1
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Saunders N, Monel B, Cayet N, Archetti L, Moreno H, Jeanne A, Marguier A, Buchrieser J, Wai T, Schwartz O, Fréchin M. Dynamic label-free analysis of SARS-CoV-2 infection reveals virus-induced subcellular remodeling. Nat Commun 2024; 15:4996. [PMID: 38862527 PMCID: PMC11166935 DOI: 10.1038/s41467-024-49260-7] [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: 12/09/2023] [Accepted: 05/30/2024] [Indexed: 06/13/2024] Open
Abstract
Assessing the impact of SARS-CoV-2 on organelle dynamics allows a better understanding of the mechanisms of viral replication. We combine label-free holotomographic microscopy with Artificial Intelligence to visualize and quantify the subcellular changes triggered by SARS-CoV-2 infection. We study the dynamics of shape, position and dry mass of nucleoli, nuclei, lipid droplets and mitochondria within hundreds of single cells from early infection to syncytia formation and death. SARS-CoV-2 infection enlarges nucleoli, perturbs lipid droplets, changes mitochondrial shape and dry mass, and separates lipid droplets from mitochondria. We then used Bayesian network modeling on organelle dry mass states to define organelle cross-regulation networks and report modifications of organelle cross-regulation that are triggered by infection and syncytia formation. Our work highlights the subcellular remodeling induced by SARS-CoV-2 infection and provides an Artificial Intelligence-enhanced, label-free methodology to study in real-time the dynamics of cell populations and their content.
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Affiliation(s)
- Nell Saunders
- Virus & Immunity Unit, Institut Pasteur, Université Paris Cité, CNRS, UMR 3569, Paris, France
| | - Blandine Monel
- Virus & Immunity Unit, Institut Pasteur, Université Paris Cité, CNRS, UMR 3569, Paris, France
| | - Nadège Cayet
- Institut Pasteur, Université Paris Cité, Ultrastructural Bioimaging Unit, 75015, Paris, France
| | - Lorenzo Archetti
- Deep Quantitative Biology Department, Nanolive SA, Tolochenaz, Switzerland
| | - Hugo Moreno
- Deep Quantitative Biology Department, Nanolive SA, Tolochenaz, Switzerland
| | - Alexandre Jeanne
- Deep Quantitative Biology Department, Nanolive SA, Tolochenaz, Switzerland
| | - Agathe Marguier
- Deep Quantitative Biology Department, Nanolive SA, Tolochenaz, Switzerland
| | - Julian Buchrieser
- Virus & Immunity Unit, Institut Pasteur, Université Paris Cité, CNRS, UMR 3569, Paris, France
| | - Timothy Wai
- Mitochondrial Biology Group, Institut Pasteur, Université Paris Cité, CNRS, UMR 3691, Paris, France
| | - Olivier Schwartz
- Virus & Immunity Unit, Institut Pasteur, Université Paris Cité, CNRS, UMR 3569, Paris, France.
- Vaccine Research Institute, Creteil, France.
| | - Mathieu Fréchin
- Deep Quantitative Biology Department, Nanolive SA, Tolochenaz, Switzerland.
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2
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de Luna Vitorino FN, Levy MJ, Mansano Wailemann RA, Lopes M, Silva ML, Sardiu ME, Garcia BA, Machado Motta MC, Oliveira CC, Armelin HA, Florens LA, Washburn MP, Pinheiro Chagas da Cunha J. The antiproliferative effect of FGF2 in K-Ras-driven tumor cells involves modulation of rRNA and the nucleolus. J Cell Sci 2023; 136:jcs260989. [PMID: 37921359 PMCID: PMC11166202 DOI: 10.1242/jcs.260989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 10/24/2023] [Indexed: 11/04/2023] Open
Abstract
The nucleolus is sensitive to stress and can orchestrate a chain of cellular events in response to stress signals. Despite being a growth factor, FGF2 has antiproliferative and tumor-suppressive functions in some cellular contexts. In this work, we investigated how the antiproliferative effect of FGF2 modulates chromatin-, nucleolus- and rDNA-associated proteins. The chromatin and nucleolar proteome indicated that FGF2 stimulation modulates proteins related to transcription, rRNA expression and chromatin-remodeling proteins. The global transcriptional rate and nucleolus area increased along with nucleolar disorganization upon 24 h of FGF2 stimulation. FGF2 stimulation induced immature rRNA accumulation by increasing rRNA transcription. The rDNA-associated protein analysis reinforced that FGF2 stimulus interferes with transcription and rRNA processing. RNA Pol I inhibition partially reversed the growth arrest induced by FGF2, indicating that changes in rRNA expression might be crucial for triggering the antiproliferative effect. Taken together, we demonstrate that the antiproliferative FGF2 stimulus triggers significant transcriptional changes and modulates the main cell transcription site, the nucleolus.
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Affiliation(s)
- Francisca N. de Luna Vitorino
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
- Programa de Pós-Graduação Interunidades em Biotecnologia, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil
| | | | - Rosangela A. Mansano Wailemann
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
| | - Mariana Lopes
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
| | - Mariana Loterio Silva
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
| | | | - Benjamin A. Garcia
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, USA
| | - Maria Cristina Machado Motta
- Laboratório de Ultraestrutura Celular Hertha Meyer, Centro de Pesquisa em Medicina de Precisão, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro-UFRJ, Rio de Janeiro, RJ 21491-590, Brazil
- Centro Nacional de Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ 21941-902, Brazil
| | - Carla Columbano Oliveira
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, SP 05508-000, Brazil
| | - Hugo Aguirre Armelin
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
| | | | | | - Julia Pinheiro Chagas da Cunha
- Laboratório de Ciclo Celular – Center of Toxins, Immune-Response and Cell Signalling – CeTICS, Instituto Butantan, São Paulo, SP 055503-900, Brazil
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3
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Li N, Hua B, Chen Q, Teng F, Ruan M, Zhu M, Zhang L, Huo Y, Liu H, Zhuang M, Shen H, Zhu H. A sphingolipid-mTORC1 nutrient-sensing pathway regulates animal development by an intestinal peroxisome relocation-based gut-brain crosstalk. Cell Rep 2022; 40:111140. [PMID: 35905721 DOI: 10.1016/j.celrep.2022.111140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 05/23/2022] [Accepted: 07/01/2022] [Indexed: 11/30/2022] Open
Abstract
The mTOR-dependent nutrient-sensing and response machinery is the central hub for animals to regulate their cellular and developmental programs. However, equivalently pivotal nutrient and metabolite signals upstream of mTOR and developmental-regulatory signals downstream of mTOR are not clear, especially at the organism level. We previously showed glucosylceramide (GlcCer) acts as a critical nutrient and metabolite signal for overall amino acid levels to promote development by activating the intestinal mTORC1 signaling pathway. Here, through a large-scale genetic screen, we find that the intestinal peroxisome is critical for antagonizing the GlcCer-mTORC1-mediated nutrient signal. Mechanistically, GlcCer deficiency, inactive mTORC1, or prolonged starvation relocates intestinal peroxisomes closer to the apical region in a kinesin- and microtubule-dependent manner. Those apical accumulated peroxisomes further release peroxisomal-β-oxidation-derived glycolipid hormones that target chemosensory neurons and downstream nuclear hormone receptor DAF-12 to arrest the animal development. Our data illustrate a sophisticated gut-brain axis that predominantly orchestrates nutrient-sensing-dependent development in animals.
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Affiliation(s)
- Na Li
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 201210, China; University of Chinese Academy of Sciences, Beijing 100000, China
| | - Beilei Hua
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Qing Chen
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fukang Teng
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Meiyu Ruan
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Mengnan Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 201210, China; University of Chinese Academy of Sciences, Beijing 100000, China
| | - Li Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yinbo Huo
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 201210, China; University of Chinese Academy of Sciences, Beijing 100000, China
| | - Hongqin Liu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Min Zhuang
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Huali Shen
- Institutes of Biomedical Sciences, Department of Systems Biology for Medicine and School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Huanhu Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China.
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4
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Korshikov II, Bilonozhko YO, Milchevskaya YG. Peculiarities of Nucleus–Nucleolus Indicators of Seed Progeny in Mother Stankevich Pine trees (Pinus brutia var. stankewiczii Sukacz.) Different in Levels of Heterozygosity. CYTOL GENET+ 2022. [DOI: 10.3103/s0095452722020074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Wu M, Lu L, Chen S, Li Y, Zhang Q, Fu S, Deng X. Natural products inducing nucleolar stress: implications in cancer therapy. Anticancer Drugs 2022; 33:e21-e27. [PMID: 34561998 DOI: 10.1097/cad.0000000000001146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The nucleolus is the site of ribosome biogenesis and is found to play an important role in stress sensing. For over 100 years, the increase in the size and number of nucleoli has been considered as a marker of aggressive tumors. Despite this, the contribution of the nucleolus and the biologic processes mediated by it to cancer pathogenesis has been largely overlooked. This state has been changed over the recent decades with the demonstration that the nucleolus controls numerous cellular functions associated with cancer development. Induction of nucleolar stress has recently been regarded as being superior to conventional cytotoxic/cytostatic strategy in that it is more selective to neoplastic cells while sparing normal cells. Natural products represent an excellent source of bioactive molecules and some of them have been found to be able to induce nucleolar stress. The demonstration of these nucleolar stress-inducing natural products has paved the way for a new therapeutic approach to more delicate tumor cell-killing. This review provides a contemporary summary of the role of the nucleolus as a novel promising target for cancer therapy, with particular emphasis on natural products as an exciting new class of anti-cancer drugs with nucleolar stress-inducing properties.
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Affiliation(s)
- Mi Wu
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Lu Lu
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Sisi Chen
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Ying Li
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Qiuting Zhang
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Shujun Fu
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
| | - Xiyun Deng
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University
- Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha
- Department of Pathophysiology, Jishou University School of Medicine, Jishou, Hunan, China
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6
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Huang DY, Xia XL, Huang R, Li S, Yuan DW, Liu SN. The steroid-induced microRNA let-7 regulates developmental growth by targeting cdc7 in the Drosophila fat body. INSECT SCIENCE 2021; 28:1621-1632. [PMID: 33089948 DOI: 10.1111/1744-7917.12878] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/30/2020] [Accepted: 10/11/2020] [Indexed: 06/11/2023]
Abstract
In insects, 20-hydroxyecdysone (20E) limits systemic growth by triggering developmental transitions. Previous studies have shown that 20E-induced let-7 exhibits crosstalk with the cell cycle. Here, we examined the underlying molecular mechanisms and physiological functions of 20E-induced let-7 in the fat body, an organ for energy storage and nutrient mobilization which plays a critical role in the larval growth. First, the overexpression of let-7 decreased the body size and led to the reduction of both nucleolus and cell sizes in the larval fat body. In contrast, the overexpression of let-7-Sponge increased the nucleolus and cell sizes. Moreover, we found that cdc7, encoding a conserved protein kinase that controls the endocycle, is a target of let-7. Notably, the mutation of cdc7 in the fat body resulted in growth defects. Overall, our findings revealed a novel role of let-7 in the control of endoreduplication-related growth during larval-prepupal transition in Drosophila.
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Affiliation(s)
- Dan-Yan Huang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Xiao-Ling Xia
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Run Huang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Sheng Li
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Dong-Wei Yuan
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Su-Ning Liu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China
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7
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Zhu M, Teng F, Li N, Zhang L, Zhang S, Xu F, Shao J, Sun H, Zhu H. Monomethyl branched-chain fatty acid mediates amino acid sensing upstream of mTORC1. Dev Cell 2021; 56:2692-2702.e5. [PMID: 34610328 DOI: 10.1016/j.devcel.2021.09.010] [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: 02/22/2021] [Revised: 07/24/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
Animals have developed various nutrient-sensing mechanisms for survival under fluctuating environmental conditions. Although extensive cell-culture-based analyses have identified diverse mediators of amino acid sensing upstream of mTOR, studies using animal models to examine intestine-initiated amino acid sensing mechanisms under specific physiological conditions are lacking. Here, we developed a Caenorhabditis elegans model to examine the impact of amino acid deficiency on development. We discovered a leucine-derived monomethyl branched-chain fatty acid and its downstream metabolite, glycosphingolipid, which critically mediates the overall amino acid sensing by intestinal and neuronal mTORC1, which in turn regulates postembryonic development at least partly by controlling protein translation and ribosomal biogenesis. Additional data suggest that a similar mechanism may operate in mammals. This study uncovers an amino-acid-sensing mechanism mediated by a lipid biosynthesis pathway.
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Affiliation(s)
- Mengnan Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China
| | - Fukang Teng
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Na Li
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Li Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Shuxian Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Fan Xu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Jing Shao
- National Humanities Center Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Center for Cardiovascular Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Haipeng Sun
- National Humanities Center Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Center for Cardiovascular Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Huanhu Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
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8
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Pereira-Santana A, Gamboa-Tuz SD, Zhao T, Schranz ME, Vinuesa P, Bayona A, Rodríguez-Zapata LC, Castano E. Fibrillarin evolution through the Tree of Life: Comparative genomics and microsynteny network analyses provide new insights into the evolutionary history of Fibrillarin. PLoS Comput Biol 2020; 16:e1008318. [PMID: 33075080 PMCID: PMC7608942 DOI: 10.1371/journal.pcbi.1008318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 11/03/2020] [Accepted: 09/07/2020] [Indexed: 12/26/2022] Open
Abstract
Fibrillarin (FIB), a methyltransferase essential for life in the vast majority of eukaryotes, is involved in methylation of rRNA required for proper ribosome assembly, as well as methylation of histone H2A of promoter regions of rRNA genes. RNA viral progression that affects both plants and animals requires FIB proteins. Despite the importance and high conservation of fibrillarins, there little is known about the evolutionary dynamics of this small gene family. We applied a phylogenomic microsynteny-network approach to elucidate the evolutionary history of FIB proteins across the Tree of Life. We identified 1063 non-redundant FIB sequences across 1049 completely sequenced genomes from Viruses, Bacteria, Archaea, and Eukarya. FIB is a highly conserved single-copy gene through Archaea and Eukarya lineages, except for plants, which have a gene family expansion due to paleopolyploidy and tandem duplications. We found a high conservation of the FIB genomic context during plant evolution. Surprisingly, FIB in mammals duplicated after the Eutheria split (e.g., ruminants, felines, primates) from therian mammals (e.g., marsupials) to form two main groups of sequences, the FIB and FIB-like groups. The FIB-like group transposed to another genomic context and remained syntenic in all the eutherian mammals. This transposition correlates with differences in the expression patterns of FIB-like proteins and with elevated Ks values potentially due to reduced evolutionary constraints of the duplicated copy. Our results point to a unique evolutionary event in mammals, between FIB and FIB-like genes, that led to non-redundant roles of the vital processes in which this protein is involved.
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Affiliation(s)
- Alejandro Pereira-Santana
- Unidad de Bioquímica y Biología molecular de plantas, Centro de Investigación Científica de Yucatán, Mérida, Yucatán, México
- Unidad de Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Jalisco, México
- Dirección de Cátedras, Consejo Nacional de Ciencia y Tecnología, Ciudad de México, México
| | - Samuel David Gamboa-Tuz
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Mérida, Yucatán, México
| | - Tao Zhao
- Bioinformatics and Evolutionary Genomics, VIB-UGent Center for Plant Systems Biology, Gent, Belgium
- Biosystematics Group, Wageningen University and Research, Wageningen, Netherlands
| | - M. Eric Schranz
- Biosystematics Group, Wageningen University and Research, Wageningen, Netherlands
| | - Pablo Vinuesa
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos, México
| | - Andrea Bayona
- Unidad de Bioquímica y Biología molecular de plantas, Centro de Investigación Científica de Yucatán, Mérida, Yucatán, México
| | | | - Enrique Castano
- Unidad de Bioquímica y Biología molecular de plantas, Centro de Investigación Científica de Yucatán, Mérida, Yucatán, México
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9
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Lima MGF, Rocha LC, Silveira GL, Alvarenga IFS, Andrade-Vieria LF. Nucleolar alterations are reliable parameters to determine the cytogenotoxicity of environmental pollutants. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:630-636. [PMID: 30875556 DOI: 10.1016/j.ecoenv.2019.03.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Pollution generated by deposition of industrial activity waste in the environment without due care can lead to serious environmental consequences. Bioassays in higher plants are means of understanding the cytogenotoxic effects of these substances. In the present work, Allium cepa L. was used as a model species to assess nucleolar changes induced by environmental pollutants. The substances used were Methyl Methane Sulfonate (MMS), cadmium (Cd), Spent Potliner (SPL) and the herbicide Atrazine. Water was used as a negative control. The silver-stained nucleolar organizer region (AgNOR) assay was used making it possible to evaluate how nucleolar parameters (number of nucleoli per nucleus and nucleoli area) behave when facing stress caused by such pollutants. The results obtained showed a variation in the observed parameters: an increase in the number of nucleoli in the treated cells and tendency to a reduction in nucleolar area, indicating that the tested pollutants may have impaired nucleolar activity. In addition, it was possible to establish a relationship between the behavior of the nucleolus with other changes as plantlet growth, cell proliferation, and DNA damage.
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Affiliation(s)
| | - Laiane Corsini Rocha
- Biology Department, Federal University of Lavras (UFLA), ZIP: 37.200-000 Lavras, MG, Brazil
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10
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Nuclear Scaling Is Coordinated among Individual Nuclei in Multinucleated Muscle Fibers. Dev Cell 2019; 49:48-62.e3. [PMID: 30905770 DOI: 10.1016/j.devcel.2019.02.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/28/2018] [Accepted: 02/22/2019] [Indexed: 12/22/2022]
Abstract
Optimal cell performance depends on cell size and the appropriate relative size, i.e., scaling, of the nucleus. How nuclear scaling is regulated and contributes to cell function is poorly understood, especially in skeletal muscle fibers, which are among the largest cells, containing hundreds of nuclei. Here, we present a Drosophila in vivo system to analyze nuclear scaling in whole multinucleated muscle fibers, genetically manipulate individual components, and assess muscle function. Despite precise global coordination, we find that individual nuclei within a myofiber establish different local scaling relationships by adjusting their size and synthetic activity in correlation with positional or spatial cues. While myonuclei exhibit compensatory potential, even minor changes in global nuclear size scaling correlate with reduced muscle function. Our study provides the first comprehensive approach to unraveling the intrinsic regulation of size in multinucleated muscle fibers. These insights to muscle cell biology will accelerate the development of interventions for muscle diseases.
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11
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Lu L, Yi H, Chen C, Yan S, Yao H, He G, Li G, Jiang Y, Deng T, Deng X. Nucleolar stress: is there a reverse version? J Cancer 2018; 9:3723-3727. [PMID: 30405843 PMCID: PMC6216007 DOI: 10.7150/jca.27660] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 08/04/2018] [Indexed: 12/20/2022] Open
Abstract
The nucleolus is a dynamic structure that has roles in various physiological and pathophysiological processes. Perturbations on many aspects of the nucleolar functions are thought to cause “nucleolar stress”, which occurs in response to a variety of chemotherapeutic drugs. The main characteristic changes of nucleolar stress include: 1) reduction of the size and volume of the nucleolus; 2) inhibition of RNA Pol I-mediated rRNA synthesis; and 3) nucleoplasmic translocation of nucleolar stress-related proteins. In studying the apoptosis-inducing effect of the natural compound lovastatin (LV) on breast cancer stem cells, we unexpectedly uncovered a novel form of nucleolar stress, which we call “reverse nucleolar stress”. In our system, the canonical nucleolus stress inducer doxorubicin caused nucleoplasmic translocation of the nucleolar protein NPM and complete abolishment of Nolc1, an NPM-interacting protein and an activator of rRNA transcription. In contrast, the reverse nucleolar stress induced by LV is manifested as a more localized perinucleolar distribution of NPM and an increase in the protein level of Nolc1. Furthermore, translocation of the ribosomal protein RPL3 from the cytoplasm to the nucleolus and increased AgNOR staining were observed. These changes characterize a novel pattern of nucleolar stress doubtlessly distinguishable from the canonical one. The functional consequences of reverse nucleolar stress are not clear at present but may presumably be related to cell death or even normalization of the stressed cell. The discovery of reverse nucleolar stress opens up a new area of research in molecular and cellular biology and might have important implications in cancer therapy.
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Affiliation(s)
- Lu Lu
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Huimei Yi
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Chao Chen
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Shichao Yan
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Hui Yao
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Guangchun He
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
| | - Guifei Li
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China
| | - Yiqun Jiang
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China
| | - Tuo Deng
- Diabetes Research Center and Center for Bioenergetics, Houston Methodist Research Institute, Houston, Texas 77030, USA.,Department of Medicine, Weill Cornell Medical College at Cornell University, New York, New York 10021, USA
| | - Xiyun Deng
- Key Laboratory of Translational Cancer Stem Cell Research, Hunan Normal University, Changsha, Hunan 410013, China.,Departments of Pathology and Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan 410013, China
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12
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Shubina MY, Musinova YR, Sheval EV. Proliferation, cancer, and aging-novel functions of the nucleolar methyltransferase fibrillarin? Cell Biol Int 2018; 42:1463-1466. [PMID: 30080298 DOI: 10.1002/cbin.11044] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 07/29/2018] [Indexed: 01/28/2023]
Abstract
Fibrillarin is an essential nucleolar protein that catalyzes the 2'-O-methylation of ribosomal RNAs. Recently, experimental data have begun to accumulate that suggest that fibrillarin can influence various cellular processes, development of pathological processes, and even aging. The exact mechanism by which fibrillarin can influence these processes has not been found, but some experimental data indicate that up- or downregulation of fibrillarin can modify the ribosome structure and, thus, causе an alteration in relative efficiency with which various mRNAs are translated. Here, we discuss recent studies on the potential roles of fibrillarin in the regulation of cell proliferation, cancer progression, and aging.
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Affiliation(s)
- Maria Y Shubina
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Yana R Musinova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Moscow, Russia.,Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 119334, Moscow, Russia
| | - Eugene V Sheval
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, 119991, Moscow, Russia.,LIA 1066 French-Russian Joint Cancer Research Laboratory, 94805, Villejuif, France
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13
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Anzi S, Stolovich-Rain M, Klochendler A, Fridlich O, Helman A, Paz-Sonnenfeld A, Avni-Magen N, Kaufman E, Ginzberg MB, Snider D, Ray S, Brecht M, Holmes MM, Meir K, Avivi A, Shams I, Berkowitz A, Shapiro AMJ, Glaser B, Ben-Sasson S, Kafri R, Dor Y. Postnatal Exocrine Pancreas Growth by Cellular Hypertrophy Correlates with a Shorter Lifespan in Mammals. Dev Cell 2018; 45:726-737.e3. [PMID: 29920277 DOI: 10.1016/j.devcel.2018.05.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 04/03/2018] [Accepted: 05/21/2018] [Indexed: 02/06/2023]
Abstract
Developmental processes in different mammals are thought to share fundamental cellular mechanisms. We report a dramatic increase in cell size during postnatal pancreas development in rodents, accounting for much of the increase in organ size after birth. Hypertrophy of pancreatic acinar cells involves both higher ploidy and increased biosynthesis per genome copy; is maximal adjacent to islets, suggesting endocrine to exocrine communication; and is partly driven by weaning-related processes. In contrast to the situation in rodents, pancreas cell size in humans remains stable postnatally, indicating organ growth by pure hyperplasia. Pancreatic acinar cell volume varies 9-fold among 24 mammalian species analyzed, and shows a striking inverse correlation with organismal lifespan. We hypothesize that cellular hypertrophy is a strategy for rapid postnatal tissue growth, entailing life-long detrimental effects.
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Affiliation(s)
- Shira Anzi
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Miri Stolovich-Rain
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Agnes Klochendler
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Ori Fridlich
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Aharon Helman
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Avital Paz-Sonnenfeld
- The Tisch Family Zoological Gardens in Jerusalem, Box 898, Manhat, Jerusalem 91008, Israel
| | - Nili Avni-Magen
- The Tisch Family Zoological Gardens in Jerusalem, Box 898, Manhat, Jerusalem 91008, Israel
| | - Elizabeth Kaufman
- The Tisch Family Zoological Gardens in Jerusalem, Box 898, Manhat, Jerusalem 91008, Israel
| | | | - Daniel Snider
- The Hospital for Sick Children, University of Toronto, ON, Canada
| | - Saikat Ray
- Bernstein Center for Computational Neuroscience, Humboldt University of Berlin, Berlin, Germany
| | - Michael Brecht
- Bernstein Center for Computational Neuroscience, Humboldt University of Berlin, Berlin, Germany
| | - Melissa M Holmes
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Karen Meir
- Department of Pathology, Hadassah-Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Aaron Avivi
- Institute of Evolution, University of Haifa, Haifa, Israel
| | - Imad Shams
- Institute of Evolution, University of Haifa, Haifa, Israel
| | - Asaf Berkowitz
- Department of Pathology, Kimron Veterinary Institute, Beit Dagan, Israel
| | | | - Benjamin Glaser
- Endocrinology and Metabolism Service, Department of Internal Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Shmuel Ben-Sasson
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Ran Kafri
- The Hospital for Sick Children, University of Toronto, ON, Canada
| | - Yuval Dor
- Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel.
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14
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Bouffard S, Dambroise E, Brombin A, Lempereur S, Hatin I, Simion M, Corre R, Bourrat F, Joly JS, Jamen F. Fibrillarin is essential for S-phase progression and neuronal differentiation in zebrafish dorsal midbrain and retina. Dev Biol 2018; 437:1-16. [PMID: 29477341 DOI: 10.1016/j.ydbio.2018.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 01/11/2018] [Accepted: 02/13/2018] [Indexed: 10/18/2022]
Abstract
Fibrillarin (Fbl) is a highly conserved protein that plays an essential role in ribosome biogenesis and more particularly in the methylation of ribosomal RNAs and rDNA histones. In cellular models, FBL was shown to play an important role in tumorigenesis and stem cell differentiation. We used the zebrafish as an in vivo model to study Fbl function during embryonic development. We show here that the optic tectum and the eye are severely affected by Fbl depletion whereas ventral regions of the brain are less impacted. The morphogenesis defects are associated with impaired neural differentiation and massive apoptosis. Polysome gradient experiments show that fbl mutant larvae display defects in ribosome biogenesis and activity. Strikingly, flow cytometry analyses revealed different S-phase profiles between wild-type and mutant cells, suggesting a defect in S-phase progression.
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Affiliation(s)
- Stéphanie Bouffard
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Emilie Dambroise
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Alessandro Brombin
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Sylvain Lempereur
- Tefor Core Facility, TEFOR Infrastructure, NeuroPSI, CNRS, Gif-sur-Yvette, France; Université Paris-Est, LIGM, ESIEE, Noisy-le-Grand, France
| | - Isabelle Hatin
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris-Sud, Bâtiment 400, 91400 Orsay, France
| | - Matthieu Simion
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Raphaël Corre
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Franck Bourrat
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France
| | - Jean-Stéphane Joly
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France; Tefor Core Facility, TEFOR Infrastructure, NeuroPSI, CNRS, Gif-sur-Yvette, France
| | - Françoise Jamen
- INRA CASBAH Group, Neurosciences Paris-Saclay Institute, CNRS, Université Paris-Saclay, Université Paris-Sud, Gif-sur-Yvette, France.
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15
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Toro C, Hori RT, Malicdan MCV, Tifft CJ, Goldstein A, Gahl WA, Adams DR, Fauni HB, Wolfe LA, Xiao J, Khan MM, Tian J, Hope KA, Reiter LT, Tremblay MG, Moss T, Franks AL, Balak C, LeDoux MS. A recurrent de novo missense mutation in UBTF causes developmental neuroregression. Hum Mol Genet 2018; 27:691-705. [PMID: 29300972 PMCID: PMC5886272 DOI: 10.1093/hmg/ddx435] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/29/2017] [Accepted: 12/19/2017] [Indexed: 12/17/2022] Open
Abstract
UBTF (upstream binding transcription factor) exists as two isoforms; UBTF1 regulates rRNA transcription by RNA polymerase 1, whereas UBTF2 regulates mRNA transcription by RNA polymerase 2. Herein, we describe 4 patients with very similar patterns of neuroregression due to recurrent de novo mutations in UBTF (GRCh37/hg19, NC_000017.10: g.42290219C > T, NM_014233.3: c.628G > A) resulting in the same amino acid change in both UBTF1 and UBTF2 (p.Glu210Lys [p.E210K]). Disease onset in our cohort was at 2.5 to 3 years and characterized by slow progression of global motor, cognitive and behavioral dysfunction. Notable early features included hypotonia with a floppy gait, high-pitched dysarthria and hyperactivity. Later features included aphasia, dystonia, and spasticity. Speech and ambulatory ability were lost by the early teens. Magnetic resonance imaging showed progressive generalized cerebral atrophy (supratentorial > infratentorial) with involvement of both gray and white matter. Patient fibroblasts showed normal levels of UBTF transcripts, increased expression of pre-rRNA and 18S rRNA, nucleolar abnormalities, markedly increased numbers of DNA breaks, defective cell-cycle progression, and apoptosis. Expression of mutant human UBTF1 in Drosophila neurons was lethal. Although no loss-of-function variants are reported in the Exome Aggregation Consortium (ExAC) database and Ubtf-/- is early embryonic lethal in mice, Ubtf+/- mice displayed only mild motor and behavioral dysfunction in adulthood. Our data underscore the importance of including UBTF E210K in the differential diagnosis of neuroregression and suggest that mainly gain-of-function mechanisms contribute to the pathogenesis of the UBTF E210K neuroregression syndrome.
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Affiliation(s)
- Camilo Toro
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Roderick T Hori
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, USA
| | - May Christine V Malicdan
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Cynthia J Tifft
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Amy Goldstein
- Division of Child Neurology, Department of Pediatrics, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - William A Gahl
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - David R Adams
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Harper B Fauni
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Lynne A Wolfe
- Undiagnosed Diseases Program and Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jianfeng Xiao
- Departments of Neurology and Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Mohammad M Khan
- Departments of Neurology and Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Jun Tian
- Departments of Neurology and Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Kevin A Hope
- Integrated Program in Biological Sciences, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Lawrence T Reiter
- Departments of Neurology and Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Michel G Tremblay
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, QC, Canada
| | - Tom Moss
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, QC, Canada
| | - Alexis L Franks
- Division of Child Neurology, Department of Pediatrics, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Chris Balak
- Center for Rare Childhood Disorders (C4RCD), Translational Genomics Research Institute (TGen), Phoenix, AZ, USA
| | - C4RCD Research Group
- Center for Rare Childhood Disorders (C4RCD), Translational Genomics Research Institute (TGen), Phoenix, AZ, USA
| | - Mark S LeDoux
- Departments of Neurology and Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA
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