Ultrastructure of vitrified rabbit transgenic embryos

P. Chrenek, A. V. Makarevich, M. Popelková, J. Schlarmannová, S. Toporcerová, A. Ostró, J. Živčák, Z. Bösze

Research output: Contribution to journalArticle

Abstract

The aim of the study was to determine the viability of rabbit transgenic (enhanced green fluorescent protein (EGFP)-positive) embryos cultured in vitro and compare with gene-microinjected (Mi) nontransgenic (EGFP-negative) embryos following vitrification. Non-microinjected and non-vitrified embryos were used as the control. Morphological signs of injury to embryo organelles were determined at the ultrastructural level using transmission electron microscopy (TEM). Morphometric evaluation was performed on cellular organelles using microphotographs obtained by TEM. Intact and Mi embryos recovered from in vivo fertilized eggs at 19-20 hours post coitum (hpc) were cultured for up to 72 hpc (morula stage), evaluated for the EGFP gene integration and then vitrified in 0.25 ml insemination straws in modified EFS (40% ethylene glycol + 18% Ficoll 70 + 0.3 M sucrose) vitrification solution. After 1-3 days the embryos were devitrified, a representative selection of embryos was analyzed by TEM and the remaining embryos were subjected to additional in vitro culture. Observations by TEM showed that the vitrified/warmed EGFP-positive and EGFP-negative embryos had a slight accumulation of cellular debris and lipid droplets compared with the control intact embryos. More severe changes were detected in the membrane structures of the treated embryos, mostly in the cytoplasmic envelope, trophoblastic microvilli, junctional contacts and mitochondria. We suggest that the higher proportion of deteriorated cell structures and organelles in the treated embryos may be due to the vitrification process rather than to mechanical violation (the gene-microinjection procedure), as a detailed inspection of ultrastructure revealed that most damage occurred in the cell membrane structures.

Original languageEnglish
Pages (from-to)558-564
Number of pages7
JournalZygote
Volume22
Issue number4
DOIs
Publication statusPublished - Nov 15 2014

Fingerprint

Embryonic Structures
Rabbits
Vitrification
Transmission Electron Microscopy
Organelles
Cell Membrane Structures
Genes
Morula
Ficoll
Ethylene Glycol
Insemination
Zygote
Microinjections
Microvilli
Sucrose
Mitochondria
enhanced green fluorescent protein
Membranes
Wounds and Injuries

Keywords

  • EGFP
  • Morphometry
  • Rabbit embryo
  • Transgenesis
  • Ultrastructure
  • Vitrification

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology
  • Medicine(all)

Cite this

Chrenek, P., Makarevich, A. V., Popelková, M., Schlarmannová, J., Toporcerová, S., Ostró, A., ... Bösze, Z. (2014). Ultrastructure of vitrified rabbit transgenic embryos. Zygote, 22(4), 558-564. https://doi.org/10.1017/S0967199413000282

Ultrastructure of vitrified rabbit transgenic embryos. / Chrenek, P.; Makarevich, A. V.; Popelková, M.; Schlarmannová, J.; Toporcerová, S.; Ostró, A.; Živčák, J.; Bösze, Z.

In: Zygote, Vol. 22, No. 4, 15.11.2014, p. 558-564.

Research output: Contribution to journalArticle

Chrenek, P, Makarevich, AV, Popelková, M, Schlarmannová, J, Toporcerová, S, Ostró, A, Živčák, J & Bösze, Z 2014, 'Ultrastructure of vitrified rabbit transgenic embryos', Zygote, vol. 22, no. 4, pp. 558-564. https://doi.org/10.1017/S0967199413000282
Chrenek P, Makarevich AV, Popelková M, Schlarmannová J, Toporcerová S, Ostró A et al. Ultrastructure of vitrified rabbit transgenic embryos. Zygote. 2014 Nov 15;22(4):558-564. https://doi.org/10.1017/S0967199413000282
Chrenek, P. ; Makarevich, A. V. ; Popelková, M. ; Schlarmannová, J. ; Toporcerová, S. ; Ostró, A. ; Živčák, J. ; Bösze, Z. / Ultrastructure of vitrified rabbit transgenic embryos. In: Zygote. 2014 ; Vol. 22, No. 4. pp. 558-564.
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