An air-liquid interphase approach for modeling the early embryo-maternal contact zone

Area of Science:

• Reproductive biology
• Cell biology
• Developmental biology

Background:

• Mammalian oviduct epithelial cells are crucial for early embryo development and transport.
• Current in vitro models often fail to fully replicate the complex oviduct microenvironment.
• Understanding early embryo-maternal interactions is vital for reproductive success and treating infertility.

Purpose of the Study:

• To develop a novel air-liquid interphase culture system for mammalian oviduct epithelial cells.
• To create functional in vitro oviduct epithelial tissues capable of supporting embryo development.
• To establish a standardized platform for studying early embryo-maternal interactions.

Main Methods:

• Utilized an air-liquid interphase (ALI) culture technique for mammalian oviduct epithelial cells.
• Co-cultured the developed in vitro oviduct epithelia with living zygotes.
• Assessed embryonic development up to the blastocyst stage without exogenous embryo culture medium.

Main Results:

• Successfully generated functional epithelial tissues from mammalian oviduct cells using ALI culture.
• Demonstrated that these in vitro oviduct epithelia can produce oviduct fluid surrogates.
• Showcased successful embryonic development to the blastocyst stage when co-cultured with zygotes, without additional embryo culture medium.

Conclusions:

• The ALI culture procedure effectively generates functional in vitro oviduct epithelial tissues.
• This system supports early embryonic development, mimicking in vivo conditions.
• The strategy offers a broadly applicable tool for standardized in vitro analysis of early embryo-maternal interactions.