Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1186/s42523-022-00209-5
Licence creative commons licence
Title (Primary) Modulation of gut microbiota, blood metabolites, and disease resistance by dietary β-glucan in rainbow trout (Oncorhynchus mykiss)
Author Menanteau-Ledouble, S.; Skov, J.; Lukassen, M.B.; Rolle-Kampczyk, U.; Haange, S.-B. ORCID logo ; Dalsgaard, I.; von Bergen, M.; Nielsen, J.L.
Source Titel Animal Microbiome
Year 2022
Department iDiv; MOLSYB
Volume 4
Page From art. 358
Language englisch
Topic T9 Healthy Planet
Supplements https://ndownloader.figstatic.com/files/38288221
Keywords Oncorhynchus mykiss; Gut microbiota; β-glucan; Prebiotic; Metabolite response
Abstract Background

Prebiotics are known to have a positive impact on fish health and growth rate, and β-glucans are among the most used prebiotics on the market. In this study, rainbow trout (Oncorhynchus mykiss) were treated with a β-1,3;1,6-glucan dietary supplement (at a dose of 0 g, 1 g, 10 g, and 50 g β-glucan per kg of feed). After 6 weeks, the effect of the β-glucan was evaluated by determining the changes in the microbiota and the blood serum metabolites in the fish. The impact of β-glucan on the immune system was evaluated through a challenge experiment with the bacterial fish pathogen Yersinia ruckeri.
Results

The microbiota showed a significant change in terms of composition following β-glucan treatment, notably an increase in the relative abundance of members of the genus Aurantimicrobium, associated with a decreased abundance of the genera Carnobacterium and Deefgea. Furthermore, analysis of more than 200 metabolites revealed that the relative levels of 53 metabolites, in particular compounds related to phosphatidylcholines, were up- or downregulated in response to the dietary supplementation, this included the amino acid alanine that was significantly upregulated in the fish that had received the highest dose of β-glucan. Meanwhile, no strong effect could be detected on the resistance of the fish to the bacterial infection.
Conclusions

The present study illustrates the ability of β-glucans to modify the gut microbiota of fish, resulting in alteration of the metabolome and affecting fish health through the lipidome of rainbow trout.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26018
Menanteau-Ledouble, S., Skov, J., Lukassen, M.B., Rolle-Kampczyk, U., Haange, S.-B., Dalsgaard, I., von Bergen, M., Nielsen, J.L. (2022):
Modulation of gut microbiota, blood metabolites, and disease resistance by dietary β-glucan in rainbow trout (Oncorhynchus mykiss)
Animal Microbiome 4 , art. 358