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| Rodrigues, Sophie; Paillard, Christine; Van Dillen, Sabine; Tahrioui, Ali; Berjeaud, Jean-marc; Dufour, Alain; Bazire, Alexis. |
| Marine pathogenic bacteria are able to form biofilms on many surfaces, such as mollusc shells, and they can wait for the appropriate opportunity to induce their virulence. Vibrio tapetis can develop such biofilms on the inner surface of shells of the Ruditapes philippinarum clam, leading to the formation of a brown conchiolin deposit in the form of a ring, hence the name of the disease: Brown Ring Disease. The virulence of V. tapetis is presumed to be related to its capacity to form biofilms, but the link has never been clearly established at the physiological or genetic level. In the present study, we used RNA-seq analysis to identify biofilm- and virulence-related genes displaying altered expression in biofilms compared to the planktonic condition. A... |
| Tipo: Text |
Palavras-chave: Biofilm; Virulence; Vibrio tapetis; Transcriptome; Quorum sensing; Type VI secretion system; Brown ring disease. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00470/58140/60611.pdf |
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| Rahmani, Alexandra; Corre, Erwan; Richard, Gaëlle; Bidault, Adeline; Lambert, Christophe; Oliveira, Louisi; Thompson, Cristiane; Thompson, Fabiano; Pichereau, Vianney; Paillard, Christine. |
| The Brown Ring Disease is an infection caused by the bacterium Vibrio tapetis on the Manila clam Ruditapes philippinarum. The process of infection, in the extrapallial fluids (EPFs) of clams, involves alteration of immune functions, in particular on hemocytes which are the cells responsible of phagocytosis. Disorganization of the actin-cytoskeleton in infected clams is a part of what leads to this alteration. This study is the first transcriptomic approach based on collection of extrapallial fluids on living animals experimentally infected by V. tapetis. We performed differential gene expression analysis of EPFs in two experimental treatments (healthy-against infected-clams by V. tapetis), and showed the deregulation of 135 genes. In infected clams, a... |
| Tipo: Text |
Palavras-chave: Brown ring disease; V. tapetis; R. philippinarum; Hemocytes; Actin cytoskeleton; Beta-Thymosin; Coactosin; Resting cells. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00510/62131/66362.pdf |
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