Consulta: subjectFacets:"Bivalve mollusk"
Registros recuperados: 3
Data/hora: 14/06/2024 03:31:30

Expression, tissue localization and synergy of antimicrobial peptides and proteins in the immune response of the oyster Crassostrea gigas
Provedor de dados: 5
Autores: Schmitt, Paulina; De Lorgeril, Julien; Gueguen, Yannick; Destoumieux-garzon, Delphine; Bachere, Evelyne.
Diverse families of antimicrobial peptides and proteins have been described in oysters. We investigated here how antimicrobials are involved in the immune response against a pathogenic strain of Vibrio splendidus. Oyster antimicrobials were shown to display a wide variety of expression profiles in hemocyte populations and tissues. Oyster defensins are constitutively expressed in specific tissues such as mantle (Cg-Defm) or hemocytes (Cg-Defhs), while Cg-BPI is inducible and Cg-Prp appears down-regulated in hemocytes upon infection. The migratory behavior of hemocytes that express the different antimicrobials was found to be involved in the oyster response to a pathogenic Vibrio infection. Indeed, it contributes to colocalize several antimicrobials that...
Tipo: Text
Palavras-chave: Pacific oyster; Bivalve mollusk; Innate immunity; Bactericidal/permeability-increasing protein; Proline-rich peptide; Defensin; Vibrio.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00093/20382/18267.pdf

Expression of immune-related genes in the oyster Crassostrea gigas during ontogenesis
Provedor de dados: 5
Autores: Tirape, Ana; Bacque, Coralie; Brizard, Raphael; Vandenbulcke, Franck; Boulo, Viviane.
The work presented here reports the expression of immune-related genes during ontogenesis in the oyster Crassostrea gigar. 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...
Tipo: Text
Palavras-chave: Rel/NF kappa B pathway; Cell proliferation; Hematopoiesis; Mollusk immunity; Hemocytes; Bivalve mollusk.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2612.pdf

Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus
Provedor de dados: 5
Autores: Rayssac, Nathalie; Pernet, Fabrice; Lacasse, Olivia; Tremblay, Rejean.
Temperature is a major factor contributing to the biogeography of intertidal poikilotherms. The population dynamics of intertidal invertebrates like mussels are strongly dependent on larval supply and larval mortality. Unlike adults, which are resistant to fluctuating environmental conditions, larvae are highly sensitive to the physicochemical conditions of the pelagic zone. The effects of rearing temperature on larval and post-larval performance of 2 coexisting mussels species, Mytilus edulis and M. trossulus, were examined in this study. In the first experiment, larvae of both species were reared separately at constant temperatures of 10, 17, and 24 degrees C from D-larvae to the dissoconch stage. In the second experiment, pediveligers were reared under...
Tipo: Text
Palavras-chave: Thermal adaptation; Bivalve mollusk; Selection; Biogeography; Lipid; Larval ecology.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13028/10159.pdf