Article
Environmental Sciences
Zaiming Han, Taifeng Jiang, Liping Xie, Rongqing Zhang
Summary: The study found that high abundance of microplastics in the ocean negatively affects the formation of shells and pearls, while low-quality round pearls contain less microplastics. During the biomineralization process of bivalves, microplastics become embedded in shells and increase the expression of biomineralization-related genes.
ENVIRONMENTAL POLLUTION
(2022)
Article
Genetics & Heredity
Carmel McDougall, Felipe Aguilera, Ali Shokoohmand, Patrick Moase, Bernard M. Degnan
Summary: Research shows that differential gene expression in pearl sacs correlates with pearl defects, indicating that gene regulation in the pearl sac influences the appearance and quality of pearls. This suggests that gene expression profiling can enhance our understanding of biomineralization processes, offering potential benefits for the pearl industry in addressing defects that lead to low value pearls.
FRONTIERS IN GENETICS
(2021)
Article
Immunology
Hailing Wu, Chuangye Yang, Ruijuan Hao, Yongshan Liao, Qingheng Wang, Yuewen Deng
Summary: Lipidomic analysis revealed the important roles of lipids in immune response, pearl sac maturation, and pearl formation in pearl oysters after transplantation, which may enhance the survival rate and quality of transplanted pearl oysters.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Fisheries
Zefeng Gu, Jingmiao Yang, Min Yang, Yuewen Deng, Yu Jiao
Summary: This study evaluated the effect of DAC on DNA methylation and the immune system of pearl oysters. The results showed that DAC decreased global DNA methylation level and activated immune-related genes, leading to an improvement in humoral immunity. These findings contribute to a better understanding of the mechanism underlying DNA methylation in immune regulation.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Article
Food Science & Technology
Tomoki Omachi, Nao Matsuyama, Yasushi Hasegawa
Summary: Pearl oyster shell extract (nacre extract) has beneficial effects in LPS-induced depression and anxiety in mice by improving behavior, preventing oxidative stress, and regulating receptor expression. It also restores the expression of BDNF.
JOURNAL OF FUNCTIONAL FOODS
(2023)
Article
Food Science & Technology
Yongxin Yu, Feng Han, Mingshu Yang, Xiaoya Zhang, Yunfei Chen, Mingxia Yu, Yongjie Wang
Summary: Oysters are important vectors for human norovirus transmission in the environment. This study found that certain bacteria in oyster digestive tissues can specifically bind with certain norovirus genotypes, contributing to a better understanding of norovirus transmission and enrichment in the environment.
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
(2023)
Article
Fisheries
Pranesh Kishore, Max Wingfield, Thane A. Militz, Tracy Aisea, Paul C. Southgate
Summary: Using appropriate anaesthetics can reduce stress and mortality in pearl oysters during nucleus implanting. This study evaluated the efficacy of benzocaine and 1-propylene phenoxetol in winged pearl oysters and found that higher concentrations of anaesthetics resulted in faster relaxation and increased success rate. However, it also caused mantle collapse in large oysters.
AQUACULTURE REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Jingliang Huang, Yangjia Liu, Chuang Liu, Liping Xie, Rongqing Zhang
Summary: In pearl oysters, the prismatic layer consists of polygonal prisms enveloped by organic matrices that are heterogeneously distributed, with highly acidic fractions inside the prisms columns and basic fractions as inter-column framework. The organic matrices are enriched in specific amino acids, influencing the matrix's properties. Proteomics data reveals a role of electric charge and hydrophobic effect in matrix heterogeneity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Biochemistry & Molecular Biology
Mahendra Rai, Magdalena Wypij, Avinash P. Ingle, Joanna Trzcinska-Wencel, Patrycja Golinska
Summary: Pullulan, an important biodegradable polymer, plays a key role in combating multidrug-resistant pathogens. It possesses various activities against bacteria, fungi, viruses, and tumor cells, can synthesize biogenic silver nanoparticles, and is used in wound healing, food packaging, etc., serving as a natural alternative solution.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Fisheries
Hua Zhang, Gaoyou Yao, Maoxian He
Summary: In this study, a novel long noncoding RNA (lncRNA7467) was identified from the pearl oyster. The lncRNA showed the highest expression in mantle tissue and was involved in the biomineralization process.
AQUACULTURE REPORTS
(2022)
Article
Environmental Sciences
Haijun Wei, Mingqiang Chen, Zhenghua Deng, Jing Sun, Jingru Yang, Wang Zhao, Youning Li, Zhenhua Ma, Yu Wang, Gang Yu
Summary: This study investigated the molecular changes in pearl oysters in response to acute salinity stress. The researchers identified differentially expressed genes and explored their potential functions in relation to membrane transport and immune response. The findings contribute to our understanding of how pearl oysters adapt to salinity stress.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Chemistry, Applied
Giulia Bisson, Clara Comuzzi, Elisa Giordani, Denise Poletti, Marta Boaro, Marilena Marino
Summary: This study characterized the chemical and biological properties of an exopolysaccharide EPS_B3 produced by Leuconostoc mesenteroides strain isolated from an Italian cheese. The EPS_B3 displayed antimicrobial, antibiofilm, bifidogenic, antioxidant, and DNA-protective activities. It showed potential applications in functional foods, especially for its antimicrobial activity and ability to improve the viability of bifidobacteria in probiotic foods. Further research is needed to assess its ability to reach the gastrointestinal tract intact.
CARBOHYDRATE POLYMERS
(2023)
Article
Environmental Sciences
Steve Whalan, Marji Puotinen, Mary Wakeford, Iain Parnum, Karen Miller
Summary: By using image-based and acoustic methods, researchers elucidated the distribution patterns of Pinctada maxima off Eighty Mile Beach in Western Australia. Results showed that these pearl oysters mainly inhabit flat, sandy habitats at depths shallower than 40 meters, with neighboring benthic communities predominantly composed of filter feeders.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Zhe Zheng, Yongshan Liao, Jianming Ye, Chuangye Yang, Linda Adzigbli, Qingheng Wang, Xiaodong Du, Yuewen Deng
Summary: The richness and diversity of pearl oyster intestinal microbiota are lower than those of surrounding water, but functionally similar. The bacterial communities in pearl oyster intestines show adaptability at the phylum and genus levels.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Chuangye Yang, Ruijuan Hao, Chengzhang He, Yuewen Deng, Qingheng Wang
Summary: This study characterized the FAD gene in P. f. martensii and found that Pm Delta 5FAD plays an important role in regulating inflammation. Functional analysis showed that Pm Delta 5FAD has Delta 5-desaturation activity towards PUFA substrates and its expression level significantly increases on day 1 after grafting operation.
AQUACULTURE REPORTS
(2022)
Review
Fisheries
Vivien Hulot, Denis Saulnier, Celine Lafabrie, Nabila Gaertner-Mazouni
REVIEWS IN AQUACULTURE
(2020)
Article
Biotechnology & Applied Microbiology
Mayalen Zubia, Olivier P. Thomas, Stephanie Soulet, Marina Demoy-Schneider, Denis Saulnier, Solene Connan, Elliot C. Murphy, Florent Tintillier, Valerie Stiger-Pouvreau, Sylvain Petek
JOURNAL OF APPLIED PHYCOLOGY
(2020)
Article
Fisheries
Jean-Pierre Cuif, Yannicke Dauphin, Gilles Luquet, Oulfa Belhadj, Stephan Rouziere, Murielle Salome, Marine Cotte, Andrea Somogyi, Kadda Medjoubi, Cedrik Lo, Denis Saulnier
AQUACULTURE RESEARCH
(2020)
Article
Microbiology
Jean Delmotte, Cristian Chaparro, Richard Galinier, Julien de Lorgeril, Bruno Petton, Pierre-Louis Stenger, Jeremie Vidal-Dupiol, Delphine Destoumieux-Garzon, Yannick Gueguen, Caroline Montagnani, Jean-Michel Escoubas, Guillaume Mitta
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Environmental Sciences
Marion Richard, Jean Luc Rolland, Yannick Gueguen, Julien de Lorgeril, Juliette Pouzadoux, Behzad Mostajir, Beatrice Bec, Sebastien Mas, David Parin, Patrik Le Gall, Serge Mortreux, Annie Fiandrino, Franck Lagarde, Gregory Messiaen, Martine Fortune, Emmanuelle Roque D'Orbcastel
Summary: The mortality of Crassostrea gigas juveniles is systematically observed every year worldwide, primarily due to Pacific Oyster Mortality Syndrome (POMS) caused by OsHV-1 infection. During the oyster mortality episode, releases of OsHV-1 and opportunistic bacteria were observed in the water, potentially impacting disease spread within oyster farms and marine biodiversity in shellfish farming areas.
MARINE ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Biomedical
Julien Duboisset, Patrick Ferrand, Arthur Baroni, Tilman A. Grunewald, Hamadou Dicko, Olivier Grauby, Jeremie Vidal-Dupiol, Denis Saulnier, Le Moullac Gilles, Martin Rosenthal, Manfred Burghammer, Julius Nouet, Corinne Chevallard, Alain Baronnet, Virginie Chamard
Summary: Biomineralization is a complex process bio-controlled by living organisms, involving physical and chemical processes such as ionic concentration regulation and organic molecules production. This study investigates the early-mineralized calcareous units from two bivalve species using advanced optical and X-ray microscopy methods, revealing chemical and crystallographic insights. The observed ring-like structural features in calcite units are correlated with the absence of calcite and an increase in amorphous calcium carbonate and proteins content. Based on these findings, a temporal biomineralization cycle is proposed, providing biomimetic perspectives for designing crystalline materials.
ACTA BIOMATERIALIA
(2022)
Review
Biochemical Research Methods
Christine Paillard, Yannick Gueguen, K. Mathias Wegner, David Bass, Alberto Pallavicini, Luigi Vezzulli, Isabelle Arzul
Summary: This article synthesizes research on bivalve microbiota, including current analysis methods, comparison between species and host compartments, regulation by environmental factors and host genetics, and the role in disease prevention.
CURRENT OPINION IN BIOTECHNOLOGY
(2022)
Article
Ecology
Elyne Dugeny, Julien de Lorgeril, Bruno Petton, Eve Toulza, Yannick Gueguen, Fabrice Pernet
Summary: This study investigates the influence of seaweed living in association with oysters on their response to disease. The results show that different species of seaweeds can alter the bacterial microbiota of oysters and modify their immune response, leading to increased susceptibility to the disease. This study highlights the importance of considering both macrobiotic and microbiotic interactions for the conservation and management of marine ecosystems and resources.
JOURNAL OF ANIMAL ECOLOGY
(2022)
Article
Geochemistry & Geophysics
Jean-Pierre Cuif, Yannicke Dauphin, Cedrik Lo, Kadda Medjoubi, Denis Saulnier, Andrea Somogyi
Summary: By using synchrotron-based X-ray fluorescence, the early post-grafting mineral deposits in Polynesian pearls have been studied with unprecedented accuracy. This study reveals that the grafting process can result in a greater degradation and evaluates the possible changes in the biomineralization mechanism during grafting.
Article
Microbiology
Pierre Lopez, Denis Saulnier, Shital Swarup-Gaucher, Rarahu David, Christophe Lau, Revahere Taputuarai, Corinne Belliard, Caline Basset, Victor Labrune, Arnaud Marie, Jean Francois Bernardet, Eric Duchaud
Summary: The orbicular batfish, the most important marine fish reared in French Polynesia, has been facing severe outbreaks of "white-patch disease" since 2011, threatening the sustainability of its aquaculture. The disease has been linked to the pathogen T. maritimum, and there is genetic diversity among the isolates, which is crucial for epidemiological studies and the development of management and control strategies.
Article
Microbiology
Manon Fallet, Caroline Montagnani, Bruno Petton, Luc Dantan, Julien de Lorgeril, Sebastien Comarmond, Cristian Chaparro, Eve Toulza, Simon Boitard, Jean-Michel Escoubas, Agnes Vergnes, Jacqueline Le Grand, Ingo Bulla, Yannick Gueguen, Jeremie Vidal-Dupiol, Christoph Grunau, Guillaume Mitta, Celine Cosseau
Summary: This study found that early microbial exposure in Pacific oysters can significantly improve their survival rate against a pathogen causing mortality syndrome. The protection provided by microbial exposure is inheritable across generations and is associated with changes in epigenetic marks and immune gene expression. This discovery suggests that microbial exposure may be an important strategy for protecting oyster aquaculture from infectious diseases.
Article
Biochemistry & Molecular Biology
Hamadou Dicko, Tilman A. Grunewald, Patrick Ferrand, Jeremie Vidal-Dupiol, Vaihiti Teaniniuraitemoana, Manaari Sham Koua, Gilles le Moullac, Jeremy Le Luyer, Denis Saulnier, Virginie Chamard, Julien Duboisset
Summary: In this study, a highly sensitive coherent Raman microscopy approach is used to image the molecular bond concentrations in the shell border. A novel method is presented to compare the amount of amorphous carbonate with its crystalline counterpart. The feasibility and reproducibility of the microscopy technique for imaging in vivo the shell border is demonstrated, opening new perspectives for chemical imaging in the study of biogenic and bio-inspired crystals.
JOURNAL OF STRUCTURAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Daniel Oyanedel, Arnaud Lagorce, Maxime Bruto, Philippe Haffner, Amandine Morot, Yannick Labreuche, Yann Dorant, Sebastien de La Forest Divonne, Francois Delavat, Nicolas Inguimbert, Caroline Montagnani, Benjamin Morga, Eve Toulza, Cristian Chaparro, Jean-Michel Escoubas, Yannick Gueguen, Jeremie Vidal-Dupiol, Julien de Lorgeril, Bruno Petton, Lionel Degremont, Delphine Tourbiez, Lea-Lou Pimpare, Marc Leroy, Oceane Romatif, Juliette Pouzadoux, Guillaume Mitta, Frederique Le Roux, Guillaume M. Charriere, Marie-Agnes Travers, Delphine Destoumieux-Garzon
Summary: In Pacific Oyster Mortality Syndrome (POMS), Vibrio harveyi and ostreid herpesvirus 1 (OsHV-1) are the predominant bacteria causing the disease. V. harveyi synergizes with OsHV-1 by promoting mutual growth and inhibiting oyster's cellular defenses. Furthermore, V. harveyi produces metabolites that benefit the growth of coexisting V. rotiferianus.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Microbiology
Camille Clerissi, Xing Luo, Aude Lucasson, Shogofa Mortaza, Julien de Lorgeril, Eve Toulza, Bruno Petton, Jean-Michel Escoubas, Lionel Degremont, Yannick Gueguen, Delphine Destoumieux-Garzon, Annick Jacq, Guillaume Mitta
Summary: The study used metabarcoding and metatranscriptomic approaches to show that the pathogenesis of POMS is conserved across different infectious environments, and identified a core bacterial consortium that plays a role in POMS pathobiota. The core bacteria have complementary metabolic functions and a low competition for nutrients, which allows them to colonize host tissues and contribute to the conservation of POMS pathobiota.
Article
Microbiology
J. Le Luyer, Q. Schull, P. Auffret, P. Lopez, M. Crusot, C. Belliard, C. Basset, Q. Carradec, J. Poulain, S. Planes, D. Saulnier
Summary: The infection of T. maritimum in the fish host leads to enhanced antibiotic and glucans catabolism functions, as well as reduced sulfate assimilation process while the host displays a wide range of immune effectors, particularly innate and acute inflammatory response. Survival fish showed no signs of stress or significant changes in microbiome diversity compared to controls after 96 hpi, suggesting potential genomic basis of resistance in fish host.