biomarkers to monitor water pollution. The aim of this study was to develop a screening test based on hematological parameters and histological lesions in tambaqui (Colossoma macropomum), to allow the assessment of environmental impacts on fish inhabiting a protected area in Maranhão inside of Brazilian Amazon. Samples collected during three years (2012, 2013 and 2014) were grouped by season (dry and rainy) Water samples were also collected for physical chemistry analysis. Blood samples were stained with Acridine Orange to detect micronuclei and erythrocyte abnormalities. Gill tissues were stained with hematoxylin and counterstained with alcoholic eosin, and histopathological lesions were scored on a scale of 1-3, being 1 = minimal pathological importance, 2 = moderate pathological importance and 3 = marked pathological importance. A screening test for evaluating environmental impact was developed by fitting the measured data (necrosis, erythrocyte abnormalities, number of micronuclei) from tambaqui. A three-dimensional surface was fit to the empirical data. Our proposed model predicted the probability of necrosis (observed in euthanized animals) based on the numbers of micronuclei and abnormal erythrocytes (observed in blood samples from live animals) (correlation coefficient R = 0.89). The methodology could be applied for predicting contamination histories (chronic pollution that induces branchial lesions) in rivers using the micronucleus and erythrocyte abnormalities of the fishes (with a simple blood sample).
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Affiliation(s)
- Débora Batista Pinheiro-Sousa
- PhD Student in Biodiversity and Biotechnology of the Legal Amazon (Rede Bionorte, Brazil), Department of Environmental Engineering, Federal University of Maranhão (UFMA), Balsas, Maranhão, Brazil.
| | | | - Dilson Silva
- Applied Mathematics, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - Ricardo Luvizotto Santos
- Department of Oceanography and Limnology, Federal University of Maranhão (UFMA), São Luis, Maranhão, Brazil
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Kus A, Kwasniewska J, Szymanowska-Pułka J, Hasterok R. Dissecting the chromosomal composition of mutagen-induced micronuclei in Brachypodium distachyon using multicolour FISH. Ann Bot 2018; 122:1161-1171. [PMID: 29982446 PMCID: PMC6324755 DOI: 10.1093/aob/mcy115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 06/01/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND AND AIMS Brachypodium distachyon (Brachypodium) is a model species for temperate cereals and other economically important grasses. Its favourable cytogenetic features and advanced molecular infrastructure make it a good model for understanding the mechanisms of instability of plant genomes after mutagenic treatment. The aim of this study was to qualitatively and quantitatively assess the composition and origin of micronuclei arising from genomic fracture, and to detect possible 'hot spots' for mutagen-induced DNA breaks. METHODS Seeds of Brachypodium were treated with maleic hydrazide (MH) or X-rays. The structure of mutagen-induced micronuclei was analysed in root-tip meristematic cells using multicolour fluorescence in situ hybridization (mcFISH) with various repetitive (5S rDNA, 25S rDNA, telomeric, centromeric) and low-repeat [small and large pools of bacterial artificial chromosome (BAC) clones specific for chromosome Bd1] DNA sequences. KEY RESULTS The majority of micronuclei derive from large, acentric fragments. X-rays caused more interstitial DNA breaks than MH. Double-strand breaks rarely occurred in distal chromosome regions. Bd1 contributed to the formation of more mutagen-induced micronuclei than expected from random chromosome involvement. CONCLUSIONS mcFISH with chromosome-specific BAC clones offers insight into micronuclei composition, in so far as it allows their origin and formation to be determined more specifically. A reliable assay for micronuclei composition is crucial for the development of modern genotoxicity tests using plant cells. The combination of mutagenic treatments and well-developed cytomolecular resources in Brachypodium make this model species very promising for plant mutagenesis research.
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Affiliation(s)
- Arita Kus
- Department of Plant Anatomy and Cytology, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
| | - Jolanta Kwasniewska
- Department of Plant Anatomy and Cytology, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
| | - Joanna Szymanowska-Pułka
- Department of Biophysics and Plant Morphogenesis, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
| | - Robert Hasterok
- Department of Plant Anatomy and Cytology, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
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Bluhm K, Heger S, Redelstein R, Brendt J, Anders N, Mayer P, Schaeffer A, Hollert H. Genotoxicity of three biofuel candidates compared to reference fuels. Environ Toxicol Pharmacol 2018; 64:131-138. [PMID: 30391874 DOI: 10.1016/j.etap.2018.10.003] [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] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/13/2018] [Indexed: 06/08/2023]
Abstract
Global demand for alternative energy sources increases due to concerns regarding energy security and greenhouse gas emissions. However, little is known regarding the impacts of biofuels to the environment and human health even though the identification of such impacts is important to avoid biofuels leading to undesired effects. In this study mutagenicity and genotoxicity of the three biofuel candidates ethyl levulinate (EL), 2-methyltetrahydrofuran (2-MTHF) and 2-methylfuran (2-MF) were investigated in comparison to two petroleum-derived fuels and a biodiesel. None of the samples induced mutagenicity in the Ames fluctuation test. However, the Micronucleus assay revealed significant effects in Chinese hamster (Cricetulus griseus) V79 cells caused by the potential biofuels. 2-MF revealed the highest toxic potential with significant induction of micronuclei below 20.0 mg/L. EL and 2-MTHF induced micronuclei only at very high concentrations (>1000.0 mg/L). In regard to the genotoxic potential of 2-MF, its usage as biofuel should be critically discussed.
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Affiliation(s)
- Kerstin Bluhm
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Sebastian Heger
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Regine Redelstein
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Julia Brendt
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Nico Anders
- RWTH Aachen University, Aachener Verfahrenstechnik - Enzyme Process Technology, Worringerweg 1, 52074 Aachen, Germany
| | - Philipp Mayer
- Technical University of Denmark, Department of Environmental Engineering, Kongens Lyngby, Denmark
| | - Andreas Schaeffer
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany; Chongqing University, College of Resources and Environmental Science, Chongqing, 400715, China; Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing, 210093, China
| | - Henner Hollert
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany; Chongqing University, College of Resources and Environmental Science, Chongqing, 400715, China; Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing, 210093, China; Tongji University, College of Environmental Science and Engineering and State Key Laboratory of Pollution Control and Resource Reuse, Shanghai, 200092, China.
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Dash KC, Nishat R, Kumar H, Mishra S, Raghuvanshi M, Bajoria A. Comparative Study of Micronuclei Count in Patients with Different Tobacco-related Habits using Exfoliated Buccal Epithelial Cells: A Tool for Assessment of Genotoxicity. J Contemp Dent Pract 2018; 19:1076-1081. [PMID: 30287707] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
AIM To study and compare the genotoxic effects of tobacco using micronuclei count in individuals with different tobacco-related habits. MATERIALS AND METHODS A cross-sectional study was done comprising 200 individuals, divided into four groups. Group I: 50 subjects with history of tobacco chewing, group II: 50 subjects with a history of smoking tobacco, group III: 50 subjects with a history of both tobacco chewing and smoking, and group IV: 50 subjects without any habits as controls (age-matched). The study groups were individually further divided into three subgroups which comprised of subjects with history of substance abuse for less than 5, 5 to 10, and greater than 10 years. Exfoliated cells from the buccal mucosa of the subjects were collected and stained using Giemsa stain. A total of 1,000 cells were examined for each case and micronuclei frequency was scored according to the guidelines given by Tolbert et al. Results: The mean number of micronuclei count was 18.28 ± 10.0 in group I (smokeless tobacco users), 11.38 ± 6.3 in group II (subjects with history of tobacco smoking), 22.44 ± 9.8 in group III (subjects with history of using both smokeless and smokable form of tobacco), and 4.86 ± 2.4 in the control group. The statistical difference was found to be highly significant (p < 0.001). Similarly, based on the duration, highly significant difference was notable in the mean number of micronuclei in subjects who had a history of substance abuse for more than 10 years. CONCLUSION A significantly higher micronucleus frequency was found in smokeless tobacco users than in smokers and controls. Micronuclei assay in the exfoliated buccal cells is a useful and minimally invasive method for monitoring early genotoxic damage. CLINICAL SIGNIFICANCE Micronuclei assay can be used to detect genotoxic damage at the earliest and, if intervened at this point, may prevent frank malignancy, morbidity, and mortality.
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Affiliation(s)
- Kailash C Dash
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India, Phone: +919437902199, e-mail:
| | - Roquaiya Nishat
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Harish Kumar
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Silpiranjan Mishra
- Department of Oral Medicine and Radiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Malvika Raghuvanshi
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Atul Bajoria
- Department of Oral Medicine and Radiology, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
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Coimbra RSC, Mascarenhas MS, Saraiva VB, Santos CR, Lopes RM, Hauser-Davis RA, Oliveira VPS, Molisani MM, Almeida MG, Rezende CE, Carvalho CEV, Oliveira MM. Metal loads and biomarker suite responses in a tropical carnivorous fish indicative of anthropogenic impacts in a Southeastern Brazilian lagoon. Environ Monit Assess 2018; 190:564. [PMID: 30167796 DOI: 10.1007/s10661-018-6910-1] [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] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Tropical coastal lagoons are highly productive environments exhibiting high biodiversity. However, the use of these ecosystems by local communities is of concern, since this generally leads to environmental degradation. The Imboassica coastal lagoon, located in Macaé city, in Northern Rio de Janeiro, is an important ecosystem in the state, however, already displaying signs of anthropogenic impacts. Carnivorous fish Hoplias malabaricus specimens were sampled from this impacted site, as well as from a reference area. Fish from Imboassica Lagoon presented lower condition factor, lower cholinesterase activity, and higher percentage of erythrocyte micronuclei when compared to fish from the reference site. Metals in fish from Imboassica Lagoon were always higher than Encantada Lagoon, with some seasonal differences, where some metals were higher in the rainy season compared to the dry season in muscle tissue, with the exception of Cu, Fe, Sr, and Zn; and in the liver, except for Ba, Cd, Cr, Ni, and Sr. Cr and Mn in the edible muscle portion of the fish were higher than the limits established by Brazilian and International legislations as permissible for human consumption, thus leading to concerns regarding public health risks for the local population that use fish as their main protein source.
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Affiliation(s)
- R S C Coimbra
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - M S Mascarenhas
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - V B Saraiva
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil
| | - C R Santos
- Departamento de Bioquímica - Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - R M Lopes
- Laboratório de Comunicação Celular, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - R A Hauser-Davis
- Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - V P S Oliveira
- Polo de Inovação, UPEA/Instituto Federal Fluminense, Campos dos Goytacazes, RJ, Brazil
| | - M M Molisani
- Núcleo de Ecologia e de Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro (UFRJ), Macaé, RJ, Brazil
| | - M G Almeida
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - C E Rezende
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - C E V Carvalho
- Laboratório de Ciências Ambientais - Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil
| | - M M Oliveira
- Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil.
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Smith-Roe SL, Swartz CD, Shepard KG, Bryce SM, Dertinger SD, Waidyanatha S, Kissling GE, Auerbach SS, Witt KL. Black cohosh extracts and powders induce micronuclei, a biomarker of genetic damage, in human cells. Environ Mol Mutagen 2018; 59:416-426. [PMID: 29668046 PMCID: PMC6031461 DOI: 10.1002/em.22182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/08/2018] [Accepted: 02/19/2018] [Indexed: 06/08/2023]
Abstract
Black cohosh extract (BCE) is a widely used dietary supplement marketed to women to alleviate symptoms of gynecological ailments, yet its toxicity has not been well characterized. The National Toxicology Program (NTP) previously reported significant increases in micronucleated erythrocytes in peripheral blood of female Wistar Han rats and B6C3F1/N mice administered 15-1,000 mg BCE/kg/day by gavage for 90 days. These animals also developed a dose-dependent nonregenerative macrocytic anemia characterized by clinical changes consistent with megaloblastic anemia. Both micronuclei (MN) and megaloblastic anemia can arise from disruption of the folate metabolism pathway. The NTP used in vitro approaches to investigate whether the NTP's test lot of BCE, BCEs from various suppliers, and root powders from BC and other cohosh species, were genotoxic in general, and to gain insight into the mechanism of action of BCE genotoxicity. Samples were tested in human TK6 lymphoblastoid cells using the In Vitro MicroFlow® MN assay. The NTP BCE and a BC extract reference material (XRM) were tested in the MultiFlow® DNA Damage assay, which assesses biomarkers of DNA damage, cell division, and cytotoxicity. The NTP BCE and several additional BCEs were tested in bacterial mutagenicity assays. All samples induced MN when cells were grown in physiological levels of folic acid. The NTP BCE and BC XRM produced activity patterns consistent with an aneugenic mode of action. The NTP BCE and five additional BCEs were negative in bacterial mutagenicity tests. These findings show that black cohosh preparations induce chromosomal damage and may pose a safety concern. Environ. Mol. Mutagen. 59:416-426, 2018. © 2018 Published 2018. This article is a US Government work and is in the public domain in the USA.
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Affiliation(s)
- Stephanie L. Smith-Roe
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Carol D. Swartz
- Genetic and Molecular Toxicology Program, Integrated Laboratory Systems, Inc., Research Triangle Park, NC, USA
| | - Kim G. Shepard
- Genetic and Molecular Toxicology Program, Integrated Laboratory Systems, Inc., Research Triangle Park, NC, USA
| | | | | | - Suramya Waidyanatha
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Grace E. Kissling
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Scott S. Auerbach
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Kristine L. Witt
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
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Nikolouzakis TK, Vassilopoulou L, Fragkiadaki P, Sapsakos TM, Papadakis GZ, Spandidos DA, Tsatsakis AM, Tsiaoussis J. Improving diagnosis, prognosis and prediction by using biomarkers in CRC patients (Review). Oncol Rep 2018; 39:2455-2472. [PMID: 29565457 PMCID: PMC5983921 DOI: 10.3892/or.2018.6330] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [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: 02/09/2018] [Accepted: 03/21/2018] [Indexed: 12/17/2022] Open
Abstract
Colorectal cancer (CRC) is among the most common cancers. In fact, it is placed in the third place among the most diagnosed cancer in men, after lung and prostate cancer, and in the second one for the most diagnosed cancer in women, following breast cancer. Moreover, its high mortality rates classifies it among the leading causes of cancer‑related death worldwide. Thus, in order to help clinicians to optimize their practice, it is crucial to introduce more effective tools that will improve not only early diagnosis, but also prediction of the most likely progression of the disease and response to chemotherapy. In that way, they will be able to decrease both morbidity and mortality of their patients. In accordance with that, colon cancer research has described numerous biomarkers for diagnostic, prognostic and predictive purposes that either alone or as part of a panel would help improve patient's clinical management. This review aims to describe the most accepted biomarkers among those proposed for use in CRC divided based on the clinical specimen that is examined (tissue, faeces or blood) along with their restrictions. Lastly, new insight in CRC monitoring will be discussed presenting promising emerging biomarkers (telomerase activity, telomere length and micronuclei frequency).
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Affiliation(s)
| | - Loukia Vassilopoulou
- Laboratory of Forensic Sciences and Toxicology, Medical School, University of Crete, 71409 Heraklion, Crete, Greece
| | - Persefoni Fragkiadaki
- Laboratory of Forensic Sciences and Toxicology, Medical School, University of Crete, 71409 Heraklion, Crete, Greece
| | - Theodoros Mariolis Sapsakos
- Laboratory of Anatomy and Histology, Nursing School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Georgios Z. Papadakis
- Foundation for Research and Technology Hellas (FORTH), Institute of Computer Sciences (ICS), Computational Biomedicine Laboratory (CBML), 71003 Heraklion, Crete, Greece
| | - Demetrios A. Spandidos
- Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Crete, Greece
| | - Aristides M. Tsatsakis
- Laboratory of Forensic Sciences and Toxicology, Medical School, University of Crete, 71409 Heraklion, Crete, Greece
| | - John Tsiaoussis
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71110 Heraklion, Greece
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Kopjar N, Garaj-Vrhovac V, Milas I. Acute Cytogenetic Effects of Antineoplastic Drugs on Peripheral Blood Lymphocytes in Cancer Patients Chromosome Aberrations and Micronuclei. Tumori 2018; 88:300-12. [PMID: 12400982 DOI: 10.1177/030089160208800412] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aims and Background The aim of the present study was to evaluate the individual sensitivity of cancer patients to different antineoplastic drugs administered in standard protocols by assessing their acute cytogenetic effects on peripheral blood lymphocytes. Methods and Study Design In 12 patients undergoing cancer chemotherapy, acute cytogenetic effects on peripheral blood lymphocytes were evaluated by analysis of structural chromosome aberrations and micronuclei. All patients were given antineoplastic drugs, mainly as polychemotherapy. The frequencies of both cytogenetic biomarkers determined after the first chemotherapy cycle were compared with their pre-treatment (baseline) values. Results All chemotherapy protocols employed induced clear cytogenetic effects in both tests studied. The results obtained indicate interindividual variations between cytogenetic damage in peripheral blood lymphocytes among cancer patients. Statistically significant increases in the total number of structural chromosome aberrations and micronuclei in lymphocytes analyzed after chemotherapy compared to pre-therapy samples were observed in almost all patients studied. The highest level of chromosome damage as well as the highest incidence of micronuclei was observed following administration of the ACOP protocol (adriamycin, cyclophosphamide and vincristine). The proportions of signal-positive and signal-negative micronuclei were evaluated using DAPI staining, while silver staining revealed Ag-NOR+ and Ag-NOR− micronuclei. In some patients the incidence of signal-positive and Ag-NOR+ micronuclei after treatment was increased, indicating a more pronounced susceptibility of particular chromosomes to damage caused by antineoplastic drugs. Conclusions With regard to the results obtained we may conclude that both parameters used in the present study on peripheral lymphocytes are sensitive biomarkers and can be successfully employed for biomonitoring of acute cytogenetic effects induced by antineoplastic drugs in standard clinical protocols for cancer treatment.
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Affiliation(s)
- Nevenka Kopjar
- Laboratory of Mutagenesis, Institute for Medical Research and Occupational Health, Zagreb, Croatia.
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Sayed AEDH, Kataoka C, Oda S, Kashiwada S, Mitani H. Sensitivity of medaka (Oryzias latipes) to 4-nonylphenol subacute exposure; erythrocyte alterations and apoptosis. Environ Toxicol Pharmacol 2018; 58:98-104. [PMID: 29306823 DOI: 10.1016/j.etap.2017.12.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 11/14/2017] [Revised: 12/22/2017] [Accepted: 12/23/2017] [Indexed: 02/07/2023]
Abstract
The present study was undertaken to assess the effects of the endocrine-disrupting compound; 4-nonylphenol (4-NP) in medaka (Oryzias latipes). The frequencies of erythrocyte alterations, apoptosis, and micronuclei were used as biological indicators of damage. Medaka were exposed 15 days to 4-NP at three sublethal concentrations (50, 80, and 100 μg/l 4-NP) and results compared with those of a previous study using catfish as an animal model. Exposure of medaka resulted in a dose-dependent increase in the frequency of erythrocyte alterations, apoptosis and micronucleus (MN). Many morphological alterations and nuclear abnormalities were observed, including acanthocytes, lobed nucleus, eccentric nucleus, fragmented nucleus, blebbed nucleus, binuclei, deformed nucleus, notched nucleus, hemolysed cells, crenated cells, teardrop-like cells, and schistocytes. Mortality was recorded after treatment with 80 and 100 μg/l 4-NP, indicating that medaka are more sensitive than catfish to 4-NP exposure. We concluded that, 4-NP causes several malformations in the shape and number of erythrocytes in medaka, indicating its genotoxicity.
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Affiliation(s)
- Alaa El-Din H Sayed
- Zoology department, Faculty of Science, Assiut University, 71516 Assiut, Egypt; Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan.
| | - Chisato Kataoka
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura, Gunma 374-0193, Japan
| | - Shoji Oda
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan
| | - Shosaku Kashiwada
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura, Gunma 374-0193, Japan; Research Center of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura, Gunma 374-0193, Japan
| | - Hiroshi Mitani
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan
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