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Millet AMC, Coustham C, Champigny C, Botella M, Demeilliers C, Devin A, Galinier A, Belenguer P, Bordeneuve-Guibé J, Davezac N. OPA1 deficiency impairs oxidative metabolism in cycling cells, underlining a translational approach for degenerative diseases. Dis Model Mech 2023; 16:dmm050266. [PMID: 37497665 PMCID: PMC10538295 DOI: 10.1242/dmm.050266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/12/2023] [Indexed: 07/28/2023] Open
Abstract
Dominant optic atrophy is an optic neuropathy with varying clinical symptoms and progression. A severe disorder is associated with certain OPA1 mutations and includes additional symptoms for >20% of patients. This underscores the consequences of OPA1 mutations in different cellular populations, not only retinal ganglionic cells. We assessed the effects of OPA1 loss of function on oxidative metabolism and antioxidant defences using an RNA-silencing strategy in a human epithelial cell line. We observed a decrease in the mitochondrial respiratory chain complexes, associated with a reduction in aconitase activity related to an increase in reactive oxygen species (ROS) production. In response, the NRF2 (also known as NFE2L2) transcription factor was translocated into the nucleus and upregulated SOD1 and GSTP1. This study highlights the effects of OPA1 deficiency on oxidative metabolism in replicative cells, as already shown in neurons. It underlines a translational process to use cycling cells to circumvent and describe oxidative metabolism. Moreover, it paves the way to predict the evolution of dominant optic atrophy using mathematical models that consider mitochondrial ROS production and their detoxifying pathways.
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Affiliation(s)
- Aurélie M. C. Millet
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | - Corentin Coustham
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
- ISAE-SUPAERO, Toulouse University, 31400 Toulouse, France
| | - Camille Champigny
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | - Marlène Botella
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | | | - Anne Devin
- Laboratoire Métabolisme Energétique Cellulaire IBGC du CNRS, 1 rue Camille Saint Saëns, 33077 Bordeaux cedex, France
| | - Anne Galinier
- RESTORE – Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, Inserm U1031, UPS, Bâtiment INCERE, 4bis avenue Hubert Curien, 31100 Toulouse, France
| | - Pascale Belenguer
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | | | - Noélie Davezac
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
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Stiti S, Caroux L, Gaillard P, Paubel PV, Deguine O. Innovative protocol of an exploratory study evaluating the acceptability of a humanoid robot at home of deaf children with cochlear implants. PLoS One 2023; 18:e0285927. [PMID: 37327230 PMCID: PMC10275444 DOI: 10.1371/journal.pone.0285927] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 06/18/2023] Open
Abstract
The purpose of this paper is to introduce a research methodology for the assessment of the acceptability of a humanoid robot at home for children with cochlear implants (CI). The quality of audiology rehabilitation for cochlear implanted child administrated at the hospital with pluri-weekly sessions is a major prognostic factor in the outcome on communications abilities, but represents also a constraint for families related to the access to care that are more difficult. Further, home training with tools would balance the equitable distribution of care in the territory and promote the child's progress. The humanoid robot should allow an ecological approach to this complementary training. Before developing this approach, it is necessary to study the acceptability of the humanoid robot at home, both by cochlear implanted child and their families. Ten families were chosen to have a humanoid robot at home, to explore their acceptability of the humanoid robot Pepper. The study lasts for 1 month per participants (i.e. cochlear implemented children and parent). Participants were invited to use the robot at home as much as they want. The humanoid robot Pepper was able to communicate and proposed activities not related to rehabilitation. Once a week during the study, data were collected from participants (questionnaires and robot's logs) and the smooth running of the study was checked. Questionnaires are used to evaluate the acceptability of the robot by children and parents. User data from the robot's logs are used to quantify the time and the actual use of the robot over the period of the study. Results of the experimentation will be reported, once all 10 participants have completed their passation. The robot is anticipated to be used and accepted by children with cochlear implants and their families. Clinical trial registration: Clinical Trials ID: NCT04832373; https://clinicaltrials.gov/.
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Affiliation(s)
- Sabrina Stiti
- Laboratoire Cognition, Langues, Langage, Ergonomie (CLLE), Université Toulouse Jean Jaurès & CNRS, Toulouse, France
- Le Centre de Recherche Cerveau et Cognition (CerCo), Université Paul Sabatier & CNRS, Toulouse, France
| | - Loïc Caroux
- Laboratoire Cognition, Langues, Langage, Ergonomie (CLLE), Université Toulouse Jean Jaurès & CNRS, Toulouse, France
| | - Pascal Gaillard
- Laboratoire Cognition, Langues, Langage, Ergonomie (CLLE), Université Toulouse Jean Jaurès & CNRS, Toulouse, France
| | - Pierre-Vincent Paubel
- Laboratoire Cognition, Langues, Langage, Ergonomie (CLLE), Université Toulouse Jean Jaurès & CNRS, Toulouse, France
| | - Olivier Deguine
- Le Centre de Recherche Cerveau et Cognition (CerCo), Université Paul Sabatier & CNRS, Toulouse, France
- Service D’oto-rhino-laryngologie, Oto-neurologie et O.R.L Pédiatrique, CHU Toulouse, Hôpital Pierre-Paul Riquet, Toulouse, France
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Jullien D, Guillou E, Bernat-Fabre S, Payet A, Bourbon HMG, Boube M. Inducible degradation of the Drosophila Mediator subunit Med19 reveals its role in regulating developmental but not constitutively-expressed genes. PLoS One 2022; 17:e0275613. [PMID: 36445897 PMCID: PMC9707739 DOI: 10.1371/journal.pone.0275613] [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: 06/28/2022] [Accepted: 09/20/2022] [Indexed: 11/30/2022] Open
Abstract
The multi-subunit Mediator complex plays a critical role in gene expression by bridging enhancer-bound transcription factors and the RNA polymerase II machinery. Although experimental case studies suggest differential roles of Mediator subunits, a comprehensive view of the specific set of genes regulated by individual subunits in a developing tissue is still missing. Here we address this fundamental question by focusing on the Med19 subunit and using the Drosophila wing imaginal disc as a developmental model. By coupling auxin-inducible degradation of endogenous Med19 in vivo with RNA-seq, we got access to the early consequences of Med19 elimination on gene expression. Differential gene expression analysis reveals that Med19 is not globally required for mRNA transcription but specifically regulates positively or negatively less than a quarter of the expressed genes. By crossing our transcriptomic data with those of Drosophila gene expression profile database, we found that Med19-dependent genes are highly enriched with spatially-regulated genes while the expression of most constitutively expressed genes is not affected upon Med19 loss. Whereas globally downregulation does not exceed upregulation, we identified a functional class of genes encoding spatially-regulated transcription factors, and more generally developmental regulators, responding unidirectionally to Med19 loss with an expression collapse. Moreover, we show in vivo that the Notch-responsive wingless and the E(spl)-C genes require Med19 for their expression. Combined with experimental evidences suggesting that Med19 could function as a direct transcriptional effector of Notch signaling, our data support a model in which Med19 plays a critical role in the transcriptional activation of developmental genes in response to cell signaling pathways.
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Affiliation(s)
- Denis Jullien
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
- * E-mail: (MB); (DJ)
| | - Emmanuelle Guillou
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
| | - Sandra Bernat-Fabre
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
| | - Adeline Payet
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
| | - Henri-Marc G. Bourbon
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
| | - Muriel Boube
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit UMR 5077, Federal University of Toulouse, Toulouse, France
- RESTORE Research Center, Université de Toulouse, INSERM 1301, CNRS 5070, EFS, ENVT, Toulouse, France
- * E-mail: (MB); (DJ)
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Bourbon HMG, Benetah MH, Guillou E, Mojica-Vazquez LH, Baanannou A, Bernat-Fabre S, Loubiere V, Bantignies F, Cavalli G, Boube M. A shared ancient enhancer element differentially regulates the bric-a-brac tandem gene duplicates in the developing Drosophila leg. PLoS Genet 2022; 18:e1010083. [PMID: 35294439 PMCID: PMC8959175 DOI: 10.1371/journal.pgen.1010083] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 03/28/2022] [Accepted: 02/07/2022] [Indexed: 11/18/2022] Open
Abstract
Gene duplications and transcriptional enhancer emergence/modifications are thought having greatly contributed to phenotypic innovations during animal evolution. Nevertheless, little is known about how enhancers evolve after gene duplication and how regulatory information is rewired between duplicated genes. The Drosophila melanogaster bric-a-brac (bab) complex, comprising the tandem paralogous genes bab1 and bab2, provides a paradigm to address these issues. We previously characterized an intergenic enhancer (named LAE) regulating bab2 expression in the developing legs. We show here that bab2 regulators binding directly the LAE also govern bab1 expression in tarsal cells. LAE excision by CRISPR/Cas9-mediated genome editing reveals that this enhancer appears involved but not strictly required for bab1 and bab2 co-expression in leg tissues. Instead, the LAE enhancer is critical for paralog-specific bab2 expression along the proximo-distal leg axis. Chromatin features and phenotypic rescue experiments indicate that LAE functions partly redundantly with leg-specific regulatory information overlapping the bab1 transcription unit. Phylogenomics analyses indicate that (i) the bab complex originates from duplication of an ancestral singleton gene early on within the Cyclorrhapha dipteran sublineage, and (ii) LAE sequences have been evolutionarily-fixed early on within the Brachycera suborder thus predating the gene duplication event. This work provides new insights on enhancers, particularly about their emergence, maintenance and functional diversification during evolution.
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Affiliation(s)
- Henri-Marc G. Bourbon
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Mikhail H. Benetah
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Emmanuelle Guillou
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Luis Humberto Mojica-Vazquez
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Aissette Baanannou
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Sandra Bernat-Fabre
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
| | - Vincent Loubiere
- Institute of Human Genetics, University of Montpellier, CNRS Montpellier, France
| | - Frédéric Bantignies
- Institute of Human Genetics, University of Montpellier, CNRS Montpellier, France
| | - Giacomo Cavalli
- Institute of Human Genetics, University of Montpellier, CNRS Montpellier, France
| | - Muriel Boube
- Center for Integrative Biology, Molecular Cellular and Developmental (MCD) Biology Unit, Federal University of Toulouse, Toulouse, France
- * E-mail:
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Tahar M. Biological constraints as norms in evolution. Hist Philos Life Sci 2022; 44:9. [PMID: 35239015 PMCID: PMC8894210 DOI: 10.1007/s40656-022-00483-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
Biology seems to present local and transitory regularities rather than immutable laws. To account for these historically constituted regularities and to distinguish them from mathematical invariants, Montévil and Mossio (Journal of Theoretical Biology 372:179-191, 2015) have proposed to speak of constraints. In this article we analyse the causal power of these constraints in the evolution of biodiversity, i.e., their positivity, but also the modality of their action on the directions taken by evolution. We argue that to fully account for the causal power of these constraints on evolution, they must be thought of in terms of normativity. In this way, we want to highlight two characteristics of the evolutionary constraints. The first, already emphasised as reported by Gould (The structure of evolutionary theory, Harvard University Press, 2002), is that these constraints are both produced by and producing biological evolution and that this circular causation creates true novelties. The second is that this specific causality, which generates unpredictability in evolution, stems not only from the historicity of biological constraints, but also from their internalisation through the practices of living beings.
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Affiliation(s)
- Mathilde Tahar
- ERRAPHIS, Université Toulouse II - Jean Jaurès, Toulouse, France.
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Poulain JP, Tibère L, Mognard E, Laporte C, Fournier T, Noor IM, Dasgupta A, Alem Y, Naidoo K, Dupuy A, Rochedy A, Nair PK, Ragavan NA. The Malaysian Food Barometer Open Database: An Invitation to Study the Modernization of Malaysian Food Patterns and Its Economic and Health Consequences. Front Nutr 2022; 8:800317. [PMID: 35127788 PMCID: PMC8809384 DOI: 10.3389/fnut.2021.800317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 12/06/2021] [Indexed: 12/03/2022] Open
Affiliation(s)
- Jean-Pierre Poulain
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
- *Correspondence: Jean-Pierre Poulain
| | - Laurence Tibère
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Elise Mognard
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Cyrille Laporte
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Tristan Fournier
- Institut de Recherche Interdisciplinaire sur les Enjeux Sociaux (IRIS), Centre National de la Recherche Scientifique (CNRS), Paris, France
| | - Ismail Mohd Noor
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Anindita Dasgupta
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
- Faculty of Social Sciences and Leisure Management, Taylor's University, Subang Jaya, Malaysia
| | - Yasmine Alem
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Kremlasen Naidoo
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Anne Dupuy
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
| | - Amandine Rochedy
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Chair ≪ Food Studies: Food, Cultures & Health ≫, Université de Toulouse, Toulouse, France
- Faculty of Social Sciences and Leisure Management, University Malaysia, Subang Jaya, Malaysia
| | - Pradeep Kumar Nair
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
| | - Neethianhantan Ari Ragavan
- Centre d'Études et de Recherche: Travail, Organisation, Pouvoir (CERTOP) UMR CNRS 5044, Université de Toulouse, Toulouse, France
- Center for Asian Modernisation Studies (CAMS), Taylor's University, Subang Jaya, Malaysia
- Institut de Recherche Interdisciplinaire sur les Enjeux Sociaux (IRIS), Centre National de la Recherche Scientifique (CNRS), Paris, France
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Libourel C, Baron E, Lenglet J, Amsellem L, Roby D, Roux F. The Genomic Architecture of Competitive Response of Arabidopsis thaliana Is Highly Flexible Among Plurispecific Neighborhoods. Front Plant Sci 2021; 12:741122. [PMID: 34899774 PMCID: PMC8656689 DOI: 10.3389/fpls.2021.741122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/11/2021] [Indexed: 06/14/2023]
Abstract
Plants are daily challenged by multiple abiotic and biotic stresses. A major biotic constraint corresponds to competition with other plant species. Although plants simultaneously interact with multiple neighboring species throughout their life cycle, there is still very limited information about the genetics of the competitive response in the context of plurispecific interactions. Using a local mapping population of Arabidopsis thaliana, we set up a genome wide association study (GWAS) to estimate the extent of genetic variation of competitive response in 12 plant species assemblages, based on three competitor species (Poa annua, Stellaria media, and Veronica arvensis). Based on five phenotypic traits, we detected strong crossing reaction norms not only between the three bispecific neighborhoods but also among the plurispecific neighborhoods. The genetic architecture of competitive response was highly dependent on the identity and the relative abundance of the neighboring species. In addition, most of the enriched biological processes underlying competitive responses largely differ among neighborhoods. While the RNA related processes might confer a broad range response toolkit for multiple traits in diverse neighborhoods, some processes, such as signaling and transport, might play a specific role in particular assemblages. Altogether, our results suggest that plants can integrate and respond to different species assemblages depending on the identity and number of each neighboring species, through a large range of candidate genes associated with diverse and unexpected processes leading to developmental and stress responses.
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Affiliation(s)
- Cyril Libourel
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
| | - Etienne Baron
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Juliana Lenglet
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Laurent Amsellem
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Dominique Roby
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
| | - Fabrice Roux
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
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Haim L, Robert F, Peres L, Lecante P, Philippot K, Poteau R, Respaud M, Amiens C. Correlation between surface chemistry and magnetism in iron nanoparticles. Nanoscale Adv 2021; 3:4471-4481. [PMID: 36133455 PMCID: PMC9419664 DOI: 10.1039/d1na00258a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/22/2021] [Indexed: 06/16/2023]
Abstract
To shed light on the factors governing the stability and surface properties of iron nanoparticles, a series of iron nanoparticles has been produced by hydrogenation of two different iron amido complexes: the bis[bis(trimethylsilyl)amido] Fe(ii), [Fe(N(SiMe3)2)2]2, and the bis(diphenylamido) Fe(ii), [Fe(NPh2)2]. Nanostructured materials of bcc structure, or nanoparticles displaying average sizes below 3 nm and a polytetrahedral structure, have been obtained. Depending on the synthesis conditions, the magnetization of the nanoparticles was either significantly lower than that of bulk iron, or much higher as for clusters elaborated under high vacuum conditions. Unexpectedly, hydrogenation of aromatic groups of the ligands of the [Fe(NPh2)2] precursor has been observed in some cases. Confrontation of the experimental results with DFT calculations made on polytetrahedral Fe91 model clusters bearing hydrides, amido and/or amine ligands at their surface, has shown that amido ligands can play a key role in the stabilisation of the nanoparticles in solution while the hydride surface coverage governs their surface magnetic properties. This study indicates that magnetic measurements give valuable indicators of the surface properties of iron nanoparticles in this size range, and beyond, of their potential reactivity.
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Affiliation(s)
- Lorraine Haim
- LCC (Laboratoire de Chimie de Coordination) BP44099, 205 route de Narbonne F-31077 Toulouse Cedex 4 France
- Université de Toulouse, UPS, INPT F-31077 Toulouse Cedex 4 France
- CEMES (Centre d'Elaboration de Matériaux et d'Etudes Structurales), CNRS 29 rue J. Marvig F-31055 Toulouse France
| | - François Robert
- LCC (Laboratoire de Chimie de Coordination) BP44099, 205 route de Narbonne F-31077 Toulouse Cedex 4 France
- Université de Toulouse, UPS, INPT F-31077 Toulouse Cedex 4 France
| | - Laurent Peres
- LCC (Laboratoire de Chimie de Coordination) BP44099, 205 route de Narbonne F-31077 Toulouse Cedex 4 France
- Université de Toulouse, UPS, INPT F-31077 Toulouse Cedex 4 France
| | - Pierre Lecante
- CEMES (Centre d'Elaboration de Matériaux et d'Etudes Structurales), CNRS 29 rue J. Marvig F-31055 Toulouse France
| | - Karine Philippot
- LCC (Laboratoire de Chimie de Coordination) BP44099, 205 route de Narbonne F-31077 Toulouse Cedex 4 France
- Université de Toulouse, UPS, INPT F-31077 Toulouse Cedex 4 France
| | - Romuald Poteau
- LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), UMR 5215 INSA, CNRS, UPS 135 Avenue de Rangueil F-31077 Toulouse Cedex 4 France
| | - Marc Respaud
- CEMES (Centre d'Elaboration de Matériaux et d'Etudes Structurales), CNRS 29 rue J. Marvig F-31055 Toulouse France
- LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), UMR 5215 INSA, CNRS, UPS 135 Avenue de Rangueil F-31077 Toulouse Cedex 4 France
| | - Catherine Amiens
- LCC (Laboratoire de Chimie de Coordination) BP44099, 205 route de Narbonne F-31077 Toulouse Cedex 4 France
- Université de Toulouse, UPS, INPT F-31077 Toulouse Cedex 4 France
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Lavigne M, Helynck O, Rigolet P, Boudria-Souilah R, Nowakowski M, Baron B, Brülé S, Hoos S, Raynal B, Guittat L, Beauvineau C, Petres S, Granzhan A, Guillon J, Pratviel G, Teulade-Fichou MP, England P, Mergny JL, Munier-Lehmann H. SARS-CoV-2 Nsp3 unique domain SUD interacts with guanine quadruplexes and G4-ligands inhibit this interaction. Nucleic Acids Res 2021; 49:7695-7712. [PMID: 34232992 PMCID: PMC8287907 DOI: 10.1093/nar/gkab571] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 06/15/2021] [Accepted: 06/19/2021] [Indexed: 12/16/2022] Open
Abstract
The multidomain non-structural protein 3 (Nsp3) is the largest protein encoded by coronavirus (CoV) genomes and several regions of this protein are essential for viral replication. Of note, SARS-CoV Nsp3 contains a SARS-Unique Domain (SUD), which can bind Guanine-rich non-canonical nucleic acid structures called G-quadruplexes (G4) and is essential for SARS-CoV replication. We show herein that the SARS-CoV-2 Nsp3 protein also contains a SUD domain that interacts with G4s. Indeed, interactions between SUD proteins and both DNA and RNA G4s were evidenced by G4 pull-down, Surface Plasmon Resonance and Homogenous Time Resolved Fluorescence. These interactions can be disrupted by mutations that prevent oligonucleotides from folding into G4 structures and, interestingly, by molecules known as specific ligands of these G4s. Structural models for these interactions are proposed and reveal significant differences with the crystallographic and modeled 3D structures of the SARS-CoV SUD-NM/G4 interaction. Altogether, our results pave the way for further studies on the role of SUD/G4 interactions during SARS-CoV-2 replication and the use of inhibitors of these interactions as potential antiviral compounds.
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Affiliation(s)
- Marc Lavigne
- Institut Pasteur, Département de Virologie. CNRS UMR 3569, Paris, France
| | - Olivier Helynck
- Institut Pasteur, Unité de Chimie et Biocatalyse. CNRS UMR 3523, Paris, France
| | - Pascal Rigolet
- Institut Curie, Université Paris-Saclay, CNRS UMR 9187, Inserm U1196, Orsay, France
| | | | - Mireille Nowakowski
- Institut Pasteur, Plateforme de Production et Purification de Protéines Recombinantes, C2RT, CNRS UMR 3528, Paris, France
| | - Bruno Baron
- Institut Pasteur, Plateforme de Biophysique Moléculaire, C2RT, CNRS UMR 3528, Paris, France
| | - Sébastien Brülé
- Institut Pasteur, Plateforme de Biophysique Moléculaire, C2RT, CNRS UMR 3528, Paris, France
| | - Sylviane Hoos
- Institut Pasteur, Plateforme de Biophysique Moléculaire, C2RT, CNRS UMR 3528, Paris, France
| | - Bertrand Raynal
- Institut Pasteur, Plateforme de Biophysique Moléculaire, C2RT, CNRS UMR 3528, Paris, France
| | - Lionel Guittat
- Université Sorbonne Paris Nord, INSERM U978, Labex Inflamex, F-93017 Bobigny, France
- Laboratoire d’optique et Biosciences, Ecole Polytechnique, Inserm U1182, CNRS UMR7645, Institut Polytechnique de Paris, Palaiseau, France
| | - Claire Beauvineau
- Institut Curie, Université Paris-Saclay, CNRS UMR 9187, Inserm U1196, Orsay, France
| | - Stéphane Petres
- Institut Pasteur, Plateforme de Production et Purification de Protéines Recombinantes, C2RT, CNRS UMR 3528, Paris, France
| | - Anton Granzhan
- Institut Curie, Université Paris-Saclay, CNRS UMR 9187, Inserm U1196, Orsay, France
| | - Jean Guillon
- Inserm U1212, CNRS UMR 5320, Laboratoire ARNA, UFR des Sciences Pharmaceutiques, Université de Bordeaux, Bordeaux, France
| | - Geneviève Pratviel
- CNRS UPR 8241, Université Paul Sabatier, Laboratoire de Chimie de Coordination, Toulouse, France
| | | | - Patrick England
- Institut Pasteur, Plateforme de Biophysique Moléculaire, C2RT, CNRS UMR 3528, Paris, France
| | - Jean-Louis Mergny
- Laboratoire d’optique et Biosciences, Ecole Polytechnique, Inserm U1182, CNRS UMR7645, Institut Polytechnique de Paris, Palaiseau, France
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Rodriguez J, Tabey A, Mallet-Ladeira S, Bourissou D. Oxidative additions of alkynyl/vinyl iodides to gold and gold-catalyzed vinylation reactions triggered by the MeDalphos ligand. Chem Sci 2021; 12:7706-7712. [PMID: 34168822 PMCID: PMC8188461 DOI: 10.1039/d1sc01483h] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 04/22/2021] [Indexed: 11/28/2022] Open
Abstract
The hemilabile Ad2P(o-C6H4)NMe2 ligand promotes fast, quantitative and irreversible oxidative addition of alkynyl and vinyl iodides to gold. The reaction is general. It works with a broad range of substrates of various electronic bias and steric demand, and proceeds with complete retention of stereochemistry from Z and E vinyl iodides. Both alkynyl and vinyl iodides react faster than aryl iodides. The elementary step is amenable to catalysis. Oxidative addition of vinyl iodides to gold and π-activation of alkenols (and N-alkenyl amines) at gold have been combined to achieve hetero-vinylation reactions. A number of functionalized heterocycles, i.e. tetrahydrofuranes, tetrahydropyranes, oxepanes and pyrrolidines were obtained thereby (24 examples, 87% average yield). Taking advantage of the chemoselectivity for vinyl iodides over aryl iodides, sequential transformations involving first a hetero-vinylation step and then a C-N coupling, a C-C coupling or an heteroarylation were achieved from a vinyl/aryl bis-iodide substrate.
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Affiliation(s)
- Jessica Rodriguez
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Alexis Tabey
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Sonia Mallet-Ladeira
- Institut de Chimie de Toulouse (FR 2599) 118 Route de Narbonne 31062 Toulouse Cedex 09 France
| | - Didier Bourissou
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
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Abstract
Dermal/transdermal drug delivery continues to grow in importance as a means of enhancing treatment activity while reducing toxicity by avoiding the systemic absorption of the drug. At the same time, this has led to the adjustment of a wide diversity of drug carriers. This paper begins with a review of the skin, including its structure and the parameters that influence drug diffusion, followed by strategies to improve dermal drug delivery. Of the multitude of existing carriers, we will focus on the most advanced vectors in dermal/transdermal delivery, and in particular, on vesicular systems. This review will present the state of the art as well as the new trends in this domain. Through the description of these systems, we will try to obtain information on the ideal properties that the carrier must have in order to improve the cutaneous and transcutaneous penetration of the drug.
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Affiliation(s)
- Claire Richard
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623, Université Paul Sabatier 31062 Toulouse Cedex 4 France
| | - Stéphanie Cassel
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623, Université Paul Sabatier 31062 Toulouse Cedex 4 France
| | - Muriel Blanzat
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623, Université Paul Sabatier 31062 Toulouse Cedex 4 France
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Bennett AH, O’Donohue MF, Gundry SR, Chan AT, Widrick J, Draper I, Chakraborty A, Zhou Y, Zon LI, Gleizes PE, Beggs AH, Gupta VA. RNA helicase, DDX27 regulates skeletal muscle growth and regeneration by modulation of translational processes. PLoS Genet 2018. [PMID: 29518074 PMCID: PMC5843160 DOI: 10.1371/journal.pgen.1007226] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Gene expression in a tissue-specific context depends on the combined efforts of epigenetic, transcriptional and post-transcriptional processes that lead to the production of specific proteins that are important determinants of cellular identity. Ribosomes are a central component of the protein biosynthesis machinery in cells; however, their regulatory roles in the translational control of gene expression in skeletal muscle remain to be defined. In a genetic screen to identify critical regulators of myogenesis, we identified a DEAD-Box RNA helicase, DDX27, that is required for skeletal muscle growth and regeneration. We demonstrate that DDX27 regulates ribosomal RNA (rRNA) maturation, and thereby the ribosome biogenesis and the translation of specific transcripts during myogenesis. These findings provide insight into the translational regulation of gene expression in myogenesis and suggest novel functions for ribosomes in regulating gene expression in skeletal muscles.
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Affiliation(s)
- Alexis H. Bennett
- Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Marie-Francoise O’Donohue
- Laboratoire de Biologie Moléculaire Eucaryote, Centre de Biologie Intégrative (CBI), Université de Toulouse, UPS, CNRS, France
| | - Stacey R. Gundry
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Aye T. Chan
- Stem Cell Program and Pediatric Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Harvard Stem Cell Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jeffrey Widrick
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Isabelle Draper
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Anirban Chakraborty
- Laboratoire de Biologie Moléculaire Eucaryote, Centre de Biologie Intégrative (CBI), Université de Toulouse, UPS, CNRS, France
- Division of Molecular Genetics and Cancer, NU Centre for Science Education and Research, Nitte University, Mangalore, India
| | - Yi Zhou
- Stem Cell Program and Pediatric Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Harvard Stem Cell Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Leonard I. Zon
- Stem Cell Program and Pediatric Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Harvard Stem Cell Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- Howard Hughes Medical Institute, Boston, Massachusetts, United States of America
| | - Pierre-Emmanuel Gleizes
- Laboratoire de Biologie Moléculaire Eucaryote, Centre de Biologie Intégrative (CBI), Université de Toulouse, UPS, CNRS, France
| | - Alan H. Beggs
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Vandana A. Gupta
- Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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