We found that NAC prolonged the storage period of two-cell embryos and maintained the developmental ability by alleviating the reduction of intracellular GSH.
Although, 2-cell embryos stored in PB1 and mWM maintained the developmental potency for 24 h, the rates were markedly decreased to low levels after 48 h (PB1: 0%; mWM: 5%).
We previously reported that M2 medium maintained the developmental ability of two-cell embryos for 48 h at 4 °C, and offspring were obtained from embryos transported by a courier service under refrigerated temperatures.
After undifferentiated proliferation in vitro for 4 to 5 months, these cells still maintained the developmental potential to form trophoblast and derivatives of all three embryonic germ layers, including gut epithelium (endoderm); cartilage, bone, smooth muscle, and striated muscle (mesoderm); and neural epithelium, embryonic ganglia, and stratified squamous epithelium (ectoderm).
Naked embryos were washed through four droplets of M2 medium (Sigma M7167) and subsequently cultured in the "well-in-well" of 50 µl KSOM-AA medium (Chemicon MR-106-D) individually to maintain the developmental competency and embryonic integration.
Because bistable CsgD expression saves energy in biofilm production, it may confer additional advantages to the entire bacterial community while maintaining the developmental potential of the population.
Particularly strong silencing-mediated regulatory and surveillance mechanisms are known to operate in the plant meristems [ 72], and it is possible that the tissue-specific mechanisms prevent the disturbance of the AGO1 function in this tissue, to maintain the developmental integrity of the plants.
Nearly 50% of the miRNA targets were transcription factors in pathways that are likely important in setting or maintaining the developmental program leading to high quality soybean seeds that are one of the dominant sources of protein and oil in world markets.
These cells are called induced pluripotent stem cells (iPSCs) and share similar characteristics with ESCs: exhibiting morphology of ESCs, expressing ESCs markers, having normal karyotype, expressing telomerase activity, and maintaining the developmental potential to differentiate into derivatives of all three primary germ layers.
These induced pluripotent human stem cells have normal karyotypes, express telomerase activity, express cell-surface markers and genes that characterize human ES cells, and maintain the developmental potential to differentiate into advanced derivatives of all three primary germ layers (Yu et al. 2007a).
