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Meriaux C, Arafah K, Tasiemski A, Wisztorski M, Bruand J, Boidin-Wichlacz C, Desmons A, Debois D, Laprévote O, Brunelle A, Gaasterland T, Macagno E, Fournier I, Salzet M. Multiple changes in peptide and lipid expression associated with regeneration in the nervous system of the medicinal leech. PLoS One 2011; 6:e18359. [PMID: 21526169 PMCID: PMC3081291 DOI: 10.1371/journal.pone.0018359] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 02/28/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The adult medicinal leech central nervous system (CNS) is capable of regenerating specific synaptic circuitry after a mechanical lesion, displaying evidence of anatomical repair within a few days and functional recovery within a few weeks. In the present work, spatiotemporal changes in molecular distributions during this phenomenon are explored. Moreover, the hypothesis that neural regeneration involves some molecular factors initially employed during embryonic neural development is tested. RESULTS Imaging mass spectrometry coupled to peptidomic and lipidomic methodologies allowed the selection of molecules whose spatiotemporal pattern of expression was of potential interest. The identification of peptides was aided by comparing MS/MS spectra obtained for the peptidome extracted from embryonic and adult tissues to leech transcriptome and genome databases. Through the parallel use of a classical lipidomic approach and secondary ion mass spectrometry, specific lipids, including cannabinoids, gangliosides and several other types, were detected in adult ganglia following mechanical damage to connected nerves. These observations motivated a search for possible effects of cannabinoids on neurite outgrowth. Exposing nervous tissues to Transient Receptor Potential Vanilloid (TRPV) receptor agonists resulted in enhanced neurite outgrowth from a cut nerve, while exposure to antagonists blocked such outgrowth. CONCLUSION The experiments on the regenerating adult leech CNS reported here provide direct evidence of increased titers of proteins that are thought to play important roles in early stages of neural development. Our data further suggest that endocannabinoids also play key roles in CNS regeneration, mediated through the activation of leech TRPVs, as a thorough search of leech genome databases failed to reveal any leech orthologs of the mammalian cannabinoid receptors but revealed putative TRPVs. In sum, our observations identify a number of lipids and proteins that may contribute to different aspects of the complex phenomenon of leech nerve regeneration, establishing an important base for future functional assays.
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Affiliation(s)
- Céline Meriaux
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Karim Arafah
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Aurélie Tasiemski
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Maxence Wisztorski
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Jocelyne Bruand
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Céline Boidin-Wichlacz
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Annie Desmons
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Delphine Debois
- Institut de Chimie des Substances Naturelles, Centre de Recherche de Gif, Gif-sur-Yvette, France
| | - Olivier Laprévote
- Institut de Chimie des Substances Naturelles, Centre de Recherche de Gif, Gif-sur-Yvette, France
- Chimie Toxicologie Analytique et Cellulaire, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Paris, France
| | - Alain Brunelle
- Institut de Chimie des Substances Naturelles, Centre de Recherche de Gif, Gif-sur-Yvette, France
| | - Terry Gaasterland
- Marine Biology Research Division, Scripps Institution of Oceanography, Division of Biological Sciences, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Eduardo Macagno
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Isabelle Fournier
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
| | - Michel Salzet
- Université Lille Nord de France, Laboratoire de Spectrométrie de Masse Biologique Fondamentale et Appliquée (FABMS), EA 4550, Université Lille 1, Villeneuve d'Ascq, France
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Dondero F, Negri A, Boatti L, Marsano F, Mignone F, Viarengo A. Transcriptomic and proteomic effects of a neonicotinoid insecticide mixture in the marine mussel (Mytilus galloprovincialis, Lam.). THE SCIENCE OF THE TOTAL ENVIRONMENT 2010; 408:3775-3786. [PMID: 20417955 DOI: 10.1016/j.scitotenv.2010.03.040] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2009] [Revised: 03/22/2010] [Accepted: 03/25/2010] [Indexed: 05/29/2023]
Abstract
BACKGROUND Imidacloprid and Thiacloprid are two neonicotinoid insecticides whose use have been raising exponentially. Both act selectively as agonist of the insect nicotinic-Acetylcholine Receptor (nAChR) and therefore, by definition, they hold the same mode of action. Notwithstanding the growing attention to the ecotoxicological effects of neonicotinoids, there is a lack of information on their toxicodynamics and their mixture effects, in particular, in aquatic organisms. OBJECTIVES The main objectives of this work were: (i) assess sublethal effects of two neonicotinoids-Imidacloprid and Thiacloprid-in the tissues of the marine mussel (Mytilus galloprovincialis Lam.); (ii) identify the molecular dynamics elicited by the two chemicals through gene/protein expression profiling and a functional genomics approach; (iii) assess the effects of a neonicotinoid binary mixture. METHODS Sublethal effects were measured by means of digestive gland lysosomal membrane stability (LMS) and gill acetylcholinesterase (AChE) activity. Gene expression profiles were evaluated in the digestive gland using a 1.7K cDNA microarray and quantitative-PCR (Q-PCR). Proteome profiling was performed by means of two-dimensional electrophoresis of digestive gland cytosolic proteins. Functional genomics was based on the over-representation of Gene Ontology (GO) terms. RESULTS AND DISCUSSION Our results showed that (i) biomarkers responded in the micromolar range; (ii) Imidacloprid and Thiacloprid elicited distinct toxicodynamics as depicted by the different transcriptomic and proteomic profiles and the opposite trend of AChE activity; (iii) at biomarkers level, the joint effects of the two chemicals appeared to fulfill the principle of independence, but this was less evident at molecular level where a novel specific molecular signature took place. CONCLUSIONS These findings imply that different toxicodynamics may occur also as a response of chemicals with the same mode of action. Our results unveil also the incongruousness of the actual concept of pesticide mode of action in the context of ecological risk assessment analysis of chemical mixtures.
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Affiliation(s)
- Francesco Dondero
- Department of Environmental and Life Sciences, Università del Piemonte Orientale Amedeo Avogadro, Alessandria, Italy.
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Ji Y, Rath U, Girton J, Johansen KM, Johansen J. D-Hillarin, a novel W180-domain protein, affects cytokinesis through interaction with the septin family member Pnut. ACTA ACUST UNITED AC 2005; 64:157-69. [PMID: 15818553 DOI: 10.1002/neu.20131] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
By database searches of the Drosophila genome project we have identified D-hil as the fly member of a novel family of W180-domain containing proteins. Immunocytochemistry demonstrated that D-hil is localized to the neuropil of the embryonic CNS, to the cellular cortex of dividing neuroblasts from larval brains, and that it is up-regulated in the cleavage furrow of S2 cells. We show that D-hil distribution overlaps extensively with that of the septin family member Pnut. Cross-immunoprecipitation experiments further indicated that the two proteins may be members of the same protein complex. Analysis of a severe hypomorphic P-element mutation in the D-hil locus suggested that D-hil is a nonessential protein. However, by creating double mutant flies we show that the D-hil locus acts as a modulator of Pnut function by increasing the level of polyploidy of neuroblasts in Pnut(KG00478)/Pnut(KG00478) larval brains. Based on these results we propose that D-hil may function as a regulator of septin function during cytokinesis in the developing nervous system.
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Affiliation(s)
- Yun Ji
- Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA
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Vargas JD, Culetto E, Ponting CP, Miguel-Aliaga I, Davies KE, Sattelle DB. Cloning and developmental expression analysis of ltd-1, the Caenorhabditis elegans homologue of the mouse kyphoscoliosis (ky) gene. Mech Dev 2002; 117:289-92. [PMID: 12204272 DOI: 10.1016/s0925-4773(02)00182-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have characterized the developmental expression pattern of the Caenorhabditis elegans homologue of the mouse ky gene. The Ky protein has a putative key function in muscle development and has homologues in invertebrates, fungi and a cyanobacterium. The C. elegans Ky homologue gene has been named ltd-1 for LIM and transglutaminase domains gene. The LTD-1::GFP construct is expressed in developing hypodermal cells from the twofold stage embryo through adulthood. These data define the ltd-1 gene as a novel marker for C. elegans epithelial cell development.
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Affiliation(s)
- J D Vargas
- MRC Functional Genetics Unit, Department of Human Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK
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Ponting CP, Russell RR. The natural history of protein domains. ANNUAL REVIEW OF BIOPHYSICS AND BIOMOLECULAR STRUCTURE 2002; 31:45-71. [PMID: 11988462 DOI: 10.1146/annurev.biophys.31.082901.134314] [Citation(s) in RCA: 193] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Genome sequencing and structural genomics projects are providing new insights into the evolutionary history ofprote in domains. As methods for sequence and structure comparison improve, more distantly related domains are shown to be homologous. Thus there is a need for domain families to be classified within a hierarchy similar to Linnaeus' Systema Naturae, the classification of species. With such a hierarchy in mind, we discuss the evolution of domains, their combination into proteins, and evidence as to the likely origin of protein domains. We also discuss when and how analysis of domains can be used to understand details of protein function. Unconventional features of domain evolution such as intragenomic competition, domain insertion, horizontal gene transfer, and convergent evolution are seen as analogs of organismal evolutionary events. These parallels illustrate how the concept of domains can be applied to provide insights into evolutionary biology.
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Affiliation(s)
- Chris P Ponting
- Department of Human Anatomy and Genetics, University of Oxford, MRC Functional Genetics Unit, South Parks Road, Oxford OX1 3QX, UK.
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