1
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Forer A, Otsuka S. Structural evidence for elastic tethers connecting separating chromosomes in crane-fly spermatocytes. Life Sci Alliance 2023; 6:e202302303. [PMID: 37591724 PMCID: PMC10435969 DOI: 10.26508/lsa.202302303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023] Open
Abstract
Different types of anaphase bridges are reported to form between segregating chromosomes during cell division. Previous studies using laser microsurgery suggested that elastic tethers connect the telomeres of separating anaphase chromosomes in many animal meiotic and mitotic cells. However, structural evidence is lacking for their existence. In this study, by correlating live imaging with electron tomography, we examined whether visible structures connect separating telomeres in meiosis I of crane-fly primary spermatocytes. We found structures extending between separating telomeres in all stages of anaphase. The structures consist of two components: one is darkly stained, looking somewhat like chromatin, whereas the other is more lightly stained, appearing filamentous. Although in early anaphase both structures extend between telomeres, in later anaphase, the darker structure extends shorter distances from the telomeres but the lighter structure still extends between the separating telomeres. From these observations, we deduced that these structures represent the "tethers" inferred from the laser-cutting experiments. Because elastic tethers have been detected in a variety of animal cells, they probably are present during anaphase in all animal cells.
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Affiliation(s)
- Arthur Forer
- Biology Department, York University, North York, Canada
| | - Shotaro Otsuka
- Max Perutz Labs, Vienna Biocenter Campus, Vienna, Austria
- Medical University of Vienna, Center for Medical Biochemistry, Vienna, Austria
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2
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Antequera-Parrilla P, Castillo-Acosta VM, Bosch-Navarrete C, Ruiz-Pérez LM, González-Pacanowska D. A nuclear orthologue of the dNTP triphosphohydrolase SAMHD1 controls dNTP homeostasis and genomic stability in Trypanosoma brucei. Front Cell Infect Microbiol 2023; 13:1241305. [PMID: 37674581 PMCID: PMC10478004 DOI: 10.3389/fcimb.2023.1241305] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 08/07/2023] [Indexed: 09/08/2023] Open
Abstract
Maintenance of dNTPs pools in Trypanosoma brucei is dependent on both biosynthetic and degradation pathways that together ensure correct cellular homeostasis throughout the cell cycle which is essential for the preservation of genomic stability. Both the salvage and de novo pathways participate in the provision of pyrimidine dNTPs while purine dNTPs are made available solely through salvage. In order to identify enzymes involved in degradation here we have characterized the role of a trypanosomal SAMHD1 orthologue denominated TbHD82. Our results show that TbHD82 is a nuclear enzyme in both procyclic and bloodstream forms of T. brucei. Knockout forms exhibit a hypermutator phenotype, cell cycle perturbations and an activation of the DNA repair response. Furthermore, dNTP quantification of TbHD82 null mutant cells revealed perturbations in nucleotide metabolism with a substantial accumulation of dATP, dCTP and dTTP. We propose that this HD domain-containing protein present in kinetoplastids plays an essential role acting as a sentinel of genomic fidelity by modulating the unnecessary and detrimental accumulation of dNTPs.
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Affiliation(s)
| | - Víctor M. Castillo-Acosta
- Instituto de Parasitología y Biomedicina “López-Neyra, Consejo Superior de Investigaciones Científicas, Parque Tecnológico de Ciencias de la Salud, Granada, Spain
| | | | | | - Dolores González-Pacanowska
- Instituto de Parasitología y Biomedicina “López-Neyra, Consejo Superior de Investigaciones Científicas, Parque Tecnológico de Ciencias de la Salud, Granada, Spain
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3
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Cytidine deaminase activity increases in the blood of breast cancer patients. Sci Rep 2022; 12:14062. [PMID: 35982128 PMCID: PMC9388666 DOI: 10.1038/s41598-022-18462-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 08/12/2022] [Indexed: 11/09/2022] Open
Abstract
Cytidine deaminase (CDA), an enzyme of the pyrimidine salvage pathway, deaminates cytidine, deoxycytidine and analogs, such as gemcitabine. Constitutive low levels of CDA activity have been reported in the blood of patients with hematological malignancies or suffering from gemcitabine toxicity. We previously reported that cellular CDA deficiency leads to genetic instability. We therefore hypothesized that constitutive CDA deficiency might confer a predisposition to cancer. We analyzed CDA activity and expression in blood samples from breast cancer (BC) patients with a suspected predisposition to the disease, and in healthy controls. Contrary to our hypothesis, we found that both CDA activity and mRNA levels were higher in blood samples from BC patients than in those from controls, and that this difference was not due to excess neutrophils. CDA activity levels were significantly higher in the serum samples of BC patients treated by radiotherapy (RT) than in those of untreated healthy controls, and hormone therapy in RT-treated BC patients was associated with significantly lower levels of CDA activity. A preliminary analysis of CDA activity in the serum of the very few BC patients who had undergone no treatment other than surgery suggested that the increase in CDA activity might be due to the breast cancer itself. Our findings raise important questions, which should lead to studies to elucidate the origin and significance of the increase in CDA activity in the serum of BC patients, and the impact of hormone therapy.
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4
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Mameri H, Buhagiar-Labarchède G, Fontaine G, Corcelle C, Barette C, Onclercq-Delic R, Beauvineau C, Mahuteau-Betzer F, Amor-Guéret M. Cytidine deaminase deficiency in tumor cells is associated with sensitivity to a naphthol derivative and a decrease in oncometabolite levels. Cell Mol Life Sci 2022; 79:465. [PMID: 35925417 PMCID: PMC9352748 DOI: 10.1007/s00018-022-04487-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/01/2022] [Accepted: 07/13/2022] [Indexed: 11/19/2022]
Abstract
Identifying new molecular targets for novel anticancer treatments is a major challenge in clinical cancer research. We have shown that cytidine deaminase (CDA) expression is downregulated in about 60% of cancer cells and tissues. In this study, we aimed to develop a new anticancer treatment specifically inhibiting the growth of CDA-deficient tumor cells. High-throughput screening of a chemical library led to the identification of a naphthol derivative, X55, targeting CDA-deficient tumor cells preferentially, without affecting the growth of non-tumoral cells regardless of CDA expression status. Metabolomic profiling revealed that CDA-deficient HeLa cells differed markedly from control HeLa cells. X55 treatment had a moderate effect on control cells, but greatly disturbed the metabolome of CDA-deficient HeLa cells, worsening the deregulation of many metabolites. In particular, the levels of the three oncometabolites, fumarate, succinate and 2-hydroxyglutarate, were significantly lower in CDA-depleted cells, and this decrease in levels was exacerbated by X55 treatment, revealing an unexpected link between CDA deficiency, mitochondrial function and X55 response. Finally, we identified strong downregulation of MAPT (encoding Tau, a microtubule associated protein) expression as a reliable predictive marker for tumor cell X55 sensitivity.
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Affiliation(s)
- Hamza Mameri
- Institut Curie, PSL Research University, CNRS UMR 3348, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 3348, 91405, Orsay, France.,Present address: UMR 1208 IATE, Montpellier University, INRAE, Institut Agro, 34060, Montpellier, France
| | - Géraldine Buhagiar-Labarchède
- Institut Curie, PSL Research University, CNRS UMR 3348, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 3348, 91405, Orsay, France
| | - Gaëlle Fontaine
- Institut Curie, PSL Research University, CNRS UMR 3348, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 3348, 91405, Orsay, France
| | - Céline Corcelle
- Institut Curie, PSL Research University, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France.,CNRS UMR 9187, INSERM, U1196, Centre Universitaire, Bât. 110, 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France
| | - Caroline Barette
- CEA/IRIG/Gen & Chem, Univ. Grenoble Alpes, 38000, Grenoble, France
| | - Rosine Onclercq-Delic
- Institut Curie, PSL Research University, CNRS UMR 3348, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 3348, 91405, Orsay, France
| | - Claire Beauvineau
- Institut Curie, PSL Research University, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France.,CNRS UMR 9187, INSERM, U1196, Centre Universitaire, Bât. 110, 91405, Orsay, France.,Université Paris-Saclay, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France
| | - Florence Mahuteau-Betzer
- Institut Curie, PSL Research University, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France. .,CNRS UMR 9187, INSERM, U1196, Centre Universitaire, Bât. 110, 91405, Orsay, France. .,Université Paris-Saclay, CNRS UMR 9187, INSERM U1196, 91405, Orsay, France.
| | - Mounira Amor-Guéret
- Institut Curie, PSL Research University, CNRS UMR 3348, 91405, Orsay, France. .,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France. .,Université Paris-Saclay, CNRS UMR 3348, 91405, Orsay, France.
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5
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Sikder S, Arunkumar G, Melters DP, Dalal Y. Breaking the aging epigenetic barrier. Front Cell Dev Biol 2022; 10:943519. [PMID: 35966762 PMCID: PMC9366916 DOI: 10.3389/fcell.2022.943519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
Aging is an inexorable event occurring universally for all organisms characterized by the progressive loss of cell function. However, less is known about the key events occurring inside the nucleus in the process of aging. The advent of chromosome capture techniques and extensive modern sequencing technologies have illuminated a rather dynamic structure of chromatin inside the nucleus. As cells advance along their life cycle, chromatin condensation states alter which leads to a different epigenetic landscape, correlated with modified gene expression. The exact factors mediating these changes in the chromatin structure and function remain elusive in the context of aging cells. The accumulation of DNA damage, reactive oxygen species and loss of genomic integrity as cells cease to divide can contribute to a tumor stimulating environment. In this review, we focus on genomic and epigenomic changes occurring in an aged cell which can contribute to age-related tumor formation.
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6
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Chanboonyasitt P, Chan YW. Regulation of mitotic chromosome architecture and resolution of ultrafine anaphase bridges by PICH. Cell Cycle 2021; 20:2077-2090. [PMID: 34530686 PMCID: PMC8565832 DOI: 10.1080/15384101.2021.1970877] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/28/2021] [Accepted: 08/16/2021] [Indexed: 11/30/2022] Open
Abstract
To ensure genome stability, chromosomes need to undergo proper condensation into two linked sister chromatids from prophase to prometaphase, followed by equal segregation at anaphase. Emerging evidence has shown that persistent DNA entanglements connecting the sister chromatids lead to the formation of ultrafine anaphase bridges (UFBs). If UFBs are not resolved soon after anaphase, they can induce chromosome missegregation. PICH (PLK1-interacting checkpoint helicase) is a DNA translocase that localizes on chromosome arms, centromeres and UFBs. It plays multiple essential roles in mitotic chromosome organization and segregation. PICH also recruits other associated proteins to UFBs, and together they mediate UFB resolution. Here, the proposed mechanism behind PICH's functions in chromosome organization and UFB resolution will be discussed. We summarize the regulation of PICH action at chromosome arms and centromeres, how PICH recognizes UFBs and recruits other UFB-associated factors, and finally how PICH promotes UFB resolution together with other DNA processing enzymes.
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Affiliation(s)
| | - Ying Wai Chan
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
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7
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Abstract
Ultrafine anaphase bridges (UFBs) result from a defect in sister chromatid segregation during anaphase. They arise from particular DNA structures, mostly generated at specific loci in the human genome, such as centromeres, common fragile sites, telomeres, or ribosomal DNA. Increases in UFB frequency are a marker of genetic instability, and their detection has become a classic way of detecting such genetic instability over the last decade. Here we describe a protocol to stain different types of UFBs in adherent human cells.
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Affiliation(s)
- Simon Gemble
- Institut Curie, PSL Research University, CNRS UMR144, Paris, France
| | - Mounira Amor-Guéret
- Institut Curie, PSL Research University, CNRS UMR 3348, Orsay, France.
- CNRS UMR 3348, Paris Saclay University, Institut Curie, Research Center, Orsay, France.
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8
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Silveira SC, Buhagiar-Labarchède G, Onclercq-Delic R, Gemble S, Bou Samra E, Mameri H, Duchambon P, Machon C, Guitton J, Amor-Guéret M. A decrease in NAMPT activity impairs basal PARP-1 activity in cytidine deaminase deficient-cells, independently of NAD .. Sci Rep 2020; 10:13907. [PMID: 32807821 PMCID: PMC7431583 DOI: 10.1038/s41598-020-70874-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/03/2020] [Indexed: 11/09/2022] Open
Abstract
Cytidine deaminase (CDA) deficiency causes pyrimidine pool disequilibrium. We previously reported that the excess cellular dC and dCTP resulting from CDA deficiency jeopardizes genome stability, decreasing basal poly(ADP-ribose) polymerase 1 (PARP-1) activity and increasing ultrafine anaphase bridge (UFB) formation. Here, we investigated the mechanism underlying the decrease in PARP-1 activity in CDA-deficient cells. PARP-1 activity is dependent on intracellular NAD+ concentration. We therefore hypothesized that defects of the NAD+ salvage pathway might result in decreases in PARP-1 activity. We found that the inhibition or depletion of nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme in the NAD+ salvage biosynthesis pathway, mimicked CDA deficiency, resulting in a decrease in basal PARP-1 activity, regardless of NAD+ levels. Furthermore, the expression of exogenous wild-type NAMPT fully restored basal PARP-1 activity and prevented the increase in UFB frequency in CDA-deficient cells. No such effect was observed with the catalytic mutant. Our findings demonstrate that (1) the inhibition of NAMPT activity in CDA-proficient cells lowers basal PARP-1 activity, and (2) the expression of exogenous wild-type NAMPT, but not of the catalytic mutant, fully restores basal PARP-1 activity in CDA-deficient cells; these results strongly suggest that basal PARP-1 activity in CDA-deficient cells decreases due to a reduction of NAMPT activity.
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Affiliation(s)
- Sandra Cunha Silveira
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Géraldine Buhagiar-Labarchède
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Rosine Onclercq-Delic
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Simon Gemble
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Elias Bou Samra
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Hamza Mameri
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France.,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France
| | - Patricia Duchambon
- Protein Expression and Purification Core Facility, Institut Curie, PSL Research University, 75248, Paris, France.,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 9187 - INSERM U1196, 91405, Orsay, France
| | - Christelle Machon
- Laboratoire de Biochimie et Toxicologie, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Pierre-Bénite, France.,Laboratoire de Chimie Analytique, ISPB, Faculté de Pharmacie, Université Lyon 1, Université de Lyon, Lyon, France
| | - Jérôme Guitton
- Laboratoire de Biochimie et Toxicologie, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Pierre-Bénite, France.,Laboratoire de Toxicologie, ISPB, Faculté de Pharmacie, Université Lyon 1, Université de Lyon, Lyon, France
| | - Mounira Amor-Guéret
- Institut Curie, UMR 3348, PSL Research University, 91405, Orsay, France. .,CNRS UMR 3348, Centre Universitaire, 91405, Orsay, France. .,Université Paris Sud, Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405, Orsay, France.
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9
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Gemble S, Buhagiar-Labarchède G, Onclercq-Delic R, Fontaine G, Lambert S, Amor-Guéret M. Topoisomerase IIα prevents ultrafine anaphase bridges by two mechanisms. Open Biol 2020; 10:190259. [PMID: 32400307 PMCID: PMC7276528 DOI: 10.1098/rsob.190259] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Topoisomerase IIα (Topo IIα), a well-conserved double-stranded DNA (dsDNA)-specific decatenase, processes dsDNA catenanes resulting from DNA replication during mitosis. Topo IIα defects lead to an accumulation of ultrafine anaphase bridges (UFBs), a type of chromosome non-disjunction. Topo IIα has been reported to resolve DNA anaphase threads, possibly accounting for the increase in UFB frequency upon Topo IIα inhibition. We hypothesized that the excess UFBs might also result, at least in part, from an impairment of the prevention of UFB formation by Topo IIα. We found that Topo IIα inhibition promotes UFB formation without affecting the global disappearance of UFBs during mitosis, but leads to an aberrant UFB resolution generating DNA damage within the next G1. Moreover, we demonstrated that Topo IIα inhibition promotes the formation of two types of UFBs depending on cell cycle phase. Topo IIα inhibition during S-phase compromises complete DNA replication, leading to the formation of UFB-containing unreplicated DNA, whereas Topo IIα inhibition during mitosis impedes DNA decatenation at metaphase–anaphase transition, leading to the formation of UFB-containing DNA catenanes. Thus, Topo IIα activity is essential to prevent UFB formation in a cell-cycle-dependent manner and to promote DNA damage-free resolution of UFBs.
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Affiliation(s)
- Simon Gemble
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
| | - Géraldine Buhagiar-Labarchède
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
| | - Rosine Onclercq-Delic
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
| | - Gaëlle Fontaine
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
| | - Sarah Lambert
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
| | - Mounira Amor-Guéret
- Institut Curie, PSL Research University, UMR 3348, Centre de Recherche, Orsay, France.,CNRS UMR 3348, Centre Universitaire, Bât. 110. 91405, Orsay, France.,Université Paris Saclay, UMR 3348, Centre Universitaire d'Orsay, France
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10
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MUC1 oncoprotein mitigates ER stress via CDA-mediated reprogramming of pyrimidine metabolism. Oncogene 2020; 39:3381-3395. [PMID: 32103170 PMCID: PMC7165067 DOI: 10.1038/s41388-020-1225-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/12/2020] [Accepted: 02/14/2020] [Indexed: 12/12/2022]
Abstract
The Mucin 1 (MUC1) protein is overexpressed in various cancers and mediates chemotherapy resistance. However, the mechanism is not fully understood. Given that most chemotherapeutic drugs disrupt ER homeostasis as part of their toxicity, and MUC1 expression is regulated by proteins involved in ER homeostasis, we investigated the link between MUC1 and ER homeostasis. MUC1 knockdown in pancreatic cancer cells enhanced unfolded protein response (UPR) signaling and cell death upon ER stress induction. Transcriptomic analysis revealed alterations in the pyrimidine metabolic pathway and cytidine deaminase (CDA). ChIP and CDA activity assays showed that MUC1 occupied CDA gene promoter upon ER stress induction correlating with increased CDA expression and activity in MUC1-expressing cells as compared to MUC1 knockdown cells. Inhibition of either the CDA or pyrimidine metabolic pathway diminished survival in MUC1-expressing cancer cells upon ER stress induction. Metabolomic analysis demonstrated that MUC1-mediated CDA activity corresponded to deoxycytidine to deoxyuridine metabolic reprogramming upon ER stress induction. The resulting increase in deoxyuridine mitigated ER stress-induced cytotoxicity. Additionally, given 1) the established roles of MUC1 in protecting cells against reactive oxygen species (ROS) insults, 2) ER stress-generated ROS further promote ER stress and 3) the emerging anti-oxidant property of deoxyuridine, we further investigated if MUC1 regulated ER stress by a deoxyuridine-mediated modulation of ROS levels. We observed that deoxyuridine could abrogate ROS-induced ER stress to promote cancer cell survival. Taken together, our findings demonstrate a novel MUC1-CDA axis of the adaptive UPR that provides survival advantage upon ER stress induction.
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11
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Frances A, Cordelier P. The Emerging Role of Cytidine Deaminase in Human Diseases: A New Opportunity for Therapy? Mol Ther 2019; 28:357-366. [PMID: 31870623 DOI: 10.1016/j.ymthe.2019.11.026] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/14/2019] [Accepted: 11/25/2019] [Indexed: 12/23/2022] Open
Abstract
The recycling activity of cytidine deaminase (CDA) within the pyrimidine salvage pathway is essential to DNA and RNA synthesis. As such, CDA deficiency can lead to replicative stress, notably in Bloom syndrome. Alternatively, CDA also can deaminate cytidine and deoxycytidine analog-based therapies, such as gemcitabine. Thus, CDA overexpression is often associated with lower systemic, chemotherapy-related, adverse effects but also with resistance to treatment. Considering the increasing interest of CDA in cancer chemoresistance, the aims of this review are to describe CDA structure, regulation of expression, and activity, and to report the therapeutic strategies based on CDA expression that recently emerged for tumor treatment.
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Affiliation(s)
- Audrey Frances
- Université Fédérale de Toulouse Midi-Pyrénées, Université Toulouse III Paul Sabatier, INSERM, Cancer Research Center of Toulouse (CRCT), Toulouse, France
| | - Pierre Cordelier
- Université Fédérale de Toulouse Midi-Pyrénées, Université Toulouse III Paul Sabatier, INSERM, Cancer Research Center of Toulouse (CRCT), Toulouse, France.
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12
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Mauney CH, Hollis T. SAMHD1: Recurring roles in cell cycle, viral restriction, cancer, and innate immunity. Autoimmunity 2018; 51:96-110. [PMID: 29583030 PMCID: PMC6117824 DOI: 10.1080/08916934.2018.1454912] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 03/16/2018] [Indexed: 12/24/2022]
Abstract
Sterile alpha motif and histidine-aspartic acid domain-containing protein 1 (SAMHD1) is a deoxynucleotide triphosphate (dNTP) hydrolase that plays an important role in the homeostatic balance of cellular dNTPs. Its emerging role as an effector of innate immunity is affirmed by mutations in the SAMHD1 gene that cause the severe autoimmune disease, Aicardi-Goutieres syndrome (AGS) and that are linked to cancer. Additionally, SAMHD1 functions as a restriction factor for retroviruses, such as HIV. Here, we review the current biochemical and biological properties of the enzyme including its structure, activity, and regulation by post-translational modifications in the context of its cellular function. We outline open questions regarding the biology of SAMHD1 whose answers will be important for understanding its function as a regulator of cell cycle progression, genomic integrity, and in autoimmunity.
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Affiliation(s)
- Christopher H Mauney
- a Department of Biochemistry , Center for Structural Biology, Wake Forest School of Medicine , Winston Salem , NC , USA
| | - Thomas Hollis
- a Department of Biochemistry , Center for Structural Biology, Wake Forest School of Medicine , Winston Salem , NC , USA
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13
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Hoffmann JS, Cordelier P. Proper sister chromatid disjunction requires CDA and PARP-1. Cell Cycle 2017; 16:1239-1240. [PMID: 28598299 DOI: 10.1080/15384101.2017.1326767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Jean-Sébastien Hoffmann
- a Equipe « Labellisée Ligue contre le Cancer», Laboratoire d'excellence TOUCAN , INSERM U 1037; CNRS ERL 5294; CRCT (Cancer Research Center of Toulouse) , Oncopole , Toulouse , France.,b Université Paul Sabatier, University of Toulouse III , Toulouse , France
| | - Pierre Cordelier
- a Equipe « Labellisée Ligue contre le Cancer», Laboratoire d'excellence TOUCAN , INSERM U 1037; CNRS ERL 5294; CRCT (Cancer Research Center of Toulouse) , Oncopole , Toulouse , France.,b Université Paul Sabatier, University of Toulouse III , Toulouse , France
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14
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Gemble S, Buhagiar-Labarchède G, Onclercq-Delic R, Jaulin C, Amor-Guéret M. Cytidine deaminase deficiency impairs sister chromatid disjunction by decreasing PARP-1 activity. Cell Cycle 2017; 16:1128-1135. [PMID: 28463527 DOI: 10.1080/15384101.2017.1317413] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Bloom Syndrome (BS) is a rare genetic disease characterized by high levels of chromosomal instability and an increase in cancer risk. Cytidine deaminase (CDA) expression is downregulated in BS cells, leading to an excess of cellular dC and dCTP that reduces basal PARP-1 activity, compromising optimal Chk1 activation and reducing the efficiency of downstream checkpoints. This process leads to the accumulation of unreplicated DNA during mitosis and, ultimately, ultrafine anaphase bridge (UFB) formation. BS cells also display incomplete sister chromatid disjunction when depleted of cohesin. Using a combination of fluorescence in situ hybridization and chromosome spreads, we investigated the possible role of CDA deficiency in the incomplete sister chromatid disjunction in cohesin-depleted BS cells. The decrease in basal PARP-1 activity in CDA-deficient cells compromised sister chromatid disjunction in cohesin-depleted cells, regardless of BLM expression status. The observed incomplete sister chromatid disjunction may be due to the accumulation of unreplicated DNA during mitosis in CDA-deficient cells, as reflected in the changes in centromeric DNA structure associated with the decrease in basal PARP-1 activity. Our findings reveal a new function of PARP-1 in sister chromatid disjunction during mitosis.
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Affiliation(s)
- Simon Gemble
- a Institut Curie, PSL Research University, UMR 3348, Unité Stress Génotoxiques et Cancer, Centre de Recherche , Orsay , France.,b CNRS UMR 3348, Centre Universitaire , Orsay , France.,c Université Paris Sud , Université Paris Saclay, UMR3348, Centre Universitaire d'Orsay , France
| | - Géraldine Buhagiar-Labarchède
- a Institut Curie, PSL Research University, UMR 3348, Unité Stress Génotoxiques et Cancer, Centre de Recherche , Orsay , France.,b CNRS UMR 3348, Centre Universitaire , Orsay , France.,c Université Paris Sud , Université Paris Saclay, UMR3348, Centre Universitaire d'Orsay , France
| | - Rosine Onclercq-Delic
- a Institut Curie, PSL Research University, UMR 3348, Unité Stress Génotoxiques et Cancer, Centre de Recherche , Orsay , France.,b CNRS UMR 3348, Centre Universitaire , Orsay , France.,c Université Paris Sud , Université Paris Saclay, UMR3348, Centre Universitaire d'Orsay , France
| | - Christian Jaulin
- d Institut de Génétique et Développement de Rennes, Equipe Epigénétique et Cancer, UMR 6290 CNRS, Université Rennes 1 , Rennes Cedex , France
| | - Mounira Amor-Guéret
- a Institut Curie, PSL Research University, UMR 3348, Unité Stress Génotoxiques et Cancer, Centre de Recherche , Orsay , France.,b CNRS UMR 3348, Centre Universitaire , Orsay , France.,c Université Paris Sud , Université Paris Saclay, UMR3348, Centre Universitaire d'Orsay , France
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15
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Pai CC, Kearsey SE. A Critical Balance: dNTPs and the Maintenance of Genome Stability. Genes (Basel) 2017; 8:genes8020057. [PMID: 28146119 PMCID: PMC5333046 DOI: 10.3390/genes8020057] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 01/24/2017] [Indexed: 01/14/2023] Open
Abstract
A crucial factor in maintaining genome stability is establishing deoxynucleoside triphosphate (dNTP) levels within a range that is optimal for chromosomal replication. Since DNA replication is relevant to a wide range of other chromosomal activities, these may all be directly or indirectly affected when dNTP concentrations deviate from a physiologically normal range. The importance of understanding these consequences is relevant to genetic disorders that disturb dNTP levels, and strategies that inhibit dNTP synthesis in cancer chemotherapy and for treatment of other disorders. We review here how abnormal dNTP levels affect DNA replication and discuss the consequences for genome stability.
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Affiliation(s)
- Chen-Chun Pai
- CRUK-MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, ORCRB, Roosevelt Drive, Oxford OX3 7DQ, UK.
| | - Stephen E Kearsey
- Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.
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