Effect of Cerium Oxide Nanoparticles on the Expression of Developmental and Apoptosis Genes of Testicular Tissue in 6-Day-Old NMRI Mice Fetuses.

Cerium oxide (CeO) has potential applications in medicine and various consumer products. This study investigated the effect of CeO on the expression of genes associated with apoptosis and testicular development in mouse embryos. The experimental groups of pregnant mice were injected intraperitoneally with CeO at a concentration of 10 mg/kg on days 7 and 14 of pregnancy.

Effect of cyanocobalamin on oocyte maturation, fertilization, and embryo development in mice.

The aim of this study was to investigate the effect of cyanocobalamin supplementation on in vitro maturation (IVM), in vitro fertilization (IVF), and subsequent embryonic development competence to the blastocyst stage, and in vitro development of mouse 2-cell embryos. Cumulus cells were prepared from mouse cumulus-oocyte complexes (COCs) and incubated for 24 h in an in vitro culture (IVC) medium that contained different concentrations of cyanocobalamin (100, 200, 300 or 500 pM). We collected 2-cell embryos from superovulated NMRI mice and cultured them in the same concentrations of cyanocobalamin (100, 200, 300 or 500 pM).