Histochemical study of the definitive erythropoietic foci in the chicken yolk sac

Gen Niimi, Nobuteru Usuda, Masanori Shinzato, Chiyuki Kaneko, Yoichi Nagamura, Jaime Pereda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

It is well known that avian yolk sac is involved in both primitive and definitive erythropoiesis during embryonic development. Definitive erythropoiesis is first detected at about 4-5 days incubation and its maximum activity is reached between day 10 and 15 of incubation, ending between days 18 and 20 of incubation. We confirmed the definitive erythropoietic foci in the chicken yolk sac throughout the 5th to 19th day of incubation by histochemical light and electron microscopy. The definitive erythropoietic foci were observed in the yolk sac endodermal layer from day 5 until day 19, just before hatching. Ultrastructurally, definitive erythropoietic foci were observed extravascularly in the yolk sac endodermal cell layer in direct contact with the vitellolysis zone. These findings provide a basis for clarifying definitive erythropoiesis in vertebrates.

Original languageEnglish
Pages (from-to)9-16
Number of pages8
JournalItalian Journal of Anatomy and Embryology
Volume113
Issue number1
Publication statusPublished - 01-2008

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Embryology

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