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Callac N, Giraud C, Boulo V, Wabete N, Pham D. Microbial biomarker detection in shrimp larvae rearing water as putative bio-surveillance proxies in shrimp aquaculture. PeerJ 2023; 11:e15201. [PMID: 37214103 PMCID: PMC10198154 DOI: 10.7717/peerj.15201] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 03/17/2023] [Indexed: 05/24/2023] Open
Abstract
Background Aquacultured animals are reared in water hosting various microorganisms with which they are in close relationships during their whole lifecycle as some of these microorganisms can be involved in their host's health or physiology. In aquaculture hatcheries, understanding the interactions existing between the natural seawater microbiota, the rearing water microbiota, the larval stage and the larval health status, may allow the establishment of microbial proxies to monitor the rearing ecosystems. Indeed, these proxies could help to define the optimal microbiota for shrimp larval development and could ultimately help microbial management. Methods In this context, we monitored the daily composition of the active microbiota of the rearing water in a hatchery of the Pacific blue shrimp Penaeus stylirostris. Two distinct rearing conditions were analyzed; one with antibiotics added to the rearing water and one without antibiotics. During this rearing, healthy larvae with a high survival rate and unhealthy larvae with a high mortality rate were observed. Using HiSeq sequencing of the V4 region of the 16S rRNA gene of the water microbiota, coupled with zootechnical and statistical analysis, we aimed to distinguish the microbial taxa related to high mortality rates at a given larval stage. Results We highlight that the active microbiota of the rearing water is highly dynamic whatever the larval survival rate. A clear distinction of the microbial composition is shown between the water harboring heathy larvae reared with antibiotics versus the unhealthy larvae reared without antibiotics. However, it is hard to untangle the effects of the antibiotic addition and of the larval death on the active microbiota of the rearing water. Various active taxa of the rearing water are specific to a given larval stage and survival rate except for the zoea with a good survival rate. Comparing these communities to those of the lagoon, it appears that many taxa were originally detected in the natural seawater. This highlights the great importance of the microbial composition of the lagoon on the rearing water microbiota. Considering the larval stage and larval survival we highlight that several genera: Nautella, Leisingera, Ruegerira, Alconivorax, Marinobacter and Tenacibaculum, could be beneficial for the larval survival and may, in the rearing water, overcome the r-strategist microorganisms and/or putative pathogens. Members of these genera might also act as probiotics for the larvae. Marivita, Aestuariicocccus, HIMB11 and Nioella, appeared to be unfavorable for the larval survival and could be associated with upcoming and occurring larval mortalities. All these specific biomarkers of healthy or unhealthy larvae, could be used as early routine detection proxies in the natural seawater and then during the first days of larval rearing, and might help to manage the rearing water microbiota and to select beneficial microorganisms for the larvae.
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Affiliation(s)
- Nolwenn Callac
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Ifremer, Nouméa, New-Caledonia
| | - Carolane Giraud
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Ifremer, Nouméa, New-Caledonia
- Institut des Sciences Exactes et Appliquées, University of New Caledonia, Nouméa, New-Calédonia
| | - Viviane Boulo
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Ifremer, Nouméa, New-Caledonia
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan via Domitia, Ifremer, Montpellier, France
| | - Nelly Wabete
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Ifremer, Nouméa, New-Caledonia
| | - Dominique Pham
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Ifremer, Nouméa, New-Caledonia
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Callac N, Boulo V, Giraud C, Beauvais M, Ansquer D, Ballan V, Maillez JR, Wabete N, Pham D. Microbiota of the Rearing Water of Penaeus stylirostris Larvae Influenced by Lagoon Seawater and Specific Key Microbial Lineages of Larval Stage and Survival. Microbiol Spectr 2022; 10:e0424122. [PMID: 36416556 PMCID: PMC9769815 DOI: 10.1128/spectrum.04241-22] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 11/09/2022] [Indexed: 11/24/2022] Open
Abstract
Aquacultured animals are reared in water, where they interact with microorganisms which can be involved in their development, immunity, and disease. It is therefore interesting to study the rearing water microbiota, especially in the hatcheries of the Pacific blue shrimp Penaeus stylirostris, where larval mass mortalities occur. In this study, using HiSeq sequencing of the V4 region of the 16S rRNA molecule coupled with zootechnical and chemical analyses, we investigated whether any microbial lineages could be associated with certain mortality rates at a given larval stage. Our results indicate that the active microbiota of the rearing water was highly dynamic throughout the rearing process, with distinct communities influenced by progressive water eutrophication, larval stage, and survival rate. Our data also highlighted the role of the lagoon seawater on the rearing water microbiome, as many operational taxonomic units (OTUs) specific to a given larval stage and survival rate were detected in the primary reservoir which contained the lagoon water. We also identified biomarkers specific to water eutrophication, with Alteromonadaceae, Vibrionaceae, and Methylophilaceae, respectively, linked to increases in ammonia, nitrogen, and soluble reactive phosphate, or to increases in colored dissolved organic matter in the rearing water; other biomarkers were specific to certain larval stages and survival rates. Indeed, the Marinobacteraceae were specific to the Nauplii, and the Thalassospiraceae and Saprospiraceae to the Zoea Good condition; when mortality occurred, the Litoricolaceae were specific to the Zoea Bad, Microbacteraceae to the Mysis Bad, and Methylophilaceae to the Mysis Worst condition. Thus, these biomarkers might be used as potential early warning sentinels in water storage to infer the evolution of larval rearing to improve shrimp larval rearing. IMPORTANCE In New Caledonia, rearing of P. stylirostris is one of the main economic activities; unfortunately, mass larval mortalities cause important production decreases, involving major economic losses for the farmers and the Territory. This phenomenon, which has occurred at any larval stage over the past decade, is poorly understood. The significance of our research is in the identification of biomarkers specific to larval stage and survival rate, with some of these biomarkers being already present in the lagoon water. This enhances the role of the lagoon on the active microbiota of the rearing water at various larval stages and survival rates. Together, our results help us understand which active microbial communities are present in the rearing water according to larval stage and health. This might lead to broader impacts on hatcheries by helping to develop useful tools for using the water-lagoon, reservoir, or rearing-to test for the presence of these biomarkers as an early monitoring strategy.
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Affiliation(s)
- Nolwenn Callac
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Viviane Boulo
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Carolane Giraud
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
- Institut des Sciences Exactes et Appliquées (ISEA), University of New Caledonia, Nouméa, New Caledonia
| | - Maxime Beauvais
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Dominique Ansquer
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Valentine Ballan
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Jean-René Maillez
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Nelly Wabete
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Dominique Pham
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
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De San Nicolas N, Asokan A, Rosa RD, Voisin SN, Travers MA, Rocha G, Dantan L, Dorant Y, Mitta G, Petton B, Charrière GM, Escoubas JM, Boulo V, Pouzadoux J, Meudal H, Loth K, Aucagne V, Delmas AF, Bulet P, Montagnani C, Destoumieux-Garzón D. Functional Diversification of Oyster Big Defensins Generates Antimicrobial Specificity and Synergy against Members of the Microbiota. Mar Drugs 2022; 20:md20120745. [PMID: 36547892 PMCID: PMC9786018 DOI: 10.3390/md20120745] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Big defensins are two-domain antimicrobial peptides (AMPs) that have highly diversified in mollusks. Cg-BigDefs are expressed by immune cells in the oyster Crassostrea gigas, and their expression is dampened during the Pacific Oyster Mortality Syndrome (POMS), which evolves toward fatal bacteremia. We evaluated whether Cg-BigDefs contribute to the control of oyster-associated microbial communities. Two Cg-BigDefs that are representative of molecular diversity within the peptide family, namely Cg-BigDef1 and Cg-BigDef5, were characterized by gene cloning and synthesized by solid-phase peptide synthesis and native chemical ligation. Synthetic peptides were tested for antibacterial activity against a collection of culturable bacteria belonging to the oyster microbiota, characterized by 16S sequencing and MALDI Biotyping. We first tested the potential of Cg-BigDefs to control the oyster microbiota by injecting synthetic Cg-BigDef1 into oyster tissues and analyzing microbiota dynamics over 24 h by 16S metabarcoding. Cg-BigDef1 induced a significant shift in oyster microbiota β-diversity after 6 h and 24 h, prompting us to investigate antimicrobial activities in vitro against members of the oyster microbiota. Both Cg-BigDef1 and Cg-BigDef5 were active at a high salt concentration (400 mM NaCl) and showed broad spectra of activity against bacteria associated with C. gigas pathologies. Antimicrobial specificity was observed for both molecules at an intra- and inter-genera level. Remarkably, antimicrobial spectra of Cg-BigDef1 and Cg-BigDef5 were complementary, and peptides acted synergistically. Overall, we found that primary sequence diversification of Cg-BigDefs has generated specificity and synergy and extended the spectrum of activity of this peptide family.
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Affiliation(s)
- Noémie De San Nicolas
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Aromal Asokan
- Centre de Biophysique Moléculaire UPR4301 CNRS, 45071 Orléans, France
| | - Rafael D. Rosa
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | | | - Marie-Agnès Travers
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Gustavo Rocha
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | - Luc Dantan
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Yann Dorant
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Guillaume Mitta
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
- Ifremer, IRD, ILM, Université de Polynésie Française, UMR EIO, Vairao 98179, French Polynesia
| | - Bruno Petton
- Ifremer, CNRS, IRD, Ifremer, LEMAR UMR 6539, Université de Bretagne Occidentale, 29840 Argenton-en-Landunvez, France
| | - Guillaume M. Charrière
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Jean-Michel Escoubas
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Viviane Boulo
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Juliette Pouzadoux
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Hervé Meudal
- Centre de Biophysique Moléculaire UPR4301 CNRS, 45071 Orléans, France
| | - Karine Loth
- Centre de Biophysique Moléculaire UPR4301 CNRS, 45071 Orléans, France
- UFR ST, Université d’Orléans, 45067 Orléans, France
| | - Vincent Aucagne
- Centre de Biophysique Moléculaire UPR4301 CNRS, 45071 Orléans, France
| | - Agnès F. Delmas
- Centre de Biophysique Moléculaire UPR4301 CNRS, 45071 Orléans, France
| | - Philippe Bulet
- Plateforme BioPark d’Archamps, Archparc, 74160 Archamps, France
- CR UGA, IAB, INSERM U1209, CNRS UMR5309, 74160 La Tronche-Archamps, France
| | - Caroline Montagnani
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
| | - Delphine Destoumieux-Garzón
- IHPE, University Montpellier, CNRS, Ifremer, University Perpignan Via Domitia, 34090 Montpellier, France
- Correspondence: ; Tel.: +33-467144625
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Chong-Robles J, Giffard-Mena I, Patrón-Soberano A, Charmantier G, Boulo V, Rodarte-Venegas D. Ontogenetical development of branchial chambers of Litopenaeus vannamei (Boone, 1931) and their involvement in osmoregulation: ionocytes and Na +/K +-ATPase. Cell Tissue Res 2022; 390:385-398. [PMID: 36075993 DOI: 10.1007/s00441-022-03675-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 08/18/2021] [Accepted: 08/17/2022] [Indexed: 11/24/2022]
Abstract
Branchial chambers constitute the main osmoregulatory site in almost all decapod crustaceans. However, few studies have been devoted to elucidate the cellular function of specific cells in every osmoregulatory structure of the branchial chambers. In decapod crustaceans, it is well-known that the osmoregulatory function is localized in specific structures that progressively specialize from early developmental stages while specific molecular mechanisms occur. In this study, we found that although the structures developed progressively during the larval and postlarval stages, before reaching juvenile or adult morphology, the osmoregulatory capabilities of Litopenaeus vannamei were gradually established only during the development of branchiostegites and epipodites, but not gills. The cellular structures of the branchial chambers observed during the larval phase do not present the typical ultrastructure of ionocytes, neither Na+/K+-ATPase expression, likely indicating that pleura, branchiostegites, or bud gills do not participate in osmoregulation. During early postlarval stages, the lack of Na+/K+-ATPase immunoreactivity of the ionocytes from the branchiostegites and epipodites suggests that they are immature ionocytes (ionocytes type I). It could be inferred from IIF and TEM results that epipodites and branchiostegites are involved in iono-osmoregulation from PL15, while gills and pleura do not participate in this function.
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Affiliation(s)
- Jennyfers Chong-Robles
- Facultad de Ciencias Marinas, Universidad Autónoma de Baja California (https://ror.org/05xwcq167), Ensenada, Baja California, Mexico.
| | - Ivone Giffard-Mena
- Facultad de Ciencias Marinas, Universidad Autónoma de Baja California (https://ror.org/05xwcq167), Ensenada, Baja California, Mexico
| | - Araceli Patrón-Soberano
- División de Biología Molecular, Instituto Potosino de Investigación Cientifica y Tecnológica, San Luis Potosí, Mexico
| | - Guy Charmantier
- Marbec, Université de Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | - Viviane Boulo
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, Montpellier, France
| | - Deyanira Rodarte-Venegas
- Facultad de Ciencias, Universidad Autónoma de Baja California (https://ror.org/05xwcq167), Ensenada, Baja California, Mexico
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Giraud C, Callac N, Boulo V, Lam JS, Pham D, Selmaoui-Folcher N, Wabete N. The Active Microbiota of the Eggs and the Nauplii of the Pacific Blue Shrimp Litopenaeus stylirostris Partially Shaped by a Potential Vertical Transmission. Front Microbiol 2022; 13:886752. [PMID: 35633721 PMCID: PMC9133551 DOI: 10.3389/fmicb.2022.886752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
The many ecological niches present in an organism harbor distinct microorganisms called microbiota. Different factors can influence the establishment of these commensal microbial communities. In a previous article, we have concluded that some bacterial lineages associated with the early larval stages of the Pacific blue shrimp Litopenaeus stylirostris could be acquired from the breeders via a potential vertical transmission. The present study was conducted in order to investigate this hypothesis. Using HiSeq sequencing of the V4 region of 16S rRNA gene, we analyzed the active microbiota associated with the eggs and the nauplii of L. stylirsotris as well as with the reproductive organs of their breeders. Microbial communities associated with the rearing water were also considered to discriminate environmental microbial lineages. Using these analyses, we highlight a set of core bacterial families present in all samples and composed of members of Colwelliaceae, Alteromonadaceae, Pseudoalteromonadaceae, Saccharospirillaceae, Oceanospirillaceae, Vibrionaceae, Burkholderiaceae, Rhodobacteraceae, Flavobacteraceae, and Corynebacteriaceae; showing the importance of the environment in the establishment of the larval microbiota. We also present specific bacteria affiliated to the Arcobacteraceae, Rhodobacteraceae, Comamonadaceae, and Colwelliaceae families, which were only found in the breeders and their offspring strengthening the hypothesis of a potential vertical transmission shaping the active microbiota of the eggs and the nauplii of L. stylirostris.
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Affiliation(s)
- Carolane Giraud
- UMR 9220 ENTROPIE, Ifremer (LEAD-NC), Noumea, New Caledonia
- Institut des Sciences Exactes et Appliquées (ISEA), University of New Caledonia, Noumea, New Caledonia
- *Correspondence: Carolane Giraud,
| | - Nolwenn Callac
- UMR 9220 ENTROPIE, Ifremer (LEAD-NC), Noumea, New Caledonia
- Nolwenn Callac,
| | - Viviane Boulo
- UMR 9220 ENTROPIE, Ifremer (LEAD-NC), Noumea, New Caledonia
| | | | - Dominique Pham
- UMR 9220 ENTROPIE, Ifremer (LEAD-NC), Noumea, New Caledonia
| | - Nazha Selmaoui-Folcher
- Institut des Sciences Exactes et Appliquées (ISEA), University of New Caledonia, Noumea, New Caledonia
| | - Nelly Wabete
- UMR 9220 ENTROPIE, Ifremer (LEAD-NC), Noumea, New Caledonia
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Giraud C, Callac N, Beauvais M, Mailliez JR, Ansquer D, Selmaoui-Folcher N, Pham D, Wabete N, Boulo V. Potential lineage transmission within the active microbiota of the eggs and the nauplii of the shrimp Litopenaeus stylirostris: possible influence of the rearing water and more. PeerJ 2021; 9:e12241. [PMID: 34820157 PMCID: PMC8601056 DOI: 10.7717/peerj.12241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/23/2021] [Accepted: 09/12/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Microbial communities associated with animals are known to be key elements in the development of their hosts. In marine environments, these communities are largely under the influence of the surrounding water. In aquaculture, understanding the interactions existing between the microbiotas of farmed species and their rearing environment could help establish precise bacterial management. METHOD In light of these facts, we studied the active microbial communities associated with the eggs and the nauplii of the Pacific blue shrimp (Litopenaeus stylirostris) and their rearing water. All samples were collected in September 2018, November 2018 and February 2019. After RNA extractions, two distinct Illumina HiSeq sequencings were performed. Due to different sequencing depths and in order to compare samples, data were normalized using the Count Per Million method. RESULTS We found a core microbiota made of taxa related to Aestuariibacter, Alteromonas, Vibrio, SAR11, HIMB11, AEGEAN 169 marine group and Candidatus Endobugula associated with all the samples indicating that these bacterial communities could be transferred from the water to the animals. We also highlighted specific bacterial taxa in the eggs and the nauplii affiliated to Pseudomonas, Corynebacterium, Acinetobacter, Labrenzia, Rothia, Thalassolituus, Marinobacter, Aureispira, Oleiphilus, Profundimonas and Marinobacterium genera suggesting a possible prokaryotic vertical transmission from the breeders to their offspring. This study is the first to focus on the active microbiota associated with early developmental stages of a farmed shrimp species and could serve as a basis to comprehend the microbial interactions involved throughout the whole rearing process.
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Affiliation(s)
- Carolane Giraud
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
- University of New Caledonia, Institut des Sciences Exactes et Appliquées (ISEA), Noumea, New Caledonia
| | - Nolwenn Callac
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
| | - Maxime Beauvais
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
- Sorbonne Université, UMR 7261, Laboratoire d’Océanographie Microbienne, Observatoire Océanologique de Banyuls-sur-Mer, CNRS, Banyuls-sur-Mer, France
| | - Jean-René Mailliez
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
| | - Dominique Ansquer
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
| | - Nazha Selmaoui-Folcher
- University of New Caledonia, Institut des Sciences Exactes et Appliquées (ISEA), Noumea, New Caledonia
| | - Dominique Pham
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
| | - Nelly Wabete
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
| | - Viviane Boulo
- Ifremer, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, CNRS, UMR 9220 ENTROPIE, Noumea, New Caledonia
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan via Domitia, Montpellier, France
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Maugars G, Manirafasha MC, Grousset E, Boulo V, Lignot JH. The effects of acute transfer to freshwater on ion transporters of the pharyngeal cavity in European seabass (Dicentrarchus labrax). Fish Physiol Biochem 2018; 44:1393-1408. [PMID: 29923042 DOI: 10.1007/s10695-018-0529-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 11/21/2017] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Gene expression of key ion transporters (the Na+/K+-ATPase NKA, the Na+, K+-2Cl- cotransporter NKCC1, and CFTR) in the gills, opercular inner epithelium, and pseudobranch of European seabass juveniles (Dicentrarchus labrax) were studied after acute transfer up to 4 days from seawater (SW) to freshwater (FW). The functional remodeling of these organs was also studied. Handling stress (SW to SW transfer) rapidly induced a transcript level decrease for the three ion transporters in the gills and operculum. NKA and CFTR relative expression level were stable, but in the pseudobranch, NKCC1 transcript levels increased (up to 2.4-fold). Transfer to FW induced even more organ-specific responses. In the gills, a 1.8-fold increase for NKA transcript levels occurs within 4 days post transfer with also a general decrease for CFTR and NKCC1. In the operculum, transcript levels are only slightly modified. In the pseudobranch, there is a transient NKCC1 increase followed by 0.6-fold decrease and 0.8-fold CFTR decrease. FW transfer also induced a density decrease for the opercular ionocytes and goblet cells. Therefore, gills and operculum display similar trends in SW-fish but have different responses in FW-transferred fish. Also, the pseudobranch presents contrasting response both in SW and in FW, most probably due to the high density of a cell type that is morphologically and functionally different compared to the typical gill-type ionocyte. This pseudobranch-type ionocyte could be involved in blood acid-base regulation masking a minor osmotic regulatory capacity of this organ compared to the gills.
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Affiliation(s)
- Gersende Maugars
- University of Montpellier, UMR MARBEC, MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - Marie-Chanteuse Manirafasha
- University of Montpellier, UMR MARBEC, MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - Evelyse Grousset
- University of Montpellier, UMR MARBEC, MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - Viviane Boulo
- Ifremer, UR Lagons, Ecosystèmes et Aquaculture Durable, Nouvelle-Calédonie, France
| | - Jehan-Hervé Lignot
- University of Montpellier, UMR MARBEC, MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), Place Eugène Bataillon, 34095, Montpellier Cedex 5, France.
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Labreuche Y, Chenivesse S, Jeudy A, Le Panse S, Boulo V, Ansquer D, Pagès S, Givaudan A, Czjzek M, Le Roux F. Nigritoxin is a bacterial toxin for crustaceans and insects. Nat Commun 2017; 8:1248. [PMID: 29093459 PMCID: PMC5665878 DOI: 10.1038/s41467-017-01445-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 09/14/2017] [Indexed: 11/29/2022] Open
Abstract
The Tetraconata (Pancrustacea) concept proposes that insects are more closely related to aquatic crustaceans than to terrestrial centipedes or millipedes. The question therefore arises whether insects have kept crustacean-specific genetic traits that could be targeted by specific toxins. Here we show that a toxin (nigritoxin), originally identified in a bacterial pathogen of shrimp, is lethal for organisms within the Tetraconata and non-toxic to other animals. X-ray crystallography reveals that nigritoxin possesses a new protein fold of the α/β type. The nigritoxin N-terminal domain is essential for cellular translocation and likely encodes specificity for Tetraconata. Once internalized by eukaryotic cells, nigritoxin induces apoptotic cell death through structural features that are localized in the C-terminal domain of the protein. We propose that nigritoxin will be an effective means to identify a Tetraconata evolutionarily conserved pathway and speculate that nigritoxin holds promise as an insecticidal protein. The Tetraconata concept suggests that insects and crustaceans may share evolutionarily conserved pathways. Here, the authors describe the animal tropism and structure-function relationship of nigritoxin, showing that this protein is lethal for insects and crustaceans but harmless to other animals.
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Affiliation(s)
- Yannick Labreuche
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, CS 10070, F-29280, Plouzané, France.,Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Sabine Chenivesse
- Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Alexandra Jeudy
- Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Sophie Le Panse
- CNRS, FR 2424, Plateforme Merimage, Station Biologique de Roscoff, Place Georges Teissier, CS 90074, F-29688, Roscoff cedex, France
| | - Viviane Boulo
- Département Lagons, Ecosystèmes et Aquaculture Durables en Nouvelle-Calédonie, IFREMER, BP 2059, 98846, Nouméa cedex, New Caledonia
| | - Dominique Ansquer
- Département Lagons, Ecosystèmes et Aquaculture Durables en Nouvelle-Calédonie, IFREMER, BP 2059, 98846, Nouméa cedex, New Caledonia
| | - Sylvie Pagès
- UMR 1333 "Diversité, Génomes & Interactions Microorganismes - Insectes" Université Montpellier 2 - Place Eugène Bataillon, 34095, Montpellier cedex 5, France
| | - Alain Givaudan
- UMR 1333 "Diversité, Génomes & Interactions Microorganismes - Insectes" Université Montpellier 2 - Place Eugène Bataillon, 34095, Montpellier cedex 5, France
| | - Mirjam Czjzek
- Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Frédérique Le Roux
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, CS 10070, F-29280, Plouzané, France. .,Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France.
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Boudour-Boucheker N, Boulo V, Charmantier-Daures M, Anger K, Charmantier G, Lorin-Nebel C. Osmoregulation in larvae and juveniles of two recently separated Macrobrachium species: Expression patterns of ion transporter genes. Comp Biochem Physiol A Mol Integr Physiol 2016; 195:39-45. [DOI: 10.1016/j.cbpa.2016.02.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/02/2016] [Accepted: 02/07/2016] [Indexed: 11/27/2022]
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Pham D, Charmantier G, Boulo V, Wabete N, Ansquer D, Dauga C, Grousset E, Labreuche Y, Charmantier-Daures M. Ontogeny of osmoregulation in the Pacific blue shrimp, Litopenaeus stylirostris (Decapoda, Penaeidae): Deciphering the role of the Na(+)/K(+)-ATPase. Comp Biochem Physiol B Biochem Mol Biol 2016; 196-197:27-37. [PMID: 26827851 DOI: 10.1016/j.cbpb.2015.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 07/22/2015] [Revised: 11/19/2015] [Accepted: 12/02/2015] [Indexed: 12/20/2022]
Abstract
The role of the main ion transporting enzyme Na+/K+-ATPase in osmoregulation processes was investigated in Litopenaeus stylirostris. The development and localization of the osmoregulation sites were studied during ontogenesis by immunodetection of Na(+)K(+)-ATPase using monoclonal antibodies and transmission electron microscopy (TEM). Osmoregulation sites were identified as the pleurae and branchiostegites in the zoeae and mysis stages. In the subsequent post-metamorphic stages the osmoregulatory function was mainly located in the epipodites and branchiostegites and osmotic regulation was later detected in the gills. The presence of ionocytes and microvilli in these tissues confirmed their role in ionic processes. The complete open reading frame of the mRNA coding for the α-subunit of Na+K+-ATPase was characterized in L. stylirostris. The resulting 3092-bp cDNA (LsNKA) encodes a putative 1011-amino-acid protein with a predicted molecular mass of 112.3kDa. The inferred amino acid sequence revealed that the putative protein possesses the main structural characteristics of the Na+K+-ATPase α-subunits. Quantitative RT-PCR analyses indicated that LsNKA transcripts did not significantly vary between the different developmental stages. The number of transcripts was about 2.5-fold higher in the epipodites and gills than in any other tissues tested in juveniles. A reverse genetic approach was finally implemented to study the role of LsNKA in vivo. Knockdown of LsNKA expression by gene-specific dsRNA injection led to an increase of shrimp mortality following an abrupt salinity change compared to control animals. These data strongly suggest that LsNKA plays an important role in osmoregulation when the shrimp are challenged by changing salinities.
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Affiliation(s)
- Dominique Pham
- Lagon, Environnement et Aquaculture Durable, Ifremer, Boulouparis, Nouvelle-Calédonie, France.
| | - Guy Charmantier
- Université de Montpellier, Adaptation Ecophysiologique et Ontogenèse, UMR 9190, Marbec, UM, CNRS, IRD, Ifremer, Place Eugène Bataillon, CC 092, 34095 Montpellier Cedex 05, France
| | - Viviane Boulo
- Lagon, Environnement et Aquaculture Durable, Ifremer, Boulouparis, Nouvelle-Calédonie, France; Université de Montpellier, Adaptation Ecophysiologique et Ontogenèse, UMR 9190, Marbec, UM, CNRS, IRD, Ifremer, Place Eugène Bataillon, CC 092, 34095 Montpellier Cedex 05, France
| | - Nelly Wabete
- Lagon, Environnement et Aquaculture Durable, Ifremer, Boulouparis, Nouvelle-Calédonie, France
| | - Dominique Ansquer
- Lagon, Environnement et Aquaculture Durable, Ifremer, Boulouparis, Nouvelle-Calédonie, France
| | - Clément Dauga
- Lagon, Environnement et Aquaculture Durable, Ifremer, Boulouparis, Nouvelle-Calédonie, France
| | - Evelyse Grousset
- Université de Montpellier, Adaptation Ecophysiologique et Ontogenèse, UMR 9190, Marbec, UM, CNRS, IRD, Ifremer, Place Eugène Bataillon, CC 092, 34095 Montpellier Cedex 05, France
| | - Yannick Labreuche
- Ifremer, Unite Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, CS 10070, F-29280 Plouzane, France; Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France.
| | - Mireille Charmantier-Daures
- Université de Montpellier, Adaptation Ecophysiologique et Ontogenèse, UMR 9190, Marbec, UM, CNRS, IRD, Ifremer, Place Eugène Bataillon, CC 092, 34095 Montpellier Cedex 05, France
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Boudour-Boucheker N, Boulo V, Charmantier-Daures M, Grousset E, Anger K, Charmantier G, Lorin-Nebel C. Differential distribution of V-type H(+)-ATPase and Na (+)/K (+)-ATPase in the branchial chamber of the palaemonid shrimp Macrobrachium amazonicum. Cell Tissue Res 2014; 357:195-206. [PMID: 24805036 DOI: 10.1007/s00441-014-1845-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 02/05/2014] [Indexed: 01/08/2023]
Abstract
V-H(+)-ATPase and Na(+)/K(+)-ATPase were localized in the gills and branchiostegites of M. amazonicum and the effects of salinity on the branchial chamber ultrastructure and on the localization of transporters were investigated. Gills present septal and pillar cells. In freshwater (FW), the apical surface of pillar cells is amplified by extensive evaginations associated with mitochondria. V-H(+)-ATPase immunofluorescence was localized in the membranes of the apical evaginations and in clustered subapical areas of pillar cells, suggesting labeling of intracellular vesicle membranes. Na(+)/K(+)-ATPase labeling was restricted to the septal cells. No difference in immunostaining was recorded for both proteins according to salinity (FW vs. 25 PSU). In the branchiostegite, both V-H(+)-ATPase and Na(+)/K(+)-ATPase immunofluorescence were localized in the same cells of the internal epithelium. Immunogold revealed that V-H(+)-ATPase was localized in apical evaginations and in electron-dense areas throughout the inner epithelium, while Na(+)/K(+)-ATPase occurred densely along the basal infoldings of the cytoplasmic membrane. Our results suggest that morphologically different cell types within the gill lamellae may also be functionally specialized. We propose that, in FW, pillar cells expressing V-H(+)-ATPase absorb ions (Cl(-), Na(+)) that are transported either directly to the hemolymph space or through a junctional complex to the septal cells, which may be responsible for active Na(+) delivery to the hemolymph through Na(+)/K(+)-ATPase. This suggests a functional link between septal and pillar cells in osmoregulation. When shrimps are transferred to FW, gill and branchiostegite epithelia undergo ultrastructural changes, most probably resulting from their involvement in osmoregulatory processes.
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Affiliation(s)
- Nesrine Boudour-Boucheker
- Université Montpellier 2, Equipe Adaptation Ecophysiologique et Ontogénèse, UMR5119 EcoSyM, UM2-UM1, CNRS-IRD-Ifremer, cc 092, Place E. Bataillon, 34095, Montpellier cedex 05, France,
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Bossus M, Charmantier G, Blondeau-Bidet E, Valletta B, Boulo V, Lorin-Nebel C. The ClC-3 chloride channel and osmoregulation in the European sea bass, Dicentrarchus labrax. J Comp Physiol B 2013; 183:641-62. [PMID: 23292336 DOI: 10.1007/s00360-012-0737-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 09/27/2012] [Accepted: 11/23/2012] [Indexed: 11/29/2022]
Abstract
Dicentrarchus labrax migrates between sea (SW), brackish and fresh water (FW) where chloride concentrations and requirements for chloride handling change: in FW, fish absorb chloride and restrict renal losses; in SW, they excrete chloride. In this study, the expression and localization of ClC-3 and Na(+)/K(+)-ATPase (NKA) were studied in fish adapted to SW, or exposed to FW from 10 min to 30 days. In gills, NKA-α1 subunit expression transiently increased from 10 min and reached a stabilized intermediate expression level after 24 h in FW. ClC-3 co-localized with NKA in the basolateral membrane of mitochondria-rich cells (MRCs) at all conditions. The intensity of MRC ClC-3 immunostaining was significantly higher (by 50 %) 1 h after the transfer to FW, whereas the branchial ClC-3 protein expression was 30 % higher 7 days after the transfer as compared to SW. This is consistent with the increased number of immunopositive MRCs (immunostained for NKA and ClC-3). However, the ClC-3 mRNA expression was significantly lower in FW gills. In the kidney, after FW transfer, a transient decrease in NKA-α1 subunit expression was followed by significantly higher stable levels from 24 h. The low ClC-3 protein expression detected at both salinities was not observed by immunocytochemistry in the SW kidney; ClC-3 was localized in the basal membrane of the collecting ducts and tubules 7 and 30 days after transfer to FW. Renal ClC-3 mRNA expression, however, seemed higher in SW than in FW. The potential role of this chloride channel ClC-3 in osmoregulatory and osmosensing mechanisms is discussed.
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Affiliation(s)
- Maryline Bossus
- Equipe Adaptation Ecophysiologique et Ontogenèse, UMR5119 - EcoSyM, UM2-UM1-CNRS-IRD-IFREMER, cc 092, Place E. Bataillon, 34095 Montpellier cedex 05, France.
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13
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Boudour-Boucheker N, Boulo V, Lorin-Nebel C, Elguero C, Grousset E, Anger K, Charmantier-Daures M, Charmantier G. Adaptation to freshwater in the palaemonid shrimp Macrobrachium amazonicum: comparative ontogeny of osmoregulatory organs. Cell Tissue Res 2013; 353:87-98. [DOI: 10.1007/s00441-013-1622-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 03/26/2013] [Indexed: 10/26/2022]
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14
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Sucré E, Bossus M, Bodinier C, Boulo V, Charmantier G, Charmantier-Daures M, Cucchi P. Osmoregulatory response to low salinities in the European sea bass embryos: a multi-site approach. J Comp Physiol B 2012; 183:83-97. [DOI: 10.1007/s00360-012-0687-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 06/06/2012] [Accepted: 06/14/2012] [Indexed: 01/14/2023]
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Giffard-Mena I, Boulo V, Abed C, Cramb G, Charmantier G. Expression and Localization of Aquaporin 1a in the Sea-Bass (Dicentrarchus labrax) during Ontogeny. Front Physiol 2011; 2:34. [PMID: 21808622 PMCID: PMC3137954 DOI: 10.3389/fphys.2011.00034] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [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: 04/22/2011] [Accepted: 06/20/2011] [Indexed: 01/24/2023] Open
Abstract
The successful establishment of a species in a given habitat depends on the ability of each of its developing stages to adapt to the environment. In order to understand this process we have studied the adaptation of a euryhaline fish, the sea-bass Dicentrarchus labrax, to various salinities during its ontogeny. The expression and localization of Aquaporin 1a (AQP1a) mRNA and protein were determined in different osmoregulatory tissues. In larvae, the sites of AQP1a expression are variable and they shift according to age, implying functional changes. In juveniles after metamorphosis (D32-D48 post-hatch, 15-25 mm) and in pre-adults, an increase in AQP1a transcript abundance was noted in the digestive tract, and the AQP1a location was observed in the intestine. In juveniles (D87-D100 post-hatch, 38-48 mm), the transcript levels of AQP1a in the digestive tract and in the kidney were higher in sea water (SW) than at lower salinity. These observations, in agreement with existing models, suggest that in SW-acclimated fish, the imbibed water is absorbed via AQP1a through the digestive tract, particularly the intestine and the rectum. In addition, AQP1a may play a role in water reabsorption in the kidney. These mechanisms compensate dehydration in SW, and they contribute to the adaptation of juveniles to salinity changes during sea-lagoon migrations. These results contribute to the interpretation of the adaptation of populations to habitats where salinity varies.
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Affiliation(s)
- Ivone Giffard-Mena
- Molecular Ecology Laboratory, Universidad Autónoma de Baja CaliforniaEnsenada, Baja California, Mexico
| | - Viviane Boulo
- Adaptation Ecophysiologique et Ontogenèse Team, UMR5119, CNRS, IFREMER Ecosym, Université Montpellier 2Montpellier, France
| | - Charline Abed
- Adaptation Ecophysiologique et Ontogenèse Team, UMR5119, CNRS, IFREMER Ecosym, Université Montpellier 2Montpellier, France
| | - Gordon Cramb
- School of Biology, University of St AndrewsSt Andrews, Fife, UK
| | - Guy Charmantier
- Adaptation Ecophysiologique et Ontogenèse Team, UMR5119, CNRS, IFREMER Ecosym, Université Montpellier 2Montpellier, France
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Issartel J, Boulo V, Wallon S, Geffard O, Charmantier G. Cellular and molecular osmoregulatory responses to cadmium exposure in Gammarus fossarum (Crustacea, Amphipoda). Chemosphere 2010; 81:701-710. [PMID: 20843535 DOI: 10.1016/j.chemosphere.2010.07.063] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 07/21/2010] [Accepted: 07/28/2010] [Indexed: 05/29/2023]
Abstract
Osmoregulation represents a reliable indicator of the physiological state of crustaceans. It is mainly effected in gills via Na(+)/K(+)-ATPase (NKA) providing the major driving force for ion transport. In the present study conducted in the freshwater amphipod Gammarus fossarum, the impact of an exposure to 15 μg Cd L(-1) for 3 and 7d was investigated on the haemolymph osmolality (HO), gill structure, NKA localization in gills and its relative expression. In Cd-exposed G. fossarum, mean HO significantly decreased compared to controls. In animals exposed for 3 and 7d, high inter-individual variations in HO values were noted, resulting in their separation into unimpacted, slightly impacted and impacted animals. In unimpacted individuals, gills retained their organization, showing a thicker gill epithelium than in controls; NKA fluorescence was continuously observed along the gill epithelium and was distributed on a broader area than in controls. In slightly impacted individuals, a thinner epithelium, a slight collapse of the gill and a lower NKA fluorescence were observed compared to unimpacted specimens. In impacted individuals, dramatic alterations of the gill structure, including hyperplasia and alteration of the pillars, resulting in the collapse of the gill and the disappearance of the haemolymphatic canals were observed, as well as very limited NKA fluorescence. Therefore, the degree of gill alteration and the intensity of NKA fluorescence observed in the different groups were correlated with their respective HO levels. The relative amount of the NKA α-subunit mRNA significantly increased in specimens exposed to Cd for 3d compared to controls, and then returned to control level after 7d. The relationships between the changes in HO values, NKA immunostaining and mRNA relative expression are discussed. These results confirm that HO represents a valuable biomarker to evaluate crustacean health, and they underline the interest to assess individual responses to contaminants.
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Affiliation(s)
- Julien Issartel
- Equipe Adaptation Ecophysiologique et Ontogenèse, UMR 5119 Ecolag, UM2 - CNRS - IRD - IFREMER, Université Montpellier 2, 34095 Montpellier cedex 05, France.
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Fleury E, Moal J, Boulo V, Daniel JY, Mazurais D, Hénaut A, Corporeau C, Boudry P, Favrel P, Huvet A. Microarray-based identification of gonad transcripts differentially expressed between lines of Pacific oyster selected to be resistant or susceptible to summer mortality. Mar Biotechnol (NY) 2010; 12:326-39. [PMID: 19813056 DOI: 10.1007/s10126-009-9227-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Accepted: 07/27/2009] [Indexed: 05/21/2023]
Abstract
Summer mortality of the Pacific oyster Crassostrea gigas is the result of a complex interaction between oysters, their environment, and pathogens. Heredity appears to be a major factor determining the sensitivity of oysters to summer mortality, allowing resistant (R) and susceptible (S) lines to be produced. We conducted genome-wide expression profiling of R and S gonads during the 3-month period preceding a summer mortality event, using a cDNA microarray that we designed. ANOVA analysis revealed that 34 genes were differentially expressed between R and S lines on four dates preceding the mortality event. Annotation of some of these genes highlights reproduction and its allocation and antioxidant defenses as the main pathways that operate differentially between R and S lines. This transcriptional analysis provides new indications to define markers for quantitative trait loci searches and functional studies and evaluate the potential role of each gene in the resistance to summer mortality.
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Affiliation(s)
- Elodie Fleury
- UMR M100 Ifremer- Université de Caen Basse Normandie "Physiologie et Ecophysiologie des Mollusques Marins", Centre de Brest, B.P. 70, 29280 Plouzané/IBFA, IFR ICORE 146, 14032 Caen, France
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Bodinier C, Boulo V, Lorin-Nebel C, Charmantier G. Influence of salinity on the localization and expression of the CFTR chloride channel in the ionocytes of Dicentrarchus labrax during ontogeny. J Anat 2010; 214:318-29. [PMID: 19245499 DOI: 10.1111/j.1469-7580.2009.01050.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The expression and localization of the cystic fibrosis transmembrane conductance regulator (CFTR) were determined in four osmoregulatory tissues during the ontogeny of the sea-bass Dicentrarchus labrax acclimated to fresh water and sea water. At hatch in sea water, immunolocalization showed an apical CFTR in the digestive tract and integumental ionocytes. During the ontogeny, although CFTR was consistently detected in the digestive tract, it shifted from the integument to the gills. In fresh water, CFTR was not present in the integument and the gills, suggesting the absence of chloride secretion. In the kidney, the CFTR expression was brief from D4 to D35, prior to the larva-juvenile transition. CFTR was apical in the renal tubules, suggesting a chloride secretion at both salinities, and it was basolateral only in sea water in the collecting ducts, suggesting chloride absorption. In the posterior intestine, CFTR was located differently from D4 depending on salinity. In sea water, the basolateral CFTR may facilitate ionic absorption, perhaps in relation to water uptake. In fresh water, CFTR was apical in the gut, suggesting chloride secretion. Increased osmoregulatory ability was acquired just before metamorphosis, which is followed by the sea-lagoon migration.
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Affiliation(s)
- Charlotte Bodinier
- Université Montpellier 2, UMR 5119-UM2-CNRS-IFREMER Ecolag, Equipe Adapatation Ecophysiologique et Ontogenèse, Montpellier Cedex 05, France. Charlotte.Bodinier@ univ-montp2.fr
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Fleury E, Huvet A, Lelong C, de Lorgeril J, Boulo V, Gueguen Y, Bachère E, Tanguy A, Moraga D, Fabioux C, Lindeque P, Shaw J, Reinhardt R, Prunet P, Davey G, Lapègue S, Sauvage C, Corporeau C, Moal J, Gavory F, Wincker P, Moreews F, Klopp C, Mathieu M, Boudry P, Favrel P. Generation and analysis of a 29,745 unique Expressed Sequence Tags from the Pacific oyster (Crassostrea gigas) assembled into a publicly accessible database: the GigasDatabase. BMC Genomics 2009; 10:341. [PMID: 19640306 PMCID: PMC2907693 DOI: 10.1186/1471-2164-10-341] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Accepted: 07/29/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although bivalves are among the most-studied marine organisms because of their ecological role and economic importance, very little information is available on the genome sequences of oyster species. This report documents three large-scale cDNA sequencing projects for the Pacific oyster Crassostrea gigas initiated to provide a large number of expressed sequence tags that were subsequently compiled in a publicly accessible database. This resource allowed for the identification of a large number of transcripts and provides valuable information for ongoing investigations of tissue-specific and stimulus-dependant gene expression patterns. These data are crucial for constructing comprehensive DNA microarrays, identifying single nucleotide polymorphisms and microsatellites in coding regions, and for identifying genes when the entire genome sequence of C. gigas becomes available. DESCRIPTION In the present paper, we report the production of 40,845 high-quality ESTs that identify 29,745 unique transcribed sequences consisting of 7,940 contigs and 21,805 singletons. All of these new sequences, together with existing public sequence data, have been compiled into a publicly-available Website http://public-contigbrowser.sigenae.org:9090/Crassostrea_gigas/index.html. Approximately 43% of the unique ESTs had significant matches against the SwissProt database and 27% were annotated using Gene Ontology terms. In addition, we identified a total of 208 in silico microsatellites from the ESTs, with 173 having sufficient flanking sequence for primer design. We also identified a total of 7,530 putative in silico, single-nucleotide polymorphisms using existing and newly-generated EST resources for the Pacific oyster. CONCLUSION A publicly-available database has been populated with 29,745 unique sequences for the Pacific oyster Crassostrea gigas. The database provides many tools to search cleaned and assembled ESTs. The user may input and submit several filters, such as protein or nucleotide hits, to select and download relevant elements. This database constitutes one of the most developed genomic resources accessible among Lophotrochozoans, an orphan clade of bilateral animals. These data will accelerate the development of both genomics and genetics in a commercially-important species with the highest annual, commercial production of any aquatic organism.
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Affiliation(s)
- Elodie Fleury
- UMR M100 Ifremer-Université de Caen Basse-Normandie Physiologie et Ecophysiologie des Mollusques Marins, Centre de Brest, B,P, 70, 29280 Plouzané/IBFA, IFR ICORE 146, Esplanade de la Paix, 14032 Caen Cedex, France.
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Giffard-Mena I, Lorin-Nebel C, Charmantier G, Castille R, Boulo V. Adaptation of the sea-bass (Dicentrarchus labrax) to fresh water: Role of aquaporins and Na+/K+-ATPases. Comp Biochem Physiol A Mol Integr Physiol 2008; 150:332-8. [DOI: 10.1016/j.cbpa.2008.04.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Revised: 04/01/2008] [Accepted: 04/02/2008] [Indexed: 01/10/2023]
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Charmantier G, Mena IG, Abed C, Boulo V, Bodinier C, Sucré E, Lorin-Nebel C, Castille R, Cucchi-Mouillot P, Cramb G. The role of the gut in hydromineral balance during the ontogeny of the sea bass Dicentrarchus labrax. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Bodinier C, Boulo V, Lorin‐Nebel C, Charmantier G. Influence of salinity on the localization and expression of the CFTR chloride channel in the ionocytes of the European sea‐bass
Dicentrarchus labrax
during ontogeny. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.933.2] [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: 11/11/2022]
Affiliation(s)
- Charlotte Bodinier
- Equipe AEOUMR 5119‐UM2‐CNRS‐IFREMERECOLAGUniversité montpellier 2MontpellierFrance
| | - Viviane Boulo
- Equipe RIAEUMR 5119‐UM2‐CNRS‐IFREMERECOLAGIFREMERMontpellierFrance
| | | | - Guy Charmantier
- Equipe AEOUMR 5119‐UM2‐CNRS‐IFREMERECOLAGUniversité montpellier 2MontpellierFrance
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Giffard‐Mena I, Boulo V, Lorin‐Nebel C, Castille R, Charmantier G. Renal dysfunction and water channels in fresh water unadapted European sea‐bass (
Dicentrarchus labrax
). FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.933.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ivone Giffard‐Mena
- Equpie AEOUMR5119‐UM2‐CNRS‐IFREMERECOLAGUniversité Montpellier 2MontpellierFrance
| | - Viviane Boulo
- Equipe RIAEUMR5119‐UM2‐CNRS‐IFREMERECOLAGIFREMERMontpellierFrance
| | | | - René Castille
- Equpie AEOUMR5119‐UM2‐CNRS‐IFREMERECOLAGUniversité Montpellier 2MontpellierFrance
| | - Guy Charmantier
- Equpie AEOUMR5119‐UM2‐CNRS‐IFREMERECOLAGUniversité Montpellier 2MontpellierFrance
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Tanguy A, Bierne N, Saavedra C, Pina B, Bachère E, Kube M, Bazin E, Bonhomme F, Boudry P, Boulo V, Boutet I, Cancela L, Dossat C, Favrel P, Huvet A, Jarque S, Jollivet D, Klages S, Lapègue S, Leite R, Moal J, Moraga D, Reinhardt R, Samain JF, Zouros E, Canario A. Increasing genomic information in bivalves through new EST collections in four species: Development of new genetic markers for environmental studies and genome evolution. Gene 2008; 408:27-36. [DOI: 10.1016/j.gene.2007.10.021] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Revised: 10/05/2007] [Accepted: 10/13/2007] [Indexed: 10/22/2022]
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Jenny MJ, Chapman RW, Mancia A, Chen YA, McKillen DJ, Trent H, Lang P, Escoubas JM, Bachere E, Boulo V, Liu ZJ, Gross PS, Cunningham C, Cupit PM, Tanguy A, Guo X, Moraga D, Boutet I, Huvet A, De Guise S, Almeida JS, Warr GW. A cDNA microarray for Crassostrea virginica and C. gigas. Mar Biotechnol (NY) 2007; 9:577-91. [PMID: 17668266 DOI: 10.1007/s10126-007-9041-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Accepted: 03/23/2007] [Indexed: 05/16/2023]
Abstract
The eastern oyster, Crassostrea virginica, and the Pacific oyster, C. gigas, are species of global economic significance as well as important components of estuarine ecosystems and models for genetic and environmental studies. To enhance the molecular tools available for oyster research, an international group of collaborators has constructed a 27,496-feature cDNA microarray containing 4460 sequences derived from C. virginica, 2320 from C. gigas, and 16 non-oyster DNAs serving as positive and negative controls. The performance of the array was assessed by gene expression profiling using gill and digestive gland RNA derived from both C. gigas and C. virginica, and digestive gland RNA from C. ariakensis. The utility of the microarray for detection of homologous genes by cross-hybridization between species was also assessed and the correlation between hybridization intensity and sequence homology for selected genes determined. The oyster cDNA microarray is publicly available to the research community on a cost-recovery basis.
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Giffard-Mena I, Boulo V, Aujoulat F, Fowden H, Castille R, Charmantier G, Cramb G. Aquaporin molecular characterization in the sea-bass (Dicentrarchus labrax): the effect of salinity on AQP1 and AQP3 expression. Comp Biochem Physiol A Mol Integr Physiol 2007; 148:430-44. [PMID: 17618150 DOI: 10.1016/j.cbpa.2007.06.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 06/04/2007] [Accepted: 06/05/2007] [Indexed: 12/20/2022]
Abstract
Euryhaline fish possess the ability to compensate for environmental salinity changes through hydro-mineral regulation. A number of proteins have been studied in order to understand water and ion exchanges, known as fish osmoregulation. Sea-bass (Dicentrarchus labrax) cDNA sequences encoding a homologue of mammalian aquaporin (termed AQP1) and a homologue of mammalian aquaglyceroporin (termed AQP3) have been isolated and sequenced. The aquaporin amino acid sequences share respectively more than 60% and 65% identity with other known aquaporins. We have shown that salinity influences aquaporin expression levels in the gill, kidney and digestive tract, the main osmoregulatory organs. AQP1 may have a major osmoregulatory role in water transport in kidney and gut in SW-acclimated fish, whereas AQP3 could be implicated in gill water transport in FW-acclimated fish.
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Affiliation(s)
- Ivone Giffard-Mena
- AEO team, UMR 5119 Ecolag, Université Montpellier II, Montpellier Cedex 05, 34095, France.
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Lorin-Nebel C, Boulo V, Bodinier C, Charmantier G. The Na+/K+/2Cl- cotransporter in the sea bass Dicentrarchus labrax during ontogeny: involvement in osmoregulation. ACTA ACUST UNITED AC 2007; 209:4908-22. [PMID: 17142680 DOI: 10.1242/jeb.02591] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This study combines a cellular and molecular analysis of the Na(+)/K(+)/2Cl(-) cotransporter (NKCC) to determine the osmoregulatory role of this protein in different tissues during the ontogeny of the sea bass. We have characterized the complete sequence of the NKCC1 isoform isolated from the sea bass gills and have identified, by immunofluorescence, NKCC1, and other isoforms, within the epithelium of the major osmoregulatory organs. Different (absorptive and secretory) functions have been attributed to this protein according to the tissue and salinity. The effects of short- (1-4 days), medium- (7-21 days) and long (6 months)-term freshwater (FW) adaptations were investigated, in comparison with seawater (SW)-maintained sea bass. In adult sea bass after long-term adaptation to FW and SW, the gills had the highest expression of NKCC mRNA compared with the median/posterior kidney and to the posterior intestine. Expression of NKCC mRNA in the kidney was 95% (SW) and 63% (FW) lower, and in the intestine 98% (SW) and 77% (FW) lower. Compared to SW-maintained sea bass, long-term FW adaptation induced a significant 5.6-fold decrease in the branchial NKCC gene expression whereas the intestinal and renal expressions did not vary significantly. The cells of the intestine and collecting ducts as well as a part of the epithelium lining the urinary bladder expressed NKCC apically. Within the gill chloride cells, NKCC was found basolaterally in SW-acclimated fish; some apically stained cells were detected after 7 days of FW exposure and their relative number increased progressively following FW acclimation. The appearance of FW-type chloride cells induces a functional shift of the gills from a secretory to an absorptive epithelium, which was only completed after long-term exposure to FW. Short- and medium-term exposure to FW induced a progressive decrease in total NKCC content and an increase in functionally different branchial chloride cells. During development, the cotransporter was already expressed in tegumentary ionocytes and along the digestive tract of late embryos. NKCC was recorded in the branchial chamber and along the renal collecting ducts in prelarvae and also in the dorsal part of the urinary bladder in larvae. The expression of NKCC along the osmoregulatory epithelial cells and the presence of Na(+)/K(+)-ATPase within these cells contribute to the increase of the osmoregulatory capacity during sea bass ontogeny.
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Affiliation(s)
- Catherine Lorin-Nebel
- Equipe Adaptation Ecophysiologique et Ontogenèse, UMR 5171 UM2-CNRS-IFREMER Génome Populations Interactions Adaptation, Université Montpellier II, cc 092, Place E. Bataillon, 34095 Montpellier cedex 05, France.
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Tirapé A, Bacque C, Brizard R, Vandenbulcke F, Boulo V. Expression of immune-related genes in the oyster Crassostrea gigas during ontogenesis. Dev Comp Immunol 2007; 31:859-73. [PMID: 17337052 DOI: 10.1016/j.dci.2007.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2006] [Revised: 01/03/2007] [Accepted: 01/03/2007] [Indexed: 05/14/2023]
Abstract
The work presented here reports the expression of immune-related genes during ontogenesis in the oyster Crassostrea gigas. Expression patterns of 18 selected genes showed that RNAs detected in oocytes and 2-4 cell embryos are of maternal origin and that gene transcription starts early after fertilization. The expression patterns of 4 genes (Cg-timp, Cg-tal, Cg-EcSOD and Drac3) suggested that hemocytes appear in the gastrula-trochophore stages. The localization of Cg-tal expression suggested that hematopoietic cells were derived from vessels and/or artery endothelia cells. Moreover, a bacterial challenge affected the level of expression of genes. Indeed, a change in expression levels was observed for Cg-LBP/BPI, Cg-timp, Drac3 and Cg-MyD88 genes in larval stages upon exposure to non-pathogenic bacteria. In early juveniles, a modulation was also observed for Cg-LBP/BPI, Cg-timp, Cg-MyD88 and for Cg-tal, according to the concentration of bacteria. Altogether, the results showed that studying the appearance of immunocompetent cells through their ability to express immune-related genes is a tool to gain insight the ontogenesis of the oyster immune system.
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Affiliation(s)
- Ana Tirapé
- UMR5171, IFREMER, CNRS, UMII, Génome Populations Interactions Adaptation (GPIA), Université de Montpellier II, 2 Place Eugène Bataillon, CC80, 34095 Montpellier Cedex 5, France
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29
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Montagnani C, Avarre JC, de Lorgeril J, Quiquand M, Boulo V, Escoubas JM. First evidence of the activation of Cg-timp, an immune response component of Pacific oysters, through a damage-associated molecular pattern pathway. Dev Comp Immunol 2007; 31:1-11. [PMID: 16793134 DOI: 10.1016/j.dci.2006.04.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 03/29/2006] [Accepted: 04/09/2006] [Indexed: 05/10/2023]
Abstract
In a previous work, we characterized a Crassostrea gigas cDNA (Cg-timp) encoding a protein which presents all the features of vertebrate tissue inhibitor of metalloproteinase (TIMP). The expression pattern of this gene led us to propose that Cg-timp is an important factor in oyster wound healing and defense mechanisms. Here we describe the analysis of Cg-timp expression in oysters challenged by live or dead bacteria as well as by bacterial secretory/excretory products and metalloproteinase. Surprisingly, bacterial secretory/excretory products activate Cg-timp gene expression whereas heat-inactivated ones do not. To address the question of the signal transduction pathway involved in Cg-timp gene activation, we isolated and sequenced Cg-timp promoter and upstream region. A 1-kb genomic DNA fragment flanking the 5'-end of the gene contains several regulatory elements and notably three NF-kappaB binding sites. The potential involvement of these motifs in Cg-timp gene regulation is discussed.
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Affiliation(s)
- C Montagnani
- Génome, Populations, Interactions, Adaptation (GPIA), UMR5171 (IFREMER, CNRS, UMII) Université de Montpellier II, place Eugène Bataillon, CC80, 34095 Montpellier, France
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30
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Labreuche Y, Lambert C, Soudant P, Boulo V, Huvet A, Nicolas JL. Cellular and molecular hemocyte responses of the Pacific oyster, Crassostrea gigas, following bacterial infection with Vibrio aestuarianus strain 01/32. Microbes Infect 2006; 8:2715-24. [PMID: 16978900 DOI: 10.1016/j.micinf.2006.07.020] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2005] [Revised: 07/12/2006] [Accepted: 07/31/2006] [Indexed: 11/28/2022]
Abstract
The strategies used by bacterial pathogens to circumvent host defense mechanisms remain largely undefined in bivalve molluscs. In this study, we investigated experimentally the interactions between the Pacific oyster (Crassostrea gigas) immune system and Vibrio aestuarianus strain 01/32, a pathogenic bacterium originally isolated from moribund oysters. First, an antibiotic-resistant V. aestuarianus strain was used to demonstrate that only a limited number of bacterial cells was detected in the host circulatory system, suggesting that the bacteria may localize in some organs. Second, we examined the host defense responses to V. aestuarianus at the cellular and molecular levels, using flow-cytometry and real-time PCR techniques. We showed that hemocyte phagocytosis and adhesive capabilities were affected during the course of infection. Our results also uncovered a previously-undescribed mechanism used by a Vibrio in the initial stages of host interaction: deregulation of the hemocyte oxidative metabolism by enhancing the production of reactive oxygen species and down-regulating superoxide dismutase (Cg-EcSOD) gene expression. This deregulation may provide an opportunity to the pathogen by impairing hemocyte functions and survival. These findings provide new insights into the cellular and molecular bases of the host-pathogen interactions in C. gigas oyster.
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Affiliation(s)
- Yannick Labreuche
- Unité Mixte de Recherche Physiologie et Ecophysiologie des Mollusques Marins (UMR 100), IFREMER, Centre de Brest, B.P. 70, 29280 Plouzané, France
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Montagnani C, Tirape A, Boulo V, Escoubas JM. The two Cg-timp mRNAs expressed in oyster hemocytes are generated by two gene families and differentially expressed during ontogenesis. Dev Comp Immunol 2005; 29:831-9. [PMID: 15978280 DOI: 10.1016/j.dci.2005.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Revised: 02/22/2005] [Accepted: 02/28/2005] [Indexed: 05/03/2023]
Abstract
We previously characterized a Crassostrea gigas tissue inhibitor of metalloproteinase (Cg-timp 1.3) with potential role in wound healing and defense mechanisms. Here we isolated a second cDNA (Cg-timp 1.1) encoding a protein that contains the characteristic signature of TIMP proteins. Sequence analysis of the two transcripts showed that they originate from two distinct genes. The two proteins, Cg-TIMP 1.1 and 1.3, are closely related and share 81% identity. Northern blot analysis of Cg-timp gene expression in adult oyster hemocytes indicated that the ratio between the two transcripts was constant from one oyster to another (Cg-timp 1.1 and 1.3 represent 32 and 68%, respectively). Conversely, during ontogenesis the expression pattern of the two Cg-timp genes was different. Indeed, Cg-timp 1.3 mRNAs were detected from the larval D stage whereas Cg-timp 1.1 transcripts were undetectable up to 22 days post-fertilization. The difference in expression pattern of the two Cg-timp genes may reveal distinct implications of these genes in the embryos and larvae developments.
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Affiliation(s)
- Caroline Montagnani
- Génome, Populations, Interactions, Adaptation (GPIA), UMR5171 (IFREMER, CNRS, UMII) Université de Montpellier II, place Eugène Bataillon, CC80, 34095 Montpellier, France
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Rincheval V, Renaud F, Lemaire C, Godefroy N, Trotot P, Boulo V, Mignotte B, Vayssière JL. Bcl-2 can promote p53-dependent senescence versus apoptosis without affecting the G1/S transition. Biochem Biophys Res Commun 2002; 298:282-8. [PMID: 12387829 DOI: 10.1016/s0006-291x(02)02454-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
With the aim to identify events involved in the determination of p53-dependent apoptosis versus growth arrest, we used rat embryo fibroblasts expressing a temperature-sensitive mutant (tsA58) of the SV40 large tumour antigen (LT). Heat-inactivation of LT leads to p53 activation and commitment to a senescent-like state (REtsA15 cell line) or apoptosis (REtsAF cell line). We report that senescence is associated with high levels of the anti-apoptotic Bcl-2 protein and a cell cycle arrest in G1 phase, whereas apoptosis is associated with low levels of Bcl-2 and a cell cycle arrest in G2 phase. Here we show that Bcl-2, which can inhibit apoptosis and proliferation, turns the apoptotic phenotype into a senescent-like phenotype in G2 phase. This result suggests that Bcl-2-dependent inhibition of apoptosis could be crucial for the commitment to replicative senescence, whereas its ability to inhibit G1 progression would not be required.
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Affiliation(s)
- Vincent Rincheval
- Laboratoire de génétique et biologie cellulaire, Université de Versailles/St. Quentin-en-Yvelines, UPRESA-CNRS 8087, 45 avenue des Etats-Unis, Versailles cedex 78035, France
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Boulo V, Cadoret JP, Shike H, Shimizu C, Miyanohara A, Burns JC. Infection of cultured embryo cells of the pacific oyster, Crassostrea gigas, by pantropic retroviral vectors. In Vitro Cell Dev Biol Anim 2000; 36:395-9. [PMID: 10949999 DOI: 10.1290/1071-2690(2000)036<0395:ioceco>2.0.co;2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The inability to stably introduce and express foreign genes has hampered basic research in molluscan species. We cultured cells from dissociated embryos of the Pacific oyster, Crassostrea gigas, and infected these primary cultures with pantropic retroviral vectors containing the envelope glycoprotein of vesicular stomatitis virus. Luciferase transgene expression mediated by different heterologous promoters was demonstrated for at least 9 d after infection of the cells. Surprisingly, the promoter reproducibly mediating the highest level of luciferase expression was the retroviral promoter (U3 region of long terminal repeat) from the Moloney murine leukemia virus. The infection efficiency using a low multiplicity of infection (0.05) was estimated by quantitative polymerase chain reaction to be between 0.1-0.5%. This system will facilitate studies of gene expression and regulation and should be widely applicable to other molluscan species.
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Affiliation(s)
- V Boulo
- IFREMER-CNRS, Universite Montpellier II, Defense et Resistance chez les Invertebres Marins, France.
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Cadoret JP, Debón R, Cornudella L, Lardans V, Morvan A, Roch P, Boulo V. Transient expression assays with the proximal promoter of a newly characterized actin gene from the oyster Crassostrea gigas. FEBS Lett 1999; 460:81-5. [PMID: 10571065 DOI: 10.1016/s0014-5793(99)01319-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We undertook the characterization of an actin gene and its proximal promoter in the oyster Crassostrea gigas. A complete actin cDNA was identified, sequenced and its amino acid sequence deduced. Comparative analysis showed a high homology with actin of other species and that this gene is closer to the cytoplasmic form of actins than to the muscle type. A probe derived from the 5'-untranslated region of the cDNA was then used to isolate the actin gene from a genomic library. The gene was sequenced and shown to contain a single 643 bp intron. A 1670 bp fragment upstream from the open reading frame was isolated and sequenced. This upstream region displays typical features of actins such as a serum response element (CarG box). This fragment was cloned into the promoterless vector pGL3-basic and the resulting construct was transfected into cells of dissociated oyster heart primary cultures. Its capacity to express the luciferase in this in vitro homologous system was monitored and showed high expression levels. This is the first complete actin sequence reported so far for the oyster C. gigas and its promoter is the first available among bivalves.
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Affiliation(s)
- J P Cadoret
- Défense et Résistance chez les Invertébrés Marins, IFREMER-CNRS-Université de Montpellier II, France.
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Le Marrec-Croq F, Glaise D, Guguen-Guillouzo C, Chesne C, Guillouzo A, Boulo V, Dorange G. Primary cultures of heart cells from the scallop Pecten maximus (mollusca-bivalvia). In Vitro Cell Dev Biol Anim 1999; 35:289-95. [PMID: 10475275 DOI: 10.1007/s11626-999-0073-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Primary cultures of Pecten maximus heart cells, isolated by an enzymatic procedure, were routinely obtained with a high level of reproducibility in a simple medium based on sterile seawater. Cells attached to the plastic substratum without the need to add a special factor. The number of adhering cells gradually increased with the time of culture. Two types of adhering cells were observed: epitheliallike cells and fibroblastlike cells, which were more numerous. The latter cells were identified as myocytes by electron microscopy and immunofluorescent staining. Results obtained by autoradiography, after incorporation of [14C]leucine, [3H]thymidine, and [14C]acetate, confirmed functional activity of the cells. These cultures were maintained viable in vitro during at least 1 mo.
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Affiliation(s)
- F Le Marrec-Croq
- Unité de Culture cellulaire, Université de Bretagne Occidentale, Brest, France
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36
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Jordan TV, Shike H, Boulo V, Cedeno V, Fang Q, Davis BS, Jacobs-Lorena M, Higgs S, Fryxell KJ, Burns JC. Pantropic retroviral vectors mediate somatic cell transformation and expression of foreign genes in dipteran insects. Insect Mol Biol 1998; 7:215-222. [PMID: 9662470 DOI: 10.1111/j.1365-2583.1998.00063.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The control of insects that transmit disease and damage crops has become increasingly difficult. The ability to genetically engineer insects would facilitate strategies to protect crops and block arthropod vector-borne disease transmission. Transformation vectors based on insect transposable elements have been developed, but most have limited host ranges. A promising alternative is the pantropic retroviral vector, which is packaged with the envelope glycoprotein from vesicular stomatitis virus and is replication-defective. We show here that pantropic murine retroviral vectors can mediate high-level expression of foreign genes in somatically transformed insect larvae and adults of three dipteran genera. This success demonstrates the potential for germline transformation mediated by pantropic retroviral vectors.
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Affiliation(s)
- T V Jordan
- Department of Biology, University of California, Riverside, USA
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37
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Cadoret JP, Boulo V, Gendreau S, Mialhe E. Promoters from Drosophila heat shock protein and cytomegalovirus drive transient expression of luciferase introduced by particle bombardment into embryos of the oyster Crassostrea gigas. J Biotechnol 1997; 56:183-9. [PMID: 9304877 DOI: 10.1016/s0168-1656(97)00118-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Using high velocity particle bombardment, we transferred a reporter gene into early stages of the oyster Crassostrea gigas and showed the expression of the introduced genes in these embryos at later stages of development. We tested two promoters: (1) the heat shock protein 70 promoter of Drosophila; (2) the cytomegalovirus early promoter, both linked to the luciferase reporter gene. The hsp 70-luc (pDrluc) construct allowed an expression level up to 55-fold higher than the control in a heat inducible fashion. The CMV-luc (pCMVL) construct constitutively gave a 4-fold higher expression than the control. This confirms the suitability of particle bombardment for transfecting genes into eggs, zygotes and trochopores of bivalves and demonstrates the functionality of two heterologous expression vectors in C. gigas.
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Affiliation(s)
- J P Cadoret
- Défense et Résistance chez les Invertébrés Marins (DRIM)-Université de Montpellier II-C, Montpellier, France
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38
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Boulo V, Cadoret JP, Le Marrec F, Dorange G, Miahle E. Transient expression of luciferase reporter gene after lipofection in oyster (Crassostrea gigas) primary cell cultures. Mol Mar Biol Biotechnol 1996; 5:167-74. [PMID: 8817924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Transient expression of the luciferase gene, under transcriptional control of several heterologous promoters, was obtained in heart primary cell cultures of the Pacific oyster, Crassostrea gigas. Drosophila heat shock protein 70 promoter (hsp70), cytomegalovirus, and simian virus early promoters, controlling the luciferase gene, were transfected into the cell cultures using liposomes. Two culture media were used to establish primary cell cultures and tested as transfection media. Parameters such as the quantity of DNA and the ratio of DNA to liposome were analyzed to define the best transfection conditions. In oysters, the Drosophila inducible hsp70 promoter behaved in a way similar to that observed in other animal species. Moreover, for this study, hsp70 was more efficient than the cytomegalovirus and simian virus promoters.
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Affiliation(s)
- V Boulo
- IFREMER-CNRS-UM2, UMR 219, Défense et Résistance chez les Invertébrés Marins, Montpellier, France
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39
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Lardans V, Boulo V, Duclermortier P, Serra E, Mialhe E, Capron A, Dissous C. DNA transfer in a Biomphalaria glabrata embryonic cell line by DOTAP lipofection. Parasitol Res 1996; 82:574-6. [PMID: 8832743 DOI: 10.1007/s004360050166] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- V Lardans
- Pasteur Institute CIBP, Lille, France
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40
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Mialhe E, Bachere E, Boulo V, Cadoret JP, Rousseau C, Cedeño V, Saraiva E, Carrera L, Calderon J, Colwell RR. Future of biotechnology-based control of disease in marine invertebrates. Mol Mar Biol Biotechnol 1995; 4:275-83. [PMID: 8541979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Infectious disease is the single most devastating problem in mollusc and shrimp aquaculture. Pathogens causing the greatest problems have been identified as viruses, prokaryotes, and protozoans. Two approaches employing methods of biotechnology have been proposed to prevent, manage, and control mollusc and shrimp diseases. The first is development of a diagnostic scheme for detection and identification of pathogens, using molecular probes. This offers the opportunity for prophylactic measures to be taken. Molecular probes have been prepared for the major pathogens of molluscs, but in the case of shrimp pathogens, only a few are available. Monoclonal antibodies have also been prepared and are used in immunodiagnosis, e.g., immunofluorescence detection. Such diagnostic tools are relatively new to aquaculture, but have enormous potential. A second approach to the control of disease in marine invertebrates, notably shrimp, involves use of genetically transformed strains resistant to specific pathogens. Pathogen-resistant transgenic animals have been developed, but such research has only just begun for molluscs and shrimp. Transfection methods applied to mollusc and shrimp embryos have been successful, with preliminary data showing efficiency of heterologous promoters in controlling expression of reporter genes. Other transformation systems also show promise, including transposable elements and densoviruses.
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Affiliation(s)
- E Mialhe
- IFREMER, Universite de Montpellier, France
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41
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Abstract
Various haemolymph components of the shrimp Penaeus japonicus were identified and characterised by monoclonal antibodies. Three groups of monoclonal antibodies were raised. Their reactivity to haemocyte types and/or secreted molecules was determined by immunofluorescence and the molecular masses of the antigens were analysed by western-blotting. A 170 kDa protein, in reducing conditions, was recognized by four panhaemocytic monoclonal antibodies from group 1. This protein was present both in the plasma and in the haemocytes from which it appears to be secreted. The shrimp haemocytes were separated by isopycnic centrifugation on a Percoll gradient and the different subpopulations were antigenically analysed using the two monoclonal antibodies, 40E2-2A and 40E10-2B, from group 2. The granular cells were labelled by 40E2-2A which was specific for a protein of 142 kDa also present in plasma. By comparison, the 40E10-2B monoclonal antibody was assumed to be the marker for small hyaline and semigranular cells since the granular ones were not labelled. Moreover, the antigen immunoprecipitated by this monoclonal antibody was shown to have different molecular masses of 250, 150, 66 and 27 kDa under nonreducing conditions. It appeared to be secreted by the haemocytes. Some plasma proteins were recognized by the third group of monoclonal antibodies. The antibodies, designated 41D11-3A, 42C11-3B and 42E8-3C, all immunoprecipitated a protein with an apparent molecular mass of 180 kDa under reduced conditions. The 44E6-3D antibody was specific for a 75 kDa protein under reduced conditions and was shown to be immunoreactive against P. japonicus haemocyanin extract.(ABSTRACT TRUNCATED AT 250 WORDS)
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Kellner-Cousin K, Boulo V, Lacroix I, Mialhe E, Mathieu M. Use of monoclonal antibodies for identification of growth-controlling neuropeptides in the mussel Mytilus edulis (Mollusca:Bivalvia). Comp Biochem Physiol A Physiol 1994; 109:689-98. [PMID: 8529010 DOI: 10.1016/0300-9629(94)90211-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Monoclonal antibodies were developed against cerebral ganglia (CG) of the mussel Mytilus edulis by the immunization of mice with unpurified homogenates of these organs. The screening protocol of hybridoma was based upon immunohistological observations of cytocentrifugated ganglia cells. A panel of 29 monoclonal antibodies (MABs) specific of CG epitopes was harvested and subsequently used for the immunocytochemical study of CG cells. Several subpopulations of ganglia cells were specifically revealed by MABs. Identification of epitopes involved in growth control was approached via the application of a bioassay allowing the assessment of protein synthesis stimulation. MAB 42 and 46 affected amino acid incorporation induced by CG extract. These results lead to the conclusion that the epitopes recognised by these antibodies are involved in growth control. An immunoenzymatic assay was performed with CG extracts for quantitative analyses of epitopes.
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Affiliation(s)
- K Kellner-Cousin
- Laboratoire de Biologie et Biotechnologies marines, IBBA, Esplanade de la Paix, Caen, France
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Chagot D, Boulo V, Hervio D, Mialhe E, Bachere E, Mourton C, Grizel H. Interactions between Bonamia ostreae (Protozoa: Ascetospora) and hemocytes of Ostrea edulis and Crassostrea gigas (Mollusca: Bivalvia): Entry mechanisms. J Invertebr Pathol 1992. [DOI: 10.1016/0022-2011(92)90128-q] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mourton C, Boulo V, Chagot D, Hervio D, Bachere E, Mialhe E, Grizel H. Interactions between Bonamia ostreae (Protozoa: Ascetospora) and hemocytes of Ostrea edulis and Crassostrea gigas (Mollusca: Bivalvia): in vitro system establishment. J Invertebr Pathol 1992. [DOI: 10.1016/0022-2011(92)90127-p] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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