In vitro versus In vivo: Development-, Apoptosis-, and Implantation-Related Gene Expression in Mouse Blastocyst

Iranian Journal of Biotechnology

Sotoodeh, Leila¹  Sarmadi, Fatemeh²  Fathalizadeh, Parisa³  Mahdavinezhad, Forough⁴  Kazemi, Parinaz⁵ 

[1] Department of Animal Science, Razi University, Kermanshah, Iran;Embryo Biotechnology Laboratory (Embio Lab), Departmentof AnimalBiotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran;Embryo Biotechnology Laboratory (Embio Lab), Department of Animal Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB);Embryo Biotechnology Laboratory (Embio Lab), Department of Animal Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran;McGill University Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada

关键词: Gene expression;    fertilization in vitro;    Matrix Metalloproteinase 9;   

DOI  :  10.21859/ijb.2157

学科分类：生物技术

来源: National Institute for Genetic Engineering and Biotechnology

【 摘 要 】

Background: While mammalian embryos can adapt to their environments, their sensitivity overshadows their adaptability in suboptimal in vitro conditions. Therefore, the environment in which the gametes are fertilized or to which the embryo is exposed can greatly affect the quality of the embryo and consequently its implantation potential. Objectives: Since providing an optimal culture condition needs a deep understanding of the environmental effects, and regarding the fact that normal morphology fails to be a reliable indicator of natural embryo development, the current study aimed at comparing in vivo- and in vitro-derived blastocysts at the molecular level. Materials and Methods: In vivo and in vitro mouse blastocysts were obtained by flushing the uterine horns and in vitro fertilization/culture, respectively. Normal blastocysts of both groups were evaluated in terms of hatching rate and expression of three lineage-differentiation-, apoptosis-, and implantation-related genes. Results: The hatching rate was lower in In vitro fertilization (IVF)-produced blastocysts in comparison with that of the in vivo counterparts. More importantly, the study results indicated significant changes in the expression levels of eight out of ten selected genes, especially Mmp-9 (about -10.7-fold). The expression of Mmp-9 in trophoblast cells is required for successful implantation and trophoblast invasion. Conclusions: The current study, in addition to confirming that the altered gene expression pattern of in vitro-produced embryos resulted in normal morphology, provided a possible reason for lower implantation rate of in vitro-produced blastocysts regarding the Mmp-9 expression.

【 授权许可】

Unknown