title: A relationship between antimicrobial peptide gene expression and capacity of a selected shrimp line to survive a Vibrio infection.
abstract: Understanding of antimicrobial defence mechanisms of penaeid shrimp should help in the design of efficient strategies for the management and disease control in aquaculture. In this study, we have specifically analysed the expression in circulating hemocytes of antimicrobial peptides (AMPs) encoding genes, such as PEN2 and PEN3, ALF, crustin, lysozyme and a putative cysteine-rich peptide. We evidenced a relationship between the level of expression of some AMPs and the successful response of the shrimp, Litopenaeus stylirostris, to circumvent a pathogenic Vibrio penaeicida infection. Additionally, significant differences in some AMP transcript amounts are evidenced between control, non-selected shrimp line and the third generation breeding of shrimp selected for their survival to natural V. penaeicida infections. On the basis of these results, it will now be of great interest to determine if these AMPs are directly involved in the resistance of shrimp to infection or if they only reflect other acquired defence mechanisms which can confer a resistance.
authors.affiliation: Ifremer, CNRS, Université de Montpellier II, UMR 5119 Ecosystèmes Lagunaires, Place Eugène Bataillon, CC80, 34095 Montpellier Cedex 5, France.
authors.forename: Julien
authors.initials: J
authors.lastname: de Lorgeril
authors.forename: Yannick
authors.initials: Y
authors.lastname: Gueguen
authors.forename: Cyrille
authors.initials: C
authors.lastname: Goarant
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Goyard
authors.forename: Chantal
authors.initials: C
authors.lastname: Mugnier
authors.forename: Julie
authors.initials: J
authors.lastname: Fievet
authors.forename: David
authors.initials: D
authors.lastname: Piquemal
authors.forename: Evelyne
authors.initials: E
authors.lastname: Bachère
mesh_terms: D000818:Animals; D023181:Antimicrobial Cationic Peptides / Q000235:genetics* / Q000378:metabolism; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D006434:Hemocytes; D017403:In Situ Hybridization; D009113:Muramidase / Q000235:genetics / Q000378:metabolism; D033561:Penaeidae / Q000235:genetics* / Q000382:microbiology*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016019:Survival Analysis; D014735:Vibrio Infections / Q000235:genetics*
chemical_list: D023181:Antimicrobial Cationic Peptides; D012333:RNA, Messenger; D009113:Muramidase