The ability of mixtures of embryonic cells to sort-out from one another has been compared to the breaking of a dispersion or emulsion of two immiscible fluids.
The DAH attributes the "sorting-out" behavior of mixtures of embryonic cells as they self-assemble to differences in their strengths of intercellular adhesions, expressible as tissue surface tension [1].
Within 24 h, a mixture of mouse embryonic fibroblasts (MEF) and cells, derived from the dorsal root ganglion (DRG) (sensory neurons and Schwann cells) grown in hanging drops, assembled to coherent spherical microtissues characterized by a MEF feeder core and a peripheral layer of DRG-derived cells.
By 1952, Robbins's group had successfully propagated the polio virus in mixtures of human embryonic skin and muscle cells.
Heterogeneous mixtures of mouse embryonic stem cells (mESCs) were prepared consisting of 10% to 50% stained target stem cells.
This suggests that ESC cultures contain a mixture of cells resembling precursors of embryonic epiblast and extraembryonic tissues but that epiblast-like precursors have a competitive advantage when reintroduced into chimeras.
While the researchers' idea was to let the embryos live only transiently, no one knows what kind of creature might result from a mixture of mouse and human embryonic stem cells.
An artificial contaminating situation was also generated with random sampling of RNA-seq datasets from two cell categories, pure C57BL/6 (B6) hematopoietic stem cells (HSCs), and a mixture of 129 and B6 embryonic stem cells (129B6F1 ESCs) at various ratios.
This may be due to the complexities of dealing with a mixture of multiple cell types, or embryonic lethality of certain mutations preventing analysis at an appropriate stage.
Similarly, embryonic exposure to mixture of CBZ, acetaminophen, gemfibrozil, and venlafaxine at concentrations of 0.5 and 10 μg·L−1 or diluted wastewater treatment effluent (5% and 25%) did not affect hatching success of zebrafish (Danio rerio) [ 31].
