ZFIN ID: ZDB-PUB-180517-5
Tissue Damage Signaling Is a Prerequisite for Protective Neutrophil Recruitment to Microbial Infection in Zebrafish
Huang, C., Niethammer, P.
Date: 2018
Source: Immunity   48: 1006-1013.e6 (Journal)
Registered Authors: Huang, Cong, Niethammer, Philipp
Keywords: none
Microarrays: GEO:GSE111528
MeSH Terms:
  • Animals
  • Animals, Genetically Modified
  • Fish Diseases/immunology*
  • Fish Diseases/microbiology
  • Immunity, Innate/immunology
  • Larva/immunology
  • Larva/microbiology
  • Neutrophil Infiltration/immunology*
  • Neutrophils/immunology
  • Neutrophils/metabolism
  • Phospholipases A2, Cytosolic/immunology
  • Phospholipases A2, Cytosolic/metabolism
  • Signal Transduction/immunology*
  • Zebrafish/genetics
  • Zebrafish/immunology*
  • Zebrafish/microbiology
  • Zebrafish Proteins/immunology
  • Zebrafish Proteins/metabolism
PubMed: 29768163 Full text @ Immunity
Tissue damage and infection are deemed likewise triggers of innate immune responses. But whereas neutrophil responses to microbes are generally protective, neutrophil recruitment into damaged tissues without infection is deleterious. Why neutrophils respond to tissue damage and not just to microbes is unknown. Is it a flaw of the innate immune system that persists because evolution did not select against it, or does it provide a selective advantage? Here we dissect the contribution of tissue damage signaling to antimicrobial immune responses in a live vertebrate. By intravital imaging of zebrafish larvae, a powerful model for innate immunity, we show that prevention of tissue damage signaling upon microbial ear infection abrogates leukocyte chemotaxis and reduces animal survival, at least in part, through suppression of cytosolic phospholipase A2 (cPla2), which integrates tissue damage- and microbe-derived cues. Thus, microbial cues are insufficient, and damage signaling is essential for antimicrobial neutrophil responses in zebrafish.