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Tremblay R, Mehrjoo Y, Ahmed O, Simoneau A, McQuaid ME, Affar EB, Nislow C, Giaever G, Wurtele H. Persistent Acetylation of Histone H3 Lysine 56 Compromises the Activity of DNA Replication Origins. Mol Cell Biol 2023; 43:566-595. [PMID: 37811746 PMCID: PMC10791153 DOI: 10.1080/10985549.2023.2259739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 08/09/2023] [Indexed: 10/10/2023] Open
Abstract
In Saccharomyces cerevisiae, newly synthesized histones H3 are acetylated on lysine 56 (H3 K56ac) by the Rtt109 acetyltransferase prior to their deposition on nascent DNA behind replication forks. Two deacetylases of the sirtuin family, Hst3 and Hst4, remove H3 K56ac from chromatin after S phase. hst3Δ hst4Δ cells present constitutive H3 K56ac, which sensitizes cells to replicative stress via unclear mechanisms. A chemogenomic screen revealed that DBF4 heterozygosity sensitizes cells to NAM-induced inhibition of sirtuins. DBF4 and CDC7 encode subunits of the Dbf4-dependent kinase (DDK), which activates origins of DNA replication during S phase. We show that (i) cells harboring the dbf4-1 or cdc7-4 hypomorphic alleles are sensitized to NAM, and that (ii) the sirtuins Sir2, Hst1, Hst3, and Hst4 promote DNA replication in cdc7-4 cells. We further demonstrate that Rif1, an inhibitor of DDK-dependent activation of origins, causes DNA damage and replication defects in NAM-treated cells and hst3Δ hst4Δ mutants. cdc7-4 hst3Δ hst4Δ cells are shown to display delayed initiation of DNA replication, which is not due to intra-S checkpoint activation but requires Rtt109-dependent H3 K56ac. Our results suggest that constitutive H3 K56ac sensitizes cells to replicative stress in part by negatively influencing the activation of origins of DNA replication.
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Affiliation(s)
- Roch Tremblay
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Molecular Biology Program, Université de Montréal, Montreal, Québec, Canada
| | - Yosra Mehrjoo
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Molecular Biology Program, Université de Montréal, Montreal, Québec, Canada
| | - Oumaima Ahmed
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Molecular Biology Program, Université de Montréal, Montreal, Québec, Canada
| | - Antoine Simoneau
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Molecular Biology Program, Université de Montréal, Montreal, Québec, Canada
| | - Mary E. McQuaid
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
| | - El Bachir Affar
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
| | - Corey Nislow
- Department of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Guri Giaever
- Department of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hugo Wurtele
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Québec, Canada
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
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Gupta R, Ambasta RK, Kumar P. Multifaced role of protein deacetylase sirtuins in neurodegenerative disease. Neurosci Biobehav Rev 2021; 132:976-997. [PMID: 34742724 DOI: 10.1016/j.neubiorev.2021.10.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/28/2021] [Accepted: 10/28/2021] [Indexed: 01/07/2023]
Abstract
Sirtuins, a class III histone/protein deacetylase, is a central regulator of metabolic function and cellular stress response. This plays a pivotal role in the pathogenesis and progression of diseases such as cancer, neurodegeneration, metabolic syndromes, and cardiovascular disease. Sirtuins regulate biological and cellular processes, for instance, mitochondrial biogenesis, lipid and fatty acid oxidation, oxidative stress, gene transcriptional activity, apoptosis, inflammatory response, DNA repair mechanism, and autophagic cell degradation, which are known components for the progression of the neurodegenerative diseases (NDDs). Emerging evidence suggests that sirtuins are the useful molecular targets against NDDs like, Alzheimer's Disease (AD), Parkinson's Disease (PD), Huntington's Disease (HD), and Amyotrophic Lateral Sclerosis (ALS). However, the exact mechanism of neuroprotection mediated through sirtuins remains unsettled. The manipulation of sirtuins activity with its modulators, calorie restriction (CR), and micro RNAs (miR) is a novel therapeutic approach for the treatment of NDDs. Herein, we reviewed the current putative therapeutic role of sirtuins in regulating synaptic plasticity and cognitive functions, which are mediated through the different molecular phenomenon to prevent neurodegeneration. We also explained the implications of sirtuin modulators, and miR based therapies for the treatment of life-threatening NDDs.
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Affiliation(s)
- Rohan Gupta
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly DCE), Delhi 110042, India
| | - Rashmi K Ambasta
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly DCE), Delhi 110042, India
| | - Pravir Kumar
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly DCE), Delhi 110042, India.
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Hammond-Martel I, Verreault A, Wurtele H. Chromatin dynamics and DNA replication roadblocks. DNA Repair (Amst) 2021; 104:103140. [PMID: 34087728 DOI: 10.1016/j.dnarep.2021.103140] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/27/2022]
Abstract
A broad spectrum of spontaneous and genotoxin-induced DNA lesions impede replication fork progression. The DNA damage response that acts to promote completion of DNA replication is associated with dynamic changes in chromatin structure that include two distinct processes which operate genome-wide during S-phase. The first, often referred to as histone recycling or parental histone segregation, is characterized by the transfer of parental histones located ahead of replication forks onto nascent DNA. The second, known as de novo chromatin assembly, consists of the deposition of new histone molecules onto nascent DNA. Because these two processes occur at all replication forks, their potential to influence a multitude of DNA repair and DNA damage tolerance mechanisms is considerable. The purpose of this review is to provide a description of parental histone segregation and de novo chromatin assembly, and to illustrate how these processes influence cellular responses to DNA replication roadblocks.
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Affiliation(s)
- Ian Hammond-Martel
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, 5415 boulevard de l'Assomption, Montreal, H1T 2M4, Canada
| | - Alain Verreault
- Institute for Research in Immunology and Cancer, Université de Montréal, P.O. Box 6128, Succursale Centre-Ville, Montreal, H3C 3J7, Canada; Département de Pathologie et Biologie Cellulaire, Université de Montréal, 2900 Edouard Montpetit Blvd, Montreal, H3T 1J4, Canada
| | - Hugo Wurtele
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, 5415 boulevard de l'Assomption, Montreal, H1T 2M4, Canada; Département de Médecine, Université de Montréal, Université de Montréal, 2900 Edouard Montpetit Blvd, Montreal, H3T 1J4, Canada.
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4
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Tan YJ, Lee YT, Petersen SH, Kaur G, Kono K, Tan SC, Majid AMSA, Oon CE. BZD9L1 sirtuin inhibitor as a potential adjuvant for sensitization of colorectal cancer cells to 5-fluorouracil. Ther Adv Med Oncol 2019; 11:1758835919878977. [PMID: 31632470 PMCID: PMC6767736 DOI: 10.1177/1758835919878977] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/06/2019] [Indexed: 02/06/2023] Open
Abstract
Background: This study aims to investigate the combination effect of a novel sirtuin
inhibitor (BZD9L1) with 5-fluorouracil (5-FU) and to determine its molecular
mechanism of action in colorectal cancer (CRC). Methods: BZD9L1 and 5-FU either as single treatment or in combination were tested
against CRC cells to evaluate synergism in cytotoxicity, senescence and
formation of micronucleus, cell cycle and apoptosis, as well as the
regulation of related molecular players. The effects of combined treatments
at different doses on stress and apoptosis, migration, invasion and cell
death mechanism were evaluated through two-dimensional and three-dimensional
cultures. In vivo studies include investigation on the
combination effects of BZD9L1 and 5-FU on colorectal tumour xenograft growth
and an evaluation of tumour proliferation and apoptosis using
immunohistochemistry. Results: Combination treatments exerted synergistic reduction on cell viability on HCT
116 cells but not on HT-29 cells. Combined treatments reduced survival,
induced cell cycle arrest, apoptosis, senescence and micronucleation in HCT
116 cells through modulation of multiple responsible molecular players and
apoptosis pathways, with no effect in epithelial mesenchymal transition
(EMT). Combination treatments regulated SIRT1 and SIRT2 protein expression
levels differently and changed SIRT2 protein localization. Combined
treatment reduced growth, migration, invasion and viability of HCT 116
spheroids through apoptosis, when compared with the single treatment. In
addition, combined treatment was found to reduce tumour growth in
vivo through reduction of tumour proliferation and necrosis
compared with the vehicle control group. This highlights the potential
therapeutic effects of BZD9L1 and 5-FU towards CRC. Conclusion: This study may pave the way for use of BZD9L1 as an adjuvant to 5-FU in
improving the therapeutic efficacy for the treatment of colorectal
cancer.
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Affiliation(s)
- Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Sven H Petersen
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Koji Kono
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Soo Choon Tan
- USains Biomics Laboratory Testing Services Sdn. Bhd., Universiti Sains Malaysia, Penang, Malaysia
| | - Amin M S Abdul Majid
- EMAN Testing and Research Laboratories, Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, 11800, Malaysia
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Jolivet P, Serhal K, Graf M, Eberhard S, Xu Z, Luke B, Teixeira MT. A subtelomeric region affects telomerase-negative replicative senescence in Saccharomyces cerevisiae. Sci Rep 2019; 9:1845. [PMID: 30755624 PMCID: PMC6372760 DOI: 10.1038/s41598-018-38000-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 12/04/2018] [Indexed: 11/21/2022] Open
Abstract
In eukaryotes, telomeres determine cell proliferation potential by triggering replicative senescence in the absence of telomerase. In Saccharomyces cerevisiae, senescence is mainly dictated by the first telomere that reaches a critically short length, activating a DNA-damage-like response. How the corresponding signaling is modulated by the telomeric structure and context is largely unknown. Here we investigated how subtelomeric elements of the shortest telomere in a telomerase-negative cell influence the onset of senescence. We found that a 15 kb truncation of the 7L subtelomere widely used in studies of telomere biology affects cell growth when combined with telomerase inactivation. This effect is likely not explained by (i) elimination of sequence homology at chromosome ends that would compromise homology-directed DNA repair mechanisms; (ii) elimination of the conserved subtelomeric X-element; (iii) elimination of a gene that would become essential in the absence of telomerase; and (iv) heterochromatinization of inner genes, causing the silencing of an essential gene in replicative senescent cells. This works contributes to better delineate subtelomere functions and their impact on telomere biology.
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Affiliation(s)
- Pascale Jolivet
- Sorbonne Université, PSL, CNRS, UMR8226, Institut de Biologie Physico-Chimique, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, F-75005, Paris, France
| | - Kamar Serhal
- Sorbonne Université, PSL, CNRS, UMR8226, Institut de Biologie Physico-Chimique, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, F-75005, Paris, France.,Institut de Génétique Humaine, CNRS, Université Montpellier, Montpellier, France
| | - Marco Graf
- Institute of Molecular Biology (IMB), 55128, Mainz, Germany
| | - Stephan Eberhard
- Sorbonne Université, PSL, CNRS, UMR7141, Institut de Biologie Physico-Chimique, Laboratoire de Physiologie Moléculaire et Membranaire du Chloroplaste, F-75005, Paris, France
| | - Zhou Xu
- Sorbonne Université, PSL, CNRS, UMR8226, Institut de Biologie Physico-Chimique, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, F-75005, Paris, France
| | - Brian Luke
- Institute of Neurobiology and Developmental Biology, JGU Mainz, Ackermannweg 4, 55128, Mainz, Germany.,Institute of Molecular Biology (IMB), 55128, Mainz, Germany
| | - Maria Teresa Teixeira
- Sorbonne Université, PSL, CNRS, UMR8226, Institut de Biologie Physico-Chimique, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, F-75005, Paris, France.
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Fournier LA, Kumar A, Stirling PC. Chromatin as a Platform for Modulating the Replication Stress Response. Genes (Basel) 2018; 9:genes9120622. [PMID: 30544989 PMCID: PMC6316668 DOI: 10.3390/genes9120622] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/03/2018] [Accepted: 12/04/2018] [Indexed: 02/06/2023] Open
Abstract
Eukaryotic DNA replication occurs in the context of chromatin. Recent years have seen major advances in our understanding of histone supply, histone recycling and nascent histone incorporation during replication. Furthermore, much is now known about the roles of histone remodellers and post-translational modifications in replication. It has also become clear that nucleosome dynamics during replication play critical roles in genome maintenance and that chromatin modifiers are important for preventing DNA replication stress. An understanding of how cells deploy specific nucleosome modifiers, chaperones and remodellers directly at sites of replication fork stalling has been building more slowly. Here we will specifically discuss recent advances in understanding how chromatin composition contribute to replication fork stability and restart.
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Affiliation(s)
| | - Arun Kumar
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada.
| | - Peter C Stirling
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada.
- Department of Medical Genetics, University of British Columbia, Vancouver, BC V5Z 1L3, Canada.
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