1
|
Carré C, Carluer JB, Chaux C, Estoup-Streiff C, Roche N, Hosy E, Mas A, Krouk G. Next-Gen GWAS: full 2D epistatic interaction maps retrieve part of missing heritability and improve phenotypic prediction. Genome Biol 2024; 25:76. [PMID: 38523316 PMCID: PMC10962106 DOI: 10.1186/s13059-024-03202-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 02/19/2024] [Indexed: 03/26/2024] Open
Abstract
The problem of missing heritability requires the consideration of genetic interactions among different loci, called epistasis. Current GWAS statistical models require years to assess the entire combinatorial epistatic space for a single phenotype. We propose Next-Gen GWAS (NGG) that evaluates over 60 billion single nucleotide polymorphism combinatorial first-order interactions within hours. We apply NGG to Arabidopsis thaliana providing two-dimensional epistatic maps at gene resolution. We demonstrate on several phenotypes that a large proportion of the missing heritability can be retrieved, that it indeed lies in epistatic interactions, and that it can be used to improve phenotype prediction.
Collapse
Affiliation(s)
- Clément Carré
- BionomeeX, Montpellier, France.
- IMAG, Univ. Montpellier, CNRS, Montpellier, France.
- IPSiM, Univ. Montpellier, CNRS, INRAE, Montpellier, France.
| | - Jean Baptiste Carluer
- IMAG, Univ. Montpellier, CNRS, Montpellier, France
- IPSiM, Univ. Montpellier, CNRS, INRAE, Montpellier, France
| | | | | | | | - Eric Hosy
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS, Bordeaux, France
| | - André Mas
- BionomeeX, Montpellier, France.
- IMAG, Univ. Montpellier, CNRS, Montpellier, France.
| | - Gabriel Krouk
- BionomeeX, Montpellier, France.
- IPSiM, Univ. Montpellier, CNRS, INRAE, Montpellier, France.
| |
Collapse
|
2
|
Zane F, Bouzid H, Sosa Marmol S, Brazane M, Besse S, Molina JL, Cansell C, Aprahamian F, Durand S, Ayache J, Antoniewski C, Todd N, Carré C, Rera M. Smurfness-based two-phase model of ageing helps deconvolve the ageing transcriptional signature. Aging Cell 2023; 22:e13946. [PMID: 37822253 PMCID: PMC10652310 DOI: 10.1111/acel.13946] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 10/13/2023] Open
Abstract
Ageing is characterised at the molecular level by six transcriptional 'hallmarks of ageing', that are commonly described as progressively affected as time passes. By contrast, the 'Smurf' assay separates high-and-constant-mortality risk individuals from healthy, zero-mortality risk individuals, based on increased intestinal permeability. Performing whole body total RNA sequencing, we found that Smurfness distinguishes transcriptional changes associated with chronological age from those associated with biological age. We show that transcriptional heterogeneity increases with chronological age in non-Smurf individuals preceding the other five hallmarks of ageing that are specifically associated with the Smurf state. Using this approach, we also devise targeted pro-longevity genetic interventions delaying entry in the Smurf state. We anticipate that increased attention to the evolutionary conserved Smurf phenotype will bring about significant advances in our understanding of the mechanisms of ageing.
Collapse
Affiliation(s)
- Flaminia Zane
- Université Paris Cité, INSERM UMR U1284ParisFrance
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | - Hayet Bouzid
- Université Paris Cité, INSERM UMR U1284ParisFrance
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | | | - Mira Brazane
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | | | | | - Céline Cansell
- Université Paris‐Saclay, AgroParisTech, INRAE, UMR PNCAPalaiseauFrance
| | - Fanny Aprahamian
- Metabolomics and Cell Biology Platforms, UMS AMMICaInstitut Gustave RoussyVillejuifFrance
- Centre de Recherche des Cordeliers, Equipe Labellisée par la Ligue Contre le CancerUniversité de Paris, Sorbonne Université, INSERM U1138, Institut Universitaire de FranceParisFrance
| | - Sylvère Durand
- Metabolomics and Cell Biology Platforms, UMS AMMICaInstitut Gustave RoussyVillejuifFrance
- Centre de Recherche des Cordeliers, Equipe Labellisée par la Ligue Contre le CancerUniversité de Paris, Sorbonne Université, INSERM U1138, Institut Universitaire de FranceParisFrance
| | - Jessica Ayache
- Institut Jacques Monod, CNRS UMR 7592, Université Paris CitéParisFrance
| | | | - Nicolas Todd
- Eco‐Anthropologie (EA), Muséum National d'Histoire Naturelle, CNRSUniversité de Paris, Musée de l'HommeParisFrance
| | - Clément Carré
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | - Michael Rera
- Université Paris Cité, INSERM UMR U1284ParisFrance
| |
Collapse
|
3
|
Lee SM, Koo B, Carré C, Fischer A, He C, Kumar A, Liu K, Meyer KD, Ming GL, Peng J, Roignant JY, Storkebaum E, Sun S, De Pietri Tonelli D, Wang Y, Weng YL, Pulvirenti L, Shi Y, Yoon KJ, Song H. Exploring the brain epitranscriptome: perspectives from the NSAS summit. Front Neurosci 2023; 17:1291446. [PMID: 37928731 PMCID: PMC10625424 DOI: 10.3389/fnins.2023.1291446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 10/10/2023] [Indexed: 11/07/2023] Open
Abstract
Increasing evidence reinforces the essential function of RNA modifications in development and diseases, especially in the nervous system. RNA modifications impact various processes in the brain, including neurodevelopment, neurogenesis, neuroplasticity, learning and memory, neural regeneration, neurodegeneration, and brain tumorigenesis, leading to the emergence of a new field termed neuroepitranscriptomics. Deficiency in machineries modulating RNA modifications has been implicated in a range of brain disorders from microcephaly, intellectual disability, seizures, and psychiatric disorders to brain cancers such as glioblastoma. The inaugural NSAS Challenge Workshop on Brain Epitranscriptomics hosted in Crans-Montana, Switzerland in 2023 assembled a group of experts from the field, to discuss the current state of the field and provide novel translational perspectives. A summary of the discussions at the workshop is presented here to simulate broader engagement from the general neuroscience field.
Collapse
Affiliation(s)
- Sung-Min Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Stem Cell Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Bonsang Koo
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Stem Cell Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Clément Carré
- Transgenerational Epigenetics & Small RNA Biology, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Sorbonne Université, Paris, France
| | - André Fischer
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Chuan He
- Department of Chemistry, Howard Hughes Medical Institute, The University of Chicago, Chicago, IL, United States
- Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, The University of Chicago, Chicago, IL, United States
| | - Ajeet Kumar
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Stem Cell Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Kathy Liu
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA, United States
| | - Kate D. Meyer
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
- Department of Neurobiology, Duke University School of Medicine, Durham, NC, United States
| | - Guo-li Ming
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Junmin Peng
- Department of Structural Biology, St. Jude Children's Research Hospital, Danny Thomas Place, Memphis, TN, United States
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Danny Thomas Place, Memphis, TN, United States
| | - Jean-Yves Roignant
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-University Mainz, Mainz, Staudingerweg, Germany
| | - Erik Storkebaum
- Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, Netherlands
| | - Shuying Sun
- Department of Physiology and Brain Science Institute, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | | | - Yinsheng Wang
- Department of Chemistry, University of California, Riverside, CA, United States
| | - Yi-Lan Weng
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston, TX, United States
| | | | - Yanhong Shi
- Department of Neurodegenerative Diseases, Beckman Research Institute of City of Hope, Duarte, CA, United States
| | - Ki-Jun Yoon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Stem Cell Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Hongjun Song
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- The Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| |
Collapse
|
4
|
Asif-Laidin A, Casier K, Ziriat Z, Boivin A, Viodé E, Delmarre V, Ronsseray S, Carré C, Teysset L. Modeling early germline immunization after horizontal transfer of transposable elements reveals internal piRNA cluster heterogeneity. BMC Biol 2023; 21:117. [PMID: 37226160 DOI: 10.1186/s12915-023-01616-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 05/05/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND A fraction of all genomes is composed of transposable elements (TEs) whose mobility needs to be carefully controlled. In gonads, TE activity is repressed by PIWI-interacting RNAs (piRNAs), a class of small RNAs synthesized by heterochromatic loci enriched in TE fragments, called piRNA clusters. Maintenance of active piRNA clusters across generations is secured by maternal piRNA inheritance providing the memory for TE repression. On rare occasions, genomes encounter horizontal transfer (HT) of new TEs with no piRNA targeting them, threatening the host genome integrity. Naïve genomes can eventually start to produce new piRNAs against these genomic invaders, but the timing of their emergence remains elusive. RESULTS Using a set of TE-derived transgenes inserted in different germline piRNA clusters and functional assays, we have modeled a TE HT in Drosophila melanogaster. We have found that the complete co-option of these transgenes by a germline piRNA cluster can occur within four generations associated with the production of new piRNAs all along the transgenes and the germline silencing of piRNA sensors. Synthesis of new transgenic TE piRNAs is linked to piRNA cluster transcription dependent on Moonshiner and heterochromatin mark deposition that propagates more efficiently on short sequences. Moreover, we found that sequences located within piRNA clusters can have different piRNA profiles and can influence transcript accumulation of nearby sequences. CONCLUSIONS Our study reveals that genetic and epigenetic properties, such as transcription, piRNA profiles, heterochromatin, and conversion efficiency along piRNA clusters, could be heterogeneous depending on the sequences that compose them. These findings suggest that the capacity of transcriptional signal erasure induced by the chromatin complex specific of the piRNA cluster can be incomplete through the piRNA cluster loci. Finally, these results have revealed an unexpected level of complexity that highlights a new magnitude of piRNA cluster plasticity fundamental for the maintenance of genome integrity.
Collapse
Affiliation(s)
- Amna Asif-Laidin
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Karine Casier
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
- Present Address: CNRS, Institut de Biologie Physico-Chimique, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, UMR8226, Telomere Biology, Paris, F-75005, France
| | - Zoheir Ziriat
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Antoine Boivin
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Elise Viodé
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Valérie Delmarre
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Stéphane Ronsseray
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Clément Carré
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France
| | - Laure Teysset
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, "Transgenerational Epigenetics & Small RNA Biology", Paris, F-75005, France.
| |
Collapse
|
5
|
Casier K, Autaa J, Gueguen N, Delmarre V, Marie PP, Ronsseray S, Carré C, Brasset E, Teysset L, Boivin A. The histone demethylase Kdm3 prevents auto-immune piRNAs production in Drosophila. Sci Adv 2023; 9:eade3872. [PMID: 37027460 PMCID: PMC10081847 DOI: 10.1126/sciadv.ade3872] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 03/08/2023] [Indexed: 06/19/2023]
Abstract
Genome integrity of the animal germline is protected from transposable element activity by PIWI-interacting RNAs (piRNAs). While piRNA biogenesis is intensively explored, little is known about the genetical determination of piRNA clusters, the genomic sources of piRNAs. Using a bimodal epigenetic state piRNA cluster (BX2), we identified the histone demethylase Kdm3 as being able to prevent a cryptic piRNA production. In the absence of Kdm3, dozens of coding gene-containing regions become genuine germline dual-strand piRNA clusters. Eggs laid by Kdm3 mutant females show developmental defects phenocopying loss of function of genes embedded into the additional piRNA clusters, suggesting an inheritance of functional ovarian "auto-immune" piRNAs. Antagonizing piRNA cluster determination through chromatin modifications appears crucial to prevent auto-immune genic piRNAs production.
Collapse
Affiliation(s)
- Karine Casier
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Julie Autaa
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Nathalie Gueguen
- iGReD, CNRS, INSERM, Faculté de Médecine, Université Clermont Auvergne, 63000 Clermont-Ferrand, France
| | - Valérie Delmarre
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Pauline P. Marie
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Stéphane Ronsseray
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Clément Carré
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Emilie Brasset
- iGReD, CNRS, INSERM, Faculté de Médecine, Université Clermont Auvergne, 63000 Clermont-Ferrand, France
| | - Laure Teysset
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| | - Antoine Boivin
- Transgenerational Epigenetics and Small RNA Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Biologie du Développement, UMR7622, F-75005 Paris, France
| |
Collapse
|
6
|
Brazane M, Dimitrova DG, Pigeon J, Paolantoni C, Ye T, Marchand V, Da Silva B, Schaefer E, Angelova MT, Stark Z, Delatycki M, Dudding-Byth T, Gecz J, Plaçais PY, Teysset L, Préat T, Piton A, Hassan BA, Roignant JY, Motorin Y, Carré C. The ribose methylation enzyme FTSJ1 has a conserved role in neuron morphology and learning performance. Life Sci Alliance 2023; 6:e202201877. [PMID: 36720500 PMCID: PMC9889914 DOI: 10.26508/lsa.202201877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/08/2023] [Accepted: 01/10/2023] [Indexed: 02/02/2023] Open
Abstract
FTSJ1 is a conserved human 2'-O-methyltransferase (Nm-MTase) that modifies several tRNAs at position 32 and the wobble position 34 in the anticodon loop. Its loss of function has been linked to X-linked intellectual disability (XLID), and more recently to cancers. However, the molecular mechanisms underlying these pathologies are currently unclear. Here, we report a novel FTSJ1 pathogenic variant from an X-linked intellectual disability patient. Using blood cells derived from this patient and other affected individuals carrying FTSJ1 mutations, we performed an unbiased and comprehensive RiboMethSeq analysis to map the ribose methylation on all human tRNAs and identify novel targets. In addition, we performed a transcriptome analysis in these cells and found that several genes previously associated with intellectual disability and cancers were deregulated. We also found changes in the miRNA population that suggest potential cross-regulation of some miRNAs with these key mRNA targets. Finally, we show that differentiation of FTSJ1-depleted human neural progenitor cells into neurons displays long and thin spine neurites compared with control cells. These defects are also observed in Drosophila and are associated with long-term memory deficits. Altogether, our study adds insight into FTSJ1 pathologies in humans and flies by the identification of novel FTSJ1 targets and the defect in neuron morphology.
Collapse
Affiliation(s)
- Mira Brazane
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Dilyana G Dimitrova
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Julien Pigeon
- Paris Brain Institute-Institut du Cerveau (ICM), Sorbonne Université, Inserm, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
| | - Chiara Paolantoni
- Center for Integrative Genomics, Génopode Building, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Tao Ye
- Institute of Genetics and Molecular and Cellular Biology, Strasbourg University, CNRS UMR7104, INSERM U1258, Illkirch, France
| | - Virginie Marchand
- Université de Lorraine, CNRS, INSERM, EpiRNASeq Core Facility, UMS2008/US40 IBSLor,Nancy, France
| | - Bruno Da Silva
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Elise Schaefer
- Service de Génétique Médicale, Hôpitaux Universitaires de Strasbourg, Institut de Génétique Médicale d'Alsace, Strasbourg, France
| | - Margarita T Angelova
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Zornitza Stark
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia; Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | - Martin Delatycki
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia; Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | | | - Jozef Gecz
- Adelaide Medical School and Robinson Research Institute, The University of Adelaide; South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Pierre-Yves Plaçais
- Energy & Memory, Brain Plasticity Unit, CNRS, ESPCI Paris, PSL Research University, Paris, France
| | - Laure Teysset
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Thomas Préat
- Energy & Memory, Brain Plasticity Unit, CNRS, ESPCI Paris, PSL Research University, Paris, France
| | - Amélie Piton
- Institute of Genetics and Molecular and Cellular Biology, Strasbourg University, CNRS UMR7104, INSERM U1258, Illkirch, France
| | - Bassem A Hassan
- Paris Brain Institute-Institut du Cerveau (ICM), Sorbonne Université, Inserm, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
| | - Jean-Yves Roignant
- Center for Integrative Genomics, Génopode Building, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Yuri Motorin
- Université de Lorraine, CNRS, UMR7365 IMoPA, Nancy, France
| | - Clément Carré
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| |
Collapse
|
7
|
Pomiès L, Brouard C, Duruflé H, Maigné É, Carré C, Gody L, Trösser F, Katsirelos G, Mangin B, Langlade NB, de Givry S. Gene regulatory network inference methodology for genomic and transcriptomic data acquired in genetically related heterozygote individuals. Bioinformatics 2022; 38:4127-4134. [PMID: 35792837 DOI: 10.1093/bioinformatics/btac445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 06/17/2022] [Accepted: 07/05/2022] [Indexed: 12/24/2022] Open
Abstract
MOTIVATION Inferring gene regulatory networks in non-independent genetically related panels is a methodological challenge. This hampers evolutionary and biological studies using heterozygote individuals such as in wild sunflower populations or cultivated hybrids. RESULTS First, we simulated 100 datasets of gene expressions and polymorphisms, displaying the same gene expression distributions, heterozygosities and heritabilities as in our dataset including 173 genes and 353 genotypes measured in sunflower hybrids. Secondly, we performed a meta-analysis based on six inference methods [least absolute shrinkage and selection operator (Lasso), Random Forests, Bayesian Networks, Markov Random Fields, Ordinary Least Square and fast inference of networks from directed regulation (Findr)] and selected the minimal density networks for better accuracy with 64 edges connecting 79 genes and 0.35 area under precision and recall (AUPR) score on average. We identified that triangles and mutual edges are prone to errors in the inferred networks. Applied on classical datasets without heterozygotes, our strategy produced a 0.65 AUPR score for one dataset of the DREAM5 Systems Genetics Challenge. Finally, we applied our method to an experimental dataset from sunflower hybrids. We successfully inferred a network composed of 105 genes connected by 106 putative regulations with a major connected component. AVAILABILITY AND IMPLEMENTATION Our inference methodology dedicated to genomic and transcriptomic data is available at https://forgemia.inra.fr/sunrise/inference_methods. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
Collapse
Affiliation(s)
- Lise Pomiès
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| | - Céline Brouard
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| | - Harold Duruflé
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan 31326, France
| | - Élise Maigné
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| | - Clément Carré
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| | - Louise Gody
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan 31326, France
| | - Fulya Trösser
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| | - George Katsirelos
- MIA-Paris, AgroParisTech, Université Paris-Saclay, INRAE, Paris 75231, France
| | - Brigitte Mangin
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan 31326, France
| | - Nicolas B Langlade
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan 31326, France
| | - Simon de Givry
- MIAT, Université Fédérale de Toulouse, INRAE, Castanet-Tolosan 31326, France
| |
Collapse
|
8
|
Pinzon Cortes JA, El-Osta A, Fontemaggi G, Delihas N, Miyazaki K, Goel A, Brazane M, Carré C, Dama P, Bayraktar S, Castellano L, Enguita FJ, Mitic T, Caporali A, Gerber AP, Amodio N. The Non-Coding RNA Journal Club: Highlights on Recent Papers-10. Noncoding RNA 2022; 8:3. [PMID: 35076559 PMCID: PMC8788465 DOI: 10.3390/ncrna8010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 12/05/2022] Open
Abstract
We are delighted to share with you our seventh Journal Club and highlight some of the most interesting papers published recently [...].
Collapse
Affiliation(s)
- Jairo A. Pinzon Cortes
- Epigenetics in Human Health and Disease, Department of Diabetes, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia;
| | - Assam El-Osta
- Epigenetics in Human Health and Disease, Department of Diabetes, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia;
| | - Giulia Fontemaggi
- Oncogenomic and Epigenetic Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Nicholas Delihas
- Department of Microbiology and Immunology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA
| | - Katsuki Miyazaki
- Department of Molecular Diagnostics and Experimental Therapeutics, Beckman Research Institute of City of Hope, Biomedical Research Center, Monrovia, CA 91016, USA;
- Department of Surgery, Tokushima University, Tokushima 7708503, Japan
| | - Ajay Goel
- Department of Molecular Diagnostics and Experimental Therapeutics, Beckman Research Institute of City of Hope, Biomedical Research Center, Monrovia, CA 91016, USA;
- City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Mira Brazane
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France
| | - Clément Carré
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France
| | - Paola Dama
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, UK
| | - Salih Bayraktar
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, UK
| | - Leandro Castellano
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, UK
- Department of Surgery and Cancer, Imperial Centre for Translational and Experimental Medicine (ICTEM), Imperial College London, London W12 0NN, UK
| | - Francisco J. Enguita
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, 1649-028 Lisbon, Portugal
| | - Tijana Mitic
- University/British Heart Foundation Centre for Cardiovascular Science, The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK;
| | - Andrea Caporali
- University/British Heart Foundation Centre for Cardiovascular Science, The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK;
| | - André P. Gerber
- Department of Microbial Sciences, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Nicola Amodio
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy
| |
Collapse
|
9
|
Molla-Herman A, Angelova MT, Ginestet M, Carré C, Antoniewski C, Huynh JR. tRNA Fragments Populations Analysis in Mutants Affecting tRNAs Processing and tRNA Methylation. Front Genet 2020; 11:518949. [PMID: 33193603 PMCID: PMC7586317 DOI: 10.3389/fgene.2020.518949] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 09/03/2020] [Indexed: 01/16/2023] Open
Abstract
tRNA fragments (tRFs) are a class of small non-coding RNAs (sncRNAs) derived from tRNAs. tRFs are highly abundant in many cell types including stem cells and cancer cells, and are found in all domains of life. Beyond translation control, tRFs have several functions ranging from transposon silencing to cell proliferation control. However, the analysis of tRFs presents specific challenges and their biogenesis is not well understood. They are very heterogeneous and highly modified by numerous post-transcriptional modifications. Here we describe a bioinformatic pipeline (tRFs-Galaxy) to study tRFs populations and shed light onto tRNA fragments biogenesis in Drosophila melanogaster. Indeed, we used small RNAs Illumina sequencing datasets extracted from wild type and mutant ovaries affecting two different highly conserved steps of tRNA biogenesis: 5'pre-tRNA processing (RNase-P subunit Rpp30) and tRNA 2'-O-methylation (dTrm7_34 and dTrm7_32). Using our pipeline, we show how defects in tRNA biogenesis affect nuclear and mitochondrial tRFs populations and other small non-coding RNAs biogenesis, such as small nucleolar RNAs (snoRNAs). This tRF analysis workflow will advance the current understanding of tRFs biogenesis, which is crucial to better comprehend tRFs roles and their implication in human pathology.
Collapse
Affiliation(s)
- Anahi Molla-Herman
- Collège de France, CIRB, CNRS Inserm UMR 7241, PSL Research University, Paris, France
| | - Margarita T. Angelova
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, CNRS, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Maud Ginestet
- Collège de France, CIRB, CNRS Inserm UMR 7241, PSL Research University, Paris, France
| | - Clément Carré
- Transgenerational Epigenetics & Small RNA Biology, Sorbonne Université, CNRS, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, Paris, France
| | - Christophe Antoniewski
- ARTbio Bioinformatics Analysis Facility, Sorbonne Université, CNRS, Institut de Biologie Paris Seine, Paris, France
| | - Jean-René Huynh
- Collège de France, CIRB, CNRS Inserm UMR 7241, PSL Research University, Paris, France
| |
Collapse
|
10
|
Angelova MT, Dimitrova DG, Da Silva B, Marchand V, Jacquier C, Achour C, Brazane M, Goyenvalle C, Bourguignon-Igel V, Shehzada S, Khouider S, Lence T, Guerineau V, Roignant JY, Antoniewski C, Teysset L, Bregeon D, Motorin Y, Schaefer MR, Carré C. tRNA 2'-O-methylation by a duo of TRM7/FTSJ1 proteins modulates small RNA silencing in Drosophila. Nucleic Acids Res 2020; 48:2050-2072. [PMID: 31943105 PMCID: PMC7038984 DOI: 10.1093/nar/gkaa002] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 12/30/2019] [Accepted: 01/01/2020] [Indexed: 12/14/2022] Open
Abstract
2′-O-Methylation (Nm) represents one of the most common RNA modifications. Nm affects RNA structure and function with crucial roles in various RNA-mediated processes ranging from RNA silencing, translation, self versus non-self recognition to viral defense mechanisms. Here, we identify two Nm methyltransferases (Nm-MTases) in Drosophila melanogaster (CG7009 and CG5220) as functional orthologs of yeast TRM7 and human FTSJ1. Genetic knockout studies together with MALDI-TOF mass spectrometry and RiboMethSeq mapping revealed that CG7009 is responsible for methylating the wobble position in tRNAPhe, tRNATrp and tRNALeu, while CG5220 methylates position C32 in the same tRNAs and also targets additional tRNAs. CG7009 or CG5220 mutant animals were viable and fertile but exhibited various phenotypes such as lifespan reduction, small RNA pathways dysfunction and increased sensitivity to RNA virus infections. Our results provide the first detailed characterization of two TRM7 family members in Drosophila and uncover a molecular link between enzymes catalyzing Nm at specific tRNAs and small RNA-induced gene silencing pathways.
Collapse
Affiliation(s)
- Margarita T Angelova
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Dilyana G Dimitrova
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Bruno Da Silva
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Virginie Marchand
- Next-Generation Sequencing Core Facility, UMS2008 IBSLor CNRS-Université de Lorraine-INSERM, BioPôle, 9 avenue de la Forêt de Haye, 54505 Vandoeuvre-les-Nancy, France
| | - Caroline Jacquier
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Cyrinne Achour
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Mira Brazane
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Catherine Goyenvalle
- Eucaryiotic Translation, Sorbonne Université, CNRS, Institut de Biologie Paris Seine, Biological Adaptation and Ageing, Institut de Biologie Paris Seine, 9 Quai Saint bernard, 75005 Paris, France
| | - Valérie Bourguignon-Igel
- Next-Generation Sequencing Core Facility, UMS2008 IBSLor CNRS-Université de Lorraine-INSERM, BioPôle, 9 avenue de la Forêt de Haye, 54505 Vandoeuvre-les-Nancy, France.,Ingénierie Moléculaire et Physiopathologie Articulaire, UMR7365, CNRS - Université de Lorraine, 9 avenue de la Forêt de Haye, 54505 Vandoeuvre-les-Nancy, France
| | - Salman Shehzada
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Souraya Khouider
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Tina Lence
- Institute of Molecular Biology, Ackermannweg 4, 55128, Mainz, Germany
| | - Vincent Guerineau
- Institut de Chimie de Substances Naturelles, Centre de Recherche de Gif CNRS, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Jean-Yves Roignant
- Institute of Molecular Biology, Ackermannweg 4, 55128, Mainz, Germany.,Center for Integrative Genomics, Génopode Building, Faculty of Biology and Medicine, University of Lausanne, CH-1015, Lausanne, Switzerland
| | - Christophe Antoniewski
- ARTbio Bioinformatics Analysis Facility, Sorbonne Université, CNRS, Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Laure Teysset
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| | - Damien Bregeon
- Eucaryiotic Translation, Sorbonne Université, CNRS, Institut de Biologie Paris Seine, Biological Adaptation and Ageing, Institut de Biologie Paris Seine, 9 Quai Saint bernard, 75005 Paris, France
| | - Yuri Motorin
- Ingénierie Moléculaire et Physiopathologie Articulaire, UMR7365, CNRS - Université de Lorraine, 9 avenue de la Forêt de Haye, 54505 Vandoeuvre-les-Nancy, France
| | - Matthias R Schaefer
- Division of Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna, Schwarzspanierstrasse 17, A-1090 Vienna, Austria
| | - Clément Carré
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement - Institut de Biologie Paris Seine, 9 Quai Saint Bernard, 75005 Paris, France
| |
Collapse
|
11
|
Bernard C, Escalas A, Villeriot N, Agogué H, Hugoni M, Duval C, Carré C, Got P, Sarazin G, Jézéquel D, Leboulanger C, Grossi V, Ader M, Troussellier M. Very Low Phytoplankton Diversity in a Tropical Saline-Alkaline Lake, with Co-dominance of Arthrospira fusiformis (Cyanobacteria) and Picocystis salinarum (Chlorophyta). Microb Ecol 2019; 78:603-617. [PMID: 30729265 PMCID: PMC6744573 DOI: 10.1007/s00248-019-01332-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 01/16/2019] [Indexed: 05/03/2023]
Abstract
Lake Dziani Dzaha (Mayotte Island, Indian Ocean) is a tropical thalassohaline lake which geochemical and biological conditions make it a unique aquatic ecosystem considered as a modern analogue of Precambrian environments. In the present study, we focused on the diversity of phytoplanktonic communities, which produce very high and stable biomass (mean2014-2015 = 652 ± 179 μg chlorophyll a L-1). As predicted by classical community ecology paradigms, and as observed in similar environments, a single species is expected to dominate the phytoplanktonic communities. To test this hypothesis, we sampled water column in the deepest part of the lake (18 m) during rainy and dry seasons for two consecutive years. Phytoplanktonic communities were characterized using a combination of metagenomic, microscopy-based and flow cytometry approaches, and we used statistical modeling to identify the environmental factors determining the abundance of dominant organisms. As hypothesized, the overall diversity of the phytoplanktonic communities was very low (15 OTUs), but we observed a co-dominance of two, and not only one, OTUs, viz., Arthrospira fusiformis (Cyanobacteria) and Picocystis salinarum (Chlorophyta). We observed a decrease in the abundance of these co-dominant taxa along the depth profile and identified the adverse environmental factors driving this decline. The functional traits measured on isolated strains of these two taxa (i.e., size, pigment composition, and concentration) are then compared and discussed to explain their capacity to cope with the extreme environmental conditions encountered in the aphotic, anoxic, and sulfidic layers of the water column of Lake Dziani Dzaha.
Collapse
Affiliation(s)
- C Bernard
- UMR 7245 MCAM, Muséum National d'Histoire Naturelle - CNRS, 57 Rue Cuvier, CP 39, 75231, Paris Cedex 05, France.
| | - A Escalas
- UMR 7245 MCAM, Muséum National d'Histoire Naturelle - CNRS, 57 Rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - N Villeriot
- UMR 7245 MCAM, Muséum National d'Histoire Naturelle - CNRS, 57 Rue Cuvier, CP 39, 75231, Paris Cedex 05, France
- UMR 9190 MARBEC, CNRS - Université de Montpellier - IRD - IFREMER, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - H Agogué
- UMR 7266 LIENSs, Université de La Rochelle - CNRS, 2 rue Olympe de Gouges, 17000, La Rochelle, France
| | - M Hugoni
- UMR 5557 Ecologie Microbienne, Université Lyon 1 - CNRS - INRA, 69220, Villeurbanne Cedex, France
| | - C Duval
- UMR 7245 MCAM, Muséum National d'Histoire Naturelle - CNRS, 57 Rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - C Carré
- UMR 9190 MARBEC, CNRS - Université de Montpellier - IRD - IFREMER, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - P Got
- UMR 9190 MARBEC, CNRS - Université de Montpellier - IRD - IFREMER, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - G Sarazin
- UMR 7154 Institut de Physique du Globe de Paris - Sorbonne Paris Cité, Université Paris Diderot, 1 rue de Jussieu, 75005, Paris, France
| | - D Jézéquel
- UMR 7154 Institut de Physique du Globe de Paris - Sorbonne Paris Cité, Université Paris Diderot, 1 rue de Jussieu, 75005, Paris, France
| | - C Leboulanger
- UMR 9190 MARBEC, CNRS - Université de Montpellier - IRD - IFREMER, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - V Grossi
- Laboratoire de Géologie de Lyon, Université de Lyon - CNRS - UCBL - ENSL, 69220 Villeurbanne, France
| | - M Ader
- UMR 7154 Institut de Physique du Globe de Paris - Sorbonne Paris Cité, Université Paris Diderot, 1 rue de Jussieu, 75005, Paris, France
| | - M Troussellier
- UMR 9190 MARBEC, CNRS - Université de Montpellier - IRD - IFREMER, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| |
Collapse
|
12
|
Casier K, Boivin A, Carré C, Teysset L. Environmentally-Induced Transgenerational Epigenetic Inheritance: Implication of PIWI Interacting RNAs. Cells 2019; 8:cells8091108. [PMID: 31546882 PMCID: PMC6770481 DOI: 10.3390/cells8091108] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/16/2019] [Accepted: 09/17/2019] [Indexed: 12/11/2022] Open
Abstract
Environmentally-induced transgenerational epigenetic inheritance is an emerging field. The understanding of associated epigenetic mechanisms is currently in progress with open questions still remaining. In this review, we present an overview of the knowledge of environmentally-induced transgenerational inheritance and associated epigenetic mechanisms, mainly in animals. The second part focuses on the role of PIWI-interacting RNAs (piRNAs), a class of small RNAs involved in the maintenance of the germline genome, in epigenetic memory to put into perspective cases of environmentally-induced transgenerational inheritance involving piRNA production. Finally, the last part addresses how genomes are facing production of new piRNAs, and from a broader perspective, how this process might have consequences on evolution and on sporadic disease development.
Collapse
Affiliation(s)
- Karine Casier
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France.
| | - Antoine Boivin
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France.
| | - Clément Carré
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France.
| | - Laure Teysset
- Transgenerational Epigenetics & small RNA Biology, Sorbonne Université, CNRS, Laboratoire Biologie du Développement, Institut de Biologie Paris-Seine, UMR7622, 75005 Paris, France.
| |
Collapse
|
13
|
Genenncher B, Durdevic Z, Hanna K, Zinkl D, Mobin MB, Senturk N, Da Silva B, Legrand C, Carré C, Lyko F, Schaefer M. Mutations in Cytosine-5 tRNA Methyltransferases Impact Mobile Element Expression and Genome Stability at Specific DNA Repeats. Cell Rep 2019; 22:1861-1874. [PMID: 29444437 DOI: 10.1016/j.celrep.2018.01.061] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 12/18/2017] [Accepted: 01/19/2018] [Indexed: 12/22/2022] Open
Abstract
The maintenance of eukaryotic genome stability is ensured by the interplay of transcriptional as well as post-transcriptional mechanisms that control recombination of repeat regions and the expression and mobility of transposable elements. We report here that mutations in two (cytosine-5) RNA methyltransferases, Dnmt2 and NSun2, impact the accumulation of mobile element-derived sequences and DNA repeat integrity in Drosophila. Loss of Dnmt2 function caused moderate effects under standard conditions, while heat shock exacerbated these effects. In contrast, NSun2 function affected mobile element expression and genome integrity in a heat shock-independent fashion. Reduced tRNA stability in both RCMT mutants indicated that tRNA-dependent processes affected mobile element expression and DNA repeat stability. Importantly, further experiments indicated that complex formation with RNA could also contribute to the impact of RCMT function on gene expression control. These results thus uncover a link between tRNA modification enzymes, the expression of repeat DNA, and genomic integrity.
Collapse
Affiliation(s)
- Bianca Genenncher
- Division of Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University Vienna, Schwarzspanierstrasse 17, 1090 Vienna, Austria
| | - Zeljko Durdevic
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany; Developmental Biology Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Katharina Hanna
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| | - Daniela Zinkl
- Division of Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University Vienna, Schwarzspanierstrasse 17, 1090 Vienna, Austria
| | - Mehrpouya Balaghy Mobin
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany; Howard Hughes Medical Institute, Laboratory of RNA Molecular Biology, Rockefeller University, 1230 York Avenue, New York, NY 10065, USA
| | - Nevcin Senturk
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany; Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany
| | - Bruno Da Silva
- Drosophila Genetics and Epigenetics Lab, Sorbonne Universités, Université Pierre et Marie Curie (UPMC), CNRS, Institut de Biologie Paris Seine (IBPS), 9, Quai St Bernard, Boîte courrier 24, 75252 Paris Cedex 05, France
| | - Carine Legrand
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| | - Clément Carré
- Drosophila Genetics and Epigenetics Lab, Sorbonne Universités, Université Pierre et Marie Curie (UPMC), CNRS, Institut de Biologie Paris Seine (IBPS), 9, Quai St Bernard, Boîte courrier 24, 75252 Paris Cedex 05, France
| | - Frank Lyko
- Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| | - Matthias Schaefer
- Division of Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University Vienna, Schwarzspanierstrasse 17, 1090 Vienna, Austria.
| |
Collapse
|
14
|
Broc G, Gonzalès B, Chakiba J, Carré C, Valantin S, Mori PY. Pertinence clinique en population dépressive d’un médiateur thérapeutique axé sur les ressources personnelles : évaluation par protocole individuel de type arrêt—reprise sur une patiente hospitalisée pour dépression. PRAT PSYCHOL 2019. [DOI: 10.1016/j.prps.2018.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
15
|
Abstract
Nm (2'-O-methylation) is one of the most common modifications in the RNA world. It has the potential to influence the RNA molecules in multiple ways, such as structure, stability, and interactions, and to play a role in various cellular processes from epigenetic gene regulation, through translation to self versus non-self recognition. Yet, building scientific knowledge on the Nm matter has been hampered for a long time by the challenges in detecting and mapping this modification. Today, with the latest advancements in the area, more and more Nm sites are discovered on RNAs (tRNA, rRNA, mRNA, and small non-coding RNA) and linked to normal or pathological conditions. This review aims to synthesize the Nm-associated human diseases known to date and to tackle potential indirect links to some other biological defects.
Collapse
Affiliation(s)
- Dilyana G Dimitrova
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
| | - Laure Teysset
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
| | - Clément Carré
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
| |
Collapse
|
16
|
van den Beek M, da Silva B, Pouch J, Ali Chaouche MEA, Carré C, Antoniewski C. Dual-layer transposon repression in heads of Drosophila melanogaster. RNA 2018; 24:1749-1760. [PMID: 30217866 PMCID: PMC6239173 DOI: 10.1261/rna.067173.118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 09/05/2018] [Indexed: 05/11/2023]
Abstract
piRNA-mediated repression of transposable elements (TE) in the germline limits the accumulation of mutations caused by their transposition. It is not clear whether the piRNA pathway plays a role in adult, nongonadal tissues in Drosophila melanogaster. To address this question, we analyzed the small RNA content of adult Drosophila melanogaster heads. We found that the varying amount of piRNA-sized, ping-pong positive molecules in heads correlates with contamination by gonadal tissue during RNA extraction, suggesting that most of the piRNAs detected in heads originate from gonads. We next sequenced the heads of wild-type and piwi mutants to address whether piwi loss of function would affect the low amount of piRNA-sized, ping-pong negative molecules that are still detected in heads hand-checked to avoid gonadal contamination. We find that loss of piwi does not significantly affect these 24-28 nt RNAs. Instead, we observe increased siRNA levels against the majority of Drosophila TE families. To determine the effect of this siRNA level change on transposon expression, we sequenced the transcriptome of wild-type, piwi, dicer-2 and piwi, dicer-2 double-mutant heads. We find that RNA expression levels of the majority of TE in piwi or dicer-2 mutants remain unchanged and that TE transcripts increase only in piwi, dicer-2 double-mutants. These results lead us to suggest a dual-layer model for TE repression in adult somatic tissues. Piwi-mediated gene silencing established during embryogenesis constitutes the first layer of TE repression whereas Dicer-2-dependent siRNA-mediated silencing provides a backup mechanism to repress TEs that escape silencing by Piwi.
Collapse
Affiliation(s)
- Marius van den Beek
- Drosophila Genetics and Epigenetics; Sorbonne Université, CNRS, Biologie du développement - Institut de Biologie Paris Seine, 75005 Paris, France
| | - Bruno da Silva
- Drosophila Genetics and Epigenetics; Sorbonne Université, CNRS, Biologie du développement - Institut de Biologie Paris Seine, 75005 Paris, France
| | - Juliette Pouch
- Genomic facility, Institut de biologie de l'Ecole normale supérieure (IBENS), Ecole normale supérieure, CNRS, INSERM, PSL Université Paris, 75005 Paris, France
| | - Mohammed El Amine Ali Chaouche
- Genomic facility, Institut de biologie de l'Ecole normale supérieure (IBENS), Ecole normale supérieure, CNRS, INSERM, PSL Université Paris, 75005 Paris, France
| | - Clément Carré
- Drosophila Genetics and Epigenetics; Sorbonne Université, CNRS, Biologie du développement - Institut de Biologie Paris Seine, 75005 Paris, France
| | - Christophe Antoniewski
- Drosophila Genetics and Epigenetics; Sorbonne Université, CNRS, Biologie du développement - Institut de Biologie Paris Seine, 75005 Paris, France
- ARTbio Bioinformatics Analysis Facility, Sorbonne Université, CNRS, Institut de Biologie Paris Seine, 75005 Paris, France
| |
Collapse
|
17
|
Meybeck M, Lestel L, Carré C, Bouleau G, Garnier J, Mouchel JM. Trajectories of river chemical quality issues over the Longue Durée: the Seine River (1900S-2010). Environ Sci Pollut Res Int 2018; 25:23468-23484. [PMID: 27392629 DOI: 10.1007/s11356-016-7124-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 06/20/2016] [Indexed: 05/08/2023]
Abstract
River quality trajectories are presented for (i) organic pollution, (ii) eutrophication, (iii) nitrate pollution, and (iv) metal contamination over the Longue Durée (130 to 70 years). They are defined by a quantified state indicator (S) specific to each issue, compared to drivers (D) or pressures (P) and to social responses (R) that reflect the complex interactions between society and river quality. The Lower Seine River, naturally sensitive to anthropogenic pressures, greatly impacted by Paris urban growth, industrialization, and intensive agriculture, and well documented by the PIREN-Seine 25-year research program, was chosen to illustrate these trajectories. State indicators, dissolved oxygen, algal pigments, nitrate, and heavy metals (Cd, Cr, Hg, Pb, Zn) in sediments have only been monitored by river basin authorities since 1971. Therefore, their past changes have been reconstructed using three approaches: (i) reassessment of historical sources, (ii) pressure-state models that reconstruct past water quality, and (iii) sedimentary archives of past persistent contamination from dated floodplain cores. The indicators were then transformed into river quality status using contemporary water quality criteria throughout these records. Each environmental issue shows specific trajectories because each has its own relationship between the issue evidence and the social response, but all are characterized by very poor quality in the past, largely ignored: the long-term summer hypoxia (<1880-1995), the summer eutrophication peak (1965-2005), the growing nitrate level since the 1950s, recently stabilized but still high, and the extreme metal contamination (>1935-2000) that peaked in the 1960s. The efficiency of social responses has been highly variable but more efficient in the last 15-25 years.
Collapse
Affiliation(s)
- M Meybeck
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 place Jussieu, 75005, Paris, France
| | - L Lestel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 place Jussieu, 75005, Paris, France.
| | - C Carré
- Université Paris1 Panthéon-Sorbonne, Laboratoire LADYSS-Laboratoire Dynamique Sociales et Recomposition des Espaces (UMR 7533), 2 rue Valette, 75005, Paris, France
| | - G Bouleau
- IRSTEA Bordeaux, Unité environnement, territoires, infrastructures, 50 Avenue de Verdun, 33612, Cestas, France
| | - J Garnier
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 place Jussieu, 75005, Paris, France
| | - J M Mouchel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 place Jussieu, 75005, Paris, France
| |
Collapse
|
18
|
Angelova MT, Dimitrova DG, Dinges N, Lence T, Worpenberg L, Carré C, Roignant JY. The Emerging Field of Epitranscriptomics in Neurodevelopmental and Neuronal Disorders. Front Bioeng Biotechnol 2018; 6:46. [PMID: 29707539 PMCID: PMC5908907 DOI: 10.3389/fbioe.2018.00046] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 03/29/2018] [Indexed: 01/19/2023] Open
Abstract
Analogous to DNA methylation and histone modifications, RNA modifications represent a novel layer of regulation of gene expression. The dynamic nature and increasing number of RNA modifications offer new possibilities to rapidly alter gene expression upon specific environmental changes. Recent lines of evidence indicate that modified RNA molecules and associated complexes regulating and “reading” RNA modifications play key roles in the nervous system of several organisms, controlling both, its development and function. Mutations in several human genes that modify transfer RNA (tRNA) have been linked to neurological disorders, in particular to intellectual disability. Loss of RNA modifications alters the stability of tRNA, resulting in reduced translation efficiency and generation of tRNA fragments, which can interfere with neuronal functions. Modifications present on messenger RNAs (mRNAs) also play important roles during brain development. They contribute to neuronal growth and regeneration as well as to the local regulation of synaptic functions. Hence, potential combinatorial effects of RNA modifications on different classes of RNA may represent a novel code to dynamically fine tune gene expression during brain function. Here we discuss the recent findings demonstrating the impact of modified RNAs on neuronal processes and disorders.
Collapse
Affiliation(s)
- Margarita T Angelova
- Drosophila Genetics and Epigenetics, Sorbonne Université, Centre National de la Recherche Scientifique, Biologie du Développement-Institut de Biologie Paris Seine, Paris, France
| | - Dilyana G Dimitrova
- Drosophila Genetics and Epigenetics, Sorbonne Université, Centre National de la Recherche Scientifique, Biologie du Développement-Institut de Biologie Paris Seine, Paris, France
| | - Nadja Dinges
- Laboratory of RNA Epigenetics, Institute of Molecular Biology, Mainz, Germany
| | - Tina Lence
- Laboratory of RNA Epigenetics, Institute of Molecular Biology, Mainz, Germany
| | - Lina Worpenberg
- Laboratory of RNA Epigenetics, Institute of Molecular Biology, Mainz, Germany
| | - Clément Carré
- Drosophila Genetics and Epigenetics, Sorbonne Université, Centre National de la Recherche Scientifique, Biologie du Développement-Institut de Biologie Paris Seine, Paris, France
| | - Jean-Yves Roignant
- Laboratory of RNA Epigenetics, Institute of Molecular Biology, Mainz, Germany
| |
Collapse
|
19
|
Ristova D, Carré C, Pervent M, Medici A, Kim GJ, Scalia D, Ruffel S, Birnbaum KD, Lacombe B, Busch W, Coruzzi GM, Krouk G. Combinatorial interaction network of transcriptomic and phenotypic responses to nitrogen and hormones in the Arabidopsis thaliana root. Sci Signal 2016; 9:rs13. [PMID: 27811143 DOI: 10.1126/scisignal.aaf2768] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Plants form the basis of the food webs that sustain animal life. Exogenous factors, such as nutrients and sunlight, and endogenous factors, such as hormones, cooperate to control both the growth and the development of plants. We assessed how Arabidopsis thaliana integrated nutrient and hormone signaling pathways to control root growth and development by investigating the effects of combinatorial treatment with the nutrients nitrate and ammonium; the hormones auxin, cytokinin, and abscisic acid; and all binary combinations of these factors. We monitored and integrated short-term genome-wide changes in gene expression over hours and long-term effects on root development and architecture over several days. Our analysis revealed trends in nutrient and hormonal signal crosstalk and feedback, including responses that exhibited logic gate behavior, which means that they were triggered only when specific combinations of signals were present. From the data, we developed a multivariate network model comprising the signaling molecules, the early gene expression modulation, and the subsequent changes in root phenotypes. This multivariate network model pinpoints several genes that play key roles in the control of root development and may help understand how eukaryotes manage multifactorial signaling inputs.
Collapse
Affiliation(s)
- Daniela Ristova
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, USA.,Gregor Mendel Institute, Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, A-1030 Vienna, Austria
| | - Clément Carré
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France.,Institut Montpelliérain Alexander Grothendieck, Place Eugene Bataillon, 34090 Montpellier, France
| | - Marjorie Pervent
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France
| | - Anna Medici
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France
| | - Grace Jaeyoon Kim
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, USA
| | - Domenica Scalia
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, USA
| | - Sandrine Ruffel
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France
| | - Kenneth D Birnbaum
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, USA
| | - Benoît Lacombe
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France
| | - Wolfgang Busch
- Gregor Mendel Institute, Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, A-1030 Vienna, Austria
| | - Gloria M Coruzzi
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, USA
| | - Gabriel Krouk
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, UMR CNRS/INRA/SupAgro/UM, Institut de Biologie Intégrative des Plantes "Claude Grignon," Place Viala, 34060 Montpellier Cedex, France.
| |
Collapse
|
20
|
Bouvy M, Got P, Domaizon I, Pagano M, Leboulanger C, Bouvier C, Carré C, Roques C, Dupuy C. Plankton communities in the five Iles Eparses (Western Indian Ocean) considered to be pristine ecosystems. Acta Oecologica 2016. [DOI: 10.1016/j.actao.2015.10.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
21
|
Krouk G, Carré C, Fizames C, Gojon A, Ruffel S, Lacombe B. GeneCloud Reveals Semantic Enrichment in Lists of Gene Descriptions. Mol Plant 2015; 8:971-973. [PMID: 25707756 DOI: 10.1016/j.molp.2015.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 01/30/2015] [Accepted: 02/09/2015] [Indexed: 06/04/2023]
Affiliation(s)
- Gabriel Krouk
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France.
| | - Clément Carré
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France; Institut de Modélisation Mathématique de Montpellier, CNRS UMR 5149, Université de Montpellier, Place Eugene Bataillon, 34095 Montpellier Cedex 5, France
| | - Cecile Fizames
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France
| | - Alain Gojon
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France
| | - Sandrine Ruffel
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France
| | - Benoit Lacombe
- Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes 'Claude Grignon', UMR CNRS/INRA/ SupAgro/UM, Place Pierre Viala, 34060 Montpellier Cedex, France.
| |
Collapse
|
22
|
Carré C, Bonnet L, Avérous L. Solvent- and catalyst-free synthesis of fully biobased nonisocyanate polyurethanes with different macromolecular architectures. RSC Adv 2015. [DOI: 10.1039/c5ra17638g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A bis(cyclic carbonate) based on a dimeric fatty acid was successfully synthesized.
Collapse
Affiliation(s)
- C. Carré
- BioTeam/ICPEES-ECPM
- UMR CNRS 7515
- Université de Strasbourg
- 67087 Strasbourg Cedex 2, France
| | - L. Bonnet
- BioTeam/ICPEES-ECPM
- UMR CNRS 7515
- Université de Strasbourg
- 67087 Strasbourg Cedex 2, France
| | - L. Avérous
- BioTeam/ICPEES-ECPM
- UMR CNRS 7515
- Université de Strasbourg
- 67087 Strasbourg Cedex 2, France
| |
Collapse
|
23
|
Assenza F, Elsen JM, Legarra A, Carré C, Sallé G, Robert-Granié C, Moreno CR. Genetic parameters for growth and faecal worm egg count following Haemonchus contortus experimental infestations using pedigree and molecular information. Genet Sel Evol 2014; 46:13. [PMID: 24528625 PMCID: PMC3939629 DOI: 10.1186/1297-9686-46-13] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 12/10/2013] [Indexed: 11/10/2022] Open
Abstract
Background Haemonchosis is a parasitic disease that causes severe economic losses in sheep industry. In recent years, the increasing resistance of the parasite to anthelmintics has raised the need for alternative control strategies. Genetic selection is a promising alternative but its efficacy depends on the availability of genetic variation and on the occurrence of favourable genetic correlations between the traits included in the breeding goal. The objective of this study was twofold. First, to estimate both the heritability of and the genetic correlations between growth traits and parasite resistance traits, using bivariate linear mixed animal models, from the phenotypes and genotypes of 1004 backcross lambs (considered as a single population), which underwent two subsequent experimental infestations protocols with Haemonchus contortus. Second, to compare the precision of the estimates when using two different relationship matrices: including pedigree information only or including also SNP (single nucleotide polymorphism) information. Results Heritabilities were low for average daily gain before infestation (0.10 to 0.15) and average daily gain during the first infestation (0.11 to 0.16), moderate for faecal egg counts during the first infestation (0.21 to 0.38) and faecal egg counts during the second infestation (0.48 to 0.55). Genetic correlations between both growth traits and faecal egg count during the naïve infestation were equal to zero but the genetic correlation between faecal egg count during the second infestation and growth was positive in a Haemonchus contortus free environment and negative in a contaminated environment. The standard errors of the estimates obtained by including SNP information were smaller than those obtained by including pedigree information only. Conclusions The genetic parameters estimates suggest that growth performance can be selected for independently of selection on resistance to naïve infestation. Selection for increased growth in a non-contaminated environment could lead to more susceptible animals with long-term exposure to the infestation but it could be possible to select for increased growth in a contaminated environment while also increasing resistance to the long-term exposure to the parasite. The use of molecular information increases the precision of the estimates.
Collapse
Affiliation(s)
- Fabrizio Assenza
- INRA, UR0631 Station d'Amélioration Génétique des Animaux, F-31326 Castanet-Tolosan, France.
| | | | | | | | | | | | | |
Collapse
|
24
|
Carré C, Jacquier C, Bougé AL, de Chaumont F, Besnard-Guerin C, Thomassin H, Pidoux J, Da Silva B, Chalatsi E, Zahra S, Olivo-Marin JC, Munier-Lehmann H, Antoniewski C. AutomiG, a biosensor to detect alterations in miRNA biogenesis and in small RNA silencing guided by perfect target complementarity. PLoS One 2013; 8:e74296. [PMID: 24019960 PMCID: PMC3760873 DOI: 10.1371/journal.pone.0074296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 07/30/2013] [Indexed: 12/19/2022] Open
Abstract
Defects in miRNA biogenesis or activity are associated to development abnormalities and diseases. In Drosophila, miRNAs are predominantly loaded in Argonaute-1, which they guide for silencing of target RNAs. The miRNA pathway overlaps the RNAi pathway in this organism, as miRNAs may also associate with Argonaute-2, the mediator of RNAi. We set up a gene construct in which a single inducible promoter directs the expression of the GFP protein as well as two miRNAs perfectly matching the GFP sequences. We show that self-silencing of the resulting automiG gene requires Drosha, Pasha, Dicer-1, Dicer-2 and Argonaute-2 loaded with the anti-GFP miRNAs. In contrast, self-silencing of the automiG gene does not involve Argonaute-1. Thus, automiG reports in vivo for both miRNA biogenesis and Ago-2 mediated silencing, providing a powerful biosensor to identify situations where miRNA or siRNA pathways are impaired. As a proof of concept, we used automiG as a biosensor to screen a chemical library and identified 29 molecules that strongly inhibit miRNA silencing, out of which 5 also inhibit RNAi triggered by long double-stranded RNA. Finally, the automiG sensor is also self-silenced by the anti-GFP miRNAs in HeLa cells and might be easily used to identify factors involved in miRNA biogenesis and silencing guided by perfect target complementarity in mammals.
Collapse
Affiliation(s)
- Clément Carré
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
| | - Caroline Jacquier
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
- Chromatin and Cell Biology, Institute of Human Genetics, Montpellier, France
| | - Anne-Laure Bougé
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
- mRNA Regulation and Development, Institute of Human Genetics, Montpellier, France
| | | | - Corinne Besnard-Guerin
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
- Inserm U1016 - CNRS UMR 8104, Faculté de Médecine-Cochin, Paris, France
| | - Hélène Thomassin
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
| | - Josette Pidoux
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
| | - Bruno Da Silva
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
| | - Eleftheria Chalatsi
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
| | - Sarah Zahra
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
| | | | - Hélène Munier-Lehmann
- Institut Pasteur, Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Paris, France
- CNRS, UMR3523, Paris, France
| | - Christophe Antoniewski
- Drosophila Genetics and Epigenetics, Laboratory of Developmental Biology, CNRS UMR7622, Université Pierre et Marie Curie, Paris, France
- Institut Pasteur, Drosophila Genetics and Epigenetics, Paris, France
- * E-mail:
| |
Collapse
|
25
|
Abstract
Female-specific repression of male-specific-lethal-2 (msl2) mRNA in Drosophila melanogaster provides a paradigm for coordinated control of gene expression by RNA-binding complexes. Repression is orchestrated by Sex-lethal (SXL), which binds to the 5' and 3' untranslated regions (UTRs) of the mRNA and inhibits splicing in the nucleus and subsequent translation in the cytoplasm. Here we show that SXL ensures msl2 silencing by yet a third mechanism that involves inhibition of nucleocytoplasmic transport of msl2 mRNA. To identify SXL cofactors in msl2 regulation, we devised a two-step purification method termed GRAB (GST pull-down and RNA affinity binding) and identified Held-Out-Wings (HOW) as a component of the msl2 5' UTR-associated complex. HOW directly interacts with SXL and binds to two sequence elements in the msl2 5' UTR. Depletion of HOW reduces the capacity of SXL to repress the expression of msl2 reporters without affecting SXL-mediated regulation of splicing or translation. Instead, HOW is required for SXL to retain msl2 transcripts in the nucleus. Cooperation with SXL confers a sex-specific role to HOW. Our results uncover a novel function of SXL in nuclear mRNA retention and identify HOW as a mediator of this function.
Collapse
Affiliation(s)
- Antoine Graindorge
- Gene Regulation, Stem Cells, and Cancer Programme, Centre for Genomic Regulation (CRG), 08003 Barcelona, Spain
| | | | | |
Collapse
|
26
|
Carré C, Gamboa F, Cros D, Hickey JM, Gorjanc G, Manfredi E. Genetic prediction of complex traits: integrating infinitesimal and marked genetic effects. Genetica 2013; 141:239-46. [PMID: 23715777 PMCID: PMC3695327 DOI: 10.1007/s10709-013-9722-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 05/20/2013] [Indexed: 11/24/2022]
Abstract
Genetic prediction for complex traits is usually based on models including individual (infinitesimal) or marker effects. Here, we concentrate on models including both the individual and the marker effects. In particular, we develop a "Mendelian segregation" model combining infinitesimal effects for base individuals and realized Mendelian sampling in descendants described by the available DNA data. The model is illustrated with an example and the analyses of a public simulated data file. Further, the potential contribution of such models is assessed by simulation. Accuracy, measured as the correlation between true (simulated) and predicted genetic values, was similar for all models compared under different genetic backgrounds. As expected, the segregation model is worthwhile when markers capture a low fraction of total genetic variance.
Collapse
Affiliation(s)
- Clément Carré
- UR 631 SAGA, INRA Toulouse, B.P. 52627, Auzeville, 31326 Castanet-Tolosan Cedex, France
| | | | | | | | | | | |
Collapse
|
27
|
Piaton E, Advenier AS, Carré C, Decaussin-Petrucci M, Mege-Lechevallier F, Ruffion A. p16INK4a/Ki-67 dual labelling as a marker for the presence of high-grade cancer cells or disease progression in urinary cytopathology. Cytopathology 2012; 24:327-34. [DOI: 10.1111/j.1365-2303.2012.01008.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
28
|
Ibrahim A, Ley C, Allonas X, Tarzi OI, Chan Yong A, Carré C, Chevallier R. Optimization of a photopolymerizable material based on a photocyclic initiating system using holographic recording. Photochem Photobiol Sci 2012; 11:1682-90. [DOI: 10.1039/c2pp25099c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
29
|
Chevalier E, Lagente V, Dupont M, Fargeau H, Palazzi X, Richard V, Dassaud M, Fric M, Coupe M, Carré C, Leduc S, Bernardelli P, Vergne F, Berna P, Bertrand CP. Lack of involvement of type 7 phosphodiesterase in an experimental model of asthma. Eur Respir J 2011; 39:582-8. [PMID: 22088971 DOI: 10.1183/09031936.00102610] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Type 7 phosphodiesterases (PDE7) are responsible for the decrease of intracellular cyclic AMP (cAMP) in many cells involved in allergic asthma by suppressing their potential to respond to many activating stimuli. The elevation of intracellular cAMP has been associated with immunosuppressive and anti-inflammatory activities and represents a potential treatment of asthma. Our aim was to evaluate the impact of the deletion of the murine phosphodiesterase (PDE)7B gene and then to evaluate the efficacy of a newly described selective PDE7A and -B inhibitor on an ovalbumin (OVA)-induced airway inflammation and airway hyperreactivity (AHR) model in mice. Inflammation was determined 72 h after single OVA challenge or 24 h after multiple challenges by the relative cell influx and cytokine content in bronchoalveolar lavage fluid. AHR and immunoglobulin E levels in serum were determined after multiple challenges. For the first time, we have demonstrated that the deletion of the PDE7B gene or the pharmacological inhibition of PDE7A and -B had no effect on all the parameters looked at in this model. These results highlight the absence of any implication of the PDE7 enzyme in our model.
Collapse
Affiliation(s)
- E Chevalier
- Pfizer Global Research and Development, Biology Laboratories, Fresnes, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Leboulanger C, Bouvy M, Carré C, Cecchi P, Amalric L, Bouchez A, Pagano M, Sarazin G. Comparison of the effects of two herbicides and an insecticide on tropical freshwater plankton in microcosms. Arch Environ Contam Toxicol 2011; 61:599-613. [PMID: 21340574 DOI: 10.1007/s00244-011-9653-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Accepted: 02/07/2011] [Indexed: 05/05/2023]
Abstract
Natural plankton communities from a tropical freshwater reservoir (Combani Reservoir, Mayotte Island, Mozambique Channel) were exposed, in 20-l nutrient-enriched microcosms, to two nominal concentrations of three pesticides: the herbicides diuron (2.2 and 11 μg/l) and paraquat (10 and 40.5 μg/l) and the insecticide fenitrothion (10 and 100 μg/l), commonly used in the tropics for agriculture and disease vector control. Bacterioplankton, phytoplankton, and zooplankton communities were monitored for 5 days after exposure, and the concentrations of toxicant and major nutrients were measured. Bacterioplankton growth was noticeable in all systems and was slightly affected by pesticide at any concentration. A transitory increase in thymidine-based bacterial production was observed in diuron- and fenitrothion-treated microcosms, followed by a marked decrease in all microcosms after 5 days. The functional diversity of bacterioplankton, evaluated using BIOLOG ECO(®) microplates, was reduced by exposure to the highest pesticide concentrations. Phytoplankton was affected by pesticides in different ways. Chlorophyll biomass and biovolumes were increased by diuron addition and decreased by paraquat, whereas fenitrothion-treated microcosms remained unaffected relative to controls. Phytoplankton taxonomic diversity was decreased by paraquat and high doses of fenitrothion but was unaffected by addition of diuron. The decrease in diversity was due to a reduction in the number of species, whereas the density of small cells increased, especially after addition of paraquat. Heterotrophic flagellates were sensitive to paraquat and to the highest diuron concentration; a reduction in biomass of up to 90% was observed for 40.5 μg/l paraquat. Zooplankton, dominated by Thermocyclops decipiens and Diaphanosoma excisum, was slightly sensitive to diuron, and very sensitive to paraquat. High concentrations of the insecticide fenitrothion were effective only on young stages. The potential direct and indirect effects of pesticide contamination on such a simplified plankton food web, typical of newly constructed reservoirs, appear to differ significantly depending on the biological compartment considered. The overall sensitivity of tropical plankton is comparable to the sensitivity for temperate systems, and direct and indirect effects appeared rapidly, within 5 days of exposure.
Collapse
Affiliation(s)
- C Leboulanger
- IRD UMR, ECOSYM UMR CNRS-IRD-Université Montpellier II, France.
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Abstract
In this article, we characterize histone demethylase activity of the entire family of JmjC+N proteins of Drosophila melanogaster. Our results show that Lid (little imaginal discs), which is structurally homologous to JARID1, demethylates H3K4me3. However, contrary to what would be inferred from its demethylase activity, lid contributes to the establishment of transcriptionally competent chromatin states as: (i) is required for histone H3 acetylation; (ii) contributes to expression of the homoeotic gene Ultrabithorax (Ubx); and (iii) antagonizes heterochromatin-mediated gene silencing (PEV). These results, which are consistent with the identification of lid as a trithorax group (trxG) gene, are discussed in the context of current models for the contribution of H3K4me3 to the regulation of gene expression. Here, we also show that the two Drosophila JMJD2 homologues, dJMJD2(1)/CG15835 and dJMJD2(2)/CG33182, are capable of demethylating both H3K9me3 and H3K36me3. dJMJD2(1)/CG15835 regulates heterochromatin organization, as its over-expression induces spreading of HP1, out of heterochromatin, into euchromatin, without affecting the actual pattern of histone modifications of heterochromatin. dJMJD2(1)/CG15835 is excluded from heterochromatin and localizes to multiple euchromatic sites, where it regulates H3K36 methylation. These results indicate that dJMJD2(1)/CG15835 contributes to delimit hetero- and euchromatic territories through the regulation of H3K36 methylation in euchromatin. On the other hand, dJARID2/CG3654 shows no demethylase activity on H3K4me3, H3K9me3, H3K27me3, H3K36me3 and H4K20me3.
Collapse
Affiliation(s)
- Marta Lloret-Llinares
- Institute of Molecular Biology of Barcelona, CSIC, Institute for Research in Biomedicine (IRB Barcelona), Parc Científic de Barcelona, Josep Samitier, 1-5, 08028 Barcelona, Spain
| | | | | | | | | |
Collapse
|
32
|
Carré C, Ciurciu A, Komonyi O, Jacquier C, Fagegaltier D, Pidoux J, Tricoire H, Tora L, Boros IM, Antoniewski C. The Drosophila NURF remodelling and the ATAC histone acetylase complexes functionally interact and are required for global chromosome organization. EMBO Rep 2007; 9:187-92. [PMID: 18084186 DOI: 10.1038/sj.embor.7401141] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Revised: 11/13/2007] [Accepted: 11/16/2007] [Indexed: 11/09/2022] Open
Abstract
Drosophila Gcn5 is the catalytic subunit of the SAGA and ATAC histone acetylase complexes. Here, we show that mutations in Gcn5 and the ATAC component Ada2a induce a decondensation of the male X chromosome, similar to that induced by mutations in the Iswi and Nurf301 subunits of the NURF nucleosome remodelling complex. Genetic studies as well as transcript profiling analysis indicate that ATAC and NURF regulate overlapping sets of target genes during development. In addition, we find that Ada2a chromosome binding and histone H4-Lys12 acetylation are compromised in Iswi and Nurf301 mutants. Our results strongly suggest that NURF is required for ATAC to access the chromatin and to regulate global chromosome organization.
Collapse
Affiliation(s)
- Clément Carré
- Department of Developmental Biology/CNRS URA 2578, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Feuillade M, Croutxé-Barghorn C, Carré C. Photopatternable hybrid sol–gel films: A liquid 29Si NMR investigation of the inorganic network formation. PROG SOLID STATE CH 2006. [DOI: 10.1016/j.progsolidstchem.2005.11.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
34
|
Schubiger M, Carré C, Antoniewski C, Truman JW. Ligand-dependent de-repression via EcR/USP acts as a gate to coordinate the differentiation of sensory neurons in the Drosophila wing. Development 2005; 132:5239-48. [PMID: 16267093 DOI: 10.1242/dev.02093] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Loss of function of either the ecdysone receptor (EcR) or Ultraspiracle (USP), the two components of the ecdysone receptor, causes precocious differentiation of the sensory neurons on the wing of Drosophila. We propose that the unliganded receptor complex is repressive and that this repression is relieved as the hormone titers increase at the onset of metamorphosis. The point in development where the receptor complex exerts this repression varies for different groups of sensilla. For the chemosensory organ precursors along the wing margin, the block is at the level of senseless expression and is indirect, via the repressive control of broad expression. Misexpressing broad or senseless can circumvent the repression by the unliganded receptor and leads to precocious differentiation of the sensory neurons. This precocious differentiation results in the misguidance of their axons. The sensory precursors of some of the campaniform sensilla on the third longitudinal vein are born prior to the rise in ecdysone. Their differentiation is also repressed by the unliganded EcR/USP complex but the block occurs after senseless expression but before the precursors undertake their first division. We suggest that in imaginal discs the unliganded EcR/USP complex acts as a ligand-sensitive ;gate' that can be imposed at various points in a developmental pathway, depending on the nature of the cells involved. In this way, the ecdysone signal can function as a developmental timer coordinating development within the imaginal disc.
Collapse
Affiliation(s)
- Margrit Schubiger
- Department of Biology, Box 35 1800, University of Washington, Seattle, WA 98195, USA.
| | | | | | | |
Collapse
|
35
|
Colombani J, Bianchini L, Layalle S, Pondeville E, Dauphin-Villemant C, Antoniewski C, Carré C, Noselli S, Léopold P. Antagonistic actions of ecdysone and insulins determine final size in Drosophila. Science 2005; 310:667-70. [PMID: 16179433 DOI: 10.1126/science.1119432] [Citation(s) in RCA: 484] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
All animals coordinate growth and maturation to reach their final size and shape. In insects, insulin family molecules control growth and metabolism, whereas pulses of the steroid 20-hydroxyecdysone (20E) initiate major developmental transitions. We show that 20E signaling also negatively controls animal growth rates by impeding general insulin signaling involving localization of the transcription factor dFOXO and transcription of the translation inhibitor 4E-BP. We also demonstrate that the larval fat body, equivalent to the vertebrate liver, is a key relay element for ecdysone-dependent growth inhibition. Hence, ecdysone counteracts the growth-promoting action of insulins, thus forming a humoral regulatory loop that determines organismal size.
Collapse
Affiliation(s)
- Julien Colombani
- CNRS/University of Nice-Sophia Antipolis, UMR6543, Parc Valrose, 06108 Nice Cedex 2, France
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Abstract
Although it has been well established that histone acetyltransferases (HATs) are involved in the modulation of chromatin structure and gene transcription, there is only little information on their developmental role in higher organisms. Gcn5 was the first transcription factor with HAT activity identified in eukaryotes. Here we report the isolation and characterization of Drosophila melanogaster dGcn5 mutants. Null dGcn5 alleles block the onset of both oogenesis and metamorphosis, while hypomorphic dGcn5 alleles impair the formation of adult appendages and cuticle. Strikingly, the dramatic loss of acetylation of the K9 and K14 lysine residues of histone H3 in dGcn5 mutants has no noticeable effect on larval tissues. In contrast, strong cell proliferation defects in imaginal tissues are observed. In vivo complementation experiments revealed that dGcn5 integrates specific functions in addition to chromosome binding and acetylation. Surprisingly, a dGcn5 variant protein with a deletion of the bromodomain, which has been shown to recognize acetylated histones, appears to be fully functional. Our results establish dGcn5 as a major histone H3 acetylase in Drosophila which plays a key role in the control of specific morphogenetic cascades during developmental transitions.
Collapse
Affiliation(s)
- Clément Carré
- Laboratory of Drosophila Genetics and Epigenetics, Department of Developmental Biology, CNRS URA 2578, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | | | | | | |
Collapse
|
37
|
Dréno B, Nocera T, Verrière F, Vienne MP, Ségard C, Vitse S, Carré C. Topical Retinaldehyde with Glycolic Acid: Study of Tolerance and Acceptability in Association with Anti-Acne Treatments in 1,709 Patients. Dermatology 2005; 210 Suppl 1:22-9. [PMID: 15724104 DOI: 10.1159/000081500] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Retinaldehyde (RAL), a key metabolite between vitamin A and retinoic acid, acts by modulating differentiation and proliferation of keratinocytes, which is of interest in acne lesions, mainly retentional lesions. Glycolic acid increases the exfoliation of corneocytes explaining its mild activity on retentional lesions. Thus, RAL and glycolic acid combined in the same product (Diacneal) have complementary activities which can be of interest for acne patients. The aim of this study was to evaluate the tolerance of Diacneal used by 1,709 acne patients in combination with their usual acne products except retinoids. RESULTS This study demonstrated a very good tolerance of Diacneal when used with other acne treatments for 90 days. Complaints about side-effects were rare. Moreover, the significant decrease in both inflammatory and retentional lesions between day 0 and day 90 indicates that Diacneal could amplify the efficiency of other anti-acne products used at the same time by the patients. The subjective evaluation of the preparation's efficacy by investigators and patients was strongly favourable. CONCLUSION These data show that a combination of RAL 0.1% and glycolic acid 6% may be used in association with other topical anti-acne treatments (benzoyl peroxide and topical antibiotics) with an excellent tolerance.
Collapse
Affiliation(s)
- B Dréno
- Department of Dermatology, CHU Nantes, Nantes, France.
| | | | | | | | | | | | | |
Collapse
|
38
|
Feuillade M, Croutxé-Barghorn C, Mager L, Carré C, Fort A. Photopatterning of hybrid sol–gel glasses: generation of volume phase gratings under visible light. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.09.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
39
|
Roignant JY, Carré C, Mugat B, Szymczak D, Lepesant JA, Antoniewski C. Absence of transitive and systemic pathways allows cell-specific and isoform-specific RNAi in Drosophila. RNA 2003; 9:299-308. [PMID: 12592004 PMCID: PMC1370397 DOI: 10.1261/rna.2154103] [Citation(s) in RCA: 163] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2002] [Accepted: 12/09/2002] [Indexed: 05/18/2023]
Abstract
RNA interference (RNAi) designates the multistep process by which double-stranded RNA induces the silencing of homologous endogenous genes. Some aspects of RNAi appear to be conserved throughout evolution, including the processing of trigger dsRNAs into small 21-23-bp siRNAs and their use to guide the degradation of complementary mRNAs. Two remarkable features of RNAi were uncovered in plants and Caenorhabditid elegans. First, RNA-dependent RNA polymerase activities allow the synthesis of siRNA complementary to sequences upstream of or downstream from the initial trigger region in the target mRNA, leading to a transitive RNAi with sequences that had not been initially targeted. Secondly, systemic RNAi may cause the targeting of gene silencing in one tissue to spread to other tissues. Using transgenes expressing dsRNA, we investigated whether transitive and systemic RNAi occur in Drosophila. DsRNA-producing transgenes targeted RNAi to specific regions of alternative mRNA species of one gene without transitive effect directed to sequences downstream from or upstream of the initial trigger region. Moreover, specific expression of a dsRNA, using either cell-specific GAL4 drivers or random clonal activation of a GAL4 driver, mediated a cell-autonomous RNAi. Together, our results provide evidence that transitive and systemic aspects of RNAi are not conserved in Drosophila and demonstrate that dsRNA-producing transgenes allow powerful reverse genetic approaches to be conducted in this model organism, by knocking down gene functions at the resolution of a single-cell type and of a single isoform.
Collapse
Affiliation(s)
- Jean-Yves Roignant
- Institut Jacques Monod, Unité Mixte de Recherche 7592, Centre National de la Recherche Scientifique, Université Paris 6 et Université Paris 7. 75251 Paris cedex 05, France
| | | | | | | | | | | |
Collapse
|
40
|
Carré D, Carré C. Origin of germ cells, sex determination, and sex inversion in medusae of the genus Clytia (Hydrozoa, leptomedusae): the influence of temperature. J Exp Zool 2000; 287:233-42. [PMID: 10900443 DOI: 10.1002/1097-010x(20000801)287:3<233::aid-jez5>3.3.co;2-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In Cnidaria, a separation between soma and germline remains unclear. In this work, we studied the origin of germinal cells and determination of the sexual phenotype in Clytia hemisphaerica and Clytia sp. Colonies of C. Hemisphaerica were cultivated and the medusae liberated by each colony raised until maturity. Two hermaphrodite colonies were obtained, liberating male and female medusae. These two colonies and their medusae were raised at 15 degrees C, 21 degrees C, or 24 degrees C. The medusae budded and cultured at 24 degrees C were mainly female (80%). In contrast, if the medusae were released at 15 degrees C, at whatever temperature they were raised later, they were mainly male (85%). The same occurred if, after release at 24 degrees C but before the formation of the gametes, they were kept at 15 degrees C for at least 24 hr. We suggest that there are two subpopulations of germ cells. The female line will be dominant at 24 degrees C but temperature sensitive, with inhibition of this line by a temperature drop to 15 degrees C, this inverting the population sex-ratio. The irreversible action of a temperature drop to 15 degrees C supports the view that the germ cells are isolated very early. In C. hemisphaerica, hermaphrodite medusae were never observed. On the contrary, in Clytia sp., probably a new species, we have found male, female, but also hermaphrodite specimens. This is the second definite example of hermaphroditism described in any hydromedusan. The transformation of female into hermaphrodite then into male specimens occurs at 13 degrees C. These results demonstrate the unstable character of genetic sex determination in cnidarians, at least in certain species.
Collapse
Affiliation(s)
- D Carré
- UMR 7009, CNRS, Observatoire Océanologique, F-06234, Villefranche-sur-Mer, France.
| | | |
Collapse
|
41
|
Abstract
Chaetognath muscle fibres resemble vertebrate muscle fibres in having an abundant sarcoplasmic reticulum (SR) and analogues of the transverse (T) tubular system. but contraction is regulated differently. In intact chaetognaths electrically-evoked contractions of the striated locomotor muscles were largely or totally blocked by d-tubocurarine, by surgical removal of the ventral ganglion and by Co2 +. Contractions of single cells enzymatically dissociated from locomotor muscles were likewise blocked by Co2+, they twitched once only after calciseptine, showed neither contractures nor elevated intracellular Ca2+ with caffeine, and ryanodine did not block contractions. Whole cell voltage-clamped locomotor muscle cells displayed a typical inward rectified Ca2 + current that was sensitive to the Ca2+ channel blockers nifedipine and calciseptine and showed voltage-dependent activation with a threshold at approximately-25 mV and a peak inward current at approximately + 10 mV. In contrast, whole cell voltage-clamped cells from the muscles operating the grasping spines of the head showed an initial very rapid and rapidly-inactivating inward current abolished by tetrodotoxin (TTX), followed by a slower and slowly-inactivating inward current blocked by calciseptine. The relation between these observations and the unusual 'vertebrate-like' structure of the muscle cells is discussed.
Collapse
Affiliation(s)
- I Tsutsui
- National Institute for Physiological Science, Okazaki, Japan
| | | | | | | |
Collapse
|
42
|
Roisman GL, Lacronique JG, Desmazes-Dufeu N, Carré C, Le Cae A, Dusser DJ. Airway responsiveness to bradykinin is related to eosinophilic inflammation in asthma. Am J Respir Crit Care Med 1996; 153:381-90. [PMID: 8542147 DOI: 10.1164/ajrccm.153.1.8542147] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
We investigated the relationship between airway inflammation and airway responsiveness, as assessed by PD15, to methacholine and to bradykinin in asthmatic patients. Bronchoalveolar lavage (BAL), bronchial biopsies, and methacholine and bradykinin challenges were performed in 18 nonsmoking subjects with mild or moderate perennial asthma. Bradykinin PD15 correlated negatively with eosinophil count in BAL (p < 0.05), in the epithelium (p < 0.05), in the lamina propria (p = 0.02) and in the total submucosa (p < 0.01). Conversely, no significant correlation existed between airway responsiveness to methacholine and eosinophil count in BAL or in airway mucosa. Airway responsiveness to either agonist did not correlate with the thickness of the basement membrane, the shedding of the airway epithelium, the count of lymphocytes in the airway mucosa, or the percentage of neutrophils, lymphocytes, and macrophage in BAL. The presence of degranulated eosinophils was associated with an increased number of eosinophils in the airway epithelium (p = 0.04), in the lamina propria (p = 0.03), in the total submucosa (p = 0.02), and with increased airway responsiveness to bradykinin (p < 0.02). We conclude that in asthmatic patients, airway responsiveness to bradykinin but not to methacholine is related to the magnitude of eosinophilic inflammation in the airway mucosa.
Collapse
Affiliation(s)
- G L Roisman
- Service de Pneumologie, U.F.R. Cochin-Port-Royal, Université René Descartes, Paris, France
| | | | | | | | | | | |
Collapse
|
43
|
Touvay C, Vilain B, Carré C, Mencia-Huerta JM, Braquet P. Effect of limonene and sobrerol on monocrotaline-induced lung alterations and pulmonary hypertension. Int Arch Allergy Immunol 1995; 107:272-4. [PMID: 7542078 DOI: 10.1159/000237000] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The effects of two monocyclic monoterpenes, limonene and sobrerol, known as inhibitors of farnesyltransferase activity, were studied on monocrotaline (MCT)-induced lung injury, pulmonary hypertension and right ventricular hypertrophy in male Wistar rats. After 14 days, pulmonary arterial pressure values and the right ventricle to left ventricle plus septum weight ratios, RV/(LV + S), were markedly increased in rats subcutaneously injected with MCT (60 mg/kg). Limonene and sobrerol, administered daily at the oral dose of 400 mg/rat, markedly decreased the MCT-induced alterations. After treatment for 21 days, limonene still prevented pulmonary hypertension and the increase in RV/(LV + S). Both monoterpenes also reduced the increase in pulmonary arterial media thickness, the development of interstitial fibrosis and the increase in the number of macrophages in intra-alveolar spaces and of lymphocytes around the pulmonary veins. The present data indicate that treatment of rats with inhibitors of farnesyltransferase, like limonene and sobrerol, regulate the development of pulmonary hypertension.
Collapse
MESH Headings
- Alkyl and Aryl Transferases
- Animals
- Cyclohexenes
- Drug Evaluation, Preclinical
- Farnesyltranstransferase
- Hypertension, Pulmonary/chemically induced
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/prevention & control
- Hypertrophy, Right Ventricular/chemically induced
- Hypertrophy, Right Ventricular/physiopathology
- Hypertrophy, Right Ventricular/prevention & control
- Limonene
- Lung/blood supply
- Lung/drug effects
- Lung/pathology
- Male
- Monocrotaline/toxicity
- Muscle Proteins/metabolism
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/pathology
- Neovascularization, Pathologic/chemically induced
- Neovascularization, Pathologic/prevention & control
- Protein Prenylation/drug effects
- Protein Processing, Post-Translational/drug effects
- Pulmonary Artery/drug effects
- Pulmonary Artery/pathology
- Rats
- Rats, Sprague-Dawley
- Terpenes/pharmacology
- Terpenes/therapeutic use
- Transferases/antagonists & inhibitors
Collapse
Affiliation(s)
- C Touvay
- Institut Henri Beaufour, Les Ulis, France
| | | | | | | | | |
Collapse
|
44
|
Lagente V, Carré C, Kyriacopoulos F, Boichot E, Mencia-Huerta JM, Braquet P. Inhibitory effect of cyclosporin A on eosinophil infiltration in the guinea-pig lung induced by antigen, platelet-activating factor and leukotriene B4. Eur Respir J 1994; 7:921-6. [PMID: 8050549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The effect of the immunosuppressive compound, cyclosporin A, and the corticosteroid, betamethasone, was investigated on eosinophil accumulation in guinea-pig lung tissue induced by antigen, platelet-activating factor (PAF) and leukotriene B4 (LTB4). The accumulation of eosinophils in the peribronchial area was evaluated on histological preparations. The lung sections were stained with Luna's reagent specific for eosinophil granule content. Oral treatment of the guinea-pigs with cyclosporin, 10 mg.kg-1 three times a day for two days, and 10 mg.kg-1 1 h before antigen challenge, significantly reduced the accumulation of eosinophils observed at 4 and 24 h, in the peribronchial area of sensitized guinea-pig lung. Betamethasone (3 mg.kg-1), administered orally 24 h and 1 h before antigen challenge elicited a moderate but significant reduction of antigen-induced eosinophil accumulation. Pretreatment of the guinea-pigs with cyclosporin or betamethasone elicited a marked inhibition of the accumulation of eosinophils in the peribronchial area induced by aerosolized PAF (100 micrograms.ml-1) or LTB4 (5 micrograms.ml-1). Since cyclosporin and betamethasone significantly inhibit the antigen-induced eosinophil accumulation, these results suggest that antigen-induced lung eosinophilia is dependent of T-lymphocytes. However, cyclosporin and betamethasone may also reduce the chemotactic activity of PAF and LTB4 on guinea-pig eosinophils.
Collapse
Affiliation(s)
- V Lagente
- Laboratoire de Pharmacodynamie, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, France
| | | | | | | | | | | |
Collapse
|
45
|
|
46
|
Abdelfattah A, Rayet P, Carré C. [Neuro-psychiatric effects of cimetidine: a case report]. Ann Med Psychol (Paris) 1993; 151:475-7. [PMID: 8279733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- A Abdelfattah
- Practicien Hospitalier, Service de Psychiatrie, Hôpital de La Châtre
| | | | | |
Collapse
|
47
|
Carré C, Habraken S, Roose S. Computer-originated polarizing holographic optical element recorded in photopolymerizable layers. Opt Lett 1993; 18:738-740. [PMID: 19802257 DOI: 10.1364/ol.18.000738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The photosensitive system that is used in most cases to produce holographic optical holograms is dichromated gelatin. Other materials may be used, in particular, photopolymerizable layers. In the present investigation, we set out to use the polymer developed in the Laboratoire de Photochimie Générale in Mulhouse in order to duplicate a computer-generated hologram. Our technique is intended to generate polarizing properties. We took into account the fact that no wet chemistry processing is required; grating fringe spacings are not distorted through chemical development.
Collapse
|
48
|
Lavaud P, Rodrigue F, Carré C, Touvay C, Mencia-Huerta JM, Braquet P. Pharmacologic modulation of picryl chloride-induced contact dermatitis in the mouse. J Invest Dermatol 1991; 97:101-5. [PMID: 2056180 DOI: 10.1111/1523-1747.ep12478438] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A biphasic response of ear swelling was observed 2 h and 24 h after application of the antigen to picryl chloride-sensitized Balb/c mice. A platelet-activating factor (PAF) antagonist, BN 52063, or the anti-inflammatory drug, betamethasone, applied topically or injected subcutaneously, inhibited in a dose-dependent fashion the antigen-induced increase in ear thickness observed after 24 h. In addition, BN 52063 and betamethasone presented a synergistic effect when administered in vivo simultaneously and subcutaneously. Indomethacin administered subcutaneously at the time of the antigen challenge significantly potentiated the early swelling phase and inhibited the late one. In contrast, the inhibitors of histamine and serotonin, ketotifen and methysergide, respectively, modulated mostly the early, and to a lower extent the late phase when administered at the time of antigen challenge. In contrast, none of these drugs inhibited the late phase reaction when administered 4 h after the antigen. A significant eosinophil and mononuclear-cell ear infiltrate was observed following topical application of the antigen, a phenomenon that was markedly reduced by either BN 52063 or betamethasone. These results demonstrate the effectiveness of PAF antagonists, either alone or in association with glucocorticosteroids, in experimental CD, the modulation of the infiltration of eosinophils and mononuclear cells possibly explaining part of the inhibitory action of these drugs.
Collapse
Affiliation(s)
- P Lavaud
- Department of Immunology, Institut Henri Beaufour, Les Ulis, France
| | | | | | | | | | | |
Collapse
|
49
|
Szabo ME, Droy-Lefaix MT, Doly M, Carré C, Braquet P. Ischemia and reperfusion-induced histologic changes in the rat retina. Demonstration of a free radical-mediated mechanism. Invest Ophthalmol Vis Sci 1991; 32:1471-8. [PMID: 2016129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Histologic alterations of ischemia- and reperfusion-induced retinal damage are critically dependent on the duration of the period of ischemia. Male Sprague Dawley rats were anesthetized, and a suture was placed behind the globe including the central retinal artery. Because it was desirable that untreated eyes show a great histologic change due to reperfusion-induced damage (in order that maximum scope would exist for demonstration of any protective effect of a drug treatment), a preliminary series of studies established the time-induced characteristics for the retina with transient regional ischemia. Eyes (n = 6-12 in each group) were subjected to 30, 60, or 90 min of ischemia followed by 0.5, 1, 2, 4, and 24 hr of reperfusion, respectively. The 30-min ischemia followed by reperfusion did not result in any histologic changes; 60-min ischemia followed by reperfusion induced a moderate retinal edema which returned to the preischemic value after 24 hr of reperfusion. The 90-min ischemia followed by reperfusion further aggravated retinal edema and increased the migration of neutrophil leukocytes. Even after 24 hr of reperfusion, the retinal edema had not disappeared although an attenuation was observed. In this study, the rats were treated with superoxide dismutase (SOD-PEG, 15 x 10(3) U/kg) or EGB 761 (100 mg/kg) for 10 days (chronic treatment). The SOD and EGB 761 significantly reduced the development of reperfusion-induced retinal edema and significantly prevented the neutrophil leukocyte infiltration. Both also had a protective effect against reperfusion-induced injury when these agents were administered just before reperfusion ("late" administration).(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- M E Szabo
- Institut Henri Beaufour, Courtaboeuf, France
| | | | | | | | | |
Collapse
|
50
|
Touvay C, Pfister A, Vilain B, Carré C, Page CP, Lellouch-Tubiana A, Pignol B, Mencia-Huerta JM, Braquet P. Effect of long-term infusion of platelet-activating factor on pulmonary responsiveness and morphology in the guinea-pig. Pulm Pharmacol 1991; 4:43-51. [PMID: 1804494 DOI: 10.1016/0952-0600(91)90038-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The effect of chronic administration of platelet-activating factor (PAF) on airway reactivity, cell recruitment and lung morphology in the guinea-pig has been investigated. Alzet osmotic minipumps delivering either PAF (7.2 mg/kg/14 days) in 0.25% (w/v) bovine serum albumin in saline (saline-BSA), acetylcholine or saline-BSA alone were implanted s.c. in the neck region of guinea-pigs and connected to the jugular vein. In some experiments, implanted and non-implanted animals were treated daily with the PAF antagonist, BN 52021 (15 mg/kg, twice a day, p.o.). On day 15 after minipump implantation, the animals were anesthetized with urethane (1.2 g/kg, i.p.) and tracheal cannula was inserted for mechanical ventilation. Pulmonary inflation pressure (PIP) was monitored and airway responsiveness was assessed by administration of increasing doses of histamine (0.2-100 micrograms/kg, i.v.). As compared to saline-BSA-treated or non-implanted guinea-pigs, chronic treatment of the animals with PAF induced a significant (p less than 0.01) increase in airway response. No significant change in airway responsiveness was observed following chronic acetylcholine administration. In contrast, regardless of the treatment of the animals, no change in the threshold dose of histamine inducing alteration in PIP was noted, suggesting that PAF induces bronchopulmonary hyperreactivity rather than hyperresponsiveness. In addition, no significant difference was observed in the in vitro responsiveness to histamine of lung parenchymal strips from animals having received PAF or saline-BSA.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- C Touvay
- Institut Henri Beaufour, Les Ulis, France
| | | | | | | | | | | | | | | | | |
Collapse
|