PUBLICATION
Gut bacteria Vibrio sp. and Aeromonas sp. trigger the expression levels of proinflammatory cytokine: First evidence from the germ-free zebrafish
- Authors
- Xin, G., Li, W.G., Yoganandham, S.T., Jia, P.P., Ma, Y.B., Pei, D.S.
- ID
- ZDB-PUB-200819-15
- Date
- 2020
- Source
- Fish & shellfish immunology 106: 518-525 (Journal)
- Registered Authors
- Keywords
- Aeromonas sp., Nod-like receptors, Toll-like receptors, Vibrio sp, Zebrafish
- MeSH Terms
-
- Aeromonas/physiology*
- Animals
- Cytokines/genetics*
- Female
- Fish Diseases/immunology*
- Fish Diseases/microbiology
- Gastrointestinal Microbiome*
- Gene Expression*
- Germ-Free Life
- Gram-Negative Bacterial Infections/immunology
- Gram-Negative Bacterial Infections/microbiology
- Gram-Negative Bacterial Infections/veterinary
- Male
- Vibrio/physiology*
- Vibrio Infections/immunology
- Vibrio Infections/microbiology
- Vibrio Infections/veterinary
- Zebrafish/immunology*
- PubMed
- 32810528 Full text @ Fish Shellfish Immunol.
Citation
Xin, G., Li, W.G., Yoganandham, S.T., Jia, P.P., Ma, Y.B., Pei, D.S. (2020) Gut bacteria Vibrio sp. and Aeromonas sp. trigger the expression levels of proinflammatory cytokine: First evidence from the germ-free zebrafish. Fish & shellfish immunology. 106:518-525.
Abstract
Gut microbiota plays a central part in the regulation of multiple host metabolic pathways, such as homeostasis, immunostasis, mucosa permeability, and even brain development. Though, slight known about the function of an individual gut bacterium in zebrafish. In this study, germ-free (GF) and conventionally reared (CV) zebrafish models utilized for studying the role of gut bacteria Vibrio sp. and Aeromonas sp. After the analysis of gut microbial profile in zebrafish male and female at three-month age, Proteobacteria and Fusobacteria dominated the main composition of zebrafish intestinal microflora. However, the relative richness of them was different base on gender variance. Aeromonas sp. and Vibrio sp. belonging to Proteobacteria phylum of bacteria were isolated from zebrafish gut, and their potential capacities to trigger innate immunity were investigated. In gut microbiota absence, the expression levels of the innate immunity genes in the GF group were not significantly changed compared to the CV group. After exposure to Aeromonas sp. and Vibrio sp., the expression levels of myd88, TLRs-, and inflammation-related genes were increased in both GF and CV groups, except tlr2 and NLRs-related genes. However, the expression level of NF-κB and JNK/AP-1 pathway genes were all decreased after exposure to Aeromonas sp. and Vibrio sp. in both GF and CV groups. Interestingly, inflammation-related genes (tnfa, tnfb, and il1β) were activated in the CV group, and there were not significantly changed in the GF group, indicating that other bacteria were indispensable for Aeromonas sp. or Vibrio sp. to activate the inflammation response. Taken together, this is the first study of gut bacteria Vibrio sp. and Aeromonas sp. prompting the innate immune response using the GF and CV zebrafish model.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping