PUBLICATION
Endogenous melatonin promotes rhythmic recruitment of neutrophils toward an injury in zebrafish
- Authors
- Ren, D.L., Ji, C., Wang, X.B., Wang, H., Hu, B.
- ID
- ZDB-PUB-170707-6
- Date
- 2017
- Source
- Scientific Reports 7: 4696 (Journal)
- Registered Authors
- Hu, Bing, Ji, Cheng, Wang, Han
- Keywords
- Circadian rhythms, Imaging the immune system, Neutrophils
- MeSH Terms
-
- Animals
- Animals, Genetically Modified
- Arylalkylamine N-Acetyltransferase/genetics*
- Cell Movement
- Circadian Rhythm
- Disease Models, Animal
- Interleukin-1beta/genetics
- Interleukin-8/genetics
- Melatonin/deficiency
- Melatonin/metabolism*
- Mutation*
- Neutrophils/cytology*
- Neutrophils/metabolism
- Zebrafish
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
- PubMed
- 28680128 Full text @ Sci. Rep.
Citation
Ren, D.L., Ji, C., Wang, X.B., Wang, H., Hu, B. (2017) Endogenous melatonin promotes rhythmic recruitment of neutrophils toward an injury in zebrafish. Scientific Reports. 7:4696.
Abstract
Neutrophil recruitment to injured tissue appears to be an evolutionarily conserved strategy for organisms to fight against exogenous insults. Recent studies have shown rhythmic migration of neutrophils and several factors, including melatonin, have been implicated in regulating this rhythmic migration. The mechanisms underlying how endogenous melatonin regulates rhythmic neutrophils migration, however, are unclear. Here we generated a zebrafish annat2 mutant that lacks endogenous melatonin and, subsequently, a Tg(lyz:EGFP);aanat2 -/- transgenic line that allows for monitoring neutrophils migration visually in live zebrafish. We observed that migrating neutrophils are significantly reduced in aanat2 -/- mutant zebrafish under a light/dark condition, and the disrupted migrating rhythmicity of neutrophils in aanat2 -/- zebrafish is independent of the circadian clock. Further, we also found that endogenous melatonin enhances neutrophils migration likely by inducing the expression of cytokines such as interleukin-8 and interleukin-1β. Together, our findings provide evidence that endogenous melatonin promotes rhythmic migration of neutrophils through cytokines in zebrafish.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping