Zebrafish heme oxygenase 1a is necessary for normal development and macrophage migration

Author:

Luo Kaiming,Ogawa Masahito,Ayer Anita,Britton Warwick J,Stocker Roland,Kikuchi Kazu,Oehlers Stefan HORCID

Abstract

AbstractHeme oxygenase function is highly conserved between vertebrates where it plays important roles in normal embryonic development and controls oxidative stress. Expression of the zebrafish heme oxygenase 1 genes are known to be responsive to oxidative stress suggesting a conserved physiological function. Here we generate a knockout allele of zebrafish hmox1a and characterize the effects of hmox1a and hmox1b loss on embryonic development. We find that loss of hmox1a or hmox1b causes developmental defects in only a minority of embryos, in contrast to Hmox1 gene deletions in mice that causes loss of most embryos. Using a tail wound inflammation assay we find a conserved role for hmox1a, but not hmox1b, in normal macrophage migration to the wound site. Together our results indicate zebrafish hmox1a has clearly a partitioned role from hmox1b that is more consistent with conserved functions of mammalian Heme oxygenase 1.

Publisher

Cold Spring Harbor Laboratory

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