Mouse teratomas and embryoid bodies: their induction and differentiation

Area of Science:

• Developmental biology
• Cancer research
• Stem cell biology

Background:

• Teratomas are tumors containing diverse cell types.
• Early mouse embryos can form teratomas upon transplantation.

Purpose of the Study:

• To investigate teratoma formation from mouse embryos.
• To compare the differentiative capacity of teratocarcinomas in different states.

Main Methods:

• Induction of teratomas via transplantation of mouse blastocysts and egg-cylinders.
• In vitro culture of blastocysts to form teratomas.
• Derivation and maintenance of transplantable teratocarcinomas and embryoid bodies.

Main Results:

• Teratomas were successfully induced from both C3H and 129/J mouse blastocysts and C3H egg-cylinders.
• In vitro cultured blastocysts also formed teratomas.
• Derived teratocarcinomas maintained similar differentiative potential as solid tumors or embryoid bodies.

Conclusions:

• Extra-uterine transplantation of early mouse embryos is an effective method for teratoma induction.
• Teratocarcinoma differentiation is consistent regardless of whether it is maintained as a solid tumor or as embryoid bodies.