Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response

Mass mortality events caused by vibriosis have emerged in hatchery-reared scallop larvae from Chile, threatening scallop aquaculture. In an attempt to mitigate this emerging infectious disease and provide candidates for marker-assisted selective breeding, we tested here the existence of a genetic co...

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Main Authors: Eduardo Jeria, Daniel Oyanedel, Rodrigo Rojas, Rodolfo Farlora, German Lira, Ana Mercado, Katherine Muñoz, Delphine Destoumieux-Garzón, Katherina Brokordt, Paulina Schmitt
Format: Article
Language:English
Published: Frontiers Media S.A. 2023-03-01
Series:Frontiers in Immunology
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fimmu.2023.1150280/full
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author Eduardo Jeria
Daniel Oyanedel
Rodrigo Rojas
Rodolfo Farlora
Rodolfo Farlora
German Lira
Ana Mercado
Katherine Muñoz
Delphine Destoumieux-Garzón
Katherina Brokordt
Paulina Schmitt
author_facet Eduardo Jeria
Daniel Oyanedel
Rodrigo Rojas
Rodolfo Farlora
Rodolfo Farlora
German Lira
Ana Mercado
Katherine Muñoz
Delphine Destoumieux-Garzón
Katherina Brokordt
Paulina Schmitt
author_sort Eduardo Jeria
collection DOAJ
description Mass mortality events caused by vibriosis have emerged in hatchery-reared scallop larvae from Chile, threatening scallop aquaculture. In an attempt to mitigate this emerging infectious disease and provide candidates for marker-assisted selective breeding, we tested here the existence of a genetic component of Argopecten purpuratus scallop resistance to the pathogen Vibrio bivalvicida. Through a dual RNA-seq approach we analyzed the basal transcriptome and the transcriptional response to infection in two resistant and two susceptible families as well as the pathogen transcriptomic response to host colonization. The results highlighted a genetic basis in the resistance of scallop larvae to the pathogen. The Vibrio response was characterized by a general metabolic adaptation to the host environment, along with several predicted virulence factors overexpressed in infected scallop larvae with no difference between resistant and susceptible host phenotypes. On the host side, several biological processes were enriched in uninfected resistant larvae. Within these enriched categories, immune-related processes were overexpressed, while morphogenesis, biomineral tissue development, and angiogenesis were under expressed. Particularly, genes involved in immune recognition and antimicrobial response, such as lipopolysaccharide-binding proteins (LBPs), lysozyme, and bactericidal permeability-increasing protein (BPI) were overexpressed in uninfected resistant larvae. As expected, immune-related biological processes were enriched in Vibrio-infected larvae, but they were more numerous in resistant larvae. Overexpressed immune genes in response to infection included several Toll-like receptors, TNF and NF-κB immune signaling genes, and the antimicrobial peptide Big defensin ApBD1. Results strongly suggest that both a front-loading of immune genes and an enhanced antimicrobial response to infection contribute to the resistance, while pathogen infective strategy does not discriminate between host phenotypes. Overall, early expression of host immune genes appears as a strong determinant of the disease outcome that could be used in marker-assisted selective breeding.
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spelling doaj.art-c6fcdb94921047d78f7059719c831fae2023-03-03T05:13:02ZengFrontiers Media S.A.Frontiers in Immunology1664-32242023-03-011410.3389/fimmu.2023.11502801150280Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial responseEduardo Jeria0Daniel Oyanedel1Rodrigo Rojas2Rodolfo Farlora3Rodolfo Farlora4German Lira5Ana Mercado6Katherine Muñoz7Delphine Destoumieux-Garzón8Katherina Brokordt9Paulina Schmitt10Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, ChileLaboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, ChileLaboratorio de Patobiología Acuática, Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, ChileLaboratorio de Biotecnología Acuática y Genómica Reproductiva (LABYGER), Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, ChileCentro de Investigación y Gestión de Recursos Naturales (CIGREN), Universidad de Valparaíso, Valparaíso, ChileLaboratorio de Fisiología y Genética Marina (FIGEMA), Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, ChileLaboratorio de Fisiología y Genética Marina (FIGEMA), Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, ChileLaboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, ChileIHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, Montpellier, FranceLaboratorio de Fisiología y Genética Marina (FIGEMA), Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, ChileLaboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, ChileMass mortality events caused by vibriosis have emerged in hatchery-reared scallop larvae from Chile, threatening scallop aquaculture. In an attempt to mitigate this emerging infectious disease and provide candidates for marker-assisted selective breeding, we tested here the existence of a genetic component of Argopecten purpuratus scallop resistance to the pathogen Vibrio bivalvicida. Through a dual RNA-seq approach we analyzed the basal transcriptome and the transcriptional response to infection in two resistant and two susceptible families as well as the pathogen transcriptomic response to host colonization. The results highlighted a genetic basis in the resistance of scallop larvae to the pathogen. The Vibrio response was characterized by a general metabolic adaptation to the host environment, along with several predicted virulence factors overexpressed in infected scallop larvae with no difference between resistant and susceptible host phenotypes. On the host side, several biological processes were enriched in uninfected resistant larvae. Within these enriched categories, immune-related processes were overexpressed, while morphogenesis, biomineral tissue development, and angiogenesis were under expressed. Particularly, genes involved in immune recognition and antimicrobial response, such as lipopolysaccharide-binding proteins (LBPs), lysozyme, and bactericidal permeability-increasing protein (BPI) were overexpressed in uninfected resistant larvae. As expected, immune-related biological processes were enriched in Vibrio-infected larvae, but they were more numerous in resistant larvae. Overexpressed immune genes in response to infection included several Toll-like receptors, TNF and NF-κB immune signaling genes, and the antimicrobial peptide Big defensin ApBD1. Results strongly suggest that both a front-loading of immune genes and an enhanced antimicrobial response to infection contribute to the resistance, while pathogen infective strategy does not discriminate between host phenotypes. Overall, early expression of host immune genes appears as a strong determinant of the disease outcome that could be used in marker-assisted selective breeding.https://www.frontiersin.org/articles/10.3389/fimmu.2023.1150280/fullmolluskscallop-Vibrio interactioninvertebrate immunityimmune front-loadingresistance to diseases
spellingShingle Eduardo Jeria
Daniel Oyanedel
Rodrigo Rojas
Rodolfo Farlora
Rodolfo Farlora
German Lira
Ana Mercado
Katherine Muñoz
Delphine Destoumieux-Garzón
Katherina Brokordt
Paulina Schmitt
Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
Frontiers in Immunology
mollusk
scallop-Vibrio interaction
invertebrate immunity
immune front-loading
resistance to diseases
title Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
title_full Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
title_fullStr Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
title_full_unstemmed Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
title_short Resistance of Argopecten purpuratus scallop larvae to vibriosis is associated with the front-loading of immune genes and enhanced antimicrobial response
title_sort resistance of argopecten purpuratus scallop larvae to vibriosis is associated with the front loading of immune genes and enhanced antimicrobial response
topic mollusk
scallop-Vibrio interaction
invertebrate immunity
immune front-loading
resistance to diseases
url https://www.frontiersin.org/articles/10.3389/fimmu.2023.1150280/full
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