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El Omar R, Abdellaoui N, Coulibaly ST, Fontenille L, Lanza F, Gachet C, Freund JN, Negroni M, Kissa K, Tavian M. Macrophage depletion overcomes human hematopoietic cell engraftment failure in zebrafish embryo. Cell Death Dis 2024; 15:305. [PMID: 38693109 PMCID: PMC11063059 DOI: 10.1038/s41419-024-06682-x] [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: 04/04/2023] [Revised: 04/06/2024] [Accepted: 04/15/2024] [Indexed: 05/03/2024]
Abstract
Zebrafish is widely adopted as a grafting model for studying human development and diseases. Current zebrafish xenotransplantations are performed using embryo recipients, as the adaptive immune system, responsible for host versus graft rejection, only reaches maturity at juvenile stage. However, transplanted primary human hematopoietic stem/progenitor cells (HSC) rapidly disappear even in zebrafish embryos, suggesting that another barrier to transplantation exists before the onset of adaptive immunity. Here, using a labelled macrophage zebrafish line, we demonstrated that engraftment of human HSC induces a massive recruitment of macrophages which rapidly phagocyte transplanted cells. Macrophages depletion, by chemical or pharmacological treatments, significantly improved the uptake and survival of transplanted cells, demonstrating the crucial implication of these innate immune cells for the successful engraftment of human cells in zebrafish. Beyond identifying the reasons for human hematopoietic cell engraftment failure, this work images the fate of human cells in real time over several days in macrophage-depleted zebrafish embryos.
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Affiliation(s)
- Reine El Omar
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
- Université de Lorraine, CITHEFOR, F-54505, Vandoeuvre Les Nancy, France
| | | | - Safiatou T Coulibaly
- University of Strasbourg, CNRS, Architecture et Réactivité de l'ARN, UPR 9002, Strasbourg, France
- ITI Innovec, Strasbourg, France
| | | | - François Lanza
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
| | - Christian Gachet
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
| | - Jean-Noel Freund
- ITI Innovec, Strasbourg, France
- University of Strasbourg, INSERM, IRFAC/UMR-S1113, Strasbourg, France
- INSERM, U1256 - NGERE, Université de Lorraine, 54500, Vandoeuvre-lès-Nancy, France
| | - Matteo Negroni
- University of Strasbourg, CNRS, Architecture et Réactivité de l'ARN, UPR 9002, Strasbourg, France
- ITI Innovec, Strasbourg, France
| | - Karima Kissa
- University of Montpellier, VBIC, INSERM U1047, Montpellier, France
- AZELEAD SAS, Montpellier, France
| | - Manuela Tavian
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France.
- ITI Innovec, Strasbourg, France.
- University of Strasbourg, INSERM, IRFAC/UMR-S1113, Strasbourg, France.
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2
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Tissot S, Guimard L, Meliani J, Boutry J, Dujon AM, Capp JP, Tökölyi J, Biro PA, Beckmann C, Fontenille L, Do Khoa N, Hamede R, Roche B, Ujvari B, Nedelcu AM, Thomas F. Author Correction: The impact of food availability on tumorigenesis is evolutionarily conserved. Sci Rep 2023; 13:22819. [PMID: 38129490 PMCID: PMC10739872 DOI: 10.1038/s41598-023-49920-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Affiliation(s)
- Sophie Tissot
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France.
| | - Lena Guimard
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Jordan Meliani
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Justine Boutry
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Antoine M Dujon
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Jean-Pascal Capp
- Toulouse Biotechnology Institute, University of Toulouse, INSA, CNRS, INRAE, Toulouse, France
| | - Jácint Tökölyi
- MTA-DE "Momentum" Ecology, Evolution and Developmental Biology Research Group, Department of Evolutionary Zoology, University of Debrecen, Debrecen, 4032, Hungary
| | - Peter A Biro
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Christa Beckmann
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
- School of Science, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Richmond, NSW, 2753, Australia
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Laura Fontenille
- AZELEAD, 377 Rue du Professeur Blayac, 34080, Montpellier, France
| | - Nam Do Khoa
- AZELEAD, 377 Rue du Professeur Blayac, 34080, Montpellier, France
| | - Rodrigo Hamede
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Benjamin Roche
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
- Departamento de Etología, Fauna Silvestre y Animales de Laboratorio, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Beata Ujvari
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Aurora M Nedelcu
- Department of Biology, University of New Brunswick, Fredericton, NB, Canada
| | - Frédéric Thomas
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
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3
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Tissot S, Guimard L, Meliani J, Boutry J, Dujon AM, Capp JP, Tökölyi J, Biro PA, Beckmann C, Fontenille L, Do Khoa N, Hamede R, Roche B, Ujvari B, Nedelcu AM, Thomas F. The impact of food availability on tumorigenesis is evolutionarily conserved. Sci Rep 2023; 13:19825. [PMID: 37963956 PMCID: PMC10645767 DOI: 10.1038/s41598-023-46896-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 11/07/2023] [Indexed: 11/16/2023] Open
Abstract
The inability to control cell proliferation results in the formation of tumors in many multicellular lineages. Nonetheless, little is known about the extent of conservation of the biological traits and ecological factors that promote or inhibit tumorigenesis across the metazoan tree. Particularly, changes in food availability have been linked to increased cancer incidence in humans, as an outcome of evolutionary mismatch. Here, we apply evolutionary oncology principles to test whether food availability, regardless of the multicellular lineage considered, has an impact on tumorigenesis. We used two phylogenetically unrelated model systems, the cnidarian Hydra oligactis and the fish Danio rerio, to investigate the impact of resource availability on tumor occurrence and progression. Individuals from healthy and tumor-prone lines were placed on four diets that differed in feeding frequency and quantity. For both models, frequent overfeeding favored tumor emergence, while lean diets appeared more protective. In terms of tumor progression, high food availability promoted it, whereas low resources controlled it, but without having a curative effect. We discuss our results in light of current ideas about the possible conservation of basic processes governing cancer in metazoans (including ancestral life history trade-offs at the cell level) and in the framework of evolutionary medicine.
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Affiliation(s)
- Sophie Tissot
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France.
| | - Lena Guimard
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Jordan Meliani
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Justine Boutry
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - Antoine M Dujon
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Jean-Pascal Capp
- Toulouse Biotechnology Institute, University of Toulouse, INSA, CNRS, INRAE, Toulouse, France
| | - Jácint Tökölyi
- MTA-DE "Momentum" Ecology, Evolution and Developmental Biology Research Group, Department of Evolutionary Zoology, University of Debrecen, Debrecen, 4032, Hungary
| | - Peter A Biro
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Christa Beckmann
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
- School of Science, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Richmond, NSW, 2753, Australia
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Laura Fontenille
- AZELEAD, 377 Rue du Professeur Blayac, 34080, Montpellier, France
| | - Nam Do Khoa
- AZELEAD, 377 Rue du Professeur Blayac, 34080, Montpellier, France
| | - Rodrigo Hamede
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Benjamin Roche
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
- Departamento de Etología, Fauna Silvestre y Animales de Laboratorio, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Beata Ujvari
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC, Australia
| | - Aurora M Nedelcu
- Department of Biology, University of New Brunswick, Fredericton, NB, Canada
| | - Frédéric Thomas
- CREEC/MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
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Marines J, Lorenzini F, Kissa K, Fontenille L. Modelling 3D Tumour Microenvironment In Vivo: A Tool to Predict Cancer Fate. Curr Issues Mol Biol 2023; 45:9076-9083. [PMID: 37998746 PMCID: PMC10670573 DOI: 10.3390/cimb45110569] [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: 10/19/2023] [Revised: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 11/25/2023] Open
Abstract
Recently, many studies demonstrated the fundamental role of the tumour microenvironment (TME) in cancer progression. Here, we describe a method to visualize in 3D the behaviour of tumours in zebrafish embryos. We highlight two major actors of the TME, macrophages and vessels. This valuable tool is transposable to Patient-Derived Xenograft imaging in order to predict the fate of malignant tumours according to the dynamics of their TME.
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Affiliation(s)
- Johanna Marines
- AZELEAD, 377 rue du Pr Blayac, 34080 Montpellier, France; (J.M.); (F.L.)
- Molecular Basis of Inflammation Laboratory, Institut de Génétique Humaine, CNRS, Université de Montpellier, 34090 Montpellier, France
| | | | - Karima Kissa
- VBIC, INSERM U1047, Université de Montpellier, 34090 Montpellier, France
| | - Laura Fontenille
- AZELEAD, 377 rue du Pr Blayac, 34080 Montpellier, France; (J.M.); (F.L.)
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5
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Taffoni C, Marines J, Chamma H, Guha S, Saccas M, Bouzid A, Valadao ALC, Maghe C, Jardine J, Park MK, Polak K, De Martino M, Vanpouille-Box C, Del Rio M, Gongora C, Gavard J, Bidère N, Song MS, Pineau D, Hugnot JP, Kissa K, Fontenille L, Blanchet FP, Vila IK, Laguette N. DNA damage repair kinase DNA-PK and cGAS synergize to induce cancer-related inflammation in glioblastoma. EMBO J 2022; 42:e111961. [PMID: 36574362 PMCID: PMC10068334 DOI: 10.15252/embj.2022111961] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/28/2022] Open
Abstract
Cytosolic DNA promotes inflammatory responses upon detection by the cyclic GMP-AMP (cGAMP) synthase (cGAS). It has been suggested that cGAS downregulation is an immune escape strategy harnessed by tumor cells. Here, we used glioblastoma cells that show undetectable cGAS levels to address if alternative DNA detection pathways can promote pro-inflammatory signaling. We show that the DNA-PK DNA repair complex (i) drives cGAS-independent IRF3-mediated type I Interferon responses and (ii) that its catalytic activity is required for cGAS-dependent cGAMP production and optimal downstream signaling. We further show that the cooperation between DNA-PK and cGAS favors the expression of chemokines that promote macrophage recruitment in the tumor microenvironment in a glioblastoma model, a process that impairs early tumorigenesis but correlates with poor outcome in glioblastoma patients. Thus, our study supports that cGAS-dependent signaling is acquired during tumorigenesis and that cGAS and DNA-PK activities should be analyzed concertedly to predict the impact of strategies aiming to boost tumor immunogenicity.
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Affiliation(s)
- Clara Taffoni
- IGH, Université de Montpellier, CNRS, Montpellier, France
| | - Johanna Marines
- IGH, Université de Montpellier, CNRS, Montpellier, France.,Azelead©, Montpellier, France
| | - Hanane Chamma
- IGH, Université de Montpellier, CNRS, Montpellier, France
| | | | | | - Amel Bouzid
- IGH, Université de Montpellier, CNRS, Montpellier, France
| | | | - Clément Maghe
- Team SOAP, CRCI2NA, Nantes Université, Inserm, CNRS, Université d'Angers, Nantes, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Jane Jardine
- Team SOAP, CRCI2NA, Nantes Université, Inserm, CNRS, Université d'Angers, Nantes, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Mi Kyung Park
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Mara De Martino
- Department of Radiation Oncology, Weill Cornell Medicine, New York, NY, USA
| | | | - Maguy Del Rio
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM, Université de Montpellier, ICM, Montpellier, France
| | - Celine Gongora
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM, Université de Montpellier, ICM, Montpellier, France
| | - Julie Gavard
- Team SOAP, CRCI2NA, Nantes Université, Inserm, CNRS, Université d'Angers, Nantes, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France.,Institut de Cancérologie de l'Ouest (ICO), Saint-Herblain, France
| | - Nicolas Bidère
- Team SOAP, CRCI2NA, Nantes Université, Inserm, CNRS, Université d'Angers, Nantes, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Min Sup Song
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Donovan Pineau
- Institut de Génomique Fonctionnelle (IGF), Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Jean-Philippe Hugnot
- Institut de Génomique Fonctionnelle (IGF), Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Karima Kissa
- Université de Montpellier, CNRS UMR 5235, Montpellier, France
| | | | - Fabien P Blanchet
- Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, CNRS, Montpellier, France
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6
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Dard L, Hubert C, Esteves P, Blanchard W, Bou About G, Baldasseroni L, Dumon E, Angelini C, Delourme M, Guyonnet-Duperat V, Claverol S, Bonneu M, Fontenille L, Kissa K, Séguéla PE, Thambo JB, Levy N, Herault Y, Bellance N, Dias Amoedo N, Magdinier F, Sorg T, Lacombe D, Rossignol R. HRAS germline mutations impair LKB1/AMPK signaling and mitochondrial homeostasis in Costello syndrome models. J Clin Invest 2022; 132:131053. [PMID: 35230976 PMCID: PMC9012293 DOI: 10.1172/jci131053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 06/13/2019] [Accepted: 02/23/2022] [Indexed: 11/17/2022] Open
Abstract
Germline mutations that activate genes in the canonical RAS/MAPK signaling pathway are responsible for rare human developmental disorders known as RASopathies. Here, we analyzed the molecular determinants of Costello syndrome (CS) using a mouse model expressing HRAS p.G12S, patient skin fibroblasts, hiPSC-derived human cardiomyocytes, a HRAS p.G12V zebrafish model and human fibroblasts expressing lentiviral constructs carrying HRAS p.G12S or HRAS p.G12A mutations. The findings revealed alteration of mitochondrial proteostasis and defective oxidative phosphorylation in the heart and skeletal muscle of Costello mice that were also found in the cell models of the disease. The underpinning mechanisms involved the inhibition of the AMPK signaling pathway by mutant forms of HRAS, leading to alteration of mitochondrial proteostasis and bioenergetics. Pharmacological activation of mitochondrial bioenergetics and quality control restored organelle function in HRAS p.G12A and p.G12S cell models, reduced left ventricle hypertrophy in the CS mice and diminished the occurrence of developmental defects in the CS zebrafish model. Collectively, these findings highlight the importance of mitochondrial proteostasis in the pathophysiology of RASopathies and suggest that patients with Costello syndrome may benefit from treatment with mitochondrial modulators.
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Affiliation(s)
| | | | | | | | - Ghina Bou About
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Illkirch, France
| | | | - Elodie Dumon
- INSERM U688, University of Bordeaux, Bordeaux, France
| | | | | | | | | | - Marc Bonneu
- Plateforme Proteome, University of Bordeaux, Bordeaux, France
| | | | | | | | | | - Nicolas Levy
- Marseille Medical Genetics, INSERM, Marseille, France
| | - Yann Herault
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Illkirch, France
| | | | | | | | - Tania Sorg
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Illkirch, France
| | - Didier Lacombe
- Medical Genetics Department, Bordeaux University Hospital CHU Bordeaux, INSERM U121, Bordeaux, France
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Boutry J, Mistral J, Berlioz L, Klimovich A, Tökölyi J, Fontenille L, Ujvari B, Dujon AM, Giraudeau M, Thomas F. Tumors (re)shape biotic interactions within ecosystems: Experimental evidence from the freshwater cnidarian Hydra. Sci Total Environ 2022; 803:149923. [PMID: 34487898 DOI: 10.1016/j.scitotenv.2021.149923] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 07/09/2021] [Revised: 08/22/2021] [Accepted: 08/22/2021] [Indexed: 05/25/2023]
Abstract
While it is often assumed that oncogenic processes in metazoans can influence species interactions, empirical evidence is lacking. Here, we use the cnidarian Hydra oligactis to experimentally explore the consequences of tumor associated phenotypic alterations for its predation ability, relationship with commensal ciliates and vulnerability to predators. Unexpectedly, hydra's predation ability was higher in tumorous polyps compared to non-tumorous ones. Commensal ciliates colonized preferentially tumorous hydras than non-tumorous ones, and had a higher replication rate on the former. Finally, in a choice experiment, tumorous hydras were preferentially eaten by a fish predator. This study, for the first time, provides evidence that neoplastic growth has the potential, through effect(s) on host phenotype, to alter biotic interactions within ecosystems and should thus be taken into account by ecologists.
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Affiliation(s)
- Justine Boutry
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France.
| | - Juliette Mistral
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
| | - Laurent Berlioz
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
| | | | - Jácint Tökölyi
- MTA-DE Behavioural Ecology Research Group, Department of Evolutionary Zoology, University of Debrecen, 4032 Debrecen, Hungary
| | - Laura Fontenille
- AZELEAD, 377 Rue du Professeur Blayac, 34080 Montpellier, France
| | - Beata Ujvari
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria, Australia
| | - Antoine M Dujon
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria, Australia
| | - Mathieu Giraudeau
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; LIENSs, UMR 7266 CNRS-La Rochelle Université, 2 Rue Olympe de Gouges, 17000 La Rochelle, France
| | - Frédéric Thomas
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
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8
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Fontenille L, Rouquier S, Lutfalla G, Giorgi D. Microtubule-associated protein 9 (Map9/Asap) is required for the early steps of zebrafish development. Cell Cycle 2014; 13:1101-14. [PMID: 24553125 PMCID: PMC4013161 DOI: 10.4161/cc.27944] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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] [Indexed: 11/19/2022] Open
Abstract
Microtubules are structural components of the cell cytoskeleton and key factors for mitosis and ciliogenesis in eukaryotes. The regulation of MT dynamics requires non-motor MAPs. We previously showed that, in human cells in culture, MAP9 (also named ASAP) is involved in MT dynamics and is essential for mitotic spindle formation and mitosis progression. Indeed, misexpression of MAP9 leads to severe mitotic defects and cell death. Here, we investigated the in vivo role of map9 during zebrafish development. Map9 is expressed mainly as a maternal gene. Within cells, Map9 is associated with the MT network of the mitotic spindle and with centrosomes. Morpholino-mediated depletion of map9 leads to early development arrest before completion of epiboly. Map9 localizes to the MT array of the YSL. This MT network is destroyed in Map9-depleted embryos, and injection of anti-map9 morpholinos directly in the nascent YSL leads to arrest of epiboly/gastrulation. Finally, map9 knockdown deregulates the expression of genes involved in endodermal differentiation, dorso-ventral and left-right patterning, and other MT-based functions. At low morpholino doses, the surviving embryos show dramatic developmental defects, spindle and mitotic defects, and increased apoptosis. Our findings suggest that map9 is a crucial factor in early zebrafish development by regulating different MT-based processes.
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Affiliation(s)
- Laura Fontenille
- Institute of Human Genetics; UPR 1142; CNRS; Montpellier, France; Université de Montpellier 1; Montpellier, France
| | - Sylvie Rouquier
- Institute of Human Genetics; UPR 1142; CNRS; Montpellier, France
| | - Georges Lutfalla
- Dynamique des Interactions Membranaires Normales et Pathologiques; UMR 5235; CNRS; Universités de Montpellier 1&2; Montpellier, France
| | - Dominique Giorgi
- Institute of Human Genetics; UPR 1142; CNRS; Montpellier, France
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