Ontogeny of lymphoid organs and mucosal associated lymphoid tissues in ballan wrasse and the effect of different diets
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PROVIDER: PRJNA823678 | ENA |
REPOSITORIES: ENA
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Project description:Ballan wrasse (Labrus bergylta) is used as a cleaner fish in Norwegian aquaculture to control sea lice. Thus, knowledge on the digestive physiology and nutrient requirements, as well as the ontogeny of the immune system is important. In this study, two different diets were tested; diet 1 was used as control diet consisting of artemia and rotifers cultivated and enriched in the in-house facility at IMR, Austevoll, Bergen (Norway). Diet 2 consists in plankton which has successfully been used before in cod larvae generating more robust individuals. Sampling was done according to the standard length of the larvae rather than age (dph). Sampling point 0 (BW0) (4 mm), sampling point 2 (BW2) (4,5 mm), sampling point 3 (BW3) (5,7 to 6 mm), sampling 4 (BW4) (7 to 7,5 mm), sampling point 5 (BW5) (10 to 10,5 mm), sampling point 6 (BW6) (16 to 16,5 mm), and sampling point 7 (BW7) (25 to 30 mm). Ontogeny of lymphoid organs and mucosal associated lymphoid tissues in ballan wrasse and the effect of different diets were investigated.
2023-02-17 | GSE200208 | GEO
Project description:This paper presents data from a 5-week feeding trial in which Ballan wrasse was fed either a reference diet, or the identical diet supplemented with i) the antinutrient soya saponin (0.7%) ii) a commercial prebiotic (Aquate™ SG, 0.4%) or iii) a combination of soya saponin and prebiotics. Blood, tissue and gut content from four separate intestinal segments were sampled from 6 fish per duplicate tank. Gut health and digestive functions were evaluated by various endpoint measurements employing biochemical and histomorphological tools as well as global gene expression profiling. No significant differences in fish growth were seen between the four dietary groups. Saponin supplementation, both alone and in combination with prebiotics, increased weight indices of two mid gut segments (IN2 and IN3) and decreased blood plasma glucose, cholesterol and total protein. Dry matter of intestinal content and activity of digestive enzymes were not affected by diet. Histomorphological analyses revealed clear structural alterations in the gut of fish fed saponin, both alone and in combination with prebiotics. The results indicated a progressing inflammation with increased infiltration by immune cells particularly into the distal parts of the intestine. Gene expression profiles obtained by RNA sequencing and quantitative PCR mirrored the histological and biochemical changes induced by the saponin load. The work has provided novel basic knowledge on the anatomy, digestive and immune function of the Ballan wrasse intestine. Additionally, the study demonstrated that Ballan wrasse gut health and digestive function may be markedly affected by diet composition.
2021-06-15 | GSE152475 | GEO
Project description:Stomach-less fishes comprise a diverse phylogenetic group within the teleosts indicating that the organ has been lost several times during evolution. In the present project we have combined Illumina short read platform with the PacBio long read platform to sequence the ballan wrasse (Labrus bergylta) genome and its intestinal transcriptome. The genome was applied to investigate the elimination and conservation of genes related to stomach function and appetite regulation in wrasse in relation to the loss of stomach in this species. We have sequenced the transcriptome of four intestinal segments from six ballan wrasse (Labrus bergylta) for the purpose of identifying possible functional organization along the wrasse intestine. The transcriptomic reads were mapped against the newly assembled genome. The analysis revealed a transcriptional gradient showing genes involved in nutrient digestion and uptake being highly expressed in the anterior intestine and declining towards the end of the intestine. The last segment, hind-gut, had the most distinct expression between the four segments with increased expression of genes coding for proteins involved in lysosomal activity, antigen presenting and vitamin b12 uptake. Overall, our results suggests that the wrasse entire digestive system is comparable to the small intestine of mammals with regards to gene expression missing both a stomach and colon. Gene expression related to colon in humans such as MS4A12 were found in the last segment. The genome analysis also confirmed the lack of genes coding for gastric proteins such as gastric lipase, pepsin, gastrin and ghrelin. Although ghrelin is not only related to stomach, ghrelin was missing in all stomach-less fish species with the exception of cyprinid. Ghrelin is currently the only known orexigenic hormone.
2017-06-01 | GSE93191 | GEO
Project description:Bacterial communities of Ballan wrasse (Labrus bergylta) eggs during incubation at a commercial marine hatchery
| PRJEB30278 | ENA
Project description:Development of broodstock management and husbandry tools for improved hatchery performance of ballan wrasse (Labrus bergylta).
| PRJEB6999 | ENA
Project description:Nutrient sensing controlling gut motility in the stomachless fish ballan wrasse (Labrus berggylta)
| PRJNA531433 | ENA
Project description:Ex vivo intestines from 15-20 g ballan wrass (Labrus bergylta) were administered a bolus (lipid, protein, inert matter or empty control) before being mounted in oxygenated physiological buffer inside a glass vial. The intestinal motility patterns were documented with time lapse imaging for 14 hours. The images were used to construct spatio-temporal maps for gut motility analysis; i.e. to determine the speed, amplitude, frequency, travelled distance, direction, and initiation site of waves of muscle contractions. The experiments were repeated for RNA sampling and deep seq analysis. Gene expression analysis showed that intestines administered intact lipids clustered closer to the empty intestines compared to those given hydrolyzed lipids.
2020-04-01 | GSE129459 | GEO
Project description:Marine fish larvae often experience high mortality unrelated to predation during early life stages, and farmed ballan wrasse (Labrus bergylta) is no exception. Knowing when the adaptive immune system is developed and fully functional, and how nutrition may modulate these processes is therefore of importance to establish effective prophylactic measures and will also extend the relatively limited knowledge on the immune system in lower vertebrates. The thymus anlage of ballan wrasse was found to be histologically visible for the first time at larval stage 3 (20-30 days post hatch, dph) and becomes lymphoid at stage 5 (50-60 dph) correlating with an increase of T-cell marker transcripts. At this stage, a clear zonation into a RAG1+ cortex and a RAG1- CD3ϵ+ medulla was distinguished, indicating that T-cell maturation processes in ballan wrasse are similar to other teleosts. The higher abundance of CD4-1+ compared to CD8β+ cells in the thymus together with the apparent lack of CD8β+ cells in gill, gut, and pharynx, where CD4-1+ cells were identified, indicates that helper T-cells have a more prominent role during larval development compared to cytotoxic T-cells. As ballan wrasse lacks a stomach but has an exceptionally high IgM expression in the hindgut, we hypothesize that helper T-cells are crucial for activation and recruitment of IgM+ B-cells and possibly other leukocytes to the gut during early development. Nutritional factors such as DHA/EPA, Zn and Se may lead to an earlier expression of certain T-cell markers as well as a larger size of the thymus, indicating an earlier onset of adaptive immunity. Including live feeds that supplies the larva with higher amounts of these nutrients can therefore be beneficial for ballan wrasse farming.
| S-EPMC10183603 | biostudies-literature
Project description:Dietary soyasaponin and prebiotics modulate intestinal health and function in the cleaner fish Ballan wrasse (Labrus bergylta)
| PRJNA639509 | ENA
Project description:LTi cells are part of the ILC family and essential for the formation of secondary lymph nodes within the embryo. This data set contains the analysis of lymphoid tissue (LTi) cell ontogeny, studied by expression profile analysis with RNA bulk sequencing of the populations associated with LTi ontogeny isolated from fetal liver vs. embryonic periphery at embryonic stage E13.5. They indicate a proliferating precursor population mainly in the fetal liver, while the embryonic periphery harbors the definitive lineage.
2020-08-01 | GSE153607 | GEO