PUBLICATION
Dietary supplementation with microalgae enhances the zebrafish growth performance by modulating immune status and gut microbiota
- Authors
- Ma, K., Chen, S., Wu, Y., Ma, Y., Qiao, H., Fan, J., Wu, H.
- ID
- ZDB-PUB-220107-7
- Date
- 2022
- Source
- Applied Microbiology and Biotechnology 106(2): 773-788 (Journal)
- Registered Authors
- Keywords
- Growth performance, Gut microbiota, Immune status, Microalgae, Zebrafish
- MeSH Terms
-
- Animal Feed/analysis
- Animals
- Diet
- Dietary Supplements/analysis
- Gastrointestinal Microbiome*
- Microalgae*
- Zebrafish
- PubMed
- 34989826 Full text @ Appl. Microbiol. Biotechnol.
Citation
Ma, K., Chen, S., Wu, Y., Ma, Y., Qiao, H., Fan, J., Wu, H. (2022) Dietary supplementation with microalgae enhances the zebrafish growth performance by modulating immune status and gut microbiota. Applied Microbiology and Biotechnology. 106(2):773-788.
Abstract
Microalgae are known to be abundant in various habitats around the globe, and are rich in high value-added products such as fatty acids, polysaccharides, proteins, and pigments. Microalgae can be exploited as the basic and primitive food source of aquatic animals. We investigated the effects of dietary supplementation with Schizochytrium sp., Spirulina platensis, Chloroella sorokiniana, Chromochloris zofingiensis, and Dunaliella salina on the growth performance, immune status, and intestinal health of zebrafish (Danio rerio). The results showed that these five microalgae diets could improve the feed conversion rate (FCR), especially the D. salina (FCR = 1.02%) and Schizochytrium sp. (FCR = 1.20%) additive groups. Moreover, the microalgae diets decreased the gene expression level of the pro-inflammatory cytokines IL6, IL8, and IL1β at a normal physiological state of the intestine, especially the Schizochytrium sp., S. platensis, and D. salina dietary groups. The expression of neutrophil marker b7r was increased in the C. sorokiniana diet group; after, the zebrafish were challenged with Vibrio anguillarum, improving the ability to resist this disease. We also found that microalgae diets could regulate the gut microbiota of fish as well as increase the relative abundance of probiotics. To further explain, Cetobacterium was significantly enriched in the S. platensis additive group and Stenotrophomonas was higher in the Schizochytrium sp. additive group than in the other groups. Conversely, harmful bacteria Mycoplasma reduced in all tested microalgae diet groups. Our study indicated that these microalgae could serve as a food source supplement and benefit the health of fish. KEY POINTS: • Microalgae diets enhanced the growth performance of zebrafish. • Microalgae diets attenuated the intestinal inflammatory responses of zebrafish. • Microalgae diets modulated the gut microbiota composition to improve fish health.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping