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Updated: Jul 27, 2025
Derivation of Stem Cell Lines from Mouse Preimplantation Embryos
Published on: August 20, 2017
Pluripotent Embryonal Stem Cell Lines Can Be Established from Disaggregated Mouse Morulae: (mouse embryonal stem (ES)
1Friedrich Miescher Laboratorium der Max Planck Gesellschaft, Spemannstrasse 37/39, D-7400 Tübingen, FRG.
Abstract:
Mouse pluripotent embryonal stem (ES) cell lines hitherto have been conventionally isolated from the 'inner cell mass' of mouse blastocysts. In this report, I describe a new and simplified method for establishing pluripotent cell lines from mouse morulae of the 16- to 20-cell stage, which were disaggregated by the use of EDTA. From 17 cell lines established in such a way, 7 were characterized with respect to their differentiation potential: (i) When injected into syngeneic mice, the cells gave rise to solid, fully differentiated teratomas representing derivatives of all three germ layers. (ii) When cultured in suspension in vitro, the cells were able to differentiate into complex organized 'embryoid bodies' analogous to mouse early postimplantation embryos. These results strongly imply that embryonal stem cell lines isolated from mouse morulae are highly homologous to conventionally isolated ES cells. In addition, my results indicate that murine pluripotent embryonal stem (ES) cell lines can be derived with more ease and higher efficiency from disaggregated morulae than from the 'inner cell mass' of blastocysts.
Insights
Researchers developed a simpler method to create pluripotent stem cell lines from mouse morulae. These new embryonal stem (ES) cells are homologous to conventional ES cells and easier to derive.
Area of Science:
- Stem cell biology
- Developmental biology
- Genetics
Background:
- Traditionally, mouse pluripotent stem cell lines are derived from the inner cell mass of blastocysts.
- Establishing these cell lines is a complex and often inefficient process.
Purpose of the Study:
- To develop a simplified and more efficient method for deriving pluripotent stem cell lines from early-stage mouse embryos.
- To characterize the differentiation potential of stem cell lines derived from morulae.
Main Methods:
- Disaggregation of 16- to 20-cell stage mouse morulae using EDTA.
- Establishment and culture of resulting pluripotent cell lines.
- In vivo differentiation by injection into syngeneic mice.
- In vitro differentiation via suspension culture to form embryoid bodies.
Main Results:
- Successfully established 17 new pluripotent cell lines from disaggregated morulae.
- Characterized 7 cell lines, confirming their ability to form teratomas with derivatives from all three germ layers upon injection into mice.
- Demonstrated in vitro differentiation into embryoid bodies, analogous to early postimplantation embryos.
- Showed that morula-derived ES cells are highly homologous to blastocyst-derived ES cells.
Conclusions:
- Pluripotent embryonal stem (ES) cell lines can be derived from mouse morulae with greater ease and efficiency compared to conventional methods using blastocyst inner cell masses.
- Morula-derived ES cells exhibit similar differentiation potential to conventional ES cells, indicating high homology.
- This simplified method offers a more accessible route for generating murine pluripotent stem cell lines.
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