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[Development of preimplantation mouse embryos in diffusion chambers]
Abstract:
The diffusion chambers with the preimplantation CBA X C57BL mouse embryos (at the stages of blastomeres, morula, blastocyst) were placed in the abdominal cavity of males. Developmental peculiarities of the embryos, level of mitotic activity in their separate parts, as well as dynamics of the number of gigantic trophoblast cells and the volume of their nuclei have been studied. The development of the embryos in the diffusion chambers was shown to depend on the type of membranous filters: they developed from an earlier stage (stage of 4 blastomeres) on the nucleopore filters than on the millipore ones. The morphogenetic transformation proceeded in the preimplantation embryos at a slower rate resulting in the formation of two -and (in single cases) three-layered embryonic cylinder. Later the embryos were disorganized. The repeated passage of the disorganized embryo cells (six passages during the year) allowed to obtain structures similar with yolk sac carcinoma.
Insights
Mouse embryos cultured in diffusion chambers showed varied development based on filter type. Repeated passages of disorganized cells yielded structures resembling yolk sac carcinoma.
Area of Science:
- Developmental biology
- Embryology
- Cell biology
Context:
- Preimplantation mouse embryos (CBA X C57BL) were cultured in diffusion chambers within the male abdominal cavity.
- The study investigated embryo development, mitotic activity, and trophoblast cell dynamics.
Purpose:
- To analyze the developmental peculiarities of preimplantation mouse embryos under in vivo conditions using diffusion chambers.
- To assess the influence of different filter types (nucleopore vs. millipore) on embryonic development.
- To investigate the potential for cellular differentiation and tumor-like structure formation from prolonged embryo cell culture.
Summary:
- Embryonic development in diffusion chambers was filter-dependent, with nucleopore filters supporting earlier developmental stages than millipore filters.
- Embryos exhibited slower morphogenetic transformation, forming two- to three-layered embryonic cylinders before disorganization.
- Subsequent serial passages of disorganized embryo cells over a year resulted in the formation of structures resembling yolk sac carcinoma.
Impact:
- Provides insights into the developmental plasticity of early mouse embryos in a controlled in vivo environment.
- Highlights the critical role of filter material in supporting embryonic development within diffusion chambers.
- Suggests a potential model for studying early tumor formation or differentiation pathways from embryonic cells.