Vianney Pichereau

Vianney Pichereau
Université de Bretagne Occidentale | UBO · Laboratoire des Sciences de l’Environnement Marin- LEMAR (UMR 6539)

PhD, HDR

About

121
Publications
15,156
Reads
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2,286
Citations
Introduction
Vianney Pichereau currently works at the Laboratoire des Sciences de l’Environnement Marin- LEMAR (UMR 6539), Université de Bretagne Occidentale. Vianney does research in Ecology, Marine Biology and Microbiology. One of his current project is 'Preventing and mitigating farmed bivalve diseases VIVALDI ( H2020).'
Additional affiliations
September 2009 - present
Université de Bretagne Occidentale
Position
  • Professor
September 2009 - present
Université de Bretagne Occidentale
Position
  • Professor (Full)
October 1998 - August 2009
Université de Caen Normandie
Position
  • Maître de Conférences

Publications

Publications (121)
Article
Full-text available
Background The capacity of marine species to survive chronic heat stress underpins their ability to survive warming oceans as a result of climate change. In this study RNA-Seq and 2-DE proteomics were employed to decipher the molecular response of the sub-tidal bivalve Pecten maximus, to elevated temperatures. Results Individuals were maintained a...
Article
Full-text available
Significance: Increasing atmospheric CO2 raises sea surface temperatures and results in ocean acidification, two climatic variables known to impact marine organisms. Larvae of calcifying species may be particularly at risk to such changing environmental conditions. The Pacific oyster Crassostrea gigas is ecologically and commercially important, an...
Article
Full-text available
Marine mollusc shells enclose a wealth of information on coastal organisms and their environment. Their life history traits as well as (palaeo-) environmental conditions, including temperature, food availability, salinity, and pollution, can be traced through the analysis of their shell (micro-) structure and biogeochemical composition. Adding to t...
Article
Estuaries are important areas highly vulnerable to anthropogenic pollutions. Therefore, the assessment of estuarine water quality is a major ecological issue. In this study, we sampled juveniles of the European flounder in the "pristine" Canche estuary, and caged them in Canche and in two polluted sites of the Seine estuary, Rouen and Fosse Nord. A...
Article
The Brown Ring Disease is an infection caused by the bacterium Vibrio tapetis on the Manila clam Ruditapes philippinarum. The process of infection, in the extrapallial fluids (EPFs) of clams, involves alteration of immune functions, in particular on hemocytes which are the cells responsible of phagocytosis. Disorganization of the actin-cytoskeleton...
Article
The Pacific oyster Crassostrea gigas is established in the marine intertidal zone, experiencing rapid and highly dynamic environmental changes throughout the tidal cycle. Depending on the bathymetry, oysters face oxygen deprivation, lack of nutrients, and high changes in temperature during alternation of the cycles of emersion/immersion. Here we sh...
Article
The king scallop, Pecten maximus is a highly valuable seafood in Europe. Over the last few years, its culture has been threatened by toxic microalgae during harmful algal blooms, inducing public health concerns. Indeed, phycotoxins accumulated in bivalves can be harmful for human, especially paralytic shellfish toxins (PST) synthesized by the micro...
Article
Full-text available
The main objective of this study was to improve our knowledge on the responses of fish populations to multistress (diffuse pollution and warming waters) in estuaries. Adult flounders were caught in two estuaries in the Eastern English Channel: the heavily polluted Seine estuary vs the moderately contaminated Canche estuary. Fish samplings were cond...
Article
Environmental Vibrio strains represent a major threat in aquaculture, but the understanding of their virulence mechanisms heavily relies on the transposition of knowledge from human‐pathogen vibrios. Here, the genetic bases of the virulence of Vibrio harveyi ORM4 toward the European abalone Haliotis tuberculata were characterized. We demonstrated t...
Article
Full-text available
Vibrio tapetis is a Gram-negative bacterium that causes infections of mollusk bivalves and fish. The Brown Ring Disease (BRD) is an infection caused by V. tapetis that primarily affects the Manila clam Ruditapes philippinarum . Recent studies have shown that a type IV secretion system (T4SS) gene cluster is exclusively found in strains of V. tapeti...
Article
Article available here -> https://authors.elsevier.com/a/1bTmjACeY5HTA Vibrio tapetis, the etiological agent of Brown Ring Disease, mainly affects the Manila clam Ruditapes philippinarum. Although this bacterium is mainly known as a clam pathogen, it has been isolated from several fish species. The main aim of the present study was to further explo...
Article
Full-text available
The objective of this study was to develop an integrative approach in ecotoxicology (from biomarkers to population genetics) to assess the ecological status of fish populations. Flounders (Platichthys flesus) collected after the spawning season in the heavily polluted Seine estuary were compared with the moderately polluted Bay of Douarnenez. The m...
Article
Aims: Brown Ring Disease (BRD) is an infection of the Manila clam Ruditapes philippinarum due to the pathogen Vibrio tapetis. During BRD, clams are facing immunodepression and shell biomineralization alteration. In this paper, we studied the role of pH on the growth of the pathogen and formulated hypothesis on the establishment of BRD by V. tapetis...
Data
Paillard C. Faure D. Orlando L. Le séquençage à haut débit ouvre les archives fossiles de l’ADN ancien, dans 101 secrets de l’ADN. CNRS Editions. Editeurs D Faure, D. Joly, S Salamitou. 368 pages. 2019. ⟨ hal−02370904⟩
Article
Marine mollusk aquaculture has more than doubled over the past twenty years, accounting for over 15% of total aquaculture production in 2016. Infectious disease is one of the main limiting factors to the development of mollusk aquaculture, and the difficulties inherent to combating pathogens through antibiotic therapies or disinfection have led to...
Article
Full-text available
The Warburg effect is one of the hallmarks of cancer cells in humans. It is a true metabolic reprogramming to aerobic glycolysis, allowing cancer cells to meet their particular energy needs for growth, proliferation, and resistance to apoptosis, depending on the microenvironment they encounter within the tumor. We have recently discovered that the...
Article
The Warburg effect is one of the hallmarks of cancer cells in humans. It is a true metabolic reprogramming to aerobic glycolysis, allowing cancer cells to meet their particular energy needs for growth, proliferation, and resistance to apoptosis, depending on the microenvironment they encounter within the tumor. We have recently discovered that the...
Article
Vibrio campbellii BAA-1116 is renowned for its bioluminescence properties, and genetic tools are available to genetically track this strain. However, many other ecologically important V. harveyi strains exist, for which only few genetic tools are available. In this study, a rapid electroporation protocol was developed to transform replicative plasm...
Article
Full-text available
The Brown Ring Disease (BRD) caused high mortality rates since 1986 in the Manila clam Venerupis philippinarum introduced and cultured in Western Europe from the 1970s. The causative agent of BRD is a Gram-Negative bacterium, Vibrio tapetis, which is also pathogenic to fish. Here we report the first assembly of the complete genome of V. tapetis CEC...
Article
Full-text available
Voltage-dependent anion channel (VDAC) is a key mitochondrial protein. VDAC drives cellular energy metabolism by controlling the influx and efflux of metabolites and ions through the mitochondrial membrane, playing a role in its permeabilization. This protein exerts a pivotal role during the white spot syndrome virus (WSSV) infection in shrimp, thr...
Conference Paper
Full-text available
Topic: Physiology and metabolism - Introduction: In the cheese industry context, Mucor species exhibit an ambivalent behavior, as some species are essential technological organisms contributing to the required organoleptic characteristics of some cheeses while some others can be spoiling agents. The present study aimed at better understanding this...
Article
Significance: The Mucor genus consists of a multitude of poorly known species. In the food context, few species are known for their positive role in the production of various food products, including cheese, while others are spoiling agents. The present study focused on the analysis of morphological and proteome differences of various Mucor spp. r...
Article
Full-text available
The data presented are associated with the “Proteomic analysis of the adaptative response of Mucor spp. to cheese environment” (S. MORIN-SARDIN, J.L. JANY, S. ARTIGAUD, V. PICHEREAU, B. BERNAY, E. COTON, S. MADEC, 2016) article [1]. Mucor metabolism is poorly documented in the litterature and while morphology and growth behavior suggest potential a...
Conference Paper
Le genre Mucor est composé d’espèces fongiques ubiquistes fréquemment associées à des contaminations de produits alimentaires dans lesquels elles peuvent être à l’origine d’altération des propriétés organoleptiques, engendrant de ce fait des pertes économiques. Par ailleurs, plusieurs espèces présentent un intérêt technologique, contribuant au déve...
Article
Full-text available
Oysters play an important role in estuarine and coastal marine habitats, where the majority of humans live. In these ecosystems, environmental degradation is substantial, and oysters must cope with highly dynamic and stressful environmental constraints during their lives in the intertidal zone. The availability of the genome sequence of the Pacific...
Data
Identified Crassostrea gigas protein kinases. Genbank accession number, classification (group/family/subfamily), query definition, best hit name, percentage of identity compared to other species with corresponding E-values, embryonic expression and differentially expression induced by stressors. Y: yes. U: up-regulation. D: Down-regulation. (XLSX)
Article
Full-text available
PURPOSE: Decompression sickness (DCS) is a poorly understood systemic disease caused by inadequate desaturation following a reduction in ambient pressure. Although recent studies highlight the importance of circulating factors, the available data are still puzzling. In this study, we aimed to identify proteins and biological pathways involved in th...
Poster
Full-text available
The Mucor genus includes a large number of ubiquitous fungal species found in the environment, on raw materials or foodstuffs. These species are regularly encountered as contaminants of meat, fruits, vegetables or processed products, such as dairy products. In these contexts, their uncontrolled growth may induce undesirable effects including off-fl...
Poster
Full-text available
Le genre Mucor est composé d’espèces fongiques ubiquistes fréquemment rencontrées comme contaminantes sur les produits alimentaires où elles peuvent être à l’origine d’effets indésirables. Plusieurs espèces présentent également un intérêt technologique, contribuant au développement de la texture et des caractéristiques sensorielles de produits ferm...
Poster
Full-text available
Elevated atmospheric pCO2 affects marine environments via rising sea-surface temperatures and reduced pH. Calcifying molluscs may be at risk due to increasing energetic costs of biomineralisation. We investigated proteomic and phenotypic responses of the pacific oyster Crassostrea gigas during early development (40 hours) under elevated temperature...
Article
Here we assess the physiological effects induced by environmental concentrations of pesticides in Pacific oyster Crassostrea gigas. Oysters were exposed for 14 d to trace levels of metconazole (0.2 and 2 µg/L), isoproturon (0.1 and 1 µg/L), or both in mixture (0.2 and 0.1 µg/L respectively). Exposure to trace levels of pesticides had no effect on f...
Conference Paper
Decompression sickness (DCS) is a poorly understood systemic disease caused by inadequate desaturation following a reduction in ambient pressure. Although recent studies highlight the importance of circulating factors, the available data are still puzzling. In this study we aimed to identify proteins and biological pathways involved in the developm...
Article
Full-text available
Hypoxia and hyperthermia are two connected consequences of the ongoing global change and constitute major threats for coastal marine organisms. In the present study, we used a proteomic approach to characterize the changes induced by hypoxia in the great scallop, Pecten maximus, subjected to three different temperatures (10 °C, 18 °C and 25 °C). We...
Technical Report
Full-text available
Tréguier A.M., Floc’H-Laizet C., 22 others, Paulet Y.M. and V. Pichereau, 2015.- LabexMER, A changing Ocean; 2012-2014 report. 90 p. available at http://www.labexmer.eu/fr/en/labexmer-2012-2014-report.pdf. Abstract: The cluster of excellence LabexMER was created in November 2011 in the framework of the French “investments for the future” program....
Conference Paper
Diatoms contribute to up to 40% of the global oceanic primary production of carbon, and iron (Fe) limits phytoplankton growth in 50% of the ocean. Copper (Cu) may also be determinant in low-Fe oceanic regions because of its suggested role in Fe acquisition. To investigate the effects of Fe and Cu limitations on the growth and physiology of diatoms,...
Article
Full-text available
Vibrio tubiashii is a marine pathogen isolated from larval and juvenile bivalve molluscs causing bacillary necrosis. Recent studies demonstrated the isolation of this species in a French experimental hatchery/nursery affecting Crassostrea gigas spat in 2007. Here, using larvae of C. gigas as an interaction model, we showed that the French V. tubias...
Article
Full-text available
Enterococcus faecalis is a Gram-positive commensal bacterium inhabiting the gastrointestinal tracts of human and other mammals, but is also increasingly recognized as an opportunistic human pathogen. Oxidative stress is one of the major challenges encountered by enterococci, both in their natural environment and during infection. In this paper, we...
Preprint
Full-text available
Hypoxia and hyperthermia are two connected consequences of the ongoing global change that constitute major threats for coastal marine organisms. In the present study, we used a proteomic approach to characterize the changes induced by hypoxia in individuals of the great scallop, Pecten maximus , subjected to three different temperatures, i.e. 10°C,...
Preprint
Hypoxia and hyperthermia are two connected consequences of the ongoing global change that constitute major threats for coastal marine organisms. In the present study, we used a proteomic approach to characterize the changes induced by hypoxia in individuals of the great scallop, Pecten maximus , subjected to three different temperatures, i.e. 10°C,...
Article
Full-text available
A multibiomarker approach was developed to evaluate the juvenile European flounder responses to a complex mixture of 9 polycyclic aromatic hydrocarbons (PAHs) and 12 polychlorinated biphenyls (PCBs). Exposure was performed through contaminated food pellets displaying: (1) PAH and PCB levels similar to those detected in the heavily polluted Seine es...
Article
Full-text available
Vibrio tapetis causes the brown ring disease in the Japanese clam Ruditapes philippinarum while Vibrio aestuarianus is associated with massive oyster mortalities. As extracellular proteins are often associated with the virulence of pathogenic bacteria, we undertook a proteomic approach to characterize the secretomes of both vibrios. The extracellul...
Article
Full-text available
The (p)ppGpp synthetase RelA contributes to stress adaptation and virulence in Enterococcus faecalis V583. A 2-dimensional electrophoresis proteomic analysis of 2 relA mutants, i.e., ΔrelA carrying a complete deletion of the relA gene, and ΔrelAsp that is deleted from only its 3' extremity, showed that 31 proteins were deregulated in 1 or both of t...
Article
Unlabelled: Comparing populations residing in contrasting environments is an efficient way to decipher how organisms modulate their physiology. Here we present the proteomic signatures of two populations in a non-model marine species, the great scallop Pecten maximus, living in the northern (Hordaland, Norway) and in the center (Brest, France) of...
Article
RNA-Seq transcriptome data were generated from mantle tissue of the great scallop, Pecten maximus. The consensus data were produced from a time course series of animals subjected to a 56-day thermal challenge at 3 different temperatures. A total of 26,064 contigs were assembled de novo, providing a useful resource for both the aquaculture community...
Article
Full-text available
Two-dimensional electrophoresis is a crucial method in proteomics that allows the characterization of proteins' function and expression. This usually implies the identification of proteins that are differentially expressed between two contrasting conditions, for example, healthy vs. diseased in human proteomics biomarker discovery, stressful condit...
Article
Estuaries are important areas highly susceptible to anthropogenic degradations like pollution. Estuarine species have thus to cope with many types of constraints depending on the estuaries' characteristics. The European flounder Platichthys flesus is considered as a sentinel species for the monitoring of estuarine water quality. In this study, juve...
Article
Full-text available
The objective was to describe and model variation patterns in individual fish responses to contaminants among estuaries, season and gender. Two hundred twenty-seven adult European flounders were collected in two seasons (winter and summer) in four estuaries along the Bay of Biscay (South West France), focusing on a pristine system (the Ster), vs. t...
Conference Paper
The global change has a major impact on oceans and animals that live in it. Among all its consequences on chemical and physical parameters, the increasing of sea temperature and hypoxic episodes, are of major