The zebrafish erythropoietin: Functional identification and biochemical characterization

Cheng Ying Chu, Chia Hsiung Cheng, Gen Der Chen, Yi Chung Chen, Chin Chun Hung, Kai Yun Huang, Chang Jen Huang

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


In the present study, the zebrafish epo cDNA was cloned. The encoded protein displays 90%, 55% and 32% identity to the Epo from carp, fugu and human, respectively. Through RT-PCR, the expression of zepo mRNA was mainly in the heart and liver. In the COS-1 cell transfection experiments, the recombinant zEpo-HA protein was efficiently secreted into the culture medium as a glycoprotein and the carbohydrate moiety can be cleaved by the treatment of peptide-N-glycosidase F (PNGase F). Using the morpholino approach, we showed that zepo morphants displayed severe anemia leading to high mortality during development. Such an effect can be significantly rescued by zepo RNA. Furthermore, in the absence of functional zEpo, the expression of specific markers for adult globin genes, such as αA1- and βA1-globin, but not the embryonic βe1-globin, was affected.

Original languageEnglish
Pages (from-to)4265-4271
Number of pages7
JournalFEBS Letters
Issue number22
Publication statusPublished - Sept 4 2007
Externally publishedYes


  • Erythropoietin
  • Globin staining
  • Glycoprotein
  • Morpholino oligonucleotide
  • Secretion
  • Zebrafish

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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