PUBLICATION

Developmental expression of functional cyclooxygenases in zebrafish

Authors
Grosser, T., Yusuff, S., Cheskis, E., Pack, M.A., and FitzGerald, G.A.
ID
ZDB-PUB-020521-8
Date
2002
Source
Proceedings of the National Academy of Sciences of the United States of America   99(12): 8418-8423 (Journal)
Registered Authors
Pack, Michael
Keywords
none
MeSH Terms
  • Amino Acid Sequence
  • Animals
  • Cyclooxygenase 1
  • Cyclooxygenase 2
  • Dinoprostone/metabolism
  • Gene Expression Regulation, Developmental*
  • Gene Expression Regulation, Enzymologic*
  • Humans
  • Isoenzymes/chemistry
  • Isoenzymes/genetics*
  • Membrane Proteins
  • Molecular Sequence Data
  • Prostaglandin-Endoperoxide Synthases/chemistry
  • Prostaglandin-Endoperoxide Synthases/genetics*
  • Sequence Alignment
  • Sequence Homology, Amino Acid
  • Zebrafish
PubMed
12011329 Full text @ Proc. Natl. Acad. Sci. USA
Abstract
Study of the cyclooxygenases (COXs) has been limited by the role of COX-2 in murine reproduction and renal organogenesis. We sought to characterize COX expression and function in zebrafish (z). Full-length cDNAs of zCOX-1 and zCOX-2 were cloned and assigned to conserved regions of chromosomes 5 and 2, respectively. The deduced proteins are 67% homologous with their human orthologs. Prostaglandin (PG) E(2) is the predominant zCOX product detected by mass spectrometry. Pharmacological inhibitors demonstrate selectivity when directed against heterologously expressed zCOX isoforms. Zebrafish thrombocyte aggregation ex vivo and hemostasis in vivo are sensitive to inhibition of zCOX-1, but not zCOX-2. Both zCOXs were widely expressed during development, and knockdown of zCOX-1 causes growth arrest during early embryogenesis. zCOX-1 is widely evident in the embryonic vasculature, whereas zCOX-2 exhibits a more restricted pattern of expression. Both zCOX isoforms are genetically and functionally homologous to their mammalian orthologs. The zebrafish affords a tractable model system for the study of COX biology and development.
Genes / Markers
Figures
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Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping