Vascular endothelial growth factor (VEGF) promotes the early development of bovine embryo in the presence of cumulus cells

Hailing Luo, Koji Kimura, Mari Aoki, Makoto Hirako

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Three experiments were conducted to determine the effect of Vascular Endothelial Growth Factor (VEGF) on bovine embryonic development in vitro. Human recombinant VEGF165 was employed at 5 ng/m/ in modified synthetic oviduct fluid. In Exp. 1, bovine cumulus oocyte complexes were matured with or without VEGF for 22 hr, inseminated without VEGF for 6 hr, then cultured with or without VEGF for 42 hr. The cleavage rate and the development rate to 4- to 8-cell were higher (P<0.05) in groups with VEGF during in vitro maturation (IVM, 71.4% and 59.6%), in vitro culture (IVC, 70.3% and 62.3%), and both IVM and IVC (75.9% and 67.8%) than in the group cultured thoroughly without VEGF (49.9% and 38.4%, respectively). In Exp. 2, 4- to 8-cell embryos produced in vitro without VEGF were removed from cumulus cells at 48 hr post-insemination (Pi) and cultured with or without VEGF for 144 hr. The development rates to blastocyst at 96 hr (D6), 120 hr (D7) and 144 hr (D8) were similar (P>0.05) in both groups. In Exp. 3, cumulus cells were removed from presumptive embryos produced by IVM and IVF without VEGF at 10 hr Pi. Denuded embryos were cultured with or without VEGF for 38 hr or 182 hr. The cleavage rate and the development rates to 4- to 8-cell at 48 hr Pi and to blastocyst on D6, D7 and D8 were similar (P>0.05) in all groups. These results suggest that VEGF has a beneficial effect on the initial development of bovine embryo through surrounding cumulus cells.

Original languageEnglish
Pages (from-to)967-971
Number of pages5
JournalJournal of Veterinary Medical Science
Volume64
Issue number11
DOIs
Publication statusPublished - Nov 2002

Keywords

  • Bovine embryo
  • Cumulus cell
  • In vitro development
  • VEGF

ASJC Scopus subject areas

  • veterinary(all)

Fingerprint Dive into the research topics of 'Vascular endothelial growth factor (VEGF) promotes the early development of bovine embryo in the presence of cumulus cells'. Together they form a unique fingerprint.

Cite this