1
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Duarte P, Brattig Correia R, Nóvoa A, Mallo M. Regulatory changes associated with the head to trunk developmental transition. BMC Biol 2023; 21:170. [PMID: 37553620 PMCID: PMC10408190 DOI: 10.1186/s12915-023-01675-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 08/03/2023] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Development of vertebrate embryos is characterized by early formation of the anterior tissues followed by the sequential extension of the axis at their posterior end to build the trunk and tail structures, first by the activity of the primitive streak and then of the tail bud. Embryological, molecular and genetic data indicate that head and trunk development are significantly different, suggesting that the transition into the trunk formation stage involves major changes in regulatory gene networks. RESULTS We explored those regulatory changes by generating differential interaction networks and chromatin accessibility profiles from the posterior epiblast region of mouse embryos at embryonic day (E)7.5 and E8.5. We observed changes in various cell processes, including several signaling pathways, ubiquitination machinery, ion dynamics and metabolic processes involving lipids that could contribute to the functional switch in the progenitor region of the embryo. We further explored the functional impact of changes observed in Wnt signaling associated processes, revealing a switch in the functional relevance of Wnt molecule palmitoleoylation, essential during gastrulation but becoming differentially required for the control of axial extension and progenitor differentiation processes during trunk formation. We also found substantial changes in chromatin accessibility at the two developmental stages, mostly mapping to intergenic regions and presenting differential footprinting profiles to several key transcription factors, indicating a significant switch in the regulatory elements controlling head or trunk development. Those chromatin changes are largely independent of retinoic acid, despite the key role of this factor in the transition to trunk development. We also tested the functional relevance of potential enhancers identified in the accessibility assays that reproduced the expression profiles of genes involved in the transition. Deletion of these regions by genome editing had limited effect on the expression of those genes, suggesting the existence of redundant enhancers that guarantee robust expression patterns. CONCLUSIONS This work provides a global view of the regulatory changes controlling the switch into the axial extension phase of vertebrate embryonic development. It also revealed mechanisms by which the cellular context influences the activity of regulatory factors, channeling them to implement one of several possible biological outputs.
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Affiliation(s)
- Patrícia Duarte
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156, Oeiras, Portugal
| | - Rion Brattig Correia
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156, Oeiras, Portugal
| | - Ana Nóvoa
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156, Oeiras, Portugal
| | - Moisés Mallo
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156, Oeiras, Portugal.
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2
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Petrillo S, De Giorgio F, Bertino F, Garello F, Bitonto V, Longo DL, Mercurio S, Ammirata G, Allocco AL, Fiorito V, Chiabrando D, Altruda F, Terreno E, Provero P, Munaron L, Genova T, Nóvoa A, Carlos AR, Cardoso S, Mallo M, Soares MP, Tolosano E. Endothelial cells require functional FLVCR1a during developmental and adult angiogenesis. Angiogenesis 2023; 26:365-384. [PMID: 36631598 PMCID: PMC10328904 DOI: 10.1007/s10456-023-09865-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/06/2023] [Indexed: 01/13/2023]
Abstract
The Feline Leukemia Virus Subgroup C Receptor 1a (FLVCR1a) is a transmembrane heme exporter essential for embryonic vascular development. However, the exact role of FLVCR1a during blood vessel development remains largely undefined. Here, we show that FLVCR1a is highly expressed in angiogenic endothelial cells (ECs) compared to quiescent ECs. Consistently, ECs lacking FLVCR1a give rise to structurally and functionally abnormal vascular networks in multiple models of developmental and pathologic angiogenesis. Firstly, zebrafish embryos without FLVCR1a displayed defective intersegmental vessels formation. Furthermore, endothelial-specific Flvcr1a targeting in mice led to a reduced radial expansion of the retinal vasculature associated to decreased EC proliferation. Moreover, Flvcr1a null retinas showed defective vascular organization and loose attachment of pericytes. Finally, adult neo-angiogenesis is severely affected in murine models of tumor angiogenesis. Tumor blood vessels lacking Flvcr1a were disorganized and dysfunctional. Collectively, our results demonstrate the critical role of FLVCR1a as a regulator of developmental and pathological angiogenesis identifying FLVCR1a as a potential therapeutic target in human diseases characterized by aberrant neovascularization.
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Affiliation(s)
- Sara Petrillo
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy.
| | - F De Giorgio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - F Bertino
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - F Garello
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - V Bitonto
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - D L Longo
- Institute of Biostructures and Bioimaging (IBB), Italian National Research Council (CNR), Via Nizza, 52, 10126, Turin, Italy
| | - S Mercurio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - G Ammirata
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - A L Allocco
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - V Fiorito
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - D Chiabrando
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - F Altruda
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - E Terreno
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
| | - P Provero
- Department of Molecular Biotechnology and Health Sciences, and GenoBiToUS, Genomics and Bioinformatics Service, University of Torino, Turin, Italy
- Center for Translational Genomics and Bioinformatics, San Raffaele Scientific Institute IRCCS, Milan, Italy
| | - L Munaron
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123, Turin, Italy
| | - T Genova
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123, Turin, Italy
| | - A Nóvoa
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - A R Carlos
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - S Cardoso
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - M Mallo
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - M P Soares
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - E Tolosano
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center (MBC) "Guido Tarone", University of Torino, Via Nizza, 52, 10126, Turin, Italy
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3
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Lagler DK, Hannemann E, Eck K, Klawatsch J, Seichter D, Russ I, Mendel C, Lühken G, Krebs S, Blum H, Upadhyay M, Medugorac I. Fine-mapping and identification of candidate causal genes for tail length in the Merinolandschaf breed. Commun Biol 2022; 5:918. [PMID: 36068271 PMCID: PMC9448734 DOI: 10.1038/s42003-022-03854-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/16/2022] [Indexed: 12/14/2022] Open
Abstract
Docking the tails of lambs in long-tailed sheep breeds is a common practice worldwide. But this practice is associated with pain. Breeding for a shorter tail could offer an alternative. Therefore, this study aimed to analyze the natural tail length variation in the Merinolandschaf and to identify causal alleles for the short tail phenotype segregating within long-tailed breeds. We used SNP-based association analysis and haplotype-based mapping in 362 genotyped (Illumina OvineSNP50) and phenotyped Merinolandschaf lambs. Genome-wide significant regions were capture sequenced in 48 lambs and comparatively analyzed in various long and short-tailed sheep breeds and wild sheep subspecies. Here we show a SNP located in the first exon of HOXB13 and a SINE element located in the promotor of HOXB13 as promising candidates. These results enable more precise breeding towards shorter tails, improve animal welfare by amplification of ancestral alleles and contribute to a better understanding of differential embryonic development. Using SNP-association analysis and genetic mapping, a SNP and an insertion in and close to HOXB13 associated with short tail length is identified in Merino sheep, which may be a target for safely selecting shorter tails and improving sheep welfare.
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Affiliation(s)
- Dominik Karl Lagler
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany.,Tierzuchtforschung e.V. München, Senator-Gerauer-Str. 23, 85586, Poing, Germany
| | - Elisabeth Hannemann
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany
| | - Kim Eck
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany.,Tierzuchtforschung e.V. München, Senator-Gerauer-Str. 23, 85586, Poing, Germany
| | - Jürgen Klawatsch
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany.,Tierzuchtforschung e.V. München, Senator-Gerauer-Str. 23, 85586, Poing, Germany
| | - Doris Seichter
- Tierzuchtforschung e.V. München, Senator-Gerauer-Str. 23, 85586, Poing, Germany
| | - Ingolf Russ
- Tierzuchtforschung e.V. München, Senator-Gerauer-Str. 23, 85586, Poing, Germany
| | - Christian Mendel
- Institute for Animal Breeding, Bavarian State Research Center for Agriculture, Prof.-Dürrwaechter-Platz 1, 85586, Poing, Germany
| | - Gesine Lühken
- Institute of Animal Breeding and Genetics, JLU Gießen, Ludwigstr. 21, 35390, Gießen, Germany
| | - Stefan Krebs
- Laboratory for Functional Genome Analysis, Gene Center, Ludwig-Maximilians-University Munich, 80539, Munich, Germany
| | - Helmut Blum
- Laboratory for Functional Genome Analysis, Gene Center, Ludwig-Maximilians-University Munich, 80539, Munich, Germany
| | - Maulik Upadhyay
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany
| | - Ivica Medugorac
- Population Genomics Group, Department of Veterinary Sciences, LMU Munich, Lena-Christ-Str. 48, 82152, Martinsried, Germany.
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4
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Robles-Valero J, Fernández-Nevado L, Cuadrado M, Lorenzo-Martín LF, Fernández-Pisonero I, Abad A, Redín E, Montuenga L, Martín-Zanca D, Bigas A, Mallo M, Dosil M, Bustelo XR. Characterization of the spectrum of trivalent VAV1-mutation-driven tumors using a gene-edited mouse model. Mol Oncol 2022; 16:3533-3553. [PMID: 35895495 PMCID: PMC9533688 DOI: 10.1002/1878-0261.13295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 07/07/2022] [Accepted: 07/26/2022] [Indexed: 11/28/2022] Open
Abstract
Mutations in the VAV1 guanine nucleotide exchange factor 1 have been recently found in peripheral T cell lymphoma and nonsmall‐cell lung cancer (NSCLC). To understand their pathogenic potential, we generated a gene‐edited mouse model that expresses a VAV1 mutant protein that recapitulates the signalling alterations present in the VAV1 mutant subclass most frequently found in tumours. We could not detect any overt tumourigenic process in those mice. However, the concurrent elimination of the Trp53 tumour suppressor gene in them drives T cell lymphomagenesis. This process represents an exacerbation of the normal functions that wild‐type VAV1 plays in follicular helper T cells. We also found that, in combination with the Kras oncogene, the VAV1 mutant version favours progression of NSCLC. These data indicate that VAV1 mutations play critical, although highly cell‐type‐specific, roles in tumourigenesis. They also indicate that such functions are contingent on the mutational landscape of the tumours involved.
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Affiliation(s)
- Javier Robles-Valero
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Lucía Fernández-Nevado
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Myriam Cuadrado
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - L Francisco Lorenzo-Martín
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Isabel Fernández-Pisonero
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Antonio Abad
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Esther Redín
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain.,Solid Tumors Program, Center of Applied Medical Research, University of Navarra, 31008, Pamplona, Spain
| | - Luis Montuenga
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain.,Solid Tumors Program, Center of Applied Medical Research, University of Navarra, 31008, Pamplona, Spain
| | - Dionisio Martín-Zanca
- Instituto de Biología Funcional y Genómica, CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Anna Bigas
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain.,Institut Hospital del Mar d'Investigacions Médiques, 08003, Barcelona, Spain
| | - Moisés Mallo
- Gulbenkian Institute, 2780-156, Oeiras, Portugal
| | - Mercedes Dosil
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
| | - Xosé R Bustelo
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca, 37007, Salamanca, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), CSIC-University of Salamanca, 37007, Salamanca, Spain
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5
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Diaz-Cuadros M, Pourquié O, El-Sherif E. Patterning with clocks and genetic cascades: Segmentation and regionalization of vertebrate versus insect body plans. PLoS Genet 2021; 17:e1009812. [PMID: 34648490 PMCID: PMC8516289 DOI: 10.1371/journal.pgen.1009812] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Oscillatory and sequential processes have been implicated in the spatial patterning of many embryonic tissues. For example, molecular clocks delimit segmental boundaries in vertebrates and insects and mediate lateral root formation in plants, whereas sequential gene activities are involved in the specification of regional identities of insect neuroblasts, vertebrate neural tube, vertebrate limb, and insect and vertebrate body axes. These processes take place in various tissues and organisms, and, hence, raise the question of what common themes and strategies they share. In this article, we review 2 processes that rely on the spatial regulation of periodic and sequential gene activities: segmentation and regionalization of the anterior-posterior (AP) axis of animal body plans. We study these processes in species that belong to 2 different phyla: vertebrates and insects. By contrasting 2 different processes (segmentation and regionalization) in species that belong to 2 distantly related phyla (arthropods and vertebrates), we elucidate the deep logic of patterning by oscillatory and sequential gene activities. Furthermore, in some of these organisms (e.g., the fruit fly Drosophila), a mode of AP patterning has evolved that seems not to overtly rely on oscillations or sequential gene activities, providing an opportunity to study the evolution of pattern formation mechanisms.
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Affiliation(s)
- Margarete Diaz-Cuadros
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Olivier Pourquié
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, United States of America
| | - Ezzat El-Sherif
- Division of Developmental Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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6
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Paiva RS, Ramos CV, Azenha SR, Alves C, Basto AP, Graca L, Martins VC. Peptidylprolyl isomerase C (Ppic) regulates invariant Natural Killer T cell (iNKT) differentiation in mice. Eur J Immunol 2021; 51:1968-1979. [PMID: 33864384 PMCID: PMC8453708 DOI: 10.1002/eji.202048924] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 03/18/2021] [Accepted: 04/13/2021] [Indexed: 12/25/2022]
Abstract
Peptidyl‐prolyl cis‐trans isomerase C (Ppic) is expressed in several bone marrow (BM) hematopoietic progenitors and in T‐cell precursors. Since the expression profile of Ppic in the hematoimmune system was suggestive that it could play a role in hematopoiesis and/or T lymphocyte differentiation, we sought to test that hypothesis in vivo. Specifically, we generated a Ppic‐deficient mouse model by targeting the endogenous locus by CRISPR/Cas9 and tested the requirement of Ppic in hematopoiesis. Several immune cell lineages covering BM progenitors, lymphocyte precursors, as well as mature cells at the periphery were analyzed. While most lineages were unaffected, invariant NKT (iNKT) cells were reduced in percentage and absolute cell numbers in the Ppic‐deficient thymus. This affected the most mature stages in the thymus, S2 and S3, and the phenotype was maintained at the periphery. Additionally, immature transitional T1 and T2 B lymphocytes were increased in the Ppic‐deficient spleen, but the phenotype was lost in mature B lymphocytes. In sum, our data show that Ppic is dispensable for myeloid cells, platelets, erythrocytes, αβ, and γδ T lymphocytes in vivo in the steady state, while being involved in B‐ and iNKT cell differentiation.
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Affiliation(s)
- Ricardo S Paiva
- Lymphocyte Development and Leukemogenesis Laboratory, Instituto Gulbenkian de Ciência, Calouste Gulbenkian Foundation, Oeiras, Portugal
| | - Camila V Ramos
- Lymphocyte Development and Leukemogenesis Laboratory, Instituto Gulbenkian de Ciência, Calouste Gulbenkian Foundation, Oeiras, Portugal
| | - Sara R Azenha
- Lymphocyte Development and Leukemogenesis Laboratory, Instituto Gulbenkian de Ciência, Calouste Gulbenkian Foundation, Oeiras, Portugal
| | - Carolina Alves
- Lymphocyte Development and Leukemogenesis Laboratory, Instituto Gulbenkian de Ciência, Calouste Gulbenkian Foundation, Oeiras, Portugal
| | - Afonso P Basto
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Luis Graca
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Vera C Martins
- Lymphocyte Development and Leukemogenesis Laboratory, Instituto Gulbenkian de Ciência, Calouste Gulbenkian Foundation, Oeiras, Portugal
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7
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Navas-Pérez E, Vicente-García C, Mirra S, Burguera D, Fernàndez-Castillo N, Ferrán JL, López-Mayorga M, Alaiz-Noya M, Suárez-Pereira I, Antón-Galindo E, Ulloa F, Herrera-Úbeda C, Cuscó P, Falcón-Moya R, Rodríguez-Moreno A, D'Aniello S, Cormand B, Marfany G, Soriano E, Carrión ÁM, Carvajal JJ, Garcia-Fernàndez J. Characterization of an eutherian gene cluster generated after transposon domestication identifies Bex3 as relevant for advanced neurological functions. Genome Biol 2020; 21:267. [PMID: 33100228 PMCID: PMC7586669 DOI: 10.1186/s13059-020-02172-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND One of the most unusual sources of phylogenetically restricted genes is the molecular domestication of transposable elements into a host genome as functional genes. Although these kinds of events are sometimes at the core of key macroevolutionary changes, their origin and organismal function are generally poorly understood. RESULTS Here, we identify several previously unreported transposable element domestication events in the human and mouse genomes. Among them, we find a remarkable molecular domestication that gave rise to a multigenic family in placental mammals, the Bex/Tceal gene cluster. These genes, which act as hub proteins within diverse signaling pathways, have been associated with neurological features of human patients carrying genomic microdeletions in chromosome X. The Bex/Tceal genes display neural-enriched patterns and are differentially expressed in human neurological disorders, such as autism and schizophrenia. Two different murine alleles of the cluster member Bex3 display morphological and physiopathological brain modifications, such as reduced interneuron number and hippocampal electrophysiological imbalance, alterations that translate into distinct behavioral phenotypes. CONCLUSIONS We provide an in-depth understanding of the emergence of a gene cluster that originated by transposon domestication and gene duplication at the origin of placental mammals, an evolutionary process that transformed a non-functional transposon sequence into novel components of the eutherian genome. These genes were integrated into existing signaling pathways involved in the development, maintenance, and function of the CNS in eutherians. At least one of its members, Bex3, is relevant for higher brain functions in placental mammals and may be involved in human neurological disorders.
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Affiliation(s)
- Enrique Navas-Pérez
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain
| | - Cristina Vicente-García
- Centro Andaluz de Biología del Desarrollo, CSIC-UPO-JA, Universidad Pablo de Olavide, 41013, Sevilla, Spain
| | - Serena Mirra
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, and Institute of Neurosciences, University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III (ISCIII), 28029, Madrid, Spain
| | - Demian Burguera
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.,Department of Zoology, Charles University, Vinicna 7, 12844, Prague, Czech Republic
| | - Noèlia Fernàndez-Castillo
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Institut de Recerca Sant Joan de Déu (IR-SJD), Esplugues de Llobregat, 08950, Barcelona, Spain
| | - José Luis Ferrán
- Department of Human Anatomy, School of Medicine, University of Murcia and IMIB-Arrixaca Institute, 30120, Murcia, Spain
| | - Macarena López-Mayorga
- Centro Andaluz de Biología del Desarrollo, CSIC-UPO-JA, Universidad Pablo de Olavide, 41013, Sevilla, Spain
| | - Marta Alaiz-Noya
- Department of Physiology, Anatomy and Cell Biology, Universidad Pablo de Olavide, 41013, Sevilla, Spain.,Present Address: Instituto de Neurociencias de Alicante (Universidad Miguel Hernández - Consejo Superior de Investigaciones Científicas), Alicante, Spain
| | - Irene Suárez-Pereira
- Department of Physiology, Anatomy and Cell Biology, Universidad Pablo de Olavide, 41013, Sevilla, Spain.,Present Address: Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Neuropsychopharmacology and psychobiology research group, UCA, INiBICA, Cádiz, Spain
| | - Ester Antón-Galindo
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain
| | - Fausto Ulloa
- Department of Cell Biology, Physiology and Immunology, and Institute of Neurosciences, University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III (ISCIII), 28029, Madrid, Spain
| | - Carlos Herrera-Úbeda
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain
| | - Pol Cuscó
- Genome Architecture, Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG), the Barcelona Institute of Science and Technology, 08003, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), 08003, Barcelona, Spain
| | - Rafael Falcón-Moya
- Department of Physiology, Anatomy and Cell Biology, Universidad Pablo de Olavide, 41013, Sevilla, Spain
| | - Antonio Rodríguez-Moreno
- Department of Physiology, Anatomy and Cell Biology, Universidad Pablo de Olavide, 41013, Sevilla, Spain
| | - Salvatore D'Aniello
- Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, 80121, Naples, Italy
| | - Bru Cormand
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Institut de Recerca Sant Joan de Déu (IR-SJD), Esplugues de Llobregat, 08950, Barcelona, Spain
| | - Gemma Marfany
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Institut de Recerca Sant Joan de Déu (IR-SJD), Esplugues de Llobregat, 08950, Barcelona, Spain
| | - Eduardo Soriano
- Department of Cell Biology, Physiology and Immunology, and Institute of Neurosciences, University of Barcelona, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III (ISCIII), 28029, Madrid, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010, Barcelona, Spain
| | - Ángel M Carrión
- Department of Physiology, Anatomy and Cell Biology, Universidad Pablo de Olavide, 41013, Sevilla, Spain
| | - Jaime J Carvajal
- Centro Andaluz de Biología del Desarrollo, CSIC-UPO-JA, Universidad Pablo de Olavide, 41013, Sevilla, Spain.
| | - Jordi Garcia-Fernàndez
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, and Institut de Biomedicina (IBUB), University of Barcelona, 08028, Barcelona, Spain.
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8
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Dias A, Lozovska A, Wymeersch FJ, Nóvoa A, Binagui-Casas A, Sobral D, Martins GG, Wilson V, Mallo M. A Tgfbr1/Snai1-dependent developmental module at the core of vertebrate axial elongation. eLife 2020; 9:56615. [PMID: 32597756 PMCID: PMC7324159 DOI: 10.7554/elife.56615] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 06/18/2020] [Indexed: 12/17/2022] Open
Abstract
Formation of the vertebrate postcranial body axis follows two sequential but distinct phases. The first phase generates pre-sacral structures (the so-called primary body) through the activity of the primitive streak on axial progenitors within the epiblast. The embryo then switches to generate the secondary body (post-sacral structures), which depends on axial progenitors in the tail bud. Here we show that the mammalian tail bud is generated through an independent functional developmental module, concurrent but functionally different from that generating the primary body. This module is triggered by convergent Tgfbr1 and Snai1 activities that promote an incomplete epithelial to mesenchymal transition on a subset of epiblast axial progenitors. This EMT is functionally different from that coordinated by the primitive streak, as it does not lead to mesodermal differentiation but brings axial progenitors into a transitory state, keeping their progenitor activity to drive further axial body extension.
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Affiliation(s)
- André Dias
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | | | - Filip J Wymeersch
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh, United Kingdom
| | - Ana Nóvoa
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Anahi Binagui-Casas
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Gabriel G Martins
- Instituto Gulbenkian de Ciência, Oeiras, Portugal.,Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
| | - Valerie Wilson
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh, United Kingdom
| | - Moises Mallo
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
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9
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Mallo M. The vertebrate tail: a gene playground for evolution. Cell Mol Life Sci 2020; 77:1021-1030. [PMID: 31559446 PMCID: PMC11104866 DOI: 10.1007/s00018-019-03311-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 12/25/2022]
Abstract
The tail of all vertebrates, regardless of size and anatomical detail, derive from a post-anal extension of the embryo known as the tail bud. Formation, growth and differentiation of this structure are closely associated with the activity of a group of cells that derive from the axial progenitors that build the spinal cord and the muscle-skeletal case of the trunk. Gdf11 activity switches the development of these progenitors from a trunk to a tail bud mode by changing the regulatory network that controls their growth and differentiation potential. Recent work in the mouse indicates that the tail bud regulatory network relies on the interconnected activities of the Lin28/let-7 axis and the Hox13 genes. As this network is likely to be conserved in other mammals, it is possible that the final length and anatomical composition of the adult tail result from the balance between the progenitor-promoting and -repressing activities provided by those genes. This balance might also determine the functional characteristics of the adult tail. Particularly relevant is its regeneration potential, intimately linked to the spinal cord. In mammals, known for their complete inability to regenerate the tail, the spinal cord is removed from the embryonic tail at late stages of development through a Hox13-dependent mechanism. In contrast, the tail of salamanders and lizards keep a functional spinal cord that actively guides the tail's regeneration process. I will argue that the distinct molecular networks controlling tail bud development provided a collection of readily accessible gene networks that were co-opted and combined during evolution either to end the active life of those progenitors or to make them generate the wide diversity of tail shapes and sizes observed among vertebrates.
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Affiliation(s)
- Moisés Mallo
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156, Oeiras, Portugal.
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10
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Badenes M, Amin A, González-García I, Félix I, Burbridge E, Cavadas M, Ortega FJ, de Carvalho É, Faísca P, Carobbio S, Seixas E, Pedroso D, Neves-Costa A, Moita LF, Fernández-Real JM, Vidal-Puig A, Domingos A, López M, Adrain C. Deletion of iRhom2 protects against diet-induced obesity by increasing thermogenesis. Mol Metab 2019; 31:67-84. [PMID: 31918923 PMCID: PMC6909339 DOI: 10.1016/j.molmet.2019.10.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/12/2019] [Accepted: 10/24/2019] [Indexed: 12/27/2022] Open
Abstract
Objective Obesity is the result of positive energy balance. It can be caused by excessive energy consumption but also by decreased energy dissipation, which occurs under several conditions including when the development or activation of brown adipose tissue (BAT) is impaired. Here we evaluated whether iRhom2, the essential cofactor for the Tumour Necrosis Factor (TNF) sheddase ADAM17/TACE, plays a role in the pathophysiology of metabolic syndrome. Methods We challenged WT versus iRhom2 KO mice to positive energy balance by chronic exposure to a high fat diet and then compared their metabolic phenotypes. We also carried out ex vivo assays with primary and immortalized mouse brown adipocytes to establish the autonomy of the effect of loss of iRhom2 on thermogenesis and respiration. Results Deletion of iRhom2 protected mice from weight gain, dyslipidemia, adipose tissue inflammation, and hepatic steatosis and improved insulin sensitivity when challenged by a high fat diet. Crucially, the loss of iRhom2 promotes thermogenesis via BAT activation and beige adipocyte recruitment, enabling iRhom2 KO mice to dissipate excess energy more efficiently than WT animals. This effect on enhanced thermogenesis is cell-autonomous in brown adipocytes as iRhom2 KOs exhibit elevated UCP1 levels and increased mitochondrial proton leak. Conclusion Our data suggest that iRhom2 is a negative regulator of thermogenesis and plays a role in the control of adipose tissue homeostasis during metabolic disease. Deletion of iRhom2 protects mice from metabolic syndrome. In obesity, iRhom2 deletion increases energy expenditure, thermogenesis and white adipose tissue beiging. iRhom2 deletion enhances thermogenesis in naïve brown adipocytes.
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Affiliation(s)
| | - Abdulbasit Amin
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal; Department of Physiology, Faculty of Basic Medical Sciences, University of Ilorin, Nigeria
| | - Ismael González-García
- NeurObesity Group, Department of Physiology, CiMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Inês Félix
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal; Institute of Biomedicine, University of Turku, Turku, FI-20520, Finland; Turku Bioscience Centre, University of Turku, Åbo Akademi University, FI-20520 Turku, Finland
| | | | | | | | | | - Pedro Faísca
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal
| | - Stefania Carobbio
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, UK
| | - Elsa Seixas
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal
| | - Dora Pedroso
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal
| | | | - Luís F Moita
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal; Instituto de Histologia e Biologia do Desenvolvimento, Faculdade de Medicina, Universidade de Lisboa, Portugal
| | | | - António Vidal-Puig
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, UK
| | - Ana Domingos
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal; Obesity Lab, Department of Physiology, Anatomy and Genetics, University of Oxford, UK
| | - Miguel López
- NeurObesity Group, Department of Physiology, CiMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Colin Adrain
- Instituto Gulbenkian de Ciência (IGC), Oeiras, Portugal; Centre for Cancer Research and Cell Biology, Queen's University Belfast, UK.
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11
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Aires R, de Lemos L, Nóvoa A, Jurberg AD, Mascrez B, Duboule D, Mallo M. Tail Bud Progenitor Activity Relies on a Network Comprising Gdf11, Lin28, and Hox13 Genes. Dev Cell 2019; 48:383-395.e8. [DOI: 10.1016/j.devcel.2018.12.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/18/2018] [Accepted: 12/12/2018] [Indexed: 12/31/2022]
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12
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Aires R, Dias A, Mallo M. Deconstructing the molecular mechanisms shaping the vertebrate body plan. Curr Opin Cell Biol 2018; 55:81-86. [DOI: 10.1016/j.ceb.2018.05.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/08/2018] [Accepted: 05/14/2018] [Indexed: 11/28/2022]
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13
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Oikonomidi I, Burbridge E, Cavadas M, Sullivan G, Collis B, Naegele H, Clancy D, Brezinova J, Hu T, Bileck A, Gerner C, Bolado A, von Kriegsheim A, Martin SJ, Steinberg F, Strisovsky K, Adrain C. iTAP, a novel iRhom interactor, controls TNF secretion by policing the stability of iRhom/TACE. eLife 2018; 7:35032. [PMID: 29897333 PMCID: PMC6042963 DOI: 10.7554/elife.35032] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 06/10/2018] [Indexed: 12/11/2022] Open
Abstract
The apical inflammatory cytokine TNF regulates numerous important biological processes including inflammation and cell death, and drives inflammatory diseases. TNF secretion requires TACE (also called ADAM17), which cleaves TNF from its transmembrane tether. The trafficking of TACE to the cell surface, and stimulation of its proteolytic activity, depends on membrane proteins, called iRhoms. To delineate how the TNF/TACE/iRhom axis is regulated, we performed an immunoprecipitation/mass spectrometry screen to identify iRhom-binding proteins. This identified a novel protein, that we name iTAP (iRhom Tail-Associated Protein) that binds to iRhoms, enhancing the cell surface stability of iRhoms and TACE, preventing their degradation in lysosomes. Depleting iTAP in primary human macrophages profoundly impaired TNF production and tissues from iTAP KO mice exhibit a pronounced depletion in active TACE levels. Our work identifies iTAP as a physiological regulator of TNF signalling and a novel target for the control of inflammation. Inflammation forms part of the body's defense system against pathogens, but if the system becomes faulty, it can cause problems linked to inflammatory and autoimmune diseases. Immune cells coordinate their activity using specific signaling molecules called cytokines. For example, the cytokine TNF is an important trigger of inflammation and is produced at the surface of immune cells. A specific enzyme called TACE is needed to release TNF, as well as other signaling molecules, including proteins that trigger healing. Previous work revealed that TACE works with proteins called iRhoms, which regulate its activity and help TACE to reach the surface of the cell to release TNF. To find out how, Oikonomidi et al. screened human cells to see what other proteins interact with iRhoms. The results revealed a new protein named iTAP, which is required to release TNF from the surface of cells. It also protects the TACE-iRhom complex from being destroyed by the cell’s waste disposal system. When iTAP was experimentally removed in human immune cells, the cells were unable to release TNF. Instead, iRhom and TACE travelled to the cell's garbage system, the lysosome, where the proteins were destroyed. Removing the iTAP gene in mice had the same effect, and the TACE-iRhom complex was no longer found on the surface of the cell, but instead degraded in lysosomes. This suggests that in healthy cells, the iTAP protein prevents the cell from destroying this protein complex. TNF controls many beneficial processes, including fighting infection and cancer. However, when the immune system releases too many cytokines, it can lead to inflammatory diseases or even cause cancer. Specific drugs that target TNF are not always effective administered on their own, and sometimes, patients stop responding to the drugs. Since the new protein iTAP works as a switch to turn TNF release on or off, it could provide a target for the development of new treatments.
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Affiliation(s)
- Ioanna Oikonomidi
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Emma Burbridge
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Miguel Cavadas
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Graeme Sullivan
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Blanka Collis
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Heike Naegele
- Center for Biological Systems Analysis, Faculty of Biology, Albert Ludwigs Universitaet Freiburg, Freiburg, Germany
| | - Danielle Clancy
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Jana Brezinova
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Tianyi Hu
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Andrea Bileck
- Institut für Analytische Chemie, Universität Wien, Vienna, Austria
| | | | - Alfonso Bolado
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alex von Kriegsheim
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Seamus J Martin
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Florian Steinberg
- Center for Biological Systems Analysis, Faculty of Biology, Albert Ludwigs Universitaet Freiburg, Freiburg, Germany
| | - Kvido Strisovsky
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Colin Adrain
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
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